libpurple/request.h

/**
 * @file request.h Request 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_REQUEST_H_
#define _PURPLE_REQUEST_H_

#include <stdlib.h>
#include <glib-object.h>
#include <glib.h>

#include "certificate.h"

/**
 * A request field.
 */
typedef struct _PurpleRequestField PurpleRequestField;

/**
 * Multiple fields request data.
 */
typedef struct _PurpleRequestFields PurpleRequestFields;

/**
 * A group of fields with a title.
 */
typedef struct _PurpleRequestFieldGroup PurpleRequestFieldGroup;

#include "account.h"

#define PURPLE_DEFAULT_ACTION_NONE	-1

/**
 * Request types.
 */
typedef enum
{
	PURPLE_REQUEST_INPUT = 0,  /**< Text input request.        */
	PURPLE_REQUEST_CHOICE,     /**< Multiple-choice request.   */
	PURPLE_REQUEST_ACTION,     /**< Action request.            */
	PURPLE_REQUEST_FIELDS,     /**< Multiple fields request.   */
	PURPLE_REQUEST_FILE,       /**< File open or save request. */
	PURPLE_REQUEST_FOLDER      /**< Folder selection request.  */

} PurpleRequestType;

/**
 * A type of field.
 */
typedef enum
{
	PURPLE_REQUEST_FIELD_NONE,
	PURPLE_REQUEST_FIELD_STRING,
	PURPLE_REQUEST_FIELD_INTEGER,
	PURPLE_REQUEST_FIELD_BOOLEAN,
	PURPLE_REQUEST_FIELD_CHOICE,
	PURPLE_REQUEST_FIELD_LIST,
	PURPLE_REQUEST_FIELD_LABEL,
	PURPLE_REQUEST_FIELD_IMAGE,
	PURPLE_REQUEST_FIELD_ACCOUNT,
	PURPLE_REQUEST_FIELD_CERTIFICATE

} PurpleRequestFieldType;

/**
 * Request UI operations.
 */
typedef struct
{
	/** @see purple_request_input(). */
	void *(*request_input)(const char *title, const char *primary,
	                       const char *secondary, const char *default_value,
	                       gboolean multiline, gboolean masked, gchar *hint,
	                       const char *ok_text, GCallback ok_cb,
	                       const char *cancel_text, GCallback cancel_cb,
	                       PurpleAccount *account, const char *who,
	                       PurpleConversation *conv, void *user_data);

	/** @see purple_request_choice_varg(). */
	void *(*request_choice)(const char *title, const char *primary,
	                        const char *secondary, int default_value,
	                        const char *ok_text, GCallback ok_cb,
	                        const char *cancel_text, GCallback cancel_cb,
	                        PurpleAccount *account, const char *who,
	                        PurpleConversation *conv, void *user_data,
	                        va_list choices);

	/** @see purple_request_action_varg(). */
	void *(*request_action)(const char *title, const char *primary,
	                        const char *secondary, int default_action,
	                        PurpleAccount *account, const char *who,
	                        PurpleConversation *conv, void *user_data,
	                        size_t action_count, va_list actions);

	/** @see purple_request_fields(). */
	void *(*request_fields)(const char *title, const char *primary,
	                        const char *secondary, PurpleRequestFields *fields,
	                        const char *ok_text, GCallback ok_cb,
	                        const char *cancel_text, GCallback cancel_cb,
	                        PurpleAccount *account, const char *who,
	                        PurpleConversation *conv, void *user_data);

	/** @see purple_request_file(). */
	void *(*request_file)(const char *title, const char *filename,
	                      gboolean savedialog, GCallback ok_cb,
	                      GCallback cancel_cb, PurpleAccount *account,
	                      const char *who, PurpleConversation *conv,
	                      void *user_data);

	void (*close_request)(PurpleRequestType type, void *ui_handle);

	/** @see purple_request_folder(). */
	void *(*request_folder)(const char *title, const char *dirname,
	                        GCallback ok_cb, GCallback cancel_cb,
	                        PurpleAccount *account, const char *who,
	                        PurpleConversation *conv, void *user_data);

	/** @see purple_request_action_with_icon_varg(). */
	void *(*request_action_with_icon)(const char *title, const char *primary,
	                        const char *secondary, int default_action,
	                        PurpleAccount *account, const char *who,
	                        PurpleConversation *conv,
	                        gconstpointer icon_data, gsize icon_size,
	                        void *user_data,
	                        size_t action_count, va_list actions);

	void (*_purple_reserved1)(void);
	void (*_purple_reserved2)(void);
	void (*_purple_reserved3)(void);
} PurpleRequestUiOps;

typedef void (*PurpleRequestInputCb)(void *, const char *);

typedef gboolean (*PurpleRequestFieldValidator)(PurpleRequestField *field,
	gchar **errmsg, void *user_data);

/** The type of callbacks passed to purple_request_action().  The first
 *  argument is the @a user_data parameter; the second is the index in the list
 *  of actions of the one chosen.
 */
typedef void (*PurpleRequestActionCb)(void *, int);
typedef void (*PurpleRequestChoiceCb)(void *, int);
typedef void (*PurpleRequestFieldsCb)(void *, PurpleRequestFields *fields);
typedef void (*PurpleRequestFileCb)(void *, const char *filename);

G_BEGIN_DECLS

/**************************************************************************/
/** @name Field List API                                                  */
/**************************************************************************/
/*@{*/

/**
 * Creates a list of fields to pass to purple_request_fields().
 *
 * @return A PurpleRequestFields structure.
 */
PurpleRequestFields *purple_request_fields_new(void);

/**
 * Destroys a list of fields.
 *
 * @param fields The list of fields to destroy.
 */
void purple_request_fields_destroy(PurpleRequestFields *fields);

