/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Authors:
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
#ifndef _E_PLUGIN_H
#define _E_PLUGIN_H
#include <gtk/gtk.h>
#include <libxml/tree.h>
/* ********************************************************************** */
/* Standard GObject macros */
#define E_TYPE_PLUGIN \
(e_plugin_get_type ())
#define E_PLUGIN(obj) \
(G_TYPE_CHECK_INSTANCE_CAST \
((obj), E_TYPE_PLUGIN, EPlugin))
#define E_PLUGIN_CLASS(cls) \
(G_TYPE_CHECK_CLASS_CAST \
((cls), E_TYPE_PLUGIN, EPluginClass))
#define E_IS_PLUGIN(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE \
((obj), E_TYPE_PLUGIN))
#define E_IS_PLUGIN_CLASS(cls) \
(G_TYPE_CHECK_CLASS_TYPE \
((cls), E_TYPE_PLUGIN))
#define E_PLUGIN_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS \
((obj), E_TYPE_PLUGIN, EPluginClass))
typedef struct _EPlugin EPlugin;
typedef struct _EPluginClass EPluginClass;
#define E_PLUGIN_CLASSID "org.gnome.evolution.plugin"
/* Structure to define the author(s) names and addresses */
typedef struct _EPluginAuthor EPluginAuthor;
struct _EPluginAuthor {
gchar *name;
gchar *email;
};
/**
* struct _EPlugin - An EPlugin instance.
*
* @object: Superclass.
* @id: Unique identifier for plugin instance.
* @path: Filename where the xml definition resides.
* @description: A description of the plugin's purpose.
* @name: The name of the plugin.
* @domain: The translation domain for this plugin.
* @hooks: A list of the EPluginHooks this plugin requires.
* @enabled: Whether the plugin is enabled or not. This is not fully
* implemented.
*
* The base EPlugin object is used to represent each plugin directly.
* All of the plugin's hooks are loaded and managed through this
* object.
**/
struct _EPlugin {
GObject object;
gchar *id;
gchar *path;
gchar *description;
gchar *name;
gchar *domain;
GSList *hooks;
GSList *authors; /* EPluginAuthor structures */
guint32 flags;
guint enabled:1;
};
/**
* struct _EPluginClass -
*
* @class: Superclass.
* @type: The plugin type. This is used by the plugin loader to
* determine which plugin object to instantiate to handle the plugin.
* This must be overriden by each subclass to provide a unique name.
* @construct: The construct virtual method scans the XML tree to
* initialise itself.
* @invoke: The invoke virtual method loads the plugin code, resolves
* the function name, and marshals a simple pointer to execute the
* plugin.
* @enable: Virtual method to enable/disable the plugin.
*
* The EPluginClass represents each plugin type. The type of each class is
* registered in a global table and is used to instantiate a
* container for each plugin.
*
* It provides two main functions, to load the plugin definition, and
* to invoke a function. Each plugin class is used to handle mappings
* to different languages.
**/
struct _EPluginClass {
GObjectClass parent_class;
const gchar *type;
gint (*construct)(EPlugin *, xmlNodePtr root);
gpointer (*get_symbol)(EPlugin *, const gchar *name);
gpointer (*invoke)(EPlugin *, const gchar *name, gpointer data);
void (*enable)(EPlugin *, gint state);
GtkWidget *(*get_configure_widget)(EPlugin *);
};
GType e_plugin_get_type (void);
gint e_plugin_construct (EPlugin *plugin,
xmlNodePtr root);
void e_plugin_add_load_path (const gchar *path);
gint e_plugin_load_plugins (void);
GSList * e_plugin_list_plugins (void);
gpointer e_plugin_get_symbol (EPlugin *plugin,
const gchar *name);
gpointer e_plugin_invoke (EPlugin *plugin,
const gchar *name,
gpointer data);
void e_plugin_enable (EPlugin *plugin,
gint state);
GtkWidget * e_plugin_get_configure_widget (EPlugin *plugin);
/* static helpers */
/* maps prop or content to 'g memory' */
gchar * e_plugin_xml_prop (xmlNodePtr node,
const gchar *id);
gchar * e_plugin_xml_prop_domain (xmlNodePtr node,
const gchar *id,
