/usr/share/gjs-1.0/overrides/Gio.js is in libgjs0c 1.32.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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// Copyright 2011 Giovanni Campagna
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
var GLib = imports.gi.GLib;
var GjsDBus = imports.gi.GjsDBus;
var Lang = imports.lang;
var Signals = imports.signals;
var Gio;
function _signatureLength(sig) {
var counter = 0;
// make it an array
var signature = Array.prototype.slice.call(sig);
while (signature.length) {
GLib._read_single_type(sig);
counter++;
}
return counter;
}
function _proxyInvoker(methodName, sync, inSignature, arg_array) {
var replyFunc;
var flags = 0;
var cancellable = null;
/* Convert arg_array to a *real* array */
arg_array = Array.prototype.slice.call(arg_array);
/* The default replyFunc only logs the responses */
replyFunc = _logReply;
var signatureLength = inSignature.length;
var minNumberArgs = signatureLength;
var maxNumberArgs = signatureLength + 3;
if (arg_array.length < minNumberArgs) {
throw new Error("Not enough arguments passed for method: " + methodName +
". Expected " + minNumberArgs + ", got " + arg_array.length);
} else if (arg_array.length > maxNumberArgs) {
throw new Error("Too many arguments passed for method: " + methodName +
". Maximum is " + maxNumberArgs +
" + one callback and/or flags");
}
while (arg_array.length > signatureLength) {
var argNum = arg_array.length - 1;
var arg = arg_array.pop();
if (typeof(arg) == "function" && !sync) {
replyFunc = arg;
} else if (typeof(arg) == "number") {
flags = arg;
} else if (arg instanceof Gio.Cancellable) {
cancellable = arg;
} else {
throw new Error("Argument " + argNum + " of method " + methodName +
" is " + typeof(arg) + ". It should be a callback, flags or a Gio.Cancellable");
}
}
var inVariant = GLib.Variant.new('(' + inSignature.join('') + ')', arg_array);
var asyncCallback = function (proxy, result) {
try {
var outVariant = proxy.call_finish(result);
// XXX: is deep_unpack appropriate here?
// (it converts everything to a JS type, except for nested Variants)
replyFunc(outVariant.deep_unpack(), null);
} catch (e) {
replyFunc(null, e);
}
};
if (sync) {
return this.call_sync(methodName,
inVariant,
flags,
-1,
cancellable).deep_unpack();
} else {
return this.call(methodName,
inVariant,
flags,
-1,
cancellable,
asyncCallback);
}
}
function _logReply(result, exc) {
if (exc != null) {
log("Ignored exception from dbus method: " + exc.toString());
}
}
function _makeProxyMethod(method, sync) {
/* JSON methods are the default */
var i;
var name = method.name;
var inArgs = method.in_args;
var inSignature = [ ];
for (i = 0; i < inArgs.length; i++)
inSignature.push(inArgs[i].signature);
return function() {
return _proxyInvoker.call(this, name, sync, inSignature, arguments);
};
}
function _convertToNativeSignal(proxy, sender_name, signal_name, parameters) {
Signals._emit.call(proxy, signal_name, sender_name, parameters.deep_unpack());
}
function _propertyGetter(name) {
let value = this.get_cached_property(name);
return value ? value.deep_unpack() : null;
}
function _propertySetter(value, name, signature) {
let variant = GLib.Variant.new(signature, value);
this.set_cached_property(name, variant);
this.call('org.freedesktop.DBus.Properties.Set',
GLib.Variant.new('(ssv)',
[this.g_interface_name,
name, variant]),
Gio.DBusCallFlags.NONE, -1, null,
Lang.bind(this, function(proxy, result) {
try {
this.call_finish(result);
} catch(e) {
log('Could not set property ' + name + ' on remote object ' +
this.g_object_path, '. Error is ' + e.message);
}
}));
}
function _addDBusConvenience() {
let info = this.g_interface_info;
if (!info)
return;
if (info.signals.length > 0)
this.connect('g-signal', _convertToNativeSignal);
let i, methods = info.methods;
for (i = 0; i < methods.length; i++) {
var method = methods[i];
this[method.name + 'Remote'] = _makeProxyMethod(methods[i], false);
this[method.name + 'Sync'] = _makeProxyMethod(methods[i], true);
}
let properties = info.properties;
for (i = 0; i < properties.length; i++) {
let name = properties[i].name;
let signature = properties[i].signature;
Lang.defineAccessorProperty(this, name,
Lang.bind(this, _propertyGetter, name),
Lang.bind(this, _propertySetter, name, signature));
}
}
function _makeProxyWrapper(interfaceXml) {
var info = _newInterfaceInfo(interfaceXml);
var iname = info.name;
return function(bus, name, object, asyncCallback, cancellable) {
var obj = new Gio.DBusProxy({ g_connection: bus,
g_interface_name: iname,
g_interface_info: info,
g_name: name,
g_object_path: object });
if (!cancellable)
cancellable = null;
if (asyncCallback)
obj.init_async(GLib.PRIORITY_DEFAULT, cancellable, function(initable, result) {
try {
initable.init_finish(result);
asyncCallback(initable, null);
} catch(e) {
asyncCallback(null, e);
}
});
else
obj.init(cancellable);
return obj;
};
}
function _newNodeInfo(constructor, value) {
if (typeof value == 'string')
return constructor(value);
else if (value instanceof XML)
return constructor(value.toXMLString());
