+ uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
+ (strtol(strgroups[1], NULL, 16)),
+ (strtol(strgroups[2], NULL, 16))};
+
+ return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
+}
+
+/*
+ * Convenience wrapper around xcb_create_window which takes care of depth, generating an ID and checking
+ * for errors.
+ *
+ */
+xcb_window_t create_window(xcb_connection_t *conn, Rect dims, uint16_t window_class, int cursor,
+ bool map, uint32_t mask, uint32_t *values) {
+ xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
+ xcb_window_t result = xcb_generate_id(conn);
+ xcb_cursor_t cursor_id = xcb_generate_id(conn);
+
+ /* If the window class is XCB_WINDOW_CLASS_INPUT_ONLY, depth has to be 0 */
+ uint16_t depth = (window_class == XCB_WINDOW_CLASS_INPUT_ONLY ? 0 : XCB_COPY_FROM_PARENT);
+
+ xcb_create_window(conn,
+ depth,
+ result, /* the window id */
+ root, /* parent == root */
+ dims.x, dims.y, dims.width, dims.height, /* dimensions */
+ 0, /* border = 0, we draw our own */
+ window_class,
+ XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
+ mask,
+ values);
+
+ /* Set the cursor */
+ i3Font *cursor_font = load_font(conn, "cursor");
+ xcb_create_glyph_cursor(conn, cursor_id, cursor_font->id, cursor_font->id,
+ (cursor == -1 ? XCB_CURSOR_LEFT_PTR : cursor),
+ (cursor == -1 ? XCB_CURSOR_LEFT_PTR : cursor) + 1,
+ 0, 0, 0, 65535, 65535, 65535);
+ xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
+ xcb_free_cursor(conn, cursor_id);
+
+ /* Map the window (= make it visible) */
+ if (map)
+ xcb_map_window(conn, result);
+
+ return result;
+}
+
+/*
+ * Changes a single value in the graphic context (so one doesn’t have to define an array of values)
+ *
+ */
+void xcb_change_gc_single(xcb_connection_t *conn, xcb_gcontext_t gc, uint32_t mask, uint32_t value) {
+ xcb_change_gc(conn, gc, mask, &value);
+}
+
+/*
+ * Draws a line from x,y to to_x,to_y using the given color
+ *
+ */
+void xcb_draw_line(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
+ uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t to_x, uint32_t to_y) {
+ xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, colorpixel);
+ xcb_point_t points[] = {{x, y}, {to_x, to_y}};
+ xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, drawable, gc, 2, points);
+}
+
+/*
+ * Draws a rectangle from x,y with width,height using the given color
+ *
+ */
+void xcb_draw_rect(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
+ uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
+ xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, colorpixel);
+ xcb_rectangle_t rect = {x, y, width, height};
+ xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
+}
+
+/*
+ * Generates a configure_notify event and sends it to the given window
+ * Applications need this to think they’ve configured themselves correctly.
+ * The truth is, however, that we will manage them.
+ *
+ */
+void fake_configure_notify(xcb_connection_t *conn, Rect r, xcb_window_t window) {
+ xcb_configure_notify_event_t generated_event;
+
+ generated_event.event = window;
+ generated_event.window = window;
+ generated_event.response_type = XCB_CONFIGURE_NOTIFY;
+
+ generated_event.x = r.x;
+ generated_event.y = r.y;
+ generated_event.width = r.width;
+ generated_event.height = r.height;
+
+ generated_event.border_width = 0;
+ generated_event.above_sibling = XCB_NONE;
+ generated_event.override_redirect = false;
+
+ xcb_send_event(conn, false, window, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char*)&generated_event);
+ xcb_flush(conn);
+}
+
+/*
+ * Generates a configure_notify_event with absolute coordinates (relative to the X root
+ * window, not to the client’s frame) for the given client.
