1 /* $Id$ */
2 /* Copyright (c) 2011-2016 Pierre Pronchery <khorben@defora.org> */
3 /* This file is part of DeforaOS Desktop libDesktop */
4 /* All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
18 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
28 /* TODO:
29 * - proxy for the libApp framework instead */
30
31
32
33 #include <stdlib.h>
34 #ifdef DEBUG
35 # include <stdio.h>
36 #endif
37 #include <string.h>
38 #include <errno.h>
39 #include <gtk/gtk.h>
40 #if GTK_CHECK_VERSION(3, 0, 0)
41 # include <gtk/gtkx.h>
42 #else
43 # include <gdk/gdkx.h>
44 #endif
45 #include <System.h>
46 #include "Desktop.h"
47
48
49 /* Message */
50 /* private */
51 /* types */
52 typedef struct _MessageCallback
53 {
54 GtkWidget * window;
55 #if GTK_CHECK_VERSION(3, 0, 0)
56 Atom atom;
57 #else
58 GtkWidget * widget;
59 Window xwindow;
60 #endif
61 DesktopMessageCallback callback;
62 void * data;
63 } MessageCallback;
64
65
66 /* variables */
67 static MessageCallback ** _callbacks = NULL;
68 static size_t _callbacks_cnt = 0;
69
70
71 /* prototypes */
72 /* callbacks */
73 static GdkFilterReturn _desktop_message_on_callback(GdkXEvent * xevent,
74 GdkEvent * event, gpointer data);
75
76
77 /* public */
78 /* functions */
79 /* desktop_message_register */
desktop_message_register(GtkWidget * window,char const * destination,DesktopMessageCallback callback,void * data)80 int desktop_message_register(GtkWidget * window, char const * destination,
81 DesktopMessageCallback callback, void * data)
82 {
83 MessageCallback ** p;
84 MessageCallback * mc;
85 GdkWindow * gwindow;
86 #if !GTK_CHECK_VERSION(3, 0, 0)
87 GdkAtom atom;
88 #endif
89
90 #ifdef DEBUG
91 fprintf(stderr, "DEBUG: %s(%p, \"%s\", %p, %p)\n", __func__, window,
92 destination, callback, data);
93 #endif
94 if((p = realloc(_callbacks, sizeof(*p) * (_callbacks_cnt + 1))) == NULL)
95 return -1;
96 _callbacks = p;
97 if((mc = object_new(sizeof(*mc))) == NULL)
98 return -1;
99 _callbacks[_callbacks_cnt++] = mc;
100 mc->callback = callback;
101 mc->data = data;
102 #if GTK_CHECK_VERSION(3, 0, 0)
103 mc->atom = XInternAtom(gdk_x11_get_default_xdisplay(), destination,
104 FALSE);
105 gwindow = (window != NULL) ? gtk_widget_get_window(window) : NULL;
106 gdk_window_add_filter(gwindow, _desktop_message_on_callback, mc);
107 #else
108 if((mc->window = window) == NULL)
109 {
110 mc->widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
111 gtk_widget_realize(mc->widget);
112 }
113 else
114 mc->widget = window;
115 gwindow = gtk_widget_get_window(mc->widget);
116 mc->xwindow = GDK_WINDOW_XWINDOW(gwindow);
117 atom = gdk_atom_intern(destination, FALSE);
118 gdk_add_client_message_filter(atom, _desktop_message_on_callback, mc);
119 #endif
120 return 0;
121 }
122
123
124 /* desktop_message_send */
desktop_message_send(char const * destination,uint32_t value1,uint32_t value2,uint32_t value3)125 int desktop_message_send(char const * destination, uint32_t value1,
126 uint32_t value2, uint32_t value3)
127 {
128 #if GTK_CHECK_VERSION(3, 0, 0)
129 XEvent xev;
130 XClientMessageEvent * xcme = &xev.xclient;
131
132 memset(&xev, 0, sizeof(xev));
133 xev.type = ClientMessage;
134 xcme->serial = 0;
135 xcme->send_event = True;
136 xcme->message_type = XInternAtom(gdk_x11_get_default_xdisplay(),
137 destination, FALSE);
138 xcme->format = 32;
139 xcme->data.l[0] = value1;
140 xcme->data.l[1] = value2;
141 xcme->data.l[2] = value3;
142 gdk_error_trap_push();
