// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const { Gio, GLib } = imports.gi;
const Params = imports.misc.params;
const Signals = imports.signals;
// Specified in the D-Bus specification here:
// http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager
const ObjectManagerIface = `
<node>
<interface name="org.freedesktop.DBus.ObjectManager">
<method name="GetManagedObjects">
<arg name="objects" type="a{oa{sa{sv}}}" direction="out"/>
</method>
<signal name="InterfacesAdded">
<arg name="objectPath" type="o"/>
<arg name="interfaces" type="a{sa{sv}}" />
</signal>
<signal name="InterfacesRemoved">
<arg name="objectPath" type="o"/>
<arg name="interfaces" type="as" />
</signal>
</interface>
</node>`;
const ObjectManagerInfo = Gio.DBusInterfaceInfo.new_for_xml(ObjectManagerIface);
var ObjectManager = class {
constructor(params) {
params = Params.parse(params, { connection: null,
name: null,
objectPath: null,
knownInterfaces: null,
cancellable: null,
onLoaded: null });
this._connection = params.connection;
this._serviceName = params.name;
this._managerPath = params.objectPath;
this._cancellable = params.cancellable;
this._managerProxy = new Gio.DBusProxy({ g_connection: this._connection,
g_interface_name: ObjectManagerInfo.name,
g_interface_info: ObjectManagerInfo,
g_name: this._serviceName,
g_object_path: this._managerPath,
g_flags: Gio.DBusProxyFlags.DO_NOT_AUTO_START });
this._interfaceInfos = {};
this._objects = {};
this._interfaces = {};
this._onLoaded = params.onLoaded;
if (params.knownInterfaces)
this._registerInterfaces(params.knownInterfaces);
// Start out inhibiting load until at least the proxy
// manager is loaded and the remote objects are fetched
this._numLoadInhibitors = 1;
this._managerProxy.init_async(GLib.PRIORITY_DEFAULT,
this._cancellable,
this._onManagerProxyLoaded.bind(this));
}
_tryToCompleteLoad() {
if (this._numLoadInhibitors == 0)
return;
this._numLoadInhibitors--;
if (this._numLoadInhibitors == 0) {
if (this._onLoaded)
this._onLoaded();
}
}
_addInterface(objectPath, interfaceName, onFinished) {
let info = this._interfaceInfos[interfaceName];
if (!info) {
if (onFinished)
onFinished();
return;
}
let proxy = new Gio.DBusProxy({ g_connection: this._connection,
g_name: this._serviceName,
g_object_path: objectPath,
g_interface_name: interfaceName,
g_interface_info: info,
g_flags: Gio.DBusProxyFlags.DO_NOT_AUTO_START });
proxy.init_async(GLib.PRIORITY_DEFAULT,
this._cancellable,
(initable, result) => {
let error = null;
try {
initable.init_finish(result);
} catch(e) {
logError(e, 'could not initialize proxy for interface ' + interfaceName);
if (onFinished)
onFinished();
return;
}
let isNewObject;
if (!this._objects[objectPath]) {
this._objects[objectPath] = {};
isNewObject = true;
} else {
isNewObject = false;
}
this._objects[objectPath][interfaceName] = proxy;
if (!this._interfaces[interfaceName])
this._interfaces[interfaceName] = [];
this._interfaces[interfaceName].push(proxy);
if (isNewObject)
this.emit('object-added', objectPath);
this.emit('interface-added', interfaceName, proxy);
if (onFinished)
onFinished();
});
}
_removeInterface(objectPath, interfaceName) {
if (!this._objects[objectPath])
return;
let proxy = this._objects[objectPath][interfaceName];
if (this._interfaces[interfaceName]) {
let index = this._interfaces[interfaceName].indexOf(proxy);
if (index >= 0)
this._interfaces[interfaceName].splice(index, 1);
if (this._interfaces[interfaceName].length == 0)
delete this._interfaces[interfaceName];
}
this.emit('interface-removed', interfaceName, proxy);
this._objects[objectPath][interfaceName] = null;
if (Object.keys(this._objects[objectPath]).length == 0) {
delete this._objects[objectPath];
this.emit('object-removed', objectPath);
}
}
_onManagerProxyLoaded(initable, result) {
let error = null;
try {
initable.init_finish(result);
} catch(e) {
logError(e, 'could not initialize object manager for object ' + this._serviceName);
this._tryToCompleteLoad();
return;
}
this._managerProxy.connectSignal('InterfacesAdded',
(objectManager, sender, [objectPath, interfaces]) => {
let interfaceNames = Object.keys(interfaces);
for (let i = 0; i < interfaceNames.length; i++)
this._addInterface(objectPath, interfaceNames[i]);
});
this._managerProxy.connectSignal('InterfacesRemoved',
(objectManager, sender, [objectPath, interfaceNames]) => {
for (let i = 0; i < interfaceNames.length; i++)
this._removeInterface(objectPath, interfaceNames[i]);
});
if (Object.keys(this._interfaceInfos).length == 0) {
this._tryToCompleteLoad();
return;
}
this._managerProxy.connect('notify::g-name-owner', () => {
if (this._managerProxy.g_name_owner)
this._onNameAppeared();
else
this._onNameVanished();
});
if (this._managerProxy.g_name_owner)
this._onNameAppeared();
}
_onNameAppeared() {
this._managerProxy.GetManagedObjectsRemote((result, error) => {
if (!result) {
if (error) {
logError(error, 'could not get remote objects for service ' + this._serviceName + ' path ' + this._managerPath);
}
this._tryToCompleteLoad();
return;
}
let [objects] = result;
if (!objects) {
this._tryToCompleteLoad();
return;
}
let objectPaths = Object.keys(objects);
for (let i = 0; i < objectPaths.length; i++) {
let objectPath = objectPaths[i];
let object = objects[objectPath];
let interfaceNames = Object.getOwnPropertyNames(object);
for (let j = 0; j < interfaceNames.length; j++) {
let interfaceName = interfaceNames[j];
// Prevent load from completing until the interface is loaded
this._numLoadInhibitors++;
this._addInterface(objectPath,
interfaceName,
this._tryToCompleteLoad.bind(this));
}
}
this._tryToCompleteLoad();
});
}
_onNameVanished() {
let objectPaths = Object.keys(this._objects);
for (let i = 0; i < objectPaths.length; i++) {
let objectPath = objectPaths[i];
let object = this._objects[objectPath];
let interfaceNames = Object.keys(object);
for (let j = 0; j < interfaceNames.length; j++) {
let interfaceName = interfaceNames[j];
if (object[interfaceName])
this._removeInterface(objectPath, interfaceName);
}
}
}
_registerInterfaces(interfaces) {
for (let i = 0; i < interfaces.length; i++) {
let info = Gio.DBusInterfaceInfo.new_for_xml(interfaces[i]);
this._interfaceInfos[info.name] = info;
}
}
getProxy(objectPath, interfaceName) {
let object = this._objects[objectPath];
if (!object)
return null;
return object[interfaceName];
}
getProxiesForInterface(interfaceName) {
let proxyList = this._interfaces[interfaceName];
if (!proxyList)
return [];
return proxyList;
}
getAllProxies() {
let proxies = [];
let objectPaths = Object.keys(this._objects);
for (let i = 0; i < objectPaths.length; i++) {
let object = this._objects[objectPaths];
let interfaceNames = Object.keys(object);
for (let j = 0; j < interfaceNames.length; j++) {
let interfaceName = interfaceNames[j];
if (object[interfaceName])
proxies.push(object(interfaceName));
}
}
return proxies;
}
};
Signals.addSignalMethods(ObjectManager.prototype);