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/*
* loadsave.v
*
* 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 <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "presentation.h"
#include "objects.h"
#include "stylesheet.h"
struct serializer
{
FILE *fh;
char *stack[32];
int stack_depth;
char *prefix;
int empty_set;
int blank_written;
};
int load_presentation(struct presentation *p, const char *filename)
{
return 0;
}
static const char *type_text(enum objtype t)
{
switch ( t )
{
case TEXT : return "text";
default : return "unknown";
}
}
static void rebuild_prefix(struct serializer *ser)
{
int i;
size_t sz = 1; /* Space for terminator */
for ( i=0; i<ser->stack_depth; i++ ) {
sz += strlen(ser->stack[i]) + 1;
}
free(ser->prefix);
ser->prefix = malloc(sz);
if ( ser->prefix == NULL ) return; /* Probably bad! */
ser->prefix[0] = '\0';
for ( i=0; i<ser->stack_depth; i++ ) {
if ( i != 0 ) strcat(ser->prefix, "/");
strcat(ser->prefix, ser->stack[i]);
}
}
void serialize_start(struct serializer *ser, const char *id)
{
ser->stack[ser->stack_depth++] = strdup(id);
rebuild_prefix(ser);
ser->empty_set = 1;
}
static void check_prefix_output(struct serializer *ser)
{
if ( ser->empty_set ) {
ser->empty_set = 0;
fprintf(ser->fh, "\n");
fprintf(ser->fh, "[%s]\n", ser->prefix);
}
}
void serialize_s(struct serializer *ser, const char *key, const char *val)
{
check_prefix_output(ser);
fprintf(ser->fh, "%s = \"%s\"\n", key, val);
}
void serialize_f(struct serializer *ser, const char *key, double val)
{
check_prefix_output(ser);
fprintf(ser->fh, "%s = %.2ff\n", key, val);
}
void serialize_b(struct serializer *ser, const char *key, int val)
{
check_prefix_output(ser);
fprintf(ser->fh, "%s = %i\n", key, val);
}
void serialize_end(struct serializer *ser)
{
free(ser->stack[--ser->stack_depth]);
rebuild_prefix(ser);
}
int save_presentation(struct presentation *p, const char *filename)
{
FILE *fh;
int i;
struct serializer ser;
fh = fopen(filename, "w");
if ( fh == NULL ) return 1;
/* Set up the serializer */
ser.fh = fh;
ser.stack_depth = 0;
ser.prefix = NULL;
fprintf(fh, "# Colloquium presentation file\n");
serialize_f(&ser, "version", 0.1);
serialize_start(&ser, "slide-properties");
serialize_f(&ser, "width", p->slide_width);
serialize_f(&ser, "height", p->slide_height);
serialize_end(&ser);
serialize_start(&ser, "stylesheet");
write_stylesheet(p->ss, &ser);
serialize_end(&ser);
serialize_start(&ser, "slides");
for ( i=0; i<p->num_slides; i++ ) {
int j;
struct slide *s;
char s_id[32];
s = p->slides[i];
snprintf(s_id, 31, "%i", i);
serialize_start(&ser, s_id);
for ( j=0; j<s->num_objects; j++ ) {
struct object *o = s->objects[j];
char o_id[32];
if ( o->empty ) continue;
snprintf(o_id, 31, "%i", j);
serialize_start(&ser, o_id);
serialize_s(&ser, "type", type_text(o->type));
//o->serialize(o, &ser);
serialize_end(&ser);
}
serialize_end(&ser);
}
serialize_end(&ser);
fclose(fh);
return 0;
}
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