/**
 * Adds a group of fields to the list.
 *
 * @param fields The fields list.
 * @param group  The group to add.
 */
void purple_request_fields_add_group(PurpleRequestFields *fields,
								   PurpleRequestFieldGroup *group);

/**
 * Returns a list of all groups in a field list.
 *
 * @param fields The fields list.
 *
 * @constreturn A list of groups.
 */
GList *purple_request_fields_get_groups(const PurpleRequestFields *fields);

/**
 * Returns whether or not the field with the specified ID exists.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return TRUE if the field exists, or FALSE.
 */
gboolean purple_request_fields_exists(const PurpleRequestFields *fields,
									const char *id);

/**
 * Returns a list of all required fields.
 *
 * @param fields The fields list.
 *
 * @constreturn The list of required fields.
 */
const GList *purple_request_fields_get_required(
	const PurpleRequestFields *fields);

/**
 * Returns a list of all validated fields.
 *
 * @param fields The fields list.
 *
 * @constreturn The list of validated fields.
 */
const GList *purple_request_fields_get_validatable(
	const PurpleRequestFields *fields);

/**
 * Returns whether or not a field with the specified ID is required.
 *
 * @param fields The fields list.
 * @param id     The field ID.
 *
 * @return TRUE if the specified field is required, or FALSE.
 */
gboolean purple_request_fields_is_field_required(const PurpleRequestFields *fields,
											   const char *id);

/**
 * Returns whether or not all required fields have values.
 *
 * @param fields The fields list.
 *
 * @return TRUE if all required fields have values, or FALSE.
 */
gboolean purple_request_fields_all_required_filled(
	const PurpleRequestFields *fields);

/**
 * Returns whether or not all fields are valid.
 *
 * @param fields The fields list.
 *
 * @return TRUE if all fields are valid, or FALSE.
 */
gboolean purple_request_fields_all_valid(const PurpleRequestFields *fields);

/**
 * Return the field with the specified ID.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return The field, if found.
 */
PurpleRequestField *purple_request_fields_get_field(
		const PurpleRequestFields *fields, const char *id);

/**
 * Returns the string value of a field with the specified ID.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return The string value, if found, or @c NULL otherwise.
 */
const char *purple_request_fields_get_string(const PurpleRequestFields *fields,
										   const char *id);

/**
 * Returns the integer value of a field with the specified ID.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return The integer value, if found, or 0 otherwise.
 */
int purple_request_fields_get_integer(const PurpleRequestFields *fields,
									const char *id);

/**
 * Returns the boolean value of a field with the specified ID.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return The boolean value, if found, or @c FALSE otherwise.
 */
gboolean purple_request_fields_get_bool(const PurpleRequestFields *fields,
									  const char *id);

/**
 * Returns the choice index of a field with the specified ID.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return The choice index, if found, or -1 otherwise.
 */
int purple_request_fields_get_choice(const PurpleRequestFields *fields,
								   const char *id);

/**
 * Returns the account of a field with the specified ID.
 *
 * @param fields The fields list.
 * @param id     The ID of the field.
 *
 * @return The account value, if found, or NULL otherwise.
 */
PurpleAccount *purple_request_fields_get_account(const PurpleRequestFields *fields,
											 const char *id);

/**
 * Returns the UI data associated with this object.
 *
 * @param fields The fields list.
 *
 * @return The UI data associated with this object.  This is a
 *         convenience field provided to the UIs--it is not
 *         used by the libuprple core.
 */
gpointer purple_request_fields_get_ui_data(const PurpleRequestFields *fields);

/**
 * Set the UI data associated with this object.
 *
 * @param fields The fields list.
 * @param ui_data A pointer to associate with this object.
 */
void purple_request_fields_set_ui_data(PurpleRequestFields *fields, gpointer ui_data);

/*@}*/

/**************************************************************************/
/** @name Fields Group API                                                */
/**************************************************************************/
/*@{*/

/**
 * Creates a fields group with an optional title.
 *
 * @param title The optional title to give the group.
 *
 * @return A new fields group
 */
PurpleRequestFieldGroup *purple_request_field_group_new(const char *title);

/**
 * Destroys a fields group.
 *
 * @param group The group to destroy.
 */
void purple_request_field_group_destroy(PurpleRequestFieldGroup *group);

/**
 * Adds a field to the group.
 *
 * @param group The group to add the field to.
 * @param field The field to add to the group.
 */
void purple_request_field_group_add_field(PurpleRequestFieldGroup *group,
										PurpleRequestField *field);

/**
 * Returns the title of a fields group.
 *
 * @param group The group.
 *
 * @return The title, if set.
 */
const char *purple_request_field_group_get_title(
		const PurpleRequestFieldGroup *group);

/**
 * Returns a list of all fields in a group.
 *
 * @param group The group.
 *
 * @constreturn The list of fields in the group.
 */
GList *purple_request_field_group_get_fields(
		const PurpleRequestFieldGroup *group);

/**
 * Returns a list of all fields in a group.
 *
 * @param group The group.
 *
 * @constreturn The list of fields in the group.
 */
PurpleRequestFields *purple_request_field_group_get_fields_list(
		const PurpleRequestFieldGroup *group);

/*@}*/

/**************************************************************************/
/** @name Field API                                                       */
/**************************************************************************/
/*@{*/

/**
 * Creates a field of the specified type.
 *
 * @param id   The field ID.
 * @param text The text label of the field.
 * @param type The type of field.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_new(const char *id, const char *text,
										 PurpleRequestFieldType type);

/**
 * Destroys a field.
 *
 * @param field The field to destroy.
 */
void purple_request_field_destroy(PurpleRequestField *field);

/**
 * Sets the label text of a field.
 *
 * @param field The field.
 * @param label The text label.
 */
void purple_request_field_set_label(PurpleRequestField *field, const char *label);

