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 XWindowAttributes dockapp_attr;
20 static double aspect, scale;
22 static int desktop_geometry_supported;
23 static int current_desktop_supported;
24 static int client_list_supported;
25 static int active_window_supported;
26 static int moveresize_supported;
33 int error_handler(Display *display, XErrorEvent *event) {
36 switch (event->error_code) {
38 /* The window may have gone away since we queried the window manager. */
42 if (XGetErrorText(display, event->error_code, buffer, sizeof(buffer))) {
43 fprintf(stderr, "%s\n", buffer);
52 void setup_atom(Atom *atom, const char *prop) {
53 *atom = XInternAtom(DADisplay, prop, True);
54 if (*atom != None) return;
55 fprintf(stderr, "Unknown atom %s!\n", prop);
59 /* Don't page the pager. */
61 long states = { skip_pager_state };
64 XChangeProperty(DADisplay, DAWindow, client_state_atom, XA_ATOM, 32, PropModeAppend, &states, 1);
67 if (snprintf(buffer, sizeof(buffer), "Desktop %d", desktop + 1) < 0) return;
70 if (snprintf(buffer, sizeof(buffer), "All desktops") < 0) return;
72 XStoreName(DADisplay, DAWindow, buffer);
75 void get_atom_longs(Atom atom, Atom type, Window window, long **data, unsigned long *num_items) {
78 unsigned long num_bytes;
80 XGetWindowProperty(DADisplay, window, atom, 0, 8192, False, type, &actual, &format, num_items, &num_bytes, (unsigned char **) data);
83 long get_atom_long(Atom atom, Atom type, Window window) {
86 unsigned long num_items;
88 get_atom_longs(atom, type, window, &data, &num_items);
89 if (num_items) ret = data[0];
95 void check_support() {
97 unsigned long i, num_items;
99 get_atom_longs(supported_atom, XA_ATOM, DefaultRootWindow(DADisplay), &data, &num_items);
100 for (i = 0; i < num_items; i++) {
101 if (data[i] == desktop_geometry_atom) desktop_geometry_supported = 1;
102 if (data[i] == current_desktop_atom) current_desktop_supported = 1;
103 if (data[i] == client_list_atom) client_list_supported = 1;
104 if (data[i] == active_window_atom) active_window_supported = 1;
105 if (data[i] == moveresize_window_atom) moveresize_supported = 1;
111 void enumerate_clients(client_t ***clients, unsigned long *num_clients, unsigned long *active_desktop, unsigned long *active_window) {
112 Window root, qroot, qparent, child, *wins, client;
114 unsigned int width, height, border, depth;
115 unsigned int root_width, root_height;
118 unsigned long i, j, num_states;
122 if (desktop_geometry_supported) {
123 get_atom_longs(desktop_geometry_atom, XA_CARDINAL, DefaultRootWindow(DADisplay), &states, &num_states);
124 root_width = states[0];
125 root_height = states[1];
129 root_width = DisplayWidth(DADisplay, DefaultScreen(DADisplay));
130 root_height = DisplayWidth(DADisplay, DefaultScreen(DADisplay));
136 if (! XGetWindowAttributes(DADisplay, DAWindow, &dockapp_attr)) return;
137 scale = (double) root_width / (double) dockapp_attr.width;
138 aspect = (double) root_height / (double) dockapp_attr.height;
140 *active_window = get_atom_long(active_window_atom, XA_WINDOW, dockapp_attr.root);
141 *active_desktop = get_atom_long(current_desktop_atom, XA_CARDINAL, DefaultRootWindow(DADisplay));
143 if (client_list_supported) {
144 get_atom_longs(client_list_atom, XA_WINDOW, dockapp_attr.root, &data, num_clients);
147 XQueryTree(DADisplay, dockapp_attr.root, &qroot, &qparent, &wins, (unsigned int *) num_clients);
150 *clients = (client_t **) malloc(sizeof(client_t *) * *num_clients);
