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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /editor/libeditor/HTMLAnonymousNodeEditor.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'editor/libeditor/HTMLAnonymousNodeEditor.cpp')
-rw-r--r--editor/libeditor/HTMLAnonymousNodeEditor.cpp548
1 files changed, 548 insertions, 0 deletions
diff --git a/editor/libeditor/HTMLAnonymousNodeEditor.cpp b/editor/libeditor/HTMLAnonymousNodeEditor.cpp
new file mode 100644
index 000000000..48f20fd04
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+++ b/editor/libeditor/HTMLAnonymousNodeEditor.cpp
@@ -0,0 +1,548 @@
+/* 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/HTMLEditor.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/mozalloc.h"
+#include "nsAString.h"
+#include "nsCOMPtr.h"
+#include "nsComputedDOMStyle.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsGkAtoms.h"
+#include "nsIAtom.h"
+#include "nsIContent.h"
+#include "nsID.h"
+#include "nsIDOMCSSPrimitiveValue.h"
+#include "nsIDOMCSSStyleDeclaration.h"
+#include "nsIDOMCSSValue.h"
+#include "nsIDOMElement.h"
+#include "nsIDOMEventTarget.h"
+#include "nsIDOMHTMLElement.h"
+#include "nsIDOMNode.h"
+#include "nsIDOMWindow.h"
+#include "nsIDocument.h"
+#include "nsIDocumentObserver.h"
+#include "nsIHTMLAbsPosEditor.h"
+#include "nsIHTMLInlineTableEditor.h"
+#include "nsIHTMLObjectResizer.h"
+#include "nsStubMutationObserver.h"
+#include "nsINode.h"
+#include "nsIPresShell.h"
+#include "nsISupportsImpl.h"
+#include "nsISupportsUtils.h"
+#include "nsLiteralString.h"
+#include "nsPresContext.h"
+#include "nsReadableUtils.h"
+#include "nsString.h"
+#include "nsStringFwd.h"
+#include "nsUnicharUtils.h"
+#include "nscore.h"
+#include "nsContentUtils.h" // for nsAutoScriptBlocker
+
+class nsIDOMEventListener;
+class nsISelection;
+
+namespace mozilla {
+
+using namespace dom;
+
+// retrieve an integer stored into a CSS computed float value
+static int32_t GetCSSFloatValue(nsIDOMCSSStyleDeclaration * aDecl,
+ const nsAString & aProperty)
+{
+ MOZ_ASSERT(aDecl);
+
+ nsCOMPtr<nsIDOMCSSValue> value;
+ // get the computed CSSValue of the property
+ nsresult rv = aDecl->GetPropertyCSSValue(aProperty, getter_AddRefs(value));
+ if (NS_FAILED(rv) || !value) {
+ return 0;
+ }
+
+ // check the type of the returned CSSValue; we handle here only
+ // pixel and enum types
+ nsCOMPtr<nsIDOMCSSPrimitiveValue> val = do_QueryInterface(value);
+ uint16_t type;
+ val->GetPrimitiveType(&type);
+
+ float f = 0;
+ switch (type) {
+ case nsIDOMCSSPrimitiveValue::CSS_PX:
+ // the value is in pixels, just get it
+ rv = val->GetFloatValue(nsIDOMCSSPrimitiveValue::CSS_PX, &f);
+ NS_ENSURE_SUCCESS(rv, 0);
+ break;
+ case nsIDOMCSSPrimitiveValue::CSS_IDENT: {
+ // the value is keyword, we have to map these keywords into
+ // numeric values
+ nsAutoString str;
+ val->GetStringValue(str);
+ if (str.EqualsLiteral("thin")) {
+ f = 1;
+ } else if (str.EqualsLiteral("medium")) {
+ f = 3;
+ } else if (str.EqualsLiteral("thick")) {
+ f = 5;
+ }
+ break;
+ }
+ }
+
+ return (int32_t) f;
+}
+
+class ElementDeletionObserver final : public nsStubMutationObserver
+{
+public:
+ ElementDeletionObserver(nsIContent* aNativeAnonNode,
+ nsIContent* aObservedNode)
+ : mNativeAnonNode(aNativeAnonNode)
+ , mObservedNode(aObservedNode)
+ {}
+
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
+ NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
+
+protected:
+ ~ElementDeletionObserver() {}
+ nsIContent* mNativeAnonNode;
+ nsIContent* mObservedNode;
+};
+
+NS_IMPL_ISUPPORTS(ElementDeletionObserver, nsIMutationObserver)
+
+void
+ElementDeletionObserver::ParentChainChanged(nsIContent* aContent)
+{
+ // If the native anonymous content has been unbound already in
+ // DeleteRefToAnonymousNode, mNativeAnonNode's parentNode is null.