+ *
+ */
+void fake_absolute_configure_notify(xcb_connection_t *conn, Client *client) {
+ Rect absolute;
+
+ absolute.x = client->rect.x + client->child_rect.x;
+ absolute.y = client->rect.y + client->child_rect.y;
+ absolute.width = client->child_rect.width;
+ absolute.height = client->child_rect.height;
+
+ fake_configure_notify(conn, absolute, client->child);
+}
+
+/*
+ * Finds out which modifier mask is the one for numlock, as the user may change this.
+ *
+ */
+void xcb_get_numlock_mask(xcb_connection_t *conn) {
+ xcb_key_symbols_t *keysyms;
+ xcb_get_modifier_mapping_cookie_t cookie;
+ xcb_get_modifier_mapping_reply_t *reply;
+ xcb_keycode_t *modmap;
+ int mask, i;
+ const int masks[8] = { XCB_MOD_MASK_SHIFT,
+ XCB_MOD_MASK_LOCK,
+ XCB_MOD_MASK_CONTROL,
+ XCB_MOD_MASK_1,
+ XCB_MOD_MASK_2,
+ XCB_MOD_MASK_3,
+ XCB_MOD_MASK_4,
+ XCB_MOD_MASK_5 };
+
+ /* Request the modifier map */
+ cookie = xcb_get_modifier_mapping_unchecked(conn);
+
+ /* Get the keysymbols */
+ keysyms = xcb_key_symbols_alloc(conn);
+
+ if ((reply = xcb_get_modifier_mapping_reply(conn, cookie, NULL)) == NULL) {
+ xcb_key_symbols_free(keysyms);
+ return;
+ }
+
+ modmap = xcb_get_modifier_mapping_keycodes(reply);
+
+ /* Get the keycode for numlock */
+#ifdef OLD_XCB_KEYSYMS_API
+ xcb_keycode_t numlock = xcb_key_symbols_get_keycode(keysyms, XCB_NUM_LOCK);
+#else
+ /* For now, we only use the first keysymbol. */
+ xcb_keycode_t *numlock_syms = xcb_key_symbols_get_keycode(keysyms, XCB_NUM_LOCK);
+ if (numlock_syms == NULL)
+ return;
+ xcb_keycode_t numlock = *numlock_syms;
+ free(numlock_syms);
+#endif
+
+ /* Check all modifiers (Mod1-Mod5, Shift, Control, Lock) */
+ for (mask = 0; mask < 8; mask++)
+ for (i = 0; i < reply->keycodes_per_modifier; i++)
+ if (modmap[(mask * reply->keycodes_per_modifier) + i] == numlock)
+ xcb_numlock_mask = masks[mask];
+
+ xcb_key_symbols_free(keysyms);
+ free(reply);
+}
+
+/*
+ * Raises the given window (typically client->frame) above all other windows
+ *
+ */
+void xcb_raise_window(xcb_connection_t *conn, xcb_window_t window) {
+ uint32_t values[] = { XCB_STACK_MODE_ABOVE };
+ xcb_configure_window(conn, window, XCB_CONFIG_WINDOW_STACK_MODE, values);
+}
+
+/*
+ *
+ * Prepares the given Cached_Pixmap for usage (checks whether the size of the
+ * object this pixmap is related to (e.g. a window) has changed and re-creates
+ * the pixmap if so).
+ *
+ */
+void cached_pixmap_prepare(xcb_connection_t *conn, struct Cached_Pixmap *pixmap) {
+ DLOG("preparing pixmap\n");
+
+ /* If the Rect did not change, the pixmap does not need to be recreated */
+ if (memcmp(&(pixmap->rect), pixmap->referred_rect, sizeof(Rect)) == 0)
+ return;
+
+ memcpy(&(pixmap->rect), pixmap->referred_rect, sizeof(Rect));
+
+ if (pixmap->id == 0 || pixmap->gc == 0) {
+ DLOG("Creating new pixmap...\n");
+ pixmap->id = xcb_generate_id(conn);
+ pixmap->gc = xcb_generate_id(conn);
+ } else {
+ DLOG("Re-creating this pixmap...\n");
+ xcb_free_gc(conn, pixmap->gc);
+ xcb_free_pixmap(conn, pixmap->id);