Enhance libi3 and use it in i3bar.

Abstracted draw_text and predict_text_width into libi3. Use
predict_text_width from libi3 in i3 too. This required tracking
xcb_connection in a xcb_connection_t *conn variable that libi3
expects to be available in i3bar.
This commit is contained in:
Fernando Tarlá Cardoso Lemos 2011-11-13 17:19:42 -02:00 committed by Michael Stapelberg
parent 70151ea238
commit 5c2088c87e
11 changed files with 307 additions and 262 deletions

View File

@ -103,12 +103,4 @@ void draw_bars();
*/
void redraw_bars();
/*
* Predicts the length of text based on cached data.
* The string has to be encoded in ucs2 and glyph_len has to be the length
* of the string (in glyphs).
*
*/
uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length);
#endif

View File

@ -124,8 +124,8 @@ static int workspaces_string_cb(void *params_, const unsigned char *val, unsigne
params->workspaces_walk->ucs2_name = ucs2_name;
params->workspaces_walk->name_glyphs = ucs2_len;
params->workspaces_walk->name_width =
predict_text_extents(params->workspaces_walk->ucs2_name,
params->workspaces_walk->name_glyphs);
predict_text_width((char *)params->workspaces_walk->ucs2_name,
params->workspaces_walk->name_glyphs, true);
DLOG("Got Workspace %s, name_width: %d, glyphs: %d\n",
params->workspaces_walk->name,

