1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
7 * Class handling creation and teardown of a remoting client session.
9 * The ClientSession class controls lifetime of the client plugin
10 * object and provides the plugin with the functionality it needs to
11 * establish connection. Specifically it:
12 * - Delivers incoming/outgoing signaling messages,
13 * - Adjusts plugin size and position when destop resolution changes,
15 * This class should not access the plugin directly, instead it should
16 * do it through ClientPlugin class which abstracts plugin version
22 /** @suppress {duplicate} */
23 var remoting = remoting || {};
26 * @param {HTMLElement} container Container element for the client view.
27 * @param {string} hostDisplayName A human-readable name for the host.
28 * @param {string} accessCode The IT2Me access code. Blank for Me2Me.
29 * @param {function(boolean, function(string): void): void} fetchPin
30 * Called by Me2Me connections when a PIN needs to be obtained
32 * @param {function(string, string, string,
33 * function(string, string): void): void}
34 * fetchThirdPartyToken Called by Me2Me connections when a third party
35 * authentication token must be obtained.
36 * @param {string} authenticationMethods Comma-separated list of
37 * authentication methods the client should attempt to use.
38 * @param {string} hostId The host identifier for Me2Me, or empty for IT2Me.
39 * Mixed into authentication hashes for some authentication methods.
40 * @param {string} hostJid The jid of the host to connect to.
41 * @param {string} hostPublicKey The base64 encoded version of the host's
43 * @param {remoting.ClientSession.Mode} mode The mode of this connection.
44 * @param {string} clientPairingId For paired Me2Me connections, the
45 * pairing id for this client, as issued by the host.
46 * @param {string} clientPairedSecret For paired Me2Me connections, the
47 * paired secret for this client, as issued by the host.
49 * @extends {base.EventSource}
51 remoting.ClientSession = function(container, hostDisplayName, accessCode,
52 fetchPin, fetchThirdPartyToken,
53 authenticationMethods, hostId, hostJid,
54 hostPublicKey, mode, clientPairingId,
57 this.state_ = remoting.ClientSession.State.CREATED;
60 this.error_ = remoting.Error.NONE;
62 /** @type {HTMLElement}
64 this.container_ = container;
67 this.hostDisplayName_ = hostDisplayName;
69 this.hostJid_ = hostJid;
71 this.hostPublicKey_ = hostPublicKey;
73 this.accessCode_ = accessCode;
75 this.fetchPin_ = fetchPin;
77 this.fetchThirdPartyToken_ = fetchThirdPartyToken;
79 this.authenticationMethods_ = authenticationMethods;
81 this.hostId_ = hostId;
85 this.clientPairingId_ = clientPairingId;
87 this.clientPairedSecret_ = clientPairedSecret;
90 /** @type {remoting.ClientPlugin}
94 this.shrinkToFit_ = true;
96 this.resizeToClient_ = true;
100 this.hasReceivedFrame_ = false;
101 this.logToServer = new remoting.LogToServer();
103 /** @type {number?} @private */
104 this.notifyClientResolutionTimer_ = null;
105 /** @type {number?} @private */
106 this.bumpScrollTimer_ = null;
109 * Allow host-offline error reporting to be suppressed in situations where it
110 * would not be useful, for example, when using a cached host JID.
112 * @type {boolean} @private
114 this.logHostOfflineErrors_ = true;
117 this.callPluginLostFocus_ = this.pluginLostFocus_.bind(this);
119 this.callPluginGotFocus_ = this.pluginGotFocus_.bind(this);
121 this.callToggleFullScreen_ = remoting.fullscreen.toggle.bind(
122 remoting.fullscreen);
124 this.callOnFullScreenChanged_ = this.onFullScreenChanged_.bind(this)
127 this.screenOptionsMenu_ = new remoting.MenuButton(
128 document.getElementById('screen-options-menu'),
129 this.onShowOptionsMenu_.bind(this));
131 this.sendKeysMenu_ = new remoting.MenuButton(
132 document.getElementById('send-keys-menu')
135 /** @type {HTMLMediaElement} @private */
138 /** @type {Element} @private */
139 this.mouseCursorOverlay_ =
140 this.container_.querySelector('.mouse-cursor-overlay');
142 /** @type {Element} */
143 var img = this.mouseCursorOverlay_;
144 /** @param {Event} event @private */
145 this.updateMouseCursorPosition_ = function(event) {
146 img.style.top = event.y + 'px';
147 img.style.left = event.x + 'px';
150 /** @type {HTMLElement} @private */
151 this.resizeToClientButton_ =
152 document.getElementById('screen-resize-to-client');
153 /** @type {HTMLElement} @private */
154 this.shrinkToFitButton_ = document.getElementById('screen-shrink-to-fit');
155 /** @type {HTMLElement} @private */
156 this.fullScreenButton_ = document.getElementById('toggle-full-screen');
158 /** @type {remoting.GnubbyAuthHandler} @private */
159 this.gnubbyAuthHandler_ = null;
161 if (this.mode_ == remoting.ClientSession.Mode.IT2ME) {
162 // Resize-to-client is not supported for IT2Me hosts.
163 this.resizeToClientButton_.hidden = true;
165 this.resizeToClientButton_.hidden = false;
168 this.fullScreenButton_.addEventListener(
169 'click', this.callToggleFullScreen_, false);
170 this.defineEvents(Object.keys(remoting.ClientSession.Events));
173 base.extend(remoting.ClientSession, base.EventSource);
175 /** @enum {string} */
176 remoting.ClientSession.Events = {
177 stateChanged: 'stateChanged',
178 videoChannelStateChanged: 'videoChannelStateChanged'
182 * Get host display name.
186 remoting.ClientSession.prototype.getHostDisplayName = function() {
187 return this.hostDisplayName_;
191 * Called when the window or desktop size or the scaling settings change,
192 * to set the scroll-bar visibility.
194 * TODO(jamiewalch): crbug.com/252796: Remove this once crbug.com/240772 is
197 remoting.ClientSession.prototype.updateScrollbarVisibility = function() {
198 var needsVerticalScroll = false;
199 var needsHorizontalScroll = false;
200 if (!this.shrinkToFit_) {
201 // Determine whether or not horizontal or vertical scrollbars are
202 // required, taking into account their width.
