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Diffstat (limited to 'editor/libeditor/EditorUtils.cpp')
| -rw-r--r-- | editor/libeditor/EditorUtils.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/editor/libeditor/EditorUtils.cpp b/editor/libeditor/EditorUtils.cpp new file mode 100644 index 000000000..4ec60c830 --- /dev/null +++ b/editor/libeditor/EditorUtils.cpp @@ -0,0 +1,227 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "mozilla/EditorUtils.h" + +#include "mozilla/OwningNonNull.h" +#include "mozilla/dom/Selection.h" +#include "nsComponentManagerUtils.h" +#include "nsError.h" +#include "nsIClipboardDragDropHookList.h" +// hooks +#include "nsIClipboardDragDropHooks.h" +#include "nsIContent.h" +#include "nsIContentIterator.h" +#include "nsIDOMDocument.h" +#include "nsIDocShell.h" +#include "nsIDocument.h" +#include "nsIInterfaceRequestorUtils.h" +#include "nsINode.h" +#include "nsISimpleEnumerator.h" + +class nsISupports; +class nsRange; + +namespace mozilla { + +using namespace dom; + +/****************************************************************************** + * AutoSelectionRestorer + *****************************************************************************/ + +AutoSelectionRestorer::AutoSelectionRestorer( + Selection* aSelection, + EditorBase* aEditorBase + MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL) + : mEditorBase(nullptr) +{ + MOZ_GUARD_OBJECT_NOTIFIER_INIT; + if (NS_WARN_IF(!aSelection) || NS_WARN_IF(!aEditorBase)) { + return; + } + if (aEditorBase->ArePreservingSelection()) { + // We already have initialized mSavedSel, so this must be nested call. + return; + } + mSelection = aSelection; + mEditorBase = aEditorBase; + mEditorBase->PreserveSelectionAcrossActions(mSelection); +} + +AutoSelectionRestorer::~AutoSelectionRestorer() +{ + NS_ASSERTION(!mSelection || mEditorBase, + "mEditorBase should be non-null when mSelection is"); + // mSelection will be null if this was nested call. + if (mSelection && mEditorBase->ArePreservingSelection()) { + mEditorBase->RestorePreservedSelection(mSelection); + } +} + +void +AutoSelectionRestorer::Abort() +{ + NS_ASSERTION(!mSelection || mEditorBase, + "mEditorBase should be non-null when mSelection is"); + if (mSelection) { + mEditorBase->StopPreservingSelection(); + } +} + +/****************************************************************************** + * some helper classes for iterating the dom tree + *****************************************************************************/ + +DOMIterator::DOMIterator(nsINode& aNode MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL) +{ + MOZ_GUARD_OBJECT_NOTIFIER_INIT; + mIter = NS_NewContentIterator(); + DebugOnly<nsresult> rv = mIter->Init(&aNode); + MOZ_ASSERT(NS_SUCCEEDED(rv)); +} + +nsresult +DOMIterator::Init(nsRange& aRange) +{ + mIter = NS_NewContentIterator(); + return mIter->Init(&aRange); +} + +DOMIterator::DOMIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_IN_IMPL) +{ + MOZ_GUARD_OBJECT_NOTIFIER_INIT; +} + +DOMIterator::~DOMIterator() +{ +} + +void +DOMIterator::AppendList(const BoolDomIterFunctor& functor, + nsTArray<OwningNonNull<nsINode>>& arrayOfNodes) const +{ + // Iterate through dom and build list + for (; !mIter->IsDone(); mIter->Next()) { + nsCOMPtr<nsINode> node = mIter->GetCurrentNode(); + + if (functor(node)) { + arrayOfNodes.AppendElement(*node); + } + } +} + +DOMSubtreeIterator::DOMSubtreeIterator( + MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_IN_IMPL) + : DOMIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_TO_PARENT) +{ +} + +nsresult +DOMSubtreeIterator::Init(nsRange& aRange) +{ + mIter = NS_NewContentSubtreeIterator(); + return mIter->Init(&aRange); +} + +DOMSubtreeIterator::~DOMSubtreeIterator() +{ +} + +/****************************************************************************** + * some general purpose editor utils + *****************************************************************************/ + +bool +EditorUtils::IsDescendantOf(nsINode* aNode, + nsINode* aParent, + int32_t* aOffset) +{ + MOZ_ASSERT(aNode && aParent); + if (aNode == aParent) { + return false; + } + + for (nsCOMPtr<nsINode> node = aNode; node; node = node->GetParentNode()) { + if (node->GetParentNode() == aParent) { + if (aOffset) { + *aOffset = aParent->IndexOf(node); + } + return true; + } + } + + return false; +} + +bool +EditorUtils::IsDescendantOf(nsIDOMNode* aNode, + nsIDOMNode* aParent, + int32_t* aOffset) +{ + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + nsCOMPtr<nsINode> parent = do_QueryInterface(aParent); + NS_ENSURE_TRUE(node && parent, false); + return IsDescendantOf(node, parent, aOffset); +} + +bool +EditorUtils::IsLeafNode(nsIDOMNode* aNode) +{ + bool hasChildren = false; + if (aNode) + aNode->HasChildNodes(&hasChildren); + return !hasChildren; +} + +/****************************************************************************** + * utility methods for drag/drop/copy/paste hooks + *****************************************************************************/ + +nsresult +EditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument* aDoc, + nsISimpleEnumerator** aResult) +{ + nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc); + NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE); + + nsCOMPtr<nsIDocShell> docShell = doc->GetDocShell(); + nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell); + NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE); + + return hookObj->GetHookEnumerator(aResult); +} + +bool +EditorHookUtils::DoInsertionHook(nsIDOMDocument* aDoc, + nsIDOMEvent* aDropEvent, + nsITransferable *aTrans) +{ + nsCOMPtr<nsISimpleEnumerator> enumerator; + GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator)); + NS_ENSURE_TRUE(enumerator, true); + + bool hasMoreHooks = false; + while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && + hasMoreHooks) { + nsCOMPtr<nsISupports> isupp; + if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp)))) { + break; + } + + nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp); + if (override) { + bool doInsert = true; + DebugOnly<nsresult> hookResult = + override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert); + NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop"); + NS_ENSURE_TRUE(doInsert, false); + } + } + + return true; +} + +} // namespace mozilla |