152 fprintf(stderr, "Out of memory for clients!\n");
156 for (i = 0; i < *num_clients; i++) {
157 (*clients)[i] = (client_t *) malloc(sizeof(client_t));
158 if (! (*clients)[i]) {
159 fprintf(stderr, "Out of memory for client!\n");
162 (*clients)[i]->window = 0;
164 if (client_list_supported) client = data[i];
165 else client = XmuClientWindow(DADisplay, wins[i]);
167 /* Check the window is on our desktop (or all desktops). */
168 client_desktop = get_atom_long(client_desktop_atom, XA_CARDINAL, client);
170 if (client_desktop != desktop && client_desktop != -1) continue;
173 if (client_desktop != *active_desktop && client_desktop != -1) continue;
176 /* Try to get its dimensions. */
177 if (! XGetGeometry(DADisplay, client, &root, &x, &y, &width, &height, &border, &depth)) continue;
178 if (! XTranslateCoordinates(DADisplay, client, root, x, y, &x, &y, &child)) continue;
180 /* Make sure it isn't hidden or shaded. */
182 get_atom_longs(client_state_atom, XA_ATOM, client, &states, &num_states);
183 for (j = 0; j < num_states; j++) {
184 if (states[j] == shaded_state) height = 3.0 * scale;
185 if (states[j] == skip_pager_state) draw = 0;
186 if (states[j] == hidden_state) draw = 0;
188 if (! draw) continue;
190 (*clients)[i]->window = client;
193 (*clients)[i]->rect.x = (double) x / scale;
194 (*clients)[i]->rect.y = (double) y / aspect;
195 (*clients)[i]->rect.width = (double) width / scale;
196 (*clients)[i]->rect.height = (double) height / aspect;
199 if (client_list_supported) XFree(data);
203 void destroy_clients(client_t ***clients, unsigned long num_clients) {
206 if (! *clients) return;
208 for (i = 0; i < num_clients; i++) if ((*clients)[i]) free((*clients)[i]);
216 gcv.foreground = DAGetColor("darkGray");
217 XChangeGC(DADisplay, DAClearGC, GCForeground, &gcv);
219 gcv.foreground = DAGetColor("lightGray");
220 gcv.graphics_exposures = False;
222 dockapp_border1GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
224 gcv.foreground = DAGetColor("#222222");
225 dockapp_border2GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
227 gcv.foreground = DAGetColor("#0088ff");
228 active_desktopGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
230 gcv.foreground = DAGetColor("darkGray");
231 inactive_desktopGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
233 gcv.foreground = DAGetColor("white");
234 active_windowGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
236 gcv.foreground = DAGetColor("#999999");
237 inactive_windowGC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
239 gcv.foreground = DAGetColor("black");
240 window_border1GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
242 gcv.foreground = DAGetColor("#333333");
243 window_border2GC = XCreateGC(DADisplay, DAWindow, GCForeground|GCGraphicsExposures, &gcv);
246 void draw_relief(Pixmap pixmap, unsigned int width, unsigned int height, GC desktopGC) {
248 XFillRectangle(DADisplay, pixmap, desktopGC, 0, 0, width, height);
250 XDrawLine(DADisplay, pixmap, dockapp_border2GC, 0, 0, 0, height - 2);
251 XDrawLine(DADisplay, pixmap, dockapp_border2GC, 1, 0, width - 1, 0);
253 XDrawLine(DADisplay, pixmap, dockapp_border1GC, 0, height - 1, width - 1, height - 1);
254 XDrawLine(DADisplay, pixmap, dockapp_border1GC, width - 1, 1, width - 1, height - 2);
257 int clicked(DARect *rect, int x, int y) {
258 if (rect->x > x) return 0;
259 if (rect->y > y) return 0;