203 var clientArea = this.getClientArea_();
204 needsVerticalScroll = clientArea.height < this.plugin_.desktopHeight;
205 needsHorizontalScroll = clientArea.width < this.plugin_.desktopWidth;
206 var kScrollBarWidth = 16;
207 if (needsHorizontalScroll && !needsVerticalScroll) {
208 needsVerticalScroll =
209 clientArea.height - kScrollBarWidth < this.plugin_.desktopHeight;
210 } else if (!needsHorizontalScroll && needsVerticalScroll) {
211 needsHorizontalScroll =
212 clientArea.width - kScrollBarWidth < this.plugin_.desktopWidth;
216 var scroller = document.getElementById('scroller');
217 if (needsHorizontalScroll) {
218 scroller.classList.remove('no-horizontal-scroll');
220 scroller.classList.add('no-horizontal-scroll');
222 if (needsVerticalScroll) {
223 scroller.classList.remove('no-vertical-scroll');
225 scroller.classList.add('no-vertical-scroll');
230 * @return {boolean} True if shrink-to-fit is enabled; false otherwise.
232 remoting.ClientSession.prototype.getShrinkToFit = function() {
233 return this.shrinkToFit_;
237 * @return {boolean} True if resize-to-client is enabled; false otherwise.
239 remoting.ClientSession.prototype.getResizeToClient = function() {
240 return this.resizeToClient_;
243 // Note that the positive values in both of these enums are copied directly
244 // from chromoting_scriptable_object.h and must be kept in sync. The negative
245 // values represent state transitions that occur within the web-app that have
246 // no corresponding plugin state transition.
247 /** @enum {number} */
248 remoting.ClientSession.State = {
249 CONNECTION_CANCELED: -3, // Connection closed (gracefully) before connecting.
250 CONNECTION_DROPPED: -2, // Succeeded, but subsequently closed with an error.
261 * @param {string} state The state name.
262 * @return {remoting.ClientSession.State} The session state enum value.
264 remoting.ClientSession.State.fromString = function(state) {
265 if (!remoting.ClientSession.State.hasOwnProperty(state)) {
266 throw "Invalid ClientSession.State: " + state;
268 return remoting.ClientSession.State[state];
273 @param {remoting.ClientSession.State} current
274 @param {remoting.ClientSession.State} previous
276 remoting.ClientSession.StateEvent = function(current, previous) {
277 /** @type {remoting.ClientSession.State} */
278 this.previous = previous
280 /** @type {remoting.ClientSession.State} */
281 this.current = current;
284 /** @enum {number} */
285 remoting.ClientSession.ConnectionError = {
290 INCOMPATIBLE_PROTOCOL: 3,
296 * @param {string} error The connection error name.
297 * @return {remoting.ClientSession.ConnectionError} The connection error enum.
299 remoting.ClientSession.ConnectionError.fromString = function(error) {
300 if (!remoting.ClientSession.ConnectionError.hasOwnProperty(error)) {
301 console.error('Unexpected ClientSession.ConnectionError string: ', error);
302 return remoting.ClientSession.ConnectionError.UNKNOWN;
304 return remoting.ClientSession.ConnectionError[error];
307 // The mode of this session.
308 /** @enum {number} */
309 remoting.ClientSession.Mode = {
315 * Type used for performance statistics collected by the plugin.
318 remoting.ClientSession.PerfStats = function() {};
319 /** @type {number} */
320 remoting.ClientSession.PerfStats.prototype.videoBandwidth;
321 /** @type {number} */
322 remoting.ClientSession.PerfStats.prototype.videoFrameRate;
323 /** @type {number} */
324 remoting.ClientSession.PerfStats.prototype.captureLatency;
325 /** @type {number} */
326 remoting.ClientSession.PerfStats.prototype.encodeLatency;
327 /** @type {number} */
328 remoting.ClientSession.PerfStats.prototype.decodeLatency;
329 /** @type {number} */
330 remoting.ClientSession.PerfStats.prototype.renderLatency;
331 /** @type {number} */
332 remoting.ClientSession.PerfStats.prototype.roundtripLatency;
334 // Keys for connection statistics.
335 remoting.ClientSession.STATS_KEY_VIDEO_BANDWIDTH = 'videoBandwidth';
336 remoting.ClientSession.STATS_KEY_VIDEO_FRAME_RATE = 'videoFrameRate';
337 remoting.ClientSession.STATS_KEY_CAPTURE_LATENCY = 'captureLatency';
338 remoting.ClientSession.STATS_KEY_ENCODE_LATENCY = 'encodeLatency';
339 remoting.ClientSession.STATS_KEY_DECODE_LATENCY = 'decodeLatency';
340 remoting.ClientSession.STATS_KEY_RENDER_LATENCY = 'renderLatency';
341 remoting.ClientSession.STATS_KEY_ROUNDTRIP_LATENCY = 'roundtripLatency';
343 // Keys for per-host settings.
344 remoting.ClientSession.KEY_REMAP_KEYS = 'remapKeys';
345 remoting.ClientSession.KEY_RESIZE_TO_CLIENT = 'resizeToClient';
346 remoting.ClientSession.KEY_SHRINK_TO_FIT = 'shrinkToFit';
349 * The id of the client plugin
353 remoting.ClientSession.prototype.PLUGIN_ID = 'session-client-plugin';
356 * Set of capabilities for which hasCapability_() can be used to test.
360 remoting.ClientSession.Capability = {
361 // When enabled this capability causes the client to send its screen
362 // resolution to the host once connection has been established. See
363 // this.plugin_.notifyClientResolution().
364 SEND_INITIAL_RESOLUTION: 'sendInitialResolution',
365 RATE_LIMIT_RESIZE_REQUESTS: 'rateLimitResizeRequests'
369 * The set of capabilities negotiated between the client and host.
370 * @type {Array.<string>}
373 remoting.ClientSession.prototype.capabilities_ = null;
376 * @param {remoting.ClientSession.Capability} capability The capability to test
378 * @return {boolean} True if the capability has been negotiated between
379 * the client and host.
382 remoting.ClientSession.prototype.hasCapability_ = function(capability) {
383 if (this.capabilities_ == null)
386 return this.capabilities_.indexOf(capability) > -1;
390 * @param {string} id Id to use for the plugin element .
391 * @param {function(string, string):boolean} onExtensionMessage The handler for
392 * protocol extension messages. Returns true if a message is recognized;
394 * @return {remoting.ClientPlugin} Create plugin object for the locally
397 remoting.ClientSession.prototype.createClientPlugin_ =
398 function(id, onExtensionMessage) {
399 var plugin = /** @type {remoting.ViewerPlugin} */
400 document.createElement('embed');
403 if (remoting.settings.CLIENT_PLUGIN_TYPE == 'pnacl') {
404 plugin.src = 'remoting_client_pnacl.nmf';
405 plugin.type = 'application/x-pnacl';
406 } else if (remoting.settings.CLIENT_PLUGIN_TYPE == 'nacl') {
407 plugin.src = 'remoting_client_nacl.nmf';
408 plugin.type = 'application/x-nacl';
410 plugin.src = 'about://none';
411 plugin.type = 'application/vnd.chromium.remoting-viewer';
416 plugin.tabIndex = 0; // Required, otherwise focus() doesn't work.