View File

@ -48,12 +48,12 @@ xcb_connection_t *xcb_connection;
int screen;
xcb_screen_t *xcb_screen;
xcb_window_t xcb_root;
xcb_font_t xcb_font;
/* We need to cache some data to speed up text-width-prediction */
xcb_query_font_reply_t *font_info;
int font_height;
xcb_charinfo_t *font_table;
/* This is needed for integration with libi3 */
xcb_connection_t *conn;
/* The font we'll use */
static i3Font font;
/* These are only relevant for XKB, which we only need for grabbing modifiers */
Display *xkb_dpy;
@ -99,75 +99,6 @@ int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
return 0;
}
/*
* Predicts the length of text based on cached data.
* The string has to be encoded in ucs2 and glyph_len has to be the length
* of the string (in glyphs).
*
*/
uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
/* If we don't have per-character data, return the maximum width */
if (font_table == NULL) {
return (font_info->max_bounds.character_width * length);
}
uint32_t width = 0;
uint32_t i;
for (i = 0; i < length; i++) {
xcb_charinfo_t *info;
int row = text[i].byte1;
int col = text[i].byte2;
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) {
continue;
}
/* Don't you ask me, how this one works… */
info = &font_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 (info->character_width != 0 ||
(info->right_side_bearing |
info->left_side_bearing |
info->ascent |
info->descent) != 0) {
width += info->character_width;
}
}
return width;
}
/*
* Draws text given in UCS-2-encoding to a given drawable and position
*
*/
void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
xcb_char2b_t *text, uint32_t glyph_count) {
int offset = 0;
int16_t pos_x = x;
int16_t font_ascent = font_info->font_ascent;
while (glyph_count > 0) {
uint8_t chunk_size = MIN(255, glyph_count);
uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
xcb_image_text_16(xcb_connection,
chunk_size,
drawable,
ctx,
pos_x, y + font_ascent,
text + offset);
offset += chunk_size;
pos_x += chunk_width;
glyph_count -= chunk_size;
}
}
/*
* Redraws the statusline to the buffer
*
@ -181,16 +112,16 @@ void refresh_statusline() {
xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
uint32_t old_statusline_width = statusline_width;
statusline_width = predict_text_extents(text, glyph_count);
statusline_width = predict_text_width((char*)text, glyph_count, true);
/* If the statusline is bigger than our screen we need to make sure that
* the pixmap provides enough space, so re-allocate if the width grew */
if (statusline_width > xcb_screen->width_in_pixels &&
statusline_width > old_statusline_width)
realloc_sl_buffer();
xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font_height };
xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font.height };
xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
draw_text(statusline_pm, statusline_ctx, 0, 0, text, glyph_count);
draw_text((char*)text, glyph_count, true, statusline_pm, statusline_ctx, 0, 0);
FREE(text);
}
@ -242,9 +173,9 @@ void unhide_bars() {
values[0] = walk->rect.x;
if (config.position == POS_TOP)
values[1] = walk->rect.y;
else values[1] = walk->rect.y + walk->rect.h - font_height - 6;
else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
values[2] = walk->rect.w;
values[3] = font_height + 6;
values[3] = font.height + 6;
values[4] = XCB_STACK_MODE_ABOVE;
DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
cookie = xcb_configure_window_checked(xcb_connection,
@ -378,8 +309,8 @@ static void configure_trayclients() {
clients++;
DLOG("Configuring tray window %08x to x=%d\n",
trayclient->win, output->rect.w - (clients * (font_height + 2)));
uint32_t x = output->rect.w - (clients * (font_height + 2));
trayclient->win, output->rect.w - (clients * (font.height + 2)));
uint32_t x = output->rect.w - (clients * (font.height + 2));
xcb_configure_window(xcb_connection,
trayclient->win,
XCB_CONFIG_WINDOW_X,
@ -465,7 +396,7 @@ static void handle_client_message(xcb_client_message_event_t* event) {
xcb_reparent_window(xcb_connection,
client,
output->bar,
output->rect.w - font_height - 2,
output->rect.w - font.height - 2,
2);
/* We reconfigure the window to use a reasonable size. The systray
* specification explicitly says:
@ -473,8 +404,8 @@ static void handle_client_message(xcb_client_message_event_t* event) {
* should do their best to cope with any size effectively
*/
mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
values[0] = font_height;
values[1] = font_height;
values[0] = font.height;
values[1] = font.height;
xcb_configure_window(xcb_connection,
client,
mask,
@ -649,10 +580,10 @@ static void handle_configure_request(xcb_configure_request_event_t *event) {
continue;
xcb_rectangle_t rect;
rect.x = output->rect.w - (clients * (font_height + 2));
rect.x = output->rect.w - (clients * (font.height + 2));
rect.y = 2;
rect.width = font_height;
rect.height = font_height;
rect.width = font.height;
rect.height = font.height;
DLOG("This is a tray window. x = %d\n", rect.x);
fake_configure_notify(xcb_connection, rect, event->window, 0);
@ -778,6 +709,7 @@ char *init_xcb_early() {
