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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 "chrome/browser/ui/gtk/tabs/window_finder.h" | |
6 | |
7 #include <gtk/gtk.h> | |
8 | |
9 #include "base/logging.h" | |
10 #include "chrome/browser/ui/browser_list.h" | |
11 #include "chrome/browser/ui/browser_window.h" | |
12 #include "chrome/browser/ui/gtk/browser_window_gtk.h" | |
13 #include "chrome/browser/ui/gtk/gtk_util.h" | |
14 #include "chrome/browser/ui/gtk/tabs/tab_gtk.h" | |
15 #include "chrome/browser/ui/host_desktop.h" | |
16 #include "ui/base/x/x11_util.h" | |
17 #include "ui/gfx/native_widget_types.h" | |
18 | |
19 namespace { | |
20 | |
21 //////////////////////////////////////////////////////////////////////////////// | |
22 // BaseWindowFinder | |
23 // | |
24 // Base class used to locate a window. A subclass need only override | |
25 // ShouldStopIterating to determine when iteration should stop. | |
26 class BaseWindowFinder : public ui::EnumerateWindowsDelegate { | |
27 public: | |
28 explicit BaseWindowFinder(const std::set<GtkWidget*>& ignore) { | |
29 std::set<GtkWidget*>::iterator iter; | |
30 for (iter = ignore.begin(); iter != ignore.end(); iter++) { | |
31 XID xid = ui::GetX11WindowFromGtkWidget(*iter); | |
32 ignore_.insert(xid); | |
33 } | |
34 } | |
35 | |
36 virtual ~BaseWindowFinder() {} | |
37 | |
38 protected: | |
39 // Returns true if |window| is in the ignore list. | |
40 bool ShouldIgnoreWindow(XID window) { | |
41 return (ignore_.find(window) != ignore_.end()); | |
42 } | |
43 | |
44 // Returns true if iteration should stop, false otherwise. | |
45 virtual bool ShouldStopIterating(XID window) OVERRIDE { | |
46 return false; | |
47 } | |
48 | |
49 private: | |
50 std::set<XID> ignore_; | |
51 | |
52 DISALLOW_COPY_AND_ASSIGN(BaseWindowFinder); | |
53 }; | |
54 | |
55 //////////////////////////////////////////////////////////////////////////////// | |
56 // TopMostFinder | |
57 // | |
58 // Helper class to determine if a particular point of a window is not obscured | |
59 // by another window. | |
60 class TopMostFinder : public BaseWindowFinder { | |
61 public: | |
62 // Returns true if |window| is not obscured by another window at the | |
63 // location |screen_loc|, not including the windows in |ignore|. | |
64 static bool IsTopMostWindowAtPoint(XID window, | |
65 const gfx::Point& screen_loc, | |
66 const std::set<GtkWidget*>& ignore) { | |
67 TopMostFinder finder(window, screen_loc, ignore); | |
68 return finder.is_top_most_; | |
69 } | |
70 | |
71 protected: | |
72 virtual bool ShouldStopIterating(XID window) OVERRIDE { | |
73 if (BaseWindowFinder::ShouldIgnoreWindow(window)) | |
74 return false; | |
75 | |
76 if (window == target_) { | |
77 // Window is topmost, stop iterating. | |
78 is_top_most_ = true; | |
79 return true; | |
80 } | |
81 | |
82 if (!ui::IsWindowVisible(window)) { | |
83 // The window isn't visible, keep iterating. | |
84 return false; | |
85 } | |
86 | |
87 if (ui::WindowContainsPoint(window, screen_loc_)) | |
88 return true; | |
89 | |
90 return false; | |
91 } | |
92 | |
93 private: | |
94 TopMostFinder(XID window, | |
95 const gfx::Point& screen_loc, | |
96 const std::set<GtkWidget*>& ignore) | |
97 : BaseWindowFinder(ignore), | |
98 target_(window), | |
99 screen_loc_(screen_loc), | |
100 is_top_most_(false) { | |
101 ui::EnumerateTopLevelWindows(this); | |
102 } | |
103 | |
104 // The window we're looking for. | |
105 XID target_; | |
106 | |
107 // Location of window to find. | |
108 gfx::Point screen_loc_; | |
109 | |
110 // Is target_ the top most window? This is initially false but set to true | |
111 // in ShouldStopIterating if target_ is passed in. | |
112 bool is_top_most_; | |
113 | |
114 DISALLOW_COPY_AND_ASSIGN(TopMostFinder); | |
115 }; | |
116 | |
117 //////////////////////////////////////////////////////////////////////////////// | |
118 // LocalProcessWindowFinder | |
119 // | |
120 // Helper class to determine if a particular point of a window from our process | |
121 // is not obscured by another window. | |
122 class LocalProcessWindowFinder : public BaseWindowFinder { | |
123 public: | |
124 // Returns the XID from our process at screen_loc that is not obscured by | |
125 // another window. Returns 0 otherwise. | |
126 static XID GetProcessWindowAtPoint(const gfx::Point& screen_loc, | |
127 const std::set<GtkWidget*>& ignore) { | |
128 LocalProcessWindowFinder finder(screen_loc, ignore); | |
129 if (finder.result_ && | |
130 TopMostFinder::IsTopMostWindowAtPoint(finder.result_, screen_loc, | |
131 ignore)) { | |
132 return finder.result_; | |
133 } | |
134 return 0; | |
135 } | |
136 | |
137 protected: | |
138 virtual bool ShouldStopIterating(XID window) OVERRIDE { | |
139 if (BaseWindowFinder::ShouldIgnoreWindow(window)) | |
140 return false; | |
141 | |
142 // Check if this window is in our process. | |
143 if (!BrowserWindowGtk::GetBrowserWindowForXID(window)) | |
144 return false; | |
145 | |
146 if (!ui::IsWindowVisible(window)) | |
147 return false; | |
148 | |
149 if (ui::WindowContainsPoint(window, screen_loc_)) { | |
150 result_ = window; | |
151 return true; | |
152 } | |
153 | |
154 return false; | |
155 } | |
156 | |
157 private: | |
158 LocalProcessWindowFinder(const gfx::Point& screen_loc, | |
159 const std::set<GtkWidget*>& ignore) | |
160 : BaseWindowFinder(ignore), | |
161 screen_loc_(screen_loc), | |
162 result_(0) { | |
163 ui::EnumerateTopLevelWindows(this); | |
164 } | |
165 | |
166 // Position of the mouse. | |
167 gfx::Point screen_loc_; | |
168 | |
169 // The resulting window. This is initially null but set to true in | |
170 // ShouldStopIterating if an appropriate window is found. | |
171 XID result_; | |
172 | |
173 DISALLOW_COPY_AND_ASSIGN(LocalProcessWindowFinder); | |
174 }; | |
175 | |
176 } // namespace | |
177 | |
178 GtkWindow* GetLocalProcessWindowAtPoint( | |
179 const gfx::Point& screen_point, | |
180 const std::set<GtkWidget*>& ignore) { | |
181 XID xid = | |
182 LocalProcessWindowFinder::GetProcessWindowAtPoint(screen_point, ignore); | |
183 return BrowserWindowGtk::GetBrowserWindowForXID(xid); | |
184 } | |
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