gnome-shell/js/ui/remoteSearch.js
Cosimo Cecchi 10c104529f remote-search: initialize the DBus proxy asynchronously
Initializing this synchronously means that we will possibly wait for the
process to be auto-activated and answering to our call.
If the process is already running it also might not answer immediately
our request, as it might be doing sync I/O.
The right thing to do is to initialize the proxy asynchronously; there
are try/catch blocks in place for when the object is not available, or
not properly initialized.

https://bugzilla.gnome.org/show_bug.cgi?id=687491
2012-11-06 18:11:56 -05:00

212 lines
7.3 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const St = imports.gi.St;
const FileUtils = imports.misc.fileUtils;
const Search = imports.ui.search;
const KEY_FILE_GROUP = 'Shell Search Provider';
const SearchProviderIface = <interface name="org.gnome.Shell.SearchProvider">
<method name="GetInitialResultSet">
<arg type="as" direction="in" />
<arg type="as" direction="out" />
</method>
<method name="GetSubsearchResultSet">
<arg type="as" direction="in" />
<arg type="as" direction="in" />
<arg type="as" direction="out" />
</method>
<method name="GetResultMetas">
<arg type="as" direction="in" />
<arg type="aa{sv}" direction="out" />
</method>
<method name="ActivateResult">
<arg type="s" direction="in" />
</method>
</interface>;
var SearchProviderProxy = Gio.DBusProxy.makeProxyWrapper(SearchProviderIface);
function loadRemoteSearchProviders(addProviderCallback) {
let dataDirs = GLib.get_system_data_dirs();
let loadedProviders = {};
for (let i = 0; i < dataDirs.length; i++) {
let path = GLib.build_filenamev([dataDirs[i], 'gnome-shell', 'search-providers']);
let dir = Gio.file_new_for_path(path);
dir.query_info_async('standard:type', Gio.FileQueryInfoFlags.NONE,
GLib.PRIORITY_DEFAULT, null,
function(object, res) {
let exists = false;
try {
object.query_info_finish(res);
exists = true;
} catch (e) {
}
if (!exists)
return;
loadRemoteSearchProvidersFromDir(dir, loadedProviders, addProviderCallback);
});
}
};
function loadRemoteSearchProvidersFromDir(dir, loadedProviders, addProviderCallback) {
let dirPath = dir.get_path();
FileUtils.listDirAsync(dir, Lang.bind(this, function(files) {
for (let i = 0; i < files.length; i++) {
let keyfile = new GLib.KeyFile();
let path = GLib.build_filenamev([dirPath, files[i].get_name()]);
try {
keyfile.load_from_file(path, 0);
} catch(e) {
continue;
}
if (!keyfile.has_group(KEY_FILE_GROUP))
continue;
let remoteProvider;
try {
let group = KEY_FILE_GROUP;
let busName = keyfile.get_string(group, 'BusName');
let objectPath = keyfile.get_string(group, 'ObjectPath');
if (loadedProviders[objectPath])
continue;
let appInfo = null;
try {
let desktopId = keyfile.get_string(group, 'DesktopId');
appInfo = Gio.DesktopAppInfo.new(desktopId);
} catch (e) {
log('Ignoring search provider ' + path + ': missing DesktopId');
continue;
}
remoteProvider = new RemoteSearchProvider(appInfo.get_name(),
appInfo.get_icon(),
busName,
objectPath);
loadedProviders[objectPath] = remoteProvider;
} catch(e) {
log('Failed to add search provider %s: %s'.format(path, e.toString()));
continue;
}
addProviderCallback(remoteProvider);
}
}));
};
const RemoteSearchProvider = new Lang.Class({
Name: 'RemoteSearchProvider',
Extends: Search.SearchProvider,
_init: function(title, icon, dbusName, dbusPath) {
this._proxy = new SearchProviderProxy(Gio.DBus.session,
dbusName, dbusPath, Lang.bind(this, this._onProxyConstructed));
this.parent(title.toUpperCase());
this._cancellable = new Gio.Cancellable();
},
_onProxyConstructed: function(proxy) {
// Do nothing
},
createIcon: function(size, meta) {
if (meta['gicon']) {
return new St.Icon({ gicon: Gio.icon_new_for_string(meta['gicon']),
icon_size: size });
} else if (meta['icon-data']) {
let [width, height, rowStride, hasAlpha,
bitsPerSample, nChannels, data] = meta['icon-data'];
let textureCache = St.TextureCache.get_default();
return textureCache.load_from_raw(data, hasAlpha,
width, height, rowStride, size);
}
// Ugh, but we want to fall back to something ...
return new St.Icon({ icon_name: 'text-x-generic',
icon_size: size });
},
_getResultsFinished: function(results, error) {
if (error)
return;
this.searchSystem.pushResults(this, results[0]);
},
getInitialResultSet: function(terms) {
this._cancellable.cancel();
this._cancellable.reset();
try {
this._proxy.GetInitialResultSetRemote(terms,
Lang.bind(this, this._getResultsFinished),
this._cancellable);
} catch(e) {
log('Error calling GetInitialResultSet for provider %s: %s'.format( this.title, e.toString()));
this.searchSystem.pushResults(this, []);
}
},
getSubsearchResultSet: function(previousResults, newTerms) {
this._cancellable.cancel();
this._cancellable.reset();
try {
this._proxy.GetSubsearchResultSetRemote(previousResults, newTerms,
Lang.bind(this, this._getResultsFinished),
this._cancellable);
} catch(e) {
log('Error calling GetSubsearchResultSet for provider %s: %s'.format(this.title, e.toString()));
this.searchSystem.pushResults(this, []);
}
},
_getResultMetasFinished: function(results, error, callback) {
if (error) {
callback([]);
return;
}
let metas = results[0];
let resultMetas = [];
for (let i = 0; i < metas.length; i++) {
for (let prop in metas[i])
metas[i][prop] = metas[i][prop].deep_unpack();
resultMetas.push({ id: metas[i]['id'],
name: metas[i]['name'],
createIcon: Lang.bind(this,
this.createIcon, metas[i]) });
}
callback(resultMetas);
},
getResultMetas: function(ids, callback) {
this._cancellable.cancel();
this._cancellable.reset();
try {
this._proxy.GetResultMetasRemote(ids,
Lang.bind(this, this._getResultMetasFinished, callback),
this._cancellable);
} catch(e) {
log('Error calling GetResultMetas for provider %s: %s'.format(this.title, e.toString()));
callback([]);
}
},
activateResult: function(id) {
this._proxy.ActivateResultRemote(id);
}
});