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 : #include <stdio.h>
21 : #include <stdlib.h>
22 : #include <string.h>
23 : #include <unistd.h>
24 :
25 : #include <X11/Xlib.h>
26 : #include <X11/Xutil.h>
27 : #include <X11/Xatom.h>
28 : #include "FWS.hxx"
29 :
30 : static Atom fwsIconAtom;
31 :
32 : static Atom FWS_CLIENT;
33 : static Atom FWS_COMM_WINDOW;
34 : static Atom FWS_PROTOCOLS;
35 : static Atom FWS_STACK_UNDER;
36 : static Atom FWS_PARK_ICONS;
37 : static Atom FWS_PASS_ALL_INPUT;
38 : static Atom FWS_PASSES_INPUT;
39 : static Atom FWS_HANDLES_FOCUS;
40 :
41 : static Atom FWS_REGISTER_WINDOW;
42 : static Atom FWS_STATE_CHANGE;
43 : static Atom FWS_UNSEEN_STATE;
44 : static Atom FWS_NORMAL_STATE;
45 : static Atom WM_PROTOCOLS;
46 : static Atom WM_CHANGE_STATE;
47 :
48 : static Bool fwsStackUnder;
49 : static Bool fwsParkIcons;
50 : static Bool fwsPassesInput;
51 : static Bool fwsHandlesFocus;
52 :
53 : static Window fwsCommWindow;
54 :
55 : /*************************************<->***********************************
56 : *
57 : * WMSupportsFWS() -
58 : *
59 : * Initialize our atoms and determine if the current window manager is
60 : * providing FWS extension support.
61 : *
62 : *************************************<->***********************************/
63 :
64 : Bool
65 0 : WMSupportsFWS (Display *display, int screen)
66 : {
67 : unsigned int i;
68 : Atom protocol;
69 : Atom propType;
70 : int propFormat;
71 : unsigned long propItems;
72 : unsigned long propBytesAfter;
73 : unsigned char *propData;
74 : char propName[64];
75 :
76 0 : FWS_CLIENT = XInternAtom(display, "_SUN_FWS_CLIENT", False);
77 0 : FWS_COMM_WINDOW = XInternAtom(display, "_SUN_FWS_COMM_WINDOW", False);
78 0 : FWS_PROTOCOLS = XInternAtom(display, "_SUN_FWS_PROTOCOLS", False);
79 0 : FWS_STACK_UNDER = XInternAtom(display, "_SUN_FWS_STACK_UNDER", False);
80 0 : FWS_PARK_ICONS = XInternAtom(display, "_SUN_FWS_PARK_ICONS", False);
81 0 : FWS_PASS_ALL_INPUT = XInternAtom(display, "_SUN_FWS_PASS_ALL_INPUT", False);
82 0 : FWS_PASSES_INPUT = XInternAtom(display, "_SUN_FWS_PASSES_INPUT", False);
83 0 : FWS_HANDLES_FOCUS = XInternAtom(display, "_SUN_FWS_HANDLES_FOCUS", False);
84 0 : FWS_REGISTER_WINDOW= XInternAtom(display, "_SUN_FWS_REGISTER_WINDOW",False);
85 0 : FWS_STATE_CHANGE = XInternAtom(display, "_SUN_FWS_STATE_CHANGE", False);
86 0 : FWS_UNSEEN_STATE = XInternAtom(display, "_SUN_FWS_UNSEEN_STATE", False);
87 0 : FWS_NORMAL_STATE = XInternAtom(display, "_SUN_FWS_NORMAL_STATE", False);
88 0 : WM_PROTOCOLS = XInternAtom(display, "WM_PROTOCOLS", False);
89 0 : WM_CHANGE_STATE = XInternAtom(display, "WM_CHANGE_STATE", False);
90 :
91 0 : snprintf (propName, sizeof(propName), "_SUN_FWS_NEXT_ICON_%d", screen);
92 0 : fwsIconAtom = XInternAtom(display, propName, False);
93 :
94 0 : if (XGetWindowProperty (display, DefaultRootWindow (display),
95 : FWS_COMM_WINDOW, 0, 1,
96 : False, AnyPropertyType, &propType,
97 : &propFormat, &propItems,
98 0 : &propBytesAfter, &propData) != Success)
99 0 : return False;
100 :
101 0 : if (propFormat != 32 ||
102 0 : propItems != 1 ||
103 0 : propBytesAfter != 0)
104 : {
105 : #if OSL_DEBUG_LEVEL > 1
106 : fprintf (stderr, "Bad FWS_COMM_WINDOW property on root window.\n");
107 : #endif
108 0 : XFree (propData);
109 0 : return False;
110 : }
111 :
112 0 : fwsCommWindow = *(Window *) propData;
113 : #if OSL_DEBUG_LEVEL > 1
114 : fprintf (stderr, "Using fwsCommWindow = 0x%lx.\n", fwsCommWindow);
115 : #endif
116 0 : XFree (propData);
117 :
118 0 : if (XGetWindowProperty (display, DefaultRootWindow (display),
119 : FWS_PROTOCOLS, 0, 10,
120 : False, AnyPropertyType, &propType,
121 : &propFormat, &propItems,
122 0 : &propBytesAfter, &propData) != Success)
123 : {
124 0 : return False;
125 : }
126 :
127 0 : if (propFormat != 32 ||
128 0 : propBytesAfter != 0)
129 : {
130 : #if OSL_DEBUG_LEVEL > 1
131 : fprintf (stderr, "Bad FWS_PROTOCOLS property on root window.\n");
132 : #endif
133 0 : XFree (propData);