/**
 * Sets whether or not a field is visible.
 *
 * @param field   The field.
 * @param visible TRUE if visible, or FALSE if not.
 */
void purple_request_field_set_visible(PurpleRequestField *field, gboolean visible);

/**
 * Sets the type hint for the field.
 *
 * This is optionally used by the UIs to provide such features as
 * auto-completion for type hints like "account" and "screenname".
 *
 * @param field     The field.
 * @param type_hint The type hint.
 */
void purple_request_field_set_type_hint(PurpleRequestField *field,
									  const char *type_hint);

/**
 * Sets the tooltip for the field.
 *
 * This is optionally used by the UIs to provide a tooltip for
 * the field.
 *
 * @param field     The field.
 * @param tooltip   The tooltip text.
 */
void purple_request_field_set_tooltip(PurpleRequestField *field,
									const char *tooltip);

/**
 * Sets whether or not a field is required.
 *
 * @param field    The field.
 * @param required TRUE if required, or FALSE.
 */
void purple_request_field_set_required(PurpleRequestField *field,
									 gboolean required);

/**
 * Returns the type of a field.
 *
 * @param field The field.
 *
 * @return The field's type.
 */
PurpleRequestFieldType purple_request_field_get_type(const PurpleRequestField *field);

/**
 * Returns the group for the field.
 *
 * @param field The field.
 *
 * @return The UI data.
 */
PurpleRequestFieldGroup *purple_request_field_get_group(const PurpleRequestField *field);

/**
 * Returns the ID of a field.
 *
 * @param field The field.
 *
 * @return The ID
 */
const char *purple_request_field_get_id(const PurpleRequestField *field);

/**
 * Returns the label text of a field.
 *
 * @param field The field.
 *
 * @return The label text.
 */
const char *purple_request_field_get_label(const PurpleRequestField *field);

/**
 * Returns whether or not a field is visible.
 *
 * @param field The field.
 *
 * @return TRUE if the field is visible. FALSE otherwise.
 */
gboolean purple_request_field_is_visible(const PurpleRequestField *field);

/**
 * Returns the field's type hint.
 *
 * @param field The field.
 *
 * @return The field's type hint.
 */
const char *purple_request_field_get_type_hint(const PurpleRequestField *field);

/**
 * Returns the field's tooltip.
 *
 * @param field The field.
 *
 * @return The field's tooltip.
 */
const char *purple_request_field_get_tooltip(const PurpleRequestField *field);

/**
 * Returns whether or not a field is required.
 *
 * @param field The field.
 *
 * @return TRUE if the field is required, or FALSE.
 */
gboolean purple_request_field_is_required(const PurpleRequestField *field);

/**
 * Checks, if specified field has value.
 *
 * @param field The field.
 *
 * @return TRUE if the field has value, or FALSE.
 */
gboolean purple_request_field_is_filled(const PurpleRequestField *field);

/**
 * Sets validator for a single field.
 *
 * @param field The field.
 * @param validator The validator callback, NULL to disable validation.
 * @param user_data The data to pass to the callback.
 */
void purple_request_field_set_validator(PurpleRequestField *field,
	PurpleRequestFieldValidator validator, void *user_data);

/**
 * Returns whether or not field has validator set.
 *
 * @param field The field.
 *
 * @return TRUE if the field has validator, or FALSE.
 */
gboolean purple_request_field_is_validatable(PurpleRequestField *field);

/**
 * Checks, if specified field is valid.
 *
 * If detailed message about failure reason is needed, there is an option to
 * return (via errmsg argument) pointer to newly allocated error message.
 * It must be freed with g_free after use.
 *
 * Note: empty, not required fields are valid.
 *
 * @param field The field.
 * @param errmsg If non-NULL, the memory area, where the pointer to validation
 *        failure message will be set.
 *
 * @return TRUE, if the field is valid, FALSE otherwise.
 */
gboolean purple_request_field_is_valid(PurpleRequestField *field, gchar **errmsg);

/**
 * Returns the ui_data for a field.
 *
 * @param field The field.
 *
 * @return The UI data.
 */
gpointer purple_request_field_get_ui_data(const PurpleRequestField *field);

/**
 * Sets the ui_data for a field.
 *
 * @param field The field.
 * @param ui_data The UI data.
 *
 * @return The UI data.
 */
void purple_request_field_set_ui_data(PurpleRequestField *field,
                                      gpointer ui_data);

/*@}*/

/**************************************************************************/
/** @name String Field API                                                */
/**************************************************************************/
/*@{*/

/**
 * Creates a string request field.
 *
 * @param id            The field ID.
 * @param text          The text label of the field.
 * @param default_value The optional default value.
 * @param multiline     Whether or not this should be a multiline string.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_string_new(const char *id,
												const char *text,
												const char *default_value,
												gboolean multiline);

/**
 * Sets the default value in a string field.
 *
 * @param field         The field.
 * @param default_value The default value.
 */
void purple_request_field_string_set_default_value(PurpleRequestField *field,
												 const char *default_value);

/**
 * Sets the value in a string field.
 *
 * @param field The field.
 * @param value The value.
 */
void purple_request_field_string_set_value(PurpleRequestField *field,
										 const char *value);

/**
 * Sets whether or not a string field is masked
 * (commonly used for password fields).
 *
 * @param field  The field.
 * @param masked The masked value.
 */
void purple_request_field_string_set_masked(PurpleRequestField *field,
										  gboolean masked);

/**
 * Sets whether or not a string field is editable.
 *
 * @param field    The field.
 * @param editable The editable value.
 */
void purple_request_field_string_set_editable(PurpleRequestField *field,
											gboolean editable);

/**
 * Returns the default value in a string field.
 *
 * @param field The field.
 *
 * @return The default value.
 */
const char *purple_request_field_string_get_default_value(
		const PurpleRequestField *field);