417 this.container_.querySelector('.client-plugin-container').appendChild(plugin);
419 return new remoting.ClientPlugin(plugin, onExtensionMessage);
423 * Callback function called when the plugin element gets focus.
425 remoting.ClientSession.prototype.pluginGotFocus_ = function() {
426 remoting.clipboard.initiateToHost();
430 * Callback function called when the plugin element loses focus.
432 remoting.ClientSession.prototype.pluginLostFocus_ = function() {
434 // Release all keys to prevent them becoming 'stuck down' on the host.
435 this.plugin_.releaseAllKeys();
436 if (this.plugin_.element()) {
437 // Focus should stay on the element, not (for example) the toolbar.
438 // Due to crbug.com/246335, we can't restore the focus immediately,
439 // otherwise the plugin gets confused about whether or not it has focus.
441 this.plugin_.element().focus.bind(this.plugin_.element()),
448 * Adds <embed> element to |container| and readies the sesion object.
450 * @param {function(string, string):boolean} onExtensionMessage The handler for
451 * protocol extension messages. Returns true if a message is recognized;
454 remoting.ClientSession.prototype.createPluginAndConnect =
455 function(onExtensionMessage) {
456 this.plugin_ = this.createClientPlugin_(this.PLUGIN_ID, onExtensionMessage);
457 remoting.HostSettings.load(this.hostId_,
458 this.onHostSettingsLoaded_.bind(this));
462 * @param {Object.<string>} options The current options for the host, or {}
463 * if this client has no saved settings for the host.
466 remoting.ClientSession.prototype.onHostSettingsLoaded_ = function(options) {
467 if (remoting.ClientSession.KEY_REMAP_KEYS in options &&
468 typeof(options[remoting.ClientSession.KEY_REMAP_KEYS]) ==
470 this.remapKeys_ = /** @type {string} */
471 options[remoting.ClientSession.KEY_REMAP_KEYS];
473 if (remoting.ClientSession.KEY_RESIZE_TO_CLIENT in options &&
474 typeof(options[remoting.ClientSession.KEY_RESIZE_TO_CLIENT]) ==
476 this.resizeToClient_ = /** @type {boolean} */
477 options[remoting.ClientSession.KEY_RESIZE_TO_CLIENT];
479 if (remoting.ClientSession.KEY_SHRINK_TO_FIT in options &&
480 typeof(options[remoting.ClientSession.KEY_SHRINK_TO_FIT]) ==
482 this.shrinkToFit_ = /** @type {boolean} */
483 options[remoting.ClientSession.KEY_SHRINK_TO_FIT];
486 /** @param {boolean} result */
487 this.plugin_.initialize(this.onPluginInitialized_.bind(this));
491 * Constrains the focus to the plugin element.
494 remoting.ClientSession.prototype.setFocusHandlers_ = function() {
495 this.plugin_.element().addEventListener(
496 'focus', this.callPluginGotFocus_, false);
497 this.plugin_.element().addEventListener(
498 'blur', this.callPluginLostFocus_, false);
499 this.plugin_.element().focus();
503 * @param {remoting.Error} error
505 remoting.ClientSession.prototype.resetWithError_ = function(error) {
506 this.plugin_.cleanup();
509 this.setState_(remoting.ClientSession.State.FAILED);
513 * @param {boolean} initialized
515 remoting.ClientSession.prototype.onPluginInitialized_ = function(initialized) {
517 console.error('ERROR: remoting plugin not loaded');
518 this.resetWithError_(remoting.Error.MISSING_PLUGIN);
522 if (!this.plugin_.isSupportedVersion()) {
523 this.resetWithError_(remoting.Error.BAD_PLUGIN_VERSION);
527 // Show the Send Keys menu only if the plugin has the injectKeyEvent feature,
528 // and the Ctrl-Alt-Del button only in Me2Me mode.
529 if (!this.plugin_.hasFeature(
530 remoting.ClientPlugin.Feature.INJECT_KEY_EVENT)) {
531 var sendKeysElement = document.getElementById('send-keys-menu');
532 sendKeysElement.hidden = true;
533 } else if (this.mode_ != remoting.ClientSession.Mode.ME2ME) {
534 var sendCadElement = document.getElementById('send-ctrl-alt-del');
535 sendCadElement.hidden = true;
538 // Apply customized key remappings if the plugin supports remapKeys.
539 if (this.plugin_.hasFeature(remoting.ClientPlugin.Feature.REMAP_KEY)) {
540 this.applyRemapKeys_(true);
544 // Enable MediaSource-based rendering on Chrome 37 and above.
545 var chromeVersionMajor =
546 parseInt((remoting.getChromeVersion() || '0').split('.')[0], 10);
547 if (chromeVersionMajor >= 37 &&
548 this.plugin_.hasFeature(
549 remoting.ClientPlugin.Feature.MEDIA_SOURCE_RENDERING)) {
550 this.video_ = /** @type {HTMLMediaElement} */(
551 this.container_.querySelector('video'));
552 // Make sure that the <video> element is hidden until we get the first
554 this.video_.style.width = '0px';
555 this.video_.style.height = '0px';
557 var renderer = new remoting.MediaSourceRenderer(this.video_);
558 this.plugin_.enableMediaSourceRendering(renderer);
559 this.container_.classList.add('mediasource-rendering');
561 this.container_.classList.remove('mediasource-rendering');
564 /** @param {string} msg The IQ stanza to send. */
565 this.plugin_.onOutgoingIqHandler = this.sendIq_.bind(this);
566 /** @param {string} msg The message to log. */
567 this.plugin_.onDebugMessageHandler = function(msg) {
568 console.log('plugin: ' + msg.trimRight());
571 this.plugin_.onConnectionStatusUpdateHandler =
572 this.onConnectionStatusUpdate_.bind(this);
573 this.plugin_.onConnectionReadyHandler = this.onConnectionReady_.bind(this);
574 this.plugin_.onDesktopSizeUpdateHandler =
575 this.onDesktopSizeChanged_.bind(this);
576 this.plugin_.onSetCapabilitiesHandler = this.onSetCapabilities_.bind(this);
577 this.plugin_.onGnubbyAuthHandler = this.processGnubbyAuthMessage_.bind(this);
578 this.plugin_.updateMouseCursorImage = this.updateMouseCursorImage_.bind(this);
579 this.initiateConnection_();
583 * Deletes the <embed> element from the container, without sending a
584 * session_terminate request. This is to be called when the session was
585 * disconnected by the Host.
587 * @return {void} Nothing.
