* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/**
+ * SECTION:gis-plugin
+ * @short_description: Plugin support
+ *
+ * A plugin in libgis is a GObject which implements the GisPlugin interface. Additionally, each
+ * plugin is compiled to a separate shared object and loaded conditionally at runtime when the
+ * plugin is enabled. Each such shared object should define a GisPluginConstructor() function named
+ * gis_plugin_NAME_new which will be called when loading the plugin.
+ *
+ * Almost all libgis functionality is provided by a set of plugins. Each plugin can how however much
+ * it likes. The interface between plugins and the rest of libgis is intentionally very thin. Since
+ * libgis is the library, plugins must manually do everything. For instance, to draw something in
+ * the world, the plugin must add an object to the viewer. Likewise, plugins need to register
+ * callbacks on the viewer in order to receive updates, very little happens automagically.
+ *
+ * That being said, one thing that plugins do do automagically, is provide a configuration area.
+ * Since the plugin doesn't know what application is is being loaded form, it is better for the
+ * application to ask the plugin for it's confirmation area, not the other way around.
+ */
+
#include <glib.h>
#include <gmodule.h>
+#include <string.h>
+
#include "gis-plugin.h"
/********************
return type;
}
+/**
+ * gis_plugin_get_name:
+ * @plugin: the plugin
+ *
+ * Get a short human readable name for a plugin, this is not necessarily the
+ * same as the name of the shared object.
+ *
+ * Returns: a short name for the plugin
+ */
const gchar *gis_plugin_get_name(GisPlugin *plugin)
{
if (!GIS_IS_PLUGIN(plugin))
return GIS_PLUGIN_GET_INTERFACE(plugin)->name;
}
+/**
+ * gis_plugin_get_description:
+ * @plugin: the plugin
+ *
+ * Get a description of a plugin
+ *
+ * Returns: a description of the plugin
+ */
const gchar *gis_plugin_get_description(GisPlugin *plugin)
{
if (!GIS_IS_PLUGIN(plugin))
return GIS_PLUGIN_GET_INTERFACE(plugin)->description;
}
+/**
+ * gis_plugin_get_config:
+ * @plugin: the plugin
+ *
+ * Each plugin can provide a configuration area. Applications using libgis
+ * should display this configuration area to the user so they can modify the
+ * behavior of the plugin.
+ *
+ * Returns: a configuration widget for the plugin
+ */
GtkWidget *gis_plugin_get_config(GisPlugin *plugin)
{
if (!GIS_IS_PLUGIN(plugin))
GisPlugin *plugin;
} GisPluginStore;
+/**
+ * gis_plugins_new:
+ * @dir: the directory to search for plugins in
+ * @prefs: a #GisPrefs to save the state of plugins, or NULL
+ *
+ * Create a new plugin source. If @prefs is not %NULL, the state of the plugins
+ * will be saved when they are either enabled or disabled.
+ *
+ * Returns: the new plugin source
+ */
GisPlugins *gis_plugins_new(const gchar *dir, GisPrefs *prefs)
{
g_debug("GisPlugins: new - dir=%s", dir);
return plugins;
}
+/**
+ * gis_plugins_free:
+ * @plugins: the #GisPlugins to free
+ *
+ * Free data used by a plugin source
+ */
void gis_plugins_free(GisPlugins *plugins)
{
g_debug("GisPlugins: free");
g_free(plugins);
}
+/**
+ * gis_plugins_available:
+ * @plugins: the plugin source
+ *
+ * Search the plugin directory for shared objects which can be loaded as
+ * plugins.
+ *
+ * Returns: the list of available plugins
+ */
GList *gis_plugins_available(GisPlugins *plugins)
{
g_debug("GisPlugins: available");
}
g_dir_close(dir);
}
+ list = g_list_sort(list, (GCompareFunc)strcmp);
+ for (GList *cur = list; cur; cur = cur->next)
+ while (cur->next && g_str_equal(cur->data,cur->next->data)) {
+ GList *tmp = cur->next;
+ list = g_list_remove_link(list, cur);
+ cur = tmp;
+ }
return list;
}
+/**
+ * gis_plugins_load:
+ * @plugins: the plugins source
+ * @name: the name of the plugin to load
+ * @viewer: a #GisViewer to pass to the plugins constructor
+ * @prefs: a #GisPrefs to pass to the plugins constructor
+ *
+ * @name should be the name of the shared object without the file extension.
+ * This is the same as what is returned by gis_plugins_available().
+ *
+ * When loading plugins, the @prefs argument is used, not the #GisPrefs stored
+ * in @plugins.
+ *
+ * Returns: the new plugin
+ */
GisPlugin *gis_plugins_load(GisPlugins *plugins, const char *name,
GisViewer *viewer, GisPrefs *prefs)
{
return store->plugin;
}
+/**
+ * gis_plugins_enable:
+ * @plugins: the plugins source
+ * @name: the name of the plugin to load
+ * @viewer: a #GisViewer to pass to the plugins constructor
+ * @prefs: a #GisPrefs to pass to the plugins constructor
+ *
+ * Load a plugin and save it's loaded/unloaded state in the #GisPrefs stored in
+ * #plugins.
+ *
+ * See also: gis_plugins_load()
+ *
+ * Returns: the new plugin
+ */
GisPlugin *gis_plugins_enable(GisPlugins *plugins, const char *name,
GisViewer *viewer, GisPrefs *prefs)
{
return plugin;
}
+/**
+ * gis_plugins_load_enabled:
+ * @plugins: the plugins source
+ * @viewer: a #GisViewer to pass to the plugins constructor
+ * @prefs: a #GisPrefs to pass to the plugins constructor
+ *
+ * Load all enabled which have previously been enabled.
+ *
+ * See also: gis_plugins_load()
+ *
+ * Returns: a list of all loaded plugins
+ */
GList *gis_plugins_load_enabled(GisPlugins *plugins,
GisViewer *viewer, GisPrefs *prefs)
{
return loaded;
}
+/**
+ * gis_plugins_unload:
+ * @plugins: the plugins source
+ * @name: the name of the plugin to unload
+ *
+ * Unload a plugin and free any associated data.
+ *
+ * Returns: %FALSE
+ */
gboolean gis_plugins_unload(GisPlugins *plugins, const char *name)
{
g_debug("GisPlugins: unload %s", name);
return FALSE;
}
+/**
+ * gis_plugins_disable:
+ * @plugins: the plugins source
+ * @name: the name of the plugin to unload
+ *
+ * Unload a plugin and save it's loaded/unloaded state in the #GisPrefs stored
+ * in #plugins.
+ *
+ * See also: gis_plugins_unload()
+ *
+ * Returns: %FALSE
+ */
gboolean gis_plugins_disable(GisPlugins *plugins, const char *name)
{
gis_prefs_set_boolean_v(plugins->prefs, "plugins", name, FALSE);
return FALSE;
}
+/**
+ * gis_plugins_foreach:
+ * @plugins: the plugins source
+ * @callback: a function to call on each plugin
+ * @user_data: user data to pass to the function
+ *
+ * Iterate over all plugins loaded by the plugins source
+ */
void gis_plugins_foreach(GisPlugins *plugins, GCallback _callback, gpointer user_data)
{
g_debug("GisPlugins: foreach");
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