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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_RENDERER_PAGE_CLICK_TRACKER_H_ | |
| 6 #define CHROME_RENDERER_PAGE_CLICK_TRACKER_H_ | |
| 7 | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/observer_list.h" | |
| 12 #include "content/public/renderer/render_view_observer.h" | |
| 13 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDOMEventListener.h
" | |
| 14 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h" | |
| 15 | |
| 16 class PageClickListener; | |
| 17 | |
| 18 | |
| 19 // This class is responsible for tracking clicks on elements in web pages and | |
| 20 // notifiying the associated listener when a node is clicked. | |
| 21 // Compared to a simple WebDOMEventListener, it offers the added capability of | |
| 22 // notifying the listeners of whether the clicked node was already focused | |
| 23 // before it was clicked. | |
| 24 // | |
| 25 // This is useful for password/form autofill where we want to trigger a | |
| 26 // suggestion popup when a text input is clicked. | |
| 27 // It only notifies of WebInputElement that are text inputs being clicked, but | |
| 28 // could easily be changed to report click on any type of WebNode. | |
| 29 // | |
| 30 // There is one PageClickTracker per RenderView. | |
| 31 class PageClickTracker : public content::RenderViewObserver, | |
| 32 public WebKit::WebDOMEventListener { | |
| 33 public: | |
| 34 explicit PageClickTracker(content::RenderView* render_view); | |
| 35 virtual ~PageClickTracker(); | |
| 36 | |
| 37 // Adds/removes a listener for getting notification when an element is | |
| 38 // clicked. Note that the order of insertion is important as a listener when | |
| 39 // notified can decide to stop the propagation of the event (so that listeners | |
| 40 // inserted after don't get the notification). | |
| 41 void AddListener(PageClickListener* listener); | |
| 42 void RemoveListener(PageClickListener* listener); | |
| 43 | |
| 44 private: | |
| 45 // RenderView::Observer implementation. | |
| 46 virtual void DidFinishDocumentLoad(WebKit::WebFrame* frame) OVERRIDE; | |
| 47 virtual void FrameDetached(WebKit::WebFrame* frame) OVERRIDE; | |
| 48 virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event) OVERRIDE; | |
| 49 | |
| 50 // WebKit::WebDOMEventListener implementation. | |
| 51 virtual void handleEvent(const WebKit::WebDOMEvent& event); | |
| 52 | |
| 53 // Checks to see if a text field is losing focus and inform listeners if | |
| 54 // it is. | |
| 55 void HandleTextFieldMaybeLosingFocus( | |
| 56 const WebKit::WebNode& newly_clicked_node); | |
| 57 | |
| 58 // The last node that was clicked and had focus. | |
| 59 WebKit::WebNode last_node_clicked_; | |
| 60 | |
| 61 // Whether the last clicked node had focused before it was clicked. | |
| 62 bool was_focused_; | |
| 63 | |
| 64 // The frames we are listening to for mouse events. | |
| 65 typedef std::vector<WebKit::WebFrame*> FrameList; | |
| 66 FrameList tracked_frames_; | |
| 67 | |
| 68 // The listener getting the actual notifications. | |
| 69 ObserverList<PageClickListener> listeners_; | |
| 70 | |
| 71 DISALLOW_COPY_AND_ASSIGN(PageClickTracker); | |
| 72 }; | |
| 73 | |
| 74 #endif // CHROME_RENDERER_PAGE_CLICK_TRACKER_H_ | |
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