diff options
Diffstat (limited to 'editor/libeditor/HTMLEditRules.cpp')
| -rw-r--r-- | editor/libeditor/HTMLEditRules.cpp | 8785 |
1 files changed, 8785 insertions, 0 deletions
diff --git a/editor/libeditor/HTMLEditRules.cpp b/editor/libeditor/HTMLEditRules.cpp new file mode 100644 index 000000000..c2d61f767 --- /dev/null +++ b/editor/libeditor/HTMLEditRules.cpp @@ -0,0 +1,8785 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=2 sw=2 et tw=79: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "HTMLEditRules.h" + +#include <stdlib.h> + +#include "HTMLEditUtils.h" +#include "TextEditUtils.h" +#include "WSRunObject.h" +#include "mozilla/Assertions.h" +#include "mozilla/CSSEditUtils.h" +#include "mozilla/EditorUtils.h" +#include "mozilla/HTMLEditor.h" +#include "mozilla/MathAlgorithms.h" +#include "mozilla/Preferences.h" +#include "mozilla/dom/Selection.h" +#include "mozilla/dom/Element.h" +#include "mozilla/OwningNonNull.h" +#include "mozilla/mozalloc.h" +#include "nsAutoPtr.h" +#include "nsAString.h" +#include "nsAlgorithm.h" +#include "nsCRT.h" +#include "nsCRTGlue.h" +#include "nsComponentManagerUtils.h" +#include "nsContentUtils.h" +#include "nsDebug.h" +#include "nsError.h" +#include "nsGkAtoms.h" +#include "nsIAtom.h" +#include "nsIContent.h" +#include "nsIContentIterator.h" +#include "nsID.h" +#include "nsIDOMCharacterData.h" +#include "nsIDOMDocument.h" +#include "nsIDOMElement.h" +#include "nsIDOMNode.h" +#include "nsIDOMText.h" +#include "nsIFrame.h" +#include "nsIHTMLAbsPosEditor.h" +#include "nsIHTMLDocument.h" +#include "nsINode.h" +#include "nsLiteralString.h" +#include "nsRange.h" +#include "nsReadableUtils.h" +#include "nsString.h" +#include "nsStringFwd.h" +#include "nsTArray.h" +#include "nsTextNode.h" +#include "nsThreadUtils.h" +#include "nsUnicharUtils.h" +#include <algorithm> + +// Workaround for windows headers +#ifdef SetProp +#undef SetProp +#endif + +class nsISupports; + +namespace mozilla { + +class RulesInfo; + +using namespace dom; + +//const static char* kMOZEditorBogusNodeAttr="MOZ_EDITOR_BOGUS_NODE"; +//const static char* kMOZEditorBogusNodeValue="TRUE"; + +enum +{ + kLonely = 0, + kPrevSib = 1, + kNextSib = 2, + kBothSibs = 3 +}; + +/******************************************************** + * first some helpful functors we will use + ********************************************************/ + +static bool IsBlockNode(const nsINode& node) +{ + return HTMLEditor::NodeIsBlockStatic(&node); +} + +static bool IsInlineNode(const nsINode& node) +{ + return !IsBlockNode(node); +} + +static bool +IsStyleCachePreservingAction(EditAction action) +{ + return action == EditAction::deleteSelection || + action == EditAction::insertBreak || + action == EditAction::makeList || + action == EditAction::indent || + action == EditAction::outdent || + action == EditAction::align || + action == EditAction::makeBasicBlock || + action == EditAction::removeList || + action == EditAction::makeDefListItem || + action == EditAction::insertElement || + action == EditAction::insertQuotation; +} + +class TableCellAndListItemFunctor final : public BoolDomIterFunctor +{ +public: + // Used to build list of all li's, td's & th's iterator covers + virtual bool operator()(nsINode* aNode) const + { + return HTMLEditUtils::IsTableCell(aNode) || + HTMLEditUtils::IsListItem(aNode); + } +}; + +class BRNodeFunctor final : public BoolDomIterFunctor +{ +public: + virtual bool operator()(nsINode* aNode) const + { + return aNode->IsHTMLElement(nsGkAtoms::br); + } +}; + +class EmptyEditableFunctor final : public BoolDomIterFunctor +{ +public: + explicit EmptyEditableFunctor(HTMLEditor* aHTMLEditor) + : mHTMLEditor(aHTMLEditor) + {} + + virtual bool operator()(nsINode* aNode) const + { + if (mHTMLEditor->IsEditable(aNode) && + (HTMLEditUtils::IsListItem(aNode) || + HTMLEditUtils::IsTableCellOrCaption(*aNode))) { + bool bIsEmptyNode; + nsresult rv = + mHTMLEditor->IsEmptyNode(aNode, &bIsEmptyNode, false, false); + NS_ENSURE_SUCCESS(rv, false); + if (bIsEmptyNode) { + return true; + } + } + return false; + } + +protected: + HTMLEditor* mHTMLEditor; +}; + +/******************************************************** + * mozilla::HTMLEditRules + ********************************************************/ + +HTMLEditRules::HTMLEditRules() + : mHTMLEditor(nullptr) + , mListenerEnabled(false) + , mReturnInEmptyLIKillsList(false) + , mDidDeleteSelection(false) + , mDidRangedDelete(false) + , mRestoreContentEditableCount(false) + , mJoinOffset(0) +{ + InitFields(); +} + +void +HTMLEditRules::InitFields() +{ + mHTMLEditor = nullptr; + mDocChangeRange = nullptr; + mListenerEnabled = true; + mReturnInEmptyLIKillsList = true; + mDidDeleteSelection = false; + mDidRangedDelete = false; + mRestoreContentEditableCount = false; + mUtilRange = nullptr; + mJoinOffset = 0; + mNewBlock = nullptr; + mRangeItem = new RangeItem(); + // populate mCachedStyles + mCachedStyles[0] = StyleCache(nsGkAtoms::b, EmptyString(), EmptyString()); + mCachedStyles[1] = StyleCache(nsGkAtoms::i, EmptyString(), EmptyString()); + mCachedStyles[2] = StyleCache(nsGkAtoms::u, EmptyString(), EmptyString()); + mCachedStyles[3] = StyleCache(nsGkAtoms::font, NS_LITERAL_STRING("face"), EmptyString()); + mCachedStyles[4] = StyleCache(nsGkAtoms::font, NS_LITERAL_STRING("size"), EmptyString()); + mCachedStyles[5] = StyleCache(nsGkAtoms::font, NS_LITERAL_STRING("color"), EmptyString()); + mCachedStyles[6] = StyleCache(nsGkAtoms::tt, EmptyString(), EmptyString()); + mCachedStyles[7] = StyleCache(nsGkAtoms::em, EmptyString(), EmptyString()); + mCachedStyles[8] = StyleCache(nsGkAtoms::strong, EmptyString(), EmptyString()); + mCachedStyles[9] = StyleCache(nsGkAtoms::dfn, EmptyString(), EmptyString()); + mCachedStyles[10] = StyleCache(nsGkAtoms::code, EmptyString(), EmptyString()); + mCachedStyles[11] = StyleCache(nsGkAtoms::samp, EmptyString(), EmptyString()); + mCachedStyles[12] = StyleCache(nsGkAtoms::var, EmptyString(), EmptyString()); + mCachedStyles[13] = StyleCache(nsGkAtoms::cite, EmptyString(), EmptyString()); + mCachedStyles[14] = StyleCache(nsGkAtoms::abbr, EmptyString(), EmptyString()); + mCachedStyles[15] = StyleCache(nsGkAtoms::acronym, EmptyString(), EmptyString()); + mCachedStyles[16] = StyleCache(nsGkAtoms::backgroundColor, EmptyString(), EmptyString()); + mCachedStyles[17] = StyleCache(nsGkAtoms::sub, EmptyString(), EmptyString()); + mCachedStyles[18] = StyleCache(nsGkAtoms::sup, EmptyString(), EmptyString()); +} + +HTMLEditRules::~HTMLEditRules() +{ + // remove ourselves as a listener to edit actions + // In some cases, we have already been removed by + // ~HTMLEditor, in which case we will get a null pointer here + // which we ignore. But this allows us to add the ability to + // switch rule sets on the fly if we want. + if (mHTMLEditor) { + mHTMLEditor->RemoveEditActionListener(this); + } +} + +NS_IMPL_ADDREF_INHERITED(HTMLEditRules, TextEditRules) +NS_IMPL_RELEASE_INHERITED(HTMLEditRules, TextEditRules) +NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLEditRules) + NS_INTERFACE_TABLE_INHERITED(HTMLEditRules, nsIEditActionListener) +NS_INTERFACE_TABLE_TAIL_INHERITING(TextEditRules) + +NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLEditRules, TextEditRules, + mDocChangeRange, mUtilRange, mNewBlock, + mRangeItem) + +NS_IMETHODIMP +HTMLEditRules::Init(TextEditor* aTextEditor) +{ + InitFields(); + + mHTMLEditor = static_cast<HTMLEditor*>(aTextEditor); + + // call through to base class Init + nsresult rv = TextEditRules::Init(aTextEditor); + NS_ENSURE_SUCCESS(rv, rv); + + // cache any prefs we care about + static const char kPrefName[] = + "editor.html.typing.returnInEmptyListItemClosesList"; + nsAdoptingCString returnInEmptyLIKillsList = + Preferences::GetCString(kPrefName); + + // only when "false", becomes FALSE. Otherwise (including empty), TRUE. + // XXX Why was this pref designed as a string and not bool? + mReturnInEmptyLIKillsList = !returnInEmptyLIKillsList.EqualsLiteral("false"); + + // make a utility range for use by the listenter + nsCOMPtr<nsINode> node = mHTMLEditor->GetRoot(); + if (!node) { + node = mHTMLEditor->GetDocument(); + } + + NS_ENSURE_STATE(node); + + mUtilRange = new nsRange(node); + + // set up mDocChangeRange to be whole doc + // temporarily turn off rules sniffing + AutoLockRulesSniffing lockIt(this); + if (!mDocChangeRange) { + mDocChangeRange = new nsRange(node); + } + + if (node->IsElement()) { + ErrorResult rv; + mDocChangeRange->SelectNode(*node, rv); + NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult()); + AdjustSpecialBreaks(); + } + + // add ourselves as a listener to edit actions + return mHTMLEditor->AddEditActionListener(this); +} + +NS_IMETHODIMP +HTMLEditRules::DetachEditor() +{ + if (mHTMLEditor) { + mHTMLEditor->RemoveEditActionListener(this); + } + mHTMLEditor = nullptr; + return TextEditRules::DetachEditor(); +} + +NS_IMETHODIMP +HTMLEditRules::BeforeEdit(EditAction action, + nsIEditor::EDirection aDirection) +{ + if (mLockRulesSniffing) { + return NS_OK; + } + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + AutoLockRulesSniffing lockIt(this); + mDidExplicitlySetInterline = false; + + if (!mActionNesting) { + mActionNesting++; + + // Clear our flag about if just deleted a range + mDidRangedDelete = false; + + // Remember where our selection was before edit action took place: + + // Get selection + RefPtr<Selection> selection = htmlEditor->GetSelection(); + + // Get the selection location + if (NS_WARN_IF(!selection) || !selection->RangeCount()) { + return NS_ERROR_UNEXPECTED; + } + mRangeItem->startNode = selection->GetRangeAt(0)->GetStartParent(); + mRangeItem->startOffset = selection->GetRangeAt(0)->StartOffset(); + mRangeItem->endNode = selection->GetRangeAt(0)->GetEndParent(); + mRangeItem->endOffset = selection->GetRangeAt(0)->EndOffset(); + nsCOMPtr<nsINode> selStartNode = mRangeItem->startNode; + nsCOMPtr<nsINode> selEndNode = mRangeItem->endNode; + + // Register with range updater to track this as we perturb the doc + htmlEditor->mRangeUpdater.RegisterRangeItem(mRangeItem); + + // Clear deletion state bool + mDidDeleteSelection = false; + + // Clear out mDocChangeRange and mUtilRange + if (mDocChangeRange) { + // Clear out our accounting of what changed + mDocChangeRange->Reset(); + } + if (mUtilRange) { + // Ditto for mUtilRange. + mUtilRange->Reset(); + } + + // Remember current inline styles for deletion and normal insertion ops + if (action == EditAction::insertText || + action == EditAction::insertIMEText || + action == EditAction::deleteSelection || + IsStyleCachePreservingAction(action)) { + nsCOMPtr<nsINode> selNode = + aDirection == nsIEditor::eNext ? selEndNode : selStartNode; + nsresult rv = CacheInlineStyles(GetAsDOMNode(selNode)); + NS_ENSURE_SUCCESS(rv, rv); + } + + // Stabilize the document against contenteditable count changes + nsCOMPtr<nsIDOMDocument> doc = htmlEditor->GetDOMDocument(); + NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED); + nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(doc); + NS_ENSURE_TRUE(htmlDoc, NS_ERROR_FAILURE); + if (htmlDoc->GetEditingState() == nsIHTMLDocument::eContentEditable) { + htmlDoc->ChangeContentEditableCount(nullptr, +1); + mRestoreContentEditableCount = true; + } + + // Check that selection is in subtree defined by body node + ConfirmSelectionInBody(); + // Let rules remember the top level action + mTheAction = action; + } + return NS_OK; +} + + +NS_IMETHODIMP +HTMLEditRules::AfterEdit(EditAction action, + nsIEditor::EDirection aDirection) +{ + if (mLockRulesSniffing) { + return NS_OK; + } + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + AutoLockRulesSniffing lockIt(this); + + MOZ_ASSERT(mActionNesting > 0); + nsresult rv = NS_OK; + mActionNesting--; + if (!mActionNesting) { + // Do all the tricky stuff + rv = AfterEditInner(action, aDirection); + + // Free up selectionState range item + htmlEditor->mRangeUpdater.DropRangeItem(mRangeItem); + + // Reset the contenteditable count to its previous value + if (mRestoreContentEditableCount) { + nsCOMPtr<nsIDOMDocument> doc = htmlEditor->GetDOMDocument(); + NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED); + nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(doc); + NS_ENSURE_TRUE(htmlDoc, NS_ERROR_FAILURE); + if (htmlDoc->GetEditingState() == nsIHTMLDocument::eContentEditable) { + htmlDoc->ChangeContentEditableCount(nullptr, -1); + } + mRestoreContentEditableCount = false; + } + } + + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +nsresult +HTMLEditRules::AfterEditInner(EditAction action, + nsIEditor::EDirection aDirection) +{ + ConfirmSelectionInBody(); + if (action == EditAction::ignore) { + return NS_OK; + } + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<Selection> selection = mHTMLEditor->GetSelection(); + NS_ENSURE_STATE(selection); + + nsCOMPtr<nsIDOMNode> rangeStartParent, rangeEndParent; + int32_t rangeStartOffset = 0, rangeEndOffset = 0; + // do we have a real range to act on? + bool bDamagedRange = false; + if (mDocChangeRange) { + mDocChangeRange->GetStartContainer(getter_AddRefs(rangeStartParent)); + mDocChangeRange->GetEndContainer(getter_AddRefs(rangeEndParent)); + mDocChangeRange->GetStartOffset(&rangeStartOffset); + mDocChangeRange->GetEndOffset(&rangeEndOffset); + if (rangeStartParent && rangeEndParent) + bDamagedRange = true; + } + + if (bDamagedRange && !((action == EditAction::undo) || + (action == EditAction::redo))) { + // don't let any txns in here move the selection around behind our back. + // Note that this won't prevent explicit selection setting from working. + NS_ENSURE_STATE(mHTMLEditor); + AutoTransactionsConserveSelection dontSpazMySelection(mHTMLEditor); + + // expand the "changed doc range" as needed + PromoteRange(*mDocChangeRange, action); + + // if we did a ranged deletion or handling backspace key, make sure we have + // a place to put caret. + // Note we only want to do this if the overall operation was deletion, + // not if deletion was done along the way for EditAction::loadHTML, EditAction::insertText, etc. + // That's why this is here rather than DidDeleteSelection(). + if (action == EditAction::deleteSelection && mDidRangedDelete) { + nsresult rv = InsertBRIfNeeded(selection); + NS_ENSURE_SUCCESS(rv, rv); + } + + // add in any needed <br>s, and remove any unneeded ones. + AdjustSpecialBreaks(); + + // merge any adjacent text nodes + if (action != EditAction::insertText && + action != EditAction::insertIMEText) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->CollapseAdjacentTextNodes(mDocChangeRange); + NS_ENSURE_SUCCESS(rv, rv); + } + + // clean up any empty nodes in the selection + nsresult rv = RemoveEmptyNodes(); + NS_ENSURE_SUCCESS(rv, rv); + + // attempt to transform any unneeded nbsp's into spaces after doing various operations + if (action == EditAction::insertText || + action == EditAction::insertIMEText || + action == EditAction::deleteSelection || + action == EditAction::insertBreak || + action == EditAction::htmlPaste || + action == EditAction::loadHTML) { + rv = AdjustWhitespace(selection); + NS_ENSURE_SUCCESS(rv, rv); + + // also do this for original selection endpoints. + NS_ENSURE_STATE(mHTMLEditor); + NS_ENSURE_STATE(mRangeItem->startNode); + NS_ENSURE_STATE(mRangeItem->endNode); + WSRunObject(mHTMLEditor, mRangeItem->startNode, + mRangeItem->startOffset).AdjustWhitespace(); + // we only need to handle old selection endpoint if it was different from start + if (mRangeItem->startNode != mRangeItem->endNode || + mRangeItem->startOffset != mRangeItem->endOffset) { + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject(mHTMLEditor, mRangeItem->endNode, + mRangeItem->endOffset).AdjustWhitespace(); + } + } + + // if we created a new block, make sure selection lands in it + if (mNewBlock) { + rv = PinSelectionToNewBlock(selection); + mNewBlock = nullptr; + } + + // adjust selection for insert text, html paste, and delete actions + if (action == EditAction::insertText || + action == EditAction::insertIMEText || + action == EditAction::deleteSelection || + action == EditAction::insertBreak || + action == EditAction::htmlPaste || + action == EditAction::loadHTML) { + rv = AdjustSelection(selection, aDirection); + NS_ENSURE_SUCCESS(rv, rv); + } + + // check for any styles which were removed inappropriately + if (action == EditAction::insertText || + action == EditAction::insertIMEText || + action == EditAction::deleteSelection || + IsStyleCachePreservingAction(action)) { + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->mTypeInState->UpdateSelState(selection); + rv = ReapplyCachedStyles(); + NS_ENSURE_SUCCESS(rv, rv); + ClearCachedStyles(); + } + } + + NS_ENSURE_STATE(mHTMLEditor); + + nsresult rv = + mHTMLEditor->HandleInlineSpellCheck(action, selection, + GetAsDOMNode(mRangeItem->startNode), + mRangeItem->startOffset, + rangeStartParent, rangeStartOffset, + rangeEndParent, rangeEndOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // detect empty doc + rv = CreateBogusNodeIfNeeded(selection); + NS_ENSURE_SUCCESS(rv, rv); + + // adjust selection HINT if needed + if (!mDidExplicitlySetInterline) { + CheckInterlinePosition(*selection); + } + + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::WillDoAction(Selection* aSelection, + RulesInfo* aInfo, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aInfo && aCancel && aHandled); + + *aCancel = false; + *aHandled = false; + + // my kingdom for dynamic cast + TextRulesInfo* info = static_cast<TextRulesInfo*>(aInfo); + + // Deal with actions for which we don't need to check whether the selection is + // editable. + if (info->action == EditAction::outputText || + info->action == EditAction::undo || + info->action == EditAction::redo) { + return TextEditRules::WillDoAction(aSelection, aInfo, aCancel, aHandled); + } + + // Nothing to do if there's no selection to act on + if (!aSelection) { + return NS_OK; + } + NS_ENSURE_TRUE(aSelection->RangeCount(), NS_OK); + + RefPtr<nsRange> range = aSelection->GetRangeAt(0); + nsCOMPtr<nsINode> selStartNode = range->GetStartParent(); + + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsModifiableNode(selStartNode)) { + *aCancel = true; + return NS_OK; + } + + nsCOMPtr<nsINode> selEndNode = range->GetEndParent(); + + if (selStartNode != selEndNode) { + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsModifiableNode(selEndNode)) { + *aCancel = true; + return NS_OK; + } + + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsModifiableNode(range->GetCommonAncestor())) { + *aCancel = true; + return NS_OK; + } + } + + switch (info->action) { + case EditAction::insertText: + case EditAction::insertIMEText: + UndefineCaretBidiLevel(aSelection); + return WillInsertText(info->action, aSelection, aCancel, aHandled, + info->inString, info->outString, info->maxLength); + case EditAction::loadHTML: + return WillLoadHTML(aSelection, aCancel); + case EditAction::insertBreak: + UndefineCaretBidiLevel(aSelection); + return WillInsertBreak(*aSelection, aCancel, aHandled); + case EditAction::deleteSelection: + return WillDeleteSelection(aSelection, info->collapsedAction, + info->stripWrappers, aCancel, aHandled); + case EditAction::makeList: + return WillMakeList(aSelection, info->blockType, info->entireList, + info->bulletType, aCancel, aHandled); + case EditAction::indent: + return WillIndent(aSelection, aCancel, aHandled); + case EditAction::outdent: + return WillOutdent(*aSelection, aCancel, aHandled); + case EditAction::setAbsolutePosition: + return WillAbsolutePosition(*aSelection, aCancel, aHandled); + case EditAction::removeAbsolutePosition: + return WillRemoveAbsolutePosition(aSelection, aCancel, aHandled); + case EditAction::align: + return WillAlign(*aSelection, *info->alignType, aCancel, aHandled); + case EditAction::makeBasicBlock: + return WillMakeBasicBlock(*aSelection, *info->blockType, aCancel, + aHandled); + case EditAction::removeList: + return WillRemoveList(aSelection, info->bOrdered, aCancel, aHandled); + case EditAction::makeDefListItem: + return WillMakeDefListItem(aSelection, info->blockType, info->entireList, + aCancel, aHandled); + case EditAction::insertElement: + WillInsert(*aSelection, aCancel); + return NS_OK; + case EditAction::decreaseZIndex: + return WillRelativeChangeZIndex(aSelection, -1, aCancel, aHandled); + case EditAction::increaseZIndex: + return WillRelativeChangeZIndex(aSelection, 1, aCancel, aHandled); + default: + return TextEditRules::WillDoAction(aSelection, aInfo, + aCancel, aHandled); + } +} + +NS_IMETHODIMP +HTMLEditRules::DidDoAction(Selection* aSelection, + RulesInfo* aInfo, + nsresult aResult) +{ + TextRulesInfo* info = static_cast<TextRulesInfo*>(aInfo); + switch (info->action) { + case EditAction::insertBreak: + return DidInsertBreak(aSelection, aResult); + case EditAction::deleteSelection: + return DidDeleteSelection(aSelection, info->collapsedAction, aResult); + case EditAction::makeBasicBlock: + case EditAction::indent: + case EditAction::outdent: + case EditAction::align: + return DidMakeBasicBlock(aSelection, aInfo, aResult); + case EditAction::setAbsolutePosition: { + nsresult rv = DidMakeBasicBlock(aSelection, aInfo, aResult); + NS_ENSURE_SUCCESS(rv, rv); + return DidAbsolutePosition(); + } + default: + // pass through to TextEditRules + return TextEditRules::DidDoAction(aSelection, aInfo, aResult); + } +} + +nsresult +HTMLEditRules::GetListState(bool* aMixed, + bool* aOL, + bool* aUL, + bool* aDL) +{ + NS_ENSURE_TRUE(aMixed && aOL && aUL && aDL, NS_ERROR_NULL_POINTER); + *aMixed = false; + *aOL = false; + *aUL = false; + *aDL = false; + bool bNonList = false; + + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + nsresult rv = GetListActionNodes(arrayOfNodes, EntireList::no, + TouchContent::no); + NS_ENSURE_SUCCESS(rv, rv); + + // Examine list type for nodes in selection. + for (const auto& curNode : arrayOfNodes) { + if (!curNode->IsElement()) { + bNonList = true; + } else if (curNode->IsHTMLElement(nsGkAtoms::ul)) { + *aUL = true; + } else if (curNode->IsHTMLElement(nsGkAtoms::ol)) { + *aOL = true; + } else if (curNode->IsHTMLElement(nsGkAtoms::li)) { + if (dom::Element* parent = curNode->GetParentElement()) { + if (parent->IsHTMLElement(nsGkAtoms::ul)) { + *aUL = true; + } else if (parent->IsHTMLElement(nsGkAtoms::ol)) { + *aOL = true; + } + } + } else if (curNode->IsAnyOfHTMLElements(nsGkAtoms::dl, + nsGkAtoms::dt, + nsGkAtoms::dd)) { + *aDL = true; + } else { + bNonList = true; + } + } + + // hokey arithmetic with booleans + if ((*aUL + *aOL + *aDL + bNonList) > 1) { + *aMixed = true; + } + + return NS_OK; +} + +nsresult +HTMLEditRules::GetListItemState(bool* aMixed, + bool* aLI, + bool* aDT, + bool* aDD) +{ + NS_ENSURE_TRUE(aMixed && aLI && aDT && aDD, NS_ERROR_NULL_POINTER); + *aMixed = false; + *aLI = false; + *aDT = false; + *aDD = false; + bool bNonList = false; + + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + nsresult rv = GetListActionNodes(arrayOfNodes, EntireList::no, + TouchContent::no); + NS_ENSURE_SUCCESS(rv, rv); + + // examine list type for nodes in selection + for (const auto& node : arrayOfNodes) { + if (!node->IsElement()) { + bNonList = true; + } else if (node->IsAnyOfHTMLElements(nsGkAtoms::ul, + nsGkAtoms::ol, + nsGkAtoms::li)) { + *aLI = true; + } else if (node->IsHTMLElement(nsGkAtoms::dt)) { + *aDT = true; + } else if (node->IsHTMLElement(nsGkAtoms::dd)) { + *aDD = true; + } else if (node->IsHTMLElement(nsGkAtoms::dl)) { + // need to look inside dl and see which types of items it has + bool bDT, bDD; + GetDefinitionListItemTypes(node->AsElement(), &bDT, &bDD); + *aDT |= bDT; + *aDD |= bDD; + } else { + bNonList = true; + } + } + + // hokey arithmetic with booleans + if (*aDT + *aDD + bNonList > 1) { + *aMixed = true; + } + + return NS_OK; +} + +nsresult +HTMLEditRules::GetAlignment(bool* aMixed, + nsIHTMLEditor::EAlignment* aAlign) +{ + MOZ_ASSERT(aMixed && aAlign); + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // For now, just return first alignment. We'll lie about if it's mixed. + // This is for efficiency given that our current ui doesn't care if it's + // mixed. + // cmanske: NOT TRUE! We would like to pay attention to mixed state in Format + // | Align submenu! + + // This routine assumes that alignment is done ONLY via divs + + // Default alignment is left + *aMixed = false; + *aAlign = nsIHTMLEditor::eLeft; + + // Get selection + NS_ENSURE_STATE(htmlEditor->GetSelection()); + OwningNonNull<Selection> selection = *htmlEditor->GetSelection(); + + // Get selection location + NS_ENSURE_TRUE(htmlEditor->GetRoot(), NS_ERROR_FAILURE); + OwningNonNull<Element> root = *htmlEditor->GetRoot(); + + int32_t rootOffset = root->GetParentNode() ? + root->GetParentNode()->IndexOf(root) : -1; + + NS_ENSURE_STATE(selection->GetRangeAt(0) && + selection->GetRangeAt(0)->GetStartParent()); + OwningNonNull<nsINode> parent = *selection->GetRangeAt(0)->GetStartParent(); + int32_t offset = selection->GetRangeAt(0)->StartOffset(); + + // Is the selection collapsed? + nsCOMPtr<nsINode> nodeToExamine; + if (selection->Collapsed() || parent->GetAsText()) { + // If selection is collapsed, we want to look at 'parent' and its ancestors + // for divs with alignment on them. If we are in a text node, then that is + // the node of interest. + nodeToExamine = parent; + } else if (parent->IsHTMLElement(nsGkAtoms::html) && offset == rootOffset) { + // If we have selected the body, let's look at the first editable node + nodeToExamine = htmlEditor->GetNextNode(parent, offset, true); + } else { + nsTArray<RefPtr<nsRange>> arrayOfRanges; + GetPromotedRanges(selection, arrayOfRanges, EditAction::align); + + // Use these ranges to construct a list of nodes to act on. + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + nsresult rv = GetNodesForOperation(arrayOfRanges, arrayOfNodes, + EditAction::align, TouchContent::no); + NS_ENSURE_SUCCESS(rv, rv); + nodeToExamine = arrayOfNodes.SafeElementAt(0); + } + + NS_ENSURE_TRUE(nodeToExamine, NS_ERROR_NULL_POINTER); + + NS_NAMED_LITERAL_STRING(typeAttrName, "align"); + nsCOMPtr<Element> blockParent = htmlEditor->GetBlock(*nodeToExamine); + + NS_ENSURE_TRUE(blockParent, NS_ERROR_FAILURE); + + if (htmlEditor->IsCSSEnabled() && + htmlEditor->mCSSEditUtils->IsCSSEditableProperty(blockParent, nullptr, + &typeAttrName)) { + // We are in CSS mode and we know how to align this element with CSS + nsAutoString value; + // Let's get the value(s) of text-align or margin-left/margin-right + htmlEditor->mCSSEditUtils->GetCSSEquivalentToHTMLInlineStyleSet( + blockParent, nullptr, &typeAttrName, value, CSSEditUtils::eComputed); + if (value.EqualsLiteral("center") || + value.EqualsLiteral("-moz-center") || + value.EqualsLiteral("auto auto")) { + *aAlign = nsIHTMLEditor::eCenter; + return NS_OK; + } + if (value.EqualsLiteral("right") || + value.EqualsLiteral("-moz-right") || + value.EqualsLiteral("auto 0px")) { + *aAlign = nsIHTMLEditor::eRight; + return NS_OK; + } + if (value.EqualsLiteral("justify")) { + *aAlign = nsIHTMLEditor::eJustify; + return NS_OK; + } + *aAlign = nsIHTMLEditor::eLeft; + return NS_OK; + } + + // Check up the ladder for divs with alignment + bool isFirstNodeToExamine = true; + for (; nodeToExamine; nodeToExamine = nodeToExamine->GetParentNode()) { + if (!isFirstNodeToExamine && + nodeToExamine->IsHTMLElement(nsGkAtoms::table)) { + // The node to examine is a table and this is not the first node we + // examine; let's break here to materialize the 'inline-block' behaviour + // of html tables regarding to text alignment + return NS_OK; + } + if (HTMLEditUtils::SupportsAlignAttr(GetAsDOMNode(nodeToExamine))) { + // Check for alignment + nsAutoString typeAttrVal; + nodeToExamine->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::align, + typeAttrVal); + ToLowerCase(typeAttrVal); + if (!typeAttrVal.IsEmpty()) { + if (typeAttrVal.EqualsLiteral("center")) { + *aAlign = nsIHTMLEditor::eCenter; + } else if (typeAttrVal.EqualsLiteral("right")) { + *aAlign = nsIHTMLEditor::eRight; + } else if (typeAttrVal.EqualsLiteral("justify")) { + *aAlign = nsIHTMLEditor::eJustify; + } else { + *aAlign = nsIHTMLEditor::eLeft; + } + return NS_OK; + } + } + isFirstNodeToExamine = false; + } + return NS_OK; +} + +static nsIAtom& MarginPropertyAtomForIndent(CSSEditUtils& aHTMLCSSUtils, + nsINode& aNode) +{ + nsAutoString direction; + aHTMLCSSUtils.GetComputedProperty(aNode, *nsGkAtoms::direction, direction); + return direction.EqualsLiteral("rtl") ? + *nsGkAtoms::marginRight : *nsGkAtoms::marginLeft; +} + +nsresult +HTMLEditRules::GetIndentState(bool* aCanIndent, + bool* aCanOutdent) +{ + // XXX Looks like that this is implementation of + // nsIHTMLEditor::getIndentState() however nobody calls this method + // even with the interface method. + NS_ENSURE_TRUE(aCanIndent && aCanOutdent, NS_ERROR_FAILURE); + *aCanIndent = true; + *aCanOutdent = false; + + // get selection + NS_ENSURE_STATE(mHTMLEditor && mHTMLEditor->GetSelection()); + OwningNonNull<Selection> selection = *mHTMLEditor->GetSelection(); + + // contruct a list of nodes to act on. + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + nsresult rv = GetNodesFromSelection(*selection, EditAction::indent, + arrayOfNodes, TouchContent::no); + NS_ENSURE_SUCCESS(rv, rv); + + // examine nodes in selection for blockquotes or list elements; + // these we can outdent. Note that we return true for canOutdent + // if *any* of the selection is outdentable, rather than all of it. + NS_ENSURE_STATE(mHTMLEditor); + bool useCSS = mHTMLEditor->IsCSSEnabled(); + for (auto& curNode : Reversed(arrayOfNodes)) { + if (HTMLEditUtils::IsNodeThatCanOutdent(GetAsDOMNode(curNode))) { + *aCanOutdent = true; + break; + } else if (useCSS) { + // we are in CSS mode, indentation is done using the margin-left (or margin-right) property + NS_ENSURE_STATE(mHTMLEditor); + nsIAtom& marginProperty = + MarginPropertyAtomForIndent(*mHTMLEditor->mCSSEditUtils, curNode); + nsAutoString value; + // retrieve its specified value + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->mCSSEditUtils->GetSpecifiedProperty(*curNode, + marginProperty, value); + float f; + nsCOMPtr<nsIAtom> unit; + // get its number part and its unit + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->mCSSEditUtils->ParseLength(value, &f, getter_AddRefs(unit)); + // if the number part is strictly positive, outdent is possible + if (0 < f) { + *aCanOutdent = true; + break; + } + } + } + + if (!