/**
 * Returns the user-entered value in a string field.
 *
 * @param field The field.
 *
 * @return The value.
 */
const char *purple_request_field_string_get_value(const PurpleRequestField *field);

/**
 * Returns whether or not a string field is multi-line.
 *
 * @param field The field.
 *
 * @return @c TRUE if the field is mulit-line, or @c FALSE otherwise.
 */
gboolean purple_request_field_string_is_multiline(const PurpleRequestField *field);

/**
 * Returns whether or not a string field is masked.
 *
 * @param field The field.
 *
 * @return @c TRUE if the field is masked, or @c FALSE otherwise.
 */
gboolean purple_request_field_string_is_masked(const PurpleRequestField *field);

/**
 * Returns whether or not a string field is editable.
 *
 * @param field The field.
 *
 * @return @c TRUE if the field is editable, or @c FALSE otherwise.
 */
gboolean purple_request_field_string_is_editable(const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Integer Field API                                               */
/**************************************************************************/
/*@{*/

/**
 * Creates an integer field.
 *
 * @param id            The field ID.
 * @param text          The text label of the field.
 * @param default_value The default value.
 * @param lower_bound   The lower bound.
 * @param upper_bound   The upper bound.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_int_new(const char *id,
	const char *text, int default_value, int lower_bound, int upper_bound);

/**
 * Sets the default value in an integer field.
 *
 * @param field         The field.
 * @param default_value The default value.
 */
void purple_request_field_int_set_default_value(PurpleRequestField *field,
											  int default_value);

/**
 * Sets the lower bound in an integer field.
 *
 * @param field       The field.
 * @param lower_bound The lower bound.
 */
void purple_request_field_int_set_lower_bound(PurpleRequestField *field, int lower_bound);

/**
 * Sets the upper bound in an integer field.
 *
 * @param field       The field.
 * @param upper_bound The upper bound.
 */
void purple_request_field_int_set_upper_bound(PurpleRequestField *field, int lower_bound);

/**
 * Sets the value in an integer field.
 *
 * @param field The field.
 * @param value The value.
 */
void purple_request_field_int_set_value(PurpleRequestField *field, int value);

/**
 * Returns the default value in an integer field.
 *
 * @param field The field.
 *
 * @return The default value.
 */
int purple_request_field_int_get_default_value(const PurpleRequestField *field);

/**
 * Returns the lower bound in an integer field.
 *
 * @param field The field.
 *
 * @return The lower bound.
 */
int purple_request_field_int_get_lower_bound(const PurpleRequestField *field);

/**
 * Returns the upper bound in an integer field.
 *
 * @param field The field.
 *
 * @return The upper bound.
 */
int purple_request_field_int_get_upper_bound(const PurpleRequestField *field);

/**
 * Returns the user-entered value in an integer field.
 *
 * @param field The field.
 *
 * @return The value.
 */
int purple_request_field_int_get_value(const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Boolean Field API                                               */
/**************************************************************************/
/*@{*/

/**
 * Creates a boolean field.
 *
 * This is often represented as a checkbox.
 *
 * @param id            The field ID.
 * @param text          The text label of the field.
 * @param default_value The default value.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_bool_new(const char *id,
											  const char *text,
											  gboolean default_value);

/**
 * Sets the default value in an boolean field.
 *
 * @param field         The field.
 * @param default_value The default value.
 */
void purple_request_field_bool_set_default_value(PurpleRequestField *field,
											   gboolean default_value);

/**
 * Sets the value in an boolean field.
 *
 * @param field The field.
 * @param value The value.
 */
void purple_request_field_bool_set_value(PurpleRequestField *field,
									   gboolean value);

/**
 * Returns the default value in an boolean field.
 *
 * @param field The field.
 *
 * @return The default value.
 */
gboolean purple_request_field_bool_get_default_value(
		const PurpleRequestField *field);

/**
 * Returns the user-entered value in an boolean field.
 *
 * @param field The field.
 *
 * @return The value.
 */
gboolean purple_request_field_bool_get_value(const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Choice Field API                                                */
/**************************************************************************/
/*@{*/

/**
 * Creates a multiple choice field.
 *
 * This is often represented as a group of radio buttons.
 *
 * @param id            The field ID.
 * @param text          The optional label of the field.
 * @param default_value The default choice.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_choice_new(const char *id,
												const char *text,
												int default_value);

/**
 * Adds a choice to a multiple choice field.
 *
 * @param field The choice field.
 * @param label The choice label.
 */
void purple_request_field_choice_add(PurpleRequestField *field,
								   const char *label);

/**
 * Sets the default value in an choice field.
 *
 * @param field         The field.
 * @param default_value The default value.
 */
void purple_request_field_choice_set_default_value(PurpleRequestField *field,
												 int default_value);

/**
 * Sets the value in an choice field.
 *
 * @param field The field.
 * @param value The value.
 */
void purple_request_field_choice_set_value(PurpleRequestField *field, int value);

/**
 * Returns the default value in an choice field.
 *
 * @param field The field.
 *
 * @return The default value.
 */
int purple_request_field_choice_get_default_value(const PurpleRequestField *field);

/**
 * Returns the user-entered value in an choice field.
 *
 * @param field The field.
 *
 * @return The value.
 */
int purple_request_field_choice_get_value(const PurpleRequestField *field);

/**
 * Returns a list of labels in a choice field.
 *
 * @param field The field.
 *
 * @constreturn The list of labels.
 */
GList *purple_request_field_choice_get_labels(const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name List Field API                                                  */
/**************************************************************************/
/*@{*/

/**
 * Creates a multiple list item field.
 *
 * @param id   The field ID.
 * @param text The optional label of the field.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_list_new(const char *id, const char *text);

/**
 * Sets whether or not a list field allows multiple selection.
 *
 * @param field        The list field.
 * @param multi_select TRUE if multiple selection is enabled,
 *                     or FALSE otherwise.
 */
void purple_request_field_list_set_multi_select(PurpleRequestField *field,
											  gboolean multi_select);

