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1 // Copyright (c) 2012 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 #include "components/autofill/renderer/page_click_tracker.h" | |
6 | |
7 #include "components/autofill/renderer/form_autofill_util.h" | |
8 #include "components/autofill/renderer/page_click_listener.h" | |
9 #include "content/public/renderer/render_view.h" | |
10 #include "third_party/WebKit/public/platform/WebString.h" | |
11 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDOMMouseEvent.h" | |
12 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h" | |
13 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h" | |
14 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputElement.h" | |
15 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h" | |
16 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h" | |
17 | |
18 using WebKit::WebDOMEvent; | |
19 using WebKit::WebDOMMouseEvent; | |
20 using WebKit::WebElement; | |
21 using WebKit::WebFormControlElement; | |
22 using WebKit::WebFrame; | |
23 using WebKit::WebInputElement; | |
24 using WebKit::WebInputEvent; | |
25 using WebKit::WebMouseEvent; | |
26 using WebKit::WebNode; | |
27 using WebKit::WebString; | |
28 using WebKit::WebView; | |
29 | |
30 namespace { | |
31 | |
32 // Casts |node| to a WebInputElement. | |
33 // Returns an empty (isNull()) WebInputElement if |node| is not a text field. | |
34 const WebInputElement GetTextWebInputElement(const WebNode& node) { | |
35 if (!node.isElementNode()) | |
36 return WebInputElement(); | |
37 const WebElement element = node.toConst<WebElement>(); | |
38 if (!element.hasTagName("input")) | |
39 return WebInputElement(); | |
40 const WebInputElement* input = WebKit::toWebInputElement(&element); | |
41 if (!autofill::IsTextInput(input)) | |
42 return WebInputElement(); | |
43 return *input; | |
44 } | |
45 | |
46 // Checks to see if a text field was the previously selected node and is now | |
47 // losing its focus. | |
48 bool DidSelectedTextFieldLoseFocus(const WebNode& newly_clicked_node) { | |
49 WebKit::WebNode focused_node = newly_clicked_node.document().focusedNode(); | |
50 | |
51 if (focused_node.isNull() || GetTextWebInputElement(focused_node).isNull()) | |
52 return false; | |
53 | |
54 return focused_node != newly_clicked_node; | |
55 } | |
56 | |
57 } // namespace | |
58 | |
59 namespace autofill { | |
60 | |
61 PageClickTracker::PageClickTracker(content::RenderView* render_view, | |
62 PageClickListener* listener) | |
63 : content::RenderViewObserver(render_view), | |
64 was_focused_(false), | |
65 listener_(listener) { | |
66 } | |
67 | |
68 PageClickTracker::~PageClickTracker() { | |
69 // Note that even though RenderView calls FrameDetached when notified that | |
70 // a frame was closed, it might not always get that notification from WebKit | |
71 // for all frames. | |
72 // By the time we get here, the frame could have been destroyed so we cannot | |
73 // unregister listeners in frames remaining in tracked_frames_ as they might | |
74 // be invalid. | |
75 } | |
76 | |
77 void PageClickTracker::DidHandleMouseEvent(const WebMouseEvent& event) { | |
78 if (event.type != WebInputEvent::MouseDown || | |
79 last_node_clicked_.isNull()) { | |
80 return; | |
81 } | |
82 | |
83 // We are only interested in text field clicks. | |
84 const WebInputElement input_element = | |
85 GetTextWebInputElement(last_node_clicked_); | |
86 if (input_element.isNull()) | |
87 return; | |
88 | |
89 bool is_focused = (last_node_clicked_ == render_view()->GetFocusedNode()); | |
90 listener_->InputElementClicked(input_element, was_focused_, is_focused); | |
91 } | |
92 | |
93 void PageClickTracker::DidFinishDocumentLoad(WebKit::WebFrame* frame) { | |
94 tracked_frames_.push_back(frame); | |
95 frame->document().addEventListener("mousedown", this, false); | |
96 } | |
97 | |
98 void PageClickTracker::FrameDetached(WebKit::WebFrame* frame) { | |
99 std::vector<WebKit::WebFrame*>::iterator iter = | |
100 std::find(tracked_frames_.begin(), tracked_frames_.end(), frame); | |
101 if (iter == tracked_frames_.end()) { | |
102 // Some frames might never load contents so we may not have a listener on | |
103 // them. Calling removeEventListener() on them would trigger an assert, so | |
104 // we need to keep track of which frames we are listening to. | |
105 return; | |
106 } | |
107 tracked_frames_.erase(iter); | |
108 } | |
109 | |
110 void PageClickTracker::handleEvent(const WebDOMEvent& event) { | |
111 last_node_clicked_.reset(); | |
112 | |
113 if (!event.isMouseEvent()) | |
114 return; | |
115 | |
116 const WebDOMMouseEvent mouse_event = event.toConst<WebDOMMouseEvent>(); | |
117 DCHECK(mouse_event.buttonDown()); | |
118 if (mouse_event.button() != 0) | |
119 return; // We are only interested in left clicks. | |
120 | |
121 // Remember which node has focus before the click is processed. | |
122 // We'll get a notification once the mouse event has been processed | |
123 // (DidHandleMouseEvent), we'll notify the listener at that point. | |
124 WebNode node = mouse_event.target(); | |
125 if (node.isNull()) | |
126 // Node may be null if the target was an SVG instance element from a <use> | |
127 // tree and the tree has been rebuilt due to an earlier event. | |
128 return; | |
129 | |
130 HandleTextFieldMaybeLosingFocus(node); | |
131 | |
132 // We are only interested in text field clicks. | |
133 if (GetTextWebInputElement(node).isNull()) | |
134 return; | |
135 | |
136 last_node_clicked_ = node; | |
137 was_focused_ = (node.document().focusedNode() == last_node_clicked_); | |
138 } | |
139 | |
140 void PageClickTracker::HandleTextFieldMaybeLosingFocus( | |
141 const WebNode& newly_clicked_node) { | |
142 if (DidSelectedTextFieldLoseFocus(newly_clicked_node)) | |
143 listener_->InputElementLostFocus(); | |
144 } | |
145 | |
146 } // namespace autofill | |
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