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, uint16_t window_class,
20 enum xcursor_cursor_t cursor, bool map, uint32_t mask, uint32_t *values) {
21 xcb_window_t result = xcb_generate_id(conn);
23 /* By default, the color depth determined in src/main.c is used (32 bit if
24 * available, otherwise the X11 root window’s default depth). */
25 uint16_t depth = root_depth;
26 xcb_visualid_t visual = visual_id;
28 /* If the window class is XCB_WINDOW_CLASS_INPUT_ONLY, we copy depth and
29 * visual id from the parent window. */
30 if (window_class == XCB_WINDOW_CLASS_INPUT_ONLY) {
31 depth = XCB_COPY_FROM_PARENT;
32 visual = XCB_COPY_FROM_PARENT;
35 xcb_create_window(conn,
37 result, /* the window id */
38 root, /* parent == root */
39 dims.x, dims.y, dims.width, dims.height, /* dimensions */
40 0, /* border = 0, we draw our own */
47 if (xcursor_supported) {
49 values[0] = xcursor_get_cursor(cursor);
50 xcb_change_window_attributes(conn, result, mask, values);
52 xcb_cursor_t cursor_id = xcb_generate_id(conn);
53 i3Font cursor_font = load_font("cursor", false);
54 int xcb_cursor = xcursor_get_xcb_cursor(cursor);
55 xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
56 xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
57 xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
58 xcb_free_cursor(conn, cursor_id);
61 /* Map the window (= make it visible) */
63 xcb_map_window(conn, result);
69 * Draws a line from x,y to to_x,to_y using the given color
72 void xcb_draw_line(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
73 uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t to_x, uint32_t to_y) {
74 xcb_change_gc(conn, gc, XCB_GC_FOREGROUND, (uint32_t[]){ colorpixel });
75 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, drawable, gc, 2,
76 (xcb_point_t[]) { {x, y}, {to_x, to_y} });
80 * Draws a rectangle from x,y with width,height using the given color
83 void xcb_draw_rect(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
84 uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
85 xcb_change_gc(conn, gc, XCB_GC_FOREGROUND, (uint32_t[]){ colorpixel });
86 xcb_rectangle_t rect = {x, y, width, height};
87 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
91 * Generates a configure_notify_event with absolute coordinates (relative to the X root
92 * window, not to the client’s frame) for the given client.
95 void fake_absolute_configure_notify(Con *con) {
96 xcb_rectangle_t absolute;
97 if (con->window == NULL)
100 absolute.x = con->rect.x + con->window_rect.x;
101 absolute.y = con->rect.y + con->window_rect.y;
102 absolute.width = con->window_rect.width;
103 absolute.height = con->window_rect.height;
105 DLOG("fake rect = (%d, %d, %d, %d)\n", absolute.x, absolute.y, absolute.width, absolute.height);
107 fake_configure_notify(conn, absolute, con->window->id, con->border_width);
111 * Sends the WM_TAKE_FOCUS ClientMessage to the given window
114 void send_take_focus(xcb_window_t window) {
115 /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
116 * In order to properly initialize these bytes, we allocate 32 bytes even
117 * though we only need less for an xcb_configure_notify_event_t */
118 void *event = scalloc(32);
119 xcb_client_message_event_t *ev = event;
121 ev->response_type = XCB_CLIENT_MESSAGE;
123 ev->type = A_WM_PROTOCOLS;
125 ev->data.data32[0] = A_WM_TAKE_FOCUS;
126 ev->data.data32[1] = XCB_CURRENT_TIME;
128 DLOG("Sending WM_TAKE_FOCUS to the client\n");
129 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
134 * Raises the given window (typically client->frame) above all other windows
137 void xcb_raise_window(xcb_connection_t *conn, xcb_window_t window) {
138 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
139 xcb_configure_window(conn, window, XCB_CONFIG_WINDOW_STACK_MODE, values);
143 * Configures the given window to have the size/position specified by given rect
146 void xcb_set_window_rect(xcb_connection_t *conn, xcb_window_t window, Rect r) {
147 xcb_void_cookie_t cookie;
148 cookie = xcb_configure_window(conn, window,
149 XCB_CONFIG_WINDOW_X |
150 XCB_CONFIG_WINDOW_Y |
151 XCB_CONFIG_WINDOW_WIDTH |
152 XCB_CONFIG_WINDOW_HEIGHT,
154 /* ignore events which are generated because we configured a window */
155 add_ignore_event(cookie.sequence, -1);
159 * Returns true if the given reply contains the given atom.
162 bool xcb_reply_contains_atom(xcb_get_property_reply_t *prop, xcb_atom_t atom) {
163 if (prop == NULL || xcb_get_property_value_length(prop) == 0)
167 if ((atoms = xcb_get_property_value(prop)) == NULL)
170 for (int i = 0; i < xcb_get_property_value_length(prop) / (prop->format / 8); i++)
171 if (atoms[i] == atom)
179 * Moves the mouse pointer into the middle of rect.
182 void xcb_warp_pointer_rect(xcb_connection_t *conn, Rect *rect) {
183 int mid_x = rect->x + (rect->width / 2);
184 int mid_y = rect->y + (rect->height / 2);
186 LOG("warp pointer to: %d %d\n", mid_x, mid_y);
187 xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y);
191 * Set the cursor of the root window to the given cursor id.
192 * This function should only be used if xcursor_supported == false.
193 * Otherwise, use xcursor_set_root_cursor().
196 void xcb_set_root_cursor(int cursor) {
197 xcb_cursor_t cursor_id = xcb_generate_id(conn);
198 i3Font cursor_font = load_font("cursor", false);
199 int xcb_cursor = xcursor_get_xcb_cursor(cursor);
200 xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
201 xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
202 xcb_change_window_attributes(conn, root, XCB_CW_CURSOR, &cursor_id);
203 xcb_free_cursor(conn, cursor_id);