*aCanOutdent) { + // if we haven't found something to outdent yet, also check the parents + // of selection endpoints. We might have a blockquote or list item + // in the parent hierarchy. + + // gather up info we need for test + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIDOMNode> parent, tmp, root = do_QueryInterface(mHTMLEditor->GetRoot()); + NS_ENSURE_TRUE(root, NS_ERROR_NULL_POINTER); + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<Selection> selection = mHTMLEditor->GetSelection(); + NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER); + + // test start parent hierarchy + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetStartNodeAndOffset(selection, getter_AddRefs(parent), + &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + while (parent && parent != root) { + if (HTMLEditUtils::IsNodeThatCanOutdent(parent)) { + *aCanOutdent = true; + break; + } + tmp = parent; + tmp->GetParentNode(getter_AddRefs(parent)); + } + + // test end parent hierarchy + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetEndNodeAndOffset(selection, getter_AddRefs(parent), + &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + while (parent && parent != root) { + if (HTMLEditUtils::IsNodeThatCanOutdent(parent)) { + *aCanOutdent = true; + break; + } + tmp = parent; + tmp->GetParentNode(getter_AddRefs(parent)); + } + } + return NS_OK; +} + + +nsresult +HTMLEditRules::GetParagraphState(bool* aMixed, + nsAString& outFormat) +{ + // This routine is *heavily* tied to our ui choices in the paragraph + // style popup. I can't see a way around that. + NS_ENSURE_TRUE(aMixed, NS_ERROR_NULL_POINTER); + *aMixed = true; + outFormat.Truncate(0); + + bool bMixed = false; + // using "x" as an uninitialized value, since "" is meaningful + nsAutoString formatStr(NS_LITERAL_STRING("x")); + + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + nsresult rv = GetParagraphFormatNodes(arrayOfNodes, TouchContent::no); + NS_ENSURE_SUCCESS(rv, rv); + + // post process list. We need to replace any block nodes that are not format + // nodes with their content. This is so we only have to look "up" the hierarchy + // to find format nodes, instead of both up and down. + for (int32_t i = arrayOfNodes.Length() - 1; i >= 0; i--) { + auto& curNode = arrayOfNodes[i]; + nsAutoString format; + // if it is a known format node we have it easy + if (IsBlockNode(curNode) && !HTMLEditUtils::IsFormatNode(curNode)) { + // arrayOfNodes.RemoveObject(curNode); + rv = AppendInnerFormatNodes(arrayOfNodes, curNode); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + // we might have an empty node list. if so, find selection parent + // and put that on the list + if (arrayOfNodes.IsEmpty()) { + nsCOMPtr<nsINode> selNode; + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<Selection> selection = mHTMLEditor->GetSelection(); + NS_ENSURE_STATE(selection); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetStartNodeAndOffset(selection, getter_AddRefs(selNode), + &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_TRUE(selNode, NS_ERROR_NULL_POINTER); + arrayOfNodes.AppendElement(*selNode); + } + + // remember root node + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIDOMElement> rootElem = do_QueryInterface(mHTMLEditor->GetRoot()); + NS_ENSURE_TRUE(rootElem, NS_ERROR_NULL_POINTER); + + // loop through the nodes in selection and examine their paragraph format + for (auto& curNode : Reversed(arrayOfNodes)) { + nsAutoString format; + // if it is a known format node we have it easy + if (HTMLEditUtils::IsFormatNode(curNode)) { + GetFormatString(GetAsDOMNode(curNode), format); + } else if (IsBlockNode(curNode)) { + // this is a div or some other non-format block. + // we should ignore it. Its children were appended to this list + // by AppendInnerFormatNodes() call above. We will get needed + // info when we examine them instead. + continue; + } else { + nsCOMPtr<nsIDOMNode> node, tmp = GetAsDOMNode(curNode); + tmp->GetParentNode(getter_AddRefs(node)); + while (node) { + if (node == rootElem) { + format.Truncate(0); + break; + } else if (HTMLEditUtils::IsFormatNode(node)) { + GetFormatString(node, format); + break; + } + // else keep looking up + tmp = node; + tmp->GetParentNode(getter_AddRefs(node)); + } + } + + // if this is the first node, we've found, remember it as the format + if (formatStr.EqualsLiteral("x")) { + formatStr = format; + } + // else make sure it matches previously found format + else if (format != formatStr) { + bMixed = true; + break; + } + } + + *aMixed = bMixed; + outFormat = formatStr; + return NS_OK; +} + +nsresult +HTMLEditRules::AppendInnerFormatNodes(nsTArray<OwningNonNull<nsINode>>& aArray, + nsINode* aNode) +{ + MOZ_ASSERT(aNode); + + // we only need to place any one inline inside this node onto + // the list. They are all the same for purposes of determining + // paragraph style. We use foundInline to track this as we are + // going through the children in the loop below. + bool foundInline = false; + for (nsIContent* child = aNode->GetFirstChild(); + child; + child = child->GetNextSibling()) { + bool isBlock = IsBlockNode(*child); + bool isFormat = HTMLEditUtils::IsFormatNode(child); + if (isBlock && !isFormat) { + // if it's a div, etc., recurse + AppendInnerFormatNodes(aArray, child); + } else if (isFormat) { + aArray.AppendElement(*child); + } else if (!foundInline) { + // if this is the first inline we've found, use it + foundInline = true; + aArray.AppendElement(*child); + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::GetFormatString(nsIDOMNode* aNode, + nsAString& outFormat) +{ + NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER); + + if (HTMLEditUtils::IsFormatNode(aNode)) { + nsCOMPtr<nsIAtom> atom = EditorBase::GetTag(aNode); + atom->ToString(outFormat); + } else { + outFormat.Truncate(); + } + return NS_OK; +} + +void +HTMLEditRules::WillInsert(Selection& aSelection, + bool* aCancel) +{ + MOZ_ASSERT(aCancel); + + TextEditRules::WillInsert(aSelection, aCancel); + + NS_ENSURE_TRUE_VOID(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Adjust selection to prevent insertion after a moz-BR. This next only + // works for collapsed selections right now, because selection is a pain to + // work with when not collapsed. (no good way to extend start or end of + // selection), so we ignore those types of selections. + if (!aSelection.Collapsed()) { + return; + } + + // If we are after a mozBR in the same block, then move selection to be + // before it + NS_ENSURE_TRUE_VOID(aSelection.GetRangeAt(0) && + aSelection.GetRangeAt(0)->GetStartParent()); + OwningNonNull<nsINode> selNode = *aSelection.GetRangeAt(0)->GetStartParent(); + int32_t selOffset = aSelection.GetRangeAt(0)->StartOffset(); + + // Get prior node + nsCOMPtr<nsIContent> priorNode = htmlEditor->GetPriorHTMLNode(selNode, + selOffset); + if (priorNode && TextEditUtils::IsMozBR(priorNode)) { + nsCOMPtr<Element> block1 = htmlEditor->GetBlock(selNode); + nsCOMPtr<Element> block2 = htmlEditor->GetBlockNodeParent(priorNode); + + if (block1 && block1 == block2) { + // If we are here then the selection is right after a mozBR that is in + // the same block as the selection. We need to move the selection start + // to be before the mozBR. + selNode = priorNode->GetParentNode(); + selOffset = selNode->IndexOf(priorNode); + nsresult rv = aSelection.Collapse(selNode, selOffset); + NS_ENSURE_SUCCESS_VOID(rv); + } + } + + if (mDidDeleteSelection && + (mTheAction == EditAction::insertText || + mTheAction == EditAction::insertIMEText || + mTheAction == EditAction::deleteSelection)) { + nsresult rv = ReapplyCachedStyles(); + NS_ENSURE_SUCCESS_VOID(rv); + } + // For most actions we want to clear the cached styles, but there are + // exceptions + if (!IsStyleCachePreservingAction(mTheAction)) { + ClearCachedStyles(); + } +} + +nsresult +HTMLEditRules::WillInsertText(EditAction aAction, + Selection* aSelection, + bool* aCancel, + bool* aHandled, + const nsAString* inString, + nsAString* outString, + int32_t aMaxLength) +{ + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + + if (inString->IsEmpty() && aAction != EditAction::insertIMEText) { + // HACK: this is a fix for bug 19395 + // I can't outlaw all empty insertions + // because IME transaction depend on them + // There is more work to do to make the + // world safe for IME. + *aCancel = true; + *aHandled = false; + return NS_OK; + } + + // initialize out param + *aCancel = false; + *aHandled = true; + // If the selection isn't collapsed, delete it. Don't delete existing inline + // tags, because we're hopefully going to insert text (bug 787432). + if (!aSelection->Collapsed()) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->DeleteSelection(nsIEditor::eNone, nsIEditor::eNoStrip); + NS_ENSURE_SUCCESS(rv, rv); + } + + WillInsert(*aSelection, aCancel); + // initialize out param + // we want to ignore result of WillInsert() + *aCancel = false; + + // we need to get the doc + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIDocument> doc = mHTMLEditor->GetDocument(); + NS_ENSURE_STATE(doc); + + // for every property that is set, insert a new inline style node + nsresult rv = CreateStyleForInsertText(*aSelection, *doc); + NS_ENSURE_SUCCESS(rv, rv); + + // get the (collapsed) selection location + NS_ENSURE_STATE(mHTMLEditor); + NS_ENSURE_STATE(aSelection->GetRangeAt(0)); + nsCOMPtr<nsINode> selNode = aSelection->GetRangeAt(0)->GetStartParent(); + int32_t selOffset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_STATE(selNode); + + // dont put text in places that can't have it + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsTextNode(selNode) && + (!mHTMLEditor || !mHTMLEditor->CanContainTag(*selNode, + *nsGkAtoms::textTagName))) { + return NS_ERROR_FAILURE; + } + + if (aAction == EditAction::insertIMEText) { + // Right now the WSRunObject code bails on empty strings, but IME needs + // the InsertTextImpl() call to still happen since empty strings are meaningful there. + NS_ENSURE_STATE(mHTMLEditor); + // If there is one or more IME selections, its minimum offset should be + // the insertion point. + int32_t IMESelectionOffset = + mHTMLEditor->GetIMESelectionStartOffsetIn(selNode); + if (IMESelectionOffset >= 0) { + selOffset = IMESelectionOffset; + } + if (inString->IsEmpty()) { + rv = mHTMLEditor->InsertTextImpl(*inString, address_of(selNode), + &selOffset, doc); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + WSRunObject wsObj(mHTMLEditor, selNode, selOffset); + rv = wsObj.InsertText(*inString, address_of(selNode), &selOffset, doc); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } + // aAction == kInsertText + else { + // find where we are + nsCOMPtr<nsINode> curNode = selNode; + int32_t curOffset = selOffset; + + // is our text going to be PREformatted? + // We remember this so that we know how to handle tabs. + bool isPRE; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->IsPreformatted(GetAsDOMNode(selNode), &isPRE); + NS_ENSURE_SUCCESS(rv, rv); + + // turn off the edit listener: we know how to + // build the "doc changed range" ourselves, and it's + // must faster to do it once here than to track all + // the changes one at a time. + AutoLockListener lockit(&mListenerEnabled); + + // don't spaz my selection in subtransactions + NS_ENSURE_STATE(mHTMLEditor); + AutoTransactionsConserveSelection dontSpazMySelection(mHTMLEditor); + nsAutoString tString(*inString); + const char16_t *unicodeBuf = tString.get(); + int32_t pos = 0; + NS_NAMED_LITERAL_STRING(newlineStr, LFSTR); + + // for efficiency, break out the pre case separately. This is because + // its a lot cheaper to search the input string for only newlines than + // it is to search for both tabs and newlines. + if (isPRE || IsPlaintextEditor()) { + while (unicodeBuf && pos != -1 && + pos < static_cast<int32_t>(inString->Length())) { + int32_t oldPos = pos; + int32_t subStrLen; + pos = tString.FindChar(nsCRT::LF, oldPos); + + if (pos != -1) { + subStrLen = pos - oldPos; + // if first char is newline, then use just it + if (!subStrLen) { + subStrLen = 1; + } + } else { + subStrLen = tString.Length() - oldPos; + pos = tString.Length(); + } + + nsDependentSubstring subStr(tString, oldPos, subStrLen); + + // is it a return? + if (subStr.Equals(newlineStr)) { + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> br = + mHTMLEditor->CreateBRImpl(address_of(curNode), &curOffset, + nsIEditor::eNone); + NS_ENSURE_STATE(br); + pos++; + } else { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->InsertTextImpl(subStr, address_of(curNode), + &curOffset, doc); + NS_ENSURE_SUCCESS(rv, rv); + } + } + } else { + NS_NAMED_LITERAL_STRING(tabStr, "\t"); + NS_NAMED_LITERAL_STRING(spacesStr, " "); + char specialChars[] = {TAB, nsCRT::LF, 0}; + while (unicodeBuf && pos != -1 && + pos < static_cast<int32_t>(inString->Length())) { + int32_t oldPos = pos; + int32_t subStrLen; + pos = tString.FindCharInSet(specialChars, oldPos); + + if (pos != -1) { + subStrLen = pos - oldPos; + // if first char is newline, then use just it + if (!subStrLen) { + subStrLen = 1; + } + } else { + subStrLen = tString.Length() - oldPos; + pos = tString.Length(); + } + + nsDependentSubstring subStr(tString, oldPos, subStrLen); + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject wsObj(mHTMLEditor, curNode, curOffset); + + // is it a tab? + if (subStr.Equals(tabStr)) { + rv = + wsObj.InsertText(spacesStr, address_of(curNode), &curOffset, doc); + NS_ENSURE_SUCCESS(rv, rv); + pos++; + } + // is it a return? + else if (subStr.Equals(newlineStr)) { + nsCOMPtr<Element> br = wsObj.InsertBreak(address_of(curNode), + &curOffset, + nsIEditor::eNone); + NS_ENSURE_TRUE(br, NS_ERROR_FAILURE); + pos++; + } else { + rv = wsObj.InsertText(subStr, address_of(curNode), &curOffset, doc); + NS_ENSURE_SUCCESS(rv, rv); + } + } + } + aSelection->SetInterlinePosition(false); + if (curNode) aSelection->Collapse(curNode, curOffset); + // manually update the doc changed range so that AfterEdit will clean up + // the correct portion of the document. + if (!mDocChangeRange) { + mDocChangeRange = new nsRange(selNode); + } + rv = mDocChangeRange->SetStart(selNode, selOffset); + NS_ENSURE_SUCCESS(rv, rv); + + if (curNode) { + rv = mDocChangeRange->SetEnd(curNode, curOffset); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + rv = mDocChangeRange->SetEnd(selNode, selOffset); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::WillLoadHTML(Selection* aSelection, + bool* aCancel) +{ + NS_ENSURE_TRUE(aSelection && aCancel, NS_ERROR_NULL_POINTER); + + *aCancel = false; + + // Delete mBogusNode if it exists. If we really need one, + // it will be added during post-processing in AfterEditInner(). + + if (mBogusNode) { + mTextEditor->DeleteNode(mBogusNode); + mBogusNode = nullptr; + } + + return NS_OK; +} + +nsresult +HTMLEditRules::WillInsertBreak(Selection& aSelection, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aCancel && aHandled); + *aCancel = false; + *aHandled = false; + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // If the selection isn't collapsed, delete it. + if (!aSelection.Collapsed()) { + nsresult rv = + htmlEditor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip); + NS_ENSURE_SUCCESS(rv, rv); + } + + WillInsert(aSelection, aCancel); + + // Initialize out param. We want to ignore result of WillInsert(). + *aCancel = false; + + // Split any mailcites in the way. Should we abort this if we encounter + // table cell boundaries? + if (IsMailEditor()) { + nsresult rv = SplitMailCites(&aSelection, aHandled); + NS_ENSURE_SUCCESS(rv, rv); + if (*aHandled) { + return NS_OK; + } + } + + // Smart splitting rules + NS_ENSURE_TRUE(aSelection.GetRangeAt(0) && + aSelection.GetRangeAt(0)->GetStartParent(), + NS_ERROR_FAILURE); + OwningNonNull<nsINode> node = *aSelection.GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection.GetRangeAt(0)->StartOffset(); + + // Do nothing if the node is read-only + if (!htmlEditor->IsModifiableNode(node)) { + *aCancel = true; + return NS_OK; + } + + // Identify the block + nsCOMPtr<Element> blockParent = htmlEditor->GetBlock(node); + NS_ENSURE_TRUE(blockParent, NS_ERROR_FAILURE); + + // If the active editing host is an inline element, or if the active editing + // host is the block parent itself, just append a br. + nsCOMPtr<Element> host = htmlEditor->GetActiveEditingHost(); + if (!EditorUtils::IsDescendantOf(blockParent, host)) { + nsresult rv = StandardBreakImpl(node, offset, aSelection); + NS_ENSURE_SUCCESS(rv, rv); + *aHandled = true; + return NS_OK; + } + + // If block is empty, populate with br. (For example, imagine a div that + // contains the word "text". The user selects "text" and types return. + // "Text" is deleted leaving an empty block. We want to put in one br to + // make block have a line. Then code further below will put in a second br.) + bool isEmpty; + IsEmptyBlock(*blockParent, &isEmpty); + if (isEmpty) { + nsCOMPtr<Element> br = htmlEditor->CreateBR(blockParent, + blockParent->Length()); + NS_ENSURE_STATE(br); + } + + nsCOMPtr<Element> listItem = IsInListItem(blockParent); + if (listItem && listItem != host) { + ReturnInListItem(aSelection, *listItem, node, offset); + *aHandled = true; + return NS_OK; + } else if (HTMLEditUtils::IsHeader(*blockParent)) { + // Headers: close (or split) header + ReturnInHeader(aSelection, *blockParent, node, offset); + *aHandled = true; + return NS_OK; + } else if (blockParent->IsHTMLElement(nsGkAtoms::p)) { + // Paragraphs: special rules to look for <br>s + nsresult rv = + ReturnInParagraph(&aSelection, GetAsDOMNode(blockParent), + GetAsDOMNode(node), offset, aCancel, aHandled); + NS_ENSURE_SUCCESS(rv, rv); + // Fall through, we may not have handled it in ReturnInParagraph() + } + + // If not already handled then do the standard thing + if (!(*aHandled)) { + *aHandled = true; + return StandardBreakImpl(node, offset, aSelection); + } + return NS_OK; +} + +nsresult +HTMLEditRules::StandardBreakImpl(nsINode& aNode, + int32_t aOffset, + Selection& aSelection) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + nsCOMPtr<Element> brNode; + bool bAfterBlock = false; + bool bBeforeBlock = false; + nsCOMPtr<nsINode> node = &aNode; + + if (IsPlaintextEditor()) { + brNode = htmlEditor->CreateBR(node, aOffset); + NS_ENSURE_STATE(brNode); + } else { + WSRunObject wsObj(htmlEditor, node, aOffset); + int32_t visOffset = 0; + WSType wsType; + nsCOMPtr<nsINode> visNode; + wsObj.PriorVisibleNode(node, aOffset, address_of(visNode), + &visOffset, &wsType); + if (wsType & WSType::block) { + bAfterBlock = true; + } + wsObj.NextVisibleNode(node, aOffset, address_of(visNode), + &visOffset, &wsType); + if (wsType & WSType::block) { + bBeforeBlock = true; + } + nsCOMPtr<nsIDOMNode> linkDOMNode; + if (htmlEditor->IsInLink(GetAsDOMNode(node), address_of(linkDOMNode))) { + // Split the link + nsCOMPtr<Element> linkNode = do_QueryInterface(linkDOMNode); + NS_ENSURE_STATE(linkNode || !linkDOMNode); + nsCOMPtr<nsINode> linkParent = linkNode->GetParentNode(); + aOffset = htmlEditor->SplitNodeDeep(*linkNode, *node->AsContent(), + aOffset, + HTMLEditor::EmptyContainers::no); + NS_ENSURE_STATE(aOffset != -1); + node = linkParent; + } + brNode = wsObj.InsertBreak(address_of(node), &aOffset, nsIEditor::eNone); + NS_ENSURE_TRUE(brNode, NS_ERROR_FAILURE); + } + node = brNode->GetParentNode(); + NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER); + int32_t offset = node->IndexOf(brNode); + if (bAfterBlock && bBeforeBlock) { + // We just placed a br between block boundaries. This is the one case + // where we want the selection to be before the br we just placed, as the + // br will be on a new line, rather than at end of prior line. + aSelection.SetInterlinePosition(true); + nsresult rv = aSelection.Collapse(node, offset); + NS_ENSURE_SUCCESS(rv, rv); + } else { + WSRunObject wsObj(htmlEditor, node, offset + 1); + nsCOMPtr<nsINode> secondBR; + int32_t visOffset = 0; + WSType wsType; + wsObj.NextVisibleNode(node, offset + 1, address_of(secondBR), + &visOffset, &wsType); + if (wsType == WSType::br) { + // The next thing after the break we inserted is another break. Move the + // second break to be the first break's sibling. This will prevent them + // from being in different inline nodes, which would break + // SetInterlinePosition(). It will also assure that if the user clicks + // away and then clicks back on their new blank line, they will still get + // the style from the line above. + nsCOMPtr<nsINode> brParent = secondBR->GetParentNode(); + int32_t brOffset = brParent ? brParent->IndexOf(secondBR) : -1; + if (brParent != node || brOffset != offset + 1) { + nsresult rv = + htmlEditor->MoveNode(secondBR->AsContent(), node, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + } + } + // SetInterlinePosition(true) means we want the caret to stick to the + // content on the "right". We want the caret to stick to whatever is past + // the break. This is because the break is on the same line we were on, + // but the next content will be on the following line. + + // An exception to this is if the break has a next sibling that is a block + // node. Then we stick to the left to avoid an uber caret. + nsCOMPtr<nsIContent> siblingNode = brNode->GetNextSibling(); + if (siblingNode && IsBlockNode(*siblingNode)) { + aSelection.SetInterlinePosition(false); + } else { + aSelection.SetInterlinePosition(true); + } + nsresult rv = aSelection.Collapse(node, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +nsresult +HTMLEditRules::DidInsertBreak(Selection* aSelection, + nsresult aResult) +{ + return NS_OK; +} + +nsresult +HTMLEditRules::SplitMailCites(Selection* aSelection, + bool* aHandled) +{ + NS_ENSURE_TRUE(aSelection && aHandled, NS_ERROR_NULL_POINTER); + nsCOMPtr<nsIContent> leftCite, rightCite; + nsCOMPtr<nsINode> selNode; + nsCOMPtr<Element> citeNode; + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(aSelection, getter_AddRefs(selNode), + &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + citeNode = GetTopEnclosingMailCite(*selNode); + if (citeNode) { + // If our selection is just before a break, nudge it to be + // just after it. This does two things for us. It saves us the trouble of having to add + // a break here ourselves to preserve the "blockness" of the inline span mailquote + // (in the inline case), and : + // it means the break won't end up making an empty line that happens to be inside a + // mailquote (in either inline or block case). + // The latter can confuse a user if they click there and start typing, + // because being in the mailquote may affect wrapping behavior, or font color, etc. + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject wsObj(mHTMLEditor, selNode, selOffset); + nsCOMPtr<nsINode> visNode; + int32_t visOffset=0; + WSType wsType; + wsObj.NextVisibleNode(selNode, selOffset, address_of(visNode), + &visOffset, &wsType); + if (wsType == WSType::br) { + // ok, we are just before a break. is it inside the mailquote? + if (visNode != citeNode && citeNode->Contains(visNode)) { + // it is. so lets reset our selection to be just after it. + NS_ENSURE_STATE(mHTMLEditor); + selNode = mHTMLEditor->GetNodeLocation(visNode, &selOffset); + ++selOffset; + } + } + + NS_ENSURE_STATE(mHTMLEditor); + NS_ENSURE_STATE(selNode->IsContent()); + int32_t newOffset = mHTMLEditor->SplitNodeDeep(*citeNode, + *selNode->AsContent(), selOffset, HTMLEditor::EmptyContainers::no, + getter_AddRefs(leftCite), getter_AddRefs(rightCite)); + NS_ENSURE_STATE(newOffset != -1); + + // Add an invisible <br> to the end of the left part if it was a <span> of + // style="display: block". This is important, since when serialising the + // cite to plain text, the span which caused the visual break is discarded. + // So the added <br> will guarantee that the serialiser will insert a + // break where the user saw one. + if (leftCite && + leftCite->IsHTMLElement(nsGkAtoms::span) && + leftCite->GetPrimaryFrame()->IsFrameOfType(nsIFrame::eBlockFrame)) { + nsCOMPtr<nsINode> lastChild = leftCite->GetLastChild(); + if (lastChild && !lastChild->IsHTMLElement(nsGkAtoms::br)) { + // We ignore the result here. + nsCOMPtr<Element> invisBR = + mHTMLEditor->CreateBR(leftCite, leftCite->Length()); + } + } + + selNode = citeNode->GetParentNode(); + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> brNode = mHTMLEditor->CreateBR(selNode, newOffset); + NS_ENSURE_STATE(brNode); + + // want selection before the break, and on same line + aSelection->SetInterlinePosition(true); + rv = aSelection->Collapse(selNode, newOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // if citeNode wasn't a block, we might also want another break before it. + // We need to examine the content both before the br we just added and also + // just after it. If we don't have another br or block boundary adjacent, + // then we will need a 2nd br added to achieve blank line that user expects. + if (IsInlineNode(*citeNode)) { + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject wsObj(mHTMLEditor, selNode, newOffset); + nsCOMPtr<nsINode> visNode; + int32_t visOffset=0; + WSType wsType; + wsObj.PriorVisibleNode(selNode, newOffset, address_of(visNode), + &visOffset, &wsType); + if (wsType == WSType::normalWS || wsType == WSType::text || + wsType == WSType::special) { + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject wsObjAfterBR(mHTMLEditor, selNode, newOffset+1); + wsObjAfterBR.NextVisibleNode(selNode, newOffset + 1, + address_of(visNode), &visOffset, &wsType); + if (wsType == WSType::normalWS || wsType == WSType::text || + wsType == WSType::special || + // In case we're at the very end. + wsType == WSType::thisBlock) { + NS_ENSURE_STATE(mHTMLEditor); + brNode = mHTMLEditor->CreateBR(selNode, newOffset); + NS_ENSURE_STATE(brNode); + } + } + } + + // delete any empty cites + bool bEmptyCite = false; + if (leftCite) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->IsEmptyNode(leftCite, &bEmptyCite, true, false); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + if (bEmptyCite) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(leftCite); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } + + if (rightCite) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->IsEmptyNode(rightCite, &bEmptyCite, true, false); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + if (bEmptyCite) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(rightCite); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } + *aHandled = true; + } + return NS_OK; +} + + +nsresult +HTMLEditRules::WillDeleteSelection(Selection* aSelection, + nsIEditor::EDirection aAction, + nsIEditor::EStripWrappers aStripWrappers, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aStripWrappers == nsIEditor::eStrip || + aStripWrappers == nsIEditor::eNoStrip); + + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + // Initialize out params + *aCancel = false; + *aHandled = false; + + // Remember that we did a selection deletion. Used by CreateStyleForInsertText() + mDidDeleteSelection = true; + + // If there is only bogus content, cancel the operation + if (mBogusNode) { + *aCancel = true; + return NS_OK; + } + + // First check for table selection mode. If so, hand off to table editor. + nsCOMPtr<nsIDOMElement> cell; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetFirstSelectedCell(nullptr, getter_AddRefs(cell)); + if (NS_SUCCEEDED(rv) && cell) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteTableCellContents(); + *aHandled = true; + return rv; + } + cell = nullptr; + + // origCollapsed is used later to determine whether we should join blocks. We + // don't really care about bCollapsed because it will be modified by + // ExtendSelectionForDelete later. JoinBlocks should happen if the original + // selection is collapsed and the cursor is at the end of a block element, in + // which case ExtendSelectionForDelete would always make the selection not + // collapsed. + bool bCollapsed = aSelection->Collapsed(); + bool join = false; + bool origCollapsed = bCollapsed; + + nsCOMPtr<nsINode> selNode; + int32_t selOffset; + + NS_ENSURE_STATE(aSelection->GetRangeAt(0)); + nsCOMPtr<nsINode> startNode = aSelection->GetRangeAt(0)->GetStartParent(); + int32_t startOffset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE); + + if (bCollapsed) { + // If we are inside an empty block, delete it. + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> host = mHTMLEditor->GetActiveEditingHost(); + NS_ENSURE_TRUE(host, NS_ERROR_FAILURE); + rv = CheckForEmptyBlock(startNode, host, aSelection, aAction, aHandled); + NS_ENSURE_SUCCESS(rv, rv); + if (*aHandled) { + return NS_OK; + } + + // Test for distance between caret and text that will be deleted + rv = CheckBidiLevelForDeletion(aSelection, GetAsDOMNode(startNode), + startOffset, aAction, aCancel); + NS_ENSURE_SUCCESS(rv, rv); + if (*aCancel) { + return NS_OK; + } + + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->ExtendSelectionForDelete(aSelection, &aAction); + NS_ENSURE_SUCCESS(rv, rv); + + // We should delete nothing. + if (aAction == nsIEditor::eNone) { + return NS_OK; + } + + // ExtendSelectionForDelete() may have changed the selection, update it + NS_ENSURE_STATE(aSelection->GetRangeAt(0)); + startNode = aSelection->GetRangeAt(0)->GetStartParent(); + startOffset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE); + + bCollapsed = aSelection->Collapsed(); + } + + if (bCollapsed) { + // What's in the direction we are deleting? + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject wsObj(mHTMLEditor, startNode, startOffset); + nsCOMPtr<nsINode> visNode; + int32_t visOffset; + WSType wsType; + + // Find next visible node + if (aAction == nsIEditor::eNext) { + wsObj.NextVisibleNode(startNode, startOffset, address_of(visNode), + &visOffset, &wsType); + } else { + wsObj.PriorVisibleNode(startNode, startOffset, address_of(visNode), + &visOffset, &wsType); + } + + if (!visNode) { + // Can't find anything to delete! + *aCancel = true; + // XXX This is the result of mHTMLEditor->GetFirstSelectedCell(). + // The value could be both an error and NS_OK. + return rv; + } + + if (wsType == WSType::normalWS) { + // We found some visible ws to delete. Let ws code handle it. + *aHandled = true; + if (aAction == nsIEditor::eNext) { + rv = wsObj.DeleteWSForward(); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + rv = wsObj.DeleteWSBackward(); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + return InsertBRIfNeeded(aSelection); + } + + if (wsType == WSType::text) { + // Found normal text to delete. + OwningNonNull<Text> nodeAsText = *visNode->GetAsText(); + int32_t so = visOffset; + int32_t eo = visOffset + 1; + if (aAction == nsIEditor::ePrevious) { + if (!so) { + return NS_ERROR_UNEXPECTED; + } + so--; + eo--; + // Bug 1068979: delete both codepoints if surrogate pair + if (so > 0) { + const nsTextFragment *text = nodeAsText->GetText(); + if (NS_IS_LOW_SURROGATE(text->CharAt(so)) && + NS_IS_HIGH_SURROGATE(text->CharAt(so - 1))) { + so--; + } + } + } else { + RefPtr<nsRange> range = aSelection->GetRangeAt(0); + NS_ENSURE_STATE(range); + + NS_ASSERTION(range->GetStartParent() == visNode, + "selection start not in visNode"); + NS_ASSERTION(range->GetEndParent() == visNode, + "selection end not in visNode"); + + so = range->StartOffset(); + eo = range->EndOffset(); + } + NS_ENSURE_STATE(mHTMLEditor); + rv = WSRunObject::PrepareToDeleteRange(mHTMLEditor, address_of(visNode), + &so, address_of(visNode), &eo); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + *aHandled = true; + rv = mHTMLEditor->DeleteText(nodeAsText, std::min(so, eo), + DeprecatedAbs(eo - so)); + NS_ENSURE_SUCCESS(rv, rv); + + // XXX When Backspace key is pressed, Chromium removes following empty + // text nodes when removing the last character of the non-empty text + // node. However, Edge never removes empty text nodes even if + // selection is in the following empty text node(s). For now, we + // should keep our traditional behavior same as Edge for backward + // compatibility. + // XXX When Delete key is pressed, Edge removes all preceding empty + // text nodes when removing the first character of the non-empty + // text node. Chromium removes only selected empty text node and + // following empty text nodes and the first character of the + // non-empty text node. For now, we should keep our traditional + // behavior same as Chromium for backward compatibility. + + DeleteNodeIfCollapsedText(nodeAsText); + + rv = InsertBRIfNeeded(aSelection); + NS_ENSURE_SUCCESS(rv, rv); + + // Remember that we did a ranged delete for the benefit of + // AfterEditInner(). + mDidRangedDelete = true; + + return NS_OK; + } + + if (wsType == WSType::special || wsType == WSType::br || + visNode->IsHTMLElement(nsGkAtoms::hr)) { + // Short circuit for invisible breaks. delete them and recurse. + if (visNode->IsHTMLElement(nsGkAtoms::br) && + (!mHTMLEditor || !mHTMLEditor->IsVisBreak(visNode))) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(visNode); + NS_ENSURE_SUCCESS(rv, rv); + return WillDeleteSelection(aSelection, aAction, aStripWrappers, + aCancel, aHandled); + } + + // Special handling for backspace when positioned after <hr> + if (aAction == nsIEditor::ePrevious && + visNode->IsHTMLElement(nsGkAtoms::hr)) { + // Only if the caret is positioned at the end-of-hr-line position, we + // want to delete the <hr>. + // + // In other words, we only want to delete, if our selection position + // (indicated by startNode and startOffset) is the position directly + // after the <hr>, on the same line as the <hr>. + // + // To detect this case we check: + // startNode == parentOfVisNode + // and + // startOffset -1 == visNodeOffsetToVisNodeParent + // and + // interline position is false (left) + // + // In any other case we set the position to startnode -1 and + // interlineposition to false, only moving the caret to the + // end-of-hr-line position. + bool moveOnly = true; + + selNode = visNode->GetParentNode(); + selOffset = selNode ? selNode->IndexOf(visNode) : -1; + + bool interLineIsRight; + rv = aSelection->GetInterlinePosition(&interLineIsRight); + NS_ENSURE_SUCCESS(rv, rv); + + if (startNode == selNode && startOffset - 1 == selOffset && + !interLineIsRight) { + moveOnly = false; + } + + if (moveOnly) { + // Go to the position after the <hr>, but to the end of the <hr> line + // by setting the interline position to left. + ++selOffset; + aSelection->Collapse(selNode, selOffset); + aSelection->SetInterlinePosition(false); + mDidExplicitlySetInterline = true; + *aHandled = true; + + // There is one exception to the move only case. If the <hr> is + // followed by a <br> we want to delete the <br>. + + WSType otherWSType; + nsCOMPtr<nsINode> otherNode; + int32_t otherOffset; + + wsObj.NextVisibleNode(startNode, startOffset, address_of(otherNode), + &otherOffset, &otherWSType); + + if (otherWSType == WSType::br) { + // Delete the <br> + + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIContent> otherContent(do_QueryInterface(otherNode)); + rv = WSRunObject::PrepareToDeleteNode(mHTMLEditor, otherContent); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(otherNode); + NS_ENSURE_SUCCESS(rv, rv); + } + + return NS_OK; + } + // Else continue with normal delete code + } + + // Found break or image, or hr. + NS_ENSURE_STATE(mHTMLEditor); + NS_ENSURE_STATE(visNode->IsContent()); + rv = WSRunObject::PrepareToDeleteNode(mHTMLEditor, visNode->AsContent()); + NS_ENSURE_SUCCESS(rv, rv); + // Remember sibling to visnode, if any + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIContent> sibling = mHTMLEditor->GetPriorHTMLSibling(visNode); + // Delete the node, and join like nodes if appropriate + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(visNode); + NS_ENSURE_SUCCESS(rv, rv); + // We did something, so let's say so. + *aHandled = true; + // Is there a prior node and are they siblings? + nsCOMPtr<nsINode> stepbrother; + if (sibling) { + NS_ENSURE_STATE(mHTMLEditor); + stepbrother = mHTMLEditor->GetNextHTMLSibling(sibling); + } + // Are they both text nodes? If so, join them! + if (startNode == stepbrother && startNode->GetAsText() && + sibling->GetAsText()) { + EditorDOMPoint pt = JoinNodesSmart(*sibling, *startNode->AsContent()); + NS_ENSURE_STATE(pt.node); + // Fix up selection + rv = aSelection->Collapse(pt.node, pt.offset); + NS_ENSURE_SUCCESS(rv, rv); + } + rv = InsertBRIfNeeded(aSelection); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + + if (wsType == WSType::otherBlock) { + // Make sure it's not a table element. If so, cancel the operation + // (translation: users cannot backspace or delete across table cells) + if (HTMLEditUtils::IsTableElement(visNode)) { + *aCancel = true; + return NS_OK; + } + + // Next to a block. See if we are between a block and a br. If so, we + // really want to delete the br. Else join content at selection to the + // block. + bool bDeletedBR = false; + WSType otherWSType; + nsCOMPtr<nsINode> otherNode; + int32_t otherOffset; + + // Find node in other direction + if (aAction == nsIEditor::eNext) { + wsObj.PriorVisibleNode(startNode, startOffset, address_of(otherNode), + &otherOffset, &otherWSType); + } else { + wsObj.NextVisibleNode(startNode, startOffset, address_of(otherNode), + &otherOffset, &otherWSType); + } + + // First find the adjacent node in the block + nsCOMPtr<nsIContent> leafNode; + nsCOMPtr<nsINode> leftNode, rightNode; + if (aAction == nsIEditor::ePrevious) { + NS_ENSURE_STATE(mHTMLEditor); + leafNode = mHTMLEditor->GetLastEditableLeaf(*visNode); + leftNode = leafNode; + rightNode = startNode; + } else { + NS_ENSURE_STATE(mHTMLEditor); + leafNode = mHTMLEditor->GetFirstEditableLeaf(*visNode); + leftNode = startNode; + rightNode = leafNode; + } + + if (otherNode->IsHTMLElement(nsGkAtoms::br)) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(otherNode); + NS_ENSURE_SUCCESS(rv, rv); + // XXX Only in this case, setting "handled" to true only when it + // succeeds? + *aHandled = true; + bDeletedBR = true; + } + + // Don't cross table boundaries + if (leftNode && rightNode && + InDifferentTableElements(leftNode, rightNode)) { + return NS_OK; + } + + if (bDeletedBR) { + // Put selection at edge of block and we are done. + NS_ENSURE_STATE(leafNode); + EditorDOMPoint newSel = GetGoodSelPointForNode(*leafNode, aAction); + NS_ENSURE_STATE(newSel.node); + aSelection->Collapse(newSel.node, newSel.offset); + return NS_OK; + } + + // Else we are joining content to block + + nsCOMPtr<nsINode> selPointNode = startNode; + int32_t selPointOffset = startOffset; + { + NS_ENSURE_STATE(mHTMLEditor); + AutoTrackDOMPoint tracker(mHTMLEditor->mRangeUpdater, + address_of(selPointNode), &selPointOffset); + NS_ENSURE_STATE(leftNode && leftNode->IsContent() && + rightNode && rightNode->IsContent()); + *aHandled = true; + rv = JoinBlocks(*leftNode->AsContent(), *rightNode->AsContent(), + aCancel); + NS_ENSURE_SUCCESS(rv, rv); + } + aSelection->Collapse(selPointNode, selPointOffset); + return NS_OK; + } + + if (wsType == WSType::thisBlock) { + // At edge of our block. Look beside it and see if we can join to an + // adjacent block + + // Make sure it's not a table element. If so, cancel the operation + // (translation: users cannot backspace or delete across table cells) + if (HTMLEditUtils::IsTableElement(visNode)) { + *aCancel = true; + return NS_OK; + } + + // First find the relevant nodes + nsCOMPtr<nsINode> leftNode, rightNode; + if (aAction == nsIEditor::ePrevious) { + NS_ENSURE_STATE(mHTMLEditor); + leftNode = mHTMLEditor->GetPriorHTMLNode(visNode); + rightNode = startNode; + } else { + NS_ENSURE_STATE(mHTMLEditor); + rightNode = mHTMLEditor->GetNextHTMLNode(visNode); + leftNode = startNode; + } + + // Nothing to join + if (!leftNode || !rightNode) { + *aCancel = true; + return NS_OK; + } + + // Don't cross table boundaries -- cancel it + if (InDifferentTableElements(leftNode, rightNode)) { + *aCancel = true; + return NS_OK; + } + + nsCOMPtr<nsINode> selPointNode = startNode; + int32_t selPointOffset = startOffset; + { + NS_ENSURE_STATE(mHTMLEditor); + AutoTrackDOMPoint tracker(mHTMLEditor->mRangeUpdater, + address_of(selPointNode), &selPointOffset); + NS_ENSURE_STATE(leftNode->IsContent() && rightNode->IsContent()); + *aHandled = true; + rv = JoinBlocks(*leftNode->AsContent(), *rightNode->AsContent(), + aCancel); + NS_ENSURE_SUCCESS(rv, rv); + } + aSelection->Collapse(selPointNode, selPointOffset); + return NS_OK; + } + } + + + // Else we have a non-collapsed selection. First adjust the selection. + rv = ExpandSelectionForDeletion(*aSelection); + NS_ENSURE_SUCCESS(rv, rv); + + // Remember that we did a ranged delete for the benefit of AfterEditInner(). + mDidRangedDelete = true; + + // Refresh start and end points + NS_ENSURE_STATE(aSelection->GetRangeAt(0)); + startNode = aSelection->GetRangeAt(0)->GetStartParent(); + startOffset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE); + nsCOMPtr<nsINode> endNode = aSelection->GetRangeAt(0)->GetEndParent(); + int32_t endOffset = aSelection->GetRangeAt(0)->EndOffset(); + NS_ENSURE_TRUE(endNode, NS_ERROR_FAILURE); + + // Figure out if the endpoints are in nodes that can be merged. Adjust + // surrounding whitespace in preparation to delete selection. + if (!IsPlaintextEditor()) { + NS_ENSURE_STATE(mHTMLEditor); + AutoTransactionsConserveSelection dontSpazMySelection(mHTMLEditor); + rv = WSRunObject::PrepareToDeleteRange(mHTMLEditor, + address_of(startNode), &startOffset, + address_of(endNode), &endOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + + { + // Track location of where we are deleting + NS_ENSURE_STATE(mHTMLEditor); + AutoTrackDOMPoint startTracker(mHTMLEditor->mRangeUpdater, + address_of(startNode), &startOffset); + AutoTrackDOMPoint endTracker(mHTMLEditor->mRangeUpdater, + address_of(endNode), &endOffset); + // We are handling all ranged deletions directly now. + *aHandled = true; + + if (endNode == startNode) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteSelectionImpl(aAction, aStripWrappers); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Figure out mailcite ancestors + nsCOMPtr<Element> startCiteNode = GetTopEnclosingMailCite(*startNode); + nsCOMPtr<Element> endCiteNode = GetTopEnclosingMailCite(*endNode); + + // If we only have a mailcite at one of the two endpoints, set the + // directionality of the deletion so that the selection will end up + // outside the mailcite. + if (startCiteNode && !endCiteNode) { + aAction = nsIEditor::eNext; + } else if (!startCiteNode && endCiteNode) { + aAction = nsIEditor::ePrevious; + } + + // Figure out block parents + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> leftParent = mHTMLEditor->GetBlock(*startNode); + nsCOMPtr<Element> rightParent = mHTMLEditor->GetBlock(*endNode); + + // Are endpoint block parents the same? Use default deletion + if (leftParent && leftParent == rightParent) { + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->DeleteSelectionImpl(aAction, aStripWrappers); + } else { + // Deleting across blocks. Are the blocks of same type? + NS_ENSURE_STATE(leftParent && rightParent); + + // Are the blocks siblings? + nsCOMPtr<nsINode> leftBlockParent = leftParent->GetParentNode(); + nsCOMPtr<nsINode> rightBlockParent = rightParent->GetParentNode(); + + // MOOSE: this could conceivably screw up a table.. fix me. + NS_ENSURE_STATE(mHTMLEditor); + if (leftBlockParent == rightBlockParent && + mHTMLEditor->NodesSameType(GetAsDOMNode(leftParent), + GetAsDOMNode(rightParent)) && + // XXX What's special about these three types of block? + (leftParent->IsHTMLElement(nsGkAtoms::p) || + HTMLEditUtils::IsListItem(leftParent) || + HTMLEditUtils::IsHeader(*leftParent))) { + // First delete the selection + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteSelectionImpl(aAction, aStripWrappers); + NS_ENSURE_SUCCESS(rv, rv); + // Join blocks + NS_ENSURE_STATE(mHTMLEditor); + EditorDOMPoint pt = + mHTMLEditor->JoinNodeDeep(*leftParent, *rightParent); + NS_ENSURE_STATE(pt.node); + // Fix up selection + rv = aSelection->Collapse(pt.node, pt.offset); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + + // Else blocks not same type, or not siblings. Delete everything + // except table elements. + join = true; + + uint32_t rangeCount = aSelection->RangeCount(); + for (uint32_t rangeIdx = 0; rangeIdx < rangeCount; ++rangeIdx) { + OwningNonNull<nsRange> range = *aSelection->GetRangeAt(rangeIdx); + + // Build a list of nodes in the range + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + TrivialFunctor functor; + DOMSubtreeIterator iter; + nsresult rv = iter.Init(*range); + NS_ENSURE_SUCCESS(rv, rv); + iter.AppendList(functor, arrayOfNodes); + + // Now that we have the list, delete non-table elements + int32_t listCount = arrayOfNodes.Length(); + for (int32_t j = 0; j < listCount; j++) { + nsCOMPtr<nsINode> somenode = do_QueryInterface(arrayOfNodes[0]); + NS_ENSURE_STATE(somenode); + DeleteNonTableElements(somenode); + arrayOfNodes.RemoveElementAt(0); + // If something visible is deleted, no need to join. Visible means + // all nodes except non-visible textnodes and breaks. + if (join && origCollapsed) { + if (!somenode->IsContent()) { + join = false; + continue; + } + nsCOMPtr<nsIContent> content = somenode->AsContent(); + if (content->NodeType() == nsIDOMNode::TEXT_NODE) { + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->IsVisTextNode(content, &join, true); + } else { + NS_ENSURE_STATE(mHTMLEditor); + join = content->IsHTMLElement(nsGkAtoms::br) && + !mHTMLEditor->IsVisBreak(somenode); + } + } + } + } + + // Check endpoints for possible text deletion. We can assume that if + // text node is found, we can delete to end or to begining as + // appropriate, since the case where both sel endpoints in same text + // node was already handled (we wouldn't be here) + if (startNode->GetAsText() && + startNode->Length() > static_cast<uint32_t>(startOffset)) { + // Delete to last character + OwningNonNull<nsGenericDOMDataNode> dataNode = + *static_cast<nsGenericDOMDataNode*>(startNode.get()); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteText(dataNode, startOffset, + startNode->Length() - startOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + if (endNode->GetAsText() && endOffset) { + // Delete to first character + NS_ENSURE_STATE(mHTMLEditor); + OwningNonNull<nsGenericDOMDataNode> dataNode = + *static_cast<nsGenericDOMDataNode*>(endNode.get()); + rv = mHTMLEditor->DeleteText(dataNode, 0, endOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + + if (join) { + rv = JoinBlocks(*leftParent, *rightParent, aCancel); + NS_ENSURE_SUCCESS(rv, rv); + } + } + } + } + + // We might have left only collapsed whitespace in the start/end nodes + { + AutoTrackDOMPoint startTracker(mHTMLEditor->mRangeUpdater, + address_of(startNode), &startOffset); + AutoTrackDOMPoint endTracker(mHTMLEditor->mRangeUpdater, + address_of(endNode), &endOffset); + + DeleteNodeIfCollapsedText(*startNode); + DeleteNodeIfCollapsedText(*endNode); + } + + // If we're joining blocks: if deleting forward the selection should be + // collapsed to the end of the selection, if deleting backward the selection + // should be collapsed to the beginning of the selection. But if we're not + // joining then the selection should collapse to the beginning of the + // selection if we'redeleting forward, because the end of the selection will + // still be in the next block. And same thing for deleting backwards + // (selection should collapse to the end, because the beginning will still be + // in the first block). See Bug 507936 + if (aAction == (join ? nsIEditor::eNext : nsIEditor::ePrevious)) { + rv = aSelection->Collapse(endNode, endOffset); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + rv = aSelection->Collapse(startNode, startOffset); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + return NS_OK; +} + +/** + * If aNode is a text node that contains only collapsed whitespace, delete it. + * It doesn't serve any useful purpose, and we don't want it to confuse code + * that doesn't correctly skip over it. + * + * If deleting the node fails (like if it's not editable), the caller should + * proceed as usual, so don't return any errors. + */ +void +HTMLEditRules::DeleteNodeIfCollapsedText(nsINode& aNode) +{ + if (!aNode.GetAsText()) { + return; + } + bool empty; + nsresult rv = mHTMLEditor->IsVisTextNode(aNode.AsContent(), &empty, false); + NS_ENSURE_SUCCESS_VOID(rv); + if (empty) { + mHTMLEditor->DeleteNode(&aNode); + } +} + + +/** + * InsertBRIfNeeded() determines if a br is needed for current selection to not + * be spastic. If so, it inserts one. Callers responsibility to only call + * with collapsed selection. + * + * @param aSelection The collapsed selection. + */ +nsresult +HTMLEditRules::InsertBRIfNeeded(Selection* aSelection) +{ + NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER); + + // get selection + nsCOMPtr<nsINode> node; + int32_t offset; + nsresult rv = + mTextEditor->GetStartNodeAndOffset(aSelection, + getter_AddRefs(node), &offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_TRUE(node, NS_ERROR_FAILURE); + + // inline elements don't need any br + if (!IsBlockNode(*node)) { + return NS_OK; + } + + // examine selection + NS_ENSURE_STATE(mHTMLEditor); + WSRunObject wsObj(mHTMLEditor, node, offset); + if (((wsObj.mStartReason & WSType::block) || + (wsObj.mStartReason & WSType::br)) && + (wsObj.mEndReason & WSType::block)) { + // if we are tucked between block boundaries then insert a br + // first check that we are allowed to + NS_ENSURE_STATE(mHTMLEditor); + if (mHTMLEditor->CanContainTag(*node, *nsGkAtoms::br)) { + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> br = + mHTMLEditor->CreateBR(node, offset, nsIEditor::ePrevious); + return br ? NS_OK : NS_ERROR_FAILURE; + } + } + return NS_OK; +} + +/** + * GetGoodSelPointForNode() finds where at a node you would want to set the + * selection if you were trying to have a caret next to it. Always returns a + * valid value (unless mHTMLEditor has gone away). + * + * @param aNode The node + * @param aAction Which edge to find: + * eNext/eNextWord/eToEndOfLine indicates beginning, + * ePrevious/PreviousWord/eToBeginningOfLine ending. + */ +EditorDOMPoint +HTMLEditRules::GetGoodSelPointForNode(nsINode& aNode, + nsIEditor::EDirection aAction) +{ + MOZ_ASSERT(aAction == nsIEditor::eNext || + aAction == nsIEditor::eNextWord || + aAction == nsIEditor::ePrevious || + aAction == nsIEditor::ePreviousWord || + aAction == nsIEditor::eToBeginningOfLine || + aAction == nsIEditor::eToEndOfLine); + + bool isPreviousAction = (aAction == nsIEditor::ePrevious || + aAction == nsIEditor::ePreviousWord || + aAction == nsIEditor::eToBeginningOfLine); + + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + if (aNode.GetAsText() || mHTMLEditor->IsContainer(&aNode) || + NS_WARN_IF(!aNode.GetParentNode())) { + return EditorDOMPoint(&aNode, isPreviousAction ? aNode.Length() : 0); + } + + EditorDOMPoint ret; + ret.node = aNode.GetParentNode(); + ret.offset = ret.node ? ret.node->IndexOf(&aNode) : -1; + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + if ((!aNode.IsHTMLElement(nsGkAtoms::br) || + mHTMLEditor->IsVisBreak(&aNode)) && isPreviousAction) { + ret.offset++; + } + return ret; +} + + +/** + * This method is used to join two block elements. The right element is always + * joined to the left element. If the elements are the same type and not + * nested within each other, JoinNodesSmart is called (example, joining two + * list items together into one). If the elements are not the same type, or + * one is a descendant of the other, we instead destroy the right block placing + * its children into leftblock. DTD containment rules are followed throughout. + */ +nsresult +HTMLEditRules::JoinBlocks(nsIContent& aLeftNode, + nsIContent& aRightNode, + bool* aCanceled) +{ + MOZ_ASSERT(aCanceled); + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + nsCOMPtr<Element> leftBlock = htmlEditor->GetBlock(aLeftNode); + nsCOMPtr<Element> rightBlock = htmlEditor->GetBlock(aRightNode); + + // Sanity checks + NS_ENSURE_TRUE(leftBlock && rightBlock, NS_ERROR_NULL_POINTER); + NS_ENSURE_STATE(leftBlock != rightBlock); + + if (HTMLEditUtils::IsTableElement(leftBlock) || + HTMLEditUtils::IsTableElement(rightBlock)) { + // Do not try to merge table elements + *aCanceled = true; + return NS_OK; + } + + // Make sure we don't try to move things into HR's, which look like blocks + // but aren't containers + if (leftBlock->IsHTMLElement(nsGkAtoms::hr)) { + leftBlock = htmlEditor->GetBlockNodeParent(leftBlock); + } + if (rightBlock->IsHTMLElement(nsGkAtoms::hr)) { + rightBlock = htmlEditor->GetBlockNodeParent(rightBlock); + } + NS_ENSURE_STATE(leftBlock && rightBlock); + + // Bail if both blocks the same + if (leftBlock == rightBlock) { + *aCanceled = true; + return NS_OK; + } + + // Joining a list item to its parent is a NOP. + if (HTMLEditUtils::IsList(leftBlock) && + HTMLEditUtils::IsListItem(rightBlock) && + rightBlock->GetParentNode() == leftBlock) { + return NS_OK; + } + + // Special rule here: if we are trying to join list items, and they are in + // different lists, join the lists instead. + bool mergeLists = false; + nsIAtom* existingList = nsGkAtoms::_empty; + int32_t offset; + nsCOMPtr<Element> leftList, rightList; + if (HTMLEditUtils::IsListItem(leftBlock) && + HTMLEditUtils::IsListItem(rightBlock)) { + leftList = leftBlock->GetParentElement(); + rightList = rightBlock->GetParentElement(); + if (leftList && rightList && leftList != rightList && + !EditorUtils::IsDescendantOf(leftList, rightBlock, &offset) && + !EditorUtils::IsDescendantOf(rightList, leftBlock, &offset)) { + // There are some special complications if the lists are descendants of + // the other lists' items. Note that it is okay for them to be + // descendants of the other lists themselves, which is the usual case for + // sublists in our implementation. + leftBlock = leftList; + rightBlock = rightList; + mergeLists = true; + existingList = leftList->NodeInfo()->NameAtom(); + } + } + + AutoTransactionsConserveSelection dontSpazMySelection(htmlEditor); + + int32_t rightOffset = 0; + int32_t leftOffset = -1; + + // offset below is where you find yourself in rightBlock when you traverse + // upwards from leftBlock + if (EditorUtils::IsDescendantOf(leftBlock, rightBlock, &rightOffset)) { + // Tricky case. Left block is inside right block. Do ws adjustment. This + // just destroys non-visible ws at boundaries we will be joining. + rightOffset++; + nsresult rv = WSRunObject::ScrubBlockBoundary(htmlEditor, + WSRunObject::kBlockEnd, + leftBlock); + NS_ENSURE_SUCCESS(rv, rv); + + { + // We can't just track rightBlock because it's an Element. + nsCOMPtr<nsINode> trackingRightBlock(rightBlock); + AutoTrackDOMPoint tracker(htmlEditor->mRangeUpdater, + address_of(trackingRightBlock), &rightOffset); + rv = WSRunObject::ScrubBlockBoundary(htmlEditor, + WSRunObject::kAfterBlock, + rightBlock, rightOffset); + NS_ENSURE_SUCCESS(rv, rv); + if (trackingRightBlock->IsElement()) { + rightBlock = trackingRightBlock->AsElement(); + } else { + NS_ENSURE_STATE(trackingRightBlock->GetParentElement()); + rightBlock = trackingRightBlock->GetParentElement(); + } + } + // Do br adjustment. + nsCOMPtr<Element> brNode = + CheckForInvisibleBR(*leftBlock, BRLocation::blockEnd); + if (mergeLists) { + // The idea here is to take all children in rightList that are past + // offset, and pull them into leftlist. + for (nsCOMPtr<nsIContent> child = rightList->GetChildAt(offset); + child; child = rightList->GetChildAt(rightOffset)) { + rv = htmlEditor->MoveNode(child, leftList, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + } else { + MoveBlock(*leftBlock, *rightBlock, leftOffset, rightOffset); + } + if (brNode) { + htmlEditor->DeleteNode(brNode); + } + // Offset below is where you find yourself in leftBlock when you traverse + // upwards from rightBlock + } else if (EditorUtils::IsDescendantOf(rightBlock, leftBlock, &leftOffset)) { + // Tricky case. Right block is inside left block. Do ws adjustment. This + // just destroys non-visible ws at boundaries we will be joining. + nsresult rv = WSRunObject::ScrubBlockBoundary(htmlEditor, + WSRunObject::kBlockStart, + rightBlock); + NS_ENSURE_SUCCESS(rv, rv); + { + // We can't just track leftBlock because it's an Element, so track + // something else. + nsCOMPtr<nsINode> trackingLeftBlock(leftBlock); + AutoTrackDOMPoint tracker(htmlEditor->mRangeUpdater, + address_of(trackingLeftBlock), &leftOffset); + rv = WSRunObject::ScrubBlockBoundary(htmlEditor, + WSRunObject::kBeforeBlock, + leftBlock, leftOffset); + NS_ENSURE_SUCCESS(rv, rv); + if (trackingLeftBlock->IsElement()) { + leftBlock = trackingLeftBlock->AsElement(); + } else { + NS_ENSURE_STATE(trackingLeftBlock->GetParentElement()); + leftBlock = trackingLeftBlock->GetParentElement(); + } + } + // Do br adjustment. + nsCOMPtr<Element> brNode = + CheckForInvisibleBR(*leftBlock, BRLocation::beforeBlock, leftOffset); + if (mergeLists) { + MoveContents(*rightList, *leftList, &leftOffset); + } else { + // Left block is a parent of right block, and the parent of the previous + // visible content. Right block is a child and contains the contents we + // want to move. + + int32_t previousContentOffset; + nsCOMPtr<nsINode> previousContentParent; + + if (&aLeftNode == leftBlock) { + // We are working with valid HTML, aLeftNode is a block node, and is + // therefore allowed to contain rightBlock. This is the simple case, + // we will simply move the content in rightBlock out of its block. + previousContentParent = leftBlock; + previousContentOffset = leftOffset; + } else { + // We try to work as well as possible with HTML that's already invalid. + // Although "right block" is a block, and a block must not be contained + // in inline elements, reality is that broken documents do exist. The + // DIRECT parent of "left NODE" might be an inline element. Previous + // versions of this code skipped inline parents until the first block + // parent was found (and used "left block" as the destination). + // However, in some situations this strategy moves the content to an + // unexpected position. (see bug 200416) The new idea is to make the + // moving content a sibling, next to the previous visible content. + + previousContentParent = aLeftNode.GetParentNode(); + previousContentOffset = previousContentParent ? + previousContentParent->IndexOf(&aLeftNode) : -1; + + // We want to move our content just after the previous visible node. + previousContentOffset++; + } + + // Because we don't want the moving content to receive the style of the + // previous content, we split the previous content's style. + + nsCOMPtr<Element> editorRoot = htmlEditor->GetEditorRoot(); + if (!editorRoot || &aLeftNode != editorRoot) { + nsCOMPtr<nsIContent> splittedPreviousContent; + rv = htmlEditor->SplitStyleAbovePoint( + address_of(previousContentParent), + &previousContentOffset, + nullptr, nullptr, nullptr, + getter_AddRefs(splittedPreviousContent)); + NS_ENSURE_SUCCESS(rv, rv); + + if (splittedPreviousContent) { + previousContentParent = splittedPreviousContent->GetParentNode(); + previousContentOffset = previousContentParent ? + previousContentParent->IndexOf(splittedPreviousContent) : -1; + } + } + + NS_ENSURE_TRUE(previousContentParent, NS_ERROR_NULL_POINTER); + + rv = MoveBlock(*previousContentParent->AsElement(), *rightBlock, + previousContentOffset, rightOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + if (brNode) { + htmlEditor->DeleteNode(brNode); + } + } else { + // Normal case. Blocks are siblings, or at least close enough. An example + // of the latter is <p>paragraph</p><ul><li>one<li>two<li>three</ul>. The + // first li and the p are not true siblings, but we still want to join them + // if you backspace from li into p. + + // Adjust whitespace at block boundaries + nsresult rv = + WSRunObject::PrepareToJoinBlocks(htmlEditor, leftBlock, rightBlock); + NS_ENSURE_SUCCESS(rv, rv); + // Do br adjustment. + nsCOMPtr<Element> brNode = + CheckForInvisibleBR(*leftBlock, BRLocation::blockEnd); + if (mergeLists || leftBlock->NodeInfo()->NameAtom() == + rightBlock->NodeInfo()->NameAtom()) { + // Nodes are same type. merge them. + EditorDOMPoint pt = JoinNodesSmart(*leftBlock, *rightBlock); + if (pt.node && mergeLists) { + nsCOMPtr<Element> newBlock; + ConvertListType(rightBlock, getter_AddRefs(newBlock), + existingList, nsGkAtoms::li); + } + } else { + // Nodes are dissimilar types. + rv = MoveBlock(*leftBlock, *rightBlock, leftOffset, rightOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + if (brNode) { + rv = htmlEditor->DeleteNode(brNode); + NS_ENSURE_SUCCESS(rv, rv); + } + } + return NS_OK; +} + + +/** + * Moves the content from aRightBlock starting from aRightOffset into + * aLeftBlock at aLeftOffset. Note that the "block" might merely be inline + * nodes between <br>s, or between blocks, etc. DTD containment rules are + * followed throughout. + */ +nsresult +HTMLEditRules::MoveBlock(Element& aLeftBlock, + Element& aRightBlock, + int32_t aLeftOffset, + int32_t aRightOffset) +{ + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + // GetNodesFromPoint is the workhorse that figures out what we wnat to move. + nsresult rv = GetNodesFromPoint(EditorDOMPoint(&aRightBlock, aRightOffset), + EditAction::makeList, arrayOfNodes, + TouchContent::yes); + NS_ENSURE_SUCCESS(rv, rv); + for (uint32_t i = 0; i < arrayOfNodes.Length(); i++) { + // get the node to act on + if (IsBlockNode(arrayOfNodes[i])) { + // For block nodes, move their contents only, then delete block. + rv = MoveContents(*arrayOfNodes[i]->AsElement(), aLeftBlock, + &aLeftOffset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(arrayOfNodes[i]); + } else { + // Otherwise move the content as is, checking against the DTD. + rv = MoveNodeSmart(*arrayOfNodes[i]->AsContent(), aLeftBlock, + &aLeftOffset); + } + } + + // XXX We're only checking return value of the last iteration + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; +} + +/** + * This method is used to move node aNode to (aDestElement, aInOutDestOffset). + * DTD containment rules are followed throughout. aInOutDestOffset is updated + * to point _after_ inserted content. + */ +nsresult +HTMLEditRules::MoveNodeSmart(nsIContent& aNode, + Element& aDestElement, + int32_t* aInOutDestOffset) +{ + MOZ_ASSERT(aInOutDestOffset); + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Check if this node can go into the destination node + if (htmlEditor->CanContain(aDestElement, aNode)) { + // If it can, move it there + nsresult rv = + htmlEditor->MoveNode(&aNode, &aDestElement, *aInOutDestOffset); + NS_ENSURE_SUCCESS(rv, rv); + if (*aInOutDestOffset != -1) { + (*aInOutDestOffset)++; + } + } else { + // If it can't, move its children (if any), and then delete it. + if (aNode.IsElement()) { + nsresult rv = + MoveContents(*aNode.AsElement(), aDestElement, aInOutDestOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + + nsresult rv = htmlEditor->DeleteNode(&aNode); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +/** + * Moves the _contents_ of aElement to (aDestElement, aInOutDestOffset). DTD + * containment rules are followed throughout. aInOutDestOffset is updated to + * point _after_ inserted content. + */ +nsresult +HTMLEditRules::MoveContents(Element& aElement, + Element& aDestElement, + int32_t* aInOutDestOffset) +{ + MOZ_ASSERT(aInOutDestOffset); + + NS_ENSURE_TRUE(&aElement != &aDestElement, NS_ERROR_ILLEGAL_VALUE); + + while (aElement.GetFirstChild()) { + nsresult rv = MoveNodeSmart(*aElement.GetFirstChild(), aDestElement, + aInOutDestOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + + +nsresult +HTMLEditRules::DeleteNonTableElements(nsINode* aNode) +{ + MOZ_ASSERT(aNode); + if (!HTMLEditUtils::IsTableElementButNotTable(aNode)) { + NS_ENSURE_STATE(mHTMLEditor); + return mHTMLEditor->DeleteNode(aNode->AsDOMNode()); + } + + for (int32_t i = aNode->GetChildCount() - 1; i >= 0; --i) { + nsresult rv = DeleteNonTableElements(aNode->GetChildAt(i)); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +nsresult +HTMLEditRules::DidDeleteSelection(Selection* aSelection, + nsIEditor::EDirection aDir, + nsresult aResult) +{ + if (!aSelection) { + return NS_ERROR_NULL_POINTER; + } + + // find where we are + nsCOMPtr<nsINode> startNode; + int32_t startOffset; + nsresult rv = mTextEditor->GetStartNodeAndOffset(aSelection, + getter_AddRefs(startNode), + &startOffset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE); + + // find any enclosing mailcite + nsCOMPtr<Element> citeNode = GetTopEnclosingMailCite(*startNode); + if (citeNode) { + bool isEmpty = true, seenBR = false; + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->IsEmptyNodeImpl(citeNode, &isEmpty, true, true, false, + &seenBR); + if (isEmpty) { + int32_t offset; + nsCOMPtr<nsINode> parent = EditorBase::GetNodeLocation(citeNode, &offset); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(citeNode); + NS_ENSURE_SUCCESS(rv, rv); + if (parent && seenBR) { + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> brNode = mHTMLEditor->CreateBR(parent, offset); + NS_ENSURE_STATE(brNode); + aSelection->Collapse(parent, offset); + } + } + } + + // call through to base class + return TextEditRules::DidDeleteSelection(aSelection, aDir, aResult); +} + +nsresult +HTMLEditRules::WillMakeList(Selection* aSelection, + const nsAString* aListType, + bool aEntireList, + const nsAString* aBulletType, + bool* aCancel, + bool* aHandled, + const nsAString* aItemType) +{ + if (!aSelection || !aListType || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + OwningNonNull<nsIAtom> listType = NS_Atomize(*aListType); + + WillInsert(*aSelection, aCancel); + + // initialize out param + // we want to ignore result of WillInsert() + *aCancel = false; + *aHandled = false; + + // deduce what tag to use for list items + nsCOMPtr<nsIAtom> itemType; + if (aItemType) { + itemType = NS_Atomize(*aItemType); + NS_ENSURE_TRUE(itemType, NS_ERROR_OUT_OF_MEMORY); + } else if (listType == nsGkAtoms::dl) { + itemType = nsGkAtoms::dd; + } else { + itemType = nsGkAtoms::li; + } + + // convert the selection ranges into "promoted" selection ranges: + // this basically just expands the range to include the immediate + // block parent, and then further expands to include any ancestors + // whose children are all in the range + + *aHandled = true; + + nsresult rv = NormalizeSelection(aSelection); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + AutoSelectionRestorer selectionRestorer(aSelection, mHTMLEditor); + + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + rv = GetListActionNodes(arrayOfNodes, + aEntireList ? EntireList::yes : EntireList::no); + NS_ENSURE_SUCCESS(rv, rv); + + // check if all our nodes are <br>s, or empty inlines + bool bOnlyBreaks = true; + for (auto& curNode : arrayOfNodes) { + // if curNode is not a Break or empty inline, we're done + if (!TextEditUtils::IsBreak(curNode) && + !IsEmptyInline(curNode)) { + bOnlyBreaks = false; + break; + } + } + + // if no nodes, we make empty list. Ditto if the user tried to make a list + // of some # of breaks. + if (arrayOfNodes.IsEmpty() || bOnlyBreaks) { + // if only breaks, delete them + if (bOnlyBreaks) { + for (auto& node : arrayOfNodes) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(node); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + // get selection location + NS_ENSURE_STATE(aSelection->RangeCount()); + nsCOMPtr<nsINode> parent = aSelection->GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_STATE(parent); + + // make sure we can put a list here + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->CanContainTag(*parent, listType)) { + *aCancel = true; + return NS_OK; + } + rv = SplitAsNeeded(listType, parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> theList = + mHTMLEditor->CreateNode(listType, parent, offset); + NS_ENSURE_STATE(theList); + + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> theListItem = + mHTMLEditor->CreateNode(itemType, theList, 0); + NS_ENSURE_STATE(theListItem); + + // remember our new block for postprocessing + mNewBlock = theListItem; + // put selection in new list item + *aHandled = true; + rv = aSelection->Collapse(theListItem, 0); + // Don't restore the selection + selectionRestorer.Abort(); + return rv; + } + + // if there is only one node in the array, and it is a list, div, or + // blockquote, then look inside of it until we find inner list or content. + + LookInsideDivBQandList(arrayOfNodes); + + // Ok, now go through all the nodes and put then in the list, + // or whatever is approriate. Wohoo! + + uint32_t listCount = arrayOfNodes.Length(); + nsCOMPtr<nsINode> curParent; + nsCOMPtr<Element> curList, prevListItem; + + for (uint32_t i = 0; i < listCount; i++) { + // here's where we actually figure out what to do + nsCOMPtr<Element> newBlock; + NS_ENSURE_STATE(arrayOfNodes[i]->IsContent()); + OwningNonNull<nsIContent> curNode = *arrayOfNodes[i]->AsContent(); + int32_t offset; + curParent = EditorBase::GetNodeLocation(curNode, &offset); + + // make sure we don't assemble content that is in different table cells + // into the same list. respect table cell boundaries when listifying. + if (curList && InDifferentTableElements(curList, curNode)) { + curList = nullptr; + } + + // if curNode is a Break, delete it, and quit remembering prev list item + if (TextEditUtils::IsBreak(curNode)) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + prevListItem = nullptr; + continue; + } else if (IsEmptyInline(curNode)) { + // if curNode is an empty inline container, delete it + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + + if (HTMLEditUtils::IsList(curNode)) { + // do we have a curList already? + if (curList && !EditorUtils::IsDescendantOf(curNode, curList)) { + // move all of our children into curList. cheezy way to do it: move + // whole list and then RemoveContainer() on the list. ConvertListType + // first: that routine handles converting the list item types, if + // needed + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + rv = ConvertListType(curNode->AsElement(), getter_AddRefs(newBlock), + listType, itemType); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->RemoveBlockContainer(*newBlock); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // replace list with new list type + rv = ConvertListType(curNode->AsElement(), getter_AddRefs(newBlock), + listType, itemType); + NS_ENSURE_SUCCESS(rv, rv); + curList = newBlock; + } + prevListItem = nullptr; + continue; + } + + if (HTMLEditUtils::IsListItem(curNode)) { + NS_ENSURE_STATE(mHTMLEditor); + if (!curParent->IsHTMLElement(listType)) { + // list item is in wrong type of list. if we don't have a curList, + // split the old list and make a new list of correct type. + if (!curList || EditorUtils::IsDescendantOf(curNode, curList)) { + NS_ENSURE_STATE(mHTMLEditor); + NS_ENSURE_STATE(curParent->IsContent()); + ErrorResult rv; + nsCOMPtr<nsIContent> splitNode = + mHTMLEditor->SplitNode(*curParent->AsContent(), offset, rv); + NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult()); + newBlock = splitNode ? splitNode->AsElement() : nullptr; + int32_t offset; + nsCOMPtr<nsINode> parent = EditorBase::GetNodeLocation(curParent, + &offset); + NS_ENSURE_STATE(mHTMLEditor); + curList = mHTMLEditor->CreateNode(listType, parent, offset); + NS_ENSURE_STATE(curList); + } + // move list item to new list + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + // convert list item type if needed + NS_ENSURE_STATE(mHTMLEditor); + if (!curNode->IsHTMLElement(itemType)) { + NS_ENSURE_STATE(mHTMLEditor); + newBlock = mHTMLEditor->ReplaceContainer(curNode->AsElement(), + itemType); + NS_ENSURE_STATE(newBlock); + } + } else { + // item is in right type of list. But we might still have to move it. + // and we might need to convert list item types. + if (!curList) { + curList = curParent->AsElement(); + } else if (curParent != curList) { + // move list item to new list + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + NS_ENSURE_STATE(mHTMLEditor); + if (!curNode->IsHTMLElement(itemType)) { + NS_ENSURE_STATE(mHTMLEditor); + newBlock = mHTMLEditor->ReplaceContainer(curNode->AsElement(), + itemType); + NS_ENSURE_STATE(newBlock); + } + } + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIDOMElement> curElement = do_QueryInterface(curNode); + NS_NAMED_LITERAL_STRING(typestr, "type"); + if (aBulletType && !aBulletType->IsEmpty()) { + rv = mHTMLEditor->SetAttribute(curElement, typestr, *aBulletType); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + rv = mHTMLEditor->RemoveAttribute(curElement, typestr); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + continue; + } + + // if we hit a div clear our prevListItem, insert divs contents + // into our node array, and remove the div + if (curNode->IsHTMLElement(nsGkAtoms::div)) { + prevListItem = nullptr; + int32_t j = i + 1; + GetInnerContent(*curNode, arrayOfNodes, &j); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->RemoveContainer(curNode); + NS_ENSURE_SUCCESS(rv, rv); + listCount = arrayOfNodes.Length(); + continue; + } + + // need to make a list to put things in if we haven't already, + if (!curList) { + rv = SplitAsNeeded(listType, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curList = mHTMLEditor->CreateNode(listType, curParent, offset); + // remember our new block for postprocessing + mNewBlock = curList; + // curList is now the correct thing to put curNode in + prevListItem = nullptr; + } + + // if curNode isn't a list item, we must wrap it in one + nsCOMPtr<Element> listItem; + if (!HTMLEditUtils::IsListItem(curNode)) { + if (IsInlineNode(curNode) && prevListItem) { + // this is a continuation of some inline nodes that belong together in + // the same list item. use prevListItem + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, prevListItem, -1); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // don't wrap li around a paragraph. instead replace paragraph with li + if (curNode->IsHTMLElement(nsGkAtoms::p)) { + NS_ENSURE_STATE(mHTMLEditor); + listItem = mHTMLEditor->ReplaceContainer(curNode->AsElement(), + itemType); + NS_ENSURE_STATE(listItem); + } else { + NS_ENSURE_STATE(mHTMLEditor); + listItem = mHTMLEditor->InsertContainerAbove(curNode, itemType); + NS_ENSURE_STATE(listItem); + } + if (IsInlineNode(curNode)) { + prevListItem = listItem; + } else { + prevListItem = nullptr; + } + } + } else { + listItem = curNode->AsElement(); + } + + if (listItem) { + // if we made a new list item, deal with it: tuck the listItem into the + // end of the active list + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(listItem, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + return NS_OK; +} + + +nsresult +HTMLEditRules::WillRemoveList(Selection* aSelection, + bool aOrdered, + bool* aCancel, + bool* aHandled) +{ + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + // initialize out param + *aCancel = false; + *aHandled = true; + + nsresult rv = NormalizeSelection(aSelection); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + AutoSelectionRestorer selectionRestorer(aSelection, mHTMLEditor); + + nsTArray<RefPtr<nsRange>> arrayOfRanges; + GetPromotedRanges(*aSelection, arrayOfRanges, EditAction::makeList); + + // use these ranges to contruct a list of nodes to act on. + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + rv = GetListActionNodes(arrayOfNodes, EntireList::no); + NS_ENSURE_SUCCESS(rv, rv); + + // Remove all non-editable nodes. Leave them be. + for (int32_t i = arrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> testNode = arrayOfNodes[i]; + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsEditable(testNode)) { + arrayOfNodes.RemoveElementAt(i); + } + } + + // Only act on lists or list items in the array + for (auto& curNode : arrayOfNodes) { + // here's where we actually figure out what to do + if (HTMLEditUtils::IsListItem(curNode)) { + // unlist this listitem + bool bOutOfList; + do { + rv = PopListItem(GetAsDOMNode(curNode), &bOutOfList); + NS_ENSURE_SUCCESS(rv, rv); + } while (!bOutOfList); // keep popping it out until it's not in a list anymore + } else if (HTMLEditUtils::IsList(curNode)) { + // node is a list, move list items out + rv = RemoveListStructure(*curNode->AsElement()); + NS_ENSURE_SUCCESS(rv, rv); + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::WillMakeDefListItem(Selection* aSelection, + const nsAString *aItemType, + bool aEntireList, + bool* aCancel, + bool* aHandled) +{ + // for now we let WillMakeList handle this + NS_NAMED_LITERAL_STRING(listType, "dl"); + return WillMakeList(aSelection, &listType, aEntireList, nullptr, aCancel, aHandled, aItemType); +} + +nsresult +HTMLEditRules::WillMakeBasicBlock(Selection& aSelection, + const nsAString& aBlockType, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aCancel && aHandled); + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + OwningNonNull<nsIAtom> blockType = NS_Atomize(aBlockType); + + WillInsert(aSelection, aCancel); + // We want to ignore result of WillInsert() + *aCancel = false; + *aHandled = false; + + nsresult rv = NormalizeSelection(&aSelection); + NS_ENSURE_SUCCESS(rv, rv); + AutoSelectionRestorer selectionRestorer(&aSelection, htmlEditor); + AutoTransactionsConserveSelection dontSpazMySelection(htmlEditor); + *aHandled = true; + + // Contruct a list of nodes to act on. + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + rv = GetNodesFromSelection(aSelection, EditAction::makeBasicBlock, + arrayOfNodes); + NS_ENSURE_SUCCESS(rv, rv); + + // Remove all non-editable nodes. Leave them be. + for (int32_t i = arrayOfNodes.Length() - 1; i >= 0; i--) { + if (!htmlEditor->IsEditable(arrayOfNodes[i])) { + arrayOfNodes.RemoveElementAt(i); + } + } + + // If nothing visible in list, make an empty block + if (ListIsEmptyLine(arrayOfNodes)) { + // Get selection location + NS_ENSURE_STATE(aSelection.GetRangeAt(0) && + aSelection.GetRangeAt(0)->GetStartParent()); + OwningNonNull<nsINode> parent = + *aSelection.GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection.GetRangeAt(0)->StartOffset(); + + if (blockType == nsGkAtoms::normal || + blockType == nsGkAtoms::_empty) { + // We are removing blocks (going to "body text") + NS_ENSURE_TRUE(htmlEditor->GetBlock(parent), NS_ERROR_NULL_POINTER); + OwningNonNull<Element> curBlock = *htmlEditor->GetBlock(parent); + if (HTMLEditUtils::IsFormatNode(curBlock)) { + // If the first editable node after selection is a br, consume it. + // Otherwise it gets pushed into a following block after the split, + // which is visually bad. + nsCOMPtr<nsIContent> brNode = + htmlEditor->GetNextHTMLNode(parent, offset); + if (brNode && brNode->IsHTMLElement(nsGkAtoms::br)) { + rv = htmlEditor->DeleteNode(brNode); + NS_ENSURE_SUCCESS(rv, rv); + } + // Do the splits! + offset = htmlEditor->SplitNodeDeep(curBlock, *parent->AsContent(), + offset, + HTMLEditor::EmptyContainers::no); + NS_ENSURE_STATE(offset != -1); + // Put a br at the split point + brNode = htmlEditor->CreateBR(curBlock->GetParentNode(), offset); + NS_ENSURE_STATE(brNode); + // Put selection at the split point + *aHandled = true; + rv = aSelection.Collapse(curBlock->GetParentNode(), offset); + // Don't restore the selection + selectionRestorer.Abort(); + NS_ENSURE_SUCCESS(rv, rv); + } + // Else nothing to do! + } else { + // We are making a block. Consume a br, if needed. + nsCOMPtr<nsIContent> brNode = + htmlEditor->GetNextHTMLNode(parent, offset, true); + if (brNode && brNode->IsHTMLElement(nsGkAtoms::br)) { + rv = htmlEditor->DeleteNode(brNode); + NS_ENSURE_SUCCESS(rv, rv); + // We don't need to act on this node any more + arrayOfNodes.RemoveElement(brNode); + } + // Make sure we can put a block here + rv = SplitAsNeeded(blockType, parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<Element> block = + htmlEditor->CreateNode(blockType, parent, offset); + NS_ENSURE_STATE(block); + // Remember our new block for postprocessing + mNewBlock = block; + // Delete anything that was in the list of nodes + while (!arrayOfNodes.IsEmpty()) { + OwningNonNull<nsINode> curNode = arrayOfNodes[0]; + rv = htmlEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + arrayOfNodes.RemoveElementAt(0); + } + // Put selection in new block + *aHandled = true; + rv = aSelection.Collapse(block, 0); + // Don't restore the selection + selectionRestorer.Abort(); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; + } + // Okay, now go through all the nodes and make the right kind of blocks, or + // whatever is approriate. Woohoo! Note: blockquote is handled a little + // differently. + if (blockType == nsGkAtoms::blockquote) { + rv = MakeBlockquote(arrayOfNodes); + NS_ENSURE_SUCCESS(rv, rv); + } else if (blockType == nsGkAtoms::normal || + blockType == nsGkAtoms::_empty) { + rv = RemoveBlockStyle(arrayOfNodes); + NS_ENSURE_SUCCESS(rv, rv); + } else { + rv = ApplyBlockStyle(arrayOfNodes, blockType); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +nsresult +HTMLEditRules::DidMakeBasicBlock(Selection* aSelection, + RulesInfo* aInfo, + nsresult aResult) +{ + NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER); + // check for empty block. if so, put a moz br in it. + if (!aSelection->Collapsed()) { + return NS_OK; + } + + NS_ENSURE_STATE(aSelection->GetRangeAt(0) && + aSelection->GetRangeAt(0)->GetStartParent()); + nsresult rv = + InsertMozBRIfNeeded(*aSelection->GetRangeAt(0)->GetStartParent()); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; +} + +nsresult +HTMLEditRules::WillIndent(Selection* aSelection, + bool* aCancel, + bool* aHandled) +{ + NS_ENSURE_STATE(mHTMLEditor); + if (mHTMLEditor->IsCSSEnabled()) { + nsresult rv = WillCSSIndent(aSelection, aCancel, aHandled); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + nsresult rv = WillHTMLIndent(aSelection, aCancel, aHandled); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::WillCSSIndent(Selection* aSelection, + bool* aCancel, + bool* aHandled) +{ + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + + WillInsert(*aSelection, aCancel); + + // initialize out param + // we want to ignore result of WillInsert() + *aCancel = false; + *aHandled = true; + + nsresult rv = NormalizeSelection(aSelection); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + AutoSelectionRestorer selectionRestorer(aSelection, mHTMLEditor); + nsTArray<OwningNonNull<nsRange>> arrayOfRanges; + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + + // short circuit: detect case of collapsed selection inside an <li>. + // just sublist that <li>. This prevents bug 97797. + + nsCOMPtr<Element> liNode; + if (aSelection->Collapsed()) { + nsCOMPtr<nsINode> node; + int32_t offset; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(aSelection, + getter_AddRefs(node), &offset); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<Element> block = mHTMLEditor->GetBlock(*node); + if (block && HTMLEditUtils::IsListItem(block)) { + liNode = block; + } + } + + if (liNode) { + arrayOfNodes.AppendElement(*liNode); + } else { + // convert the selection ranges into "promoted" selection ranges: + // this basically just expands the range to include the immediate + // block parent, and then further expands to include any ancestors + // whose children are all in the range + rv = GetNodesFromSelection(*aSelection, EditAction::indent, arrayOfNodes); + NS_ENSURE_SUCCESS(rv, rv); + } + + // if nothing visible in list, make an empty block + if (ListIsEmptyLine(arrayOfNodes)) { + // get selection location + NS_ENSURE_STATE(aSelection->RangeCount()); + nsCOMPtr<nsINode> parent = aSelection->GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_STATE(parent); + + // make sure we can put a block here + rv = SplitAsNeeded(*nsGkAtoms::div, parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> theBlock = mHTMLEditor->CreateNode(nsGkAtoms::div, + parent, offset); + NS_ENSURE_STATE(theBlock); + // remember our new block for postprocessing + mNewBlock = theBlock; + ChangeIndentation(*theBlock, Change::plus); + // delete anything that was in the list of nodes + while (!arrayOfNodes.IsEmpty()) { + OwningNonNull<nsINode> curNode = arrayOfNodes[0]; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + arrayOfNodes.RemoveElementAt(0); + } + // put selection in new block + *aHandled = true; + rv = aSelection->Collapse(theBlock, 0); + // Don't restore the selection + selectionRestorer.Abort(); + return rv; + } + + // Ok, now go through all the nodes and put them in a blockquote, + // or whatever is appropriate. Wohoo! + nsCOMPtr<nsINode> curParent; + nsCOMPtr<Element> curList, curQuote; + nsCOMPtr<nsIContent> sibling; + int32_t listCount = arrayOfNodes.Length(); + for (int32_t i = 0; i < listCount; i++) { + // here's where we actually figure out what to do + NS_ENSURE_STATE(arrayOfNodes[i]->IsContent()); + nsCOMPtr<nsIContent> curNode = arrayOfNodes[i]->AsContent(); + + // Ignore all non-editable nodes. Leave them be. + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsEditable(curNode)) { + continue; + } + + curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + + // some logic for putting list items into nested lists... + if (HTMLEditUtils::IsList(curParent)) { + sibling = nullptr; + + // Check for whether we should join a list that follows curNode. + // We do this if the next element is a list, and the list is of the + // same type (li/ol) as curNode was a part it. + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetNextHTMLSibling(curNode); + if (sibling && HTMLEditUtils::IsList(sibling) && + curParent->NodeInfo()->NameAtom() == + sibling->NodeInfo()->NameAtom() && + curParent->NodeInfo()->NamespaceID() == + sibling->NodeInfo()->NamespaceID()) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, sibling, 0); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + // Check for whether we should join a list that preceeds curNode. + // We do this if the previous element is a list, and the list is of + // the same type (li/ol) as curNode was a part of. + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetPriorHTMLSibling(curNode); + if (sibling && HTMLEditUtils::IsList(sibling) && + curParent->NodeInfo()->NameAtom() == + sibling->NodeInfo()->NameAtom() && + curParent->NodeInfo()->NamespaceID() == + sibling->NodeInfo()->NamespaceID()) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, sibling, -1); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + sibling = nullptr; + + // check to see if curList is still appropriate. Which it is if + // curNode is still right after it in the same list. + if (curList) { + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetPriorHTMLSibling(curNode); + } + + if (!curList || (sibling && sibling != curList)) { + // create a new nested list of correct type + rv = + SplitAsNeeded(*curParent->NodeInfo()->NameAtom(), curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curList = mHTMLEditor->CreateNode(curParent->NodeInfo()->NameAtom(), + curParent, offset); + NS_ENSURE_STATE(curList); + // curList is now the correct thing to put curNode in + // remember our new block for postprocessing + mNewBlock = curList; + } + // tuck the node into the end of the active list + uint32_t listLen = curList->Length(); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curList, listLen); + NS_ENSURE_SUCCESS(rv, rv); + } + // Not a list item. + else { + if (curNode && IsBlockNode(*curNode)) { + ChangeIndentation(*curNode->AsElement(), Change::plus); + curQuote = nullptr; + } else { + if (!curQuote) { + // First, check that our element can contain a div. + if (!mTextEditor->CanContainTag(*curParent, *nsGkAtoms::div)) { + return NS_OK; // cancelled + } + + rv = SplitAsNeeded(*nsGkAtoms::div, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curQuote = mHTMLEditor->CreateNode(nsGkAtoms::div, curParent, + offset); + NS_ENSURE_STATE(curQuote); + ChangeIndentation(*curQuote, Change::plus); + // remember our new block for postprocessing + mNewBlock = curQuote; + // curQuote is now the correct thing to put curNode in + } + + // tuck the node into the end of the active blockquote + uint32_t quoteLen = curQuote->Length(); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curQuote, quoteLen); + NS_ENSURE_SUCCESS(rv, rv); + } + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::WillHTMLIndent(Selection* aSelection, + bool* aCancel, + bool* aHandled) +{ + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + WillInsert(*aSelection, aCancel); + + // initialize out param + // we want to ignore result of WillInsert() + *aCancel = false; + *aHandled = true; + + nsresult rv = NormalizeSelection(aSelection); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + AutoSelectionRestorer selectionRestorer(aSelection, mHTMLEditor); + + // convert the selection ranges into "promoted" selection ranges: + // this basically just expands the range to include the immediate + // block parent, and then further expands to include any ancestors + // whose children are all in the range + + nsTArray<RefPtr<nsRange>> arrayOfRanges; + GetPromotedRanges(*aSelection, arrayOfRanges, EditAction::indent); + + // use these ranges to contruct a list of nodes to act on. + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + rv = GetNodesForOperation(arrayOfRanges, arrayOfNodes, EditAction::indent); + NS_ENSURE_SUCCESS(rv, rv); + + // if nothing visible in list, make an empty block + if (ListIsEmptyLine(arrayOfNodes)) { + // get selection location + NS_ENSURE_STATE(aSelection->RangeCount()); + nsCOMPtr<nsINode> parent = aSelection->GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection->GetRangeAt(0)->StartOffset(); + NS_ENSURE_STATE(parent); + + // make sure we can put a block here + rv = SplitAsNeeded(*nsGkAtoms::blockquote, parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> theBlock = mHTMLEditor->CreateNode(nsGkAtoms::blockquote, + parent, offset); + NS_ENSURE_STATE(theBlock); + // remember our new block for postprocessing + mNewBlock = theBlock; + // delete anything that was in the list of nodes + while (!arrayOfNodes.IsEmpty()) { + OwningNonNull<nsINode> curNode = arrayOfNodes[0]; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + arrayOfNodes.RemoveElementAt(0); + } + // put selection in new block + *aHandled = true; + rv = aSelection->Collapse(theBlock, 0); + // Don't restore the selection + selectionRestorer.Abort(); + return rv; + } + + // Ok, now go through all the nodes and put them in a blockquote, + // or whatever is appropriate. Wohoo! + nsCOMPtr<nsINode> curParent; + nsCOMPtr<nsIContent> sibling; + nsCOMPtr<Element> curList, curQuote, indentedLI; + int32_t listCount = arrayOfNodes.Length(); + for (int32_t i = 0; i < listCount; i++) { + // here's where we actually figure out what to do + NS_ENSURE_STATE(arrayOfNodes[i]->IsContent()); + nsCOMPtr<nsIContent> curNode = arrayOfNodes[i]->AsContent(); + + // Ignore all non-editable nodes. Leave them be. + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsEditable(curNode)) { + continue; + } + + curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + + // some logic for putting list items into nested lists... + if (HTMLEditUtils::IsList(curParent)) { + sibling = nullptr; + + // Check for whether we should join a list that follows curNode. + // We do this if the next element is a list, and the list is of the + // same type (li/ol) as curNode was a part it. + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetNextHTMLSibling(curNode); + if (sibling && HTMLEditUtils::IsList(sibling) && + curParent->NodeInfo()->NameAtom() == + sibling->NodeInfo()->NameAtom() && + curParent->NodeInfo()->NamespaceID() == + sibling->NodeInfo()->NamespaceID()) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, sibling, 0); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + + // Check for whether we should join a list that preceeds curNode. + // We do this if the previous element is a list, and the list is of + // the same type (li/ol) as curNode was a part of. + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetPriorHTMLSibling(curNode); + if (sibling && HTMLEditUtils::IsList(sibling) && + curParent->NodeInfo()->NameAtom() == + sibling->NodeInfo()->NameAtom() && + curParent->NodeInfo()->NamespaceID() == + sibling->NodeInfo()->NamespaceID()) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, sibling, -1); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + + sibling = nullptr; + + // check to see if curList is still appropriate. Which it is if + // curNode is still right after it in the same list. + if (curList) { + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetPriorHTMLSibling(curNode); + } + + if (!curList || (sibling && sibling != curList)) { + // create a new nested list of correct type + rv = + SplitAsNeeded(*curParent->NodeInfo()->NameAtom(), curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curList = mHTMLEditor->CreateNode(curParent->NodeInfo()->NameAtom(), + curParent, offset); + NS_ENSURE_STATE(curList); + // curList is now the correct thing to put curNode in + // remember our new block for postprocessing + mNewBlock = curList; + } + // tuck the node into the end of the active list + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + // forget curQuote, if any + curQuote = nullptr; + } + // Not a list item, use blockquote? + else { + // if we are inside a list item, we don't want to blockquote, we want + // to sublist the list item. We may have several nodes listed in the + // array of nodes to act on, that are in the same list item. Since + // we only want to indent that li once, we must keep track of the most + // recent indented list item, and not indent it if we find another node + // to act on that is still inside the same li. + nsCOMPtr<Element> listItem = IsInListItem(curNode); + if (listItem) { + if (indentedLI == listItem) { + // already indented this list item + continue; + } + curParent = listItem->GetParentNode(); + offset = curParent ? curParent->IndexOf(listItem) : -1; + // check to see if curList is still appropriate. Which it is if + // curNode is still right after it in the same list. + if (curList) { + sibling = nullptr; + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetPriorHTMLSibling(curNode); + } + + if (!curList || (sibling && sibling != curList)) { + // create a new nested list of correct type + rv = SplitAsNeeded(*curParent->NodeInfo()->NameAtom(), curParent, + offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curList = mHTMLEditor->CreateNode(curParent->NodeInfo()->NameAtom(), + curParent, offset); + NS_ENSURE_STATE(curList); + } + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(listItem, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + // remember we indented this li + indentedLI = listItem; + } else { + // need to make a blockquote to put things in if we haven't already, + // or if this node doesn't go in blockquote we used earlier. + // One reason it might not go in prio blockquote is if we are now + // in a different table cell. + if (curQuote && InDifferentTableElements(curQuote, curNode)) { + curQuote = nullptr; + } + + if (!curQuote) { + // First, check that our element can contain a blockquote. + if (!mTextEditor->CanContainTag(*curParent, *nsGkAtoms::blockquote)) { + return NS_OK; // cancelled + } + + rv = SplitAsNeeded(*nsGkAtoms::blockquote, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curQuote = mHTMLEditor->CreateNode(nsGkAtoms::blockquote, curParent, + offset); + NS_ENSURE_STATE(curQuote); + // remember our new block for postprocessing + mNewBlock = curQuote; + // curQuote is now the correct thing to put curNode in + } + + // tuck the node into the end of the active blockquote + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(curNode, curQuote, -1); + NS_ENSURE_SUCCESS(rv, rv); + // forget curList, if any + curList = nullptr; + } + } + } + return NS_OK; +} + + +nsresult +HTMLEditRules::WillOutdent(Selection& aSelection, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aCancel && aHandled); + *aCancel = false; + *aHandled = true; + nsCOMPtr<nsIContent> rememberedLeftBQ, rememberedRightBQ; + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + bool useCSS = htmlEditor->IsCSSEnabled(); + + nsresult rv = NormalizeSelection(&aSelection); + NS_ENSURE_SUCCESS(rv, rv); + + // Some scoping for selection resetting - we may need to tweak it + { + AutoSelectionRestorer selectionRestorer(&aSelection, htmlEditor); + + // Convert the selection ranges into "promoted" selection ranges: this + // basically just expands the range to include the immediate block parent, + // and then further expands to include any ancestors whose children are all + // in the range + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + rv = GetNodesFromSelection(aSelection, EditAction::outdent, arrayOfNodes); + NS_ENSURE_SUCCESS(rv, rv); + + // Okay, now go through all the nodes and remove a level of blockquoting, + // or whatever is appropriate. Wohoo! + + nsCOMPtr<Element> curBlockQuote; + nsCOMPtr<nsIContent> firstBQChild, lastBQChild; + bool curBlockQuoteIsIndentedWithCSS = false; + for (uint32_t i = 0; i < arrayOfNodes.Length(); i++) { + if (!arrayOfNodes[i]->IsContent()) { + continue; + } + OwningNonNull<nsIContent> curNode = *arrayOfNodes[i]->AsContent(); + + // Here's where we actually figure out what to do + nsCOMPtr<nsINode> curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + + // Is it a blockquote? + if (curNode->IsHTMLElement(nsGkAtoms::blockquote)) { + // If it is a blockquote, remove it. So we need to finish up dealng + // with any curBlockQuote first. + if (curBlockQuote) { + rv = OutdentPartOfBlock(*curBlockQuote, *firstBQChild, *lastBQChild, + curBlockQuoteIsIndentedWithCSS, + getter_AddRefs(rememberedLeftBQ), + getter_AddRefs(rememberedRightBQ)); + NS_ENSURE_SUCCESS(rv, rv); + curBlockQuote = nullptr; + firstBQChild = nullptr; + lastBQChild = nullptr; + curBlockQuoteIsIndentedWithCSS = false; + } + rv = htmlEditor->RemoveBlockContainer(curNode); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + // Is it a block with a 'margin' property? + if (useCSS && IsBlockNode(curNode)) { + nsIAtom& marginProperty = + MarginPropertyAtomForIndent(*htmlEditor->mCSSEditUtils, curNode); + nsAutoString value; + htmlEditor->mCSSEditUtils->GetSpecifiedProperty(curNode, + marginProperty, + value); + float f; + nsCOMPtr<nsIAtom> unit; + NS_ENSURE_STATE(htmlEditor); + htmlEditor->mCSSEditUtils->ParseLength(value, &f, + getter_AddRefs(unit)); + if (f > 0) { + ChangeIndentation(*curNode->AsElement(), Change::minus); + continue; + } + } + // Is it a list item? + if (HTMLEditUtils::IsListItem(curNode)) { + // If it is a list item, that means we are not outdenting whole list. + // So we need to finish up dealing with any curBlockQuote, and then pop + // this list item. + if (curBlockQuote) { + rv = OutdentPartOfBlock(*curBlockQuote, *firstBQChild, *lastBQChild, + curBlockQuoteIsIndentedWithCSS, + getter_AddRefs(rememberedLeftBQ), + getter_AddRefs(rememberedRightBQ)); + NS_ENSURE_SUCCESS(rv, rv); + curBlockQuote = nullptr; + firstBQChild = nullptr; + lastBQChild = nullptr; + curBlockQuoteIsIndentedWithCSS = false; + } + bool unused; + rv = PopListItem(GetAsDOMNode(curNode), &unused); + NS_ENSURE_SUCCESS(rv, rv); + continue; + } + // Do we have a blockquote that we are already committed to removing? + if (curBlockQuote) { + // If so, is this node a descendant? + if (EditorUtils::IsDescendantOf(curNode, curBlockQuote)) { + lastBQChild = curNode; + // Then we don't need to do anything different for this node + continue; + } + // Otherwise, we have progressed beyond end of curBlockQuote, so + // let's handle it now. We need to remove the portion of + // curBlockQuote that contains [firstBQChild - lastBQChild]. + rv = OutdentPartOfBlock(*curBlockQuote, *firstBQChild, *lastBQChild, + curBlockQuoteIsIndentedWithCSS, + getter_AddRefs(rememberedLeftBQ), + getter_AddRefs(rememberedRightBQ)); + NS_ENSURE_SUCCESS(rv, rv); + curBlockQuote = nullptr; + firstBQChild = nullptr; + lastBQChild = nullptr; + curBlockQuoteIsIndentedWithCSS = false; + // Fall out and handle curNode + } + + // Are we inside a blockquote? + OwningNonNull<nsINode> n = curNode; + curBlockQuoteIsIndentedWithCSS = false; + // Keep looking up the hierarchy as long as we don't hit the body or the + // active editing host or a table element (other than an entire table) + while (!n->IsHTMLElement(nsGkAtoms::body) && + htmlEditor->IsDescendantOfEditorRoot(n) && + (n->IsHTMLElement(nsGkAtoms::table) || + !HTMLEditUtils::IsTableElement(n))) { + if (!n->GetParentNode()) { + break; + } + n = *n->GetParentNode(); + if (n->IsHTMLElement(nsGkAtoms::blockquote)) { + // If so, remember it and the first node we are taking out of it. + curBlockQuote = n->AsElement(); + firstBQChild = curNode; + lastBQChild = curNode; + break; + } else if (useCSS) { + nsIAtom& marginProperty = + MarginPropertyAtomForIndent(*htmlEditor->mCSSEditUtils, curNode); + nsAutoString value; + htmlEditor->mCSSEditUtils->GetSpecifiedProperty(*n, marginProperty, + value); + float f; + nsCOMPtr<nsIAtom> unit; + htmlEditor->mCSSEditUtils->ParseLength(value, &f, getter_AddRefs(unit)); + if (f > 0 && !(HTMLEditUtils::IsList(curParent) && + HTMLEditUtils::IsList(curNode))) { + curBlockQuote = n->AsElement(); + firstBQChild = curNode; + lastBQChild = curNode; + curBlockQuoteIsIndentedWithCSS = true; + break; + } + } + } + + if (!curBlockQuote) { + // Couldn't find enclosing blockquote. Handle list cases. + if (HTMLEditUtils::IsList(curParent)) { + // Move node out of list + if (HTMLEditUtils::IsList(curNode)) { + // Just unwrap this sublist + rv = htmlEditor->RemoveBlockContainer(curNode); + NS_ENSURE_SUCCESS(rv, rv); + } + // handled list item case above + } else if (HTMLEditUtils::IsList(curNode)) { + // node is a list, but parent is non-list: move list items out + nsCOMPtr<nsIContent> child = curNode->GetLastChild(); + while (child) { + if (HTMLEditUtils::IsListItem(child)) { + bool unused; + rv = PopListItem(GetAsDOMNode(child), &unused); + NS_ENSURE_SUCCESS(rv, rv); + } else if (HTMLEditUtils::IsList(child)) { + // We have an embedded list, so move it out from under the parent + // list. Be sure to put it after the parent list because this + // loop iterates backwards through the parent's list of children. + + rv = htmlEditor->MoveNode(child, curParent, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Delete any non-list items for now + rv = htmlEditor->DeleteNode(child); + NS_ENSURE_SUCCESS(rv, rv); + } + child = curNode->GetLastChild(); + } + // Delete the now-empty list + rv = htmlEditor->RemoveBlockContainer(curNode); + NS_ENSURE_SUCCESS(rv, rv); + } else if (useCSS) { + nsCOMPtr<Element> element; + if (curNode->GetAsText()) { + // We want to outdent the parent of text nodes + element = curNode->GetParentElement(); + } else if (curNode->IsElement()) { + element = curNode->AsElement(); + } + if (element) { + ChangeIndentation(*element, Change::minus); + } + } + } + } + if (curBlockQuote) { + // We have a blockquote we haven't finished handling + rv = OutdentPartOfBlock(*curBlockQuote, *firstBQChild, *lastBQChild, + curBlockQuoteIsIndentedWithCSS, + getter_AddRefs(rememberedLeftBQ), + getter_AddRefs(rememberedRightBQ)); + NS_ENSURE_SUCCESS(rv, rv); + } + } + // Make sure selection didn't stick to last piece of content in old bq (only + // a problem for collapsed selections) + if (rememberedLeftBQ || rememberedRightBQ) { + if (aSelection.Collapsed()) { + // Push selection past end of rememberedLeftBQ + NS_ENSURE_TRUE(aSelection.GetRangeAt(0), NS_OK); + nsCOMPtr<nsINode> startNode = aSelection.GetRangeAt(0)->GetStartParent(); + int32_t startOffset = aSelection.GetRangeAt(0)->StartOffset(); + if (rememberedLeftBQ && + (startNode == rememberedLeftBQ || + EditorUtils::IsDescendantOf(startNode, rememberedLeftBQ))) { + // Selection is inside rememberedLeftBQ - push it past it. + startNode = rememberedLeftBQ->GetParentNode(); + startOffset = startNode ? 1 + startNode->IndexOf(rememberedLeftBQ) : 0; + aSelection.Collapse(startNode, startOffset); + } + // And pull selection before beginning of rememberedRightBQ + startNode = aSelection.GetRangeAt(0)->GetStartParent(); + startOffset = aSelection.GetRangeAt(0)->StartOffset(); + if (rememberedRightBQ && + (startNode == rememberedRightBQ || + EditorUtils::IsDescendantOf(startNode, rememberedRightBQ))) { + // Selection is inside rememberedRightBQ - push it before it. + startNode = rememberedRightBQ->GetParentNode(); + startOffset = startNode ? startNode->IndexOf(rememberedRightBQ) : -1; + aSelection.Collapse(startNode, startOffset); + } + } + return NS_OK; + } + return NS_OK; +} + + +/** + * RemovePartOfBlock() splits aBlock and move aStartChild to aEndChild out of + * aBlock. + */ +nsresult +HTMLEditRules::RemovePartOfBlock(Element& aBlock, + nsIContent& aStartChild, + nsIContent& aEndChild) +{ + SplitBlock(aBlock, aStartChild, aEndChild); + // Get rid of part of blockquote we are outdenting + + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->RemoveBlockContainer(aBlock); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +void +HTMLEditRules::SplitBlock(Element& aBlock, + nsIContent& aStartChild, + nsIContent& aEndChild, + nsIContent** aOutLeftNode, + nsIContent** aOutRightNode, + nsIContent** aOutMiddleNode) +{ + // aStartChild and aEndChild must be exclusive descendants of aBlock + MOZ_ASSERT(EditorUtils::IsDescendantOf(&aStartChild, &aBlock) && + EditorUtils::IsDescendantOf(&aEndChild, &aBlock)); + NS_ENSURE_TRUE_VOID(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Get split point location + OwningNonNull<nsIContent> startParent = *aStartChild.GetParent(); + int32_t startOffset = startParent->IndexOf(&aStartChild); + + // Do the splits! + nsCOMPtr<nsIContent> newMiddleNode1; + htmlEditor->SplitNodeDeep(aBlock, startParent, startOffset, + HTMLEditor::EmptyContainers::no, + aOutLeftNode, getter_AddRefs(newMiddleNode1)); + + // Get split point location + OwningNonNull<nsIContent> endParent = *aEndChild.GetParent(); + // +1 because we want to be after the child + int32_t endOffset = 1 + endParent->IndexOf(&aEndChild); + + // Do the splits! + nsCOMPtr<nsIContent> newMiddleNode2; + htmlEditor->SplitNodeDeep(aBlock, endParent, endOffset, + HTMLEditor::EmptyContainers::no, + getter_AddRefs(newMiddleNode2), aOutRightNode); + + if (aOutMiddleNode) { + if (newMiddleNode2) { + newMiddleNode2.forget(aOutMiddleNode); + } else { + newMiddleNode1.forget(aOutMiddleNode); + } + } +} + +nsresult +HTMLEditRules::OutdentPartOfBlock(Element& aBlock, + nsIContent& aStartChild, + nsIContent& aEndChild, + bool aIsBlockIndentedWithCSS, + nsIContent** aOutLeftNode, + nsIContent** aOutRightNode) +{ + MOZ_ASSERT(aOutLeftNode && aOutRightNode); + + nsCOMPtr<nsIContent> middleNode; + SplitBlock(aBlock, aStartChild, aEndChild, aOutLeftNode, aOutRightNode, + getter_AddRefs(middleNode)); + + NS_ENSURE_STATE(middleNode); + + if (!aIsBlockIndentedWithCSS) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->RemoveBlockContainer(*middleNode); + NS_ENSURE_SUCCESS(rv, rv); + } else if (middleNode->IsElement()) { + // We do nothing if middleNode isn't an element + nsresult rv = ChangeIndentation(*middleNode->AsElement(), Change::minus); + NS_ENSURE_SUCCESS(rv, rv); + } + + return NS_OK; +} + +/** + * ConvertListType() converts list type and list item type. + */ +nsresult +HTMLEditRules::ConvertListType(Element* aList, + Element** aOutList, + nsIAtom* aListType, + nsIAtom* aItemType) +{ + MOZ_ASSERT(aList); + MOZ_ASSERT(aOutList); + MOZ_ASSERT(aListType); + MOZ_ASSERT(aItemType); + + nsCOMPtr<nsINode> child = aList->GetFirstChild(); + while (child) { + if (child->IsElement()) { + dom::Element* element = child->AsElement(); + if (HTMLEditUtils::IsListItem(element) && + !element->IsHTMLElement(aItemType)) { + child = mHTMLEditor->ReplaceContainer(element, aItemType); + NS_ENSURE_STATE(child); + } else if (HTMLEditUtils::IsList(element) && + !element->IsHTMLElement(aListType)) { + nsCOMPtr<dom::Element> temp; + nsresult rv = ConvertListType(child->AsElement(), getter_AddRefs(temp), + aListType, aItemType); + NS_ENSURE_SUCCESS(rv, rv); + child = temp.forget(); + } + } + child = child->GetNextSibling(); + } + + if (aList->IsHTMLElement(aListType)) { + nsCOMPtr<dom::Element> list = aList->AsElement(); + list.forget(aOutList); + return NS_OK; + } + + *aOutList = mHTMLEditor->ReplaceContainer(aList, aListType).take(); + NS_ENSURE_STATE(aOutList); + + return NS_OK; +} + + +/** + * CreateStyleForInsertText() takes care of clearing and setting appropriate + * style nodes for text insertion. + */ +nsresult +HTMLEditRules::CreateStyleForInsertText(Selection& aSelection, + nsIDocument& aDoc) +{ + MOZ_ASSERT(mHTMLEditor->mTypeInState); + + bool weDidSomething = false; + NS_ENSURE_STATE(aSelection.GetRangeAt(0)); + nsCOMPtr<nsINode> node = aSelection.GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection.GetRangeAt(0)->StartOffset(); + + // next examine our present style and make sure default styles are either + // present or explicitly overridden. If neither, add the default style to + // the TypeInState + int32_t length = mHTMLEditor->mDefaultStyles.Length(); + for (int32_t j = 0; j < length; j++) { + PropItem* propItem = mHTMLEditor->mDefaultStyles[j]; + MOZ_ASSERT(propItem); + bool bFirst, bAny, bAll; + + // GetInlineProperty also examine TypeInState. The only gotcha here is + // that a cleared property looks like an unset property. For now I'm + // assuming that's not a problem: that default styles will always be + // multivalue styles (like font face or size) where clearing the style + // means we want to go back to the default. If we ever wanted a "toggle" + // style like bold for a default, though, I'll have to add code to detect + // the difference between unset and explicitly cleared, else user would + // never be able to unbold, for instance. + nsAutoString curValue; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetInlinePropertyBase(*propItem->tag, &propItem->attr, + nullptr, &bFirst, &bAny, &bAll, + &curValue, false); + NS_ENSURE_SUCCESS(rv, rv); + + if (!bAny) { + // no style set for this prop/attr + mHTMLEditor->mTypeInState->SetProp(propItem->tag, propItem->attr, + propItem->value); + } + } + + nsCOMPtr<Element> rootElement = aDoc.GetRootElement(); + NS_ENSURE_STATE(rootElement); + + // process clearing any styles first + nsAutoPtr<PropItem> item(mHTMLEditor->mTypeInState->TakeClearProperty()); + while (item && node != rootElement) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->ClearStyle(address_of(node), &offset, + item->tag, &item->attr); + NS_ENSURE_SUCCESS(rv, rv); + item = mHTMLEditor->mTypeInState->TakeClearProperty(); + weDidSomething = true; + } + + // then process setting any styles + int32_t relFontSize = mHTMLEditor->mTypeInState->TakeRelativeFontSize(); + item = mHTMLEditor->mTypeInState->TakeSetProperty(); + + if (item || relFontSize) { + // we have at least one style to add; make a new text node to insert style + // nodes above. + if (RefPtr<Text> text = node->GetAsText()) { + // if we are in a text node, split it + NS_ENSURE_STATE(mHTMLEditor); + offset = mHTMLEditor->SplitNodeDeep(*text, *text, offset); + NS_ENSURE_STATE(offset != -1); + node = node->GetParentNode(); + } + if (!mHTMLEditor->IsContainer(node)) { + return NS_OK; + } + OwningNonNull<Text> newNode = aDoc.CreateTextNode(EmptyString()); + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->InsertNode(*newNode, *node, offset); + NS_ENSURE_SUCCESS(rv, rv); + node = newNode; + offset = 0; + weDidSomething = true; + + if (relFontSize) { + // dir indicated bigger versus smaller. 