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/*
* presentation.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 <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include <gio/gio.h>
#ifdef HAVE_PANGO
#include <pango/pango.h>
#endif
#include "presentation.h"
#include "stylesheet.h"
#include "slide.h"
#include "narrative.h"
#include "imagestore.h"
#include "storycode.h"
struct _presentation
{
Stylesheet *stylesheet;
Narrative *narrative;
ImageStore *imagestore;
int n_slides;
Slide **slides;
int max_slides;
int saved;
const char *language;
};
Presentation *presentation_new()
{
Presentation *p;
p = malloc(sizeof(*p));
if ( p == NULL ) return NULL;
p->stylesheet = NULL;
p->narrative = NULL;
p->slides = NULL;
p->n_slides = 0;
p->max_slides = 0;
p->imagestore = NULL;
p->saved = 1;
#ifdef HAVE_PANGO
p->language = pango_language_to_string(pango_language_get_default());
#else
p->language = NULL;
#endif
return p;
}
Presentation *presentation_load(GFile *file)
{
GBytes *bytes;
const char *text;
size_t len;
Presentation *p;
bytes = g_file_load_bytes(file, NULL, NULL, NULL);
if ( bytes == NULL ) return NULL;
text = g_bytes_get_data(bytes, &len);
p = storycode_parse_presentation(text);
g_bytes_unref(bytes);
if ( p == NULL ) return NULL;
p->imagestore = imagestore_new("."); /* FIXME: From app config */
imagestore_set_parent(p->imagestore, g_file_get_parent(file));
return p;
}
int presentation_save(Presentation *p, GFile *file)
{
/* FIXME: Implementation */
return 1;
}
void presentation_set_unsaved(Presentation *p)
{
p->saved = 0;
}
int presentation_get_unsaved(Presentation *p)
{
return !p->saved;
}
void presentation_free(Presentation *p)
{
/* FIXME: Free narrative, slides, imagestore */
free(p);
}
void presentation_add_stylesheet(Presentation *p, Stylesheet *ss)
{
assert(p->stylesheet == NULL);
p->stylesheet = ss;
}
void presentation_add_narrative(Presentation *p, Narrative *n)
{
assert(p->narrative == NULL);
p->narrative = n;
}
void presentation_add_slide(Presentation *p, Slide *s)
{
assert(p->n_slides <= p->max_slides);
if ( p->n_slides == p->max_slides ) {
Slide **nslides = realloc(p->slides,
(p->max_slides+8)*sizeof(Slide *));
if ( nslides == NULL ) {
fprintf(stderr, "Failed to allocate memory for slide\n");
return;
}
p->slides = nslides;
p->max_slides += 8;
}
p->slides[p->n_slides++] = s;
}
int presentation_get_num_slides(Presentation *p)
{
return p->n_slides;
}
Slide *presentation_get_slide_by_number(Presentation *p, int i)
{
if ( i >= p->n_slides ) return NULL;
if ( i < 0 ) return NULL;
return p->slides[i];
}
signed int presentation_get_slide_number(Presentation *p, Slide *s)
{
int i;
if ( p == NULL ) return -1;
for ( i=0; i<p->n_slides; i++ ) {
if ( s == p->slides[i] ) return i;
}
return -1;
}
Stylesheet *presentation_get_stylesheet(Presentation *p)
{
if ( p == NULL ) return NULL;
return p->stylesheet;
}
Narrative *presentation_get_narrative(Presentation *p)
{
if ( p == NULL ) return NULL;
return p->narrative;
}
const char *presentation_get_language(Presentation *p)
{
if ( p == NULL ) return NULL;
return p->language;
}
ImageStore *presentation_get_imagestore(Presentation *p)
{
if ( p == NULL ) return NULL;
return p->imagestore;
}
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