+ if (aContent == mObservedNode && mNativeAnonNode &&
+ mNativeAnonNode->GetParentNode() == aContent) {
+ // If the observed node has been moved to another document, there isn't much
+ // we can do easily. But at least be safe and unbind the native anonymous
+ // content and stop observing changes.
+ if (mNativeAnonNode->OwnerDoc() != mObservedNode->OwnerDoc()) {
+ mObservedNode->RemoveMutationObserver(this);
+ mObservedNode = nullptr;
+ mNativeAnonNode->RemoveMutationObserver(this);
+ mNativeAnonNode->UnbindFromTree();
+ mNativeAnonNode = nullptr;
+ NS_RELEASE_THIS();
+ return;
+ }
+
+ // We're staying in the same document, just rebind the native anonymous
+ // node so that the subtree root points to the right object etc.
+ mNativeAnonNode->UnbindFromTree();
+ mNativeAnonNode->BindToTree(mObservedNode->GetUncomposedDoc(), mObservedNode,
+ mObservedNode, true);
+ }
+}
+
+void
+ElementDeletionObserver::NodeWillBeDestroyed(const nsINode* aNode)
+{
+ NS_ASSERTION(aNode == mNativeAnonNode || aNode == mObservedNode,
+ "Wrong aNode!");
+ if (aNode == mNativeAnonNode) {
+ mObservedNode->RemoveMutationObserver(this);
+ mObservedNode = nullptr;
+ } else {
+ mNativeAnonNode->RemoveMutationObserver(this);
+ mNativeAnonNode->UnbindFromTree();
+ mNativeAnonNode = nullptr;
+ }
+
+ NS_RELEASE_THIS();
+}
+
+// Returns in *aReturn an anonymous nsDOMElement of type aTag,
+// child of aParentNode. If aIsCreatedHidden is true, the class
+// "hidden" is added to the created element. If aAnonClass is not
+// the empty string, it becomes the value of the attribute "_moz_anonclass"
+nsresult
+HTMLEditor::CreateAnonymousElement(const nsAString& aTag,
+ nsIDOMNode* aParentNode,
+ const nsAString& aAnonClass,
+ bool aIsCreatedHidden,
+ nsIDOMElement** aReturn)
+{
+ NS_ENSURE_ARG_POINTER(aParentNode);
+ NS_ENSURE_ARG_POINTER(aReturn);
+ *aReturn = nullptr;
+
+ nsCOMPtr<nsIContent> parentContent( do_QueryInterface(aParentNode) );
+ NS_ENSURE_TRUE(parentContent, NS_OK);
+
+ nsCOMPtr<nsIDocument> doc = GetDocument();
+ NS_ENSURE_TRUE(doc, NS_ERROR_NULL_POINTER);
+
+ // Get the pres shell
+ nsCOMPtr<nsIPresShell> ps = GetPresShell();
+ NS_ENSURE_TRUE(ps, NS_ERROR_NOT_INITIALIZED);
+
+ // Create a new node through the element factory
+ nsCOMPtr<nsIAtom> tagAtom = NS_Atomize(aTag);
+ nsCOMPtr<Element> newContent = CreateHTMLContent(tagAtom);
+ NS_ENSURE_STATE(newContent);
+
+ nsCOMPtr<nsIDOMElement> newElement = do_QueryInterface(newContent);
+ NS_ENSURE_TRUE(newElement, NS_ERROR_FAILURE);
+
+ // add the "hidden" class if needed
+ if (aIsCreatedHidden) {
+ nsresult rv = newElement->SetAttribute(NS_LITERAL_STRING("class"),
+ NS_LITERAL_STRING("hidden"));
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+
+ // add an _moz_anonclass attribute if needed
+ if (!aAnonClass.IsEmpty()) {
+ nsresult rv = newElement->SetAttribute(NS_LITERAL_STRING("_moz_anonclass"),
+ aAnonClass);
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+
+ {
+ nsAutoScriptBlocker scriptBlocker;
+
+ // establish parenthood of the element
+ newContent->SetIsNativeAnonymousRoot();
+ nsresult rv =
+ newContent->BindToTree(doc, parentContent, parentContent, true);
+ if (NS_FAILED(rv)) {
+ newContent->UnbindFromTree();
+ return rv;
+ }
+ }
+
+ ElementDeletionObserver* observer =
+ new ElementDeletionObserver(newContent, parentContent);
+ NS_ADDREF(observer); // NodeWillBeDestroyed releases.