589 remoting.ClientSession.prototype.removePlugin = function() {
591 this.plugin_.element().removeEventListener(
592 'focus', this.callPluginGotFocus_, false);
593 this.plugin_.element().removeEventListener(
594 'blur', this.callPluginLostFocus_, false);
595 this.plugin_.cleanup();
599 // Delete event handlers that aren't relevent when not connected.
600 this.fullScreenButton_.removeEventListener(
601 'click', this.callToggleFullScreen_, false);
603 // Leave full-screen mode, and stop listening for related events.
604 var listener = this.callOnFullScreenChanged_;
605 remoting.fullscreen.syncWithMaximize(false);
606 remoting.fullscreen.activate(
609 remoting.fullscreen.removeListener(listener);
611 if (remoting.windowFrame) {
612 remoting.windowFrame.setClientSession(null);
614 remoting.toolbar.setClientSession(null);
617 // Remove mediasource-rendering class from the container - this will also
618 // hide the <video> element.
619 this.container_.classList.remove('mediasource-rendering');
621 this.container_.removeEventListener('mousemove',
622 this.updateMouseCursorPosition_,
627 * Disconnect the current session with a particular |error|. The session will
628 * raise a |stateChanged| event in response to it. The caller should then call
629 * |cleanup| to remove and destroy the <embed> element.
631 * @param {remoting.Error} error The reason for the disconnection. Use
632 * remoting.Error.NONE if there is no error.
633 * @return {void} Nothing.
635 remoting.ClientSession.prototype.disconnect = function(error) {
636 var state = (error == remoting.Error.NONE) ?
637 remoting.ClientSession.State.CLOSED :
638 remoting.ClientSession.State.FAILED;
640 // The plugin won't send a state change notification, so we explicitly log
641 // the fact that the connection has closed.
642 this.logToServer.logClientSessionStateChange(state, error, this.mode_);
644 this.setState_(state);
648 * Deletes the <embed> element from the container and disconnects.
650 * @return {void} Nothing.
652 remoting.ClientSession.prototype.cleanup = function() {
653 remoting.wcsSandbox.setOnIq(null);
656 'to="' + this.hostJid_ + '" ' +
658 'id="session-terminate" ' +
659 'xmlns:cli="jabber:client">' +
661 'xmlns="urn:xmpp:jingle:1" ' +
662 'action="session-terminate" ' +
663 'sid="' + this.sessionId_ + '">' +
664 '<reason><success/></reason>' +
671 * @return {remoting.ClientSession.Mode} The current state.
673 remoting.ClientSession.prototype.getMode = function() {
678 * @return {remoting.ClientSession.State} The current state.
680 remoting.ClientSession.prototype.getState = function() {
685 * @return {remoting.Error} The current error code.
687 remoting.ClientSession.prototype.getError = function() {
692 * Sends a key combination to the remoting client, by sending down events for
693 * the given keys, followed by up events in reverse order.
696 * @param {[number]} keys Key codes to be sent.
697 * @return {void} Nothing.
699 remoting.ClientSession.prototype.sendKeyCombination_ = function(keys) {
700 for (var i = 0; i < keys.length; i++) {
701 this.plugin_.injectKeyEvent(keys[i], true);
703 for (var i = 0; i < keys.length; i++) {
704 this.plugin_.injectKeyEvent(keys[i], false);
709 * Sends a Ctrl-Alt-Del sequence to the remoting client.
711 * @return {void} Nothing.
713 remoting.ClientSession.prototype.sendCtrlAltDel = function() {
714 console.log('Sending Ctrl-Alt-Del.');
715 this.sendKeyCombination_([0x0700e0, 0x0700e2, 0x07004c]);
719 * Sends a Print Screen keypress to the remoting client.
721 * @return {void} Nothing.
723 remoting.ClientSession.prototype.sendPrintScreen = function() {
724 console.log('Sending Print Screen.');
725 this.sendKeyCombination_([0x070046]);
729 * Sets and stores the key remapping setting for the current host.
731 * @param {string} remappings Comma separated list of key remappings.
733 remoting.ClientSession.prototype.setRemapKeys = function(remappings) {
734 // Cancel any existing remappings and apply the new ones.
735 this.applyRemapKeys_(false);
736 this.remapKeys_ = remappings;
737 this.applyRemapKeys_(true);
739 // Save the new remapping setting.
741 options[remoting.ClientSession.KEY_REMAP_KEYS] = this.remapKeys_;
742 remoting.HostSettings.save(this.hostId_, options);
746 * Applies the configured key remappings to the session, or resets them.
748 * @param {boolean} apply True to apply remappings, false to cancel them.
750 remoting.ClientSession.prototype.applyRemapKeys_ = function(apply) {
751 // By default, under ChromeOS, remap the right Control key to the right
753 var remapKeys = this.remapKeys_;
754 if (remapKeys == '' && remoting.runningOnChromeOS()) {
755 remapKeys = '0x0700e4>0x0700e7';
758 if (remapKeys == '') {
762 var remappings = remapKeys.split(',');
763 for (var i = 0; i < remappings.length; ++i) {
764 var keyCodes = remappings[i].split('>');
765 if (keyCodes.length != 2) {
766 console.log('bad remapKey: ' + remappings[i]);
769 var fromKey = parseInt(keyCodes[0], 0);
770 var toKey = parseInt(keyCodes[1], 0);
771 if (!fromKey || !toKey) {
772 console.log('bad remapKey code: ' + remappings[i]);
776 console.log('remapKey 0x' + fromKey.toString(16) +
777 '>0x' + toKey.toString(16));
778 this.plugin_.remapKey(fromKey, toKey);
780 console.log('cancel remapKey 0x' + fromKey.toString(16));
781 this.plugin_.remapKey(fromKey, fromKey);
787 * Set the shrink-to-fit and resize-to-client flags and save them if this is
788 * a Me2Me connection.
790 * @param {boolean} shrinkToFit True if the remote desktop should be scaled
791 * down if it is larger than the client window; false if scroll-bars
792 * should be added in this case.
793 * @param {boolean} resizeToClient True if window resizes should cause the
794 * host to attempt to resize its desktop to match the client window size;
795 * false to disable this behaviour for subsequent window resizes--the
796 * current host desktop size is not restored in this case.
797 * @return {void} Nothing.
799 remoting.ClientSession.prototype.setScreenMode =
800 function(shrinkToFit, resizeToClient) {
801 if (resizeToClient && !this.resizeToClient_) {
802 var clientArea = this.getClientArea_();
803 this.plugin_.notifyClientResolution(clientArea.width,
805 window.devicePixelRatio);
808 // If enabling shrink, reset bump-scroll offsets.
