Add WebElement::isEditable.

Source/web/WebElement.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "public/web/WebElement.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "core/HTMLNames.h"
 #include "core/dom/Element.h"
 #include "core/dom/Fullscreen.h"
-#include "core/dom/NamedNodeMap.h"
 #include "core/dom/custom/CustomElementProcessingStack.h"
+#include "core/html/HTMLTextFormControlElement.h"
 #include "platform/graphics/Image.h"
 #include "public/platform/WebRect.h"
 #include "wtf/PassRefPtr.h"
+#include "wtf/text/AtomicString.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
+using namespace HTMLNames;
+
 bool WebElement::isFormControlElement() const
 {
     return constUnwrap<Element>()->isFormControlElement();
 }
 
 bool WebElement::isTextFormControlElement() const
 {
     return constUnwrap<Element>()->isTextFormControl();
 }
 
+bool WebElement::isEditable() const
+{
+    const Element* element = constUnwrap<Element>();
+
+    if (element->isContentEditable())
+        return true;
+
+    if (element->isTextFormControl()) {
+        const HTMLTextFormControlElement* input = toHTMLTextFormControlElement(element);
+        if (!input->isDisabledOrReadOnly())
+            return true;
+    }
+
+    return equalIgnoringCase(element->getAttribute(roleAttr), "textbox");
+}
+
 WebString WebElement::tagName() const
 {
     return constUnwrap<Element>()->tagName();
 }
 
 bool WebElement::hasHTMLTagName(const WebString& tagName) const
 {
     // How to create                     class              nodeName localName
     // createElement('input')            HTMLInputElement   INPUT    input
     // createElement('INPUT')            HTMLInputElement   INPUT    input
@@ skipping 99 matching lines @@
     m_private = elem;
     return *this;
 }
 
 WebElement::operator PassRefPtrWillBeRawPtr<Element>() const
 {
     return toElement(m_private.get());
 }
 
 } // namespace blink