+
+/*
+ * 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) {
+ LOG("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) {
+ LOG("Creating new pixmap...\n");
+ pixmap->id = xcb_generate_id(conn);
+ pixmap->gc = xcb_generate_id(conn);
+ } else {
+ LOG("Re-creating this pixmap...\n");
+ xcb_free_gc(conn, pixmap->gc);
+ xcb_free_pixmap(conn, pixmap->id);
+ }
+
+ xcb_create_pixmap(conn, root_depth, pixmap->id,
+ pixmap->referred_drawable, pixmap->rect.width, pixmap->rect.height);
+
+ xcb_create_gc(conn, pixmap->gc, pixmap->id, 0, 0);
+}
+
+/*
+ * Returns the xcb_charinfo_t for the given character (specified by row and
+ * column in the lookup table) if existing, otherwise the minimum bounds.
+ *
+ */
+static xcb_charinfo_t *get_charinfo(int col, int row, xcb_query_font_reply_t *font_info,
+ xcb_charinfo_t *table, bool dont_fallback) {
+ xcb_charinfo_t *result;
+
+ /* Bounds checking */
+ if (row < font_info->min_byte1 || row > font_info->max_byte1 ||
+ col < font_info->min_char_or_byte2 || col > font_info->max_char_or_byte2)
+ return NULL;
+
+ /* If we don’t have a table to lookup the infos per character, return the
+ * minimum bounds */
+ if (table == NULL)
+ return &font_info->min_bounds;
+
+ result = &table[((row - font_info->min_byte1) *
+ (font_info->max_char_or_byte2 - font_info->min_char_or_byte2 + 1)) +
+ (col - font_info->min_char_or_byte2)];
+
+ /* If the character has an entry in the table, return it */
+ if (result->character_width != 0 ||
+ (result->right_side_bearing |
+ result->left_side_bearing |
+ result->ascent |
+ result->descent) != 0)
+ return result;
+
+ /* Otherwise, get the default character and return its charinfo */
+ if (dont_fallback)
+ return NULL;
+
+ return get_charinfo((font_info->default_char >> 8),
+ (font_info->default_char & 0xFF),
+ font_info,
+ table,
+ true);
+}
+
+/*
+ * Calculate the width of the given text (16-bit characters, UCS) with given
+ * real length (amount of glyphs) using the given font.
+ *
+ */
+int predict_text_width(xcb_connection_t *conn, const char *font_pattern, char *text, int length) {
+ xcb_query_font_reply_t *font_info;
+ xcb_charinfo_t *table;
+ int i, width = 0;
+ i3Font *font = load_font(conn, font_pattern);
+
+ font_info = xcb_query_font_reply(conn, xcb_query_font_unchecked(conn, font->id), NULL);
+ table = xcb_query_font_char_infos(font_info);
+
+ for (i = 0; i < 2 * length; i += 2) {
+ xcb_charinfo_t *info = get_charinfo(text[i+1], text[i], font_info, table, false);
+ if (info == NULL)
+ continue;
+ width += info->character_width;
+ }
+
+ free(font_info);
+
+ return width;
+}