809 var needsScrollReset = shrinkToFit && !this.shrinkToFit_;
811 this.shrinkToFit_ = shrinkToFit;
812 this.resizeToClient_ = resizeToClient;
813 this.updateScrollbarVisibility();
815 if (this.hostId_ != '') {
817 options[remoting.ClientSession.KEY_SHRINK_TO_FIT] = this.shrinkToFit_;
818 options[remoting.ClientSession.KEY_RESIZE_TO_CLIENT] = this.resizeToClient_;
819 remoting.HostSettings.save(this.hostId_, options);
822 this.updateDimensions();
823 if (needsScrollReset) {
830 * Called when the client receives its first frame.
832 * @return {void} Nothing.
834 remoting.ClientSession.prototype.onFirstFrameReceived = function() {
835 this.hasReceivedFrame_ = true;
839 * @return {boolean} Whether the client has received a video buffer.
841 remoting.ClientSession.prototype.hasReceivedFrame = function() {
842 return this.hasReceivedFrame_;
846 * Sends an IQ stanza via the http xmpp proxy.
849 * @param {string} msg XML string of IQ stanza to send to server.
850 * @return {void} Nothing.
852 remoting.ClientSession.prototype.sendIq_ = function(msg) {
853 // Extract the session id, so we can close the session later.
854 var parser = new DOMParser();
855 var iqNode = parser.parseFromString(msg, 'text/xml').firstChild;
856 var jingleNode = iqNode.firstChild;
858 var action = jingleNode.getAttribute('action');
859 if (jingleNode.nodeName == 'jingle' && action == 'session-initiate') {
860 this.sessionId_ = jingleNode.getAttribute('sid');
864 // HACK: Add 'x' prefix to the IDs of the outgoing messages to make sure that
865 // stanza IDs used by host and client do not match. This is necessary to
866 // workaround bug in the signaling endpoint used by chromoting.
867 // TODO(sergeyu): Remove this hack once the server-side bug is fixed.
868 var type = iqNode.getAttribute('type');
870 var id = iqNode.getAttribute('id');
871 iqNode.setAttribute('id', 'x' + id);
872 msg = (new XMLSerializer()).serializeToString(iqNode);
875 console.log(remoting.timestamp(), remoting.formatIq.prettifySendIq(msg));
878 remoting.wcsSandbox.sendIq(msg);
881 remoting.ClientSession.prototype.initiateConnection_ = function() {
882 /** @type {remoting.ClientSession} */
885 remoting.wcsSandbox.connect(onWcsConnected, this.resetWithError_.bind(this));
887 /** @param {string} localJid Local JID. */
888 function onWcsConnected(localJid) {
889 that.connectPluginToWcs_(localJid);
890 that.getSharedSecret_(onSharedSecretReceived.bind(null, localJid));
893 /** @param {string} localJid Local JID.
894 * @param {string} sharedSecret Shared secret. */
895 function onSharedSecretReceived(localJid, sharedSecret) {
896 that.plugin_.connect(
897 that.hostJid_, that.hostPublicKey_, localJid, sharedSecret,
898 that.authenticationMethods_, that.hostId_, that.clientPairingId_,
899 that.clientPairedSecret_);
904 * Connects the plugin to WCS.
907 * @param {string} localJid Local JID.
908 * @return {void} Nothing.
910 remoting.ClientSession.prototype.connectPluginToWcs_ = function(localJid) {
911 remoting.formatIq.setJids(localJid, this.hostJid_);
912 var forwardIq = this.plugin_.onIncomingIq.bind(this.plugin_);
913 /** @param {string} stanza The IQ stanza received. */
914 var onIncomingIq = function(stanza) {
915 // HACK: Remove 'x' prefix added to the id in sendIq_().
917 var parser = new DOMParser();
918 var iqNode = parser.parseFromString(stanza, 'text/xml').firstChild;
919 var type = iqNode.getAttribute('type');
920 var id = iqNode.getAttribute('id');
921 if (type != 'set' && id.charAt(0) == 'x') {
922 iqNode.setAttribute('id', id.substr(1));
923 stanza = (new XMLSerializer()).serializeToString(iqNode);
926 // Pass message as is when it is malformed.
929 console.log(remoting.timestamp(),
930 remoting.formatIq.prettifyReceiveIq(stanza));
933 remoting.wcsSandbox.setOnIq(onIncomingIq);
937 * Gets shared secret to be used for connection.
939 * @param {function(string)} callback Callback called with the shared secret.
940 * @return {void} Nothing.
943 remoting.ClientSession.prototype.getSharedSecret_ = function(callback) {
944 /** @type remoting.ClientSession */
946 if (this.plugin_.hasFeature(remoting.ClientPlugin.Feature.THIRD_PARTY_AUTH)) {
947 /** @type{function(string, string, string): void} */
948 var fetchThirdPartyToken = function(tokenUrl, hostPublicKey, scope) {
949 that.fetchThirdPartyToken_(
950 tokenUrl, hostPublicKey, scope,
951 that.plugin_.onThirdPartyTokenFetched.bind(that.plugin_));
953 this.plugin_.fetchThirdPartyTokenHandler = fetchThirdPartyToken;
955 if (this.accessCode_) {
956 // Shared secret was already supplied before connecting (It2Me case).
957 callback(this.accessCode_);
958 } else if (this.plugin_.hasFeature(
959 remoting.ClientPlugin.Feature.ASYNC_PIN)) {
960 // Plugin supports asynchronously asking for the PIN.
961 this.plugin_.useAsyncPinDialog();
962 /** @param {boolean} pairingSupported */
963 var fetchPin = function(pairingSupported) {
964 that.fetchPin_(pairingSupported,
965 that.plugin_.onPinFetched.bind(that.plugin_));
967 this.plugin_.fetchPinHandler = fetchPin;
970 // Clients that don't support asking for a PIN asynchronously also don't
971 // support pairing, so request the PIN now without offering to remember it.
972 this.fetchPin_(false, callback);
977 * Callback that the plugin invokes to indicate that the connection
978 * status has changed.
981 * @param {number} status The plugin's status.
982 * @param {number} error The plugin's error state, if any.
984 remoting.ClientSession.prototype.onConnectionStatusUpdate_ =
985 function(status, error) {
986 if (status == remoting.ClientSession.State.CONNECTED) {
987 this.setFocusHandlers_();
988 this.onDesktopSizeChanged_();
989 if (this.resizeToClient_) {
990 var clientArea = this.getClientArea_();
991 this.plugin_.notifyClientResolution(clientArea.width,
993 window.devicePixelRatio);
995 // Activate full-screen related UX.