const gchar *domain);
gint e_plugin_xml_int (xmlNodePtr node,
const gchar *id,
gint def);
gchar * e_plugin_xml_content (xmlNodePtr node);
gchar * e_plugin_xml_content_domain (xmlNodePtr node,
const gchar *domain);
/* ********************************************************************** */
/* Standard GObject macros */
#define E_TYPE_PLUGIN_HOOK \
(e_plugin_hook_get_type ())
#define E_PLUGIN_HOOK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST \
((obj), E_TYPE_PLUGIN_HOOK, EPluginHook))
#define E_PLUGIN_HOOK_CLASS(cls) \
(G_TYPE_CHECK_CLASS_CAST \
((cls), E_TYPE_PLUGIN_HOOK, EPluginHookClass))
#define E_IS_PLUGIN_HOOK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE \
((obj), E_TYPE_PLUGIN_HOOK))
#define E_IS_PLUGIN_HOOK_CLASS(cls) \
(G_TYPE_CHECK_CLASS_TYPE \
((cls), E_TYPE_PLUGIN_HOOK))
#define E_PLUGIN_HOOK_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS \
((obj), E_TYPE_PLUGIN_HOOK, EPluginHookClass))
typedef struct _EPluginHook EPluginHook;
typedef struct _EPluginHookClass EPluginHookClass;
/* utilities for subclasses to use */
typedef struct _EPluginHookTargetMap EPluginHookTargetMap;
typedef struct _EPluginHookTargetKey EPluginHookTargetKey;
/**
* struct _EPluginHookTargetKey -
*
* @key: Enumeration value as a string.
* @value: Enumeration value as an integer.
*
* A multi-purpose string to id mapping structure used with various
* helper functions to simplify plugin hook subclassing.
**/
struct _EPluginHookTargetKey {
const gchar *key;
guint32 value;
};
/**
* struct _EPluginHookTargetMap -
*
* @type: The string id of the target.
* @id: The integer id of the target. Maps directly to the type field
* of the various plugin type target id's.
* @mask_bits: A zero-fill terminated array of EPluginHookTargetKeys.
*
* Used by EPluginHook to define mappings of target type enumerations
* to and from strings. Also used to define the mask option names
* when reading the XML plugin hook definitions.
**/
struct _EPluginHookTargetMap {
const gchar *type;
gint id;
const EPluginHookTargetKey *mask_bits; /* null terminated array */
};
/**
* struct _EPluginHook - A plugin hook.
*
* @object: Superclass.
* @plugin: The parent object.
*
* An EPluginHook is used as a container for each hook a given plugin
* is listening to.
**/
struct _EPluginHook {
GObject object;
EPlugin *plugin;
};
/**
* struct _EPluginHookClass -
*
* @class: Superclass.
* @id: The plugin hook type. This must be overriden by each subclass
* and is used as a key when loading hook definitions. This string
* should contain a globally unique name followed by a : and a version
* specification. This is to ensure plugins only hook into hooks with
* the right API.
* @construct: Virtual method used to initialise the object when
* loaded.
* @enable: Virtual method used to enable or disable the hook.
*
* The EPluginHookClass represents each hook type. The type of the
* class is registered in a global table and is used to instantiate a
* container for each hook.
**/
struct _EPluginHookClass {
GObjectClass parent_class;
const gchar *id;
gint (*construct) (EPluginHook *plugin_hook,
EPlugin *plugin,
xmlNodePtr root);
void (*enable) (EPluginHook *plugin_hook,
gint state);
};
GType e_plugin_hook_get_type (void);
EPluginHook * e_plugin_hook_new (EPlugin *plugin,
xmlNodePtr root);
void e_plugin_hook_enable (EPluginHook *plugin_hook,
gint state);
/* static methods */
guint32 e_plugin_hook_mask (xmlNodePtr root,
const EPluginHookTargetKey *map,
const gchar *prop);
guint32 e_plugin_hook_id (xmlNodePtr root,
const EPluginHookTargetKey *map,
const gchar *prop);
/* README: Currently there is only one flag.
But we may need more in the future and hence makes
sense to keep as an enum */
typedef enum _EPluginFlags {
E_PLUGIN_FLAGS_SYSTEM_PLUGIN = 1 << 0
} EPluginFlags;
#endif /* _E_PLUGIN_H */
