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/*
* frame.c
*
* Colloquium - A tiny presentation program
*
* Copyright (c) 2012 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 <assert.h>
#include <stdlib.h>
#include "frame.h"
static int alloc_ro(struct frame *fr)
{
struct frame **new_ro;
new_ro = realloc(fr->rendering_order,
fr->max_ro*sizeof(struct frame *));
if ( new_ro == NULL ) return 1;
fr->rendering_order = new_ro;
return 0;
}
struct frame *frame_new()
{
struct frame *n;
n = calloc(1, sizeof(struct frame));
if ( n == NULL ) return NULL;
n->rendering_order = NULL;
n->max_ro = 32;
alloc_ro(n);
n->num_ro = 1;
n->rendering_order[0] = n;
n->pl = NULL;
return n;
}
struct frame *add_subframe(struct frame *fr)
{
struct frame *n;
n = frame_new();
if ( n == NULL ) return NULL;
if ( fr->num_ro == fr->max_ro ) {
fr->max_ro += 32;
if ( alloc_ro(fr) ) return NULL;
}
fr->rendering_order[fr->num_ro++] = n;
return n;
}
static void show_heirarchy(struct frame *fr, const char *t)
{
int i;
char tn[1024];
strcpy(tn, t);
strcat(tn, " |-> ");
printf("%s%p %s\n", t, fr, fr->sc);
for ( i=0; i<fr->num_ro; i++ ) {
if ( fr->rendering_order[i] != fr ) {
show_heirarchy(fr->rendering_order[i], tn);
} else {
printf("%s<this frame>\n", tn);
}
}
}
static void recursive_unpack(struct frame *fr, const char *sc)
{
SCBlockList *bl;
SCBlockListIterator *iter;
struct scblock *b;
bl = sc_find_blocks(sc, "f");
for ( b = sc_block_list_first(bl, &iter);
b != NULL;
b = sc_block_list_next(bl, iter) )
{
struct frame *sfr;
sfr = add_subframe(fr);
sfr->sc = remove_blocks(b->contents, "f");
recursive_unpack(sfr, b->contents);
}
sc_block_list_free(bl);
}
/* Unpack level 2 StoryCode (content + subframes) into frames */
struct frame *sc_unpack(const char *sc)
{
struct frame *fr;
fr = frame_new();
if ( fr == NULL ) return NULL;
fr->sc = remove_blocks(sc, "f");
recursive_unpack(fr, sc);
show_heirarchy(fr, "");
return fr;
}
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