Add supports that allow Autofill to be initiated from textarea field

components/autofill/content/renderer/page_click_tracker.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/content/renderer/page_click_tracker.h"
 
 #include "components/autofill/content/renderer/form_autofill_util.h"
 #include "components/autofill/content/renderer/page_click_listener.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebDOMMouseEvent.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebInputElement.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
+#include "third_party/WebKit/public/web/WebTextAreaElement.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 using blink::WebDOMEvent;
 using blink::WebDOMMouseEvent;
 using blink::WebElement;
 using blink::WebFormControlElement;
 using blink::WebFrame;
 using blink::WebInputElement;
 using blink::WebInputEvent;
 using blink::WebMouseEvent;
 using blink::WebNode;
 using blink::WebString;
+using blink::WebTextAreaElement;
 using blink::WebView;
 
 namespace {
 
 // Casts |node| to a WebInputElement.
 // Returns an empty (isNull()) WebInputElement if |node| is not a text field.
 const WebInputElement GetTextWebInputElement(const WebNode& node) {
   if (!node.isElementNode())
     return WebInputElement();
   const WebElement element = node.toConst<WebElement>();
   if (!element.hasTagName("input"))
     return WebInputElement();
   const WebInputElement* input = blink::toWebInputElement(&element);
   if (!autofill::IsTextInput(input))
     return WebInputElement();
   return *input;
 }
 
+// Casts |node| to a WebTextAreaElement.
+// Returns an empty (isNull()) WebTextAreaElement if |node| is not a
+// textarea field.
+const WebTextAreaElement GetTextWebTextAreaElement(const WebNode& node) {
+  if (!node.isElementNode())
+    return WebTextAreaElement();
+  const WebElement element = node.toConst<WebElement>();
+  if (!element.hasTagName("textarea"))
+    return WebTextAreaElement();
+  const WebFormControlElement& controlElement =
+      element.toConst<WebFormControlElement>();
+  if (!autofill::IsTextAreaElement(controlElement))
+    return WebTextAreaElement();
+  const WebTextAreaElement text_area =
+      controlElement.toConst<WebTextAreaElement>();
+  return text_area;
+}
+
 // Checks to see if a text field was the previously selected node and is now
 // losing its focus.
 bool DidSelectedTextFieldLoseFocus(const WebNode& newly_clicked_node) {
   blink::WebNode focused_node = newly_clicked_node.document().focusedNode();
 
-  if (focused_node.isNull() || GetTextWebInputElement(focused_node).isNull())
+  if (focused_node.isNull() ||
+      (GetTextWebInputElement(focused_node).isNull() &&
+       GetTextWebTextAreaElement(focused_node).isNull()))
     return false;
 
   return focused_node != newly_clicked_node;
 }
 
 }  // namespace
 
 namespace autofill {
 
 PageClickTracker::PageClickTracker(content::RenderView* render_view,
@@ skipping 11 matching lines @@
   // unregister listeners in frames remaining in tracked_frames_ as they might
   // be invalid.
 }
 
 void PageClickTracker::DidHandleMouseEvent(const WebMouseEvent& event) {
   if (event.type != WebInputEvent::MouseDown ||
       last_node_clicked_.isNull()) {
     return;
   }
 
-  // We are only interested in text field clicks.
+  // We are only interested in text field and textarea field clicks.
   const WebInputElement input_element =
       GetTextWebInputElement(last_node_clicked_);
-  if (input_element.isNull())
+  const WebTextAreaElement textarea_element =
+      GetTextWebTextAreaElement(last_node_clicked_);
+  if (input_element.isNull() && textarea_element.isNull())
     return;
 
   bool is_focused = (last_node_clicked_ == render_view()->GetFocusedNode());
-  listener_->InputElementClicked(input_element, was_focused_, is_focused);
+  if (!input_element.isNull())
+      listener_->InputElementClicked(input_element, was_focused_, is_focused);
+  if (!textarea_element.isNull())
+      listener_->TextAreaElementClicked(textarea_element,
+                                        was_focused_, is_focused);
 }
 
 void PageClickTracker::DidFinishDocumentLoad(blink::WebFrame* frame) {
   tracked_frames_.push_back(frame);
   frame->document().addEventListener("mousedown", this, false);
 }
 
 void PageClickTracker::FrameDetached(blink::WebFrame* frame) {
   std::vector<blink::WebFrame*>::iterator iter =
       std::find(tracked_frames_.begin(), tracked_frames_.end(), frame);
@@ skipping 22 matching lines @@
   // (DidHandleMouseEvent), we'll notify the listener at that point.
   WebNode node = mouse_event.target();
   if (node.isNull())
     // Node may be null if the target was an SVG instance element from a <use>
     // tree and the tree has been rebuilt due to an earlier event.
     return;
 
   HandleTextFieldMaybeLosingFocus(node);
 
   // We are only interested in text field clicks.
-  if (GetTextWebInputElement(node).isNull())
+  if (GetTextWebInputElement(node).isNull() &&
+      GetTextWebTextAreaElement(node).isNull())
     return;
 
   last_node_clicked_ = node;
   was_focused_ = (node.document().focusedNode() == last_node_clicked_);
 }
 
 void PageClickTracker::HandleTextFieldMaybeLosingFocus(
     const WebNode& newly_clicked_node) {
   if (DidSelectedTextFieldLoseFocus(newly_clicked_node))
-    listener_->InputElementLostFocus();
+    listener_->FormControlElementLostFocus();
 }
 
 }  // namespace autofill