134 0 : return False;
135 : }
136 :
137 0 : for (i = 0; i < propItems; ++i)
138 : {
139 0 : protocol = ((Atom *) propData)[i];
140 0 : if (protocol == FWS_STACK_UNDER)
141 : {
142 0 : fwsStackUnder = True;
143 : #if OSL_DEBUG_LEVEL > 1
144 : fprintf (stderr, "Using fwsStackUnder.\n");
145 : #endif
146 : }
147 : else
148 0 : if (protocol == FWS_PARK_ICONS)
149 : {
150 0 : fwsParkIcons = True;
151 : #if OSL_DEBUG_LEVEL > 1
152 : fprintf (stderr, "Using fwsParkIcons.\n");
153 : #endif
154 : }
155 : else
156 0 : if (protocol == FWS_PASSES_INPUT)
157 : {
158 0 : fwsPassesInput = True;
159 : #if OSL_DEBUG_LEVEL > 1
160 : fprintf (stderr, "Using fwsPassesInput.\n");
161 : #endif
162 : }
163 : else
164 0 : if (protocol == FWS_HANDLES_FOCUS)
165 : {
166 0 : fwsHandlesFocus = True;
167 : #if OSL_DEBUG_LEVEL > 1
168 : fprintf (stderr, "Using fwsHandlesFocus.\n");
169 : #endif
170 : }
171 : }
172 :
173 0 : XFree (propData);
174 0 : return True;
175 : }
176 :
177 : /*************************************<->***********************************
178 : *
179 : * newHandler() -
180 : *
181 : * Handle X errors (temporarily) to record the occurrence of BadWindow
182 : * errors without crashing. Used to detect the FWS_COMM_WINDOW root window
183 : * property containing an old or obsolete window id.
184 : *
185 : *************************************<->***********************************/
186 :
187 : extern "C" {
188 :
189 : static Bool badWindowFound;
190 : static int (* oldHandler) (Display *, XErrorEvent *);
191 :
192 : static int
193 0 : newHandler (Display *display, XErrorEvent *xerror)
194 : {
195 0 : if (xerror->error_code != BadWindow)
196 0 : (*oldHandler)(display, xerror);
197 : else
198 0 : badWindowFound = True;
199 :
200 0 : return 0;
201 : }
202 :
203 : }
204 :
205 : /*************************************<->***********************************
206 : *
207 : * RegisterFwsWindow() -
208 : *
209 : * Send a client message to the FWS_COMM_WINDOW indicating the existance
210 : * of a new FWS client window. Be careful to avoid BadWindow errors on
211 : * the XSendEvent in case the FWS_COMM_WINDOW root window property had
212 : * old/obsolete junk in it.
213 : *
214 : *************************************<->***********************************/
215 :
216 : Bool
217 0 : RegisterFwsWindow (Display *display, Window window)
218 : {
219 : XClientMessageEvent msg;
220 :
221 0 : msg.type = ClientMessage;
222 0 : msg.window = fwsCommWindow;
223 0 : msg.message_type = FWS_REGISTER_WINDOW;
224 0 : msg.format = 32;
225 0 : msg.data.l[0] = window;
226 :
227 0 : XSync (display, False);
228 0 : badWindowFound = False;
229 0 : oldHandler = XSetErrorHandler (newHandler);
230 :
231 : XSendEvent (display, fwsCommWindow, False, NoEventMask,
232 0 : (XEvent *) &msg);
233 0 : XSync (display, False);
234 :
235 0 : XSetErrorHandler (oldHandler);
236 : #if OSL_DEBUG_LEVEL > 1
237 : if (badWindowFound)
238 : fprintf (stderr, "No FWS client window to register with.\n");
239 : #endif
240 :
241 0 : return !badWindowFound;
242 : }
243 :
244 : /*************************************<->***********************************
245 : *
246 : * AddFwsProtocols -
247 : *
248 : * Add the FWS protocol atoms to the WMProtocols property for the window.
249 : *
250 : *************************************<->***********************************/
251 :
252 : void
253 0 : AddFwsProtocols (Display *display, Window window)
254 : {
255 : #define MAX_FWS_PROTOS 10
256 :
257 : Atom fwsProtocols[ MAX_FWS_PROTOS ];
258 0 : int nProtos = 0;
259 :
260 0 : fwsProtocols[ nProtos++ ] = FWS_CLIENT;
261 0 : fwsProtocols[ nProtos++ ] = FWS_STACK_UNDER;
262 0 : fwsProtocols[ nProtos++ ] = FWS_STATE_CHANGE;
263 0 : fwsProtocols[ nProtos++ ] = FWS_PASS_ALL_INPUT;
264 : XChangeProperty (display, window, WM_PROTOCOLS,
265 : XA_ATOM, 32, PropModeAppend,
266 0 : (unsigned char *) fwsProtocols, nProtos);
267 0 : }
268 :
269 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