1 = bigger, -1 = smaller + HTMLEditor::FontSize dir = relFontSize > 0 ? + HTMLEditor::FontSize::incr : HTMLEditor::FontSize::decr; + for (int32_t j = 0; j < DeprecatedAbs(relFontSize); j++) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->RelativeFontChangeOnTextNode(dir, newNode, 0, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + while (item) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->SetInlinePropertyOnNode(*node->AsContent(), + *item->tag, &item->attr, + item->value); + NS_ENSURE_SUCCESS(rv, rv); + item = mHTMLEditor->mTypeInState->TakeSetProperty(); + } + } + if (weDidSomething) { + return aSelection.Collapse(node, offset); + } + + return NS_OK; +} + + +/** + * Figure out if aNode is (or is inside) an empty block. A block can have + * children and still be considered empty, if the children are empty or + * non-editable. + */ +nsresult +HTMLEditRules::IsEmptyBlock(Element& aNode, + bool* aOutIsEmptyBlock, + MozBRCounts aMozBRCounts) +{ + MOZ_ASSERT(aOutIsEmptyBlock); + *aOutIsEmptyBlock = true; + + NS_ENSURE_TRUE(IsBlockNode(aNode), NS_ERROR_NULL_POINTER); + + return mHTMLEditor->IsEmptyNode(aNode.AsDOMNode(), aOutIsEmptyBlock, + aMozBRCounts == MozBRCounts::yes ? false + : true); +} + + +nsresult +HTMLEditRules::WillAlign(Selection& aSelection, + const nsAString& aAlignType, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aCancel && aHandled); + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + WillInsert(aSelection, aCancel); + + // Initialize out param. We want to ignore result of WillInsert(). + *aCancel = false; + *aHandled = false; + + nsresult rv = NormalizeSelection(&aSelection); + NS_ENSURE_SUCCESS(rv, rv); + AutoSelectionRestorer selectionRestorer(&aSelection, htmlEditor); + + // Convert the selection ranges into "promoted" selection ranges: This + // basically just expands the range to include the immediate block parent, + // and then further expands to include any ancestors whose children are all + // in the range + *aHandled = true; + nsTArray<OwningNonNull<nsINode>> nodeArray; + rv = GetNodesFromSelection(aSelection, EditAction::align, nodeArray); + NS_ENSURE_SUCCESS(rv, rv); + + // If we don't have any nodes, or we have only a single br, then we are + // creating an empty alignment div. We have to do some different things for + // these. + bool emptyDiv = nodeArray.IsEmpty(); + if (nodeArray.Length() == 1) { + OwningNonNull<nsINode> node = nodeArray[0]; + + if (HTMLEditUtils::SupportsAlignAttr(GetAsDOMNode(node))) { + // The node is a table element, an hr, a paragraph, a div or a section + // header; in HTML 4, it can directly carry the ALIGN attribute and we + // don't need to make a div! If we are in CSS mode, all the work is done + // in AlignBlock + rv = AlignBlock(*node->AsElement(), aAlignType, ContentsOnly::yes); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + + if (TextEditUtils::IsBreak(node)) { + // The special case emptyDiv code (below) that consumes BRs can cause + // tables to split if the start node of the selection is not in a table + // cell or caption, for example parent is a <tr>. Avoid this unnecessary + // splitting if possible by leaving emptyDiv FALSE so that we fall + // through to the normal case alignment code. + // + // XXX: It seems a little error prone for the emptyDiv special case code + // to assume that the start node of the selection is the parent of the + // single node in the nodeArray, as the paragraph above points out. Do we + // rely on the selection start node because of the fact that nodeArray + // can be empty? We should probably revisit this issue. - kin + + NS_ENSURE_STATE(aSelection.GetRangeAt(0) && + aSelection.GetRangeAt(0)->GetStartParent()); + OwningNonNull<nsINode> parent = + *aSelection.GetRangeAt(0)->GetStartParent(); + + emptyDiv = !HTMLEditUtils::IsTableElement(parent) || + HTMLEditUtils::IsTableCellOrCaption(parent); + } + } + if (emptyDiv) { + nsCOMPtr<nsINode> parent = + aSelection.GetRangeAt(0) ? aSelection.GetRangeAt(0)->GetStartParent() + : nullptr; + NS_ENSURE_STATE(parent); + int32_t offset = aSelection.GetRangeAt(0)->StartOffset(); + + rv = SplitAsNeeded(*nsGkAtoms::div, parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + // Consume a trailing br, if any. This is to keep an alignment from + // creating extra lines, if possible. + nsCOMPtr<nsIContent> brContent = + htmlEditor->GetNextHTMLNode(parent, offset); + if (brContent && TextEditUtils::IsBreak(brContent)) { + // Making use of html structure... if next node after where we are + // putting our div is not a block, then the br we found is in same block + // we are, so it's safe to consume it. + nsCOMPtr<nsIContent> sibling = htmlEditor->GetNextHTMLSibling(parent, + offset); + if (sibling && !IsBlockNode(*sibling)) { + rv = htmlEditor->DeleteNode(brContent); + NS_ENSURE_SUCCESS(rv, rv); + } + } + nsCOMPtr<Element> div = htmlEditor->CreateNode(nsGkAtoms::div, parent, + offset); + NS_ENSURE_STATE(div); + // Remember our new block for postprocessing + mNewBlock = div; + // Set up the alignment on the div, using HTML or CSS + rv = AlignBlock(*div, aAlignType, ContentsOnly::yes); + NS_ENSURE_SUCCESS(rv, rv); + *aHandled = true; + // Put in a moz-br so that it won't get deleted + rv = CreateMozBR(div->AsDOMNode(), 0); + NS_ENSURE_SUCCESS(rv, rv); + rv = aSelection.Collapse(div, 0); + // Don't restore the selection + selectionRestorer.Abort(); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + + // Next we detect all the transitions in the array, where a transition + // means that adjacent nodes in the array don't have the same parent. + + nsTArray<bool> transitionList; + MakeTransitionList(nodeArray, transitionList); + + // Okay, now go through all the nodes and give them an align attrib or put + // them in a div, or whatever is appropriate. Woohoo! + + nsCOMPtr<Element> curDiv; + bool useCSS = htmlEditor->IsCSSEnabled(); + for (size_t i = 0; i < nodeArray.Length(); i++) { + auto& curNode = nodeArray[i]; + // Here's where we actually figure out what to do + + // Ignore all non-editable nodes. Leave them be. + if (!htmlEditor->IsEditable(curNode)) { + continue; + } + + // The node is a table element, an hr, a paragraph, a div or a section + // header; in HTML 4, it can directly carry the ALIGN attribute and we + // don't need to nest it, just set the alignment. In CSS, assign the + // corresponding CSS styles in AlignBlock + if (HTMLEditUtils::SupportsAlignAttr(GetAsDOMNode(curNode))) { + rv = AlignBlock(*curNode->AsElement(), aAlignType, ContentsOnly::no); + NS_ENSURE_SUCCESS(rv, rv); + // Clear out curDiv so that we don't put nodes after this one into it + curDiv = nullptr; + continue; + } + + nsCOMPtr<nsINode> curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + + // Skip insignificant formatting text nodes to prevent unnecessary + // structure splitting! + bool isEmptyTextNode = false; + if (curNode->GetAsText() && + ((HTMLEditUtils::IsTableElement(curParent) && + !HTMLEditUtils::IsTableCellOrCaption(*curParent)) || + HTMLEditUtils::IsList(curParent) || + (NS_SUCCEEDED(htmlEditor->IsEmptyNode(curNode, &isEmptyTextNode)) && + isEmptyTextNode))) { + continue; + } + + // If it's a list item, or a list inside a list, forget any "current" div, + // and instead put divs inside the appropriate block (td, li, etc.) + if (HTMLEditUtils::IsListItem(curNode) || + HTMLEditUtils::IsList(curNode)) { + rv = RemoveAlignment(GetAsDOMNode(curNode), aAlignType, true); + NS_ENSURE_SUCCESS(rv, rv); + if (useCSS) { + htmlEditor->mCSSEditUtils->SetCSSEquivalentToHTMLStyle( + curNode->AsElement(), nullptr, &NS_LITERAL_STRING("align"), + &aAlignType, false); + curDiv = nullptr; + continue; + } + if (HTMLEditUtils::IsList(curParent)) { + // If we don't use CSS, add a contraint to list element: they have to + // be inside another list, i.e., >= second level of nesting + rv = AlignInnerBlocks(*curNode, &aAlignType); + NS_ENSURE_SUCCESS(rv, rv); + curDiv = nullptr; + continue; + } + // Clear out curDiv so that we don't put nodes after this one into it + } + + // Need to make a div to put things in if we haven't already, or if this + // node doesn't go in div we used earlier. + if (!curDiv || transitionList[i]) { + // First, check that our element can contain a div. + if (!mTextEditor->CanContainTag(*curParent, *nsGkAtoms::div)) { + // Cancelled + return NS_OK; + } + + rv = SplitAsNeeded(*nsGkAtoms::div, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + curDiv = htmlEditor->CreateNode(nsGkAtoms::div, curParent, offset); + NS_ENSURE_STATE(curDiv); + // Remember our new block for postprocessing + mNewBlock = curDiv; + // Set up the alignment on the div + rv = AlignBlock(*curDiv, aAlignType, ContentsOnly::yes); + } + + NS_ENSURE_STATE(curNode->IsContent()); + + // Tuck the node into the end of the active div + rv = htmlEditor->MoveNode(curNode->AsContent(), curDiv, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + + return NS_OK; +} + + +/** + * AlignInnerBlocks() aligns inside table cells or list items. + */ +nsresult +HTMLEditRules::AlignInnerBlocks(nsINode& aNode, + const nsAString* alignType) +{ + NS_ENSURE_TRUE(alignType, NS_ERROR_NULL_POINTER); + + // Gather list of table cells or list items + nsTArray<OwningNonNull<nsINode>> nodeArray; + TableCellAndListItemFunctor functor; + DOMIterator iter(aNode); + iter.AppendList(functor, nodeArray); + + // Now that we have the list, align their contents as requested + for (auto& node : nodeArray) { + nsresult rv = AlignBlockContents(GetAsDOMNode(node), alignType); + NS_ENSURE_SUCCESS(rv, rv); + } + + return NS_OK; +} + + +/** + * AlignBlockContents() aligns contents of a block element. + */ +nsresult +HTMLEditRules::AlignBlockContents(nsIDOMNode* aNode, + const nsAString* alignType) +{ + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + NS_ENSURE_TRUE(node && alignType, NS_ERROR_NULL_POINTER); + nsCOMPtr<nsIContent> firstChild, lastChild; + nsCOMPtr<Element> divNode; + + bool useCSS = mHTMLEditor->IsCSSEnabled(); + + NS_ENSURE_STATE(mHTMLEditor); + firstChild = mHTMLEditor->GetFirstEditableChild(*node); + NS_ENSURE_STATE(mHTMLEditor); + lastChild = mHTMLEditor->GetLastEditableChild(*node); + NS_NAMED_LITERAL_STRING(attr, "align"); + if (!firstChild) { + // this cell has no content, nothing to align + } else if (firstChild == lastChild && + firstChild->IsHTMLElement(nsGkAtoms::div)) { + // the cell already has a div containing all of its content: just + // act on this div. + nsCOMPtr<nsIDOMElement> divElem = do_QueryInterface(firstChild); + if (useCSS) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->SetAttributeOrEquivalent(divElem, attr, + *alignType, false); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->SetAttribute(divElem, attr, *alignType); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } else { + // else we need to put in a div, set the alignment, and toss in all the children + NS_ENSURE_STATE(mHTMLEditor); + divNode = mHTMLEditor->CreateNode(nsGkAtoms::div, node, 0); + NS_ENSURE_STATE(divNode); + // set up the alignment on the div + nsCOMPtr<nsIDOMElement> divElem = do_QueryInterface(divNode); + if (useCSS) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->SetAttributeOrEquivalent(divElem, attr, *alignType, false); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->SetAttribute(divElem, attr, *alignType); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + // tuck the children into the end of the active div + while (lastChild && (lastChild != divNode)) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->MoveNode(lastChild, divNode, 0); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + lastChild = mHTMLEditor->GetLastEditableChild(*node); + } + } + return NS_OK; +} + +/** + * CheckForEmptyBlock() is called by WillDeleteSelection() to detect and handle + * case of deleting from inside an empty block. + */ +nsresult +HTMLEditRules::CheckForEmptyBlock(nsINode* aStartNode, + Element* aBodyNode, + Selection* aSelection, + nsIEditor::EDirection aAction, + bool* aHandled) +{ + // If the editing host is an inline element, bail out early. + if (aBodyNode && IsInlineNode(*aBodyNode)) { + return NS_OK; + } + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // If we are inside an empty block, delete it. Note: do NOT delete table + // elements this way. + nsCOMPtr<Element> block = htmlEditor->GetBlock(*aStartNode); + bool bIsEmptyNode; + nsCOMPtr<Element> emptyBlock; + if (block && block != aBodyNode) { + // Efficiency hack, avoiding IsEmptyNode() call when in body + nsresult rv = htmlEditor->IsEmptyNode(block, &bIsEmptyNode, true, false); + NS_ENSURE_SUCCESS(rv, rv); + while (block && bIsEmptyNode && !HTMLEditUtils::IsTableElement(block) && + block != aBodyNode) { + emptyBlock = block; + block = htmlEditor->GetBlockNodeParent(emptyBlock); + if (block) { + rv = htmlEditor->IsEmptyNode(block, &bIsEmptyNode, true, false); + NS_ENSURE_SUCCESS(rv, rv); + } + } + } + + if (emptyBlock && emptyBlock->IsEditable()) { + nsCOMPtr<nsINode> blockParent = emptyBlock->GetParentNode(); + NS_ENSURE_TRUE(blockParent, NS_ERROR_FAILURE); + int32_t offset = blockParent->IndexOf(emptyBlock); + + if (HTMLEditUtils::IsListItem(emptyBlock)) { + // Are we the first list item in the list? + bool bIsFirst; + NS_ENSURE_STATE(htmlEditor); + nsresult rv = + htmlEditor->IsFirstEditableChild(GetAsDOMNode(emptyBlock), &bIsFirst); + NS_ENSURE_SUCCESS(rv, rv); + if (bIsFirst) { + nsCOMPtr<nsINode> listParent = blockParent->GetParentNode(); + NS_ENSURE_TRUE(listParent, NS_ERROR_FAILURE); + int32_t listOffset = listParent->IndexOf(blockParent); + // If we are a sublist, skip the br creation + if (!HTMLEditUtils::IsList(listParent)) { + // Create a br before list + NS_ENSURE_STATE(htmlEditor); + nsCOMPtr<Element> br = + htmlEditor->CreateBR(listParent, listOffset); + NS_ENSURE_STATE(br); + // Adjust selection to be right before it + rv = aSelection->Collapse(listParent, listOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + // Else just let selection percolate up. We'll adjust it in + // AfterEdit() + } + } else { + if (aAction == nsIEditor::eNext || aAction == nsIEditor::eNextWord || + aAction == nsIEditor::eToEndOfLine) { + // Move to the start of the next node, if any + nsCOMPtr<nsIContent> nextNode = htmlEditor->GetNextNode(blockParent, + offset + 1, true); + if (nextNode) { + EditorDOMPoint pt = GetGoodSelPointForNode(*nextNode, aAction); + nsresult rv = aSelection->Collapse(pt.node, pt.offset); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Adjust selection to be right after it. + nsresult rv = aSelection->Collapse(blockParent, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + } + } else if (aAction == nsIEditor::ePrevious || + aAction == nsIEditor::ePreviousWord || + aAction == nsIEditor::eToBeginningOfLine) { + // Move to the end of the previous node + nsCOMPtr<nsIContent> priorNode = htmlEditor->GetPriorNode(blockParent, + offset, + true); + if (priorNode) { + EditorDOMPoint pt = GetGoodSelPointForNode(*priorNode, aAction); + nsresult rv = aSelection->Collapse(pt.node, pt.offset); + NS_ENSURE_SUCCESS(rv, rv); + } else { + nsresult rv = aSelection->Collapse(blockParent, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + } + } else if (aAction != nsIEditor::eNone) { + NS_RUNTIMEABORT("CheckForEmptyBlock doesn't support this action yet"); + } + } + NS_ENSURE_STATE(htmlEditor); + *aHandled = true; + nsresult rv = htmlEditor->DeleteNode(emptyBlock); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +Element* +HTMLEditRules::CheckForInvisibleBR(Element& aBlock, + BRLocation aWhere, + int32_t aOffset) +{ + nsCOMPtr<nsINode> testNode; + int32_t testOffset = 0; + + if (aWhere == BRLocation::blockEnd) { + // No block crossing + nsCOMPtr<nsIContent> rightmostNode = + mHTMLEditor->GetRightmostChild(&aBlock, true); + + if (!rightmostNode) { + return nullptr; + } + + testNode = rightmostNode->GetParentNode(); + // Use offset + 1, so last node is included in our evaluation + testOffset = testNode->IndexOf(rightmostNode) + 1; + } else if (aOffset) { + testNode = &aBlock; + // We'll check everything to the left of the input position + testOffset = aOffset; + } else { + return nullptr; + } + + WSRunObject wsTester(mHTMLEditor, testNode, testOffset); + if (WSType::br == wsTester.mStartReason) { + return wsTester.mStartReasonNode->AsElement(); + } + + return nullptr; +} + +/** + * aLists and aTables allow the caller to specify what kind of content to + * "look inside". If aTables is Tables::yes, look inside any table content, + * and insert the inner content into the supplied issupportsarray at offset + * aIndex. Similarly with aLists and list content. aIndex is updated to + * point past inserted elements. + */ +void +HTMLEditRules::GetInnerContent( + nsINode& aNode, + nsTArray<OwningNonNull<nsINode>>& aOutArrayOfNodes, + int32_t* aIndex, + Lists aLists, + Tables aTables) +{ + MOZ_ASSERT(aIndex); + + for (nsCOMPtr<nsIContent> node = mHTMLEditor->GetFirstEditableChild(aNode); + node; node = node->GetNextSibling()) { + if ((aLists == Lists::yes && (HTMLEditUtils::IsList(node) || + HTMLEditUtils::IsListItem(node))) || + (aTables == Tables::yes && HTMLEditUtils::IsTableElement(node))) { + GetInnerContent(*node, aOutArrayOfNodes, aIndex, aLists, aTables); + } else { + aOutArrayOfNodes.InsertElementAt(*aIndex, *node); + (*aIndex)++; + } + } +} + +/** + * Promotes selection to include blocks that have all their children selected. + */ +nsresult +HTMLEditRules::ExpandSelectionForDeletion(Selection& aSelection) +{ + // Don't need to touch collapsed selections + if (aSelection.Collapsed()) { + return NS_OK; + } + + // We don't need to mess with cell selections, and we assume multirange + // selections are those. + if (aSelection.RangeCount() != 1) { + return NS_OK; + } + + // Find current sel start and end + NS_ENSURE_TRUE(aSelection.GetRangeAt(0), NS_ERROR_NULL_POINTER); + OwningNonNull<nsRange> range = *aSelection.GetRangeAt(0); + + nsCOMPtr<nsINode> selStartNode = range->GetStartParent(); + int32_t selStartOffset = range->StartOffset(); + nsCOMPtr<nsINode> selEndNode = range->GetEndParent(); + int32_t selEndOffset = range->EndOffset(); + + // Find current selection common block parent + nsCOMPtr<Element> selCommon = + HTMLEditor::GetBlock(*range->GetCommonAncestor()); + NS_ENSURE_STATE(selCommon); + + // Set up for loops and cache our root element + nsCOMPtr<nsINode> firstBRParent; + nsCOMPtr<nsINode> unused; + int32_t visOffset = 0, firstBROffset = 0; + WSType wsType; + nsCOMPtr<Element> root = mHTMLEditor->GetActiveEditingHost(); + NS_ENSURE_TRUE(root, NS_ERROR_FAILURE); + + // Find previous visible thingy before start of selection + if (selStartNode != selCommon && selStartNode != root) { + while (true) { + WSRunObject wsObj(mHTMLEditor, selStartNode, selStartOffset); + wsObj.PriorVisibleNode(selStartNode, selStartOffset, address_of(unused), + &visOffset, &wsType); + if (wsType != WSType::thisBlock) { + break; + } + // We want to keep looking up. But stop if we are crossing table + // element boundaries, or if we hit the root. + if (HTMLEditUtils::IsTableElement(wsObj.mStartReasonNode) || + selCommon == wsObj.mStartReasonNode || + root == wsObj.mStartReasonNode) { + break; + } + selStartNode = wsObj.mStartReasonNode->GetParentNode(); + selStartOffset = selStartNode ? + selStartNode->IndexOf(wsObj.mStartReasonNode) : -1; + } + } + + // Find next visible thingy after end of selection + if (selEndNode != selCommon && selEndNode != root) { + for (;;) { + WSRunObject wsObj(mHTMLEditor, selEndNode, selEndOffset); + wsObj.NextVisibleNode(selEndNode, selEndOffset, address_of(unused), + &visOffset, &wsType); + if (wsType == WSType::br) { + if (mHTMLEditor->IsVisBreak(wsObj.mEndReasonNode)) { + break; + } + if (!firstBRParent) { + firstBRParent = selEndNode; + firstBROffset = selEndOffset; + } + selEndNode = wsObj.mEndReasonNode->GetParentNode(); + selEndOffset = selEndNode + ? selEndNode->IndexOf(wsObj.mEndReasonNode) + 1 : 0; + } else if (wsType == WSType::thisBlock) { + // We want to keep looking up. But stop if we are crossing table + // element boundaries, or if we hit the root. + if (HTMLEditUtils::IsTableElement(wsObj.mEndReasonNode) || + selCommon == wsObj.mEndReasonNode || + root == wsObj.mEndReasonNode) { + break; + } + selEndNode = wsObj.mEndReasonNode->GetParentNode(); + selEndOffset = 1 + selEndNode->IndexOf(wsObj.mEndReasonNode); + } else { + break; + } + } + } + // Now set the selection to the new range + aSelection.Collapse(selStartNode, selStartOffset); + + // Expand selection endpoint only if we didn't pass a br, or if we really + // needed to pass that br (i.e., its block is now totally selected) + bool doEndExpansion = true; + if (firstBRParent) { + // Find block node containing br + nsCOMPtr<Element> brBlock = HTMLEditor::GetBlock(*firstBRParent); + bool nodeBefore = false, nodeAfter = false; + + // Create a range that represents expanded selection + RefPtr<nsRange> range = new nsRange(selStartNode); + nsresult rv = range->SetStart(selStartNode, selStartOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = range->SetEnd(selEndNode, selEndOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // Check if block is entirely inside range + if (brBlock) { + nsRange::CompareNodeToRange(brBlock, range, &nodeBefore, &nodeAfter); + } + + // If block isn't contained, forgo grabbing the br in expanded selection + if (nodeBefore || nodeAfter) { + doEndExpansion = false; + } + } + if (doEndExpansion) { + nsresult rv = aSelection.Extend(selEndNode, selEndOffset); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Only expand to just before br + nsresult rv = aSelection.Extend(firstBRParent, firstBROffset); + NS_ENSURE_SUCCESS(rv, rv); + } + + return NS_OK; +} + +/** + * NormalizeSelection() tweaks non-collapsed selections to be more "natural". + * Idea here is to adjust selection endpoint so that they do not cross breaks + * or block boundaries unless something editable beyond that boundary is also + * selected. This adjustment makes it much easier for the various block + * operations to determine what nodes to act on. + */ +nsresult +HTMLEditRules::NormalizeSelection(Selection* inSelection) +{ + NS_ENSURE_TRUE(inSelection, NS_ERROR_NULL_POINTER); + + // don't need to touch collapsed selections + if (inSelection->Collapsed()) { + return NS_OK; + } + + int32_t rangeCount; + nsresult rv = inSelection->GetRangeCount(&rangeCount); + NS_ENSURE_SUCCESS(rv, rv); + + // we don't need to mess with cell selections, and we assume multirange selections are those. + if (rangeCount != 1) { + return NS_OK; + } + + RefPtr<nsRange> range = inSelection->GetRangeAt(0); + NS_ENSURE_TRUE(range, NS_ERROR_NULL_POINTER); + nsCOMPtr<nsIDOMNode> startNode, endNode; + int32_t startOffset, endOffset; + nsCOMPtr<nsIDOMNode> newStartNode, newEndNode; + int32_t newStartOffset, newEndOffset; + + rv = range->GetStartContainer(getter_AddRefs(startNode)); + NS_ENSURE_SUCCESS(rv, rv); + rv = range->GetStartOffset(&startOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = range->GetEndContainer(getter_AddRefs(endNode)); + NS_ENSURE_SUCCESS(rv, rv); + rv = range->GetEndOffset(&endOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // adjusted values default to original values + newStartNode = startNode; + newStartOffset = startOffset; + newEndNode = endNode; + newEndOffset = endOffset; + + // some locals we need for whitespace code + nsCOMPtr<nsINode> unused; + int32_t offset; + WSType wsType; + + // let the whitespace code do the heavy lifting + WSRunObject wsEndObj(mHTMLEditor, endNode, endOffset); + // is there any intervening visible whitespace? if so we can't push selection past that, + // it would visibly change maening of users selection + nsCOMPtr<nsINode> endNode_(do_QueryInterface(endNode)); + wsEndObj.PriorVisibleNode(endNode_, endOffset, address_of(unused), + &offset, &wsType); + if (wsType != WSType::text && wsType != WSType::normalWS) { + // eThisBlock and eOtherBlock conveniently distinquish cases + // of going "down" into a block and "up" out of a block. + if (wsEndObj.mStartReason == WSType::otherBlock) { + // endpoint is just after the close of a block. + nsCOMPtr<nsIDOMNode> child = + GetAsDOMNode(mHTMLEditor->GetRightmostChild(wsEndObj.mStartReasonNode, + true)); + if (child) { + newEndNode = EditorBase::GetNodeLocation(child, &newEndOffset); + ++newEndOffset; // offset *after* child + } + // else block is empty - we can leave selection alone here, i think. + } else if (wsEndObj.mStartReason == WSType::thisBlock) { + // endpoint is just after start of this block + nsCOMPtr<nsIDOMNode> child; + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->GetPriorHTMLNode(endNode, endOffset, address_of(child)); + if (child) { + newEndNode = EditorBase::GetNodeLocation(child, &newEndOffset); + ++newEndOffset; // offset *after* child + } + // else block is empty - we can leave selection alone here, i think. + } else if (wsEndObj.mStartReason == WSType::br) { + // endpoint is just after break. lets adjust it to before it. + newEndNode = + EditorBase::GetNodeLocation(GetAsDOMNode(wsEndObj.mStartReasonNode), + &newEndOffset); + } + } + + + // similar dealio for start of range + WSRunObject wsStartObj(mHTMLEditor, startNode, startOffset); + // is there any intervening visible whitespace? if so we can't push selection past that, + // it would visibly change maening of users selection + nsCOMPtr<nsINode> startNode_(do_QueryInterface(startNode)); + wsStartObj.NextVisibleNode(startNode_, startOffset, address_of(unused), + &offset, &wsType); + if (wsType != WSType::text && wsType != WSType::normalWS) { + // eThisBlock and eOtherBlock conveniently distinquish cases + // of going "down" into a block and "up" out of a block. + if (wsStartObj.mEndReason == WSType::otherBlock) { + // startpoint is just before the start of a block. + nsCOMPtr<nsIDOMNode> child = + GetAsDOMNode(mHTMLEditor->GetLeftmostChild(wsStartObj.mEndReasonNode, + true)); + if (child) { + newStartNode = EditorBase::GetNodeLocation(child, &newStartOffset); + } + // else block is empty - we can leave selection alone here, i think. + } else if (wsStartObj.mEndReason == WSType::thisBlock) { + // startpoint is just before end of this block + nsCOMPtr<nsIDOMNode> child; + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->GetNextHTMLNode(startNode, startOffset, address_of(child)); + if (child) { + newStartNode = EditorBase::GetNodeLocation(child, &newStartOffset); + } + // else block is empty - we can leave selection alone here, i think. + } else if (wsStartObj.mEndReason == WSType::br) { + // startpoint is just before a break. lets adjust it to after it. + newStartNode = + EditorBase::GetNodeLocation(GetAsDOMNode(wsStartObj.mEndReasonNode), + &newStartOffset); + ++newStartOffset; // offset *after* break + } + } + + // there is a demented possiblity we have to check for. We might have a very strange selection + // that is not collapsed and yet does not contain any editable content, and satisfies some of the + // above conditions that cause tweaking. In this case we don't want to tweak the selection into + // a block it was never in, etc. There are a variety of strategies one might use to try to + // detect these cases, but I think the most straightforward is to see if the adjusted locations + // "cross" the old values: ie, new end before old start, or new start after old end. If so + // then just leave things alone. + + int16_t comp; + comp = nsContentUtils::ComparePoints(startNode, startOffset, + newEndNode, newEndOffset); + if (comp == 1) { + return NS_OK; // New end before old start. + } + comp = nsContentUtils::ComparePoints(newStartNode, newStartOffset, + endNode, endOffset); + if (comp == 1) { + return NS_OK; // New start after old end. + } + + // otherwise set selection to new values. + inSelection->Collapse(newStartNode, newStartOffset); + inSelection->Extend(newEndNode, newEndOffset); + return NS_OK; +} + +/** + * GetPromotedPoint() figures out where a start or end point for a block + * operation really is. + */ +void +HTMLEditRules::GetPromotedPoint(RulesEndpoint aWhere, + nsIDOMNode* aNode, + int32_t aOffset, + EditAction actionID, + nsCOMPtr<nsIDOMNode>* outNode, + int32_t* outOffset) +{ + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + MOZ_ASSERT(node && outNode && outOffset); + + // default values + *outNode = node->AsDOMNode(); + *outOffset = aOffset; + + // we do one thing for text actions, something else entirely for other + // actions + if (actionID == EditAction::insertText || + actionID == EditAction::insertIMEText || + actionID == EditAction::insertBreak || + actionID == EditAction::deleteText) { + bool isSpace, isNBSP; + nsCOMPtr<nsIContent> content = do_QueryInterface(node), temp; + // for text actions, we want to look backwards (or forwards, as + // appropriate) for additional whitespace or nbsp's. We may have to act on + // these later even though they are outside of the initial selection. Even + // if they are in another node! + while (content) { + int32_t offset; + if (aWhere == kStart) { + NS_ENSURE_TRUE_VOID(mHTMLEditor); + mHTMLEditor->IsPrevCharInNodeWhitespace(content, *outOffset, + &isSpace, &isNBSP, + getter_AddRefs(temp), &offset); + } else { + NS_ENSURE_TRUE_VOID(mHTMLEditor); + mHTMLEditor->IsNextCharInNodeWhitespace(content, *outOffset, + &isSpace, &isNBSP, + getter_AddRefs(temp), &offset); + } + if (isSpace || isNBSP) { + content = temp; + *outOffset = offset; + } else { + break; + } + } + + *outNode = content->AsDOMNode(); + return; + } + + int32_t offset = aOffset; + + // else not a text section. In this case we want to see if we should grab + // any adjacent inline nodes and/or parents and other ancestors + if (aWhere == kStart) { + // some special casing for text nodes + if (node->IsNodeOfType(nsINode::eTEXT)) { + if (!node->GetParentNode()) { + // Okay, can't promote any further + return; + } + offset = node->GetParentNode()->IndexOf(node); + node = node->GetParentNode(); + } + + // look back through any further inline nodes that aren't across a <br> + // from us, and that are enclosed in the same block. + NS_ENSURE_TRUE_VOID(mHTMLEditor); + nsCOMPtr<nsINode> priorNode = + mHTMLEditor->GetPriorHTMLNode(node, offset, true); + + while (priorNode && priorNode->GetParentNode() && + mHTMLEditor && !mHTMLEditor->IsVisBreak(priorNode) && + !IsBlockNode(*priorNode)) { + offset = priorNode->GetParentNode()->IndexOf(priorNode); + node = priorNode->GetParentNode(); + NS_ENSURE_TRUE_VOID(mHTMLEditor); + priorNode = mHTMLEditor->GetPriorHTMLNode(node, offset, true); + } + + // finding the real start for this point. look up the tree for as long as + // we are the first node in the container, and as long as we haven't hit + // the body node. + NS_ENSURE_TRUE_VOID(mHTMLEditor); + nsCOMPtr<nsIContent> nearNode = + mHTMLEditor->GetPriorHTMLNode(node, offset, true); + while (!nearNode && !node->IsHTMLElement(nsGkAtoms::body) && + node->GetParentNode()) { + // some cutoffs are here: we don't need to also include them in the + // aWhere == kEnd case. as long as they are in one or the other it will + // work. special case for outdent: don't keep looking up if we have + // found a blockquote element to act on + if (actionID == EditAction::outdent && + node->IsHTMLElement(nsGkAtoms::blockquote)) { + break; + } + + int32_t parentOffset = node->GetParentNode()->IndexOf(node); + nsCOMPtr<nsINode> parent = node->GetParentNode(); + + // Don't walk past the editable section. Note that we need to check + // before walking up to a parent because we need to return the parent + // object, so the parent itself might not be in the editable area, but + // it's OK if we're not performing a block-level action. + bool blockLevelAction = actionID == EditAction::indent || + actionID == EditAction::outdent || + actionID == EditAction::align || + actionID == EditAction::makeBasicBlock; + NS_ENSURE_TRUE_VOID(mHTMLEditor); + if (!mHTMLEditor->IsDescendantOfEditorRoot(parent) && + (blockLevelAction || !mHTMLEditor || + !mHTMLEditor->IsDescendantOfEditorRoot(node))) { + NS_ENSURE_TRUE_VOID(mHTMLEditor); + break; + } + + node = parent; + offset = parentOffset; + NS_ENSURE_TRUE_VOID(mHTMLEditor); + nearNode = mHTMLEditor->GetPriorHTMLNode(node, offset, true); + } + *outNode = node->AsDOMNode(); + *outOffset = offset; + return; + } + + // aWhere == kEnd + // some special casing for text nodes + if (node->IsNodeOfType(nsINode::eTEXT)) { + if (!node->GetParentNode()) { + // Okay, can't promote any further + return; + } + // want to be after the text node + offset = 1 + node->GetParentNode()->IndexOf(node); + node = node->GetParentNode(); + } + + // look ahead through any further inline nodes that aren't across a <br> from + // us, and that are enclosed in the same block. + NS_ENSURE_TRUE(mHTMLEditor, /* void */); + nsCOMPtr<nsIContent> nextNode = + mHTMLEditor->GetNextHTMLNode(node, offset, true); + + while (nextNode && !IsBlockNode(*nextNode) && nextNode->GetParentNode()) { + offset = 1 + nextNode->GetParentNode()->IndexOf(nextNode); + node = nextNode->GetParentNode(); + NS_ENSURE_TRUE_VOID(mHTMLEditor); + if (mHTMLEditor->IsVisBreak(nextNode)) { + break; + } + + // Check for newlines in pre-formatted text nodes. + bool isPRE; + mHTMLEditor->IsPreformatted(nextNode->AsDOMNode(), &isPRE); + if (isPRE) { + nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(nextNode); + if (textNode) { + nsAutoString tempString; + textNode->GetData(tempString); + int32_t newlinePos = tempString.FindChar(nsCRT::LF); + if (newlinePos >= 0) { + if (static_cast<uint32_t>(newlinePos) + 1 == tempString.Length()) { + // No need for special processing if the newline is at the end. + break; + } + *outNode = nextNode->AsDOMNode(); + *outOffset = newlinePos + 1; + return; + } + } + } + NS_ENSURE_TRUE_VOID(mHTMLEditor); + nextNode = mHTMLEditor->GetNextHTMLNode(node, offset, true); + } + + // finding the real end for this point. look up the tree for as long as we + // are the last node in the container, and as long as we haven't hit the body + // node. + NS_ENSURE_TRUE_VOID(mHTMLEditor); + nsCOMPtr<nsIContent> nearNode = + mHTMLEditor->GetNextHTMLNode(node, offset, true); + while (!nearNode && !node->IsHTMLElement(nsGkAtoms::body) && + node->GetParentNode()) { + int32_t parentOffset = node->GetParentNode()->IndexOf(node); + nsCOMPtr<nsINode> parent = node->GetParentNode(); + + // Don't walk past the editable section. Note that we need to check before + // walking up to a parent because we need to return the parent object, so + // the parent itself might not be in the editable area, but it's OK. + if ((!mHTMLEditor || !mHTMLEditor->IsDescendantOfEditorRoot(node)) && + (!mHTMLEditor || !mHTMLEditor->IsDescendantOfEditorRoot(parent))) { + NS_ENSURE_TRUE_VOID(mHTMLEditor); + break; + } + + node = parent; + // we want to be AFTER nearNode + offset = parentOffset + 1; + NS_ENSURE_TRUE_VOID(mHTMLEditor); + nearNode = mHTMLEditor->GetNextHTMLNode(node, offset, true); + } + *outNode = node->AsDOMNode(); + *outOffset = offset; +} + +/** + * GetPromotedRanges() runs all the selection range endpoint through + * GetPromotedPoint(). + */ +void +HTMLEditRules::GetPromotedRanges(Selection& aSelection, + nsTArray<RefPtr<nsRange>>& outArrayOfRanges, + EditAction inOperationType) +{ + uint32_t rangeCount = aSelection.RangeCount(); + + for (uint32_t i = 0; i < rangeCount; i++) { + RefPtr<nsRange> selectionRange = aSelection.GetRangeAt(i); + MOZ_ASSERT(selectionRange); + + // Clone range so we don't muck with actual selection ranges + RefPtr<nsRange> opRange = selectionRange->CloneRange(); + + // Make a new adjusted range to represent the appropriate block content. + // The basic idea is to push out the range endpoints to truly enclose the + // blocks that we will affect. This call alters opRange. + PromoteRange(*opRange, inOperationType); + + // Stuff new opRange into array + outArrayOfRanges.AppendElement(opRange); + } +} + +/** + * PromoteRange() expands a range to include any parents for which all editable + * children are already in range. + */ +void +HTMLEditRules::PromoteRange(nsRange& aRange, + EditAction aOperationType) +{ + NS_ENSURE_TRUE(mHTMLEditor, ); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + nsCOMPtr<nsINode> startNode = aRange.GetStartParent(); + nsCOMPtr<nsINode> endNode = aRange.GetEndParent(); + int32_t startOffset = aRange.StartOffset(); + int32_t endOffset = aRange.EndOffset(); + + // MOOSE major hack: + // GetPromotedPoint doesn't really do the right thing for collapsed ranges + // inside block elements that contain nothing but a solo <br>. It's easier + // to put a workaround here than to revamp GetPromotedPoint. :-( + if (startNode == endNode && startOffset == endOffset) { + nsCOMPtr<Element> block = htmlEditor->GetBlock(*startNode); + if (block) { + bool bIsEmptyNode = false; + nsCOMPtr<nsIContent> root = htmlEditor->GetActiveEditingHost(); + // Make sure we don't go higher than our root element in the content tree + NS_ENSURE_TRUE(root, ); + if (!nsContentUtils::ContentIsDescendantOf(root, block)) { + htmlEditor->IsEmptyNode(block, &bIsEmptyNode, true, false); + } + if (bIsEmptyNode) { + startNode = block; + endNode = block; + startOffset = 0; + endOffset = block->Length(); + } + } + } + + // Make a new adjusted range to represent the appropriate block content. + // This is tricky. The basic idea is to push out the range endpoints to + // truly enclose the blocks that we will affect. + + nsCOMPtr<nsIDOMNode> opStartNode; + nsCOMPtr<nsIDOMNode> opEndNode; + int32_t opStartOffset, opEndOffset; + + GetPromotedPoint(kStart, GetAsDOMNode(startNode), startOffset, + aOperationType, address_of(opStartNode), &opStartOffset); + GetPromotedPoint(kEnd, GetAsDOMNode(endNode), endOffset, aOperationType, + address_of(opEndNode), &opEndOffset); + + // Make sure that the new range ends up to be in the editable section. + if (!htmlEditor->IsDescendantOfEditorRoot( + EditorBase::GetNodeAtRangeOffsetPoint(opStartNode, opStartOffset)) || + !htmlEditor->IsDescendantOfEditorRoot( + EditorBase::GetNodeAtRangeOffsetPoint(opEndNode, opEndOffset - 1))) { + return; + } + + DebugOnly<nsresult> rv = aRange.SetStart(opStartNode, opStartOffset); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + rv = aRange.SetEnd(opEndNode, opEndOffset); + MOZ_ASSERT(NS_SUCCEEDED(rv)); +} + +class UniqueFunctor final : public BoolDomIterFunctor +{ +public: + explicit UniqueFunctor(nsTArray<OwningNonNull<nsINode>>& aArray) + : mArray(aArray) + { + } + + // Used to build list of all nodes iterator covers. + virtual bool operator()(nsINode* aNode) const + { + return !mArray.Contains(aNode); + } + +private: + nsTArray<OwningNonNull<nsINode>>& mArray; +}; + +/** + * GetNodesForOperation() runs through the ranges in the array and construct a + * new array of nodes to be acted on. + */ +nsresult +HTMLEditRules::GetNodesForOperation( + nsTArray<RefPtr<nsRange>>& aArrayOfRanges, + nsTArray<OwningNonNull<nsINode>>& aOutArrayOfNodes, + EditAction aOperationType, + TouchContent aTouchContent) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + int32_t rangeCount = aArrayOfRanges.Length(); + if (aTouchContent == TouchContent::yes) { + // Split text nodes. This is necessary, since GetPromotedPoint() may return a + // range ending in a text node in case where part of a pre-formatted + // elements needs to be moved. + for (int32_t i = 0; i < rangeCount; i++) { + RefPtr<nsRange> r = aArrayOfRanges[i]; + nsCOMPtr<nsIContent> endParent = do_QueryInterface(r->GetEndParent()); + if (!htmlEditor->IsTextNode(endParent)) { + continue; + } + nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(endParent); + if (textNode) { + int32_t offset = r->EndOffset(); + nsAutoString tempString; + textNode->GetData(tempString); + + if (0 < offset && offset < static_cast<int32_t>(tempString.Length())) { + // Split the text node. + nsCOMPtr<nsIDOMNode> tempNode; + nsresult rv = htmlEditor->SplitNode(endParent->AsDOMNode(), offset, + getter_AddRefs(tempNode)); + NS_ENSURE_SUCCESS(rv, rv); + + // Correct the range. + // The new end parent becomes the parent node of the text. + nsCOMPtr<nsIContent> newParent = endParent->GetParent(); + r->SetEnd(newParent, newParent->IndexOf(endParent)); + } + } + } + } + + // Bust up any inlines that cross our range endpoints, but only if we are + // allowed to touch content. + + if (aTouchContent == TouchContent::yes) { + nsTArray<OwningNonNull<RangeItem>> rangeItemArray; + rangeItemArray.AppendElements(rangeCount); + + // First register ranges for special editor gravity + for (int32_t i = 0; i < rangeCount; i++) { + rangeItemArray[i] = new RangeItem(); + rangeItemArray[i]->StoreRange(aArrayOfRanges[0]); + htmlEditor->mRangeUpdater.RegisterRangeItem(rangeItemArray[i]); + aArrayOfRanges.RemoveElementAt(0); + } + // Now bust up inlines. + nsresult rv = NS_OK; + for (auto& item : Reversed(rangeItemArray)) { + rv = BustUpInlinesAtRangeEndpoints(*item); + if (NS_FAILED(rv)) { + break; + } + } + // Then unregister the ranges + for (auto& item : rangeItemArray) { + htmlEditor->mRangeUpdater.DropRangeItem(item); + aArrayOfRanges.AppendElement(item->GetRange()); + } + NS_ENSURE_SUCCESS(rv, rv); + } + // Gather up a list of all the nodes + for (auto& range : aArrayOfRanges) { + DOMSubtreeIterator iter; + nsresult rv = iter.Init(*range); + NS_ENSURE_SUCCESS(rv, rv); + if (aOutArrayOfNodes.IsEmpty()) { + iter.AppendList(TrivialFunctor(), aOutArrayOfNodes); + } else { + // We don't want duplicates in aOutArrayOfNodes, so we use an + // iterator/functor that only return nodes that are not already in + // aOutArrayOfNodes. + nsTArray<OwningNonNull<nsINode>> nodes; + iter.AppendList(UniqueFunctor(aOutArrayOfNodes), nodes); + aOutArrayOfNodes.AppendElements(nodes); + } + } + + // Certain operations should not act on li's and td's, but rather inside + // them. Alter the list as needed. + if (aOperationType == EditAction::makeBasicBlock) { + for (int32_t i = aOutArrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> node = aOutArrayOfNodes[i]; + if (HTMLEditUtils::IsListItem(node)) { + int32_t j = i; + aOutArrayOfNodes.RemoveElementAt(i); + GetInnerContent(*node, aOutArrayOfNodes, &j); + } + } + } + // Indent/outdent already do something special for list items, but we still + // need to make sure we don't act on table elements + else if (aOperationType == EditAction::outdent || + aOperationType == EditAction::indent || + aOperationType == EditAction::setAbsolutePosition) { + for (int32_t i = aOutArrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> node = aOutArrayOfNodes[i]; + if (HTMLEditUtils::IsTableElementButNotTable(node)) { + int32_t j = i; + aOutArrayOfNodes.RemoveElementAt(i); + GetInnerContent(*node, aOutArrayOfNodes, &j); + } + } + } + // Outdent should look inside of divs. + if (aOperationType == EditAction::outdent && + !htmlEditor->IsCSSEnabled()) { + for (int32_t i = aOutArrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> node = aOutArrayOfNodes[i]; + if (node->IsHTMLElement(nsGkAtoms::div)) { + int32_t j = i; + aOutArrayOfNodes.RemoveElementAt(i); + GetInnerContent(*node, aOutArrayOfNodes, &j, Lists::no, Tables::no); + } + } + } + + + // Post-process the list to break up inline containers that contain br's, but + // only for operations that might care, like making lists or paragraphs + if (aOperationType == EditAction::makeBasicBlock || + aOperationType == EditAction::makeList || + aOperationType == EditAction::align || + aOperationType == EditAction::setAbsolutePosition || + aOperationType == EditAction::indent || + aOperationType == EditAction::outdent) { + for (int32_t i = aOutArrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> node = aOutArrayOfNodes[i]; + if (aTouchContent == TouchContent::yes && IsInlineNode(node) && + htmlEditor->IsContainer(node) && !htmlEditor->IsTextNode(node)) { + nsTArray<OwningNonNull<nsINode>> arrayOfInlines; + nsresult rv = BustUpInlinesAtBRs(*node->AsContent(), arrayOfInlines); + NS_ENSURE_SUCCESS(rv, rv); + + // Put these nodes in aOutArrayOfNodes, replacing the current node + aOutArrayOfNodes.RemoveElementAt(i); + aOutArrayOfNodes.InsertElementsAt(i, arrayOfInlines); + } + } + } + return NS_OK; +} + +void +HTMLEditRules::GetChildNodesForOperation( + nsINode& aNode, + nsTArray<OwningNonNull<nsINode>>& outArrayOfNodes) +{ + for (nsCOMPtr<nsIContent> child = aNode.GetFirstChild(); + child; child = child->GetNextSibling()) { + outArrayOfNodes.AppendElement(*child); + } +} + +nsresult +HTMLEditRules::GetListActionNodes( + nsTArray<OwningNonNull<nsINode>>& aOutArrayOfNodes, + EntireList aEntireList, + TouchContent aTouchContent) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + RefPtr<Selection> selection = htmlEditor->GetSelection(); + NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE); + + // Added this in so that ui code can ask to change an entire list, even if + // selection is only in part of it. used by list item dialog. + if (aEntireList == EntireList::yes) { + uint32_t rangeCount = selection->RangeCount(); + for (uint32_t rangeIdx = 0; rangeIdx < rangeCount; ++rangeIdx) { + RefPtr<nsRange> range = selection->GetRangeAt(rangeIdx); + for (nsCOMPtr<nsINode> parent = range->GetCommonAncestor(); + parent; parent = parent->GetParentNode()) { + if (HTMLEditUtils::IsList(parent)) { + aOutArrayOfNodes.AppendElement(*parent); + break; + } + } + } + // If we didn't find any nodes this way, then try the normal way. Perhaps + // the selection spans multiple lists but with no common list parent. + if (!aOutArrayOfNodes.IsEmpty()) { + return NS_OK; + } + } + + { + // We don't like other people messing with our selection! + AutoTransactionsConserveSelection dontSpazMySelection(htmlEditor); + + // contruct a list of nodes to act on. + nsresult rv = GetNodesFromSelection(*selection, EditAction::makeList, + aOutArrayOfNodes, aTouchContent); + NS_ENSURE_SUCCESS(rv, rv); + } + + // Pre-process our list of nodes + for (int32_t i = aOutArrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> testNode = aOutArrayOfNodes[i]; + + // Remove all non-editable nodes. Leave them be. + if (!htmlEditor->IsEditable(testNode)) { + aOutArrayOfNodes.RemoveElementAt(i); + continue; + } + + // Scan for table elements and divs. If we find table elements other than + // table, replace it with a list of any editable non-table content. + if (HTMLEditUtils::IsTableElementButNotTable(testNode)) { + int32_t j = i; + aOutArrayOfNodes.RemoveElementAt(i); + GetInnerContent(*testNode, aOutArrayOfNodes, &j, Lists::no); + } + } + + // If there is only one node in the array, and it is a list, div, or + // blockquote, then look inside of it until we find inner list or content. + LookInsideDivBQandList(aOutArrayOfNodes); + + return NS_OK; +} + +void +HTMLEditRules::LookInsideDivBQandList( + nsTArray<OwningNonNull<nsINode>>& aNodeArray) +{ + NS_ENSURE_TRUE(mHTMLEditor, ); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // If there is only one node in the array, and it is a list, div, or + // blockquote, then look inside of it until we find inner list or content. + if (aNodeArray.Length() != 1) { + return; + } + + OwningNonNull<nsINode> curNode = aNodeArray[0]; + + while (curNode->IsHTMLElement(nsGkAtoms::div) || + HTMLEditUtils::IsList(curNode) || + curNode->IsHTMLElement(nsGkAtoms::blockquote)) { + // Dive as long as there's only one child, and it's a list, div, blockquote + uint32_t numChildren = htmlEditor->CountEditableChildren(curNode); + if (numChildren != 1) { + break; + } + + // Keep diving! XXX One would expect to dive into the one editable node. + nsCOMPtr<nsIContent> child = curNode->GetFirstChild(); + if (!child->IsHTMLElement(nsGkAtoms::div) && + !HTMLEditUtils::IsList(child) && + !child->IsHTMLElement(nsGkAtoms::blockquote)) { + break; + } + + // check editability XXX floppy moose + curNode = child; + } + + // We've found innermost list/blockquote/div: replace the one node in the + // array with these nodes + aNodeArray.RemoveElementAt(0); + if (curNode->IsAnyOfHTMLElements(nsGkAtoms::div, + nsGkAtoms::blockquote)) { + int32_t j = 0; + GetInnerContent(*curNode, aNodeArray, &j, Lists::no, Tables::no); + return; + } + + aNodeArray.AppendElement(*curNode); +} + +void +HTMLEditRules::GetDefinitionListItemTypes(dom::Element* aElement, + bool* aDT, + bool* aDD) +{ + MOZ_ASSERT(aElement); + MOZ_ASSERT(aElement->IsHTMLElement(nsGkAtoms::dl)); + MOZ_ASSERT(aDT); + MOZ_ASSERT(aDD); + + *aDT = *aDD = false; + for (nsIContent* child = aElement->GetFirstChild(); + child; + child = child->GetNextSibling()) { + if (child->IsHTMLElement(nsGkAtoms::dt)) { + *aDT = true; + } else if (child->IsHTMLElement(nsGkAtoms::dd)) { + *aDD = true; + } + } +} + +nsresult +HTMLEditRules::GetParagraphFormatNodes( + nsTArray<OwningNonNull<nsINode>>& outArrayOfNodes, + TouchContent aTouchContent) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + RefPtr<Selection> selection = htmlEditor->GetSelection(); + NS_ENSURE_STATE(selection); + + // Contruct a list of nodes to act on. + nsresult rv = GetNodesFromSelection(*selection, EditAction::makeBasicBlock, + outArrayOfNodes, aTouchContent); + NS_ENSURE_SUCCESS(rv, rv); + + // Pre-process our list of nodes + for (int32_t i = outArrayOfNodes.Length() - 1; i >= 0; i--) { + OwningNonNull<nsINode> testNode = outArrayOfNodes[i]; + + // Remove all non-editable nodes. Leave them be. + if (!htmlEditor->IsEditable(testNode)) { + outArrayOfNodes.RemoveElementAt(i); + continue; + } + + // Scan for table elements. If we find table elements other than table, + // replace it with a list of any editable non-table content. Ditto for + // list elements. + if (HTMLEditUtils::IsTableElement(testNode) || + HTMLEditUtils::IsList(testNode) || + HTMLEditUtils::IsListItem(testNode)) { + int32_t j = i; + outArrayOfNodes.RemoveElementAt(i); + GetInnerContent(testNode, outArrayOfNodes, &j); + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::BustUpInlinesAtRangeEndpoints(RangeItem& item) +{ + bool isCollapsed = ((item.startNode == item.endNode) && (item.startOffset == item.endOffset)); + + nsCOMPtr<nsIContent> endInline = GetHighestInlineParent(*item.endNode); + + // if we have inline parents above range endpoints, split them + if (endInline && !isCollapsed) { + nsCOMPtr<nsINode> resultEndNode = endInline->GetParentNode(); + NS_ENSURE_STATE(mHTMLEditor); + // item.endNode must be content if endInline isn't null + int32_t resultEndOffset = + mHTMLEditor->SplitNodeDeep(*endInline, *item.endNode->AsContent(), + item.endOffset, + EditorBase::EmptyContainers::no); + NS_ENSURE_TRUE(resultEndOffset != -1, NS_ERROR_FAILURE); + // reset range + item.endNode = resultEndNode; + item.endOffset = resultEndOffset; + } + + nsCOMPtr<nsIContent> startInline = GetHighestInlineParent(*item.startNode); + + if (startInline) { + nsCOMPtr<nsINode> resultStartNode = startInline->GetParentNode(); + NS_ENSURE_STATE(mHTMLEditor); + int32_t resultStartOffset = + mHTMLEditor->SplitNodeDeep(*startInline, *item.startNode->AsContent(), + item.startOffset, + EditorBase::EmptyContainers::no); + NS_ENSURE_TRUE(resultStartOffset != -1, NS_ERROR_FAILURE); + // reset range + item.startNode = resultStartNode; + item.startOffset = resultStartOffset; + } + + return NS_OK; +} + +nsresult +HTMLEditRules::BustUpInlinesAtBRs( + nsIContent& aNode, + nsTArray<OwningNonNull<nsINode>>& aOutArrayOfNodes) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // First build up a list of all the break nodes inside the inline container. + nsTArray<OwningNonNull<nsINode>> arrayOfBreaks; + BRNodeFunctor functor; + DOMIterator iter(aNode); + iter.AppendList(functor, arrayOfBreaks); + + // If there aren't any breaks, just put inNode itself in the array + if (arrayOfBreaks.IsEmpty()) { + aOutArrayOfNodes.AppendElement(aNode); + return NS_OK; + } + + // Else we need to bust up inNode along all the breaks + nsCOMPtr<nsINode> inlineParentNode = aNode.GetParentNode(); + nsCOMPtr<nsIContent> splitDeepNode = &aNode; + nsCOMPtr<nsIContent> leftNode, rightNode; + + for (uint32_t i = 0; i < arrayOfBreaks.Length(); i++) { + OwningNonNull<Element> breakNode = *arrayOfBreaks[i]->AsElement(); + NS_ENSURE_TRUE(splitDeepNode, NS_ERROR_NULL_POINTER); + NS_ENSURE_TRUE(breakNode->GetParent(), NS_ERROR_NULL_POINTER); + OwningNonNull<nsIContent> splitParentNode = *breakNode->GetParent(); + int32_t splitOffset = splitParentNode->IndexOf(breakNode); + + int32_t resultOffset = + htmlEditor->SplitNodeDeep(*splitDeepNode, splitParentNode, splitOffset, + HTMLEditor::EmptyContainers::yes, + getter_AddRefs(leftNode), + getter_AddRefs(rightNode)); + NS_ENSURE_STATE(resultOffset != -1); + + // Put left node in node list + if (leftNode) { + // Might not be a left node. A break might have been at the very + // beginning of inline container, in which case SplitNodeDeep would not + // actually split anything + aOutArrayOfNodes.AppendElement(*leftNode); + } + // Move break outside of container and also put in node list + nsresult rv = + htmlEditor->MoveNode(breakNode, inlineParentNode, resultOffset); + NS_ENSURE_SUCCESS(rv, rv); + aOutArrayOfNodes.AppendElement(*breakNode); + + // Now rightNode becomes the new node to split + splitDeepNode = rightNode; + } + // Now tack on remaining rightNode, if any, to the list + if (rightNode) { + aOutArrayOfNodes.AppendElement(*rightNode); + } + return NS_OK; +} + +nsIContent* +HTMLEditRules::GetHighestInlineParent(nsINode& aNode) +{ + if (!aNode.IsContent() || IsBlockNode(aNode)) { + return nullptr; + } + OwningNonNull<nsIContent> node = *aNode.AsContent(); + + while (node->GetParent() && IsInlineNode(*node->GetParent())) { + node = *node->GetParent(); + } + return node; +} + +/** + * GetNodesFromPoint() constructs a list of nodes from a point that will be + * operated on. + */ +nsresult +HTMLEditRules::GetNodesFromPoint( + EditorDOMPoint aPoint, + EditAction aOperation, + nsTArray<OwningNonNull<nsINode>>& outArrayOfNodes, + TouchContent aTouchContent) +{ + NS_ENSURE_STATE(aPoint.node); + RefPtr<nsRange> range = new nsRange(aPoint.node); + nsresult rv = range->SetStart(aPoint.node, aPoint.offset); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + + // Expand the range to include adjacent inlines + PromoteRange(*range, aOperation); + + // Make array of ranges + nsTArray<RefPtr<nsRange>> arrayOfRanges; + + // Stuff new opRange into array + arrayOfRanges.AppendElement(range); + + // Use these ranges to contruct a list of nodes to act on + rv = GetNodesForOperation(arrayOfRanges, outArrayOfNodes, aOperation, + aTouchContent); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +/** + * GetNodesFromSelection() constructs a list of nodes from the selection that + * will be operated on. + */ +nsresult +HTMLEditRules::GetNodesFromSelection( + Selection& aSelection, + EditAction aOperation, + nsTArray<OwningNonNull<nsINode>>& outArrayOfNodes, + TouchContent aTouchContent) +{ + // Promote selection ranges + nsTArray<RefPtr<nsRange>> arrayOfRanges; + GetPromotedRanges(aSelection, arrayOfRanges, aOperation); + + // Use these ranges to contruct a list of nodes to act on. + nsresult rv = GetNodesForOperation(arrayOfRanges, outArrayOfNodes, + aOperation, aTouchContent); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +/** + * MakeTransitionList() detects all the transitions in the array, where a + * transition means that adjacent nodes in the array don't have the same parent. + */ +void +HTMLEditRules::MakeTransitionList(nsTArray<OwningNonNull<nsINode>>& aNodeArray, + nsTArray<bool>& aTransitionArray) +{ + nsCOMPtr<nsINode> prevParent; + + aTransitionArray.EnsureLengthAtLeast(aNodeArray.Length()); + for (uint32_t i = 0; i < aNodeArray.Length(); i++) { + if (aNodeArray[i]->GetParentNode() != prevParent) { + // Different parents: transition point + aTransitionArray[i] = true; + } else { + // Same parents: these nodes grew up together + aTransitionArray[i] = false; + } + prevParent = aNodeArray[i]->GetParentNode(); + } +} + +/** + * If aNode is the descendant of a listitem, return that li. But table element + * boundaries are stoppers on the search. Also stops on the active editor host + * (contenteditable). Also test if aNode is an li itself. + */ +Element* +HTMLEditRules::IsInListItem(nsINode* aNode) +{ + NS_ENSURE_TRUE(aNode, nullptr); + if (HTMLEditUtils::IsListItem(aNode)) { + return aNode->AsElement(); + } + + Element* parent = aNode->GetParentElement(); + while (parent && + mHTMLEditor && mHTMLEditor->IsDescendantOfEditorRoot(parent) && + !HTMLEditUtils::IsTableElement(parent)) { + if (HTMLEditUtils::IsListItem(parent)) { + return parent; + } + parent = parent->GetParentElement(); + } + return nullptr; +} + +/** + * ReturnInHeader: do the right thing for returns pressed in headers + */ +nsresult +HTMLEditRules::ReturnInHeader(Selection& aSelection, + Element& aHeader, + nsINode& aNode, + int32_t aOffset) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Remember where the header is + nsCOMPtr<nsINode> headerParent = aHeader.GetParentNode(); + int32_t offset = headerParent ? headerParent->IndexOf(&aHeader) : -1; + + // Get ws code to adjust any ws + nsCOMPtr<nsINode> node = &aNode; + nsresult rv = WSRunObject::PrepareToSplitAcrossBlocks(htmlEditor, + address_of(node), + &aOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // Split the header + NS_ENSURE_STATE(node->IsContent()); + htmlEditor->SplitNodeDeep(aHeader, *node->AsContent(), aOffset); + + // If the left-hand heading is empty, put a mozbr in it + nsCOMPtr<nsIContent> prevItem = htmlEditor->GetPriorHTMLSibling(&aHeader); + if (prevItem && HTMLEditUtils::IsHeader(*prevItem)) { + bool isEmptyNode; + rv = htmlEditor->IsEmptyNode(prevItem, &isEmptyNode); + NS_ENSURE_SUCCESS(rv, rv); + if (isEmptyNode) { + rv = CreateMozBR(prevItem->AsDOMNode(), 0); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + // If the new (righthand) header node is empty, delete it + bool isEmpty; + rv = IsEmptyBlock(aHeader, &isEmpty, MozBRCounts::no); + NS_ENSURE_SUCCESS(rv, rv); + if (isEmpty) { + rv = htmlEditor->DeleteNode(&aHeader); + NS_ENSURE_SUCCESS(rv, rv); + // Layout tells the caret to blink in a weird place if we don't place a + // break after the header. + nsCOMPtr<nsIContent> sibling = + htmlEditor->GetNextHTMLSibling(headerParent, offset + 1); + if (!sibling || !sibling->IsHTMLElement(nsGkAtoms::br)) { + ClearCachedStyles(); + htmlEditor->mTypeInState->ClearAllProps(); + + // Create a paragraph + nsCOMPtr<Element> pNode = + htmlEditor->CreateNode(nsGkAtoms::p, headerParent, offset + 1); + NS_ENSURE_STATE(pNode); + + // Append a <br> to it + nsCOMPtr<Element> brNode = htmlEditor->CreateBR(pNode, 0); + NS_ENSURE_STATE(brNode); + + // Set selection to before the break + rv = aSelection.Collapse(pNode, 0); + NS_ENSURE_SUCCESS(rv, rv); + } else { + headerParent = sibling->GetParentNode(); + offset = headerParent ? headerParent->IndexOf(sibling) : -1; + // Put selection after break + rv = aSelection.Collapse(headerParent, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + } + } else { + // Put selection at front of righthand heading + rv = aSelection.Collapse(&aHeader, 0); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +/** + * ReturnInParagraph() does the right thing for returns pressed in paragraphs. + */ +nsresult +HTMLEditRules::ReturnInParagraph(Selection* aSelection, + nsIDOMNode* aPara, + nsIDOMNode* aNode, + int32_t aOffset, + bool* aCancel, + bool* aHandled) +{ + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + if (!aSelection || !aPara || !node || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + *aCancel = false; + *aHandled = false; + + int32_t offset; + nsCOMPtr<nsINode> parent = EditorBase::GetNodeLocation(node, &offset); + + NS_ENSURE_STATE(mHTMLEditor); + bool doesCRCreateNewP = mHTMLEditor->GetReturnInParagraphCreatesNewParagraph(); + + bool newBRneeded = false; + bool newSelNode = false; + nsCOMPtr<nsIContent> sibling; + nsCOMPtr<nsIDOMNode> selNode = aNode; + int32_t selOffset = aOffset; + + NS_ENSURE_STATE(mHTMLEditor); + if (aNode == aPara && doesCRCreateNewP) { + // we are at the edges of the block, newBRneeded not needed! + sibling = node->AsContent(); + } else if (mHTMLEditor->IsTextNode(aNode)) { + nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(aNode); + uint32_t strLength; + nsresult rv = textNode->GetLength(&strLength); + NS_ENSURE_SUCCESS(rv, rv); + + // at beginning of text node? + if (!aOffset) { + // is there a BR prior to it? + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetPriorHTMLSibling(node); + if (!sibling || !mHTMLEditor || !mHTMLEditor->IsVisBreak(sibling) || + TextEditUtils::HasMozAttr(GetAsDOMNode(sibling))) { + NS_ENSURE_STATE(mHTMLEditor); + newBRneeded = true; + } + } else if (aOffset == (int32_t)strLength) { + // we're at the end of text node... + // is there a BR after to it? + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->GetNextHTMLSibling(node); + if (!sibling || !mHTMLEditor || !mHTMLEditor->IsVisBreak(sibling) || + TextEditUtils::HasMozAttr(GetAsDOMNode(sibling))) { + NS_ENSURE_STATE(mHTMLEditor); + newBRneeded = true; + offset++; + } + } else { + if (doesCRCreateNewP) { + nsCOMPtr<nsIDOMNode> tmp; + rv = mTextEditor->SplitNode(aNode, aOffset, getter_AddRefs(tmp)); + NS_ENSURE_SUCCESS(rv, rv); + selNode = tmp; + } + + newBRneeded = true; + offset++; + } + } else { + // not in a text node. + // is there a BR prior to it? + nsCOMPtr<nsIContent> nearNode; + NS_ENSURE_STATE(mHTMLEditor); + nearNode = mHTMLEditor->GetPriorHTMLNode(node, aOffset); + NS_ENSURE_STATE(mHTMLEditor); + if (!nearNode || !mHTMLEditor->IsVisBreak(nearNode) || + TextEditUtils::HasMozAttr(GetAsDOMNode(nearNode))) { + // is there a BR after it? + NS_ENSURE_STATE(mHTMLEditor); + nearNode = mHTMLEditor->GetNextHTMLNode(node, aOffset); + NS_ENSURE_STATE(mHTMLEditor); + if (!nearNode || !mHTMLEditor->IsVisBreak(nearNode) || + TextEditUtils::HasMozAttr(GetAsDOMNode(nearNode))) { + newBRneeded = true; + parent = node; + offset = aOffset; + newSelNode = true; + } + } + if (!newBRneeded) { + sibling = nearNode; + } + } + if (newBRneeded) { + // if CR does not create a new P, default to BR creation + NS_ENSURE_TRUE(doesCRCreateNewP, NS_OK); + + NS_ENSURE_STATE(mHTMLEditor); + sibling = mHTMLEditor->CreateBR(parent, offset); + if (newSelNode) { + // We split the parent after the br we've just inserted. + selNode = GetAsDOMNode(parent); + selOffset = offset + 1; + } + } + *aHandled = true; + return SplitParagraph(aPara, sibling, aSelection, address_of(selNode), &selOffset); +} + +/** + * SplitParagraph() splits a paragraph at selection point, possibly deleting a + * br. + */ +nsresult +HTMLEditRules::SplitParagraph(nsIDOMNode *aPara, + nsIContent* aBRNode, + Selection* aSelection, + nsCOMPtr<nsIDOMNode>* aSelNode, + int32_t* aOffset) +{ + nsCOMPtr<Element> para = do_QueryInterface(aPara); + NS_ENSURE_TRUE(para && aBRNode && aSelNode && *aSelNode && aOffset && + aSelection, NS_ERROR_NULL_POINTER); + + // split para + // get ws code to adjust any ws + nsCOMPtr<nsIContent> leftPara, rightPara; + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsINode> selNode(do_QueryInterface(*aSelNode)); + nsresult rv = + WSRunObject::PrepareToSplitAcrossBlocks(mHTMLEditor, + address_of(selNode), aOffset); + // XXX When it fails, why do we need to return selection node? (Why can the + // caller trust the result even when it returns error?) + *aSelNode = GetAsDOMNode(selNode); + NS_ENSURE_SUCCESS(rv, rv); + // split the paragraph + NS_ENSURE_STATE(mHTMLEditor); + NS_ENSURE_STATE(selNode->IsContent()); + mHTMLEditor->SplitNodeDeep(*para, *selNode->AsContent(), *aOffset, + HTMLEditor::EmptyContainers::yes, + getter_AddRefs(leftPara), + getter_AddRefs(rightPara)); + // get rid of the break, if it is visible (otherwise it may be needed to prevent an empty p) + NS_ENSURE_STATE(mHTMLEditor); + if (mHTMLEditor->IsVisBreak(aBRNode)) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->DeleteNode(aBRNode); + NS_ENSURE_SUCCESS(rv, rv); + } + + // remove ID attribute on the paragraph we just created + nsCOMPtr<nsIDOMElement> rightElt = do_QueryInterface(rightPara); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->RemoveAttribute(rightElt, NS_LITERAL_STRING("id")); + NS_ENSURE_SUCCESS(rv, rv); + + // check both halves of para to see if we need mozBR + rv = InsertMozBRIfNeeded(*leftPara); + NS_ENSURE_SUCCESS(rv, rv); + rv = InsertMozBRIfNeeded(*rightPara); + NS_ENSURE_SUCCESS(rv, rv); + + // selection to beginning of right hand para; + // look inside any containers that are up front. + nsCOMPtr<nsINode> rightParaNode = do_QueryInterface(rightPara); + NS_ENSURE_STATE(mHTMLEditor && rightParaNode); + nsCOMPtr<nsIDOMNode> child = + GetAsDOMNode(mHTMLEditor->GetLeftmostChild(rightParaNode, true)); + if (mHTMLEditor->IsTextNode(child) || + mHTMLEditor->IsContainer(child)) { + aSelection->Collapse(child,0); + } else { + int32_t offset; + nsCOMPtr<nsIDOMNode> parent = EditorBase::GetNodeLocation(child, &offset); + aSelection->Collapse(parent,offset); + } + return NS_OK; +} + +/** + * ReturnInListItem: do the right thing for returns pressed in list items + */ +nsresult +HTMLEditRules::ReturnInListItem(Selection& aSelection, + Element& aListItem, + nsINode& aNode, + int32_t aOffset) +{ + MOZ_ASSERT(HTMLEditUtils::IsListItem(&aListItem)); + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Get the item parent and the active editing host. + nsCOMPtr<Element> root = htmlEditor->GetActiveEditingHost(); + + nsCOMPtr<Element> list = aListItem.GetParentElement(); + int32_t itemOffset = list ? list->IndexOf(&aListItem) : -1; + + // If we are in an empty item, then we want to pop up out of the list, but + // only if prefs say it's okay and if the parent isn't the active editing + // host. + bool isEmpty; + nsresult rv = IsEmptyBlock(aListItem, &isEmpty, MozBRCounts::no); + NS_ENSURE_SUCCESS(rv, rv); + if (isEmpty && root != list && mReturnInEmptyLIKillsList) { + // Get the list offset now -- before we might eventually split the list + nsCOMPtr<nsINode> listParent = list->GetParentNode(); + int32_t offset = listParent ? listParent->IndexOf(list) : -1; + + // Are we the last list item in the list? + bool isLast; + rv = htmlEditor->IsLastEditableChild(aListItem.AsDOMNode(), &isLast); + NS_ENSURE_SUCCESS(rv, rv); + if (!isLast) { + // We need to split the list! + ErrorResult rv; + htmlEditor->SplitNode(*list, itemOffset, rv); + NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult()); + } + + // Are we in a sublist? + if (HTMLEditUtils::IsList(listParent)) { + // If so, move item out of this list and into the grandparent list + rv = htmlEditor->MoveNode(&aListItem, listParent, offset + 1); + NS_ENSURE_SUCCESS(rv, rv); + rv = aSelection.Collapse(&aListItem, 0); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Otherwise kill this item + rv = htmlEditor->DeleteNode(&aListItem); + NS_ENSURE_SUCCESS(rv, rv); + + // Time to insert a paragraph + nsCOMPtr<Element> pNode = + htmlEditor->CreateNode(nsGkAtoms::p, listParent, offset + 