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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_BROWSER_CHROMEOS_LEGACY_WINDOW_MANAGER_WM_IPC_H_ | |
6 #define CHROME_BROWSER_CHROMEOS_LEGACY_WINDOW_MANAGER_WM_IPC_H_ | |
7 #pragma once | |
8 | |
9 #include <gtk/gtk.h> | |
10 #include <map> | |
11 #include <set> | |
12 #include <string> | |
13 #include <vector> | |
14 | |
15 #include "base/logging.h" | |
16 #include "third_party/cros_system_api/window_manager/chromeos_wm_ipc_enums.h" | |
17 | |
18 typedef unsigned long Atom; | |
19 typedef unsigned long XID; | |
20 | |
21 namespace base { | |
22 template <typename T> struct DefaultLazyInstanceTraits; | |
23 } | |
24 namespace gfx { | |
25 class Rect; | |
26 } | |
27 | |
28 namespace chromeos { | |
29 | |
30 class WmIpc { | |
31 public: | |
32 enum AtomType { | |
33 ATOM_CHROME_LAYOUT_MODE = 0, | |
34 ATOM_CHROME_LOGGED_IN, | |
35 ATOM_CHROME_STATE, | |
36 ATOM_CHROME_STATE_COLLAPSED_PANEL, | |
37 ATOM_CHROME_STATE_STATUS_HIDDEN, | |
38 ATOM_CHROME_STATUS_BOUNDS, | |
39 ATOM_CHROME_WINDOW_TYPE, | |
40 ATOM_CHROME_WM_MESSAGE, | |
41 ATOM_MANAGER, | |
42 ATOM_STRING, | |
43 ATOM_UTF8_STRING, | |
44 ATOM_WM_S0, | |
45 kNumAtoms, | |
46 }; | |
47 | |
48 struct Message { | |
49 public: | |
50 Message() { | |
51 Init(WM_IPC_MESSAGE_UNKNOWN); | |
52 } | |
53 // WmIpcMessageType is defined in chromeos_wm_ipc_enums.h. | |
54 explicit Message(WmIpcMessageType type) { | |
55 Init(type); | |
56 } | |
57 | |
58 WmIpcMessageType type() const { return type_; } | |
59 void set_type(WmIpcMessageType type) { type_ = type; } | |
60 | |
61 inline int max_params() const { | |
62 return arraysize(params_); | |
63 } | |
64 long param(int index) const { | |
65 DCHECK_GE(index, 0); | |
66 DCHECK_LT(index, max_params()); | |
67 return params_[index]; | |
68 } | |
69 void set_param(int index, long value) { | |
70 DCHECK_GE(index, 0); | |
71 DCHECK_LT(index, max_params()); | |
72 params_[index] = value; | |
73 } | |
74 | |
75 private: | |
76 // Common initialization code shared between constructors. | |
77 void Init(WmIpcMessageType type) { | |
78 set_type(type); | |
79 for (int i = 0; i < max_params(); ++i) { | |
80 set_param(i, 0); | |
81 } | |
82 } | |
83 | |
84 // Type of message that was sent. | |
85 WmIpcMessageType type_; | |
86 | |
87 // Type-specific data. This is bounded by the number of 32-bit values | |
88 // that we can pack into a ClientMessageEvent -- it holds five, but we | |
89 // use the first one to store the message type. | |
90 long params_[4]; | |
91 }; | |
92 | |
93 // Returns the single instance of WmIpc. | |
94 static WmIpc* instance(); | |
95 | |
96 WmIpcLayoutMode layout_mode() const { return layout_mode_; } | |
97 | |
98 // Gets or sets a property describing a window's type. | |
99 // WmIpcMessageType is defined in chromeos_wm_ipc_enums.h. Type-specific | |
100 // parameters may also be supplied. The caller is responsible for trapping | |
101 // errors from the X server. | |
102 bool SetWindowType(GtkWidget* widget, | |
103 WmIpcWindowType type, | |
104 const std::vector<int>* params); | |
105 | |
106 // Gets the string name of an atom from the AtomType enum. | |
107 std::string GetAtomName(AtomType type) const; | |
108 | |
109 // Gets the type of the window, and any associated parameters. The | |
