2010-06-15 17:10:18 +01:00
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/*
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2012-10-11 18:20:47 +01:00
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* from noVNC: HTML5 VNC client
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* Copyright (C) 2012 Joel Martin
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* Licensed under MPL 2.0 (see LICENSE.txt)
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2010-06-15 21:21:41 +01:00
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*
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* See README.md for usage and integration instructions.
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2010-06-15 17:10:18 +01:00
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*/
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2010-06-15 21:21:41 +01:00
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"use strict";
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/*jslint bitwise: false, white: false */
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2010-09-29 21:05:27 +01:00
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/*global window, console, document, navigator, ActiveXObject */
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2010-06-15 17:10:18 +01:00
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2010-06-15 21:21:41 +01:00
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// Globals defined here
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2012-02-14 13:51:44 +00:00
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var Util = {};
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2010-06-15 21:21:41 +01:00
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2010-07-06 17:56:13 +01:00
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2010-05-15 20:55:33 +01:00
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/*
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* Make arrays quack
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*/
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Array.prototype.push8 = function (num) {
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this.push(num & 0xFF);
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};
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Array.prototype.push16 = function (num) {
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this.push((num >> 8) & 0xFF,
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(num ) & 0xFF );
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};
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Array.prototype.push32 = function (num) {
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this.push((num >> 24) & 0xFF,
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(num >> 16) & 0xFF,
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(num >> 8) & 0xFF,
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(num ) & 0xFF );
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};
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2012-02-14 13:51:44 +00:00
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// IE does not support map (even in IE9)
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//This prototype is provided by the Mozilla foundation and
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//is distributed under the MIT license.
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//http://www.ibiblio.org/pub/Linux/LICENSES/mit.license
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if (!Array.prototype.map)
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{
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Array.prototype.map = function(fun /*, thisp*/)
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{
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var len = this.length;
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if (typeof fun != "function")
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throw new TypeError();
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var res = new Array(len);
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var thisp = arguments[1];
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for (var i = 0; i < len; i++)
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{
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if (i in this)
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res[i] = fun.call(thisp, this[i], i, this);
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}
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return res;
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};
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}
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2012-10-11 18:30:11 +01:00
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//
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// requestAnimationFrame shim with setTimeout fallback
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//
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window.requestAnimFrame = (function(){
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return window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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function(callback){
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window.setTimeout(callback, 1000 / 60);
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};
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})();
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2010-06-15 21:21:41 +01:00
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/*
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* ------------------------------------------------------
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* Namespaced in Util
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* ------------------------------------------------------
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*/
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New API. Refactor Canvas and RFB objects.
New API:
To use the RFB object, you now must instantiate it (this allows more
than one instance of it on the same page).
rfb = new RFB(settings);
The 'settings' variable is a namespace that contains initial default
settings. These can also be set and read using 'rfb.set_FOO()' and
'rfb.get_FOO()' where FOO is the setting name. The current settings
are (and defaults) are:
- target: the DOM Canvas element to use ('VNC_canvas').
- encrypt: whether to encrypt the connection (false)
- true_color: true_color or palette (true)
- b64encode: base64 encode the WebSockets data (true)
- local_cursor: use local cursor rendering (true if supported)
- connectTimeout: milliseconds to wait for connect (2000)
- updateState: callback when RFB state changes (none)
- clipboardReceive: callback when clipboard data received (none)
The parameters to the updateState callback have also changed. The
function spec is now updateState(rfb, state, oldstate, msg):
- rfb: the RFB object that this state change is for.
- state: the new state
- oldstate: the previous state
- msg: a message associate with the state (not always set).
The clipboardReceive spec is clipboardReceive(rfb, text):
- rfb: the RFB object that this text is from.
- text: the clipboard text received.
Changes:
- The RFB and Canvas namespaces are now more proper objects. Private
implementation is no longer exposed and the public API has been made
explicit. Also, instantiation allows more than one VNC connection
on the same page (to complete this, DefaultControls will also need
this same refactoring).
