diff options
Diffstat (limited to 'webclients/novnc/include/util.js')
| -rw-r--r-- | webclients/novnc/include/util.js | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/webclients/novnc/include/util.js b/webclients/novnc/include/util.js new file mode 100644 index 0000000..0a9e0e0 --- /dev/null +++ b/webclients/novnc/include/util.js @@ -0,0 +1,276 @@ +/* + * noVNC: HTML5 VNC client + * Copyright (C) 2011 Joel Martin + * Licensed under LGPL-3 (see LICENSE.txt) + * + * See README.md for usage and integration instructions. + */ + +"use strict"; +/*jslint bitwise: false, white: false */ +/*global window, console, document, navigator, ActiveXObject */ + +// Globals defined here +var Util = {}; + + +/* + * Make arrays quack + */ + +Array.prototype.push8 = function (num) { + this.push(num & 0xFF); +}; + +Array.prototype.push16 = function (num) { + this.push((num >> 8) & 0xFF, + (num ) & 0xFF ); +}; +Array.prototype.push32 = function (num) { + this.push((num >> 24) & 0xFF, + (num >> 16) & 0xFF, + (num >> 8) & 0xFF, + (num ) & 0xFF ); +}; + +/* + * ------------------------------------------------------ + * Namespaced in Util + * ------------------------------------------------------ + */ + +/* + * Logging/debug routines + */ + +Util._log_level = 'warn'; +Util.init_logging = function (level) { + if (typeof level === 'undefined') { + level = Util._log_level; + } else { + Util._log_level = level; + } + if (typeof window.console === "undefined") { + if (typeof window.opera !== "undefined") { + window.console = { + 'log' : window.opera.postError, + 'warn' : window.opera.postError, + 'error': window.opera.postError }; + } else { + window.console = { + 'log' : function(m) {}, + 'warn' : function(m) {}, + 'error': function(m) {}}; + } + } + + Util.Debug = Util.Info = Util.Warn = Util.Error = function (msg) {}; + switch (level) { + case 'debug': Util.Debug = function (msg) { console.log(msg); }; + case 'info': Util.Info = function (msg) { console.log(msg); }; + case 'warn': Util.Warn = function (msg) { console.warn(msg); }; + case 'error': Util.Error = function (msg) { console.error(msg); }; + case 'none': + break; + default: + throw("invalid logging type '" + level + "'"); + } +}; +Util.get_logging = function () { + return Util._log_level; +}; +// Initialize logging level +Util.init_logging(); + + +// Set configuration default for Crockford style function namespaces +Util.conf_default = function(cfg, api, defaults, v, mode, type, defval, desc) { + var getter, setter; + + // Default getter function + getter = function (idx) { + if ((type in {'arr':1, 'array':1}) && + (typeof idx !== 'undefined')) { + return cfg[v][idx]; + } else { + return cfg[v]; + } + }; + + // Default setter function + setter = function (val, idx) { + if (type in {'boolean':1, 'bool':1}) { + if ((!val) || (val in {'0':1, 'no':1, 'false':1})) { + val = false; + } else { + val = true; + } + } else if (type in {'integer':1, 'int':1}) { + val = parseInt(val, 10); + } else if (type === 'func') { + if (!val) { + val = function () {}; + } + } + if (typeof idx !== 'undefined') { + cfg[v][idx] = val; + } else { + cfg[v] = val; + } + }; + + // Set the description + api[v + '_description'] = desc; + + // Set the getter function + if (typeof api['get_' + v] === 'undefined') { + api['get_' + v] = getter; + } + + // Set the setter function with extra sanity checks + if (typeof api['set_' + v] === 'undefined') { + api['set_' + v] = function (val, idx) { + if (mode in {'RO':1, 'ro':1}) { + throw(v + " is read-only"); + } else if ((mode in {'WO':1, 'wo':1}) && + (typeof cfg[v] !== 'undefined')) { + throw(v + " can only be set once"); + } + setter(val, idx); + }; + } + + // Set the default value + if (typeof defaults[v] !