ELOG("Cannot open display\n");
exit(EXIT_FAILURE);
}
conn = xcb_connection;
DLOG("Connected to xcb\n");
/* We have to request the atoms we need */
@ -869,29 +801,16 @@ char *init_xcb_early() {
*
*/
void init_xcb_late(char *fontname) {
if (fontname == NULL) {
/* XXX: font fallback to 'misc' like i3 does it would be good. */
if (fontname == NULL)
fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
}
/* We load and allocate the font */
xcb_font = xcb_generate_id(xcb_connection);
xcb_void_cookie_t open_font_cookie;
open_font_cookie = xcb_open_font_checked(xcb_connection,
xcb_font,
strlen(fontname),
fontname);
/* Load the font */
font = load_font(fontname, true);
set_font(&font);
DLOG("Calculated Font-height: %d\n", font.height);
/* We need to save info about the font, because we need the font's height and
* information about the width of characters */
xcb_query_font_cookie_t query_font_cookie;
query_font_cookie = xcb_query_font(xcb_connection,
xcb_font);
xcb_change_gc(xcb_connection,
statusline_ctx,
XCB_GC_FONT,
(uint32_t[]){ xcb_font });
/* Set the font in the gc */
xcb_change_gc(xcb_connection, statusline_ctx, XCB_GC_FONT, (uint32_t[]){ font.id });
xcb_flush(xcb_connection);
@ -936,25 +855,6 @@ void init_xcb_late(char *fontname) {
ev_io_start(main_loop, xkb_io);
XFlush(xkb_dpy);
}
/* Now we save the font-infos */
font_info = xcb_query_font_reply(xcb_connection,
query_font_cookie,
NULL);
if (xcb_request_failed(open_font_cookie, "Could not open font")) {
exit(EXIT_FAILURE);
}
font_height = font_info->font_ascent + font_info->font_descent;
if (xcb_query_font_char_infos_length(font_info) == 0) {
font_table = NULL;
} else {
font_table = xcb_query_font_char_infos(font_info);
}
DLOG("Calculated Font-height: %d\n", font_height);
}
/*
@ -1084,7 +984,6 @@ void clean_xcb() {
FREE(xcb_chk);
FREE(xcb_prep);
FREE(xcb_io);
FREE(font_info);
}
/*
@ -1137,7 +1036,7 @@ void realloc_sl_buffer() {
xcb_screen->height_in_pixels);
uint32_t mask = XCB_GC_FOREGROUND;
uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, font.id };
xcb_free_gc(xcb_connection, statusline_clear);
statusline_clear = xcb_generate_id(xcb_connection);
xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
@ -1207,8 +1106,8 @@ void reconfig_windows() {
xcb_screen->root_depth,
walk->bar,
xcb_root,
walk->rect.x, walk->rect.y + walk->rect.h - font_height - 6,
walk->rect.w, font_height + 6,
walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
walk->rect.w, font.height + 6,
1,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
xcb_screen->root_visual,
@ -1282,12 +1181,12 @@ void reconfig_windows() {
case POS_NONE:
break;
case POS_TOP:
strut_partial.top = font_height + 6;
strut_partial.top = font.height + 6;
strut_partial.top_start_x = walk->rect.x;
strut_partial.top_end_x = walk->rect.x + walk->rect.w;
break;
case POS_BOT:
strut_partial.bottom = font_height + 6;
strut_partial.bottom = font.height + 6;
strut_partial.bottom_start_x = walk->rect.x;
strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
break;
@ -1305,7 +1204,7 @@ void reconfig_windows() {
* with which we draw to them) */
walk->bargc = xcb_generate_id(xcb_connection);
mask = XCB_GC_FONT;
values[0] = xcb_font;
values[0] = font.id;
xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
walk->bargc,
walk->bar,
@ -1343,9 +1242,9 @@ void reconfig_windows() {
XCB_CONFIG_WINDOW_HEIGHT |
XCB_CONFIG_WINDOW_STACK_MODE;
values[0] = walk->rect.x;
values[1] = walk->rect.y + walk->rect.h - font_height - 6;
values[1] = walk->rect.y + walk->rect.h - font.height - 6;
values[2] = walk->rect.w;
values[3] = font_height + 6;
values[3] = font.height + 6;
values[4] = XCB_STACK_MODE_ABOVE;
DLOG("Destroying buffer for output %s", walk->name);
@ -1401,7 +1300,7 @@ void draw_bars() {
outputs_walk->bargc,
XCB_GC_FOREGROUND,
&color);
xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
xcb_poly_fill_rectangle(xcb_connection,
outputs_walk->buffer,
outputs_walk->bargc,
@ -1422,7 +1321,7 @@ void draw_bars() {
/* We assume the tray icons are quadratic (we use the font
* *height* as *width* of the icons) because we configured them
* like this. */
traypx += font_height + 2;
traypx += font.height + 2;
}
/* Add 2px of padding if there are any tray icons */
if (traypx > 0)
@ -1433,7 +1332,7 @@ void draw_bars() {
outputs_walk->bargc,
MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font_height);
MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
}
if (config.disable_ws) {
@ -1467,7 +1366,7 @@ void draw_bars() {
outputs_walk->bargc,
mask,
vals);
xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 4 };
xcb_poly_fill_rectangle(xcb_connection,
outputs_walk->buffer,
outputs_walk->bargc,
@ -1477,12 +1376,8 @@ void draw_bars() {
outputs_walk->bargc,
XCB_GC_FOREGROUND,
&fg_color);
xcb_image_text_16(xcb_connection,
ws_walk->name_glyphs,
outputs_walk->buffer,
outputs_walk->bargc,
i + 5, font_info->font_ascent + 2,
ws_walk->ucs2_name);
draw_text((char*)ws_walk->ucs2_name, ws_walk->name_glyphs, true,
outputs_walk->buffer, outputs_walk->bargc, i + 5, 2);
i += 10 + ws_walk->name_width;
}