110 // caller is responsible for trapping errors from the X server. If | |
111 // the parameters are not interesting to the caller, NULL may be | |
112 // passed for |params|. | |
113 WmIpcWindowType GetWindowType(GtkWidget* widget, std::vector<int>* params); | |
114 | |
115 // Gets the set of atoms contained in a window's _CHROME_STATE property. | |
116 // Returns false if the property isn't set. | |
117 bool GetWindowState(GtkWidget* widget, std::set<AtomType>* atom_types); | |
118 | |
119 // Sends a message to the WM. | |
120 void SendMessage(const Message& msg); | |
121 | |
122 // If |event| is a valid Message it is decoded into |msg| and true is | |
123 // returned. If false is returned, |event| is not a valid Message. | |
124 bool DecodeMessage(const GdkEventClient& event, Message* msg); | |
125 | |
126 // Handles ClientMessage events that weren't decodable using DecodeMessage(). | |
127 // Specifically, this catches messages about the WM_S0 selection that get sent | |
128 // when a window manager process starts (so that we can re-run InitWmInfo()). | |
129 // See ICCCM 2.8 for more info about MANAGER selections. | |
130 void HandleNonChromeClientMessageEvent(const GdkEventClient& event); | |
131 | |
132 // Handle an event reporting a property change on the root window. | |
133 void HandleRootWindowPropertyEvent(const GdkEventProperty& event); | |
134 | |
135 // Sets a _CHROME_LOGGED_IN property on the root window describing whether | |
136 // the user is currently logged in or not. | |
137 void SetLoggedInProperty(bool logged_in); | |
138 | |
139 // Sets a _CHROME_STATUS_BOUNDS property on toplevel window |widget| | |
140 // describing the status area's bounds within the window. | |
141 void SetStatusBoundsProperty(GtkWidget* widget, const gfx::Rect& bounds); | |
142 | |
143 // Sends a message to the window manager notifying it that we're signing out. | |
144 void NotifyAboutSignout(); | |
145 | |
146 private: | |
147 friend struct base::DefaultLazyInstanceTraits<WmIpc>; | |
148 | |
149 WmIpc(); | |
150 ~WmIpc(); | |
151 | |
152 // Initializes 'wm_' and sends the window manager a message telling it the | |
153 // version of the IPC protocol that we support. This is called in our | |
154 // constructor, but needs to be re-run if the window manager gets restarted. | |
155 void InitWmInfo(); | |
156 | |
157 // Updates |layout_mode_| based on the current value of the root window's | |
158 // _CHROME_LAYOUT_MODE property. | |
159 void FetchLayoutModeProperty(); | |
160 | |
161 // Maps between our Atom enum and the X server's atom IDs and from the | |
162 // server's IDs to atoms' string names. | |
163 std::map<AtomType, Atom> type_to_atom_; | |
164 std::map<Atom, AtomType> atom_to_type_; | |
165 std::map<Atom, std::string> atom_to_string_; | |
166 | |
167 // Cached value of type_to_atom_[ATOM_CHROME_WM_MESSAGE]. | |
168 Atom wm_message_atom_; | |
169 | |
170 // Handle to the WM. Used for sending messages. | |
171 XID wm_; | |
172 | |
173 // The current value of the root window's _CHROME_LAYOUT_MODE property. | |
174 WmIpcLayoutMode layout_mode_; | |
175 | |
176 DISALLOW_COPY_AND_ASSIGN(WmIpc); | |
177 }; | |
178 | |
179 } // namespace chromeos | |
180 | |
181 #endif // CHROME_BROWSER_CHROMEOS_LEGACY_WINDOW_MANAGER_WM_IPC_H_ | |
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