- Added 'none' logging level.
- Removed automatic stylesheet selection workaround in util.js and
move it to defaultcontrols so that it doesn't interfere with
intergration.
- Also, some major JSLinting.
- Fix input, canvas, and cursor tests to work with new model.
2010-08-02 23:07:27 +01:00
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/*
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* Logging/debug routines
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*/
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2010-09-22 23:11:57 +01:00
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Util._log_level = 'warn';
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New API. Refactor Canvas and RFB objects.
New API:
To use the RFB object, you now must instantiate it (this allows more
than one instance of it on the same page).
rfb = new RFB(settings);
The 'settings' variable is a namespace that contains initial default
settings. These can also be set and read using 'rfb.set_FOO()' and
'rfb.get_FOO()' where FOO is the setting name. The current settings
are (and defaults) are:
- target: the DOM Canvas element to use ('VNC_canvas').
- encrypt: whether to encrypt the connection (false)
- true_color: true_color or palette (true)
- b64encode: base64 encode the WebSockets data (true)
- local_cursor: use local cursor rendering (true if supported)
- connectTimeout: milliseconds to wait for connect (2000)
- updateState: callback when RFB state changes (none)
- clipboardReceive: callback when clipboard data received (none)
The parameters to the updateState callback have also changed. The
function spec is now updateState(rfb, state, oldstate, msg):
- rfb: the RFB object that this state change is for.
- state: the new state
- oldstate: the previous state
- msg: a message associate with the state (not always set).
The clipboardReceive spec is clipboardReceive(rfb, text):
- rfb: the RFB object that this text is from.
- text: the clipboard text received.
Changes:
- The RFB and Canvas namespaces are now more proper objects. Private
implementation is no longer exposed and the public API has been made
explicit. Also, instantiation allows more than one VNC connection
on the same page (to complete this, DefaultControls will also need
this same refactoring).
- Added 'none' logging level.
- Removed automatic stylesheet selection workaround in util.js and
move it to defaultcontrols so that it doesn't interfere with
intergration.
- Also, some major JSLinting.
- Fix input, canvas, and cursor tests to work with new model.
2010-08-02 23:07:27 +01:00
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Util.init_logging = function (level) {
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2010-09-22 23:11:57 +01:00
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if (typeof level === 'undefined') {
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level = Util._log_level;
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} else {
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Util._log_level = level;
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}
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New API. Refactor Canvas and RFB objects.
New API:
To use the RFB object, you now must instantiate it (this allows more
than one instance of it on the same page).
rfb = new RFB(settings);
The 'settings' variable is a namespace that contains initial default
settings. These can also be set and read using 'rfb.set_FOO()' and
'rfb.get_FOO()' where FOO is the setting name. The current settings
are (and defaults) are:
- target: the DOM Canvas element to use ('VNC_canvas').
- encrypt: whether to encrypt the connection (false)
- true_color: true_color or palette (true)
- b64encode: base64 encode the WebSockets data (true)
- local_cursor: use local cursor rendering (true if supported)
- connectTimeout: milliseconds to wait for connect (2000)
- updateState: callback when RFB state changes (none)
- clipboardReceive: callback when clipboard data received (none)
The parameters to the updateState callback have also changed. The
function spec is now updateState(rfb, state, oldstate, msg):
- rfb: the RFB object that this state change is for.
- state: the new state
- oldstate: the previous state
- msg: a message associate with the state (not always set).
The clipboardReceive spec is clipboardReceive(rfb, text):
- rfb: the RFB object that this text is from.
- text: the clipboard text received.
Changes:
- The RFB and Canvas namespaces are now more proper objects. Private
implementation is no longer exposed and the public API has been made
explicit. Also, instantiation allows more than one VNC connection
on the same page (to complete this, DefaultControls will also need
this same refactoring).
- Added 'none' logging level.
- Removed automatic stylesheet selection workaround in util.js and
move it to defaultcontrols so that it doesn't interfere with
intergration.