996 remoting.fullscreen.addListener(this.callOnFullScreenChanged_);
997 remoting.fullscreen.syncWithMaximize(true);
998 if (remoting.windowFrame) {
999 remoting.windowFrame.setClientSession(this);
1001 remoting.toolbar.setClientSession(this);
1004 this.container_.addEventListener('mousemove',
1005 this.updateMouseCursorPosition_,
1008 } else if (status == remoting.ClientSession.State.FAILED) {
1010 case remoting.ClientSession.ConnectionError.HOST_IS_OFFLINE:
1011 this.error_ = remoting.Error.HOST_IS_OFFLINE;
1013 case remoting.ClientSession.ConnectionError.SESSION_REJECTED:
1014 this.error_ = remoting.Error.INVALID_ACCESS_CODE;
1016 case remoting.ClientSession.ConnectionError.INCOMPATIBLE_PROTOCOL:
1017 this.error_ = remoting.Error.INCOMPATIBLE_PROTOCOL;
1019 case remoting.ClientSession.ConnectionError.NETWORK_FAILURE:
1020 this.error_ = remoting.Error.P2P_FAILURE;
1022 case remoting.ClientSession.ConnectionError.HOST_OVERLOAD:
1023 this.error_ = remoting.Error.HOST_OVERLOAD;
1026 this.error_ = remoting.Error.UNEXPECTED;
1029 this.setState_(/** @type {remoting.ClientSession.State} */ (status));
1033 * Callback that the plugin invokes to indicate when the connection is
1037 * @param {boolean} ready True if the connection is ready.
1039 remoting.ClientSession.prototype.onConnectionReady_ = function(ready) {
1041 this.container_.classList.add('session-client-inactive');
1043 this.container_.classList.remove('session-client-inactive');
1046 this.raiseEvent(remoting.ClientSession.Events.videoChannelStateChanged,
1051 * Called when the client-host capabilities negotiation is complete.
1053 * @param {!Array.<string>} capabilities The set of capabilities negotiated
1054 * between the client and host.
1055 * @return {void} Nothing.
1058 remoting.ClientSession.prototype.onSetCapabilities_ = function(capabilities) {
1059 if (this.capabilities_ != null) {
1060 console.error('onSetCapabilities_() is called more than once');
1064 this.capabilities_ = capabilities;
1065 if (this.hasCapability_(
1066 remoting.ClientSession.Capability.SEND_INITIAL_RESOLUTION)) {
1067 var clientArea = this.getClientArea_();
1068 this.plugin_.notifyClientResolution(clientArea.width,
1070 window.devicePixelRatio);
1076 * @param {remoting.ClientSession.State} newState The new state for the session.
1077 * @return {void} Nothing.
1079 remoting.ClientSession.prototype.setState_ = function(newState) {
1080 var oldState = this.state_;
1081 this.state_ = newState;
1082 var state = this.state_;
1083 if (oldState == remoting.ClientSession.State.CONNECTING) {
1084 if (this.state_ == remoting.ClientSession.State.CLOSED) {
1085 state = remoting.ClientSession.State.CONNECTION_CANCELED;
1086 } else if (this.state_ == remoting.ClientSession.State.FAILED &&
1087 this.error_ == remoting.Error.HOST_IS_OFFLINE &&
1088 !this.logHostOfflineErrors_) {
1089 // The application requested host-offline errors to be suppressed, for
1090 // example, because this connection attempt is using a cached host JID.
1091 console.log('Suppressing host-offline error.');
1092 state = remoting.ClientSession.State.CONNECTION_CANCELED;
1094 } else if (oldState == remoting.ClientSession.State.CONNECTED &&
1095 this.state_ == remoting.ClientSession.State.FAILED) {
1096 state = remoting.ClientSession.State.CONNECTION_DROPPED;
1098 this.logToServer.logClientSessionStateChange(state, this.error_, this.mode_);
1099 if (this.state_ == remoting.ClientSession.State.CONNECTED) {
1100 this.createGnubbyAuthHandler_();
1103 this.raiseEvent(remoting.ClientSession.Events.stateChanged,
1104 new remoting.ClientSession.StateEvent(newState, oldState)
1109 * This is a callback that gets called when the window is resized.
1111 * @return {void} Nothing.
1113 remoting.ClientSession.prototype.onResize = function() {
1114 this.updateDimensions();
1116 if (this.notifyClientResolutionTimer_) {
1117 window.clearTimeout(this.notifyClientResolutionTimer_);
1118 this.notifyClientResolutionTimer_ = null;
1121 // Defer notifying the host of the change until the window stops resizing, to
1122 // avoid overloading the control channel with notifications.
1123 if (this.resizeToClient_) {
1124 var kResizeRateLimitMs = 1000;
1125 if (this.hasCapability_(
1126 remoting.ClientSession.Capability.RATE_LIMIT_RESIZE_REQUESTS)) {
1127 kResizeRateLimitMs = 250;
1129 var clientArea = this.getClientArea_();
1130 this.notifyClientResolutionTimer_ = window.setTimeout(
1131 this.plugin_.notifyClientResolution.bind(this.plugin_,
1134 window.devicePixelRatio),
1135 kResizeRateLimitMs);
1138 // If bump-scrolling is enabled, adjust the plugin margins to fully utilize
1139 // the new window area.
1140 this.resetScroll_();
1142 this.updateScrollbarVisibility();
1146 * Requests that the host pause or resume video updates.
1148 * @param {boolean} pause True to pause video, false to resume.
1149 * @return {void} Nothing.
1151 remoting.ClientSession.prototype.pauseVideo = function(pause) {
1153 this.plugin_.pauseVideo(pause);
1158 * Requests that the host pause or resume audio.
1160 * @param {boolean} pause True to pause audio, false to resume.
1161 * @return {void} Nothing.
1163 remoting.ClientSession.prototype.pauseAudio = function(pause) {
1165 this.plugin_.pauseAudio(pause)
1170 * This is a callback that gets called when the plugin notifies us of a change
1171 * in the size of the remote desktop.
1174 * @return {void} Nothing.
1176 remoting.ClientSession.prototype.onDesktopSizeChanged_ = function() {
1177 console.log('desktop size changed: ' +
1178 this.plugin_.desktopWidth + 'x' +
1179 this.plugin_.desktopHeight +' @ ' +
1180 this.plugin_.desktopXDpi + 'x' +
1181 this.plugin_.desktopYDpi + ' DPI');
1182 this.updateDimensions();
1183 this.updateScrollbarVisibility();
1187 * Refreshes the plugin's dimensions, taking into account the sizes of the
1188 * remote desktop and client window, and the current scale-to-fit setting.
1190 * @return {void} Nothing.
