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/***
Copyright (C) 2011 Lucas Baudin <xapantu@gmail.com>
Author: Zeeshan Ali (Khattak) <zeeshanak@gnome.org> (from Rygel)
This file is part of Marlin.
Marlin 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, Inc.,, either version 3 of the License, or
(at your option) any later version.
Marlin 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, see <http://www.gnu.org/licenses/>.
***/
public static Marlin.PluginManager plugins;
public class Marlin.PluginManager : Object {
delegate Plugins.Base ModuleInitFunc ();
Gee.HashMap<string,Plugins.Base> plugin_hash;
Gee.List<string> names;
bool in_available = false;
bool update_queued = false;
bool is_admin = false;
[Version (deprecated = true, deprecated_since = "0.2", replacement = "Marlin.PluginManager.menuitem_references")]
public GLib.List<Gtk.Widget>? menus; /* this doesn't manage GObject references properly */
public Gee.List<Gtk.Widget> menuitem_references { get; private set; }
private string[] plugin_dirs;
public PluginManager (string plugin_dir, uint user_id) {
is_admin = (user_id == 0);
plugin_hash = new Gee.HashMap<string,Plugins.Base> ();
names = new Gee.ArrayList<string> ();
menuitem_references = new Gee.LinkedList<Gtk.Widget> ();
plugin_dirs = new string[0];
if (!is_admin) {
plugin_dirs += Path.build_filename (plugin_dir, "core");
plugin_dirs += plugin_dir;
load_plugins ();
/* Monitor plugin dirs */
foreach (string path in plugin_dirs)
set_directory_monitor (path);
}
}
private void load_plugins () {
load_modules_from_dir (plugin_dirs[0]);
in_available = true;
load_modules_from_dir (plugin_dirs[1]);
in_available = false;
}
private void set_directory_monitor (string path) {
var dir = File.new_for_path (path);
try {
var monitor = dir.monitor_directory (FileMonitorFlags.NONE, null);
monitor.changed.connect (on_plugin_directory_change);
monitor.ref (); /* keep alive */
} catch (IOError e) {
critical ("Could not setup monitor for '%s': %s", dir.get_path (), e.message);
}
}
private async void on_plugin_directory_change (File file, File? other_file, FileMonitorEvent event) {
if (update_queued)
return;
update_queued = true;
Idle.add_full (Priority.LOW, on_plugin_directory_change.callback);
yield;
load_plugins ();
update_queued = false;
}
private void load_modules_from_dir (string path) {
string attributes = FileAttribute.STANDARD_NAME + "," +
FileAttribute.STANDARD_TYPE;
FileInfo info;
FileEnumerator enumerator;
try {
var dir = File.new_for_path (path);
enumerator = dir.enumerate_children
(attributes,
FileQueryInfoFlags.NONE);
info = enumerator.next_file ();
while (info != null) {
string file_name = info.get_name ();
var plugin_file = dir.get_child_for_display_name (file_name);
if (file_name.has_suffix (".plug"))
load_plugin_keyfile (plugin_file.get_path (), path);
info = enumerator.next_file ();
}
} catch (Error error) {
critical ("Error listing contents of folder '%s': %s", path, error.message);
}
}
void load_module (string file_path, string name) {
if (plugin_hash.has_key (file_path)) {
debug ("plugin for %s already loaded. Not adding again", file_path);
return;
}
debug ("Loading plugin for %s", file_path);
Module module = Module.open (file_path, ModuleFlags.BIND_LOCAL);
if (module == null) {
warning ("Failed to load module from path '%s': %s",
file_path,
Module.error ());
return;
}
void* function;
if (!module.symbol ("module_init", out function)) {
warning ("Failed to find entry point function '%s' in '%s': %s",
"module_init",
file_path,
Module.error ());
return;
}
unowned ModuleInitFunc module_init = (ModuleInitFunc) function;
assert (module_init != null);
/* We don't want our modules to ever unload */
module.make_resident ();
Plugins.Base plug = module_init();
debug ("Loaded module source: '%s'", module.name());
if (plug != null)
plugin_hash.set (file_path, plug);
if (in_available)
names.add (name);
}
void load_plugin_keyfile (string path, string parent) {
var keyfile = new KeyFile ();
try {
keyfile.load_from_file (path, KeyFileFlags.NONE);
string name = keyfile.get_string ("Plugin", "Name");
load_module (Path.build_filename (parent, keyfile.get_string ("Plugin", "File")), name);
} catch(Error e) {
warning ("Couldn't open thie keyfile: %s, %s", path, e.message);
}
}
public void hook_context_menu (Gtk.Widget menu, List<unowned GOF.File> files) {
drop_menu_references (menu);
if (menu is Gtk.Menu)
drop_plugin_menuitems (menu as Gtk.Menu);
foreach (var plugin in plugin_hash.values)
plugin.context_menu (menu, files);
}
private void drop_plugin_menuitems (Gtk.Menu menu) {
var plugin_menu = menu as Gtk.Menu;
assert (plugin_menu != null);
foreach (var menu_item in menuitem_references)
menu_item.parent.remove (menu_item);
menuitem_references.clear ();
}
[Version (deprecated = true, deprecated_since = "0.2", replacement = "Marlin.PluginManager.drop_plugin_menuitems")]
private void drop_menu_references (Gtk.Widget menu) {
if (menus == null)
return;
foreach (var item in menus)
item.destroy ();
menus = null;
}
public void ui (Gtk.UIManager data) {
foreach (var plugin in plugin_hash.values)
plugin.ui (data);
}
public void directory_loaded (void* path) {
foreach (var plugin in plugin_hash.values)
plugin.directory_loaded (path);
}
public void interface_loaded (Gtk.Widget win) {
foreach (var plugin in plugin_hash.values)
plugin.interface_loaded (win);
}
public void update_sidebar (Gtk.Widget widget) {
foreach (var plugin in plugin_hash.values)
plugin.update_sidebar (widget);
}
public void update_file_info (GOF.File file) {
foreach (var plugin in plugin_hash.values)
plugin.update_file_info (file);
}
public Gee.List<string> get_available_plugins () {
return names;
}
}
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