+ parentContent->AddMutationObserver(observer);
+ newContent->AddMutationObserver(observer);
+
+#ifdef DEBUG
+ // Editor anonymous content gets passed to RecreateFramesFor... which can't
+ // _really_ deal with anonymous content (because it can't get the frame tree
+ // ordering right). But for us the ordering doesn't matter so this is sort of
+ // ok.
+ newContent->SetProperty(nsGkAtoms::restylableAnonymousNode,
+ reinterpret_cast<void*>(true));
+#endif // DEBUG
+
+ // display the element
+ ps->RecreateFramesFor(newContent);
+
+ newElement.forget(aReturn);
+ return NS_OK;
+}
+
+// Removes event listener and calls DeleteRefToAnonymousNode.
+void
+HTMLEditor::RemoveListenerAndDeleteRef(const nsAString& aEvent,
+ nsIDOMEventListener* aListener,
+ bool aUseCapture,
+ Element* aElement,
+ nsIContent* aParentContent,
+ nsIPresShell* aShell)
+{
+ nsCOMPtr<nsIDOMEventTarget> evtTarget(do_QueryInterface(aElement));
+ if (evtTarget) {
+ evtTarget->RemoveEventListener(aEvent, aListener, aUseCapture);
+ }
+ DeleteRefToAnonymousNode(static_cast<nsIDOMElement*>(GetAsDOMNode(aElement)), aParentContent, aShell);
+}
+
+// Deletes all references to an anonymous element
+void
+HTMLEditor::DeleteRefToAnonymousNode(nsIDOMElement* aElement,
+ nsIContent* aParentContent,
+ nsIPresShell* aShell)
+{
+ // call ContentRemoved() for the anonymous content
+ // node so its references get removed from the frame manager's
+ // undisplay map, and its layout frames get destroyed!
+
+ if (aElement) {
+ nsCOMPtr<nsIContent> content = do_QueryInterface(aElement);
+ if (content) {
+ nsAutoScriptBlocker scriptBlocker;
+ // Need to check whether aShell has been destroyed (but not yet deleted).
+ // In that case presContext->GetPresShell() returns nullptr.
+ // See bug 338129.
+ if (content->IsInComposedDoc() && aShell && aShell->GetPresContext() &&
+ aShell->GetPresContext()->GetPresShell() == aShell) {
+ nsCOMPtr<nsIDocumentObserver> docObserver = do_QueryInterface(aShell);
+ if (docObserver) {
+ // Call BeginUpdate() so that the nsCSSFrameConstructor/PresShell
+ // knows we're messing with the frame tree.
+ nsCOMPtr<nsIDocument> document = GetDocument();
+ if (document) {
+ docObserver->BeginUpdate(document, UPDATE_CONTENT_MODEL);
+ }
+
+ // XXX This is wrong (bug 439258). Once it's fixed, the NS_WARNING
+ // in RestyleManager::RestyleForRemove should be changed back
+ // to an assertion.
+ docObserver->ContentRemoved(content->GetComposedDoc(),
+ aParentContent, content, -1,
+ content->GetPreviousSibling());
+ if (document) {
+ docObserver->EndUpdate(document, UPDATE_CONTENT_MODEL);
+ }
+ }
+ }
+ content->UnbindFromTree();
+ }
+ }
+}
+
+// The following method is mostly called by a selection listener. When a
+// selection change is notified, the method is called to check if resizing
+// handles, a grabber and/or inline table editing UI need to be displayed
+// or refreshed
+NS_IMETHODIMP
+HTMLEditor::CheckSelectionStateForAnonymousButtons(nsISelection* aSelection)
+{
+ NS_ENSURE_ARG_POINTER(aSelection);
+
+ // early way out if all contextual UI extensions are disabled
+ NS_ENSURE_TRUE(mIsObjectResizingEnabled ||
+ mIsAbsolutelyPositioningEnabled ||
+ mIsInlineTableEditingEnabled, NS_OK);
+
+ // Don't change selection state if we're moving.
