2 * vim:ts=4:sw=4:expandtab
4 * © 2010 Michael Stapelberg
6 * xcb.c: contains all functions which use XCB to talk to X11. Mostly wrappers
7 * around the rather complicated/ugly parts of the XCB API.
11 #include <xcb/xcb_image.h>
12 #include <xcb/xcb_atom.h>
13 #include <xcb/xcb_aux.h>
25 #include "unlock_indicator.h"
27 extern auth_state_t auth_state;
29 xcb_connection_t *conn;
32 #define curs_invisible_width 8
33 #define curs_invisible_height 8
35 static unsigned char curs_invisible_bits[] = {
36 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
38 #define curs_windows_width 11
39 #define curs_windows_height 19
41 static unsigned char curs_windows_bits[] = {
42 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
43 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
44 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
47 #define mask_windows_width 11
48 #define mask_windows_height 19
50 static unsigned char mask_windows_bits[] = {
51 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
52 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
53 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
56 static uint32_t get_colorpixel(char *hex) {
57 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
58 {hex[2], hex[3], '\0'},
59 {hex[4], hex[5], '\0'}};
60 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
61 (strtol(strgroups[1], NULL, 16)),
62 (strtol(strgroups[2], NULL, 16))};
64 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
67 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
68 xcb_visualtype_t *visual_type = NULL;
69 xcb_depth_iterator_t depth_iter;
70 xcb_visualtype_iterator_t visual_iter;
72 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
74 xcb_depth_next(&depth_iter)) {
75 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
77 xcb_visualtype_next(&visual_iter)) {
78 if (screen->root_visual != visual_iter.data->visual_id)
81 visual_type = visual_iter.data;
89 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t *resolution, char *color) {
90 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
91 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
92 resolution[0], resolution[1]);
94 /* Generate a Graphics Context and fill the pixmap with background color
95 * (for images that are smaller than your screen) */
96 xcb_gcontext_t gc = xcb_generate_id(conn);
97 uint32_t values[] = {get_colorpixel(color)};
98 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
99 xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]};
100 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
101 xcb_free_gc(conn, gc);
106 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
109 xcb_window_t win = xcb_generate_id(conn);
111 if (pixmap == XCB_NONE) {
112 mask |= XCB_CW_BACK_PIXEL;
113 values[0] = get_colorpixel(color);
115 mask |= XCB_CW_BACK_PIXMAP;
119 mask |= XCB_CW_OVERRIDE_REDIRECT;
122 mask |= XCB_CW_EVENT_MASK;
123 values[2] = XCB_EVENT_MASK_EXPOSURE |
124 XCB_EVENT_MASK_KEY_PRESS |
125 XCB_EVENT_MASK_KEY_RELEASE |
126 XCB_EVENT_MASK_VISIBILITY_CHANGE |
127 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
129 xcb_create_window(conn,
130 XCB_COPY_FROM_PARENT,
131 win, /* the window id */
132 scr->root, /* parent == root */
134 scr->width_in_pixels,
135 scr->height_in_pixels, /* dimensions */
136 0, /* border = 0, we draw our own */
137 XCB_WINDOW_CLASS_INPUT_OUTPUT,
138 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
142 char *name = "i3lock";
143 xcb_change_property(conn,
144 XCB_PROP_MODE_REPLACE,
152 /* Map the window (= make it visible) */
153 xcb_map_window(conn, win);
155 /* Raise window (put it on top) */
156 values[0] = XCB_STACK_MODE_ABOVE;
157 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
159 /* Ensure that the window is created and set up before returning */
166 * Repeatedly tries to grab pointer and keyboard (up to the specified number of
169 * Returns true if the grab succeeded, false if not.
