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#include <cairo/cairo.h>
#include <pango/pangocairo.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "log.h"
int escape_markup_text(const char *src, char *dest, int dest_length) {
int length = 0;
while (src[0]) {
switch (src[0]) {
case '&':
length += 5;
if (dest && dest_length - length >= 0) {
dest += sprintf(dest, "%s", "&");
} else {
dest_length = -1;
}
break;
case '<':
length += 4;
if (dest && dest_length - length >= 0) {
dest += sprintf(dest, "%s", "<");
} else {
dest_length = -1;
}
break;
case '>':
length += 4;
if (dest && dest_length - length >= 0) {
dest += sprintf(dest, "%s", ">");
} else {
dest_length = -1;
}
break;
case '\'':
length += 6;
if (dest && dest_length - length >= 0) {
dest += sprintf(dest, "%s", "'");
} else {
dest_length = -1;
}
break;
case '"':
length += 6;
if (dest && dest_length - length >= 0) {
dest += sprintf(dest, "%s", """);
} else {
dest_length = -1;
}
break;
default:
length += 1;
if (dest && dest_length - length >= 0) {
*(dest++) = *src;
} else {
dest_length = -1;
}
}
src++;
}
// if we could not fit the escaped string in dest, return -1
if (dest && dest_length == -1) {
return -1;
}
return length;
}
PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
const char *text, double scale, bool markup) {
PangoLayout *layout = pango_cairo_create_layout(cairo);
PangoAttrList *attrs;
if (markup) {
char *buf;
GError *error = NULL;
if (pango_parse_markup(text, -1, 0, &attrs, &buf, NULL, &error)) {
pango_layout_set_markup(layout, buf, -1);
free(buf);
} else {
wlr_log(L_ERROR, "pango_parse_markup '%s' -> error %s", text,
error->message);
g_error_free(error);
markup = false; // fallback to plain text
}
}
if (!markup) {
attrs = pango_attr_list_new();
pango_layout_set_text(layout, text, -1);
}
pango_attr_list_insert(attrs, pango_attr_scale_new(scale));
PangoFontDescription *desc = pango_font_description_from_string(font);
pango_layout_set_font_description(layout, desc);
pango_layout_set_single_paragraph_mode(layout, 1);
pango_layout_set_attributes(layout, attrs);
pango_attr_list_unref(attrs);
pango_font_description_free(desc);
return layout;
}
void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
double scale, bool markup, const char *fmt, ...) {
static char buf[2048];
va_list args;
va_start(args, fmt);
if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
strcpy(buf, "[buffer overflow]");
}
va_end(args);
PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
pango_cairo_update_layout(cairo, layout);
pango_layout_get_pixel_size(layout, width, height);
g_object_unref(layout);
}
void pango_printf(cairo_t *cairo, const char *font,
double scale, bool markup, const char *fmt, ...) {
static char buf[2048];
va_list args;
va_start(args, fmt);
if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
strcpy(buf, "[buffer overflow]");
}
va_end(args);
PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
pango_cairo_update_layout(cairo, layout);
pango_cairo_show_layout(cairo, layout);
g_object_unref(layout);
}
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