2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
7 * xcb.c: Helper functions for easier usage of XCB
12 unsigned int xcb_numlock_mask;
15 * Convenience wrapper around xcb_create_window which takes care of depth, generating an ID and checking
19 xcb_window_t create_window(xcb_connection_t *conn, Rect dims,
20 uint16_t depth, xcb_visualid_t visual, uint16_t window_class,
21 enum xcursor_cursor_t cursor, bool map, uint32_t mask, uint32_t *values) {
22 xcb_window_t result = xcb_generate_id(conn);
24 /* If the window class is XCB_WINDOW_CLASS_INPUT_ONLY, we copy depth and
25 * visual id from the parent window. */
26 if (window_class == XCB_WINDOW_CLASS_INPUT_ONLY) {
27 depth = XCB_COPY_FROM_PARENT;
28 visual = XCB_COPY_FROM_PARENT;
31 xcb_create_window(conn,
33 result, /* the window id */
34 root, /* parent == root */
35 dims.x, dims.y, dims.width, dims.height, /* dimensions */
36 0, /* border = 0, we draw our own */
43 if (xcursor_supported) {
45 values[0] = xcursor_get_cursor(cursor);
46 xcb_change_window_attributes(conn, result, mask, values);
48 xcb_cursor_t cursor_id = xcb_generate_id(conn);
49 i3Font cursor_font = load_font("cursor", false);
50 int xcb_cursor = xcursor_get_xcb_cursor(cursor);
51 xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
52 xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
53 xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
54 xcb_free_cursor(conn, cursor_id);
57 /* Map the window (= make it visible) */
59 xcb_map_window(conn, result);
65 * Draws a line from x,y to to_x,to_y using the given color
68 void xcb_draw_line(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
69 uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t to_x, uint32_t to_y) {
70 xcb_change_gc(conn, gc, XCB_GC_FOREGROUND, (uint32_t[]){ colorpixel });
71 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, drawable, gc, 2,
72 (xcb_point_t[]) { {x, y}, {to_x, to_y} });
76 * Draws a rectangle from x,y with width,height using the given color
79 void xcb_draw_rect(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
80 uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
81 xcb_change_gc(conn, gc, XCB_GC_FOREGROUND, (uint32_t[]){ colorpixel });
82 xcb_rectangle_t rect = {x, y, width, height};
83 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
87 * Generates a configure_notify_event with absolute coordinates (relative to the X root
88 * window, not to the client’s frame) for the given client.
91 void fake_absolute_configure_notify(Con *con) {
92 xcb_rectangle_t absolute;
93 if (con->window == NULL)
96 absolute.x = con->rect.x + con->window_rect.x;
97 absolute.y = con->rect.y + con->window_rect.y;
98 absolute.width = con->window_rect.width;
99 absolute.height = con->window_rect.height;
101 DLOG("fake rect = (%d, %d, %d, %d)\n", absolute.x, absolute.y, absolute.width, absolute.height);
103 fake_configure_notify(conn, absolute, con->window->id, con->border_width);
107 * Sends the WM_TAKE_FOCUS ClientMessage to the given window
110 void send_take_focus(xcb_window_t window) {
111 /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
112 * In order to properly initialize these bytes, we allocate 32 bytes even
113 * though we only need less for an xcb_configure_notify_event_t */
114 void *event = scalloc(32);
115 xcb_client_message_event_t *ev = event;
117 ev->response_type = XCB_CLIENT_MESSAGE;
119 ev->type = A_WM_PROTOCOLS;
121 ev->data.data32[0] = A_WM_TAKE_FOCUS;
122 ev->data.data32[1] = XCB_CURRENT_TIME;
124 DLOG("Sending WM_TAKE_FOCUS to the client\n");
125 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
130 * Raises the given window (typically client->frame) above all other windows
133 void xcb_raise_window(xcb_connection_t *conn, xcb_window_t window) {
134 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
135 xcb_configure_window(conn, window, XCB_CONFIG_WINDOW_STACK_MODE, values);
139 * Configures the given window to have the size/position specified by given rect
142 void xcb_set_window_rect(xcb_connection_t *conn, xcb_window_t window, Rect r) {
143 xcb_void_cookie_t cookie;
144 cookie = xcb_configure_window(conn, window,
145 XCB_CONFIG_WINDOW_X |
146 XCB_CONFIG_WINDOW_Y |
147 XCB_CONFIG_WINDOW_WIDTH |
148 XCB_CONFIG_WINDOW_HEIGHT,
150 /* ignore events which are generated because we configured a window */
151 add_ignore_event(cookie.sequence, -1);
155 * Returns true if the given reply contains the given atom.
158 bool xcb_reply_contains_atom(xcb_get_property_reply_t *prop, xcb_atom_t atom) {
159 if (prop == NULL || xcb_get_property_value_length(prop) == 0)
163 if ((atoms = xcb_get_property_value(prop)) == NULL)
166 for (int i = 0; i < xcb_get_property_value_length(prop) / (prop->format / 8); i++)
167 if (atoms[i] == atom)
175 * Moves the mouse pointer into the middle of rect.
178 void xcb_warp_pointer_rect(xcb_connection_t *conn, Rect *rect) {
179 int mid_x = rect->x + (rect->width / 2);
180 int mid_y = rect->y + (rect->height / 2);
182 LOG("warp pointer to: %d %d\n", mid_x, mid_y);
183 xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y);
187 * Set the cursor of the root window to the given cursor id.
188 * This function should only be used if xcursor_supported == false.
189 * Otherwise, use xcursor_set_root_cursor().
192 void xcb_set_root_cursor(int cursor) {
193 xcb_cursor_t cursor_id = xcb_generate_id(conn);
194 i3Font cursor_font = load_font("cursor", false);
195 int xcb_cursor = xcursor_get_xcb_cursor(cursor);
196 xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
197 xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
198 xcb_change_window_attributes(conn, root, XCB_CW_CURSOR, &cursor_id);
199 xcb_free_cursor(conn, cursor_id);
204 * Get depth of visual specified by visualid
207 uint16_t get_visual_depth(xcb_visualid_t visual_id){
208 xcb_depth_iterator_t depth_iter;
210 depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
211 for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
212 xcb_visualtype_iterator_t visual_iter;
214 visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
215 for (; visual_iter.rem; xcb_visualtype_next(&visual_iter)) {
216 if (visual_id == visual_iter.data->visual_id) {
217 return depth_iter.data->depth;
225 * Get visualid with specified depth
228 xcb_visualid_t get_visualid_by_depth(uint16_t depth){
229 xcb_depth_iterator_t depth_iter;
231 depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
232 for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
233 if (depth_iter.data->depth != depth)
236 xcb_visualtype_iterator_t visual_iter;
238 visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
239 if (!visual_iter.rem)
241 return visual_iter.data->visual_id;