172 bool grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor, int tries) {
173 xcb_grab_pointer_cookie_t pcookie;
174 xcb_grab_pointer_reply_t *preply;
176 xcb_grab_keyboard_cookie_t kcookie;
177 xcb_grab_keyboard_reply_t *kreply;
179 const suseconds_t screen_redraw_timeout = 100000; /* 100ms */
181 /* Using few variables to trigger a redraw_screen() if too many tries */
182 bool redrawn = false;
183 struct timeval start;
184 if (gettimeofday(&start, NULL) == -1) {
185 err(EXIT_FAILURE, "gettimeofday");
188 while (tries-- > 0) {
189 pcookie = xcb_grab_pointer(
191 false, /* get all pointer events specified by the following mask */
192 screen->root, /* grab the root window */
193 XCB_NONE, /* which events to let through */
194 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
195 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
196 XCB_NONE, /* confine_to = in which window should the cursor stay */
197 cursor, /* we change the cursor to whatever the user wanted */
200 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
201 preply->status == XCB_GRAB_STATUS_SUCCESS) {
206 /* In case the grab failed, we still need to free the reply */
209 /* Make this quite a bit slower */
213 if (gettimeofday(&now, NULL) == -1) {
214 err(EXIT_FAILURE, "gettimeofday");
217 struct timeval elapsed;
218 timersub(&now, &start, &elapsed);
221 (tries % 100) == 0 &&
222 elapsed.tv_usec >= screen_redraw_timeout) {
228 while (tries-- > 0) {
229 kcookie = xcb_grab_keyboard(
231 true, /* report events */
232 screen->root, /* grab the root window */
234 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
235 XCB_GRAB_MODE_ASYNC);
237 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
238 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
243 /* In case the grab failed, we still need to free the reply */
246 /* Make this quite a bit slower */
250 if (gettimeofday(&now, NULL) == -1) {
251 err(EXIT_FAILURE, "gettimeofday");
254 struct timeval elapsed;
255 timersub(&now, &start, &elapsed);
257 /* Trigger a screen redraw if 100ms elapsed */
259 (tries % 100) == 0 &&
260 elapsed.tv_usec >= screen_redraw_timeout) {
269 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
274 unsigned char *curs_bits;
275 unsigned char *mask_bits;
280 curs_bits = curs_invisible_bits;
281 mask_bits = curs_invisible_bits;
282 curs_w = curs_invisible_width;
283 curs_h = curs_invisible_height;
286 curs_bits = curs_windows_bits;
287 mask_bits = mask_windows_bits;
288 curs_w = curs_windows_width;
289 curs_h = curs_windows_height;
293 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
296 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
306 mask = xcb_create_pixmap_from_bitmap_data(conn,
316 cursor = xcb_generate_id(conn);
318 xcb_create_cursor(conn,
326 xcb_free_pixmap(conn, bitmap);
327 xcb_free_pixmap(conn, mask);
332 static xcb_atom_t _NET_ACTIVE_WINDOW = XCB_NONE;
333 void _init_net_active_window(xcb_connection_t *conn) {
334 if (_NET_ACTIVE_WINDOW != XCB_NONE) {
335 /* already initialized */
338 xcb_generic_error_t *err;
339 xcb_intern_atom_reply_t *atom_reply = xcb_intern_atom_reply(
341 xcb_intern_atom(conn, 0, strlen("_NET_ACTIVE_WINDOW"), "_NET_ACTIVE_WINDOW"),
343 if (atom_reply == NULL) {
344 fprintf(stderr, "X11 Error %d\n", err->error_code);
348 _NET_ACTIVE_WINDOW = atom_reply->atom;
352 xcb_window_t find_focused_window(xcb_connection_t *conn, const xcb_window_t root) {
353 xcb_window_t result = XCB_NONE;
355 _init_net_active_window(conn);
357 xcb_get_property_reply_t *prop_reply = xcb_get_property_reply(
359 xcb_get_property_unchecked(
360 conn, false, root, _NET_ACTIVE_WINDOW, XCB_GET_PROPERTY_TYPE_ANY, 0, 1 /* word */),
362 if (prop_reply == NULL) {
365 if (xcb_get_property_value_length(prop_reply) == 0) {
368 if (prop_reply->type != XCB_ATOM_WINDOW) {
372 result = *((xcb_window_t *)xcb_get_property_value(prop_reply));
380 void set_focused_window(xcb_connection_t *conn, const xcb_window_t root, const xcb_window_t window) {
381 xcb_client_message_event_t ev;
382 memset(&ev, '\0', sizeof(xcb_client_message_event_t));
384 _init_net_active_window(conn);
386 ev.response_type = XCB_CLIENT_MESSAGE;
388 ev.type = _NET_ACTIVE_WINDOW;
390 ev.data.data32[0] = 2; /* 2 = pager */
392 xcb_send_event(conn, false, root, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char *)&ev);