/**
 * Returns whether or not a list field allows multiple selection.
 *
 * @param field The list field.
 *
 * @return TRUE if multiple selection is enabled, or FALSE otherwise.
 */
gboolean purple_request_field_list_get_multi_select(
	const PurpleRequestField *field);

/**
 * Returns the data for a particular item.
 *
 * @param field The list field.
 * @param text  The item text.
 *
 * @return The data associated with the item.
 */
void *purple_request_field_list_get_data(const PurpleRequestField *field,
									   const char *text);

/**
 * Adds an item to a list field.
 *
 * @param field The list field.
 * @param item  The list item.
 * @param icon_path The path to icon file, or @c NULL for no icon.
 * @param data  The associated data.
 */
void purple_request_field_list_add_icon(PurpleRequestField *field,
								 const char *item, const char* icon_path, void* data);

/**
 * Adds a selected item to the list field.
 *
 * @param field The field.
 * @param item  The item to add.
 */
void purple_request_field_list_add_selected(PurpleRequestField *field,
										  const char *item);

/**
 * Clears the list of selected items in a list field.
 *
 * @param field The field.
 */
void purple_request_field_list_clear_selected(PurpleRequestField *field);

/**
 * Sets a list of selected items in a list field.
 *
 * @param field The field.
 * @param items The list of selected items, which is not modified or freed.
 */
void purple_request_field_list_set_selected(PurpleRequestField *field,
										  GList *items);

/**
 * Returns whether or not a particular item is selected in a list field.
 *
 * @param field The field.
 * @param item  The item.
 *
 * @return TRUE if the item is selected. FALSE otherwise.
 */
gboolean purple_request_field_list_is_selected(const PurpleRequestField *field,
											 const char *item);

/**
 * Returns a list of selected items in a list field.
 *
 * To retrieve the data for each item, use
 * purple_request_field_list_get_data().
 *
 * @param field The field.
 *
 * @constreturn The list of selected items.
 */
GList *purple_request_field_list_get_selected(
	const PurpleRequestField *field);

/**
 * Returns a list of items in a list field.
 *
 * @param field The field.
 *
 * @constreturn The list of items.
 */
GList *purple_request_field_list_get_items(const PurpleRequestField *field);

/**
 * Returns a list of icons in a list field.
 *
 * The icons will correspond with the items, in order.
 *
 * @param field The field.
 *
 * @constreturn The list of icons or @c NULL (i.e. the empty GList) if no
 *              items have icons.
 */
GList *purple_request_field_list_get_icons(const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Label Field API                                                 */
/**************************************************************************/
/*@{*/

/**
 * Creates a label field.
 *
 * @param id   The field ID.
 * @param text The label of the field.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_label_new(const char *id,
											   const char *text);

/*@}*/

/**************************************************************************/
/** @name Image Field API                                                 */
/**************************************************************************/
/*@{*/

/**
 * Creates an image field.
 *
 * @param id   The field ID.
 * @param text The label of the field.
 * @param buf  The image data.
 * @param size The size of the data in @a buffer.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_image_new(const char *id, const char *text,
											   const char *buf, gsize size);

/**
 * Sets the scale factors of an image field.
 *
 * @param field The image field.
 * @param x     The x scale factor.
 * @param y     The y scale factor.
 */
void purple_request_field_image_set_scale(PurpleRequestField *field, unsigned int x, unsigned int y);

/**
 * Returns pointer to the image.
 *
 * @param field The image field.
 *
 * @return Pointer to the image.
 */
const char *purple_request_field_image_get_buffer(PurpleRequestField *field);

/**
 * Returns size (in bytes) of the image.
 *
 * @param field The image field.
 *
 * @return Size of the image.
 */
gsize purple_request_field_image_get_size(PurpleRequestField *field);

/**
 * Returns X scale coefficient of the image.
 *
 * @param field The image field.
 *
 * @return X scale coefficient of the image.
 */
unsigned int purple_request_field_image_get_scale_x(PurpleRequestField *field);

/**
 * Returns Y scale coefficient of the image.
 *
 * @param field The image field.
 *
 * @return Y scale coefficient of the image.
 */
unsigned int purple_request_field_image_get_scale_y(PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Account Field API                                               */
/**************************************************************************/
/*@{*/

/**
 * Creates an account field.
 *
 * By default, this field will not show offline accounts.
 *
 * @param id      The field ID.
 * @param text    The text label of the field.
 * @param account The optional default account.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_account_new(const char *id,
												 const char *text,
												 PurpleAccount *account);

/**
 * Sets the default account on an account field.
 *
 * @param field         The account field.
 * @param default_value The default account.
 */
void purple_request_field_account_set_default_value(PurpleRequestField *field,
												  PurpleAccount *default_value);

/**
 * Sets the account in an account field.
 *
 * @param field The account field.
 * @param value The account.
 */
void purple_request_field_account_set_value(PurpleRequestField *field,
										  PurpleAccount *value);

/**
 * Sets whether or not to show all accounts in an account field.
 *
 * If TRUE, all accounts, online or offline, will be shown. If FALSE,
 * only online accounts will be shown.
 *
 * @param field    The account field.
 * @param show_all Whether or not to show all accounts.
 */
void purple_request_field_account_set_show_all(PurpleRequestField *field,
											 gboolean show_all);

/**
 * Sets the account filter function in an account field.
 *
 * This function will determine which accounts get displayed and which
 * don't.
 *
 * @param field       The account field.
 * @param filter_func The account filter function.
 */
void purple_request_field_account_set_filter(PurpleRequestField *field,
										   PurpleFilterAccountFunc filter_func);

/**
 * Returns the default account in an account field.
 *
 * @param field The field.
 *
 * @return The default account.
 */
PurpleAccount *purple_request_field_account_get_default_value(
		const PurpleRequestField *field);