- Also, some major JSLinting.
- Fix input, canvas, and cursor tests to work with new model.
2010-08-02 23:07:27 +01:00
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if (typeof window.console === "undefined") {
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if (typeof window.opera !== "undefined") {
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window.console = {
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'log' : window.opera.postError,
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'warn' : window.opera.postError,
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'error': window.opera.postError };
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} else {
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window.console = {
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'log' : function(m) {},
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'warn' : function(m) {},
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'error': function(m) {}};
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}
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}
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Util.Debug = Util.Info = Util.Warn = Util.Error = function (msg) {};
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switch (level) {
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case 'debug': Util.Debug = function (msg) { console.log(msg); };
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case 'info': Util.Info = function (msg) { console.log(msg); };
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case 'warn': Util.Warn = function (msg) { console.warn(msg); };
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case 'error': Util.Error = function (msg) { console.error(msg); };
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case 'none':
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break;
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default:
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throw("invalid logging type '" + level + "'");
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}
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};
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2010-09-22 23:11:57 +01:00
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Util.get_logging = function () {
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2010-09-29 20:11:23 +01:00
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return Util._log_level;
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2012-02-14 13:51:44 +00:00
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};
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New API. Refactor Canvas and RFB objects.
New API:
To use the RFB object, you now must instantiate it (this allows more
than one instance of it on the same page).
rfb = new RFB(settings);
The 'settings' variable is a namespace that contains initial default
settings. These can also be set and read using 'rfb.set_FOO()' and
'rfb.get_FOO()' where FOO is the setting name. The current settings
are (and defaults) are:
- target: the DOM Canvas element to use ('VNC_canvas').
- encrypt: whether to encrypt the connection (false)
- true_color: true_color or palette (true)
- b64encode: base64 encode the WebSockets data (true)
- local_cursor: use local cursor rendering (true if supported)
- connectTimeout: milliseconds to wait for connect (2000)
- updateState: callback when RFB state changes (none)
- clipboardReceive: callback when clipboard data received (none)
The parameters to the updateState callback have also changed. The
function spec is now updateState(rfb, state, oldstate, msg):
- rfb: the RFB object that this state change is for.
- state: the new state
- oldstate: the previous state
- msg: a message associate with the state (not always set).
The clipboardReceive spec is clipboardReceive(rfb, text):
- rfb: the RFB object that this text is from.
- text: the clipboard text received.
Changes:
- The RFB and Canvas namespaces are now more proper objects. Private
implementation is no longer exposed and the public API has been made
explicit. Also, instantiation allows more than one VNC connection
on the same page (to complete this, DefaultControls will also need
this same refactoring).
- Added 'none' logging level.
- Removed automatic stylesheet selection workaround in util.js and
move it to defaultcontrols so that it doesn't interfere with
intergration.
- Also, some major JSLinting.
- Fix input, canvas, and cursor tests to work with new model.
2010-08-02 23:07:27 +01:00
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// Initialize logging level
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2010-09-22 23:11:57 +01:00
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Util.init_logging();
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New API. Refactor Canvas and RFB objects.
New API:
To use the RFB object, you now must instantiate it (this allows more
than one instance of it on the same page).
rfb = new RFB(settings);
The 'settings' variable is a namespace that contains initial default
settings. These can also be set and read using 'rfb.set_FOO()' and
'rfb.get_FOO()' where FOO is the setting name. The current settings
are (and defaults) are:
- target: the DOM Canvas element to use ('VNC_canvas').
- encrypt: whether to encrypt the connection (false)
- true_color: true_color or palette (true)
- b64encode: base64 encode the WebSockets data (true)
- local_cursor: use local cursor rendering (true if supported)
- connectTimeout: milliseconds to wait for connect (2000)
- updateState: callback when RFB state changes (none)
- clipboardReceive: callback when clipboard data received (none)
The parameters to the updateState callback have also changed. The
function spec is now updateState(rfb, state, oldstate, msg):
- rfb: the RFB object that this state change is for.