1); + NS_ENSURE_STATE(pNode); + + // Append a <br> to it + nsCOMPtr<Element> brNode = htmlEditor->CreateBR(pNode, 0); + NS_ENSURE_STATE(brNode); + + // Set selection to before the break + rv = aSelection.Collapse(pNode, 0); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; + } + + // Else we want a new list item at the same list level. Get ws code to + // adjust any ws. + nsCOMPtr<nsINode> selNode = &aNode; + rv = WSRunObject::PrepareToSplitAcrossBlocks(htmlEditor, + address_of(selNode), &aOffset); + NS_ENSURE_SUCCESS(rv, rv); + // Now split list item + NS_ENSURE_STATE(selNode->IsContent()); + htmlEditor->SplitNodeDeep(aListItem, *selNode->AsContent(), aOffset); + + // Hack: until I can change the damaged doc range code back to being + // extra-inclusive, I have to manually detect certain list items that may be + // left empty. + nsCOMPtr<nsIContent> prevItem = htmlEditor->GetPriorHTMLSibling(&aListItem); + if (prevItem && HTMLEditUtils::IsListItem(prevItem)) { + bool isEmptyNode; + rv = htmlEditor->IsEmptyNode(prevItem, &isEmptyNode); + NS_ENSURE_SUCCESS(rv, rv); + if (isEmptyNode) { + rv = CreateMozBR(prevItem->AsDOMNode(), 0); + NS_ENSURE_SUCCESS(rv, rv); + } else { + rv = htmlEditor->IsEmptyNode(&aListItem, &isEmptyNode, true); + NS_ENSURE_SUCCESS(rv, rv); + if (isEmptyNode) { + nsCOMPtr<nsIAtom> nodeAtom = aListItem.NodeInfo()->NameAtom(); + if (nodeAtom == nsGkAtoms::dd || nodeAtom == nsGkAtoms::dt) { + nsCOMPtr<nsINode> list = aListItem.GetParentNode(); + int32_t itemOffset = list ? list->IndexOf(&aListItem) : -1; + + nsIAtom* listAtom = nodeAtom == nsGkAtoms::dt ? nsGkAtoms::dd + : nsGkAtoms::dt; + nsCOMPtr<Element> newListItem = + htmlEditor->CreateNode(listAtom, list, itemOffset + 1); + NS_ENSURE_STATE(newListItem); + rv = mTextEditor->DeleteNode(&aListItem); + NS_ENSURE_SUCCESS(rv, rv); + rv = aSelection.Collapse(newListItem, 0); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; + } + + nsCOMPtr<Element> brNode; + rv = htmlEditor->CopyLastEditableChildStyles(GetAsDOMNode(prevItem), + GetAsDOMNode(&aListItem), + getter_AddRefs(brNode)); + NS_ENSURE_SUCCESS(rv, rv); + if (brNode) { + nsCOMPtr<nsINode> brParent = brNode->GetParentNode(); + int32_t offset = brParent ? brParent->IndexOf(brNode) : -1; + rv = aSelection.Collapse(brParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + } else { + WSRunObject wsObj(htmlEditor, &aListItem, 0); + nsCOMPtr<nsINode> visNode; + int32_t visOffset = 0; + WSType wsType; + wsObj.NextVisibleNode(&aListItem, 0, address_of(visNode), + &visOffset, &wsType); + if (wsType == WSType::special || wsType == WSType::br || + visNode->IsHTMLElement(nsGkAtoms::hr)) { + nsCOMPtr<nsINode> parent = visNode->GetParentNode(); + int32_t offset = parent ? parent->IndexOf(visNode) : -1; + rv = aSelection.Collapse(parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } else { + rv = aSelection.Collapse(visNode, visOffset); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + } + } + } + rv = aSelection.Collapse(&aListItem, 0); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; +} + +/** + * MakeBlockquote() puts the list of nodes into one or more blockquotes. + */ +nsresult +HTMLEditRules::MakeBlockquote(nsTArray<OwningNonNull<nsINode>>& aNodeArray) +{ + // The idea here is to put the nodes into a minimal number of blockquotes. + // When the user blockquotes something, they expect one blockquote. That may + // not be possible (for instance, if they have two table cells selected, you + // need two blockquotes inside the cells). + nsCOMPtr<Element> curBlock; + nsCOMPtr<nsINode> prevParent; + + for (auto& curNode : aNodeArray) { + // Get the node to act on, and its location + NS_ENSURE_STATE(curNode->IsContent()); + + // If the node is a table element or list item, dive inside + if (HTMLEditUtils::IsTableElementButNotTable(curNode) || + HTMLEditUtils::IsListItem(curNode)) { + // Forget any previous block + curBlock = nullptr; + // Recursion time + nsTArray<OwningNonNull<nsINode>> childArray; + GetChildNodesForOperation(*curNode, childArray); + nsresult rv = MakeBlockquote(childArray); + NS_ENSURE_SUCCESS(rv, rv); + } + + // If the node has different parent than previous node, further nodes in a + // new parent + if (prevParent) { + if (prevParent != curNode->GetParentNode()) { + // Forget any previous blockquote node we were using + curBlock = nullptr; + prevParent = curNode->GetParentNode(); + } + } else { + prevParent = curNode->GetParentNode(); + } + + // If no curBlock, make one + if (!curBlock) { + nsCOMPtr<nsINode> curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + nsresult rv = SplitAsNeeded(*nsGkAtoms::blockquote, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + curBlock = mHTMLEditor->CreateNode(nsGkAtoms::blockquote, curParent, + offset); + NS_ENSURE_STATE(curBlock); + // remember our new block for postprocessing + mNewBlock = curBlock; + // note: doesn't matter if we set mNewBlock multiple times. + } + + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->MoveNode(curNode->AsContent(), curBlock, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +/** + * RemoveBlockStyle() makes the nodes have no special block type. + */ +nsresult +HTMLEditRules::RemoveBlockStyle(nsTArray<OwningNonNull<nsINode>>& aNodeArray) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Intent of this routine is to be used for converting to/from headers, + // paragraphs, pre, and address. Those blocks that pretty much just contain + // inline things... + nsCOMPtr<Element> curBlock; + nsCOMPtr<nsIContent> firstNode, lastNode; + for (auto& curNode : aNodeArray) { + // If curNode is a address, p, header, address, or pre, remove it + if (HTMLEditUtils::IsFormatNode(curNode)) { + // Process any partial progress saved + if (curBlock) { + nsresult rv = RemovePartOfBlock(*curBlock, *firstNode, *lastNode); + NS_ENSURE_SUCCESS(rv, rv); + firstNode = lastNode = curBlock = nullptr; + } + // Remove current block + nsresult rv = htmlEditor->RemoveBlockContainer(*curNode->AsContent()); + NS_ENSURE_SUCCESS(rv, rv); + } else if (curNode->IsAnyOfHTMLElements(nsGkAtoms::table, + nsGkAtoms::tr, + nsGkAtoms::tbody, + nsGkAtoms::td, + nsGkAtoms::li, + nsGkAtoms::blockquote, + nsGkAtoms::div) || + HTMLEditUtils::IsList(curNode)) { + // Process any partial progress saved + if (curBlock) { + nsresult rv = RemovePartOfBlock(*curBlock, *firstNode, *lastNode); + NS_ENSURE_SUCCESS(rv, rv); + firstNode = lastNode = curBlock = nullptr; + } + // Recursion time + nsTArray<OwningNonNull<nsINode>> childArray; + GetChildNodesForOperation(*curNode, childArray); + nsresult rv = RemoveBlockStyle(childArray); + NS_ENSURE_SUCCESS(rv, rv); + } else if (IsInlineNode(curNode)) { + if (curBlock) { + // If so, is this node a descendant? + if (EditorUtils::IsDescendantOf(curNode, curBlock)) { + // Then we don't need to do anything different for this node + lastNode = curNode->AsContent(); + continue; + } + // Otherwise, we have progressed beyond end of curBlock, so let's + // handle it now. We need to remove the portion of curBlock that + // contains [firstNode - lastNode]. + nsresult rv = RemovePartOfBlock(*curBlock, *firstNode, *lastNode); + NS_ENSURE_SUCCESS(rv, rv); + firstNode = lastNode = curBlock = nullptr; + // Fall out and handle curNode + } + curBlock = htmlEditor->GetBlockNodeParent(curNode); + if (curBlock && HTMLEditUtils::IsFormatNode(curBlock)) { + firstNode = lastNode = curNode->AsContent(); + } else { + // Not a block kind that we care about. + curBlock = nullptr; + } + } else if (curBlock) { + // Some node that is already sans block style. Skip over it and process + // any partial progress saved. + nsresult rv = RemovePartOfBlock(*curBlock, *firstNode, *lastNode); + NS_ENSURE_SUCCESS(rv, rv); + firstNode = lastNode = curBlock = nullptr; + } + } + // Process any partial progress saved + if (curBlock) { + nsresult rv = RemovePartOfBlock(*curBlock, *firstNode, *lastNode); + NS_ENSURE_SUCCESS(rv, rv); + firstNode = lastNode = curBlock = nullptr; + } + return NS_OK; +} + +/** + * ApplyBlockStyle() does whatever it takes to make the list of nodes into one + * or more blocks of type aBlockTag. + */ +nsresult +HTMLEditRules::ApplyBlockStyle(nsTArray<OwningNonNull<nsINode>>& aNodeArray, + nsIAtom& aBlockTag) +{ + // Intent of this routine is to be used for converting to/from headers, + // paragraphs, pre, and address. Those blocks that pretty much just contain + // inline things... + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Remove all non-editable nodes. Leave them be. + for (int32_t i = aNodeArray.Length() - 1; i >= 0; i--) { + if (!htmlEditor->IsEditable(aNodeArray[i])) { + aNodeArray.RemoveElementAt(i); + } + } + + nsCOMPtr<Element> newBlock; + + nsCOMPtr<Element> curBlock; + for (auto& curNode : aNodeArray) { + nsCOMPtr<nsINode> curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + + // Is it already the right kind of block? + if (curNode->IsHTMLElement(&aBlockTag)) { + // Forget any previous block used for previous inline nodes + curBlock = nullptr; + // Do nothing to this block + continue; + } + + // If curNode is a address, p, header, address, or pre, replace it with a + // new block of correct type. + // XXX: pre can't hold everything the others can + if (HTMLEditUtils::IsMozDiv(curNode) || + HTMLEditUtils::IsFormatNode(curNode)) { + // Forget any previous block used for previous inline nodes + curBlock = nullptr; + newBlock = htmlEditor->ReplaceContainer(curNode->AsElement(), + &aBlockTag, nullptr, nullptr, + EditorBase::eCloneAttributes); + NS_ENSURE_STATE(newBlock); + } else if (HTMLEditUtils::IsTable(curNode) || + HTMLEditUtils::IsList(curNode) || + curNode->IsAnyOfHTMLElements(nsGkAtoms::tbody, + nsGkAtoms::tr, + nsGkAtoms::td, + nsGkAtoms::li, + nsGkAtoms::blockquote, + nsGkAtoms::div)) { + // Forget any previous block used for previous inline nodes + curBlock = nullptr; + // Recursion time + nsTArray<OwningNonNull<nsINode>> childArray; + GetChildNodesForOperation(*curNode, childArray); + if (!childArray.IsEmpty()) { + nsresult rv = ApplyBlockStyle(childArray, aBlockTag); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Make sure we can put a block here + nsresult rv = SplitAsNeeded(aBlockTag, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<Element> theBlock = + htmlEditor->CreateNode(&aBlockTag, curParent, offset); + NS_ENSURE_STATE(theBlock); + // Remember our new block for postprocessing + mNewBlock = theBlock; + } + } else if (curNode->IsHTMLElement(nsGkAtoms::br)) { + // If the node is a break, we honor it by putting further nodes in a new + // parent + if (curBlock) { + // Forget any previous block used for previous inline nodes + curBlock = nullptr; + nsresult rv = htmlEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // The break is the first (or even only) node we encountered. Create a + // block for it. + nsresult rv = SplitAsNeeded(aBlockTag, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + curBlock = htmlEditor->CreateNode(&aBlockTag, curParent, offset); + NS_ENSURE_STATE(curBlock); + // Remember our new block for postprocessing + mNewBlock = curBlock; + // Note: doesn't matter if we set mNewBlock multiple times. + rv = htmlEditor->MoveNode(curNode->AsContent(), curBlock, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + } else if (IsInlineNode(curNode)) { + // If curNode is inline, pull it into curBlock. Note: it's assumed that + // consecutive inline nodes in aNodeArray are actually members of the + // same block parent. This happens to be true now as a side effect of + // how aNodeArray is contructed, but some additional logic should be + // added here if that should change + // + // If curNode is a non editable, drop it if we are going to <pre>. + if (&aBlockTag == nsGkAtoms::pre && !htmlEditor->IsEditable(curNode)) { + // Do nothing to this block + continue; + } + + // If no curBlock, make one + if (!curBlock) { + nsresult rv = SplitAsNeeded(aBlockTag, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + curBlock = htmlEditor->CreateNode(&aBlockTag, curParent, offset); + NS_ENSURE_STATE(curBlock); + // Remember our new block for postprocessing + mNewBlock = curBlock; + // Note: doesn't matter if we set mNewBlock multiple times. + } + + // XXX If curNode is a br, replace it with a return if going to <pre> + + // This is a continuation of some inline nodes that belong together in + // the same block item. Use curBlock. + nsresult rv = htmlEditor->MoveNode(curNode->AsContent(), curBlock, -1); + NS_ENSURE_SUCCESS(rv, rv); + } + } + return NS_OK; +} + +/** + * Given a tag name, split inOutParent up to the point where we can insert the + * tag. Adjust inOutParent and inOutOffset to point to new location for tag. + */ +nsresult +HTMLEditRules::SplitAsNeeded(nsIAtom& aTag, + OwningNonNull<nsINode>& aInOutParent, + int32_t& aInOutOffset) +{ + // XXX Is there a better way to do this? + nsCOMPtr<nsINode> parent = aInOutParent.forget(); + nsresult rv = SplitAsNeeded(aTag, parent, aInOutOffset); + aInOutParent = parent.forget(); + return rv; +} + +nsresult +HTMLEditRules::SplitAsNeeded(nsIAtom& aTag, + nsCOMPtr<nsINode>& inOutParent, + int32_t& inOutOffset) +{ + NS_ENSURE_TRUE(inOutParent, NS_ERROR_NULL_POINTER); + + // Check that we have a place that can legally contain the tag + nsCOMPtr<nsINode> tagParent, splitNode; + for (nsCOMPtr<nsINode> parent = inOutParent; parent; + parent = parent->GetParentNode()) { + // Sniffing up the parent tree until we find a legal place for the block + + // Don't leave the active editing host + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsDescendantOfEditorRoot(parent)) { + // XXX Why do we need to check mHTMLEditor again here? + NS_ENSURE_STATE(mHTMLEditor); + if (parent != mHTMLEditor->GetActiveEditingHost()) { + return NS_ERROR_FAILURE; + } + } + + NS_ENSURE_STATE(mHTMLEditor); + if (mHTMLEditor->CanContainTag(*parent, aTag)) { + // Success + tagParent = parent; + break; + } + + splitNode = parent; + } + if (!tagParent) { + // Could not find a place to build tag! + return NS_ERROR_FAILURE; + } + if (splitNode && splitNode->IsContent() && inOutParent->IsContent()) { + // We found a place for block, but above inOutParent. We need to split. + NS_ENSURE_STATE(mHTMLEditor); + int32_t offset = mHTMLEditor->SplitNodeDeep(*splitNode->AsContent(), + *inOutParent->AsContent(), + inOutOffset); + NS_ENSURE_STATE(offset != -1); + inOutParent = tagParent; + inOutOffset = offset; + } + return NS_OK; +} + +/** + * JoinNodesSmart: Join two nodes, doing whatever makes sense for their + * children (which often means joining them, too). aNodeLeft & aNodeRight must + * be same type of node. + * + * Returns the point where they're merged, or (nullptr, -1) on failure. + */ +EditorDOMPoint +HTMLEditRules::JoinNodesSmart(nsIContent& aNodeLeft, + nsIContent& aNodeRight) +{ + // Caller responsible for left and right node being the same type + nsCOMPtr<nsINode> parent = aNodeLeft.GetParentNode(); + NS_ENSURE_TRUE(parent, EditorDOMPoint()); + int32_t parOffset = parent->IndexOf(&aNodeLeft); + nsCOMPtr<nsINode> rightParent = aNodeRight.GetParentNode(); + + // If they don't have the same parent, first move the right node to after the + // left one + if (parent != rightParent) { + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + nsresult rv = mHTMLEditor->MoveNode(&aNodeRight, parent, parOffset); + NS_ENSURE_SUCCESS(rv, EditorDOMPoint()); + } + + EditorDOMPoint ret(&aNodeRight, aNodeLeft.Length()); + + // Separate join rules for differing blocks + if (HTMLEditUtils::IsList(&aNodeLeft) || aNodeLeft.GetAsText()) { + // For lists, merge shallow (wouldn't want to combine list items) + nsresult rv = mHTMLEditor->JoinNodes(aNodeLeft, aNodeRight); + NS_ENSURE_SUCCESS(rv, EditorDOMPoint()); + return ret; + } + + // Remember the last left child, and first right child + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + nsCOMPtr<nsIContent> lastLeft = mHTMLEditor->GetLastEditableChild(aNodeLeft); + NS_ENSURE_TRUE(lastLeft, EditorDOMPoint()); + + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + nsCOMPtr<nsIContent> firstRight = mHTMLEditor->GetFirstEditableChild(aNodeRight); + NS_ENSURE_TRUE(firstRight, EditorDOMPoint()); + + // For list items, divs, etc., merge smart + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + nsresult rv = mHTMLEditor->JoinNodes(aNodeLeft, aNodeRight); + NS_ENSURE_SUCCESS(rv, EditorDOMPoint()); + + if (lastLeft && firstRight && mHTMLEditor && + mHTMLEditor->AreNodesSameType(lastLeft, firstRight) && + (lastLeft->GetAsText() || !mHTMLEditor || + (lastLeft->IsElement() && firstRight->IsElement() && + mHTMLEditor->mCSSEditUtils->ElementsSameStyle(lastLeft->AsElement(), + firstRight->AsElement())))) { + NS_ENSURE_TRUE(mHTMLEditor, EditorDOMPoint()); + return JoinNodesSmart(*lastLeft, *firstRight); + } + return ret; +} + +Element* +HTMLEditRules::GetTopEnclosingMailCite(nsINode& aNode) +{ + nsCOMPtr<Element> ret; + + for (nsCOMPtr<nsINode> node = &aNode; node; node = node->GetParentNode()) { + if ((IsPlaintextEditor() && node->IsHTMLElement(nsGkAtoms::pre)) || + HTMLEditUtils::IsMailCite(node)) { + ret = node->AsElement(); + } + if (node->IsHTMLElement(nsGkAtoms::body)) { + break; + } + } + + return ret; +} + +nsresult +HTMLEditRules::CacheInlineStyles(nsIDOMNode* aNode) +{ + NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER); + + NS_ENSURE_STATE(mHTMLEditor); + bool useCSS = mHTMLEditor->IsCSSEnabled(); + + for (int32_t j = 0; j < SIZE_STYLE_TABLE; ++j) { + // If type-in state is set, don't intervene + bool typeInSet, unused; + if (NS_WARN_IF(!mHTMLEditor)) { + return NS_ERROR_UNEXPECTED; + } + mHTMLEditor->mTypeInState->GetTypingState(typeInSet, unused, + mCachedStyles[j].tag, mCachedStyles[j].attr, nullptr); + if (typeInSet) { + continue; + } + + bool isSet = false; + nsAutoString outValue; + // Don't use CSS for <font size>, we don't support it usefully (bug 780035) + if (!useCSS || (mCachedStyles[j].tag == nsGkAtoms::font && + mCachedStyles[j].attr.EqualsLiteral("size"))) { + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->IsTextPropertySetByContent(aNode, mCachedStyles[j].tag, + &(mCachedStyles[j].attr), nullptr, + isSet, &outValue); + } else { + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->mCSSEditUtils->IsCSSEquivalentToHTMLInlineStyleSet(aNode, + mCachedStyles[j].tag, &(mCachedStyles[j].attr), isSet, outValue, + CSSEditUtils::eComputed); + } + if (isSet) { + mCachedStyles[j].mPresent = true; + mCachedStyles[j].value.Assign(outValue); + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::ReapplyCachedStyles() +{ + // The idea here is to examine our cached list of styles and see if any have + // been removed. If so, add typeinstate for them, so that they will be + // reinserted when new content is added. + + // remember if we are in css mode + NS_ENSURE_STATE(mHTMLEditor); + bool useCSS = mHTMLEditor->IsCSSEnabled(); + + // get selection point; if it doesn't exist, we have nothing to do + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<Selection> selection = mHTMLEditor->GetSelection(); + if (!selection) { + // If the document is removed from its parent document during executing an + // editor operation with DOMMutationEvent or something, there may be no + // selection. + return NS_OK; + } + if (!selection->RangeCount()) { + // Nothing to do + return NS_OK; + } + nsCOMPtr<nsIContent> selNode = + do_QueryInterface(selection->GetRangeAt(0)->GetStartParent()); + if (!selNode) { + // Nothing to do + return NS_OK; + } + + for (int32_t i = 0; i < SIZE_STYLE_TABLE; ++i) { + if (mCachedStyles[i].mPresent) { + bool bFirst, bAny, bAll; + bFirst = bAny = bAll = false; + + nsAutoString curValue; + if (useCSS) { + // check computed style first in css case + NS_ENSURE_STATE(mHTMLEditor); + bAny = mHTMLEditor->mCSSEditUtils->IsCSSEquivalentToHTMLInlineStyleSet( + selNode, mCachedStyles[i].tag, &(mCachedStyles[i].attr), curValue, + CSSEditUtils::eComputed); + } + if (!bAny) { + // then check typeinstate and html style + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetInlinePropertyBase(*mCachedStyles[i].tag, + &(mCachedStyles[i].attr), + &(mCachedStyles[i].value), + &bFirst, &bAny, &bAll, + &curValue, false); + NS_ENSURE_SUCCESS(rv, rv); + } + // this style has disappeared through deletion. Add to our typeinstate: + if (!bAny || IsStyleCachePreservingAction(mTheAction)) { + NS_ENSURE_STATE(mHTMLEditor); + mHTMLEditor->mTypeInState->SetProp(mCachedStyles[i].tag, + mCachedStyles[i].attr, + mCachedStyles[i].value); + } + } + } + + return NS_OK; +} + +void +HTMLEditRules::ClearCachedStyles() +{ + // clear the mPresent bits in mCachedStyles array + for (uint32_t j = 0; j < SIZE_STYLE_TABLE; j++) { + mCachedStyles[j].mPresent = false; + mCachedStyles[j].value.Truncate(); + } +} + +void +HTMLEditRules::AdjustSpecialBreaks() +{ + NS_ENSURE_TRUE_VOID(mHTMLEditor); + + // Gather list of empty nodes + nsTArray<OwningNonNull<nsINode>> nodeArray; + EmptyEditableFunctor functor(mHTMLEditor); + DOMIterator iter; + if (NS_WARN_IF(NS_FAILED(iter.Init(*mDocChangeRange)))) { + return; + } + iter.AppendList(functor, nodeArray); + + // Put moz-br's into these empty li's and td's + for (auto& node : nodeArray) { + // Need to put br at END of node. It may have empty containers in it and + // still pass the "IsEmptyNode" test, and we want the br's to be after + // them. Also, we want the br to be after the selection if the selection + // is in this node. + nsresult rv = CreateMozBR(node->AsDOMNode(), (int32_t)node->Length()); + if (NS_WARN_IF(NS_FAILED(rv))) { + return; + } + } +} + +nsresult +HTMLEditRules::AdjustWhitespace(Selection* aSelection) +{ + // get selection point + nsCOMPtr<nsIDOMNode> selNode; + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(aSelection, + getter_AddRefs(selNode), &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // ask whitespace object to tweak nbsp's + NS_ENSURE_STATE(mHTMLEditor); + return WSRunObject(mHTMLEditor, selNode, selOffset).AdjustWhitespace(); +} + +nsresult +HTMLEditRules::PinSelectionToNewBlock(Selection* aSelection) +{ + NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER); + if (!aSelection->Collapsed()) { + return NS_OK; + } + + // get the (collapsed) selection location + nsCOMPtr<nsIDOMNode> selNode, temp; + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(aSelection, + getter_AddRefs(selNode), &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + temp = selNode; + + // use ranges and sRangeHelper to compare sel point to new block + nsCOMPtr<nsINode> node = do_QueryInterface(selNode); + NS_ENSURE_STATE(node); + RefPtr<nsRange> range = new nsRange(node); + rv = range->SetStart(selNode, selOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = range->SetEnd(selNode, selOffset); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<nsIContent> block = mNewBlock.get(); + NS_ENSURE_TRUE(block, NS_ERROR_NO_INTERFACE); + bool nodeBefore, nodeAfter; + rv = nsRange::CompareNodeToRange(block, range, &nodeBefore, &nodeAfter); + NS_ENSURE_SUCCESS(rv, rv); + + if (nodeBefore && nodeAfter) { + return NS_OK; // selection is inside block + } else if (nodeBefore) { + // selection is after block. put at end of block. + nsCOMPtr<nsIDOMNode> tmp = GetAsDOMNode(mNewBlock); + NS_ENSURE_STATE(mHTMLEditor); + tmp = GetAsDOMNode(mHTMLEditor->GetLastEditableChild(*block)); + uint32_t endPoint; + if (mHTMLEditor->IsTextNode(tmp) || + mHTMLEditor->IsContainer(tmp)) { + rv = EditorBase::GetLengthOfDOMNode(tmp, endPoint); + NS_ENSURE_SUCCESS(rv, rv); + } else { + tmp = EditorBase::GetNodeLocation(tmp, (int32_t*)&endPoint); + endPoint++; // want to be after this node + } + return aSelection->Collapse(tmp, (int32_t)endPoint); + } else { + // selection is before block. put at start of block. + nsCOMPtr<nsIDOMNode> tmp = GetAsDOMNode(mNewBlock); + NS_ENSURE_STATE(mHTMLEditor); + tmp = GetAsDOMNode(mHTMLEditor->GetFirstEditableChild(*block)); + int32_t offset; + if (mHTMLEditor->IsTextNode(tmp) || + mHTMLEditor->IsContainer(tmp)) { + tmp = EditorBase::GetNodeLocation(tmp, &offset); + } + return aSelection->Collapse(tmp, 0); + } +} + +void +HTMLEditRules::CheckInterlinePosition(Selection& aSelection) +{ + // If the selection isn't collapsed, do nothing. + if (!aSelection.Collapsed()) { + return; + } + + NS_ENSURE_TRUE_VOID(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Get the (collapsed) selection location + NS_ENSURE_TRUE_VOID(aSelection.GetRangeAt(0) && + aSelection.GetRangeAt(0)->GetStartParent()); + OwningNonNull<nsINode> selNode = *aSelection.GetRangeAt(0)->GetStartParent(); + int32_t selOffset = aSelection.GetRangeAt(0)->StartOffset(); + + // First, let's check to see if we are after a <br>. We take care of this + // special-case first so that we don't accidentally fall through into one of + // the other conditionals. + nsCOMPtr<nsIContent> node = + htmlEditor->GetPriorHTMLNode(selNode, selOffset, true); + if (node && node->IsHTMLElement(nsGkAtoms::br)) { + aSelection.SetInterlinePosition(true); + return; + } + + // Are we after a block? If so try set caret to following content + node = htmlEditor->GetPriorHTMLSibling(selNode, selOffset); + if (node && IsBlockNode(*node)) { + aSelection.SetInterlinePosition(true); + return; + } + + // Are we before a block? If so try set caret to prior content + node = htmlEditor->GetNextHTMLSibling(selNode, selOffset); + if (node && IsBlockNode(*node)) { + aSelection.SetInterlinePosition(false); + } +} + +nsresult +HTMLEditRules::AdjustSelection(Selection* aSelection, + nsIEditor::EDirection aAction) +{ + NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER); + + // if the selection isn't collapsed, do nothing. + // moose: one thing to do instead is check for the case of + // only a single break selected, and collapse it. Good thing? Beats me. + if (!aSelection->Collapsed()) { + return NS_OK; + } + + // get the (collapsed) selection location + nsCOMPtr<nsINode> selNode, temp; + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(aSelection, + getter_AddRefs(selNode), &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + temp = selNode; + + // are we in an editable node? + NS_ENSURE_STATE(mHTMLEditor); + while (!mHTMLEditor->IsEditable(selNode)) { + // scan up the tree until we find an editable place to be + selNode = EditorBase::GetNodeLocation(temp, &selOffset); + NS_ENSURE_TRUE(selNode, NS_ERROR_FAILURE); + temp = selNode; + NS_ENSURE_STATE(mHTMLEditor); + } + + // make sure we aren't in an empty block - user will see no cursor. If this + // is happening, put a <br> in the block if allowed. + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> theblock = mHTMLEditor->GetBlock(*selNode); + + if (theblock && mHTMLEditor->IsEditable(theblock)) { + bool bIsEmptyNode; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->IsEmptyNode(theblock, &bIsEmptyNode, false, false); + NS_ENSURE_SUCCESS(rv, rv); + // check if br can go into the destination node + NS_ENSURE_STATE(mHTMLEditor); + if (bIsEmptyNode && mHTMLEditor->CanContainTag(*selNode, *nsGkAtoms::br)) { + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> rootNode = mHTMLEditor->GetRoot(); + NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE); + if (selNode == rootNode) { + // Our root node is completely empty. Don't add a <br> here. + // AfterEditInner() will add one for us when it calls + // CreateBogusNodeIfNeeded()! + return NS_OK; + } + + // we know we can skip the rest of this routine given the cirumstance + return CreateMozBR(GetAsDOMNode(selNode), selOffset); + } + } + + // are we in a text node? + nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(selNode); + if (textNode) + return NS_OK; // we LIKE it when we are in a text node. that RULZ + + // do we need to insert a special mozBR? We do if we are: + // 1) prior node is in same block where selection is AND + // 2) prior node is a br AND + // 3) that br is not visible + + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIContent> nearNode = + mHTMLEditor->GetPriorHTMLNode(selNode, selOffset); + if (nearNode) { + // is nearNode also a descendant of same block? + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> block = mHTMLEditor->GetBlock(*selNode); + nsCOMPtr<Element> nearBlock = mHTMLEditor->GetBlockNodeParent(nearNode); + if (block && block == nearBlock) { + if (nearNode && TextEditUtils::IsBreak(nearNode)) { + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsVisBreak(nearNode)) { + // need to insert special moz BR. Why? Because if we don't + // the user will see no new line for the break. Also, things + // like table cells won't grow in height. + nsCOMPtr<nsIDOMNode> brNode; + rv = CreateMozBR(GetAsDOMNode(selNode), selOffset, + getter_AddRefs(brNode)); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<nsIDOMNode> brParent = + EditorBase::GetNodeLocation(brNode, &selOffset); + // selection stays *before* moz-br, sticking to it + aSelection->SetInterlinePosition(true); + rv = aSelection->Collapse(brParent, selOffset); + NS_ENSURE_SUCCESS(rv, rv); + } else { + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIContent> nextNode = + mHTMLEditor->GetNextHTMLNode(nearNode, true); + if (nextNode && TextEditUtils::IsMozBR(nextNode)) { + // selection between br and mozbr. make it stick to mozbr + // so that it will be on blank line. + aSelection->SetInterlinePosition(true); + } + } + } + } + } + + // we aren't in a textnode: are we adjacent to text or a break or an image? + NS_ENSURE_STATE(mHTMLEditor); + nearNode = mHTMLEditor->GetPriorHTMLNode(selNode, selOffset, true); + if (nearNode && (TextEditUtils::IsBreak(nearNode) || + EditorBase::IsTextNode(nearNode) || + HTMLEditUtils::IsImage(nearNode) || + nearNode->IsHTMLElement(nsGkAtoms::hr))) { + // this is a good place for the caret to be + return NS_OK; + } + NS_ENSURE_STATE(mHTMLEditor); + nearNode = mHTMLEditor->GetNextHTMLNode(selNode, selOffset, true); + if (nearNode && (TextEditUtils::IsBreak(nearNode) || + EditorBase::IsTextNode(nearNode) || + nearNode->IsAnyOfHTMLElements(nsGkAtoms::img, + nsGkAtoms::hr))) { + return NS_OK; // this is a good place for the caret to be + } + + // look for a nearby text node. + // prefer the correct direction. + nsCOMPtr<nsIDOMNode> nearNodeDOM = GetAsDOMNode(nearNode); + rv = FindNearSelectableNode(GetAsDOMNode(selNode), selOffset, aAction, + address_of(nearNodeDOM)); + NS_ENSURE_SUCCESS(rv, rv); + nearNode = do_QueryInterface(nearNodeDOM); + + if (!nearNode) { + return NS_OK; + } + EditorDOMPoint pt = GetGoodSelPointForNode(*nearNode, aAction); + rv = aSelection->Collapse(pt.node, pt.offset); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + return NS_OK; +} + + +nsresult +HTMLEditRules::FindNearSelectableNode(nsIDOMNode* aSelNode, + int32_t aSelOffset, + nsIEditor::EDirection& aDirection, + nsCOMPtr<nsIDOMNode>* outSelectableNode) +{ + NS_ENSURE_TRUE(aSelNode && outSelectableNode, NS_ERROR_NULL_POINTER); + *outSelectableNode = nullptr; + + nsCOMPtr<nsIDOMNode> nearNode, curNode; + if (aDirection == nsIEditor::ePrevious) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetPriorHTMLNode(aSelNode, aSelOffset, address_of(nearNode)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetNextHTMLNode(aSelNode, aSelOffset, address_of(nearNode)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + + // Try the other direction then. + if (!nearNode) { + if (aDirection == nsIEditor::ePrevious) { + aDirection = nsIEditor::eNext; + } else { + aDirection = nsIEditor::ePrevious; + } + + if (aDirection == nsIEditor::ePrevious) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->GetPriorHTMLNode(aSelNode, aSelOffset, + address_of(nearNode)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->GetNextHTMLNode(aSelNode, aSelOffset, + address_of(nearNode)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } + + // scan in the right direction until we find an eligible text node, + // but don't cross any breaks, images, or table elements. + NS_ENSURE_STATE(mHTMLEditor); + while (nearNode && !