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/*
* objects.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 <gdk-pixbuf/gdk-pixbuf.h>
#include "presentation.h"
#include "objects.h"
#include "mainwindow.h"
struct image_store
{
int n_images;
struct image **images;
};
static struct image *add_image_to_store(struct image_store *is, char *filename)
{
struct image **images_new;
struct image *i_new;
int idx;
GError *error = NULL;
int w, h;
i_new = calloc(1, sizeof(struct image));
if ( i_new == NULL ) return NULL;
images_new = realloc(is->images,
(is->n_images+1)*sizeof(struct image *));
if ( images_new == NULL ) {
fprintf(stderr, "Couldn't allocate memory for image.\n");
return NULL;
}
is->images = images_new;
idx = is->n_images++;
gdk_pixbuf_get_file_info(filename, &w, &h);
/* FIXME: If image is huge, load a smaller version */
i_new->pb = gdk_pixbuf_new_from_file(filename, &error);
if ( i_new->pb == NULL ) {
fprintf(stderr, "Failed to load image '%s'\n", filename);
is->n_images--;
return NULL;
}
i_new->filename = strdup(filename);
i_new->refcount = 1;
i_new->width = w;
i_new->height = h;
i_new->parent = is;
is->images[idx] = i_new;
return i_new;
}
static struct image *find_filename(struct image_store *is, const char *filename)
{
int i;
for ( i=0; i<is->n_images; i++ ) {
if ( strcmp(is->images[i]->filename, filename) == 0 ) {
return is->images[i];
}
}
return NULL;
}
struct image *get_image(struct image_store *is, char *filename)
{
struct image *image;
image = find_filename(is, filename);
if ( image == NULL ) {
image = add_image_to_store(is, filename);
} else {
image->refcount++;
}
return image;
}
void unref_image(struct image *i)
{
i->refcount--;
if ( i->refcount == 0 ) {
struct image_store *is;
int j;
g_object_unref(G_OBJECT(i->pb));
free(i->filename);
is = i->parent;
free(i);
for ( j=0; j<is->n_images; j++ ) {
if ( is->images[j] == i ) {
int k;
for ( k=j+1; k<is->n_images; k++ ) {
is->images[k-1] = is->images[k];
}
break;
}
}
is->n_images--;
}
}
struct image_store *image_store_new()
{
struct image_store *is;
is = calloc(1, sizeof(*is));
if ( is == NULL ) return NULL;
is->images = NULL;
is->n_images = 0;
return is;
}
void notify_style_update(struct presentation *p, struct style *sty)
{
int i;
int changed = 0;
for ( i=0; i<p->num_slides; i++ ) {
int j;
struct slide *s;
s = p->slides[i];
for ( j=0; j<p->slides[i]->num_objects; j++ ) {
if ( s->objects[j]->style != sty ) continue;
s->objects[j]->update_object(s->objects[j]);
if ( p->cur_edit_slide == s ) changed = 1;
}
}
p->completely_empty = 0;
if ( changed ) notify_slide_changed(p); /* Trigger redraw etc */
}
void delete_object(struct object *o)
{
if ( o->parent != NULL ) remove_object_from_slide(o->parent, o);
o->delete_object(o);
free(o);
}
void realise_everything(struct presentation *p)
{
int i;
/* Realise all the tools */
p->select_tool->realise(p->select_tool, p->drawingarea, p);
p->text_tool->realise(p->text_tool, p->drawingarea, p);
p->image_tool->realise(p->image_tool, p->drawingarea, p);
for ( i=0; i<p->num_slides; i++ ) {
int j;
struct slide *s;
s = p->slides[i];
for ( j=0; j<p->slides[i]->num_objects; j++ ) {
s->objects[j]->update_object(s->objects[j]);
}
}
}
enum corner which_corner(double xp, double yp, struct object *o)
{
double x, y; /* Relative to object position */
x = xp - o->x;
y = yp - o->y;
if ( x < 0.0 ) return CORNER_NONE;
if ( y < 0.0 ) return CORNER_NONE;
if ( x > o->bb_width ) return CORNER_NONE;
if ( y > o->bb_height ) return CORNER_NONE;
/* Top left? */
if ( (x<20.0) && (y<20.0) ) return CORNER_TL;
if ( (x>o->bb_width-20.0) && (y<20.0) ) return CORNER_TR;
if ( (x<20.0) && (y>o->bb_height-20.0) ) {
return CORNER_BL;
}
if ( (x>o->bb_width-20.0) && (y>o->bb_height-20.0) ) {
return CORNER_BR;
}
return CORNER_NONE;
}
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