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/* 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 "image-store.h"
#include "eventloop.h"
#include "util.h"
#define TEMP_IMAGE_TIMEOUT 5
static GHashTable *id_to_image = NULL;
static guint last_id = 0;
/* keys: timeout handle */
static GHashTable *temp_images = NULL;
/* keys: img id */
static GSList *perm_images = NULL;
static void
image_reset_id(gpointer _id)
{
g_return_if_fail(id_to_image != NULL);
g_hash_table_remove(id_to_image, _id);
}
static guint
image_set_id(PurpleImage *image)
{
/* Use the next unused id number. We do it in a loop on the off chance
* that next id wraps back around to 0 and the hash table still contains
* entries from the first time around.
*/
while (TRUE) {
last_id++;
if (G_UNLIKELY(last_id == 0))
continue;
if (purple_image_store_get(last_id) == NULL)
break;
}
g_object_set_data_full(G_OBJECT(image), "purple-image-store-id",
GINT_TO_POINTER(last_id), image_reset_id);
g_hash_table_insert(id_to_image, GINT_TO_POINTER(last_id), image);
return last_id;
}
static guint
image_get_id(PurpleImage *image)
{
return GPOINTER_TO_INT(g_object_get_data(G_OBJECT(image),
"purple-image-store-id"));
}
guint
purple_image_store_add(PurpleImage *image)
{
guint id;
g_return_val_if_fail(PURPLE_IS_IMAGE(image), 0);
id = image_get_id(image);
if (id > 0)
return id;
id = image_set_id(image);
g_object_ref(image);
perm_images = g_slist_prepend(perm_images, image);
return id;
}
guint
purple_image_store_add_weak(PurpleImage *image)
{
guint id;
g_return_val_if_fail(PURPLE_IS_IMAGE(image), 0);
id = image_get_id(image);
if (id > 0)
return id;
return image_set_id(image);
}
static gboolean
remove_temporary(gpointer _image)
{
PurpleImage *image = _image;
guint handle;
handle = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(image),
"purple-image-store-handle"));
g_hash_table_remove(temp_images, GINT_TO_POINTER(handle));
return G_SOURCE_REMOVE;
}
static void
cancel_temporary(gpointer key, G_GNUC_UNUSED gpointer value,
G_GNUC_UNUSED gpointer data)
{
g_source_remove(GPOINTER_TO_INT(key));
}
guint
purple_image_store_add_temporary(PurpleImage *image)
{
guint id;
guint handle;
g_return_val_if_fail(PURPLE_IS_IMAGE(image), 0);
id = image_get_id(image);
/* XXX: add_temporary doesn't extend previous temporary call, sorry */
if (id > 0)
return id;
id = image_set_id(image);
g_object_ref(image);
handle = g_timeout_add_seconds(TEMP_IMAGE_TIMEOUT,
remove_temporary, image);
g_object_set_data(G_OBJECT(image), "purple-image-store-handle",
GINT_TO_POINTER(handle));
g_hash_table_insert(temp_images, GINT_TO_POINTER(handle), image);
return id;
}
PurpleImage *
purple_image_store_get(guint id)
{
return g_hash_table_lookup(id_to_image, GINT_TO_POINTER(id));
}
PurpleImage *
purple_image_store_get_from_uri(const gchar *uri)
{
guint64 longid;
guint id;
gchar *endptr;
gchar endchar;
g_return_val_if_fail(uri != NULL, NULL);
if (!g_str_has_prefix(uri, PURPLE_IMAGE_STORE_PROTOCOL)) {
return NULL;
}
uri += sizeof(PURPLE_IMAGE_STORE_PROTOCOL) - 1;
if (uri[0] == '-')
return NULL;
longid = g_ascii_strtoull(uri, &endptr, 10);
endchar = endptr[0];
if (endchar != '\0' && endchar != '"' &&
endchar != '\'' && endchar != ' ')
{
return NULL;
}
id = longid;
if (id != longid)
return NULL;
return purple_image_store_get(id);
}
gchar *
purple_image_store_get_uri(PurpleImage *image)
{
const gchar *path;
guint img_id;
g_return_val_if_fail(PURPLE_IS_IMAGE(image), NULL);
path = purple_image_get_path(image);
if (path)
return g_filename_to_uri(path, NULL, NULL);
img_id = purple_image_store_add_weak(image);
return g_strdup_printf(PURPLE_IMAGE_STORE_PROTOCOL "%u", img_id);
}
void
_purple_image_store_init(void)
{
id_to_image = g_hash_table_new(g_direct_hash, g_direct_equal);
temp_images = g_hash_table_new_full(g_direct_hash, g_direct_equal,
NULL, g_object_unref);
}
void
_purple_image_store_uninit(void)
{
g_clear_slist(&perm_images, g_object_unref);
g_hash_table_foreach(temp_images, cancel_temporary, NULL);
g_clear_pointer(&temp_images, g_hash_table_destroy);
g_clear_pointer(&id_to_image, g_hash_table_destroy);
}
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