libi3: Rework font to support multiple backends
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@ -33,17 +33,28 @@ typedef struct Font i3Font;
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*
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*/
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struct Font {
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/** The xcb-id for the font */
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xcb_font_t id;
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/** Font information gathered from the server */
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xcb_query_font_reply_t *info;
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/** Font table for this font (may be NULL) */
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xcb_charinfo_t *table;
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/** The type of font */
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enum {
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FONT_TYPE_NONE = 0,
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FONT_TYPE_XCB,
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FONT_TYPE_PANGO
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} type;
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/** The height of the font, built from font_ascent + font_descent */
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int height;
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union {
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struct {
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/** The xcb-id for the font */
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xcb_font_t id;
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/** Font information gathered from the server */
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xcb_query_font_reply_t *info;
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/** Font table for this font (may be NULL) */
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xcb_charinfo_t *table;
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} xcb;
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} specific;
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};
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/* Since this file also gets included by utilities which don’t use the i3 log
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137
libi3/font.c
137
libi3/font.c
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@ -24,12 +24,14 @@ static const i3Font *savedFont = NULL;
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*/
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i3Font load_font(const char *pattern, const bool fallback) {
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i3Font font;
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font.type = FONT_TYPE_NONE;
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/* Send all our requests first */
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font.id = xcb_generate_id(conn);
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xcb_void_cookie_t font_cookie = xcb_open_font_checked(conn, font.id,
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font.specific.xcb.id = xcb_generate_id(conn);
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xcb_void_cookie_t font_cookie = xcb_open_font_checked(conn, font.specific.xcb.id,
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strlen(pattern), pattern);
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xcb_query_font_cookie_t info_cookie = xcb_query_font(conn, font.id);
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xcb_query_font_cookie_t info_cookie = xcb_query_font(conn, font.specific.xcb.id);
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/* Check for errors. If errors, fall back to default font. */
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xcb_generic_error_t *error;
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@ -40,8 +42,9 @@ i3Font load_font(const char *pattern, const bool fallback) {
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ELOG("Could not open font %s (X error %d). Trying fallback to 'fixed'.\n",
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pattern, error->error_code);
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pattern = "fixed";
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font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
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info_cookie = xcb_query_font(conn, font.id);
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font_cookie = xcb_open_font_checked(conn, font.specific.xcb.id,
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strlen(pattern), pattern);
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info_cookie = xcb_query_font(conn, font.specific.xcb.id);
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/* Check if we managed to open 'fixed' */
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error = xcb_request_check(conn, font_cookie);
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@ -50,8 +53,9 @@ i3Font load_font(const char *pattern, const bool fallback) {
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if (error != NULL) {
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ELOG("Could not open fallback font 'fixed', trying with '-misc-*'.\n");
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pattern = "-misc-*";
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font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
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info_cookie = xcb_query_font(conn, font.id);
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font_cookie = xcb_open_font_checked(conn, font.specific.xcb.id,
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strlen(pattern), pattern);
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info_cookie = xcb_query_font(conn, font.specific.xcb.id);
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if ((error = xcb_request_check(conn, font_cookie)) != NULL)
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errx(EXIT_FAILURE, "Could open neither requested font nor fallbacks "
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@ -60,18 +64,20 @@ i3Font load_font(const char *pattern, const bool fallback) {
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}
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/* Get information (height/name) for this font */
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if (!(font.info = xcb_query_font_reply(conn, info_cookie, NULL)))
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if (!(font.specific.xcb.info = xcb_query_font_reply(conn, info_cookie, NULL)))
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errx(EXIT_FAILURE, "Could not load font \"%s\"", pattern);
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/* Get the font table, if possible */
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if (xcb_query_font_char_infos_length(font.info) == 0)
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font.table = NULL;
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if (xcb_query_font_char_infos_length(font.specific.xcb.info) == 0)
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font.specific.xcb.table = NULL;
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else
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font.table = xcb_query_font_char_infos(font.info);
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font.specific.xcb.table = xcb_query_font_char_infos(font.specific.xcb.info);
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/* Calculate the font height */
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font.height = font.info->font_ascent + font.info->font_descent;
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font.height = font.specific.xcb.info->font_ascent + font.specific.xcb.info->font_descent;
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/* Set the font type and return successfully */
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font.type = FONT_TYPE_XCB;
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return font;
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}
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@ -88,10 +94,21 @@ void set_font(i3Font *font) {
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*