143 XSendEvent(gdk_x11_get_default_xdisplay(),
144 gdk_x11_get_default_root_xwindow(), False,
145 StructureNotifyMask | /* FIXME check the mask */
146 SubstructureNotifyMask | SubstructureRedirectMask,
147 &xev);
148 return (gdk_error_trap_pop() == 0) ? 0 : -1;
149 #else
150 GdkAtom atom;
151 GdkEvent event;
152 GdkEventClient * client = &event.client;
153
154 atom = gdk_atom_intern(destination, FALSE);
155 memset(&event, 0, sizeof(event));
156 client->type = GDK_CLIENT_EVENT;
157 client->window = NULL;
158 client->send_event = TRUE;
159 client->message_type = atom;
160 client->data_format = 32;
161 client->data.l[0] = value1;
162 client->data.l[1] = value2;
163 client->data.l[2] = value3;
164 gdk_event_send_clientmessage_toall(&event);
165 return 0;
166 #endif
167 }
168
169
170 /* desktop_message_unregister */
desktop_message_unregister(GtkWidget * window,DesktopMessageCallback callback,void * data)171 void desktop_message_unregister(GtkWidget * window,
172 DesktopMessageCallback callback, void * data)
173 {
174 size_t i;
175 MessageCallback ** p;
176 MessageCallback * mc;
177 GdkWindow * w;
178
179 # ifdef DEBUG
180 fprintf(stderr, "DEBUG: %s(%p, %p)\n", __func__, callback, data);
181 # endif
182 for(i = 0; i < _callbacks_cnt; i++)
183 {
184 mc = _callbacks[i];
185 if(mc->window == window
186 && mc->callback == callback
187 && mc->data == data)
188 break;
189 }
190 if(i == _callbacks_cnt)
191 return;
192 #if GTK_CHECK_VERSION(3, 0, 0)
193 w = (window != NULL) ? gtk_widget_get_window(window) : NULL;
194 #else
195 w = gtk_widget_get_window(mc->widget);
196 #endif
197 gdk_window_remove_filter(w, _desktop_message_on_callback, mc);
198 #if !GTK_CHECK_VERSION(3, 0, 0)
199 if(mc->window == NULL)
200 gtk_widget_destroy(mc->widget);
201 #endif
202 object_delete(mc);
203 p = &_callbacks[i];
204 memmove(p, p + 1, sizeof(*p) * (_callbacks_cnt - i - 1));
205 if((p = realloc(_callbacks, sizeof(*p) * (--_callbacks_cnt))) != NULL
206 || _callbacks_cnt == 0)
207 _callbacks = p;
208 }
209
210
211 /* private */
212 /* callbacks */
213 /* desktop_message_on_callback */
_desktop_message_on_callback(GdkXEvent * xevent,GdkEvent * event,gpointer data)214 static GdkFilterReturn _desktop_message_on_callback(GdkXEvent * xevent,
215 GdkEvent * event, gpointer data)
216 {
217 MessageCallback * mc = data;
218 XEvent * xev = xevent;
219 XClientMessageEvent * xcme;
220 uint32_t value1;
221 uint32_t value2;
222 uint32_t value3;
223 (void) event;
224
225 if(xev->type != ClientMessage)
226 return GDK_FILTER_CONTINUE;
227 xcme = &xev->xclient;
228 #if GTK_CHECK_VERSION(3, 0, 0)
229 # ifdef DEBUG
230 fprintf(stderr, "DEBUG: %s(%lu %lu %p)\n", __func__, xcme->serial,
231 xcme->window, (void *)mc);
232 # endif
233 if(mc->atom != xcme->message_type)
234 return GDK_FILTER_CONTINUE;
235 #else
236 # ifdef DEBUG
237 fprintf(stderr, "DEBUG: %s(%lu %lu %p) %lu\n", __func__, xcme->serial,
238 xcme->window, mc, (void *)mc->xwindow);
239 # endif
240 if(mc->xwindow != xcme->window)
241 return GDK_FILTER_CONTINUE;
242 #endif
243 #ifdef DEBUG
244 fprintf(stderr, "DEBUG: %s() %p(%p)\n", __func__, (void *)mc->callback,
245 (void *)mc->data);
246 #endif
247 value1 = xcme->data.l[0];
248 value2 = xcme->data.l[1];
249 value3 = xcme->data.l[2];
250 if(mc->callback(mc->data, value1, value2, value3) == 0)
251 return GDK_FILTER_CONTINUE;
252 desktop_message_unregister(mc->window, mc->callback, mc->data);
253 return GDK_FILTER_REMOVE;
254 }
255