1192 remoting.ClientSession.prototype.updateDimensions = function() {
1193 if (this.plugin_.desktopWidth == 0 ||
1194 this.plugin_.desktopHeight == 0) {
1198 var clientArea = this.getClientArea_();
1199 var desktopWidth = this.plugin_.desktopWidth;
1200 var desktopHeight = this.plugin_.desktopHeight;
1202 // When configured to display a host at its original size, we aim to display
1203 // it as close to its physical size as possible, without losing data:
1204 // - If client and host have matching DPI, render the host pixel-for-pixel.
1205 // - If the host has higher DPI then still render pixel-for-pixel.
1206 // - If the host has lower DPI then let Chrome up-scale it to natural size.
1208 // We specify the plugin dimensions in Density-Independent Pixels, so to
1209 // render pixel-for-pixel we need to down-scale the host dimensions by the
1210 // devicePixelRatio of the client. To match the host pixel density, we choose
1211 // an initial scale factor based on the client devicePixelRatio and host DPI.
1213 // Determine the effective device pixel ratio of the host, based on DPI.
1214 var hostPixelRatioX = Math.ceil(this.plugin_.desktopXDpi / 96);
1215 var hostPixelRatioY = Math.ceil(this.plugin_.desktopYDpi / 96);
1216 var hostPixelRatio = Math.min(hostPixelRatioX, hostPixelRatioY);
1218 // Down-scale by the smaller of the client and host ratios.
1219 var scale = 1.0 / Math.min(window.devicePixelRatio, hostPixelRatio);
1221 if (this.shrinkToFit_) {
1222 // Reduce the scale, if necessary, to fit the whole desktop in the window.
1223 var scaleFitWidth = Math.min(scale, 1.0 * clientArea.width / desktopWidth);
1224 var scaleFitHeight =
1225 Math.min(scale, 1.0 * clientArea.height / desktopHeight);
1226 scale = Math.min(scaleFitHeight, scaleFitWidth);
1228 // If we're running full-screen then try to handle common side-by-side
1229 // multi-monitor combinations more intelligently.
1230 if (remoting.fullscreen.isActive()) {
1231 // If the host has two monitors each the same size as the client then
1232 // scale-to-fit will have the desktop occupy only 50% of the client area,
1233 // in which case it would be preferable to down-scale less and let the
1234 // user bump-scroll around ("scale-and-pan").
1235 // Triggering scale-and-pan if less than 65% of the client area would be
1236 // used adds enough fuzz to cope with e.g. 1280x800 client connecting to
1237 // a (2x1280)x1024 host nicely.
1238 // Note that we don't need to account for scrollbars while fullscreen.
1239 if (scale <= scaleFitHeight * 0.65) {
1240 scale = scaleFitHeight;
1242 if (scale <= scaleFitWidth * 0.65) {
1243 scale = scaleFitWidth;
1248 var pluginWidth = Math.round(desktopWidth * scale);
1249 var pluginHeight = Math.round(desktopHeight * scale);
1252 this.video_.style.width = pluginWidth + 'px';
1253 this.video_.style.height = pluginHeight + 'px';
1256 // Resize the plugin if necessary.
1257 // TODO(wez): Handle high-DPI to high-DPI properly (crbug.com/135089).
1258 this.plugin_.element().style.width = pluginWidth + 'px';
1259 this.plugin_.element().style.height = pluginHeight + 'px';
1261 // Position the container.
1262 // Note that clientWidth/Height take into account scrollbars.
1263 var clientWidth = document.documentElement.clientWidth;
1264 var clientHeight = document.documentElement.clientHeight;
1265 var parentNode = this.plugin_.element().parentNode;
1267 console.log('plugin dimensions: ' +
1268 parentNode.style.left + ',' +
1269 parentNode.style.top + '-' +
1270 pluginWidth + 'x' + pluginHeight + '.');
1274 * Returns an associative array with a set of stats for this connection.
1276 * @return {remoting.ClientSession.PerfStats} The connection statistics.
1278 remoting.ClientSession.prototype.getPerfStats = function() {
1279 return this.plugin_.getPerfStats();
1285 * @param {remoting.ClientSession.PerfStats} stats
1287 remoting.ClientSession.prototype.logStatistics = function(stats) {
1288 this.logToServer.logStatistics(stats, this.mode_);
1292 * Enable or disable logging of connection errors due to a host being offline.
1293 * For example, if attempting a connection using a cached JID, host-offline
1294 * errors should not be logged because the JID will be refreshed and the
1295 * connection retried.
1297 * @param {boolean} enable True to log host-offline errors; false to suppress.
1299 remoting.ClientSession.prototype.logHostOfflineErrors = function(enable) {
1300 this.logHostOfflineErrors_ = enable;
1304 * Request pairing with the host for PIN-less authentication.
1306 * @param {string} clientName The human-readable name of the client.
1307 * @param {function(string, string):void} onDone Callback to receive the
1308 * client id and shared secret when they are available.
1310 remoting.ClientSession.prototype.requestPairing = function(clientName, onDone) {
1312 this.plugin_.requestPairing(clientName, onDone);
1317 * Called when the full-screen status has changed, either via the
1318 * remoting.Fullscreen class, or via a system event such as the Escape key
1320 * @param {boolean} fullscreen True if the app is entering full-screen mode;
1321 * false if it is leaving it.
1324 remoting.ClientSession.prototype.onFullScreenChanged_ = function (fullscreen) {
1325 var htmlNode = /** @type {HTMLElement} */ (document.documentElement);
1326 this.enableBumpScroll_(fullscreen);
1328 htmlNode.classList.add('full-screen');
1330 htmlNode.classList.remove('full-screen');
1335 * Updates the options menu to reflect the current scale-to-fit and full-screen
1337 * @return {void} Nothing.
1340 remoting.ClientSession.prototype.onShowOptionsMenu_ = function() {
1341 remoting.MenuButton.select(this.resizeToClientButton_, this.resizeToClient_);
1342 remoting.MenuButton.select(this.shrinkToFitButton_, this.shrinkToFit_);
1343 remoting.MenuButton.select(this.fullScreenButton_,
1344 remoting.fullscreen.isActive());
1348 * Scroll the client plugin by the specified amount, keeping it visible.
1349 * Note that this is only used in content full-screen mode (not windowed or
1350 * browser full-screen modes), where window.scrollBy and the scrollTop and
1351 * scrollLeft properties don't work.
1352 * @param {number} dx The amount by which to scroll horizontally. Positive to
1353 * scroll right; negative to scroll left.
1354 * @param {number} dy The amount by which to scroll vertically. Positive to
1355 * scroll down; negative to scroll up.
1356 * @return {boolean} True if the requested scroll had no effect because both
1357 * vertical and horizontal edges of the screen have been reached.