/**
 * Returns the user-entered account in an account field.
 *
 * @param field The field.
 *
 * @return The user-entered account.
 */
PurpleAccount *purple_request_field_account_get_value(
		const PurpleRequestField *field);

/**
 * Returns whether or not to show all accounts in an account field.
 *
 * If TRUE, all accounts, online or offline, will be shown. If FALSE,
 * only online accounts will be shown.
 *
 * @param field    The account field.
 * @return Whether or not to show all accounts.
 */
gboolean purple_request_field_account_get_show_all(
		const PurpleRequestField *field);

/**
 * Returns the account filter function in an account field.
 *
 * This function will determine which accounts get displayed and which
 * don't.
 *
 * @param field       The account field.
 *
 * @return The account filter function.
 */
PurpleFilterAccountFunc purple_request_field_account_get_filter(
		const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Certificate Field API                                           */
/**************************************************************************/
/*@{*/

/**
 * Creates a certificate field.
 *
 * @param id   The field ID.
 * @param text The label of the field.
 * @param cert The certificate of the field.
 *
 * @return The new field.
 */
PurpleRequestField *purple_request_field_certificate_new(const char *id,
														 const char *text,
														 PurpleCertificate *cert);

/**
 * Returns the certificate in a certificate field.
 *
 * @param field The field.
 *
 * @return The certificate.
 */
PurpleCertificate *purple_request_field_certificate_get_value(
		const PurpleRequestField *field);

/*@}*/

/**************************************************************************/
/** @name Validators for request fields.                                  */
/**************************************************************************/
/*@{*/

/**
 * Validates a field which should contain an email address.
 *
 * @see purple_request_field_set_validator
 *
 * @param field The field.
 * @param errmsg (Optional) destination for error message.
 * @param user_data Ignored.
 *
 * @return TRUE, if field contains valid email address.
 */
gboolean purple_request_field_email_validator(PurpleRequestField *field,
	gchar **errmsg, void *user_data);

/**
 * Validates a field which should contain alphanumeric content.
 *
 * @see purple_request_field_set_validator
 *
 * @param field The field.
 * @param errmsg (Optional) destination for error message.
 * @param user_data (Optional) allowed character list (NULL-terminated string).
 *
 * @return TRUE, if field contains only alphanumeric characters.
 */
gboolean purple_request_field_alphanumeric_validator(PurpleRequestField *field,
	gchar **errmsg, void *allowed_characters);

/*@}*/

/**************************************************************************/
/** @name Request API                                                     */
/**************************************************************************/
/*@{*/

/**
 * Prompts the user for text input.
 *
 * @param handle        The plugin or connection handle.  For some
 *                      things this is <em>extremely</em> important.  The
 *                      handle is used to programmatically close the request
 *                      dialog when it is no longer needed.  For PRPLs this
 *                      is often a pointer to the #PurpleConnection
 *                      instance.  For plugins this should be a similar,
 *                      unique memory location.  This value is important
 *                      because it allows a request to be closed with
 *                      purple_request_close_with_handle() when, for
 *                      example, you sign offline.  If the request is
 *                      <em>not</em> closed it is <strong>very</strong>
 *                      likely to cause a crash whenever the callback
 *                      handler functions are triggered.
 * @param title         The title of the message, or @c NULL if it should have
 *                      no title.
 * @param primary       The main point of the message, or @c NULL if you're
 *                      feeling enigmatic.
 * @param secondary     Secondary information, or @c NULL if there is none.
 * @param default_value The default value.
 * @param multiline     @c TRUE if the inputted text can span multiple lines.
 * @param masked        @c TRUE if the inputted text should be masked in some
 *                      way (such as by displaying characters as stars).  This
 *                      might be because the input is some kind of password.
 * @param hint          Optionally suggest how the input box should appear.
 *                      Use "html", for example, to allow the user to enter
 *                      HTML.
 * @param ok_text       The text for the @c OK button, which may not be @c NULL.
 * @param ok_cb         The callback for the @c OK button, which may not be @c
 *                      NULL.
 * @param cancel_text   The text for the @c Cancel button, which may not be @c
 *                      NULL.
 * @param cancel_cb     The callback for the @c Cancel button, which may be
 *                      @c NULL.
 * @param account       The #PurpleAccount associated with this request, or @c
 *                      NULL if none is.
 * @param who           The username of the buddy associated with this request,
 *                      or @c NULL if none is.
 * @param conv          The #PurpleConversation associated with this request, or
 *                      @c NULL if none is.
 * @param user_data     The data to pass to the callback.
 *
 * @return A UI-specific handle.
 */
void *purple_request_input(void *handle, const char *title, const char *primary,
	const char *secondary, const char *default_value, gboolean multiline,
	gboolean masked, gchar *hint,
	const char *ok_text, GCallback ok_cb,
	const char *cancel_text, GCallback cancel_cb,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data);

/**
 * Prompts the user for multiple-choice input.
 *
 * @param handle        The plugin or connection handle.  For some things this
 *                      is <em>extremely</em> important.  See the comments on
 *                      purple_request_input().
 * @param title         The title of the message, or @c NULL if it should have
 *                      no title.
 * @param primary       The main point of the message, or @c NULL if you're
 *                      feeling enigmatic.
 * @param secondary     Secondary information, or @c NULL if there is none.
 * @param default_value The default choice; this should be one of the values
 *                      listed in the varargs.
 * @param ok_text       The text for the @c OK button, which may not be @c NULL.
 * @param ok_cb         The callback for the @c OK button, which may not be @c
 *                      NULL.
 * @param cancel_text   The text for the @c Cancel button, which may not be @c
 *                      NULL.
 * @param cancel_cb     The callback for the @c Cancel button, or @c NULL to
 *                      do nothing.
 * @param account       The #PurpleAccount associated with this request, or @c
 *                      NULL if none is.
 * @param who           The username of the buddy associated with this request,
 *                      or @c NULL if none is.
 * @param conv          The #PurpleConversation associated with this request, or
 *                      @c NULL if none is.
 * @param user_data     The data to pass to the callback.
 * @param ...           The choices, which should be pairs of <tt>char *</tt>
 *                      descriptions and <tt>int</tt> values, terminated with a
 *                      @c NULL parameter.
 *
 * @return A UI-specific handle.
 */
void *purple_request_choice(void *handle, const char *title, const char *primary,
	const char *secondary, int default_value,
	const char *ok_text, GCallback ok_cb,
	const char *cancel_text, GCallback cancel_cb,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data, ...) G_GNUC_NULL_TERMINATED;

