Implement spec-compliant HTMLElement.prototype.isContentEditable

third_party/WebKit/Source/core/editing/EditingUtilities.cpp

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 #include "core/editing/EditingUtilities.h"
 
 #include "core/HTMLElementFactory.h"
 #include "core/HTMLNames.h"
+#include "core/MathMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/NodeComputedStyle.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/EditingStrategy.h"
 #include "core/editing/Editor.h"
 #include "core/editing/PlainTextRange.h"
 #include "core/editing/PositionIterator.h"
@@ skipping 10 matching lines @@
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/HTMLLIElement.h"
 #include "core/html/HTMLParagraphElement.h"
 #include "core/html/HTMLSpanElement.h"
 #include "core/html/HTMLTableCellElement.h"
 #include "core/html/HTMLUListElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutTableCell.h"
+#include "core/svg/SVGSVGElement.h"
 #include "wtf/Assertions.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/Unicode.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 namespace {
@@ skipping 222 matching lines @@
     if (editableLevel == RichlyEditable)
         return false;
 
     // FIXME(dmazzoni): support ScopedAXObjectCache (crbug/489851).
     if (AXObjectCache* cache = node.document().existingAXObjectCache())
         return cache->rootAXEditableElement(&node);
 
     return false;
 }
 
+bool isEditingHost(const Node& node)
+{
+    if (!node.isHTMLElement())
+        return false;
+    String ceValue = toHTMLElement(node).contentEditable();
+    if (ceValue == "true" || ceValue == "plaintext-only")
+        return true;
+    if (node.document().inDesignMode() && node.document().documentElement() == &node)
+        return true;
+    return false;
+}

[yoichio, 2016/07/27 01:29:35]

If these functions are just for HTMLEelement::isContentEditable and no one
 won't use them, could you place them inside HTMLElement.cpp?
At least we need to name("isSpecedEditingHost" or something?) to avoid confusing
between existing *edit*-named functions.

+
+bool isEditable(const Node& node)
+{
+    if (isEditingHost(node))
+        return false;
+    if (node.isHTMLElement() && toHTMLElement(node).contentEditable() == "false")
+        return false;
+    if (!node.parentNode())
+        return false;
+    if (!isEditingHost(*node.parentNode()) && !isEditable(*node.parentNode()))
+        return false;
+    if (node.isHTMLElement())
+        return true;
+    if (isSVGSVGElement(node))
+        return true;
+    if (node.isElementNode() && toElement(node).hasTagName(MathMLNames::mathTag))
+        return true;
+    if (!node.isElementNode() && node.parentNode()->isHTMLElement())
+        return true;
+    return false;
+}
+
 bool isContentEditable(const Node& node)
 {
     node.document().updateStyleAndLayoutTree();
     return blink::hasEditableStyle(node, Editable);
 }
 
 bool isContentRichlyEditable(const Node& node)
 {
     node.document().updateStyleAndLayoutTree();
     return blink::hasEditableStyle(node, RichlyEditable);
@@ skipping 1612 matching lines @@
 {
     if (!RuntimeEnabledFeatures::inputEventEnabled())
         return DispatchEventResult::NotCanceled;
     if (!target)
         return DispatchEventResult::NotCanceled;
     InputEvent* beforeInputEvent = InputEvent::createBeforeInput(inputType, data, InputEvent::EventCancelable::IsCancelable, InputEvent::EventIsComposing::NotComposing, ranges);
     return target->dispatchEvent(beforeInputEvent);
 }
 
 } // namespace blink