+ if (mIsMoving) {
+ return NS_OK;
+ }
+
+ nsCOMPtr<nsIDOMElement> focusElement;
+ // let's get the containing element of the selection
+ nsresult rv = GetSelectionContainer(getter_AddRefs(focusElement));
+ NS_ENSURE_TRUE(focusElement, NS_OK);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // If we're not in a document, don't try to add resizers
+ nsCOMPtr<dom::Element> focusElementNode = do_QueryInterface(focusElement);
+ NS_ENSURE_STATE(focusElementNode);
+ if (!focusElementNode->IsInUncomposedDoc()) {
+ return NS_OK;
+ }
+
+ // what's its tag?
+ nsAutoString focusTagName;
+ rv = focusElement->GetTagName(focusTagName);
+ NS_ENSURE_SUCCESS(rv, rv);
+ ToLowerCase(focusTagName);
+ nsCOMPtr<nsIAtom> focusTagAtom = NS_Atomize(focusTagName);
+
+ nsCOMPtr<nsIDOMElement> absPosElement;
+ if (mIsAbsolutelyPositioningEnabled) {
+ // Absolute Positioning support is enabled, is the selection contained
+ // in an absolutely positioned element ?
+ rv =
+ GetAbsolutelyPositionedSelectionContainer(getter_AddRefs(absPosElement));
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+
+ nsCOMPtr<nsIDOMElement> cellElement;
+ if (mIsObjectResizingEnabled || mIsInlineTableEditingEnabled) {
+ // Resizing or Inline Table Editing is enabled, we need to check if the
+ // selection is contained in a table cell
+ rv = GetElementOrParentByTagName(NS_LITERAL_STRING("td"),
+ nullptr,
+ getter_AddRefs(cellElement));
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+
+ if (mIsObjectResizingEnabled && cellElement) {
+ // we are here because Resizing is enabled AND selection is contained in
+ // a cell
+
+ // get the enclosing table
+ if (nsGkAtoms::img != focusTagAtom) {
+ // the element container of the selection is not an image, so we'll show
+ // the resizers around the table
+ nsCOMPtr<nsIDOMNode> tableNode = GetEnclosingTable(cellElement);
+ focusElement = do_QueryInterface(tableNode);
+ focusTagAtom = nsGkAtoms::table;
+ }
+ }
+
+ // we allow resizers only around images, tables, and absolutely positioned
+ // elements. If we don't have image/table, let's look at the latter case.
+ if (nsGkAtoms::img != focusTagAtom && nsGkAtoms::table != focusTagAtom) {
+ focusElement = absPosElement;
+ }
+
+ // at this point, focusElement contains the element for Resizing,
+ // cellElement contains the element for InlineTableEditing
+ // absPosElement contains the element for Positioning
+
+ // Note: All the Hide/Show methods below may change attributes on real
+ // content which means a DOMAttrModified handler may cause arbitrary
+ // side effects while this code runs (bug 420439).
+
+ if (mIsAbsolutelyPositioningEnabled && mAbsolutelyPositionedObject &&
+ absPosElement != GetAsDOMNode(mAbsolutelyPositionedObject)) {
+ rv = HideGrabber();
+ NS_ENSURE_SUCCESS(rv, rv);
+ NS_ASSERTION(!mAbsolutelyPositionedObject, "HideGrabber failed");
+ }
+
+ if (mIsObjectResizingEnabled && mResizedObject &&
+ GetAsDOMNode(mResizedObject) != focusElement) {
+ rv = HideResizers();
+ NS_ENSURE_SUCCESS(rv, rv);
+ NS_ASSERTION(!mResizedObject, "HideResizers failed");
+ }
+
+ if (mIsInlineTableEditingEnabled && mInlineEditedCell &&
+ mInlineEditedCell != cellElement) {
+ rv = HideInlineTableEditingUI();
+ NS_ENSURE_SUCCESS(rv, rv);
+ NS_ASSERTION(!mInlineEditedCell, "HideInlineTableEditingUI failed");
+ }
+
+ // now, let's display all contextual UI for good
+ nsIContent* hostContent = GetActiveEditingHost();
+ nsCOMPtr<nsIDOMNode> hostNode = do_QueryInterface(hostContent);
+
+ if (mIsObjectResizingEnabled && focusElement &&
+ IsModifiableNode(focusElement) && focusElement != hostNode) {
+ if (nsGkAtoms::img == focusTagAtom) {
+ mResizedObjectIsAnImage = true;
+ }