/**
 * <tt>va_list</tt> version of purple_request_choice(); see its documentation.
 */
void *purple_request_choice_varg(void *handle, const char *title,
	const char *primary, const char *secondary, int default_value,
	const char *ok_text, GCallback ok_cb,
	const char *cancel_text, GCallback cancel_cb,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data, va_list choices);

/**
 * Prompts the user for an action.
 *
 * This is often represented as a dialog with a button for each action.
 *
 * @param handle         The plugin or connection handle.  For some things this
 *                       is <em>extremely</em> important.  See the comments on
 *                       purple_request_input().
 * @param title          The title of the message, or @c NULL if it should have
 *                       no title.
 * @param primary        The main point of the message, or @c NULL if you're
 *                       feeling enigmatic.
 * @param secondary      Secondary information, or @c NULL if there is none.
 * @param default_action The default action, zero-indexed; if the third action
 *                       supplied should be the default, supply <tt>2</tt>.
 *                       The should be the action that users are most likely
 *                       to select.
 * @param account        The #PurpleAccount associated with this request, or @c
 *                       NULL if none is.
 * @param who            The username of the buddy associated with this request,
 *                       or @c NULL if none is.
 * @param conv           The #PurpleConversation associated with this request, or
 *                       @c NULL if none is.
 * @param user_data      The data to pass to the callback.
 * @param action_count   The number of actions.
 * @param ...            A list of actions.  These are pairs of
 *                       arguments.  The first of each pair is the
 *                       <tt>char *</tt> label that appears on the button.  It
 *                       should have an underscore before the letter you want
 *                       to use as the accelerator key for the button.  The
 *                       second of each pair is the #PurpleRequestActionCb
 *                       function to use when the button is clicked.
 *
 * @return A UI-specific handle.
 */
void *purple_request_action(void *handle, const char *title, const char *primary,
	const char *secondary, int default_action, PurpleAccount *account,
	const char *who, PurpleConversation *conv, void *user_data,
	size_t action_count, ...);

/**
 * <tt>va_list</tt> version of purple_request_action(); see its documentation.
 */
void *purple_request_action_varg(void *handle, const char *title,
	const char *primary, const char *secondary, int default_action,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data, size_t action_count, va_list actions);

/**
 * Version of purple_request_action() supplying an image for the UI to
 * optionally display as an icon in the dialog; see its documentation.
 */
void *purple_request_action_with_icon(void *handle, const char *title,
	const char *primary, const char *secondary, int default_action,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	gconstpointer icon_data, gsize icon_size, void *user_data,
	size_t action_count, ...);

/**
 * <tt>va_list</tt> version of purple_request_action_with_icon();
 * see its documentation.
 */
void *purple_request_action_with_icon_varg(void *handle, const char *title,
	const char *primary, const char *secondary, int default_action,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	gconstpointer icon_data, gsize icon_size,
	void *user_data, size_t action_count, va_list actions);


/**
 * Displays groups of fields for the user to fill in.
 *
 * @param handle      The plugin or connection handle.  For some things this
 *                    is <em>extremely</em> important.  See the comments on
 *                    purple_request_input().
 * @param title       The title of the message, or @c NULL if it should have
 *                    no title.
 * @param primary     The main point of the message, or @c NULL if you're
 *                    feeling enigmatic.
 * @param secondary   Secondary information, or @c NULL if there is none.
 * @param fields      The list of fields.
 * @param ok_text     The text for the @c OK button, which may not be @c NULL.
 * @param ok_cb       The callback for the @c OK button, which may not be @c
 *                    NULL.
 * @param cancel_text The text for the @c Cancel button, which may not be @c
 *                    NULL.
 * @param cancel_cb   The callback for the @c Cancel button, which may be
 *                    @c NULL.
 * @param account     The #PurpleAccount associated with this request, or @c
 *                    NULL if none is
 * @param who         The username of the buddy associated with this request,
 *                    or @c NULL if none is
 * @param conv        The #PurpleConversation associated with this request, or
 *                    @c NULL if none is
 * @param user_data   The data to pass to the callback.
 *
 * @return A UI-specific handle.
 */
void *purple_request_fields(void *handle, const char *title, const char *primary,
	const char *secondary, PurpleRequestFields *fields,
	const char *ok_text, GCallback ok_cb,
	const char *cancel_text, GCallback cancel_cb,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data);

/**
 * Closes a request.
 *
 * @param type     The request type.
 * @param uihandle The request UI handle.
 */
void purple_request_close(PurpleRequestType type, void *uihandle);

/**
 * Closes all requests registered with the specified handle.
 *
 * @param handle The handle, as supplied as the @a handle parameter to one of the
 *               <tt>purple_request_*</tt> functions.
 *
 * @see purple_request_input().
 */
void purple_request_close_with_handle(void *handle);

/**
 * A wrapper for purple_request_action() that uses @c Yes and @c No buttons.
 */
#define purple_request_yes_no(handle, title, primary, secondary, \
							default_action, account, who, conv, \
							user_data, yes_cb, no_cb) \
	purple_request_action((handle), (title), (primary), (secondary), \
						(default_action), account, who, conv, (user_data), 2, \
						_("_Yes"), (yes_cb), _("_No"), (no_cb))

