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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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