else
throw TypeError('Invalid type ' + Object.prototype.toString.call(value));
}
function _newInterfaceInfo(value) {
var xml;
if (typeof value == 'string')
xml = new XML(value);
else if (value instanceof XML)
xml = value;
else
throw TypeError('Invalid type ' + Object.prototype.toString.call(value));
var node;
if (value.name() == 'interface') {
// wrap inside a node
node = <node/>;
node.node += xml;
} else
node = xml;
var nodeInfo = Gio.DBusNodeInfo.new_for_xml(node);
return nodeInfo.interfaces[0];
}
function _injectToMethod(klass, method, addition) {
var previous = klass[method];
klass[method] = function() {
addition.apply(this, arguments);
return previous.apply(this, arguments);
}
}
function _wrapFunction(klass, method, addition) {
var previous = klass[method];
klass[method] = function() {
var args = Array.prototype.slice.call(arguments);
args.unshift(previous);
return addition.apply(this, args);
}
}
function _makeOutSignature(args) {
var ret = '(';
for (var i = 0; i < args.length; i++)
ret += args[i].signature;
return ret + ')';
}
function _wrapJSObject(interfaceInfo, jsObj) {
var info;
if (interfaceInfo instanceof Gio.DBusInterfaceInfo)
info = interfaceInfo
else
info = Gio.DBusInterfaceInfo.new_for_xml(interfaceInfo);
info.cache_build();
var impl = new GjsDBus.Implementation({ g_interface_info: info });
impl.connect('handle-method-call', function(impl, method_name, parameters, invocation) {
// prefer a sync version if available
if (jsObj[method_name]) {
var retval;
try {
retval = jsObj[method_name].apply(jsObj, parameters.deep_unpack());
} catch (e) {
if (e.name.indexOf('.') == -1) {
// likely to be a normal JS error
e.name = 'org.gnome.gjs.JSError.' + e.name;
}
invocation.return_dbus_error(e.name, e.message);
return;
}
if (retval === undefined) {
// undefined (no return value) is the empty tuple
retval = GLib.Variant.new_tuple([], 0);
}
try {
if (!(retval instanceof GLib.Variant)) {
// attemp packing according to out signature
var methodInfo = info.lookup_method(method_name);
var outArgs = methodInfo.out_args;
var outSignature = _makeOutSignature(outArgs);
if (outArgs.length == 1) {
// if one arg, we don't require the handler wrapping it
// into an Array
retval = [retval];
}
retval = GLib.Variant.new(outSignature, retval);
}
invocation.return_value(retval);
} catch(e) {
// if we don't do this, the other side will never see a reply
invocation.return_dbus_error('org.gnome.gjs.JSError.ValueError',
"The return value from the method handler was not in the correct format");
}
} else if (jsObj[method_name + 'Async']) {
jsObj[method_name + 'Async'](parameters.deep_unpack(), invocation);
} else {
log('Missing handler for DBus method ' + method_name);
invocation.return_dbus_error('org.gnome.gjs.NotImplementedError',
"Method ' + method_name + ' is not implemented");
}
});
impl.connect('handle-property-get', function(impl, property_name) {
var propInfo = info.lookup_property(property_name);
var jsval = jsObj[property_name];
if (jsval != undefined)
return GLib.Variant.new(propInfo.signature, jsval);
else
return null;
});
impl.connect('handle-property-set', function(impl, property_name, new_value) {
jsObj[property_name] = new_value.deep_unpack();
});
return impl;
}
function _init() {
Gio = this;
Gio.DBus = {
get session() {
return Gio.bus_get_sync(Gio.BusType.SESSION, null);
},
get system() {
return Gio.bus_get_sync(Gio.BusType.SYSTEM, null);
},
// Namespace some functions
get: Gio.bus_get,
get_finish: Gio.bus_get_finish,
get_sync: Gio.bus_get_sync,
own_name: Gio.bus_own_name,
own_name_on_connection: Gio.bus_own_name_on_connection,
unown_name: Gio.bus_unown_name,
watch_name: Gio.bus_watch_name,
watch_name_on_connection: Gio.bus_watch_name_on_connection,
unwatch_name: Gio.bus_unwatch_name,
};
// Some helpers to support current style (like DBus.system.watch_name)
Gio.DBusConnection.prototype.watch_name = function(name, flags, appeared, vanished) {
return Gio.bus_watch_name_on_connection(this, name, flags, appeared, vanished);
};
Gio.DBusConnection.prototype.unwatch_name = function(id) {
return Gio.bus_unwatch_name(id);
};
Gio.DBusConnection.prototype.own_name = function(name, flags, acquired, lost) {
return Gio.bus_own_name_on_connection(this, name, flags, acquired, lost);
};
Gio.DBusConnection.prototype.unown_name = function(id) {
return Gio.bus_unown_name(id);
};
// This should be done inside a constructor, but it cannot currently
_injectToMethod(Gio.DBusProxy.prototype, 'init', _addDBusConvenience);
_injectToMethod(Gio.DBusProxy.prototype, 'init_async', _addDBusConvenience);
Gio.DBusProxy.prototype.connectSignal = Signals._connect;
Gio.DBusProxy.prototype.disconnectSignal = Signals._disconnect;
Gio.DBusProxy.makeProxyWrapper = _makeProxyWrapper;
// Some helpers
_wrapFunction(Gio.DBusNodeInfo, 'new_for_xml', _newNodeInfo);
Gio.DBusInterfaceInfo.new_for_xml = _newInterfaceInfo;
// More or less...
Gio.DBusExportedObject = GjsDBus.Implementation;
Gio.DBusExportedObject.wrapJSObject = _wrapJSObject;
}
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