View File

@ -27,10 +27,17 @@ typedef struct Font i3Font;
*
*/
struct Font {
/** The height of the font, built from font_ascent + font_descent */
int height;
/** The xcb-id for the font */
xcb_font_t id;
/** Font information gathered from the server */
xcb_query_font_reply_t *info;
/** Font table for this font (may be NULL) */
xcb_charinfo_t *table;
/** The height of the font, built from font_ascent + font_descent */
int height;
};
/* Since this file also gets included by utilities which dont use the i3 log
@ -195,4 +202,27 @@ char *convert_ucs2_to_utf8(xcb_char2b_t *text, size_t num_glyphs);
*/
xcb_char2b_t *convert_utf8_to_ucs2(char *input, int *real_strlen);
/**
* Defines the font to be used for the forthcoming draw_text and
* predict_text_width calls.
*
*/
void set_font(i3Font *font);
/**
* Draws text onto the specified X drawable (normally a pixmap) at the
* specified coordinates (from the top left corner of the leftmost, uppermost
* glyph) and using the provided gc. Text can be specified as UCS-2 or UTF-8.
*
*/
void draw_text(char *text, size_t text_len, bool is_ucs2,
xcb_drawable_t drawable, xcb_gcontext_t gc, int x, int y);
/**
* Predict the text width in pixels for the given text. Text can be specified
* as UCS-2 or UTF-8.
*
*/
int predict_text_width(char *text, size_t text_len, bool is_ucs2);
#endif

View File

@ -94,13 +94,6 @@ void send_take_focus(xcb_window_t window);
*/
void xcb_raise_window(xcb_connection_t *conn, xcb_window_t window);
/**
* 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(const xcb_char2b_t *text, int length);
/**
* Configures the given window to have the size/position specified by given rect
*

