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/*
* frame.c
*
* Copyright © 2013 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 <assert.h>
#include <stdlib.h>
#include <string.h>
#include "sc_parse.h"
#include "frame.h"
static int alloc_ro(struct frame *fr)
{
struct frame **new_ro;
new_ro = realloc(fr->children,
fr->max_children*sizeof(struct frame *));
if ( new_ro == NULL ) return 1;
fr->children = new_ro;
return 0;
}
struct frame *frame_new()
{
struct frame *n;
n = calloc(1, sizeof(struct frame));
if ( n == NULL ) return NULL;
n->children = NULL;
n->max_children = 32;
alloc_ro(n);
n->num_children = 0;
n->sc = NULL;
return n;
}
struct frame *add_subframe(struct frame *fr)
{
struct frame *n;
n = frame_new();
if ( n == NULL ) return NULL;
if ( fr->num_children == fr->max_children ) {
fr->max_children += 32;
if ( alloc_ro(fr) ) return NULL;
}
fr->children[fr->num_children++] = n;
return n;
}
static LengthUnits get_units(const char *t)
{
size_t len = strlen(t);
if ( t[len-1] == 'f' ) return UNITS_FRAC;
if ( t[len-1] == 'u' ) return UNITS_SLIDE;
fprintf(stderr, "Invalid units in '%s'\n", t);
return UNITS_SLIDE;
}
static void parse_option(struct frame *fr, const char *opt, StyleSheet *ss)
{
if ( (index(opt, 'x') != NULL) && (index(opt, '+') != NULL)
&& (index(opt, '+') != rindex(opt, '+')) )
{
char *w;
char *h;
char *x;
char *y;
char *check;
/* Looks like a dimension/position thing */
w = strdup(opt);
h = index(w, 'x');
h[0] = '\0'; h++;
x = index(h, '+');
if ( x == NULL ) {
fprintf(stderr, "Invalid option '%s'\n", opt);
return;
}
x[0] = '\0'; x++;
y = index(x, '+');
if ( x == NULL ) {
fprintf(stderr, "Invalid option '%s'\n", opt);
return;
}
y[0] = '\0'; y++;
fr->lop.w = strtod(w, &check);
if ( check == w ) {
fprintf(stderr, "Invalid option '%s'\n", opt);
return;
}
fr->lop.w_units = get_units(w);
fr->lop.h = strtod(h, &check);
if ( check == h ) {
fprintf(stderr, "Invalid option '%s'\n", opt);
return;
}
fr->lop.h_units = get_units(h);
fr->lop.x = strtod(x, &check);
if ( check == x ) {
fprintf(stderr, "Invalid option '%s'\n", opt);
return;
}
fr->lop.y = strtod(y, &check);
if ( check == y ) {
fprintf(stderr, "Invalid option '%s'\n", opt);
return;
}
}
if ( strncmp(opt, "style=", 6) == 0 ) {
char *s;
char *tmp;
tmp = strdup(opt);
if ( opt[strlen(opt)-1] == '*' ) {
fr->lop_from_style = 1;
tmp[strlen(tmp)-1] = '\0';
} else {
fr->lop_from_style = 0;
}
s = index(tmp, '=') + 1;
fr->style = lookup_style(ss, s);
free(tmp);
if ( fr->style == NULL ) {
fprintf(stderr, "Invalid style '%s'\n", opt);
return;
}
}
}
static void parse_options(struct frame *fr, const char *opth, StyleSheet *ss)
{
int i;
size_t len;
size_t start;
char *opt;
if ( opth == NULL ) return;
opt = strdup(opth);
len = strlen(opt);
start = 0;
for ( i=0; i<len; i++ ) {
/* FIXME: comma might be escaped or quoted */
if ( opt[i] == ',' ) {
opt[i] = '\0';
parse_option(fr, opt+start, ss);
start = i+1;
}
}
if ( start != len ) {
parse_option(fr, opt+start, ss);
}
free(opt);
}
static int recursive_unpack(struct frame *fr, const char *sc, StyleSheet *ss)
{
SCBlockList *bl;
SCBlockListIterator *iter;
struct scblock *b;
bl = sc_find_blocks(sc, "f");
if ( bl == NULL ) return 1;
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->empty = 0;
parse_options(sfr, b->options, ss);
if ( sfr->lop.w < 0.0 ) {
sfr->lop.x += sfr->lop.w;
sfr->lop.w = -sfr->lop.w;
}
if ( sfr->lop.h < 0.0 ) {
sfr->lop.y += sfr->lop.h;
sfr->lop.h = -sfr->lop.h;
}
sfr->sc = remove_blocks(b->contents, "f");
sfr->sc_len = strlen(sfr->sc)+1;
if ( recursive_unpack(sfr, b->contents, ss) ) {
sc_block_list_free(bl);
return 1;
}
}
sc_block_list_free(bl);
return 0;
}
/* Unpack level 2 StoryCode (content + subframes) into frames */
struct frame *sc_unpack(const char *sc, StyleSheet *ss)
{
struct frame *fr;
fr = frame_new();
if ( fr == NULL ) return NULL;
fr->empty = 0;
fr->sc = remove_blocks(sc, "f");
if ( recursive_unpack(fr, sc, ss) ) {
return NULL;
}
return fr;
}
void show_hierarchy(struct frame *fr, const char *t)
{
int i;
char tn[1024];
char *sc;
strcpy(tn, t);
strcat(tn, " ");
sc = escape_text(fr->sc);
printf("%s%p %s (%.2f x %.2f)\n", t, fr, sc, fr->w, fr->h);
free(sc);
for ( i=0; i<fr->num_children; i++ ) {
show_hierarchy(fr->children[i], tn);
}
}
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