1360 remoting.ClientSession.prototype.scroll_ = function(dx, dy) {
1361 var plugin = this.plugin_.element();
1362 var style = plugin.style;
1365 * Helper function for x- and y-scrolling
1366 * @param {number|string} curr The current margin, eg. "10px".
1367 * @param {number} delta The requested scroll amount.
1368 * @param {number} windowBound The size of the window, in pixels.
1369 * @param {number} pluginBound The size of the plugin, in pixels.
1370 * @param {{stop: boolean}} stop Reference parameter used to indicate when
1371 * the scroll has reached one of the edges and can be stopped in that
1373 * @return {string} The new margin value.
1375 var adjustMargin = function(curr, delta, windowBound, pluginBound, stop) {
1376 var minMargin = Math.min(0, windowBound - pluginBound);
1377 var result = (curr ? parseFloat(curr) : 0) - delta;
1378 result = Math.min(0, Math.max(minMargin, result));
1379 stop.stop = (result == 0 || result == minMargin);
1380 return result + 'px';
1383 var stopX = { stop: false };
1384 var clientArea = this.getClientArea_();
1385 style.marginLeft = adjustMargin(style.marginLeft, dx,
1386 clientArea.width, plugin.clientWidth, stopX);
1388 var stopY = { stop: false };
1389 style.marginTop = adjustMargin(
1390 style.marginTop, dy, clientArea.height, plugin.clientHeight, stopY);
1391 return stopX.stop && stopY.stop;
1394 remoting.ClientSession.prototype.resetScroll_ = function() {
1396 var plugin = this.plugin_.element();
1397 plugin.style.marginTop = '0px';
1398 plugin.style.marginLeft = '0px';
1403 * Enable or disable bump-scrolling. When disabling bump scrolling, also reset
1404 * the scroll offsets to (0, 0).
1406 * @param {boolean} enable True to enable bump-scrolling, false to disable it.
1408 remoting.ClientSession.prototype.enableBumpScroll_ = function(enable) {
1409 var element = /*@type{HTMLElement} */ document.documentElement;
1411 /** @type {null|function(Event):void} */
1412 this.onMouseMoveRef_ = this.onMouseMove_.bind(this);
1413 element.addEventListener('mousemove', this.onMouseMoveRef_, false);
1415 element.removeEventListener('mousemove', this.onMouseMoveRef_, false);
1416 this.onMouseMoveRef_ = null;
1417 this.resetScroll_();
1422 * @param {Event} event The mouse event.
1425 remoting.ClientSession.prototype.onMouseMove_ = function(event) {
1426 if (this.bumpScrollTimer_) {
1427 window.clearTimeout(this.bumpScrollTimer_);
1428 this.bumpScrollTimer_ = null;
1432 * Compute the scroll speed based on how close the mouse is to the edge.
1433 * @param {number} mousePos The mouse x- or y-coordinate
1434 * @param {number} size The width or height of the content area.
1435 * @return {number} The scroll delta, in pixels.
1437 var computeDelta = function(mousePos, size) {
1439 if (mousePos >= size - threshold) {
1440 return 1 + 5 * (mousePos - (size - threshold)) / threshold;
1441 } else if (mousePos <= threshold) {
1442 return -1 - 5 * (threshold - mousePos) / threshold;
1447 var clientArea = this.getClientArea_();
1448 var dx = computeDelta(event.x, clientArea.width);
1449 var dy = computeDelta(event.y, clientArea.height);
1451 if (dx != 0 || dy != 0) {
1452 /** @type {remoting.ClientSession} */
1455 * Scroll the view, and schedule a timer to do so again unless we've hit
1456 * the edges of the screen. This timer is cancelled when the mouse moves.
1457 * @param {number} expected The time at which we expect to be called.
1459 var repeatScroll = function(expected) {
1460 /** @type {number} */
1461 var now = new Date().getTime();
1462 /** @type {number} */
1464 var lateAdjustment = 1 + (now - expected) / timeout;
1465 if (!that.scroll_(lateAdjustment * dx, lateAdjustment * dy)) {
1466 that.bumpScrollTimer_ = window.setTimeout(
1467 function() { repeatScroll(now + timeout); },
1471 repeatScroll(new Date().getTime());
1476 * Sends a clipboard item to the host.
1478 * @param {string} mimeType The MIME type of the clipboard item.
1479 * @param {string} item The clipboard item.
1481 remoting.ClientSession.prototype.sendClipboardItem = function(mimeType, item) {
1484 this.plugin_.sendClipboardItem(mimeType, item);
1488 * Send a gnubby-auth extension message to the host.
1489 * @param {Object} data The gnubby-auth message data.
1491 remoting.ClientSession.prototype.sendGnubbyAuthMessage = function(data) {
1494 this.plugin_.sendClientMessage('gnubby-auth', JSON.stringify(data));
1498 * Process a remote gnubby auth request.
1499 * @param {string} data Remote gnubby request data.
1502 remoting.ClientSession.prototype.processGnubbyAuthMessage_ = function(data) {
1503 if (this.gnubbyAuthHandler_) {
1505 this.gnubbyAuthHandler_.onMessage(data);
1507 console.error('Failed to process gnubby message: ',
1508 /** @type {*} */ (err));
1511 console.error('Received unexpected gnubby message');
1516 * Create a gnubby auth handler and inform the host that gnubby auth is
1520 remoting.ClientSession.prototype.createGnubbyAuthHandler_ = function() {
1521 if (this.mode_ == remoting.ClientSession.Mode.ME2ME) {
1522 this.gnubbyAuthHandler_ = new remoting.GnubbyAuthHandler(this);
1523 // TODO(psj): Move to more generic capabilities mechanism.
1524 this.sendGnubbyAuthMessage({'type': 'control', 'option': 'auth-v1'});
1529 * @return {{width: number, height: number}} The height of the window's client
1530 * area. This differs between apps v1 and apps v2 due to the custom window
1531 * borders used by the latter.
1534 remoting.ClientSession.prototype.getClientArea_ = function() {
1535 return remoting.windowFrame ?
1536 remoting.windowFrame.getClientArea() :
1537 { 'width': window.innerWidth, 'height': window.innerHeight };
1541 * @param {string} url
1542 * @param {number} hotspotX
1543 * @param {number} hotspotY
1545 remoting.ClientSession.prototype.updateMouseCursorImage_ =
1546 function(url, hotspotX, hotspotY) {
1547 this.mouseCursorOverlay_.hidden = !url;
1549 this.mouseCursorOverlay_.style.marginLeft = '-' + hotspotX + 'px';
1550 this.mouseCursorOverlay_.style.marginTop = '-' + hotspotY + 'px';
1551 this.mouseCursorOverlay_.src = url;