1 /* gcc -o pager pager.c -lX11 -lXmu -ldockapp */
6 #define DOCKAPP_SIZE 56
12 static GC dockapp_border1GC, dockapp_border2GC, window_border1GC, window_border2GC, active_desktopGC, inactive_desktopGC, active_windowGC, inactive_windowGC;
13 static Atom supported_atom, num_desktops_atom, desktop_geometry_atom, current_desktop_atom, client_list_atom, client_desktop_atom, client_state_atom, active_window_atom, moveresize_window_atom;
14 static Atom shaded_state, skip_pager_state, hidden_state;
15 static int desktop = -1;
16 static Window drag_window;
17 static int drag_x, drag_y;
18 static int drag_button;
19 static int dockapp_x, dockapp_y;
20 static unsigned int dockapp_width, dockapp_height, dockapp_border, dockapp_depth;
21 static double aspect, scale;
23 static int desktop_geometry_supported;
24 static int current_desktop_supported;
25 static int client_list_supported;
26 static int active_window_supported;
27 static int moveresize_supported;
34 int error_handler(Display *display, XErrorEvent *event) {
37 switch (event->error_code) {
39 /* The window may have gone away since we queried the window manager. */
43 if (XGetErrorText(display, event->error_code, buffer, sizeof(buffer))) {
44 fprintf(stderr, "%s\n", buffer);
53 void setup_atom(Atom *atom, const char *prop) {
54 *atom = XInternAtom(DADisplay, prop, True);
55 if (*atom != None) return;
56 fprintf(stderr, "Unknown atom %s!\n", prop);
60 void get_atom_longs(Atom atom, Atom type, Window window, long **data, unsigned long *num_items) {
63 unsigned long num_bytes;
65 XGetWindowProperty(DADisplay, window, atom, 0, 8192, False, type, &actual, &format, num_items, &num_bytes, (unsigned char **) data);
68 long get_atom_long(Atom atom, Atom type, Window window) {
71 unsigned long num_items;
73 get_atom_longs(atom, type, window, &data, &num_items);
74 if (num_items) ret = data[0];
80 void check_support() {
82 unsigned long i, num_items;
84 get_atom_longs(supported_atom, XA_ATOM, DefaultRootWindow(DADisplay), &data, &num_items);
85 for (i = 0; i < num_items; i++) {
86 if (data[i] == desktop_geometry_atom) desktop_geometry_supported = 1;
87 if (data[i] == current_desktop_atom) current_desktop_supported = 1;
88 if (data[i] == client_list_atom) client_list_supported = 1;
89 if (data[i] == active_window_atom) active_window_supported = 1;
90 if (data[i] == moveresize_window_atom) moveresize_supported = 1;
96 void enumerate_clients(client_t ***clients, unsigned long *num_clients, unsigned long *active_desktop, unsigned long *active_window) {
97 Window root, qroot, qparent, dockapp_root, child, *wins, client;
99 unsigned int width, height, border, depth;
100 unsigned int root_width, root_height;
103 unsigned long i, j, num_states;
107 if (desktop_geometry_supported) {
108 get_atom_longs(desktop_geometry_atom, XA_CARDINAL, DefaultRootWindow(DADisplay), &states, &num_states);
109 root_width = states[0];
110 root_height = states[1];
114 root_width = DisplayWidth(DADisplay, DefaultScreen(DADisplay));
115 root_height = DisplayWidth(DADisplay, DefaultScreen(DADisplay));
118 XGetGeometry(DADisplay, DAWindow, &dockapp_root, &dockapp_x, &dockapp_y, &dockapp_width, &dockapp_height, &dockapp_border, &dockapp_depth);
119 scale = (double) root_width / (double) dockapp_width;
120 aspect = (double) root_height / (double) dockapp_height;