- state: the new state
- oldstate: the previous state
- msg: a message associate with the state (not always set).
The clipboardReceive spec is clipboardReceive(rfb, text):
- rfb: the RFB object that this text is from.
- text: the clipboard text received.
Changes:
- The RFB and Canvas namespaces are now more proper objects. Private
implementation is no longer exposed and the public API has been made
explicit. Also, instantiation allows more than one VNC connection
on the same page (to complete this, DefaultControls will also need
this same refactoring).
- Added 'none' logging level.
- Removed automatic stylesheet selection workaround in util.js and
move it to defaultcontrols so that it doesn't interfere with
intergration.
- Also, some major JSLinting.
- Fix input, canvas, and cursor tests to work with new model.
2010-08-02 23:07:27 +01:00
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2010-07-22 17:33:21 +01:00
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2012-02-14 13:51:44 +00:00
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// Set configuration default for Crockford style function namespaces
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Util.conf_default = function(cfg, api, defaults, v, mode, type, defval, desc) {
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var getter, setter;
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// Default getter function
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getter = function (idx) {
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if ((type in {'arr':1, 'array':1}) &&
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(typeof idx !== 'undefined')) {
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return cfg[v][idx];
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} else {
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return cfg[v];
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}
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};
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// Default setter function
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setter = function (val, idx) {
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if (type in {'boolean':1, 'bool':1}) {
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if ((!val) || (val in {'0':1, 'no':1, 'false':1})) {
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val = false;
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} else {
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val = true;
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}
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} else if (type in {'integer':1, 'int':1}) {
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val = parseInt(val, 10);
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2012-10-11 18:30:11 +01:00
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} else if (type === 'str') {
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val = String(val);
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2012-02-14 13:51:44 +00:00
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} else if (type === 'func') {
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if (!val) {
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val = function () {};
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}
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}
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if (typeof idx !== 'undefined') {
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cfg[v][idx] = val;
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} else {
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cfg[v] = val;
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}
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};
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// Set the description
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api[v + '_description'] = desc;
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// Set the getter function
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2010-07-30 15:53:33 +01:00
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if (typeof api['get_' + v] === 'undefined') {
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2012-02-14 13:51:44 +00:00
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api['get_' + v] = getter;
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2010-07-30 15:53:33 +01:00
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}
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2012-02-14 13:51:44 +00:00
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// Set the setter function with extra sanity checks
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2010-07-30 15:53:33 +01:00
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if (typeof api['set_' + v] === 'undefined') {
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2012-02-14 13:51:44 +00:00
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api['set_' + v] = function (val, idx) {
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if (mode in {'RO':1, 'ro':1}) {
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throw(v + " is read-only");
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} else if ((mode in {'WO':1, 'wo':1}) &&
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(typeof cfg[v] !== 'undefined')) {
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throw(v + " can only be set once");
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}
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setter(val, idx);
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};
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2010-07-30 15:53:33 +01:00
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}
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2010-09-23 15:39:24 +01:00
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2012-02-14 13:51:44 +00:00
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// Set the default value
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if (typeof defaults[v] !== 'undefined') {
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defval = defaults[v];
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} else if ((type in {'arr':1, 'array':1}) &&
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(! (defval instanceof Array))) {
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defval = [];
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2010-09-23 15:39:24 +01:00
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}
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2012-02-14 13:51:44 +00:00
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// Coerce existing setting to the right type
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//Util.Debug("v: " + v + ", defval: " + defval + ", defaults[v]: " + defaults[v]);
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setter(defval);
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2010-07-30 15:53:33 +01:00
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};
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2012-02-14 13:51:44 +00:00
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// Set group of configuration defaults
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Util.conf_defaults = function(cfg, api, defaults, arr) {
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var i;
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for (i = 0; i < arr.length; i++) {
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Util.conf_default(cfg, api, defaults, arr[i][0], arr[i][1],
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arr[i][2], arr[i][3], arr[i][4]);
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}
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};
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2010-07-30 15:53:33 +01:00
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2010-07-22 17:33:21 +01:00
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2010-06-15 21:21:41 +01:00
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/*
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* Cross-browser routines
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*/
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2012-10-17 17:52:28 +01:00
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// Dynamically load scripts without using document.write()
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// Reference: http://unixpapa.com/js/dyna.html
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//
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// Handles the case where load_scripts is invoked from a script that
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// itself is loaded via load_scripts. Once all scripts are loaded the
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// window.onscriptsloaded handler is called (if set).