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*/
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void free_font(void) {
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/* Close the font and free the info */
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xcb_close_font(conn, savedFont->id);
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if (savedFont->info)
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free(savedFont->info);
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switch (savedFont->type) {
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case FONT_TYPE_NONE:
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/* Nothing to do */
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break;
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case FONT_TYPE_XCB: {
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/* Close the font and free the info */
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xcb_close_font(conn, savedFont->specific.xcb.id);
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if (savedFont->specific.xcb.info)
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free(savedFont->specific.xcb.info);
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break;
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}
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default:
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assert(false);
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break;
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}
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}
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/*
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@ -100,9 +117,22 @@ void free_font(void) {
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*/
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void set_font_colors(xcb_gcontext_t gc, uint32_t foreground, uint32_t background) {
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assert(savedFont != NULL);
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uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
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uint32_t values[] = { foreground, background, savedFont->id };
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xcb_change_gc(conn, gc, mask, values);
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switch (savedFont->type) {
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case FONT_TYPE_NONE:
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/* Nothing to do */
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break;
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case FONT_TYPE_XCB: {
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/* Change the font and colors in the GC */
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uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
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uint32_t values[] = { foreground, background, savedFont->specific.xcb.id };
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xcb_change_gc(conn, gc, mask, values);
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break;
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}
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default:
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assert(false);
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break;
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}
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}
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static int predict_text_width_xcb(const xcb_char2b_t *text, size_t text_len);
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@ -110,7 +140,7 @@ static int predict_text_width_xcb(const xcb_char2b_t *text, size_t text_len);
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static void draw_text_xcb(const xcb_char2b_t *text, size_t text_len, xcb_drawable_t drawable,
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xcb_gcontext_t gc, int x, int y, int max_width) {
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/* X11 coordinates for fonts start at the baseline */
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int pos_y = y + savedFont->info->font_ascent;
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int pos_y = y + savedFont->specific.xcb.info->font_ascent;
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/* The X11 protocol limits text drawing to 255 chars, so we may need
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* multiple calls */
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@ -148,8 +178,17 @@ void draw_text(i3String *text, xcb_drawable_t drawable,
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xcb_gcontext_t gc, int x, int y, int max_width) {
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assert(savedFont != NULL);
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draw_text_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text),
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drawable, gc, x, y, max_width);
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switch (savedFont->type) {
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case FONT_TYPE_NONE:
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/* Nothing to do */
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return;
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case FONT_TYPE_XCB:
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draw_text_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text),
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drawable, gc, x, y, max_width);
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break;
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default:
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assert(false);
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}
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}
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/*
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@ -160,17 +199,28 @@ void draw_text_ascii(const char *text, xcb_drawable_t drawable,
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xcb_gcontext_t gc, int x, int y, int max_width) {
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assert(savedFont != NULL);
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size_t text_len = strlen(text);
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if (text_len > 255) {
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/* The text is too long to draw it directly to X */
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i3String *str = i3string_from_utf8(text);
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draw_text(str, drawable, gc, x, y, max_width);
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i3string_free(str);
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} else {
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/* X11 coordinates for fonts start at the baseline */
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int pos_y = y + savedFont->info->font_ascent;
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switch (savedFont->type) {
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case FONT_TYPE_NONE:
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/* Nothing to do */
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return;
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case FONT_TYPE_XCB:
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{
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size_t text_len = strlen(text);
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if (text_len > 255) {
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/* The text is too long to draw it directly to X */
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i3String *str = i3string_from_utf8(text);
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draw_text(str, drawable, gc, x, y, max_width);
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i3string_free(str);
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} else {
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/* X11 coordinates for fonts start at the baseline */
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int pos_y = y + savedFont->specific.xcb.info->font_ascent;