122 *active_window = get_atom_long(active_window_atom, XA_WINDOW, dockapp_root);
123 *active_desktop = get_atom_long(current_desktop_atom, XA_CARDINAL, DefaultRootWindow(DADisplay));
125 if (client_list_supported) {
126 get_atom_longs(client_list_atom, XA_WINDOW, dockapp_root, &data, num_clients);
129 XQueryTree(DADisplay, dockapp_root, &qroot, &qparent, &wins, (unsigned int *) num_clients);
132 *clients = (client_t **) malloc(sizeof(client_t *) * *num_clients);
134 fprintf(stderr, "Out of memory for clients!\n");
138 for (i = 0; i < *num_clients; i++) {
139 (*clients)[i] = (client_t *) malloc(sizeof(client_t));
140 if (! (*clients)[i]) {
141 fprintf(stderr, "Out of memory for client!\n");
144 (*clients)[i]->window = 0;
146 if (client_list_supported) client = data[i];
147 else client = XmuClientWindow(DADisplay, wins[i]);
149 /* Don't page the pager. */
150 if (client == DAWindow) continue;
152 /* Check the window is on our desktop (or all desktops). */
153 client_desktop = get_atom_long(client_desktop_atom, XA_CARDINAL, client);
155 if (client_desktop != desktop && client_desktop != -1) continue;
158 if (client_desktop != *active_desktop && client_desktop != -1) continue;
161 /* Try to get its dimensions. */
162 if (! XGetGeometry(DADisplay, client, &root, &x, &y, &width, &height, &border, &depth)) continue;
163 if (! XTranslateCoordinates(DADisplay, client, root, x, y, &x, &y, &child)) continue;
165 /* Make sure it isn't hidden or shaded. */
167 get_atom_longs(client_state_atom, XA_ATOM, client, &states, &num_states);
168 for (j = 0; j < num_states; j++) {
169 if (states[j] == shaded_state) height = 3.0 * scale;
170 if (states[j] == skip_pager_state) draw = 0;
171 if (states[j] == hidden_state) draw = 0;
173 if (! draw) continue;
175 (*clients)[i]->window = client;
178 (*clients)[i]->rect.x = (double) x / scale;
179 (*clients)[i]->rect.y = (double) y / aspect;
180 (*clients)[i]->rect.width = (double) width / scale;
181 (*clients)[i]->rect.height = (double) height / aspect;
184 if (client_list_supported) XFree(data);
188 void destroy_clients(client_t ***clients, unsigned long num_clients) {
191 if (! *clients) return;
193 for (i = 0; i < num_clients; i++) free((*clients)[i]);
201 gcv.foreground = DAGetColor("darkGray");
202 XChangeGC(DADisplay, DAClearGC, GCForeground, &gcv);
204 gcv.foreground = DAGetColor("lightGray");
205 gcv.graphics_exposures = False;
207 dockapp_border1GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
209 gcv.foreground = DAGetColor("#222222");
210 dockapp_border2GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
212 gcv.foreground = DAGetColor("#0088ff");
213 active_desktopGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
215 gcv.foreground = DAGetColor("darkGray");
216 inactive_desktopGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
218 gcv.foreground = DAGetColor("white");
219 active_windowGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
221 gcv.foreground = DAGetColor("#999999");
222 inactive_windowGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
224 gcv.foreground = DAGetColor("black");
225 window_border1GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
227 gcv.foreground = DAGetColor("#333333");
228 window_border2GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
231 void draw_relief(Pixmap pixmap, unsigned int width, unsigned int height, GC desktopGC) {
