Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : #include <stdio.h>
22 : #include <stdlib.h>
23 : #include <string.h>
24 : #include <unistd.h>
25 :
26 : #include <X11/Xlib.h>
27 : #include <X11/Xutil.h>
28 : #include <X11/Xatom.h>
29 : #include "FWS.hxx"
30 :
31 : static Atom fwsIconAtom;
32 :
33 : static Atom FWS_CLIENT;
34 : static Atom FWS_COMM_WINDOW;
35 : static Atom FWS_PROTOCOLS;
36 : static Atom FWS_STACK_UNDER;
37 : static Atom FWS_PARK_ICONS;
38 : static Atom FWS_PASS_ALL_INPUT;
39 : static Atom FWS_PASSES_INPUT;
40 : static Atom FWS_HANDLES_FOCUS;
41 :
42 : static Atom FWS_REGISTER_WINDOW;
43 : static Atom FWS_STATE_CHANGE;
44 : static Atom FWS_UNSEEN_STATE;
45 : static Atom FWS_NORMAL_STATE;
46 : static Atom WM_PROTOCOLS;
47 : static Atom WM_CHANGE_STATE;
48 :
49 : static Bool fwsStackUnder;
50 : static Bool fwsParkIcons;
51 : static Bool fwsPassesInput;
52 : static Bool fwsHandlesFocus;
53 :
54 : static Window fwsCommWindow;
55 :
56 : /*************************************<->***********************************
57 : *
58 : * WMSupportsFWS() -
59 : *
60 : * Initialize our atoms and determine if the current window manager is
61 : * providing FWS extension support.
62 : *
63 : *************************************<->***********************************/
64 :
65 : Bool
66 0 : WMSupportsFWS (Display *display, int screen)
67 : {
68 : unsigned int i;
69 : Atom protocol;
70 : Atom propType;
71 : int propFormat;
72 : unsigned long propItems;
73 : unsigned long propBytesAfter;
74 : unsigned char *propData;
75 : char propName[64];
76 :
77 0 : FWS_CLIENT = XInternAtom(display, "_SUN_FWS_CLIENT", False);
78 0 : FWS_COMM_WINDOW = XInternAtom(display, "_SUN_FWS_COMM_WINDOW", False);
79 0 : FWS_PROTOCOLS = XInternAtom(display, "_SUN_FWS_PROTOCOLS", False);
80 0 : FWS_STACK_UNDER = XInternAtom(display, "_SUN_FWS_STACK_UNDER", False);
81 0 : FWS_PARK_ICONS = XInternAtom(display, "_SUN_FWS_PARK_ICONS", False);
82 0 : FWS_PASS_ALL_INPUT = XInternAtom(display, "_SUN_FWS_PASS_ALL_INPUT", False);
83 0 : FWS_PASSES_INPUT = XInternAtom(display, "_SUN_FWS_PASSES_INPUT", False);
84 0 : FWS_HANDLES_FOCUS = XInternAtom(display, "_SUN_FWS_HANDLES_FOCUS", False);
85 0 : FWS_REGISTER_WINDOW= XInternAtom(display, "_SUN_FWS_REGISTER_WINDOW",False);
86 0 : FWS_STATE_CHANGE = XInternAtom(display, "_SUN_FWS_STATE_CHANGE", False);
87 0 : FWS_UNSEEN_STATE = XInternAtom(display, "_SUN_FWS_UNSEEN_STATE", False);
88 0 : FWS_NORMAL_STATE = XInternAtom(display, "_SUN_FWS_NORMAL_STATE", False);
89 0 : WM_PROTOCOLS = XInternAtom(display, "WM_PROTOCOLS", False);
90 0 : WM_CHANGE_STATE = XInternAtom(display, "WM_CHANGE_STATE", False);
91 :
92 0 : snprintf (propName, sizeof(propName), "_SUN_FWS_NEXT_ICON_%d", screen);
93 0 : fwsIconAtom = XInternAtom(display, propName, False);
94 :
95 0 : if (XGetWindowProperty (display, DefaultRootWindow (display),
96 : FWS_COMM_WINDOW, 0, 1,
97 : False, AnyPropertyType, &propType,
98 : &propFormat, &propItems,
99 0 : &propBytesAfter, &propData) != Success)
100 0 : return False;
101 :
102 0 : if (propFormat != 32 ||
103 0 : propItems != 1 ||
104 0 : propBytesAfter != 0)
105 : {
106 : #if OSL_DEBUG_LEVEL > 1
107 : fprintf (stderr, "Bad FWS_COMM_WINDOW property on root window.\n");
108 : #endif
109 0 : XFree (propData);
110 0 : return False;
111 : }
112 :
113 0 : fwsCommWindow = *(Window *) propData;
114 : #if OSL_DEBUG_LEVEL > 1
115 : fprintf (stderr, "Using fwsCommWindow = 0x%lx.\n", fwsCommWindow);
116 : #endif
117 0 : XFree (propData);
118 :
119 :
120 0 : if (XGetWindowProperty (display, DefaultRootWindow (display),
121 : FWS_PROTOCOLS, 0, 10,
122 : False, AnyPropertyType, &propType,
123 : &propFormat, &propItems,
124 0 : &propBytesAfter, &propData) != Success)
125 : {
126 0 : return False;
127 : }
128 :
129 0 : if (propFormat != 32 ||
130 0 : propBytesAfter != 0)
131 : {
132 : #if OSL_DEBUG_LEVEL > 1
133 : fprintf (stderr, "Bad FWS_PROTOCOLS property on root window.\n");
134 : #endif
135 0 : XFree (propData);