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Util.get_include_uri = function() {
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return (typeof INCLUDE_URI !== "undefined") ? INCLUDE_URI : "include/";
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}
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2012-11-01 16:07:26 +00:00
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Util._loading_scripts = [];
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2012-10-17 17:52:28 +01:00
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Util._pending_scripts = [];
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Util.load_scripts = function(files) {
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2012-11-01 16:07:26 +00:00
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var head = document.getElementsByTagName('head')[0], script,
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ls = Util._loading_scripts, ps = Util._pending_scripts;
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2012-10-17 17:52:28 +01:00
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for (var f=0; f<files.length; f++) {
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2012-11-01 16:07:26 +00:00
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script = document.createElement('script');
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2012-10-17 17:52:28 +01:00
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script.type = 'text/javascript';
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script.src = Util.get_include_uri() + files[f];
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2012-11-01 16:07:26 +00:00
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//console.log("loading script: " + script.src);
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2012-10-17 17:52:28 +01:00
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script.onload = script.onreadystatechange = function (e) {
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2012-11-01 16:07:26 +00:00
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while (ls.length > 0 && (ls[0].readyState === 'loaded' ||
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ls[0].readyState === 'complete')) {
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// For IE, append the script to trigger execution
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var s = ls.shift();
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//console.log("loaded script: " + s.src);
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head.appendChild(s);
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}
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if (!this.readyState ||
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(Util.Engine.presto && this.readyState === 'loaded') ||
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this.readyState === 'complete') {
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2012-10-17 17:52:28 +01:00
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if (ps.indexOf(this) >= 0) {
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2012-11-01 16:07:26 +00:00
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this.onload = this.onreadystatechange = null;
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//console.log("completed script: " + this.src);
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2012-10-17 17:52:28 +01:00
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ps.splice(ps.indexOf(this), 1);
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2012-11-01 16:07:26 +00:00
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// Call window.onscriptsload after last script loads
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if (ps.length === 0 && window.onscriptsload) {
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window.onscriptsload();
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}
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2012-10-17 17:52:28 +01:00
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}
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}
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2012-11-01 16:07:26 +00:00
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};
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// In-order script execution tricks
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if (Util.Engine.trident) {
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// For IE wait until readyState is 'loaded' before
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// appending it which will trigger execution
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// http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order
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ls.push(script);
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} else {
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// For webkit and firefox set async=false and append now
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// https://developer.mozilla.org/en-US/docs/HTML/Element/script
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script.async = false;
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head.appendChild(script);
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2012-10-17 17:52:28 +01:00
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}
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2012-11-01 16:07:26 +00:00
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ps.push(script);
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2012-10-17 17:52:28 +01:00
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}
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}
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2010-06-15 21:21:41 +01:00
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// Get DOM element position on page
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Util.getPosition = function (obj) {
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var x = 0, y = 0;
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if (obj.offsetParent) {
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do {
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x += obj.offsetLeft;
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y += obj.offsetTop;
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obj = obj.offsetParent;
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} while (obj);
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}
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return {'x': x, 'y': y};
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};
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// Get mouse event position in DOM element
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2010-07-30 15:53:33 +01:00
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Util.getEventPosition = function (e, obj, scale) {
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2010-06-15 21:21:41 +01:00
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var evt, docX, docY, pos;
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//if (!e) evt = window.event;
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evt = (e ? e : window.event);
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2012-02-14 13:51:44 +00:00
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evt = (evt.changedTouches ? evt.changedTouches[0] : evt.touches ? evt.touches[0] : evt);
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2010-06-15 21:21:41 +01:00
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if (evt.pageX || evt.pageY) {
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docX = evt.pageX;
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docY = evt.pageY;
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} else if (evt.clientX || evt.clientY) {
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docX = evt.clientX + document.body.scrollLeft +
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document.documentElement.scrollLeft;
