2002-07-22  Zbigniew Chyla  <cyba@gnome.pl>

	* src/gnumeric.h:
	Added typedefs: GnmPlugin, PluginService, GnumericPluginLoader.

	* src/gutils.h: New macros: GNM_LIST_FOREACH, GNM_LIST_PREPEND,
	GNM_LIST_REMOVE, GNM_LIST_CONCAT, GNM_LIST_REVERSE,
	GNM_SLIST_FOREACH, GNM_SLIST_PREPEND,
	GNM_SLIST_REMOVE, GNM_SLIST_CONCAT, GNM_SLIST_REVERSE.

	* src/gutils.c: Fixed typo in comment.

	* src/plugin-loader-module.h: s/PluginInfo/GnmPlugin/

	* src/plugin-loader-module.c:
	(ServiceLoaderDataGeneral): Removed module_func_can_deactivate.
	(gnumeric_plugin_loader_module_func_can_deactivate): Removed
	(gnumeric_plugin_loader_module_set_attributes):
	Adjusted to plugin-loader.c (read attributes from GHashTable).
	s/..._load/..._load_base/
	s/..._unload/..._unload_base/
	Use new macros from gutils.h.

	* src/plugin-loader.[ch]
	s/..._load/..._load_base/
	s/..._unload/..._unload_base/
	s/is_loaded/is_base_loaded/
	s/PluginInfo/GnmPlugin/
	(GnumericPluginLoaderClass::set_attributes,
	gnumeric_plugin_loader_set_attributes: Changed signature, read
	attributes from GHashTable, not from two lists.
	(gnumeric_plugin_loader_load_base): Ignore dependencies, now
	GnmPlugin object is responsible for this.
	(gnumeric_plugin_loader_unload_base): Ditto
	(gnumeric_plugin_loader_load_service): Don't load base part of the
	plugin, plugin takes care of this.

	* src/plugin-service.[ch]:
	s/PluginInfo/GnmPlugin/
	(PluginServiceGeneral::plugin_func_can_deactivate,
	plugin_service_can_deactivate,
	plugin_service_*_can_deactivate,
	plugin_services_data_new, plugin_services_data_free,
	PluginServicesData, plugin_service_can_deactivate): Removed.
	(plugin_service_plugin_loader_initialize): Use plugins_register_loader,
	passing loader id as "plugin-id:loader-service-id".
	(plugin_service_plugin_loader_cleanup): Ditto, plugins_unregister_loader.
	Use new macros from gutils.h.

	* src/plugin.[ch]
	Cut down the number of public functions by 20.
	Documented most public functions.
	Made PluginInfo a GObject, renamed to GnmPlugin.
	GnmPlugin sends signals on state change (active, loaded,
	can_deactivate).
	Removed _peek functions, no need for two types of getters.
	Remember "plugin file state" only for plugins from previous Gnumeric
	session (so that the list doesn't get bigger with every Gnumeric
	version installing .../gnumeric/version/plugins/... directories).
	Don't save known plugins separately, use the above list.
	Store available plugins in hash table for faster lookups by id.
	Ditto for loaders.
	Removed strange *_init, *_shutdown functions, now everything is in
	plugins_init and plugins_shutdown.
	Automatically add plugin containing loader to the list of plugin
	dependencies (it's easy because loader id is now:
	plugin_id + ":" + service_id).
	Detect cyclic dependencies during activation/deactivation.
	Very simple method for determining whether plugin can be deactivated
	- use "plugin usage counter" (increased by dependent plugins or plugin
	services if something keeps references to plugin structures).
	Validate plugin id, it may include only letters, digits and underscore.
	Removed ugly enums/structs (PluginDependencyType,
	PluginLoaderStaticInfo, PluginLoaderTypeInfo).
	Other simplifications.
	No new features.
	Use new macros from gutils.h (it looks so much better).