136 0 : return False;
137 : }
138 :
139 0 : for (i = 0; i < propItems; ++i)
140 : {
141 0 : protocol = ((Atom *) propData)[i];
142 0 : if (protocol == FWS_STACK_UNDER)
143 : {
144 0 : fwsStackUnder = True;
145 : #if OSL_DEBUG_LEVEL > 1
146 : fprintf (stderr, "Using fwsStackUnder.\n");
147 : #endif
148 : }
149 : else
150 0 : if (protocol == FWS_PARK_ICONS)
151 : {
152 0 : fwsParkIcons = True;
153 : #if OSL_DEBUG_LEVEL > 1
154 : fprintf (stderr, "Using fwsParkIcons.\n");
155 : #endif
156 : }
157 : else
158 0 : if (protocol == FWS_PASSES_INPUT)
159 : {
160 0 : fwsPassesInput = True;
161 : #if OSL_DEBUG_LEVEL > 1
162 : fprintf (stderr, "Using fwsPassesInput.\n");
163 : #endif
164 : }
165 : else
166 0 : if (protocol == FWS_HANDLES_FOCUS)
167 : {
168 0 : fwsHandlesFocus = True;
169 : #if OSL_DEBUG_LEVEL > 1
170 : fprintf (stderr, "Using fwsHandlesFocus.\n");
171 : #endif
172 : }
173 : }
174 :
175 0 : XFree (propData);
176 0 : return True;
177 : }
178 :
179 : /*************************************<->***********************************
180 : *
181 : * newHandler() -
182 : *
183 : * Handle X errors (temporarily) to record the occurrence of BadWindow
184 : * errors without crashing. Used to detect the FWS_COMM_WINDOW root window
185 : * property containing an old or obsolete window id.
186 : *
187 : *************************************<->***********************************/
188 :
189 : extern "C" {
190 :
191 : static Bool badWindowFound;
192 : static int (* oldHandler) (Display *, XErrorEvent *);
193 :
194 : static int
195 0 : newHandler (Display *display, XErrorEvent *xerror)
196 : {
197 0 : if (xerror->error_code != BadWindow)
198 0 : (*oldHandler)(display, xerror);
199 : else
200 0 : badWindowFound = True;
201 :
202 0 : return 0;
203 : }
204 :
205 : }
206 :
207 : /*************************************<->***********************************
208 : *
209 : * RegisterFwsWindow() -
210 : *
211 : * Send a client message to the FWS_COMM_WINDOW indicating the existance
212 : * of a new FWS client window. Be careful to avoid BadWindow errors on
213 : * the XSendEvent in case the FWS_COMM_WINDOW root window property had
214 : * old/obsolete junk in it.
215 : *
216 : *************************************<->***********************************/
217 :
218 : Bool
219 0 : RegisterFwsWindow (Display *display, Window window)
220 : {
221 : XClientMessageEvent msg;
222 :
223 0 : msg.type = ClientMessage;
224 0 : msg.window = fwsCommWindow;
225 0 : msg.message_type = FWS_REGISTER_WINDOW;
226 0 : msg.format = 32;
227 0 : msg.data.l[0] = window;
228 :
229 0 : XSync (display, False);
230 0 : badWindowFound = False;
231 0 : oldHandler = XSetErrorHandler (newHandler);
232 :
233 : XSendEvent (display, fwsCommWindow, False, NoEventMask,
234 0 : (XEvent *) &msg);
235 0 : XSync (display, False);
236 :
237 0 : XSetErrorHandler (oldHandler);
238 : #if OSL_DEBUG_LEVEL > 1
239 : if (badWindowFound)
240 : fprintf (stderr, "No FWS client window to register with.\n");
241 : #endif
242 :
243 0 : return !badWindowFound;
244 : }
245 :
246 : /*************************************<->***********************************
247 : *
248 : * AddFwsProtocols -
249 : *
250 : * Add the FWS protocol atoms to the WMProtocols property for the window.
251 : *
252 : *************************************<->***********************************/
253 :
254 : void
255 0 : AddFwsProtocols (Display *display, Window window)
256 : {
257 : #define MAX_FWS_PROTOS 10
258 :
259 : Atom fwsProtocols[ MAX_FWS_PROTOS ];
260 0 : int nProtos = 0;
261 :
262 0 : fwsProtocols[ nProtos++ ] = FWS_CLIENT;
263 0 : fwsProtocols[ nProtos++ ] = FWS_STACK_UNDER;
264 0 : fwsProtocols[ nProtos++ ] = FWS_STATE_CHANGE;
265 0 : fwsProtocols[ nProtos++ ] = FWS_PASS_ALL_INPUT;
266 : XChangeProperty (display, window, WM_PROTOCOLS,
267 : XA_ATOM, 32, PropModeAppend,
268 0 : (unsigned char *) fwsProtocols, nProtos);
269 0 : }
270 :
271 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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