230
libi3/font.c Normal file
View File

@ -0,0 +1,230 @@
/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
*/
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <err.h>
#include "libi3.h"
extern xcb_connection_t *conn;
static const i3Font *savedFont = NULL;
/*
* Loads a font for usage, also getting its metrics. If fallback is true,
* the fonts 'fixed' or '-misc-*' will be loaded instead of exiting.
*
*/
i3Font load_font(const char *pattern, bool fallback) {
i3Font font;
/* Send all our requests first */
font.id = xcb_generate_id(conn);
xcb_void_cookie_t font_cookie = xcb_open_font_checked(conn, font.id,
strlen(pattern), pattern);
xcb_query_font_cookie_t info_cookie = xcb_query_font(conn, font.id);
/* Check for errors. If errors, fall back to default font. */
xcb_generic_error_t *error;
error = xcb_request_check(conn, font_cookie);
/* If we fail to open font, fall back to 'fixed' */
if (fallback && error != NULL) {
ELOG("Could not open font %s (X error %d). Trying fallback to 'fixed'.\n",
pattern, error->error_code);
pattern = "fixed";
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
info_cookie = xcb_query_font(conn, font.id);
/* Check if we managed to open 'fixed' */
error = xcb_request_check(conn, font_cookie);
/* Fall back to '-misc-*' if opening 'fixed' fails. */
if (error != NULL) {
ELOG("Could not open fallback font 'fixed', trying with '-misc-*'.\n");
pattern = "-misc-*";
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
info_cookie = xcb_query_font(conn, font.id);
if ((error = xcb_request_check(conn, font_cookie)) != NULL)
errx(EXIT_FAILURE, "Could open neither requested font nor fallbacks "
"(fixed or -misc-*): X11 error %d", error->error_code);
}
}
/* Get information (height/name) for this font */
if (!(font.info = xcb_query_font_reply(conn, info_cookie, NULL)))
errx(EXIT_FAILURE, "Could not load font \"%s\"", pattern);
/* Get the font table, if possible */
font.table = xcb_query_font_char_infos(font.info);
/* Calculate the font height */
font.height = font.info->font_ascent + font.info->font_descent;
return font;
}
/*
* Defines the font to be used for the forthcoming draw_text and
* predict_text_width calls.
*
*/
void set_font(i3Font *font) {
savedFont = font;
}
/*
* Draws text onto the specified X drawable (normally a pixmap) at the
* specified coordinates (from the top left corner of the leftmost, uppermost
* glyph) and using the provided gc. Text can be specified as UCS-2 or UTF-8.
*
*/
void draw_text(char *text, size_t text_len, bool is_ucs2,
xcb_drawable_t drawable, xcb_gcontext_t gc, int x, int y) {
assert(savedFont != NULL);
assert(text_len != 0);
/* X11 coordinates for fonts start at the baseline */
int pos_y = y + savedFont->info->font_ascent;
/* As an optimization, check if we can bypass conversion */
if (!is_ucs2 && text_len <= 255) {
xcb_image_text_8(conn, text_len, drawable, gc, x, pos_y, text);
return;
}
/* Convert the text into UCS-2 so we can do basic pointer math */
char *input;
if (is_ucs2) {
input = text;
}
else {
int real_strlen;
input = (char*)convert_utf8_to_ucs2(text, &real_strlen);
text_len = real_strlen;
}
/* The X11 protocol limits text drawing to 255 chars, so we may need
* multiple calls */
int pos_x = x;
int offset = 0;
for (;;) {
/* Calculate the size of this chunk */
int chunk_size = text_len > 255 ? 255 : text_len;
xcb_char2b_t *chunk = (xcb_char2b_t*)input + offset;
/* Draw it */
xcb_image_text_16(conn, chunk_size, drawable, gc, pos_x, pos_y, chunk);
/* Advance the offset and length of the text to draw */
offset += chunk_size;
text_len -= chunk_size;
/* Check if we're done */
if (text_len == 0)
break;
/* Advance pos_x based on the predicted text width */
pos_x += predict_text_width((char*)chunk, chunk_size, true);
}
/* If we had to convert, free the converted string */
if (!is_ucs2)
free(input);
}
static int xcb_query_text_width(xcb_char2b_t *text, size_t text_len) {
/* Make the user know we're using the slow path */
static bool first = true;
if (first) {
fprintf(stderr, "Using slow code path for text extents\n");
first = false;
}
/* Query the text width */
xcb_generic_error_t *error;
xcb_query_text_extents_cookie_t cookie = xcb_query_text_extents(conn,
savedFont->id, text_len, (xcb_char2b_t*)text);
xcb_query_text_extents_reply_t *reply = xcb_query_text_extents_reply(conn,
cookie, &error);
if (reply == NULL) {
/* We return a safe estimate because a rendering error is better than
* a crash. Plus, the user will see the error in his log. */
fprintf(stderr, "Could not get text extents (X error code %d)\n",
error->error_code);
return savedFont->info->max_bounds.character_width * text_len;
}
int width = reply->overall_width;
free(reply);
return width;
}
/*
* Predict the text width in pixels for the given text. Text can be specified
* as UCS-2 or UTF-8.
*
*/
int predict_text_width(char *text, size_t text_len, bool is_ucs2) {
/* Convert the text into UTF-16 so we can do basic pointer math */
xcb_char2b_t *input;
if (is_ucs2) {
input = (xcb_char2b_t *)text;
}
else {
int real_strlen;
input = convert_utf8_to_ucs2(text, &real_strlen);
text_len = real_strlen;
}
int width;
if (savedFont->table == NULL) {
/* If we don't have a font table, fall back to querying the server */
width = xcb_query_text_width(input, text_len);
}
else {
/* Save some pointers for convenience */
xcb_query_font_reply_t *font_info = savedFont->info;
xcb_charinfo_t *font_table = savedFont->table;
/* Calculate the width using the font table */
width = 0;
for (size_t i = 0; i < text_len; i++) {
xcb_charinfo_t *info;
int row = input[i].byte1;
int col = input[i].byte2;
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) {
continue;
}
/* Don't you ask me, how this one works… (Merovius) */
info = &font_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 (info->character_width != 0 ||
(info->right_side_bearing |
info->left_side_bearing |
info->ascent |
info->descent) != 0) {
width += info->character_width;
}
}
}
/* If we had to convert, free the converted string */
if (!is_ucs2)
free(input);
return width;
}

