789a877b37
The characters & < > ' " needs to be escaped when using pango markup Signed-off-by: Heghedus Razvan <heghedus.razvan@gmail.com>
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
#include <cairo/cairo.h>
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#include <pango/pangocairo.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "log.h"
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int escape_markup_text(const char *src, char *dest, int dest_length) {
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int length = 0;
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while (src[0]) {
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switch (src[0]) {
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case '&':
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length += 5;
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if (dest && dest_length - length >= 0) {
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dest += sprintf(dest, "%s", "&");
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} else {
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dest_length = -1;
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}
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break;
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case '<':
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length += 4;
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if (dest && dest_length - length >= 0) {
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dest += sprintf(dest, "%s", "<");
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} else {
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dest_length = -1;
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}
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break;
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case '>':
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length += 4;
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if (dest && dest_length - length >= 0) {
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dest += sprintf(dest, "%s", ">");
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} else {
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dest_length = -1;
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}
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break;
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case '\'':
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length += 6;
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if (dest && dest_length - length >= 0) {
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dest += sprintf(dest, "%s", "'");
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} else {
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dest_length = -1;
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}
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break;
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case '"':
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length += 6;
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if (dest && dest_length - length >= 0) {
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dest += sprintf(dest, "%s", """);
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} else {
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dest_length = -1;
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}
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break;
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default:
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length += 1;
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if (dest && dest_length - length >= 0) {
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*(dest++) = *src;
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} else {
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dest_length = -1;
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}
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}
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src++;
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}
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// if we could not fit the escaped string in dest, return -1
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if (dest && dest_length == -1) {
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return -1;
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}
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return length;
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}
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PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
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const char *text, int32_t scale, bool markup) {
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PangoLayout *layout = pango_cairo_create_layout(cairo);
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PangoAttrList *attrs;
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if (markup) {
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char *buf;
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GError *error = NULL;
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bool result = pango_parse_markup(text, -1, 0, &attrs, &buf,
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NULL, &error);
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if (result) {
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wlr_log(L_ERROR, "pango_parse_markup '%s' -> error %s", text,
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error->message);
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return NULL;
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}
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pango_layout_set_markup(layout, text, -1);
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free(buf);
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} else {
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attrs = pango_attr_list_new();
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pango_layout_set_text(layout, text, -1);
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}
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pango_attr_list_insert(attrs, pango_attr_scale_new(scale));
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PangoFontDescription *desc = pango_font_description_from_string(font);
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pango_layout_set_font_description(layout, desc);
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pango_layout_set_single_paragraph_mode(layout, 1);
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pango_layout_set_attributes(layout, attrs);
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pango_attr_list_unref(attrs);
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pango_font_description_free(desc);
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return layout;
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}
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void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
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int32_t scale, bool markup, const char *fmt, ...) {
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static char buf[2048];
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va_list args;
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va_start(args, fmt);
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if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
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strcpy(buf, "[buffer overflow]");
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}
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va_end(args);
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PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
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pango_cairo_update_layout(cairo, layout);
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pango_layout_get_pixel_size(layout, width, height);
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g_object_unref(layout);
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}
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void pango_printf(cairo_t *cairo, const char *font,
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int32_t scale, bool markup, const char *fmt, ...) {
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static char buf[2048];
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va_list args;
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va_start(args, fmt);
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if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
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strcpy(buf, "[buffer overflow]");
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}
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va_end(args);
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PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
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pango_cairo_update_layout(cairo, layout);
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pango_cairo_show_layout(cairo, layout);
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g_object_unref(layout);
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}
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