(mHTMLEditor->IsTextNode(nearNode) || + TextEditUtils::IsBreak(nearNode) || + HTMLEditUtils::IsImage(nearNode))) { + curNode = nearNode; + if (aDirection == nsIEditor::ePrevious) { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetPriorHTMLNode(curNode, address_of(nearNode)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->GetNextHTMLNode(curNode, address_of(nearNode)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + NS_ENSURE_STATE(mHTMLEditor); + } + + if (nearNode) { + // don't cross any table elements + if (InDifferentTableElements(nearNode, aSelNode)) { + return NS_OK; + } + + // otherwise, ok, we have found a good spot to put the selection + *outSelectableNode = do_QueryInterface(nearNode); + } + return NS_OK; +} + +bool +HTMLEditRules::InDifferentTableElements(nsIDOMNode* aNode1, + nsIDOMNode* aNode2) +{ + nsCOMPtr<nsINode> node1 = do_QueryInterface(aNode1); + nsCOMPtr<nsINode> node2 = do_QueryInterface(aNode2); + return InDifferentTableElements(node1, node2); +} + +bool +HTMLEditRules::InDifferentTableElements(nsINode* aNode1, + nsINode* aNode2) +{ + MOZ_ASSERT(aNode1 && aNode2); + + while (aNode1 && !HTMLEditUtils::IsTableElement(aNode1)) { + aNode1 = aNode1->GetParentNode(); + } + + while (aNode2 && !HTMLEditUtils::IsTableElement(aNode2)) { + aNode2 = aNode2->GetParentNode(); + } + + return aNode1 != aNode2; +} + + +nsresult +HTMLEditRules::RemoveEmptyNodes() +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + // Some general notes on the algorithm used here: the goal is to examine all + // the nodes in mDocChangeRange, and remove the empty ones. We do this by + // using a content iterator to traverse all the nodes in the range, and + // placing the empty nodes into an array. After finishing the iteration, we + // delete the empty nodes in the array. (They cannot be deleted as we find + // them because that would invalidate the iterator.) + // + // Since checking to see if a node is empty can be costly for nodes with many + // descendants, there are some optimizations made. I rely on the fact that + // the iterator is post-order: it will visit children of a node before + // visiting the parent node. So if I find that a child node is not empty, I + // know that its parent is not empty without even checking. So I put the + // parent on a "skipList" which is just a voidArray of nodes I can skip the + // empty check on. If I encounter a node on the skiplist, i skip the + // processing for that node and replace its slot in the skiplist with that + // node's parent. + // + // An interesting idea is to go ahead and regard parent nodes that are NOT on + // the skiplist as being empty (without even doing the IsEmptyNode check) on + // the theory that if they weren't empty, we would have encountered a + // non-empty child earlier and thus put this parent node on the skiplist. + // + // Unfortunately I can't use that strategy here, because the range may + // include some children of a node while excluding others. Thus I could find + // all the _examined_ children empty, but still not have an empty parent. + + // need an iterator + nsCOMPtr<nsIContentIterator> iter = NS_NewContentIterator(); + + nsresult rv = iter->Init(mDocChangeRange); + NS_ENSURE_SUCCESS(rv, rv); + + nsTArray<OwningNonNull<nsINode>> arrayOfEmptyNodes, arrayOfEmptyCites, skipList; + + // Check for empty nodes + while (!iter->IsDone()) { + OwningNonNull<nsINode> node = *iter->GetCurrentNode(); + + nsCOMPtr<nsINode> parent = node->GetParentNode(); + + size_t idx = skipList.IndexOf(node); + if (idx != skipList.NoIndex) { + // This node is on our skip list. Skip processing for this node, and + // replace its value in the skip list with the value of its parent + if (parent) { + skipList[idx] = parent; + } + } else { + bool bIsCandidate = false; + bool bIsEmptyNode = false; + bool bIsMailCite = false; + + if (node->IsElement()) { + if (node->IsHTMLElement(nsGkAtoms::body)) { + // Don't delete the body + } else if ((bIsMailCite = HTMLEditUtils::IsMailCite(node)) || + node->IsHTMLElement(nsGkAtoms::a) || + HTMLEditUtils::IsInlineStyle(node) || + HTMLEditUtils::IsList(node) || + node->IsHTMLElement(nsGkAtoms::div)) { + // Only consider certain nodes to be empty for purposes of removal + bIsCandidate = true; + } else if (HTMLEditUtils::IsFormatNode(node) || + HTMLEditUtils::IsListItem(node) || + node->IsHTMLElement(nsGkAtoms::blockquote)) { + // These node types are candidates if selection is not in them. If + // it is one of these, don't delete if selection inside. This is so + // we can create empty headings, etc., for the user to type into. + bool bIsSelInNode; + rv = SelectionEndpointInNode(node, &bIsSelInNode); + NS_ENSURE_SUCCESS(rv, rv); + if (!bIsSelInNode) { + bIsCandidate = true; + } + } + } + + if (bIsCandidate) { + // We delete mailcites even if they have a solo br in them. Other + // nodes we require to be empty. + rv = htmlEditor->IsEmptyNode(node->AsDOMNode(), &bIsEmptyNode, + bIsMailCite, true); + NS_ENSURE_SUCCESS(rv, rv); + if (bIsEmptyNode) { + if (bIsMailCite) { + // mailcites go on a separate list from other empty nodes + arrayOfEmptyCites.AppendElement(*node); + } else { + arrayOfEmptyNodes.AppendElement(*node); + } + } + } + + if (!bIsEmptyNode && parent) { + // put parent on skip list + skipList.AppendElement(*parent); + } + } + + iter->Next(); + } + + // now delete the empty nodes + for (auto& delNode : arrayOfEmptyNodes) { + if (htmlEditor->IsModifiableNode(delNode)) { + rv = htmlEditor->DeleteNode(delNode); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + // Now delete the empty mailcites. This is a separate step because we want + // to pull out any br's and preserve them. + for (auto& delNode : arrayOfEmptyCites) { + bool bIsEmptyNode; + rv = htmlEditor->IsEmptyNode(delNode, &bIsEmptyNode, false, true); + NS_ENSURE_SUCCESS(rv, rv); + if (!bIsEmptyNode) { + // We are deleting a cite that has just a br. We want to delete cite, + // but preserve br. + nsCOMPtr<nsINode> parent = delNode->GetParentNode(); + int32_t offset = parent ? parent->IndexOf(delNode) : -1; + nsCOMPtr<Element> br = htmlEditor->CreateBR(parent, offset); + NS_ENSURE_STATE(br); + } + rv = htmlEditor->DeleteNode(delNode); + NS_ENSURE_SUCCESS(rv, rv); + } + + return NS_OK; +} + +nsresult +HTMLEditRules::SelectionEndpointInNode(nsINode* aNode, + bool* aResult) +{ + NS_ENSURE_TRUE(aNode && aResult, NS_ERROR_NULL_POINTER); + + nsIDOMNode* node = aNode->AsDOMNode(); + + *aResult = false; + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<Selection> selection = mHTMLEditor->GetSelection(); + NS_ENSURE_STATE(selection); + + uint32_t rangeCount = selection->RangeCount(); + for (uint32_t rangeIdx = 0; rangeIdx < rangeCount; ++rangeIdx) { + RefPtr<nsRange> range = selection->GetRangeAt(rangeIdx); + nsCOMPtr<nsIDOMNode> startParent, endParent; + range->GetStartContainer(getter_AddRefs(startParent)); + if (startParent) { + if (node == startParent) { + *aResult = true; + return NS_OK; + } + if (EditorUtils::IsDescendantOf(startParent, node)) { + *aResult = true; + return NS_OK; + } + } + range->GetEndContainer(getter_AddRefs(endParent)); + if (startParent == endParent) { + continue; + } + if (endParent) { + if (node == endParent) { + *aResult = true; + return NS_OK; + } + if (EditorUtils::IsDescendantOf(endParent, node)) { + *aResult = true; + return NS_OK; + } + } + } + return NS_OK; +} + +/** + * IsEmptyInline: Return true if aNode is an empty inline container + */ +bool +HTMLEditRules::IsEmptyInline(nsINode& aNode) +{ + NS_ENSURE_TRUE(mHTMLEditor, false); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + if (IsInlineNode(aNode) && htmlEditor->IsContainer(&aNode)) { + bool isEmpty = true; + htmlEditor->IsEmptyNode(&aNode, &isEmpty); + return isEmpty; + } + return false; +} + + +bool +HTMLEditRules::ListIsEmptyLine(nsTArray<OwningNonNull<nsINode>>& aArrayOfNodes) +{ + // We have a list of nodes which we are candidates for being moved into a new + // block. Determine if it's anything more than a blank line. Look for + // editable content above and beyond one single BR. + NS_ENSURE_TRUE(aArrayOfNodes.Length(), true); + + NS_ENSURE_TRUE(mHTMLEditor, false); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + int32_t brCount = 0; + + for (auto& node : aArrayOfNodes) { + if (!htmlEditor->IsEditable(node)) { + continue; + } + if (TextEditUtils::IsBreak(node)) { + // First break doesn't count + if (brCount) { + return false; + } + brCount++; + } else if (IsEmptyInline(node)) { + // Empty inline, keep looking + } else { + return false; + } + } + return true; +} + + +nsresult +HTMLEditRules::PopListItem(nsIDOMNode* aListItem, + bool* aOutOfList) +{ + nsCOMPtr<Element> listItem = do_QueryInterface(aListItem); + // check parms + NS_ENSURE_TRUE(listItem && aOutOfList, NS_ERROR_NULL_POINTER); + + // init out params + *aOutOfList = false; + + nsCOMPtr<nsINode> curParent = listItem->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(listItem) : -1; + + if (!HTMLEditUtils::IsListItem(listItem)) { + return NS_ERROR_FAILURE; + } + + // if it's first or last list item, don't need to split the list + // otherwise we do. + nsCOMPtr<nsINode> curParPar = curParent->GetParentNode(); + int32_t parOffset = curParPar ? curParPar->IndexOf(curParent) : -1; + + bool bIsFirstListItem; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->IsFirstEditableChild(aListItem, &bIsFirstListItem); + NS_ENSURE_SUCCESS(rv, rv); + + bool bIsLastListItem; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->IsLastEditableChild(aListItem, &bIsLastListItem); + NS_ENSURE_SUCCESS(rv, rv); + + if (!bIsFirstListItem && !bIsLastListItem) { + // split the list + nsCOMPtr<nsIDOMNode> newBlock; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->SplitNode(GetAsDOMNode(curParent), offset, + getter_AddRefs(newBlock)); + NS_ENSURE_SUCCESS(rv, rv); + } + + if (!bIsFirstListItem) { + parOffset++; + } + + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->MoveNode(listItem, curParPar, parOffset); + NS_ENSURE_SUCCESS(rv, rv); + + // unwrap list item contents if they are no longer in a list + if (!HTMLEditUtils::IsList(curParPar) && + HTMLEditUtils::IsListItem(listItem)) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->RemoveBlockContainer(*listItem); + NS_ENSURE_SUCCESS(rv, rv); + *aOutOfList = true; + } + return NS_OK; +} + +nsresult +HTMLEditRules::RemoveListStructure(Element& aList) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + while (aList.GetFirstChild()) { + OwningNonNull<nsIContent> child = *aList.GetFirstChild(); + + if (HTMLEditUtils::IsListItem(child)) { + bool isOutOfList; + // Keep popping it out until it's not in a list anymore + do { + nsresult rv = PopListItem(child->AsDOMNode(), &isOutOfList); + NS_ENSURE_SUCCESS(rv, rv); + } while (!isOutOfList); + } else if (HTMLEditUtils::IsList(child)) { + nsresult rv = RemoveListStructure(*child->AsElement()); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Delete any non-list items for now + nsresult rv = htmlEditor->DeleteNode(child); + NS_ENSURE_SUCCESS(rv, rv); + } + } + + // Delete the now-empty list + nsresult rv = htmlEditor->RemoveBlockContainer(aList); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +nsresult +HTMLEditRules::ConfirmSelectionInBody() +{ + // get the body + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIDOMElement> rootElement = do_QueryInterface(mHTMLEditor->GetRoot()); + NS_ENSURE_TRUE(rootElement, NS_ERROR_UNEXPECTED); + + // get the selection + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<Selection> selection = mHTMLEditor->GetSelection(); + NS_ENSURE_STATE(selection); + + // get the selection start location + nsCOMPtr<nsIDOMNode> selNode, temp, parent; + int32_t selOffset; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(selection, + getter_AddRefs(selNode), &selOffset); + if (NS_FAILED(rv)) { + return rv; + } + + temp = selNode; + + // check that selNode is inside body + while (temp && !TextEditUtils::IsBody(temp)) { + temp->GetParentNode(getter_AddRefs(parent)); + temp = parent; + } + + // if we aren't in the body, force the issue + if (!temp) { +// uncomment this to see when we get bad selections +// NS_NOTREACHED("selection not in body"); + selection->Collapse(rootElement, 0); + } + + // get the selection end location + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetEndNodeAndOffset(selection, + getter_AddRefs(selNode), &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + temp = selNode; + + // check that selNode is inside body + while (temp && !TextEditUtils::IsBody(temp)) { + rv = temp->GetParentNode(getter_AddRefs(parent)); + temp = parent; + } + + // if we aren't in the body, force the issue + if (!temp) { +// uncomment this to see when we get bad selections +// NS_NOTREACHED("selection not in body"); + selection->Collapse(rootElement, 0); + } + + // XXX This is the result of the last call of GetParentNode(), it doesn't + // make sense... + return rv; +} + +nsresult +HTMLEditRules::UpdateDocChangeRange(nsRange* aRange) +{ + // first make sure aRange is in the document. It might not be if + // portions of our editting action involved manipulating nodes + // prior to placing them in the document (e.g., populating a list item + // before placing it in its list) + nsCOMPtr<nsIDOMNode> startNode; + nsresult rv = aRange->GetStartContainer(getter_AddRefs(startNode)); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + if (!mHTMLEditor->IsDescendantOfRoot(startNode)) { + // just return - we don't need to adjust mDocChangeRange in this case + return NS_OK; + } + + if (!mDocChangeRange) { + // clone aRange. + mDocChangeRange = aRange->CloneRange(); + } else { + int16_t result; + + // compare starts of ranges + rv = mDocChangeRange->CompareBoundaryPoints(nsIDOMRange::START_TO_START, + aRange, &result); + if (rv == NS_ERROR_NOT_INITIALIZED) { + // This will happen is mDocChangeRange is non-null, but the range is + // uninitialized. In this case we'll set the start to aRange start. + // The same test won't be needed further down since after we've set + // the start the range will be collapsed to that point. + result = 1; + rv = NS_OK; + } + NS_ENSURE_SUCCESS(rv, rv); + // Positive result means mDocChangeRange start is after aRange start. + if (result > 0) { + int32_t startOffset; + rv = aRange->GetStartOffset(&startOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mDocChangeRange->SetStart(startNode, startOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + + // compare ends of ranges + rv = mDocChangeRange->CompareBoundaryPoints(nsIDOMRange::END_TO_END, + aRange, &result); + NS_ENSURE_SUCCESS(rv, rv); + // Negative result means mDocChangeRange end is before aRange end. + if (result < 0) { + nsCOMPtr<nsIDOMNode> endNode; + int32_t endOffset; + rv = aRange->GetEndContainer(getter_AddRefs(endNode)); + NS_ENSURE_SUCCESS(rv, rv); + rv = aRange->GetEndOffset(&endOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mDocChangeRange->SetEnd(endNode, endOffset); + NS_ENSURE_SUCCESS(rv, rv); + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::InsertMozBRIfNeeded(nsINode& aNode) +{ + if (!IsBlockNode(aNode)) { + return NS_OK; + } + + bool isEmpty; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->IsEmptyNode(&aNode, &isEmpty); + NS_ENSURE_SUCCESS(rv, rv); + if (!isEmpty) { + return NS_OK; + } + + return CreateMozBR(aNode.AsDOMNode(), 0); +} + +NS_IMETHODIMP +HTMLEditRules::WillCreateNode(const nsAString& aTag, + nsIDOMNode* aParent, + int32_t aPosition) +{ + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::DidCreateNode(const nsAString& aTag, + nsIDOMNode* aNode, + nsIDOMNode* aParent, + int32_t aPosition, + nsresult aResult) +{ + if (!mListenerEnabled) { + return NS_OK; + } + // assumption that Join keeps the righthand node + nsresult rv = mUtilRange->SelectNode(aNode); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::WillInsertNode(nsIDOMNode* aNode, + nsIDOMNode* aParent, + int32_t aPosition) +{ + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::DidInsertNode(nsIDOMNode* aNode, + nsIDOMNode* aParent, + int32_t aPosition, + nsresult aResult) +{ + if (!mListenerEnabled) { + return NS_OK; + } + nsresult rv = mUtilRange->SelectNode(aNode); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::WillDeleteNode(nsIDOMNode* aChild) +{ + if (!mListenerEnabled) { + return NS_OK; + } + nsresult rv = mUtilRange->SelectNode(aChild); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::DidDeleteNode(nsIDOMNode* aChild, + nsresult aResult) +{ + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::WillSplitNode(nsIDOMNode* aExistingRightNode, + int32_t aOffset) +{ + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::DidSplitNode(nsIDOMNode* aExistingRightNode, + int32_t aOffset, + nsIDOMNode* aNewLeftNode, + nsresult aResult) +{ + if (!mListenerEnabled) { + return NS_OK; + } + nsresult rv = mUtilRange->SetStart(aNewLeftNode, 0); + NS_ENSURE_SUCCESS(rv, rv); + rv = mUtilRange->SetEnd(aExistingRightNode, 0); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::WillJoinNodes(nsIDOMNode* aLeftNode, + nsIDOMNode* aRightNode, + nsIDOMNode* aParent) +{ + if (!mListenerEnabled) { + return NS_OK; + } + // remember split point + return EditorBase::GetLengthOfDOMNode(aLeftNode, mJoinOffset); +} + +NS_IMETHODIMP +HTMLEditRules::DidJoinNodes(nsIDOMNode* aLeftNode, + nsIDOMNode* aRightNode, + nsIDOMNode* aParent, + nsresult aResult) +{ + if (!mListenerEnabled) { + return NS_OK; + } + // assumption that Join keeps the righthand node + nsresult rv = mUtilRange->SetStart(aRightNode, mJoinOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mUtilRange->SetEnd(aRightNode, mJoinOffset); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::WillInsertText(nsIDOMCharacterData* aTextNode, + int32_t aOffset, + const nsAString& aString) +{ + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::DidInsertText(nsIDOMCharacterData* aTextNode, + int32_t aOffset, + const nsAString& aString, + nsresult aResult) +{ + if (!mListenerEnabled) { + return NS_OK; + } + int32_t length = aString.Length(); + nsCOMPtr<nsIDOMNode> theNode = do_QueryInterface(aTextNode); + nsresult rv = mUtilRange->SetStart(theNode, aOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mUtilRange->SetEnd(theNode, aOffset+length); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::WillDeleteText(nsIDOMCharacterData* aTextNode, + int32_t aOffset, + int32_t aLength) +{ + return NS_OK; +} + +NS_IMETHODIMP +HTMLEditRules::DidDeleteText(nsIDOMCharacterData* aTextNode, + int32_t aOffset, + int32_t aLength, + nsresult aResult) +{ + if (!mListenerEnabled) { + return NS_OK; + } + nsCOMPtr<nsIDOMNode> theNode = do_QueryInterface(aTextNode); + nsresult rv = mUtilRange->SetStart(theNode, aOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mUtilRange->SetEnd(theNode, aOffset); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::WillDeleteSelection(nsISelection* aSelection) +{ + if (!mListenerEnabled) { + return NS_OK; + } + if (NS_WARN_IF(!aSelection)) { + return NS_ERROR_INVALID_ARG; + } + RefPtr<Selection> selection = aSelection->AsSelection(); + // get the (collapsed) selection location + nsCOMPtr<nsIDOMNode> selNode; + int32_t selOffset; + + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetStartNodeAndOffset(selection, + getter_AddRefs(selNode), &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mUtilRange->SetStart(selNode, selOffset); + NS_ENSURE_SUCCESS(rv, rv); + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetEndNodeAndOffset(selection, + getter_AddRefs(selNode), &selOffset); + NS_ENSURE_SUCCESS(rv, rv); + rv = mUtilRange->SetEnd(selNode, selOffset); + NS_ENSURE_SUCCESS(rv, rv); + return UpdateDocChangeRange(mUtilRange); +} + +NS_IMETHODIMP +HTMLEditRules::DidDeleteSelection(nsISelection *aSelection) +{ + return NS_OK; +} + +// Let's remove all alignment hints in the children of aNode; it can +// be an ALIGN attribute (in case we just remove it) or a CENTER +// element (here we have to remove the container and keep its +// children). We break on tables and don't look at their children. +nsresult +HTMLEditRules::RemoveAlignment(nsIDOMNode* aNode, + const nsAString& aAlignType, + bool aChildrenOnly) +{ + NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER); + + NS_ENSURE_STATE(mHTMLEditor); + if (mHTMLEditor->IsTextNode(aNode) || HTMLEditUtils::IsTable(aNode)) { + return NS_OK; + } + + nsCOMPtr<nsIDOMNode> child = aNode,tmp; + if (aChildrenOnly) { + aNode->GetFirstChild(getter_AddRefs(child)); + } + NS_ENSURE_STATE(mHTMLEditor); + bool useCSS = mHTMLEditor->IsCSSEnabled(); + + while (child) { + if (aChildrenOnly) { + // get the next sibling right now because we could have to remove child + child->GetNextSibling(getter_AddRefs(tmp)); + } else { + tmp = nullptr; + } + bool isBlock; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->NodeIsBlockStatic(child, &isBlock); + NS_ENSURE_SUCCESS(rv, rv); + + if (EditorBase::NodeIsType(child, nsGkAtoms::center)) { + // the current node is a CENTER element + // first remove children's alignment + rv = RemoveAlignment(child, aAlignType, true); + NS_ENSURE_SUCCESS(rv, rv); + + // we may have to insert BRs in first and last position of element's children + // if the nodes before/after are not blocks and not BRs + rv = MakeSureElemStartsOrEndsOnCR(child); + NS_ENSURE_SUCCESS(rv, rv); + + // now remove the CENTER container + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<Element> childAsElement = do_QueryInterface(child); + NS_ENSURE_STATE(childAsElement); + rv = mHTMLEditor->RemoveContainer(childAsElement); + NS_ENSURE_SUCCESS(rv, rv); + } else if (isBlock || HTMLEditUtils::IsHR(child)) { + // the current node is a block element + nsCOMPtr<nsIDOMElement> curElem = do_QueryInterface(child); + if (HTMLEditUtils::SupportsAlignAttr(child)) { + // remove the ALIGN attribute if this element can have it + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->RemoveAttribute(curElem, NS_LITERAL_STRING("align")); + NS_ENSURE_SUCCESS(rv, rv); + } + if (useCSS) { + if (HTMLEditUtils::IsTable(child) || HTMLEditUtils::IsHR(child)) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->SetAttributeOrEquivalent(curElem, + NS_LITERAL_STRING("align"), + aAlignType, false); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + nsAutoString dummyCssValue; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->mCSSEditUtils->RemoveCSSInlineStyle( + child, + nsGkAtoms::textAlign, + dummyCssValue); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + } + if (!HTMLEditUtils::IsTable(child)) { + // unless this is a table, look at children + rv = RemoveAlignment(child, aAlignType, true); + NS_ENSURE_SUCCESS(rv, rv); + } + } + child = tmp; + } + return NS_OK; +} + +// Let's insert a BR as first (resp. last) child of aNode if its +// first (resp. last) child is not a block nor a BR, and if the +// previous (resp. next) sibling is not a block nor a BR +nsresult +HTMLEditRules::MakeSureElemStartsOrEndsOnCR(nsIDOMNode* aNode, + bool aStarts) +{ + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER); + + nsCOMPtr<nsIDOMNode> child; + if (aStarts) { + NS_ENSURE_STATE(mHTMLEditor); + child = GetAsDOMNode(mHTMLEditor->GetFirstEditableChild(*node)); + } else { + NS_ENSURE_STATE(mHTMLEditor); + child = GetAsDOMNode(mHTMLEditor->GetLastEditableChild(*node)); + } + NS_ENSURE_TRUE(child, NS_OK); + bool isChildBlock; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = mHTMLEditor->NodeIsBlockStatic(child, &isChildBlock); + NS_ENSURE_SUCCESS(rv, rv); + bool foundCR = false; + if (isChildBlock || TextEditUtils::IsBreak(child)) { + foundCR = true; + } else { + nsCOMPtr<nsIDOMNode> sibling; + if (aStarts) { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetPriorHTMLSibling(aNode, address_of(sibling)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } else { + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->GetNextHTMLSibling(aNode, address_of(sibling)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + } + if (sibling) { + bool isBlock; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->NodeIsBlockStatic(sibling, &isBlock); + NS_ENSURE_SUCCESS(rv, rv); + if (isBlock || TextEditUtils::IsBreak(sibling)) { + foundCR = true; + } + } else { + foundCR = true; + } + } + if (!foundCR) { + int32_t offset = 0; + if (!aStarts) { + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + NS_ENSURE_STATE(node); + offset = node->GetChildCount(); + } + nsCOMPtr<nsIDOMNode> brNode; + NS_ENSURE_STATE(mHTMLEditor); + rv = mHTMLEditor->CreateBR(aNode, offset, address_of(brNode)); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +nsresult +HTMLEditRules::MakeSureElemStartsOrEndsOnCR(nsIDOMNode* aNode) +{ + nsresult rv = MakeSureElemStartsOrEndsOnCR(aNode, false); + NS_ENSURE_SUCCESS(rv, rv); + return MakeSureElemStartsOrEndsOnCR(aNode, true); +} + +nsresult +HTMLEditRules::AlignBlock(Element& aElement, + const nsAString& aAlignType, + ContentsOnly aContentsOnly) +{ + if (!IsBlockNode(aElement) && !aElement.IsHTMLElement(nsGkAtoms::hr)) { + // We deal only with blocks; early way out + return NS_OK; + } + + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + nsresult rv = RemoveAlignment(aElement.AsDOMNode(), aAlignType, + aContentsOnly == ContentsOnly::yes); + NS_ENSURE_SUCCESS(rv, rv); + NS_NAMED_LITERAL_STRING(attr, "align"); + if (htmlEditor->IsCSSEnabled()) { + // Let's use CSS alignment; we use margin-left and margin-right for tables + // and text-align for other block-level elements + rv = htmlEditor->SetAttributeOrEquivalent( + static_cast<nsIDOMElement*>(aElement.AsDOMNode()), + attr, aAlignType, false); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // HTML case; this code is supposed to be called ONLY if the element + // supports the align attribute but we'll never know... + if (HTMLEditUtils::SupportsAlignAttr(aElement.AsDOMNode())) { + rv = htmlEditor->SetAttribute( + static_cast<nsIDOMElement*>(aElement.AsDOMNode()), + attr, aAlignType); + NS_ENSURE_SUCCESS(rv, rv); + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::ChangeIndentation(Element& aElement, + Change aChange) +{ + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + nsIAtom& marginProperty = + MarginPropertyAtomForIndent(*htmlEditor->mCSSEditUtils, aElement); + nsAutoString value; + htmlEditor->mCSSEditUtils->GetSpecifiedProperty(aElement, marginProperty, + value); + float f; + nsCOMPtr<nsIAtom> unit; + htmlEditor->mCSSEditUtils->ParseLength(value, &f, getter_AddRefs(unit)); + if (!f) { + nsAutoString defaultLengthUnit; + htmlEditor->mCSSEditUtils->GetDefaultLengthUnit(defaultLengthUnit); + unit = NS_Atomize(defaultLengthUnit); + } + int8_t multiplier = aChange == Change::plus ? +1 : -1; + if (nsGkAtoms::in == unit) { + f += NS_EDITOR_INDENT_INCREMENT_IN * multiplier; + } else if (nsGkAtoms::cm == unit) { + f += NS_EDITOR_INDENT_INCREMENT_CM * multiplier; + } else if (nsGkAtoms::mm == unit) { + f += NS_EDITOR_INDENT_INCREMENT_MM * multiplier; + } else if (nsGkAtoms::pt == unit) { + f += NS_EDITOR_INDENT_INCREMENT_PT * multiplier; + } else if (nsGkAtoms::pc == unit) { + f += NS_EDITOR_INDENT_INCREMENT_PC * multiplier; + } else if (nsGkAtoms::em == unit) { + f += NS_EDITOR_INDENT_INCREMENT_EM * multiplier; + } else if (nsGkAtoms::ex == unit) { + f += NS_EDITOR_INDENT_INCREMENT_EX * multiplier; + } else if (nsGkAtoms::px == unit) { + f += NS_EDITOR_INDENT_INCREMENT_PX * multiplier; + } else if (nsGkAtoms::percentage == unit) { + f += NS_EDITOR_INDENT_INCREMENT_PERCENT * multiplier; + } + + if (0 < f) { + nsAutoString newValue; + newValue.AppendFloat(f); + newValue.Append(nsDependentAtomString(unit)); + htmlEditor->mCSSEditUtils->SetCSSProperty(aElement, marginProperty, + newValue); + return NS_OK; + } + + htmlEditor->mCSSEditUtils->RemoveCSSProperty(aElement, marginProperty, + value); + + // Remove unnecessary divs + if (!aElement.IsHTMLElement(nsGkAtoms::div) || + &aElement == htmlEditor->GetActiveEditingHost() || + !htmlEditor->IsDescendantOfEditorRoot(&aElement) || + HTMLEditor::HasAttributes(&aElement)) { + return NS_OK; + } + + nsresult rv = htmlEditor->RemoveContainer(&aElement); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +nsresult +HTMLEditRules::WillAbsolutePosition(Selection& aSelection, + bool* aCancel, + bool* aHandled) +{ + MOZ_ASSERT(aCancel && aHandled); + NS_ENSURE_STATE(mHTMLEditor); + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + + WillInsert(aSelection, aCancel); + + // We want to ignore result of WillInsert() + *aCancel = false; + *aHandled = true; + + nsCOMPtr<Element> focusElement = htmlEditor->GetSelectionContainer(); + if (focusElement && HTMLEditUtils::IsImage(focusElement)) { + mNewBlock = focusElement; + return NS_OK; + } + + nsresult rv = NormalizeSelection(&aSelection); + NS_ENSURE_SUCCESS(rv, rv); + AutoSelectionRestorer selectionRestorer(&aSelection, htmlEditor); + + // Convert the selection ranges into "promoted" selection ranges: this + // basically just expands the range to include the immediate block parent, + // and then further expands to include any ancestors whose children are all + // in the range. + + nsTArray<RefPtr<nsRange>> arrayOfRanges; + GetPromotedRanges(aSelection, arrayOfRanges, + EditAction::setAbsolutePosition); + + // Use these ranges to contruct a list of nodes to act on. + nsTArray<OwningNonNull<nsINode>> arrayOfNodes; + rv = GetNodesForOperation(arrayOfRanges, arrayOfNodes, + EditAction::setAbsolutePosition); + NS_ENSURE_SUCCESS(rv, rv); + + // If nothing visible in list, make an empty block + if (ListIsEmptyLine(arrayOfNodes)) { + // Get selection location + NS_ENSURE_STATE(aSelection.GetRangeAt(0) && + aSelection.GetRangeAt(0)->GetStartParent()); + OwningNonNull<nsINode> parent = + *aSelection.GetRangeAt(0)->GetStartParent(); + int32_t offset = aSelection.GetRangeAt(0)->StartOffset(); + + // Make sure we can put a block here + rv = SplitAsNeeded(*nsGkAtoms::div, parent, offset); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<Element> positionedDiv = + htmlEditor->CreateNode(nsGkAtoms::div, parent, offset); + NS_ENSURE_STATE(positionedDiv); + // Remember our new block for postprocessing + mNewBlock = positionedDiv; + // Delete anything that was in the list of nodes + while (!arrayOfNodes.IsEmpty()) { + OwningNonNull<nsINode> curNode = arrayOfNodes[0]; + rv = htmlEditor->DeleteNode(curNode); + NS_ENSURE_SUCCESS(rv, rv); + arrayOfNodes.RemoveElementAt(0); + } + // Put selection in new block + *aHandled = true; + rv = aSelection.Collapse(positionedDiv, 0); + // Don't restore the selection + selectionRestorer.Abort(); + NS_ENSURE_SUCCESS(rv, rv); + return NS_OK; + } + + // Okay, now go through all the nodes and put them in a blockquote, or + // whatever is appropriate. Woohoo! + nsCOMPtr<Element> curList, curPositionedDiv, indentedLI; + for (uint32_t i = 0; i < arrayOfNodes.Length(); i++) { + // Here's where we actually figure out what to do + NS_ENSURE_STATE(arrayOfNodes[i]->IsContent()); + OwningNonNull<nsIContent> curNode = *arrayOfNodes[i]->AsContent(); + + // Ignore all non-editable nodes. Leave them be. + if (!htmlEditor->IsEditable(curNode)) { + continue; + } + + nsCOMPtr<nsIContent> sibling; + + nsCOMPtr<nsINode> curParent = curNode->GetParentNode(); + int32_t offset = curParent ? curParent->IndexOf(curNode) : -1; + + // Some logic for putting list items into nested lists... + if (HTMLEditUtils::IsList(curParent)) { + // Check to see if curList is still appropriate. Which it is if curNode + // is still right after it in the same list. + if (curList) { + sibling = htmlEditor->GetPriorHTMLSibling(curNode); + } + + if (!curList || (sibling && sibling != curList)) { + // Create a new nested list of correct type + rv = + SplitAsNeeded(*curParent->NodeInfo()->NameAtom(), curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + if (!curPositionedDiv) { + nsCOMPtr<nsINode> curParentParent = curParent->GetParentNode(); + int32_t parentOffset = curParentParent + ? curParentParent->IndexOf(curParent) : -1; + curPositionedDiv = htmlEditor->CreateNode(nsGkAtoms::div, curParentParent, + parentOffset); + mNewBlock = curPositionedDiv; + } + curList = htmlEditor->CreateNode(curParent->NodeInfo()->NameAtom(), + curPositionedDiv, -1); + NS_ENSURE_STATE(curList); + // curList is now the correct thing to put curNode in. Remember our + // new block for postprocessing. + } + // Tuck the node into the end of the active list + rv = htmlEditor->MoveNode(curNode, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + } else { + // Not a list item, use blockquote? If we are inside a list item, we + // don't want to blockquote, we want to sublist the list item. We may + // have several nodes listed in the array of nodes to act on, that are in + // the same list item. Since we only want to indent that li once, we + // must keep track of the most recent indented list item, and not indent + // it if we find another node to act on that is still inside the same li. + nsCOMPtr<Element> listItem = IsInListItem(curNode); + if (listItem) { + if (indentedLI == listItem) { + // Already indented this list item + continue; + } + curParent = listItem->GetParentNode(); + offset = curParent ? curParent->IndexOf(listItem) : -1; + // Check to see if curList is still appropriate. Which it is if + // curNode is still right after it in the same list. + if (curList) { + sibling = htmlEditor->GetPriorHTMLSibling(curNode); + } + + if (!curList || (sibling && sibling != curList)) { + // Create a new nested list of correct type + rv = SplitAsNeeded(*curParent->NodeInfo()->NameAtom(), curParent, + offset); + NS_ENSURE_SUCCESS(rv, rv); + if (!curPositionedDiv) { + nsCOMPtr<nsINode> curParentParent = curParent->GetParentNode(); + int32_t parentOffset = curParentParent ? + curParentParent->IndexOf(curParent) : -1; + curPositionedDiv = htmlEditor->CreateNode(nsGkAtoms::div, + curParentParent, + parentOffset); + mNewBlock = curPositionedDiv; + } + curList = htmlEditor->CreateNode(curParent->NodeInfo()->NameAtom(), + curPositionedDiv, -1); + NS_ENSURE_STATE(curList); + } + rv = htmlEditor->MoveNode(listItem, curList, -1); + NS_ENSURE_SUCCESS(rv, rv); + // Remember we indented this li + indentedLI = listItem; + } else { + // Need to make a div to put things in if we haven't already + + if (!curPositionedDiv) { + if (curNode->IsHTMLElement(nsGkAtoms::div)) { + curPositionedDiv = curNode->AsElement(); + mNewBlock = curPositionedDiv; + curList = nullptr; + continue; + } + rv = SplitAsNeeded(*nsGkAtoms::div, curParent, offset); + NS_ENSURE_SUCCESS(rv, rv); + curPositionedDiv = htmlEditor->CreateNode(nsGkAtoms::div, curParent, + offset); + NS_ENSURE_STATE(curPositionedDiv); + // Remember our new block for postprocessing + mNewBlock = curPositionedDiv; + // curPositionedDiv is now the correct thing to put curNode in + } + + // Tuck the node into the end of the active blockquote + rv = htmlEditor->MoveNode(curNode, curPositionedDiv, -1); + NS_ENSURE_SUCCESS(rv, rv); + // Forget curList, if any + curList = nullptr; + } + } + } + return NS_OK; +} + +nsresult +HTMLEditRules::DidAbsolutePosition() +{ + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIHTMLAbsPosEditor> absPosHTMLEditor = mHTMLEditor; + nsCOMPtr<nsIDOMElement> elt = + static_cast<nsIDOMElement*>(GetAsDOMNode(mNewBlock)); + return absPosHTMLEditor->AbsolutelyPositionElement(elt, true); +} + +nsresult +HTMLEditRules::WillRemoveAbsolutePosition(Selection* aSelection, + bool* aCancel, + bool* aHandled) { + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + WillInsert(*aSelection, aCancel); + + // initialize out param + // we want to ignore aCancel from WillInsert() + *aCancel = false; + *aHandled = true; + + nsCOMPtr<nsIDOMElement> elt; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetAbsolutelyPositionedSelectionContainer(getter_AddRefs(elt)); + NS_ENSURE_SUCCESS(rv, rv); + + NS_ENSURE_STATE(mHTMLEditor); + AutoSelectionRestorer selectionRestorer(aSelection, mHTMLEditor); + + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIHTMLAbsPosEditor> absPosHTMLEditor = mHTMLEditor; + return absPosHTMLEditor->AbsolutelyPositionElement(elt, false); +} + +nsresult +HTMLEditRules::WillRelativeChangeZIndex(Selection* aSelection, + int32_t aChange, + bool* aCancel, + bool* aHandled) +{ + if (!aSelection || !aCancel || !aHandled) { + return NS_ERROR_NULL_POINTER; + } + WillInsert(*aSelection, aCancel); + + // initialize out param + // we want to ignore aCancel from WillInsert() + *aCancel = false; + *aHandled = true; + + nsCOMPtr<nsIDOMElement> elt; + NS_ENSURE_STATE(mHTMLEditor); + nsresult rv = + mHTMLEditor->GetAbsolutelyPositionedSelectionContainer(getter_AddRefs(elt)); + NS_ENSURE_SUCCESS(rv, rv); + + NS_ENSURE_STATE(mHTMLEditor); + AutoSelectionRestorer selectionRestorer(aSelection, mHTMLEditor); + + NS_ENSURE_STATE(mHTMLEditor); + nsCOMPtr<nsIHTMLAbsPosEditor> absPosHTMLEditor = mHTMLEditor; + int32_t zIndex; + return absPosHTMLEditor->RelativeChangeElementZIndex(elt, aChange, &zIndex); +} + +NS_IMETHODIMP +HTMLEditRules::DocumentModified() +{ + nsContentUtils::AddScriptRunner( + NewRunnableMethod(this, &HTMLEditRules::DocumentModifiedWorker)); + return NS_OK; +} + +void +HTMLEditRules::DocumentModifiedWorker() +{ + if (!mHTMLEditor) { + return; + } + + // DeleteNode below may cause a flush, which could destroy the editor + nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker; + + RefPtr<HTMLEditor> htmlEditor(mHTMLEditor); + RefPtr<Selection> selection = htmlEditor->GetSelection(); + if (!selection) { + return; + } + + // Delete our bogus node, if we have one, since the document might not be + // empty any more. + if (mBogusNode) { + mTextEditor->DeleteNode(mBogusNode); + mBogusNode = nullptr; + } + + // Try to recreate the bogus node if needed. + CreateBogusNodeIfNeeded(selection); +} + +} // namespace mozilla |