+ if (mResizedObject) {
+ nsresult rv = RefreshResizers();
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ } else {
+ nsresult rv = ShowResizers(focusElement);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ }
+ }
+
+ if (mIsAbsolutelyPositioningEnabled && absPosElement &&
+ IsModifiableNode(absPosElement) && absPosElement != hostNode) {
+ if (mAbsolutelyPositionedObject) {
+ nsresult rv = RefreshGrabber();
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ } else {
+ nsresult rv = ShowGrabberOnElement(absPosElement);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ }
+ }
+
+ if (mIsInlineTableEditingEnabled && cellElement &&
+ IsModifiableNode(cellElement) && cellElement != hostNode) {
+ if (mInlineEditedCell) {
+ nsresult rv = RefreshInlineTableEditingUI();
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ } else {
+ nsresult rv = ShowInlineTableEditingUI(cellElement);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+ }
+ }
+
+ return NS_OK;
+}
+
+// Resizing and Absolute Positioning need to know everything about the
+// containing box of the element: position, size, margins, borders
+nsresult
+HTMLEditor::GetPositionAndDimensions(nsIDOMElement* aElement,
+ int32_t& aX,
+ int32_t& aY,
+ int32_t& aW,
+ int32_t& aH,
+ int32_t& aBorderLeft,
+ int32_t& aBorderTop,
+ int32_t& aMarginLeft,
+ int32_t& aMarginTop)
+{
+ nsCOMPtr<Element> element = do_QueryInterface(aElement);
+ NS_ENSURE_ARG_POINTER(element);
+
+ // Is the element positioned ? let's check the cheap way first...
+ bool isPositioned = false;
+ nsresult rv =
+ aElement->HasAttribute(NS_LITERAL_STRING("_moz_abspos"), &isPositioned);
+ NS_ENSURE_SUCCESS(rv, rv);
+ if (!isPositioned) {
+ // hmmm... the expensive way now...
+ nsAutoString positionStr;
+ mCSSEditUtils->GetComputedProperty(*element, *nsGkAtoms::position,
+ positionStr);
+ isPositioned = positionStr.EqualsLiteral("absolute");
+ }
+
+ if (isPositioned) {
+ // Yes, it is absolutely positioned
+ mResizedObjectIsAbsolutelyPositioned = true;
+
+ // Get the all the computed css styles attached to the element node
+ RefPtr<nsComputedDOMStyle> cssDecl =
+ mCSSEditUtils->GetComputedStyle(element);
+ NS_ENSURE_STATE(cssDecl);
+
+ aBorderLeft = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("border-left-width"));
+ aBorderTop = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("border-top-width"));
+ aMarginLeft = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("margin-left"));
+ aMarginTop = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("margin-top"));
+
+ aX = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("left")) +
+ aMarginLeft + aBorderLeft;
+ aY = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("top")) +
+ aMarginTop + aBorderTop;
+ aW = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("width"));
+ aH = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("height"));
+ } else {
+ mResizedObjectIsAbsolutelyPositioned = false;
+ nsCOMPtr<nsIDOMHTMLElement> htmlElement = do_QueryInterface(aElement);
+ if (!htmlElement) {
+ return NS_ERROR_NULL_POINTER;
+ }
+ GetElementOrigin(aElement, aX, aY);
+
+ if (NS_WARN_IF(NS_FAILED(htmlElement->GetOffsetWidth(&aW))) ||
+ NS_WARN_IF(NS_FAILED(htmlElement->GetOffsetHeight(&aH)))) {
+ return rv;
+ }
+
+ aBorderLeft = 0;
+ aBorderTop = 0;
+ aMarginLeft = 0;
+ aMarginTop = 0;
+ }
+ return NS_OK;
+}
+
+// self-explanatory
+void
+HTMLEditor::SetAnonymousElementPosition(int32_t aX,
+ int32_t aY,
+ nsIDOMElement* aElement)
+{
+ mCSSEditUtils->SetCSSPropertyPixels(aElement, NS_LITERAL_STRING("left"), aX);
+ mCSSEditUtils->SetCSSPropertyPixels(aElement, NS_LITERAL_STRING("top"), aY);
+}
+
+} // namespace mozilla