== 'undefined') { + defval = defaults[v]; + } else if ((type in {'arr':1, 'array':1}) && + (! (defval instanceof Array))) { + defval = []; + } + // Coerce existing setting to the right type + //Util.Debug("v: " + v + ", defval: " + defval + ", defaults[v]: " + defaults[v]); + setter(defval); +}; + +// Set group of configuration defaults +Util.conf_defaults = function(cfg, api, defaults, arr) { + var i; + for (i = 0; i < arr.length; i++) { + Util.conf_default(cfg, api, defaults, arr[i][0], arr[i][1], + arr[i][2], arr[i][3], arr[i][4]); + } +} + + +/* + * Cross-browser routines + */ + +// Get DOM element position on page +Util.getPosition = function (obj) { + var x = 0, y = 0; + if (obj.offsetParent) { + do { + x += obj.offsetLeft; + y += obj.offsetTop; + obj = obj.offsetParent; + } while (obj); + } + return {'x': x, 'y': y}; +}; + +// Get mouse event position in DOM element +Util.getEventPosition = function (e, obj, scale) { + var evt, docX, docY, pos; + //if (!e) evt = window.event; + evt = (e ? e : window.event); + evt = (evt.changedTouches ? evt.changedTouches[0] : evt.touches ? evt.touches[0] : evt); + if (evt.pageX || evt.pageY) { + docX = evt.pageX; + docY = evt.pageY; + } else if (evt.clientX || evt.clientY) { + docX = evt.clientX + document.body.scrollLeft + + document.documentElement.scrollLeft; + docY = evt.clientY + document.body.scrollTop + + document.documentElement.scrollTop; + } + pos = Util.getPosition(obj); + if (typeof scale === "undefined") { + scale = 1; + } + return {'x': (docX - pos.x) / scale, 'y': (docY - pos.y) / scale}; +}; + + +// Event registration. Based on: http://www.scottandrew.com/weblog/articles/cbs-events +Util.addEvent = function (obj, evType, fn){ + if (obj.attachEvent){ + var r = obj.attachEvent("on"+evType, fn); + return r; + } else if (obj.addEventListener){ + obj.addEventListener(evType, fn, false); + return true; + } else { + throw("Handler could not be attached"); + } +}; + +Util.removeEvent = function(obj, evType, fn){ + if (obj.detachEvent){ + var r = obj.detachEvent("on"+evType, fn); + return r; + } else if (obj.removeEventListener){ + obj.removeEventListener(evType, fn, false); + return true; + } else { + throw("Handler could not be removed"); + } +}; + +Util.stopEvent = function(e) { + if (e.stopPropagation) { e.stopPropagation(); } + else { e.cancelBubble = true; } + + if (e.preventDefault) { e.preventDefault(); } + else { e.returnValue = false; } +}; + + +// Set browser engine versions. Based on mootools. +Util.Features = {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)}; + +Util.Engine = { + 'presto': (function() { + return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925)); }()), + 'trident': (function() { + return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4); }()), + 'webkit': (function() { + try { return (navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); } catch (e) { return false; } }()), + //'webkit': (function() { + // return ((typeof navigator.taintEnabled !== "unknown") && navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); }()), + 'gecko': (function() { + return (!document.getBoxObjectFor && window.mozInnerScreenX == null) ? false : ((document.getElementsByClassName) ? 19 : 18); }()) +}; +if (Util.Engine.webkit) { + // Extract actual webkit version if available + Util.Engine.webkit = (function(v) { + var re = new RegExp('WebKit/([0-9\.]*) '); + v = (navigator.userAgent.match(re) || ['', v])[1]; + return parseFloat(v, 10); + })(Util.Engine.webkit); +} + +Util.Flash = (function(){ + var v, version; + try { + v = navigator.plugins['Shockwave Flash'].description; + } catch(err1) { + try { + v = new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version'); + } catch(err2) { + v = '0 r0'; + } + } + version = v.match(/\d+/g); + return {version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0}; +}()); |