260 if (rect->x + rect->width < x) return 0;
261 if (rect->y + rect->height < y) return 0;
265 int client_message(Atom message_type, Window window, long data0, long data1, long data2, long data3, long data4) {
268 memset(&event, 0, sizeof(event));
269 event.type = ClientMessage;
270 event.xclient.type = ClientMessage;
271 event.xclient.send_event = True;
272 event.xclient.window = window;
273 event.xclient.message_type = message_type;
274 event.xclient.format = 32;
275 event.xclient.data.l[0] = data0;
276 event.xclient.data.l[1] = data1;
277 event.xclient.data.l[2] = data2;
278 event.xclient.data.l[3] = data3;
279 event.xclient.data.l[4] = data4;
281 return XSendEvent(DADisplay, DefaultRootWindow(DADisplay), False, SubstructureRedirectMask | SubstructureNotifyMask, &event);
284 void change(int button, int state, int x, int y) {
286 unsigned long i, num_clients;
287 unsigned long active_desktop, active_window;
289 enumerate_clients(&clients, &num_clients, &active_desktop, &active_window);
290 for (i = num_clients - 1; i > 0; i--) {
291 if (! clients[i]->window) continue;
292 if (! clicked(&clients[i]->rect, x, y)) continue;
294 drag_window = (Window) clients[i]->window;
295 drag_button = button;
296 drag_x = x - clients[i]->rect.x;
297 drag_y = y - clients[i]->rect.y;
300 destroy_clients(&clients, num_clients);
302 if (drag_window && button == 1) {
303 client_message(active_window_atom, drag_window, FromTool, CurrentTime, 0, 0 ,0);
306 client_message(current_desktop_atom, DefaultRootWindow(DADisplay), desktop, 0, 0, 0, 0);
310 void release(int button, int state, int x, int y) {
311 if (button == drag_button) drag_window = 0;
314 void draw_window(Pixmap pixmap, GC gc, client_t *client) {
315 /* Draw a blob for the window. */
316 XFillRectangle(DADisplay, pixmap, gc, client->rect.x, client->rect.y, client->rect.width, client->rect.height);
317 if (client->rect.width < 2 || client->rect.height < 2) return;
319 /* Draw a border around the window. */
320 XDrawLine(DADisplay, pixmap, window_border1GC, client->rect.x, client->rect.y, client->rect.x, client->rect.y + client->rect.height - 2);
321 XDrawLine(DADisplay, pixmap, window_border1GC, client->rect.x + 1, client->rect.y, client->rect.x + client->rect.width - 1, client->rect.y);
322 XDrawLine(DADisplay, pixmap, window_border2GC, client->rect.x, client->rect.y + client->rect.height - 1, client->rect.x + client->rect.width - 1, client->rect.y + client->rect.height - 1);
323 XDrawLine(DADisplay, pixmap, window_border2GC, client->rect.x + client->rect.width - 1, client->rect.y + 1, client->rect.x + client->rect.width - 1, client->rect.y + client->rect.height - 2);
325 if (dockapp_attr.width <= DOCKAPP_SIZE * 2) return;
326 if (dockapp_attr.height <= DOCKAPP_SIZE * 2) return;
328 /* Draw a drop shadow. */
329 XDrawLine(DADisplay, pixmap, dockapp_border2GC, client->rect.x + 1, client->rect.y + client->rect.height, client->rect.x + client->rect.width, client->rect.y + client->rect.height);
330 XDrawLine(DADisplay, pixmap, dockapp_border2GC, client->rect.x + client->rect.width, client->rect.y + 1, client->rect.x + client->rect.width, client->rect.y + client->rect.height);
334 Window active_window;
337 unsigned long num_clients;
338 unsigned long active_desktop;
342 enumerate_clients(&clients, &num_clients, &active_desktop, &active_window);
344 pixmap = XCreatePixmap(DADisplay, DAWindow, dockapp_attr.width, dockapp_attr.height, dockapp_attr.depth);