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docY = evt.clientY + document.body.scrollTop +
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document.documentElement.scrollTop;
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}
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pos = Util.getPosition(obj);
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2010-07-30 15:53:33 +01:00
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if (typeof scale === "undefined") {
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scale = 1;
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}
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return {'x': (docX - pos.x) / scale, 'y': (docY - pos.y) / scale};
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2010-06-15 21:21:41 +01:00
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};
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// Event registration. Based on: http://www.scottandrew.com/weblog/articles/cbs-events
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Util.addEvent = function (obj, evType, fn){
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2010-06-23 22:08:36 +01:00
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if (obj.attachEvent){
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2010-06-15 21:21:41 +01:00
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var r = obj.attachEvent("on"+evType, fn);
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return r;
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2010-06-23 22:08:36 +01:00
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} else if (obj.addEventListener){
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obj.addEventListener(evType, fn, false);
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return true;
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2010-06-15 21:21:41 +01:00
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} else {
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throw("Handler could not be attached");
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}
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};
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Util.removeEvent = function(obj, evType, fn){
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2010-06-23 22:08:36 +01:00
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if (obj.detachEvent){
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2010-06-15 21:21:41 +01:00
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var r = obj.detachEvent("on"+evType, fn);
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return r;
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2010-06-23 22:08:36 +01:00
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} else if (obj.removeEventListener){
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obj.removeEventListener(evType, fn, false);
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return true;
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2010-06-15 21:21:41 +01:00
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} else {
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throw("Handler could not be removed");
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}
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};
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Util.stopEvent = function(e) {
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if (e.stopPropagation) { e.stopPropagation(); }
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else { e.cancelBubble = true; }
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if (e.preventDefault) { e.preventDefault(); }
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else { e.returnValue = false; }
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};
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// Set browser engine versions. Based on mootools.
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Util.Features = {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)};
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Util.Engine = {
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2012-02-14 13:51:44 +00:00
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// Version detection break in Opera 11.60 (errors on arguments.callee.caller reference)
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//'presto': (function() {
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// return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925)); }()),
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'presto': (function() { return (!window.opera) ? false : true; }()),
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2010-06-15 21:21:41 +01:00
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'trident': (function() {
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return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4); }()),
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'webkit': (function() {
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2010-06-21 22:30:32 +01:00
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try { return (navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); } catch (e) { return false; } }()),
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//'webkit': (function() {
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// return ((typeof navigator.taintEnabled !== "unknown") && navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); }()),
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2010-06-15 21:21:41 +01:00
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'gecko': (function() {
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2010-09-23 14:08:08 +01:00
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return (!document.getBoxObjectFor && window.mozInnerScreenX == null) ? false : ((document.getElementsByClassName) ? 19 : 18); }())
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2010-06-15 21:21:41 +01:00
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};
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2010-11-06 17:23:23 +00:00
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if (Util.Engine.webkit) {
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// Extract actual webkit version if available
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Util.Engine.webkit = (function(v) {
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var re = new RegExp('WebKit/([0-9\.]*) ');
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v = (navigator.userAgent.match(re) || ['', v])[1];
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return parseFloat(v, 10);
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})(Util.Engine.webkit);
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}
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2010-06-15 21:21:41 +01:00
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Util.Flash = (function(){
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var v, version;
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try {
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v = navigator.plugins['Shockwave Flash'].description;
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} catch(err1) {
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try {
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v = new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
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} catch(err2) {
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v = '0 r0';
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}
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}
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version = v.match(/\d+/g);
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return {version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0};
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2010-09-29 21:05:27 +01:00
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}());
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