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/*
* presentation.c
*
* Colloquium - A tiny presentation program
*
* Copyright (c) 2011 Thomas White <taw@bitwiz.org.uk>
*
* This program 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 "presentation.h"
#include "slide_render.h"
#include "objects.h"
#include "stylesheet.h"
struct slide *add_slide(struct presentation *p, int pos)
{
struct slide **try;
struct slide *new;
int i;
new = malloc(sizeof(struct slide));
if ( new == NULL ) return NULL;
/* No objects to start with */
new->num_objects = 0;
new->object_seq = 0;
new->objects = NULL;
new->slide_width = p->slide_width;
new->slide_height = p->slide_height;
new->render_cache_seq = 0;
new->render_cache = NULL;
render_slide(new); /* Render nothing, just to make the surface exist */
try = realloc(p->slides, (1+p->num_slides)*sizeof(struct slide *));
if ( try == NULL ) {
free(new);
return NULL;
}
p->slides = try;
if ( (p->num_slides>1) && (pos<p->num_slides-1) ) {
for ( i=p->num_slides; i>pos+1; i-- ) {
p->slides[i] = p->slides[i-1];
}
p->slides[pos+1] = new;
} else if ( pos == p->num_slides-1 ) {
p->slides[pos+1] = new;
} else {
assert(pos == 0);
p->slides[pos] = new;
}
p->num_slides++;
return new;
}
int add_object_to_slide(struct slide *s, struct object *o)
{
struct object **try;
try = realloc(s->objects, (1+s->num_objects)*sizeof(struct object *));
if ( try == NULL ) return 1;
s->objects = try;
s->objects[s->num_objects++] = o;
o->parent = s;
return 0;
}
void remove_object_from_slide(struct slide *s, struct object *o)
{
int i;
int found = 0;
for ( i=0; i<s->num_objects; i++ ) {
if ( s->objects[i] == o ) {
assert(!found);
found = 1;
}
if ( found ) {
if ( i == s->num_objects-1 ) {
s->objects[i] = NULL;
} else {
s->objects[i] = s->objects[i+1];
}
}
}
s->num_objects--;
}
struct object *find_object_at_position(struct slide *s, double x, double y)
{
int i;
struct object *o = NULL;
for ( i=0; i<s->num_objects; i++ ) {
if ( (x>s->objects[i]->x) && (y>s->objects[i]->y)
&& (x<s->objects[i]->x+s->objects[i]->bb_width)
&& (y<s->objects[i]->y+s->objects[i]->bb_height) )
{
o = s->objects[i];
}
}
return o;
}
struct presentation *new_presentation()
{
struct presentation *new;
new = calloc(1, sizeof(struct presentation));
new->titlebar = strdup("(untitled)");
new->filename = NULL;
new->window = NULL;
new->ui = NULL;
new->action_group = NULL;
new->slideshow = NULL;
new->slide_width = 1024.0;
new->slide_height = 768.0;
/* Add one blank slide and view it */
new->num_slides = 0;
new->slides = NULL;
new->view_slide = add_slide(new, 0);
new->view_slide_number = 0;
new->editing_object = NULL;
new->ss = new_stylesheet();
return new;
}
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