Expose screencast functionality via DBus
Like screenshots, the screen recorder can be a useful tool in other cases than being triggered by a keyboard shortcut. To account for that, export a Screencast DBus API similar to the existing Screenshot interface. https://bugzilla.gnome.org/show_bug.cgi?id=696247
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138
js/ui/screencast.js
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138
js/ui/screencast.js
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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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const Gio = imports.gi.Gio;
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const GLib = imports.gi.GLib;
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const Lang = imports.lang;
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const Shell = imports.gi.Shell;
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const Hash = imports.misc.hash;
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const Main = imports.ui.main;
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const ScreencastIface = <interface name="org.gnome.Shell.Screencast">
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<method name="Screencast">
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<arg type="s" direction="in" name="file_template"/>
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<arg type="a{sv}" direction="in" name="options"/>
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<arg type="b" direction="out" name="success"/>
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<arg type="s" direction="out" name="filename_used"/>
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</method>
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<method name="ScreencastArea">
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<arg type="i" direction="in" name="x"/>
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<arg type="i" direction="in" name="y"/>
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<arg type="i" direction="in" name="width"/>
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<arg type="i" direction="in" name="height"/>
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<arg type="s" direction="in" name="file_template"/>
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<arg type="a{sv}" direction="in" name="options"/>
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<arg type="b" direction="out" name="success"/>
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<arg type="s" direction="out" name="filename_used"/>
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</method>
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<method name="StopScreencast">
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<arg type="b" direction="out" name="success"/>
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</method>
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</interface>;
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const ScreencastService = new Lang.Class({
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Name: 'ScreencastService',
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_init: function() {
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this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(ScreencastIface, this);
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this._dbusImpl.export(Gio.DBus.session, '/org/gnome/Shell/Screencast');
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Gio.DBus.session.own_name('org.gnome.Shell.Screencast', Gio.BusNameOwnerFlags.REPLACE, null, null);
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this._recorders = new Hash.Map();
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Main.sessionMode.connect('updated',
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Lang.bind(this, this._sessionModeChanged));
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},
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_ensureRecorderForSender: function(sender) {
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let recorder = this._recorders.get(sender);
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if (!recorder) {
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recorder = new Shell.Recorder({ stage: global.stage });
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recorder._watchNameId =
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Gio.bus_watch_name(Gio.BusType.SESSION, sender, 0, null,
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Lang.bind(this, this._onNameVanished));
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this._recorders.set(sender, recorder);
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}
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return recorder;
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},
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_sessionModeChanged: function() {
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if (Main.sessionMode.allowScreencast)
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return;
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for (let sender in this._recorders.keys())
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this._recorders.delete(sender);
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},
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_onNameVanished: function(connection, name) {
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this._stopRecordingForSender(name);
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},
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_stopRecordingForSender: function(sender) {
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let recorder = this._recorders.get(sender);
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if (!recorder)
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return false;
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Gio.bus_unwatch_name(recorder._watchNameId);
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recorder.close();
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this._recorders.delete(sender);
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return true;
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},
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_applyOptionalParameters: function(recorder, options) {
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for (let option in options)
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options[option] = options[option].deep_unpack();
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if (options['pipeline'])
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recorder.set_pipeline(options['pipeline']);
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if (options['framerate'])
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recorder.set_framerate(options['framerate']);
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if (options['draw-cursor'])
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recorder.set_draw_cursor(options['draw-cursor']);
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},
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ScreencastAsync: function(params, invocation) {
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let returnValue = [false, ''];
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if (!Main.sessionMode.allowScreencast)
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invocation.return_value(GLib.Variant.new('(bs)', returnValue));
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let sender = invocation.get_sender();
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let recorder = this._ensureRecorderForSender(sender);
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if (!recorder.is_recording()) {
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let [fileTemplate, options] = params;
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recorder.set_file_template(fileTemplate);
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this._applyOptionalParameters(recorder, options);
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returnValue = recorder.record();
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}
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invocation.return_value(GLib.Variant.new('(bs)', returnValue));
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},
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ScreencastAreaAsync: function(params, invocation) {
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let returnValue = [false, ''];
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if (!Main.sessionMode.allowScreencast)
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invocation.return_value(GLib.Variant.new('(bs)', returnValue));
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let sender = invocation.get_sender();
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let recorder = this._ensureRecorderForSender(sender);
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if (!recorder.is_recording()) {
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let [x, y, width, height, fileTemplate, options] = params;
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recorder.set_file_template(fileTemplate);
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recorder.set_area(x, y, width, height);
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this._applyOptionalParameters(recorder, options);
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returnValue = recorder.record();
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}
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invocation.return_value(GLib.Variant.new('(bs)', returnValue));
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},
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StopScreencastAsync: function(params, invocation) {
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let success = this._stopRecordingForSender(invocation.get_sender());
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invocation.return_value(GLib.Variant.new('(b)', [success]));
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}
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});
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