/**
 * A wrapper for purple_request_action() that uses @c OK and @c Cancel buttons.
 */
#define purple_request_ok_cancel(handle, title, primary, secondary, \
							default_action, account, who, conv, \
						    user_data, ok_cb, cancel_cb) \
	purple_request_action((handle), (title), (primary), (secondary), \
						(default_action), account, who, conv, (user_data), 2, \
						_("_OK"), (ok_cb), _("_Cancel"), (cancel_cb))

/**
 * A wrapper for purple_request_action() that uses Accept and Cancel buttons.
 */
#define purple_request_accept_cancel(handle, title, primary, secondary, \
								   default_action, account, who, conv, \
								   user_data, accept_cb, cancel_cb) \
	purple_request_action((handle), (title), (primary), (secondary), \
						(default_action), account, who, conv, (user_data), 2, \
						_("_Accept"), (accept_cb), _("_Cancel"), (cancel_cb))

/**
 * A wrapper for purple_request_action_with_icon() that uses Accept and Cancel
 * buttons.
 */
#define purple_request_accept_cancel_with_icon(handle, title, primary, secondary, \
								   default_action, account, who, conv, \
								   icon_data, icon_size, \
								   user_data, accept_cb, cancel_cb) \
	purple_request_action_with_icon((handle), (title), (primary), (secondary), \
						(default_action), account, who, conv, icon_data, icon_size, \
						(user_data), 2, \
						_("_Accept"), (accept_cb), _("_Cancel"), (cancel_cb))

/**
 * Displays a file selector request dialog.  Returns the selected filename to
 * the callback.  Can be used for either opening a file or saving a file.
 *
 * @param handle      The plugin or connection handle.  For some things this
 *                    is <em>extremely</em> important.  See the comments on
 *                    purple_request_input().
 * @param title       The title of the message, or @c NULL if it should have
 *                    no title.
 * @param filename    The default filename (may be @c NULL)
 * @param savedialog  True if this dialog is being used to save a file.
 *                    False if it is being used to open a file.
 * @param ok_cb       The callback for the @c OK button.
 * @param cancel_cb   The callback for the @c Cancel button, which may be @c NULL.
 * @param account     The #PurpleAccount associated with this request, or @c
 *                    NULL if none is
 * @param who         The username of the buddy associated with this request,
 *                    or @c NULL if none is
 * @param conv        The #PurpleConversation associated with this request, or
 *                    @c NULL if none is
 * @param user_data   The data to pass to the callback.
 *
 * @return A UI-specific handle.
 */
void *purple_request_file(void *handle, const char *title, const char *filename,
	gboolean savedialog, GCallback ok_cb, GCallback cancel_cb,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data);

/**
 * Displays a folder select dialog. Returns the selected filename to
 * the callback.
 *
 * @param handle      The plugin or connection handle.  For some things this
 *                    is <em>extremely</em> important.  See the comments on
 *                    purple_request_input().
 * @param title       The title of the message, or @c NULL if it should have
 *                    no title.
 * @param dirname     The default directory name (may be @c NULL)
 * @param ok_cb       The callback for the @c OK button.
 * @param cancel_cb   The callback for the @c Cancel button, which may be @c NULL.
 * @param account     The #PurpleAccount associated with this request, or @c
 *                    NULL if none is
 * @param who         The username of the buddy associated with this request,
 *                    or @c NULL if none is
 * @param conv        The #PurpleConversation associated with this request, or
 *                    @c NULL if none is
 * @param user_data   The data to pass to the callback.
 *
 * @return A UI-specific handle.
 */
void *purple_request_folder(void *handle, const char *title, const char *dirname,
	GCallback ok_cb, GCallback cancel_cb,
	PurpleAccount *account, const char *who, PurpleConversation *conv,
	void *user_data);

/**
 * Prompts the user for action over a certificate.
 *
 * This is often represented as a dialog with a button for each action.
 *
 * @param handle        The plugin or connection handle.  For some things this
 *                      is <em>extremely</em> important.  See the comments on
 *                      purple_request_input().
 * @param title         The title of the message, or @c NULL if it should have
 *                      no title.
 * @param primary       The main point of the message, or @c NULL if you're
 *                      feeling enigmatic.
 * @param secondary     Secondary information, or @c NULL if there is none.
 * @param cert          The #PurpleCertificate associated with this request.
 * @param ok_text       The text for the @c OK button, which may not be @c NULL.
 * @param ok_cb         The callback for the @c OK button, which may not be
 *                      @c NULL.
 * @param cancel_text   The text for the @c Cancel button, which may not be
 *                      @c NULL.
 * @param cancel_cb     The callback for the @c Cancel button, which may be
 *                      @c NULL.
 * @param user_data     The data to pass to the callback.
 *
 * @return A UI-specific handle.
 */
void *purple_request_certificate(void *handle, const char *title,
	const char *primary, const char *secondary, PurpleCertificate *cert,
	const char *ok_text, GCallback ok_cb,
	const char *cancel_text, GCallback cancel_cb,
	void *user_data);

/*@}*/

/**************************************************************************/
/** @name UI Registration Functions                                       */
/**************************************************************************/
/*@{*/

/**
 * Sets the UI operations structure to be used when displaying a
 * request.
 *
 * @param ops The UI operations structure.
 */
void purple_request_set_ui_ops(PurpleRequestUiOps *ops);

/**
 * Returns the UI operations structure to be used when displaying a
 * request.
 *
 * @return The UI operations structure.
 */
PurpleRequestUiOps *purple_request_get_ui_ops(void);

/*@}*/

G_END_DECLS

#endif /* _PURPLE_REQUEST_H_ */