233 XFillRectangle(DADisplay, pixmap, desktopGC, 0, 0, width, height);
235 XDrawLine(DADisplay, pixmap, dockapp_border2GC, 0, 0, 0, height - 2);
236 XDrawLine(DADisplay, pixmap, dockapp_border2GC, 1, 0, width - 1, 0);
238 XDrawLine(DADisplay, pixmap, dockapp_border1GC, 0, height - 1, width - 1, height - 1);
239 XDrawLine(DADisplay, pixmap, dockapp_border1GC, width - 1, 1, width - 1, height - 2);
242 int clicked(DARect *rect, int x, int y) {
243 if (rect->x > x) return 0;
244 if (rect->y > y) return 0;
245 if (rect->x + rect->width < x) return 0;
246 if (rect->y + rect->height < y) return 0;
250 int client_message(Atom message_type, Window window, long data0, long data1, long data2, long data3, long data4) {
253 memset(&event, 0, sizeof(event));
254 event.type = ClientMessage;
255 event.xclient.type = ClientMessage;
256 event.xclient.send_event = True;
257 event.xclient.window = window;
258 event.xclient.message_type = message_type;
259 event.xclient.format = 32;
260 event.xclient.data.l[0] = data0;
261 event.xclient.data.l[1] = data1;
262 event.xclient.data.l[2] = data2;
263 event.xclient.data.l[3] = data3;
264 event.xclient.data.l[4] = data4;
266 return XSendEvent(DADisplay, DefaultRootWindow(DADisplay), False, SubstructureRedirectMask | SubstructureNotifyMask, &event);
269 void change(int button, int state, int x, int y) {
271 unsigned long i, num_clients;
272 unsigned long active_desktop, active_window;
274 enumerate_clients(&clients, &num_clients, &active_desktop, &active_window);
275 for (i = num_clients - 1; i > 0; i--) {
276 if (! clients[i]->window) continue;
277 if (! clicked(&clients[i]->rect, x, y)) continue;
279 drag_window = (Window) clients[i]->window;
280 drag_button = button;
281 drag_x = x - clients[i]->rect.x;
282 drag_y = y - clients[i]->rect.y;
285 destroy_clients(&clients, num_clients);
287 if (drag_window && button == 1) {
288 client_message(active_window_atom, drag_window, FromTool, CurrentTime, 0, 0 ,0);
291 client_message(current_desktop_atom, DefaultRootWindow(DADisplay), desktop, 0, 0, 0, 0);
295 void release(int button, int state, int x, int y) {
296 if (button == drag_button) drag_window = 0;
300 Window active_window;
303 unsigned long num_clients;
304 unsigned long active_desktop;
308 enumerate_clients(&clients, &num_clients, &active_desktop, &active_window);
310 pixmap = XCreatePixmap(DADisplay, DAWindow, dockapp_width, dockapp_height, dockapp_depth);
311 if (active_desktop == desktop || desktop < 0) gc = active_desktopGC;
312 else gc = inactive_desktopGC;
313 draw_relief(pixmap, dockapp_width, dockapp_height, gc);
315 for (i = 0; i < num_clients; i++) {
316 if (! clients[i]->window) continue;
318 /* Draw windows which are partially off-screen. */
319 if (clients[i]->rect.x < 0) {
320 clients[i]->rect.width += clients[i]->rect.x;
321 clients[i]->rect.x = 0;
323 if (clients[i]->rect.y < 0) {
324 clients[i]->rect.height += clients[i]->rect.y;
325 clients[i]->rect.y = 0;
328 /* Draw small windows. */
329 if (clients[i]->rect.width < 2 || clients[i]->rect.height < 2) gc = window_border1GC;
330 else if ((long) clients[i]->window == active_window) gc = active_windowGC;
331 else gc = inactive_windowGC;
333 XFillRectangle(DADisplay, pixmap, gc, clients[i]->rect.x, clients[i]->rect.y, clients[i]->rect.width, clients[i]->rect.height);
334 if (clients[i]->rect.width < 2 || clients[i]->rect.height < 2) continue;
