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/*
* render_cairo_common.c
*
* Copyright © 2019 Thomas White <taw@bitwiz.org.uk>
*
* This file is part of Colloquium.
*
* Colloquium is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdio.h>
#include <pango/pango.h>
#include "storycode.h"
int runs_to_pangolayout(PangoLayout *layout, struct text_run *runs, int n_runs)
{
size_t total_len = 0;
int i;
char *text;
PangoAttrList *attrs;
attrs = pango_layout_get_attributes(layout);
/* Work out length of all text in item (paragraph) */
for ( i=0; i<n_runs; i++ ) {
total_len += strlen(runs[i].text);
}
/* Allocate the complete text */
text = malloc(total_len+1);
if ( text == NULL ) {
fprintf(stderr, "Couldn't allocate combined text (%lli)\n",
(long long int)total_len);
return 1;
}
/* Put all of the text together */
text[0] = '\0';
size_t pos = 0;
for ( i=0; i<n_runs; i++ ) {
PangoAttribute *attr = NULL;
size_t run_len = strlen(runs[i].text);
switch ( runs[i].type ) {
case TEXT_RUN_NORMAL :
break;
case TEXT_RUN_BOLD:
attr = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
break;
case TEXT_RUN_ITALIC:
attr = pango_attr_style_new(PANGO_STYLE_ITALIC);
break;
case TEXT_RUN_UNDERLINE:
attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
break;
}
if ( attr != NULL ) {
attr->start_index = pos;
attr->end_index = pos + run_len;
pango_attr_list_insert(attrs, attr);
}
/* FIXME: Should check that each bit of text finishes on a character boundary */
pos += run_len;
strcat(text, runs[i].text);
}
pango_layout_set_text(layout, text, -1);
return 0;
}
PangoAlignment to_pangoalignment(enum alignment align)
{
switch ( align ) {
case ALIGN_LEFT : return PANGO_ALIGN_LEFT;
case ALIGN_RIGHT : return PANGO_ALIGN_RIGHT;
case ALIGN_CENTER : return PANGO_ALIGN_CENTER;
default: return PANGO_ALIGN_LEFT;
}
}
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