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xcb_image_text_8(conn, text_len, drawable, gc, x, pos_y, text);
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xcb_image_text_8(conn, text_len, drawable, gc, x, pos_y, text);
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}
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break;
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}
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default:
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assert(false);
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}
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}
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@ -185,7 +235,7 @@ static int xcb_query_text_width(const xcb_char2b_t *text, size_t text_len) {
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/* Query the text width */
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xcb_generic_error_t *error;
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xcb_query_text_extents_cookie_t cookie = xcb_query_text_extents(conn,
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savedFont->id, text_len, (xcb_char2b_t*)text);
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savedFont->specific.xcb.id, text_len, (xcb_char2b_t*)text);
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xcb_query_text_extents_reply_t *reply = xcb_query_text_extents_reply(conn,
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cookie, &error);
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if (reply == NULL) {
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@ -193,7 +243,7 @@ static int xcb_query_text_width(const xcb_char2b_t *text, size_t text_len) {
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* a crash. Plus, the user will see the error in his log. */
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fprintf(stderr, "Could not get text extents (X error code %d)\n",
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error->error_code);
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return savedFont->info->max_bounds.character_width * text_len;
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return savedFont->specific.xcb.info->max_bounds.character_width * text_len;
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}
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int width = reply->overall_width;
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@ -206,13 +256,13 @@ static int predict_text_width_xcb(const xcb_char2b_t *input, size_t text_len) {
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return 0;
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int width;
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if (savedFont->table == NULL) {
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if (savedFont->specific.xcb.table == NULL) {
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/* If we don't have a font table, fall back to querying the server */
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width = xcb_query_text_width(input, text_len);
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} else {
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/* Save some pointers for convenience */
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xcb_query_font_reply_t *font_info = savedFont->info;
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xcb_charinfo_t *font_table = savedFont->table;
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xcb_query_font_reply_t *font_info = savedFont->specific.xcb.info;
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xcb_charinfo_t *font_table = savedFont->specific.xcb.table;
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/* Calculate the width using the font table */
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width = 0;
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@ -251,5 +301,16 @@ static int predict_text_width_xcb(const xcb_char2b_t *input, size_t text_len) {
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*
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*/
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int predict_text_width(i3String *text) {
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return predict_text_width_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text));
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assert(savedFont != NULL);
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switch (savedFont->type) {
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case FONT_TYPE_NONE:
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/* Nothing to do */
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return 0;
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case FONT_TYPE_XCB:
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return predict_text_width_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text));
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default:
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assert(false);
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return 0;
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}
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}
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@ -394,7 +394,7 @@ void load_configuration(xcb_connection_t *conn, const char *override_configpath,
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grab_all_keys(conn, false);
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}
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if (config.font.id == 0) {
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if (config.font.type == FONT_TYPE_NONE) {
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ELOG("You did not specify required configuration option \"font\"\n");
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config.font = load_font("fixed", true);
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set_font(&config.font);
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10
src/xcb.c
10
src/xcb.c
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@ -50,8 +50,9 @@ xcb_window_t create_window(xcb_connection_t *conn, Rect dims,
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xcb_cursor_t cursor_id = xcb_generate_id(conn);
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i3Font cursor_font = load_font("cursor", false);
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int xcb_cursor = xcursor_get_xcb_cursor(cursor);
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xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
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xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
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xcb_create_glyph_cursor(conn, cursor_id, cursor_font.specific.xcb.id,
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cursor_font.specific.xcb.id, xcb_cursor, xcb_cursor + 1, 0, 0, 0,
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65535, 65535, 65535);
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xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
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xcb_free_cursor(conn, cursor_id);
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}
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xcb_cursor_t cursor_id = xcb_generate_id(conn);
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i3Font cursor_font = load_font("cursor", false);
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int xcb_cursor = xcursor_get_xcb_cursor(cursor);
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xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
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xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
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xcb_create_glyph_cursor(conn, cursor_id, cursor_font.specific.xcb.id,
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cursor_font.specific.xcb.id, xcb_cursor, xcb_cursor + 1, 0, 0, 0,
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65535, 65535, 65535);
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xcb_change_window_attributes(conn, root, XCB_CW_CURSOR, &cursor_id);
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xcb_free_cursor(conn, cursor_id);
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xcb_flush(conn);
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