View File

@ -1,71 +0,0 @@
/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <err.h>
#include "libi3.h"
extern xcb_connection_t *conn;
/*
* Loads a font for usage, also getting its height. If fallback is true,
* the fonts 'fixed' or '-misc-*' will be loaded instead of exiting.
*
*/
i3Font load_font(const char *pattern, bool fallback) {
i3Font font;
xcb_void_cookie_t font_cookie;
xcb_list_fonts_with_info_cookie_t info_cookie;
xcb_list_fonts_with_info_reply_t *info_reply;
xcb_generic_error_t *error;
/* Send all our requests first */
font.id = xcb_generate_id(conn);
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
/* Check for errors. If errors, fall back to default font. */
error = xcb_request_check(conn, font_cookie);
/* If we fail to open font, fall back to 'fixed' */
if (fallback && error != NULL) {
ELOG("Could not open font %s (X error %d). Trying fallback to 'fixed'.\n",
pattern, error->error_code);
pattern = "fixed";
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
/* Check if we managed to open 'fixed' */
error = xcb_request_check(conn, font_cookie);
/* Fall back to '-misc-*' if opening 'fixed' fails. */
if (error != NULL) {
ELOG("Could not open fallback font 'fixed', trying with '-misc-*'.\n");
pattern = "-misc-*";
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern);
info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
if ((error = xcb_request_check(conn, font_cookie)) != NULL)
errx(EXIT_FAILURE, "Could open neither requested font nor fallbacks "
"(fixed or -misc-*): X11 error %d", error->error_code);
}
}
/* Get information (height/name) for this font */
if (!(info_reply = xcb_list_fonts_with_info_reply(conn, info_cookie, NULL)))
errx(EXIT_FAILURE, "Could not load font \"%s\"", pattern);
font.height = info_reply->font_ascent + info_reply->font_descent;
free(info_reply);
return font;
}

View File

@ -1546,6 +1546,7 @@ font:
TOKFONT STR
{
config.font = load_font($2, true);
set_font(&config.font);
printf("font %s\n", $2);
FREE(font_pattern);
font_pattern = $2;

View File

@ -371,6 +371,7 @@ void load_configuration(xcb_connection_t *conn, const char *override_configpath,
if (config.font.id == 0) {
ELOG("You did not specify required configuration option \"font\"\n");
config.font = load_font("fixed", true);
set_font(&config.font);
}
#if 0

View File

@ -152,7 +152,7 @@ void handle_signal(int sig, siginfo_t *info, void *data) {
/* calculate width for longest text */
int text_len = strlen(crash_text[crash_text_longest]);
xcb_char2b_t *longest_text = convert_utf8_to_ucs2(crash_text[crash_text_longest], &text_len);
int font_width = predict_text_width(longest_text, text_len);
int font_width = predict_text_width((char *)longest_text, text_len, true);
int width = font_width + 20;
/* Open a popup window on each virtual screen */

View File

@ -130,32 +130,6 @@ void xcb_raise_window(xcb_connection_t *conn, xcb_window_t window) {
xcb_configure_window(conn, window, XCB_CONFIG_WINDOW_STACK_MODE, values);
}
/*
* Query 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(const xcb_char2b_t *text, int length) {
xcb_query_text_extents_cookie_t cookie;
xcb_query_text_extents_reply_t *reply;
xcb_generic_error_t *error;
int width;
cookie = xcb_query_text_extents(conn, config.font.id, length, text);
if ((reply = xcb_query_text_extents_reply(conn, cookie, &error)) == NULL) {
ELOG("Could not get text extents (X error code %d)\n",
error->error_code);
/* We return the rather safe guess of 7 pixels, because a
* rendering error is better than a crash. Plus, the user will
* see the error in his log. */
return 7;
}
width = reply->overall_width;
free(reply);
return width;
}
/*
* Configures the given window to have the size/position specified by given rect
*