336 XDrawLine(DADisplay, pixmap, window_border1GC, clients[i]->rect.x, clients[i]->rect.y, clients[i]->rect.x, clients[i]->rect.y + clients[i]->rect.height - 2);
337 XDrawLine(DADisplay, pixmap, window_border1GC, clients[i]->rect.x + 1, clients[i]->rect.y, clients[i]->rect.x + clients[i]->rect.width - 1, clients[i]->rect.y);
338 XDrawLine(DADisplay, pixmap, window_border2GC, clients[i]->rect.x, clients[i]->rect.y + clients[i]->rect.height - 1, clients[i]->rect.x + clients[i]->rect.width - 1, clients[i]->rect.y + clients[i]->rect.height - 1);
339 XDrawLine(DADisplay, pixmap, window_border2GC, clients[i]->rect.x + clients[i]->rect.width - 1, clients[i]->rect.y + 1, clients[i]->rect.x + clients[i]->rect.width - 1, clients[i]->rect.y + clients[i]->rect.height - 2);
342 destroy_clients(&clients, num_clients);
345 XFreePixmap(DADisplay, pixmap);
348 void move(int x, int y) {
351 if (! drag_window) return;
352 if (x < 0 || y < 0) return;
353 if (x >= dockapp_width || y >= dockapp_height) return;
355 dest_x = (long) ((double) (x - drag_x) * scale);
356 dest_y = (long) ((double) (y - drag_y) * scale);
358 if (moveresize_supported) {
359 client_message(moveresize_window_atom, drag_window, StaticGravity | (3 << 8) | (FromTool << 12), drag_x, drag_y, 0, 0);
362 XMoveWindow(DADisplay, drag_window, dest_x, dest_y);
368 int main(int argc, char **argv) {
370 unsigned int root_width, root_height;
372 DACallbacks callbacks = { 0, change, release, move, 0, 0, page };
373 DAProgramOption options = { "-d", "--desktop", "Desktop to page", DOInteger, 0, { (int *) &desktop } };
375 DASetExpectedVersion(20020126);
377 display = XOpenDisplay(0);
379 root_width = DisplayWidth(display, DefaultScreen(display));
380 root_height = DisplayHeight(display, DefaultScreen(display));
381 aspect = (double) root_width / (double) root_height;
383 if (root_width > root_height) {
384 dockapp_width = DOCKAPP_SIZE;
385 dockapp_height = (double) DOCKAPP_SIZE / aspect;
388 dockapp_height = DOCKAPP_SIZE;
389 dockapp_width = (double) DOCKAPP_SIZE / aspect;
392 DAParseArguments(argc, argv, &options, 1, "OPTIONS", "pager");
393 DAOpenDisplay(0, argc, argv);
394 DACreateIcon("pager", dockapp_width, dockapp_height, argc, argv);
396 DASetCallbacks(&callbacks);
399 setup_atom(&supported_atom, "_NET_SUPPORTED");
400 setup_atom(&num_desktops_atom, "_NET_NUMBER_OF_DESKTOPS");
401 setup_atom(&desktop_geometry_atom, "_NET_DESKTOP_GEOMETRY");
402 setup_atom(¤t_desktop_atom, "_NET_CURRENT_DESKTOP");
403 setup_atom(&client_list_atom, "_NET_CLIENT_LIST_STACKING");
404 setup_atom(&client_desktop_atom, "_NET_WM_DESKTOP");
405 setup_atom(&client_state_atom, "_NET_WM_STATE");
406 setup_atom(&active_window_atom, "_NET_ACTIVE_WINDOW");
407 setup_atom(&moveresize_window_atom, "_NET_MOVERESIZE_WINDOW");
409 setup_atom(&shaded_state, "_NET_WM_STATE_SHADED");
410 setup_atom(&skip_pager_state, "_NET_WM_STATE_SKIP_PAGER");
411 setup_atom(&hidden_state, "_NET_WM_STATE_HIDDEN");
415 num_desktops = get_atom_long(num_desktops_atom, XA_CARDINAL, DefaultRootWindow(DADisplay));
417 desktop = get_atom_long(current_desktop_atom, XA_CARDINAL, DefaultRootWindow(DADisplay));
419 else if (desktop < 0) desktop = -1;
420 else if (desktop-- > num_desktops) {
421 fprintf(stderr, "There are only %ld desktops!\n", num_desktops);
425 XSetErrorHandler(error_handler);