345 if (active_desktop == desktop || desktop < 0) gc = active_desktopGC;
346 else gc = inactive_desktopGC;
347 draw_relief(pixmap, dockapp_attr.width, dockapp_attr.height, gc);
349 for (i = 0; i < num_clients; i++) {
350 if (! clients[i]->window) continue;
352 /* Draw windows which are partially off-screen. */
353 if (clients[i]->rect.x < 0) {
354 clients[i]->rect.width += clients[i]->rect.x;
355 clients[i]->rect.x = 0;
357 if (clients[i]->rect.y < 0) {
358 clients[i]->rect.height += clients[i]->rect.y;
359 clients[i]->rect.y = 0;
362 /* Draw small windows. */
363 if (clients[i]->rect.width < 2 || clients[i]->rect.height < 2) gc = window_border1GC;
364 else if ((long) clients[i]->window == active_window) gc = active_windowGC;
365 else gc = inactive_windowGC;
367 draw_window(pixmap, gc, clients[i]);
370 destroy_clients(&clients, num_clients);
373 XFreePixmap(DADisplay, pixmap);
376 void move(int x, int y) {
379 if (! drag_window) return;
380 if (x < 0 || y < 0) return;
381 if (x >= dockapp_attr.width || y >= dockapp_attr.height) return;
383 dest_x = (long) ((double) (x - drag_x) * scale);
384 dest_y = (long) ((double) (y - drag_y) * scale);
386 if (moveresize_supported) {
387 client_message(moveresize_window_atom, drag_window, StaticGravity | (3 << 8) | (FromTool << 12), drag_x, drag_y, 0, 0);
390 XMoveWindow(DADisplay, drag_window, dest_x, dest_y);
396 int main(int argc, char **argv) {
398 unsigned int root_width, root_height;
400 DACallbacks callbacks = { 0, change, release, move, 0, 0, page };
401 DAProgramOption options = { "-d", "--desktop", "Desktop to page", DOInteger, 0, { (int *) &desktop } };
403 DASetExpectedVersion(20020126);
405 display = XOpenDisplay(0);
407 root_width = DisplayWidth(display, DefaultScreen(display));
408 root_height = DisplayHeight(display, DefaultScreen(display));
409 aspect = (double) root_width / (double) root_height;
411 if (root_width > root_height) {
412 dockapp_attr.width = DOCKAPP_SIZE;
413 dockapp_attr.height = (double) DOCKAPP_SIZE / aspect;
416 dockapp_attr.height = DOCKAPP_SIZE;
417 dockapp_attr.width = (double) DOCKAPP_SIZE / aspect;
420 DAParseArguments(argc, argv, &options, 1, "OPTIONS", "pager");
421 DAOpenDisplay(0, argc, argv);
422 DACreateIcon("pager", dockapp_attr.width, dockapp_attr.height, argc, argv);
424 DASetCallbacks(&callbacks);
427 setup_atom(&supported_atom, "_NET_SUPPORTED");
428 setup_atom(&num_desktops_atom, "_NET_NUMBER_OF_DESKTOPS");
429 setup_atom(&desktop_geometry_atom, "_NET_DESKTOP_GEOMETRY");
430 setup_atom(¤t_desktop_atom, "_NET_CURRENT_DESKTOP");
431 setup_atom(&client_list_atom, "_NET_CLIENT_LIST_STACKING");
432 setup_atom(&client_desktop_atom, "_NET_WM_DESKTOP");
433 setup_atom(&client_state_atom, "_NET_WM_STATE");
434 setup_atom(&active_window_atom, "_NET_ACTIVE_WINDOW");
435 setup_atom(&moveresize_window_atom, "_NET_MOVERESIZE_WINDOW");
437 setup_atom(&shaded_state, "_NET_WM_STATE_SHADED");
438 setup_atom(&skip_pager_state, "_NET_WM_STATE_SKIP_PAGER");
439 setup_atom(&hidden_state, "_NET_WM_STATE_HIDDEN");
443 num_desktops = get_atom_long(num_desktops_atom, XA_CARDINAL, DefaultRootWindow(DADisplay));
445 desktop = get_atom_long(current_desktop_atom, XA_CARDINAL, DefaultRootWindow(DADisplay));
447 else if (desktop < 0) desktop = -1;
448 else if (desktop-- > num_desktops) {
449 fprintf(stderr, "There are only %ld desktops!\n", num_desktops);
453 XSetErrorHandler(error_handler);