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/**
* @file imgstore.c IM Image Store API
* @ingroup core
*/
/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*
*/
#include "internal.h"
#include "dbus-maybe.h"
#include "debug.h"
#include "imgstore.h"
#include "util.h"
static GHashTable *imgstore;
static unsigned int nextid = 0;
/*
* NOTE: purple_imgstore_add() creates these without zeroing the memory, so
* NOTE: make sure to update that function when adding members.
*/
struct _PurpleStoredImage
{
int id;
guint8 refcount;
size_t size; /**< The image data's size. */
char *filename; /**< The filename (for the UI) */
gpointer data; /**< The image data. */
};
PurpleStoredImage *
purple_imgstore_add(gpointer data, size_t size, const char *filename)
{
PurpleStoredImage *img;
g_return_val_if_fail(data != NULL, NULL);
g_return_val_if_fail(size > 0, NULL);
img = g_new(PurpleStoredImage, 1);
PURPLE_DBUS_REGISTER_POINTER(img, PurpleStoredImage);
img->data = data;
img->size = size;
img->filename = g_strdup(filename);
img->refcount = 1;
img->id = 0;
return img;
}
PurpleStoredImage *
purple_imgstore_new_from_file(const char *path)
{
gchar *data = NULL;
size_t len;
GError *err = NULL;
g_return_val_if_fail(path != NULL && *path != '\0', NULL);
if (!g_file_get_contents(path, &data, &len, &err)) {
purple_debug_error("imgstore", "Error reading %s: %s\n",
path, err->message);
g_error_free(err);
return NULL;
}
return purple_imgstore_add(data, len, path);
}
int
purple_imgstore_add_with_id(gpointer data, size_t size, const char *filename)
{
PurpleStoredImage *img = purple_imgstore_add(data, size, filename);
if (img) {
/*
* Use the next unused id number. We do it in a loop on the
* off chance that nextid wraps back around to 0 and the hash
* table still contains entries from the first time around.
*/
do {
img->id = ++nextid;
} while (img->id == 0 || g_hash_table_lookup(imgstore, &(img->id)) != NULL);
g_hash_table_insert(imgstore, &(img->id), img);
}
return (img ? img->id : 0);
}
PurpleStoredImage *purple_imgstore_find_by_id(int id) {
PurpleStoredImage *img = g_hash_table_lookup(imgstore, &id);
if (img != NULL)
purple_debug_misc("imgstore", "retrieved image id %d\n", img->id);
return img;
}
gconstpointer purple_imgstore_get_data(PurpleStoredImage *img) {
g_return_val_if_fail(img != NULL, NULL);
return img->data;
}
size_t purple_imgstore_get_size(PurpleStoredImage *img)
{
g_return_val_if_fail(img != NULL, 0);
return img->size;
}
const char *purple_imgstore_get_filename(const PurpleStoredImage *img)
{
g_return_val_if_fail(img != NULL, NULL);
return img->filename;
}
const char *purple_imgstore_get_extension(PurpleStoredImage *img)
{
g_return_val_if_fail(img != NULL, NULL);
return purple_util_get_image_extension(img->data, img->size);
}
void purple_imgstore_ref_by_id(int id)
{
PurpleStoredImage *img = purple_imgstore_find_by_id(id);
g_return_if_fail(img != NULL);
purple_imgstore_ref(img);
}
void purple_imgstore_unref_by_id(int id)
{
PurpleStoredImage *img = purple_imgstore_find_by_id(id);
g_return_if_fail(img != NULL);
purple_imgstore_unref(img);
}
PurpleStoredImage *
purple_imgstore_ref(PurpleStoredImage *img)
{
g_return_val_if_fail(img != NULL, NULL);
img->refcount++;
return img;
}
PurpleStoredImage *
purple_imgstore_unref(PurpleStoredImage *img)
{
if (img == NULL)
return NULL;
g_return_val_if_fail(img->refcount > 0, NULL);
img->refcount--;
if (img->refcount == 0)
{
purple_signal_emit(purple_imgstore_get_handle(),
"image-deleting", img);
if (img->id)
g_hash_table_remove(imgstore, &img->id);
g_free(img->data);
g_free(img->filename);
PURPLE_DBUS_UNREGISTER_POINTER(img);
g_free(img);
img = NULL;
}
return img;
}
void *
purple_imgstore_get_handle()
{
static int handle;
return &handle;
}
void
purple_imgstore_init()
{
void *handle = purple_imgstore_get_handle();
purple_signal_register(handle, "image-deleting",
purple_marshal_VOID__POINTER, NULL,
1,
purple_value_new(PURPLE_TYPE_SUBTYPE,
PURPLE_SUBTYPE_STORED_IMAGE));
imgstore = g_hash_table_new(g_int_hash, g_int_equal);
}
void
purple_imgstore_uninit()
{
g_hash_table_destroy(imgstore);
purple_signals_unregister_by_instance(purple_imgstore_get_handle());
}
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