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Fixes CJK wide character display

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By jumping two columns when wide character prints,
and draw wide background under wide character.
This commit is contained in:
Peng Wu
2013-08-19 10:59:21 +08:00
committed by Kristian Høgsberg
parent 1084da506e
commit cfcc111070
1 changed files with 30 additions and 2 deletions
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clients/terminal.c
+30 -2
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@@ -20,6 +20,8 @@
* OF THIS SOFTWARE.
*/
#define _XOPEN_SOURCE 700 /* for strnlen, snprintf and wcwidth */
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
@@ -33,6 +35,8 @@
#include <ctype.h>
#include <cairo.h>
#include <sys/epoll.h>
#include <wchar.h>
#include <locale.h>
#include <wayland-client.h>
@@ -218,6 +222,13 @@ get_unicode(union utf8_char utf8)
return machine.unicode;
}
static bool
is_wide(union utf8_char utf8)
{
uint32_t unichar = get_unicode(utf8);
return wcwidth(unichar) > 1;
}
struct char_sub {
union utf8_char match;
union utf8_char replace;
@@ -876,6 +887,8 @@ terminal_send_selection(struct terminal *terminal, int fd)
for (row = 0; row < terminal->height; row++) {
p_row = terminal_get_row(terminal, row);
for (col = 0; col < terminal->width; col++) {
if (p_row[col].ch == 0x200B) /* space glyph */
continue;
/* get the attributes for this character cell */
terminal_decode_attr(terminal, row, col, &attr);
if (!attr.attr.s)
@@ -972,6 +985,7 @@ redraw_handler(struct widget *widget, void *data)
struct glyph_run run;
cairo_font_extents_t extents;
double average_width;
double unichar_width;
surface = window_get_surface(terminal->window);
widget_get_allocation(terminal->widget, &allocation);
@@ -997,6 +1011,7 @@ redraw_handler(struct widget *widget, void *data)
allocation.y + top_margin);
/* paint the background */
for (row = 0; row < terminal->height; row++) {
p_row = terminal_get_row(terminal, row);
for (col = 0; col < terminal->width; col++) {
/* get the attributes for this character cell */
terminal_decode_attr(terminal, row, col, &attr);
@@ -1004,12 +1019,17 @@ redraw_handler(struct widget *widget, void *data)
if (attr.attr.bg == terminal->color_scheme->border)
continue;
if (is_wide(p_row[col]))
unichar_width = 2 * average_width;
else
unichar_width = average_width;
terminal_set_color(terminal, cr, attr.attr.bg);
cairo_move_to(cr, col * average_width,
row * extents.height);
cairo_rel_line_to(cr, average_width, 0);
cairo_rel_line_to(cr, unichar_width, 0);
cairo_rel_line_to(cr, 0, extents.height);
cairo_rel_line_to(cr, -average_width, 0);
cairo_rel_line_to(cr, -unichar_width, 0);
cairo_close_path(cr);
cairo_fill(cr);
}
@@ -1901,6 +1921,10 @@ handle_char(struct terminal *terminal, union utf8_char utf8)
row[terminal->column] = utf8;
attr_row[terminal->column++] = terminal->curr_attr;
/* cursor jump for wide character. */
if (is_wide(utf8))
row[terminal->column++].ch = 0x200B; /* space glyph */
if (utf8.ch != terminal->last_char.ch)
terminal->last_char = utf8;
}
@@ -2737,6 +2761,10 @@ int main(int argc, char *argv[])
struct terminal *terminal;
int config_fd;
/* as wcwidth is locale-dependent,
wcwidth needs setlocale call to function properly. */
setlocale(LC_ALL, "");
option_shell = getenv("SHELL");
if (!option_shell)
option_shell = "/bin/bash";