libpurple/smiley.h

/**
 * @file Smiley.h Smiley 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
 *
 */

#ifndef _PURPLE_SMILEY_H_
#define _PURPLE_SMILEY_H_

#include "imgstore.h"
#include "util.h"

/**
 * A custom smiley.
 * This contains everything Purple will ever need to know about a custom smiley.
 * Everything.
 */
typedef struct _PurpleSmiley PurpleSmiley;

#ifdef __cplusplus
extern "C" {
#endif

/**************************************************************************/
/** @name Custom Smiley API                                               */
/**************************************************************************/
/*@{*/

/**
 * Creates a new custom smiley structure and populates it.
 *
 * If a custom smiley with the informed shortcut already exist, it
 * will be automaticaly returned.
 *
 * @param img         The image associated with the smiley.
 * @param shortcut    The custom smiley associated shortcut.
 *
 * @return The custom smiley structure filled up.
 */
PurpleSmiley *
purple_smiley_new(PurpleStoredImage *img, const char *shortcut);

/**
 * Creates a new custom smiley structure and populates it.
 *
 * If a custom smiley with the informed shortcut already exist, it
 * will be automaticaly returned.
 *
 * @param shortcut           The custom smiley associated shortcut.
 * @param smiley_data        The custom smiley data.
 * @param smiley_data_len    The custom smiley data length.
 *
 * @return The custom smiley structure filled up.
 */
PurpleSmiley *
purple_smiley_new_from_stream(const char *shortcut, guchar *smiley_data,
                        size_t smiley_data_len, const char *filename);

/**
 * Creates a new custom smiley structure and populates it.
 *
 * The data is retrieved from an already existent file.
 *
 * If a custom smiley with the informed shortcut already exist, it
 * will be automaticaly returned.
 *
 * @param shortcut           The custom smiley associated shortcut.
 * @param filepath           The image file to be imported to a
 *                           new custom smiley.
 *
 * @return The custom smiley structure filled up.
 */
PurpleSmiley *
purple_smiley_new_from_file(const char *shortcut, const char *filepath);

/**
 * Destroy the custom smiley and release the associated resources.
 *
 * @param smiley    The custom smiley.
 */
void
purple_smiley_delete(PurpleSmiley *smiley);

/**
 * Changes the custom smiley's shortcut.
 *
 * @param smiley    The custom smiley.
 * @param shortcut  The custom smiley associated shortcut.
 *
 * @return TRUE whether the shortcut is not associated with another
 *         custom smiley and the parameters are valid. FALSE otherwise.
 */
gboolean
purple_smiley_set_shortcut(PurpleSmiley *smiley, const char *shortcut);

/**
 * Changes the custom smiley's data.
 *
 * When the filename controling is made outside this API, the param
 * @keepfilename must be TRUE.
 * Otherwise, the file and filename will be regenerated, and the
 * old one will be removed.
 *
 * @param smiley             The custom smiley.
 * @param smiley_data        The custom smiley data.
 * @param smiley_data_len    The custom smiley data length.
 * @param keepfilename      The current custom smiley's filename must be
 *                           kept.
 */
void
purple_smiley_set_data(PurpleSmiley *smiley, guchar *smiley_data,
                                           size_t smiley_data_len, gboolean keepfilename);

/**
 * Returns the custom smiley's associated shortcut.
 *
 * @param smiley   The custom smiley.
 *
 * @return The shortcut.
 */
const char *purple_smiley_get_shortcut(const PurpleSmiley *smiley);

/**
 * Returns the custom smiley data's checksum.
 *
 * @param smiley   The custom smiley.
 *
 * @return The checksum.
 */
const char *purple_smiley_get_checksum(const PurpleSmiley *smiley);

/**
 * Returns the PurpleStoredImage with the reference counter incremented.
 *
 * The returned PurpleStoredImage reference counter must be decremented
 * after use.
 *
 * @param smiley   The custom smiley.
 *
 * @return A PurpleStoredImage reference.
 */
PurpleStoredImage *purple_smiley_get_stored_image(const PurpleSmiley *smiley);

/**
 * Returns the custom smiley's data.
 *
 * @param smiley  The custom smiley.
 * @param len     If not @c NULL, the length of the icon data returned
 *                will be set in the location pointed to by this.
 *
 * @return A pointer to the custom smiley data.
 */
gconstpointer purple_smiley_get_data(const PurpleSmiley *smiley, size_t *len);

/**
 * Returns an extension corresponding to the custom smiley's file type.
 *
 * @param smiley  The custom smiley.
 *
 * @return The custom smiley's extension, "icon" if unknown, or @c NULL if
 *         the image data has disappeared.
 */
const char *purple_smiley_get_extension(const PurpleSmiley *smiley);

/**
 * Returns a full path to an custom smiley.
 *
 * If the custom smiley has data and the file exists in the cache, this
 * will return a full path to the cached file.
 *
 * In general, it is not appropriate to be poking in the file cached
 * directly.  If you find yourself wanting to use this function, think
 * very long and hard about it, and then don't.
 *
 * @param smiley  The custom smiley.
 *
 * @return A full path to the file, or @c NULL under various conditions.
 *         The caller should use #g_free to free the returned string.
 */
char *purple_smiley_get_full_path(PurpleSmiley *smiley);

/*@}*/


/**************************************************************************/
/** @name Custom Smiley Subsistem API                                     */
/**************************************************************************/
/*@{*/

/**
 * Returns a list of all custom smileys. The caller should free the list.
 *
 * @return A list of all custom smileys.
 */
GList *
purple_smileys_get_all(void);

/**
 * Adds the custom smiley to the library persistence.
 *
 * @param smiley   The custom smiley.
 *
 */
void
purple_smileys_add(PurpleSmiley *smiley);

/**
 * Remove the custom smiley from persistence.
 *
 * @param smiley   The custom smiley.
 *
 */
void
purple_smileys_remove(PurpleSmiley *smiley);

/**
 * Returns the custom smiley given it's shortcut.
 *
 * @param shortcut The custom smiley's shortcut.
 *
 * @return The custom smiley (with a reference for the caller) if found,
 *         or @c NULL if not found.
 */
PurpleSmiley *
purple_smileys_find_by_shortcut(const char *shortcut);

/**
 * Returns the custom smiley given it's checksum.
 *
 * @param checksum The custom smiley's checksum.
 *
 * @return The custom smiley (with a reference for the caller) if found,
 *         or @c NULL if not found.
 */
PurpleSmiley *
purple_smileys_find_by_checksum(const char *checksum);

/**
 * Returns the directory used to store custom smiley cached files.
 *
 * The default directory is PURPLEDIR/smileys, unless otherwise specified
 * by purple_buddy_icons_set_cache_dir().
 *
 * @return The directory to store custom smyles cached files to.
 */
const char *purple_smileys_get_storing_dir(void);

/**
 * Initializes the custom smiley subsystem.
 */
void purple_smileys_init(void);

/**
 * Uninitializes the custom smiley subsystem.
 */
void purple_smileys_uninit(void);

/*@}*/

#ifdef __cplusplus
}
#endif

#endif /* _PURPLE_SMILEY_H_ */