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61dd52c9 | 1 | /* |
15046f00 | 2 | * noVNC: HTML5 VNC client |
d0c29bb6 | 3 | * Copyright (C) 2011 Joel Martin |
5f409eee | 4 | * Licensed under LGPL-3 (see LICENSE.txt) |
15046f00 JM |
5 | * |
6 | * See README.md for usage and integration instructions. | |
61dd52c9 JM |
7 | */ |
8 | ||
15046f00 JM |
9 | "use strict"; |
10 | /*jslint bitwise: false, white: false */ | |
a59f1cd2 | 11 | /*global window, console, document, navigator, ActiveXObject */ |
61dd52c9 | 12 | |
15046f00 | 13 | // Globals defined here |
a59f1cd2 | 14 | var Util = {}; |
15046f00 | 15 | |
81e5adaf | 16 | |
56ec48be JM |
17 | /* |
18 | * Make arrays quack | |
19 | */ | |
20 | ||
56ec48be JM |
21 | Array.prototype.push8 = function (num) { |
22 | this.push(num & 0xFF); | |
23 | }; | |
24 | ||
56ec48be JM |
25 | Array.prototype.push16 = function (num) { |
26 | this.push((num >> 8) & 0xFF, | |
27 | (num ) & 0xFF ); | |
28 | }; | |
56ec48be JM |
29 | Array.prototype.push32 = function (num) { |
30 | this.push((num >> 24) & 0xFF, | |
31 | (num >> 16) & 0xFF, | |
32 | (num >> 8) & 0xFF, | |
33 | (num ) & 0xFF ); | |
34 | }; | |
56ec48be | 35 | |
15046f00 JM |
36 | /* |
37 | * ------------------------------------------------------ | |
38 | * Namespaced in Util | |
39 | * ------------------------------------------------------ | |
40 | */ | |
41 | ||
8db09746 JM |
42 | /* |
43 | * Logging/debug routines | |
44 | */ | |
45 | ||
c1eba48f | 46 | Util._log_level = 'warn'; |
8db09746 | 47 | Util.init_logging = function (level) { |
c1eba48f | 48 | if (typeof level === 'undefined') { |
c1eba48f JM |
49 | level = Util._log_level; |
50 | } else { | |
51 | Util._log_level = level; | |
52 | } | |
8db09746 JM |
53 | if (typeof window.console === "undefined") { |
54 | if (typeof window.opera !== "undefined") { | |
55 | window.console = { | |
56 | 'log' : window.opera.postError, | |
57 | 'warn' : window.opera.postError, | |
58 | 'error': window.opera.postError }; | |
59 | } else { | |
60 | window.console = { | |
61 | 'log' : function(m) {}, | |
62 | 'warn' : function(m) {}, | |
63 | 'error': function(m) {}}; | |
64 | } | |
65 | } | |
66 | ||
67 | Util.Debug = Util.Info = Util.Warn = Util.Error = function (msg) {}; | |
68 | switch (level) { | |
69 | case 'debug': Util.Debug = function (msg) { console.log(msg); }; | |
70 | case 'info': Util.Info = function (msg) { console.log(msg); }; | |
71 | case 'warn': Util.Warn = function (msg) { console.warn(msg); }; | |
72 | case 'error': Util.Error = function (msg) { console.error(msg); }; | |
73 | case 'none': | |
74 | break; | |
75 | default: | |
76 | throw("invalid logging type '" + level + "'"); | |
77 | } | |
78 | }; | |
c1eba48f | 79 | Util.get_logging = function () { |
8d5d2c82 | 80 | return Util._log_level; |
d3796c14 | 81 | }; |
8db09746 | 82 | // Initialize logging level |
c1eba48f | 83 | Util.init_logging(); |
8db09746 | 84 | |
a8edf9d8 | 85 | |
5210330a JM |
86 | // Set configuration default for Crockford style function namespaces |
87 | Util.conf_default = function(cfg, api, defaults, v, mode, type, defval, desc) { | |
88 | var getter, setter; | |
89 | ||
90 | // Default getter function | |
91 | getter = function (idx) { | |
92 | if ((type in {'arr':1, 'array':1}) && | |
93 | (typeof idx !== 'undefined')) { | |
94 | return cfg[v][idx]; | |
95 | } else { | |
96 | return cfg[v]; | |
97 | } | |
98 | }; | |
99 | ||
100 | // Default setter function | |
101 | setter = function (val, idx) { | |
102 | if (type in {'boolean':1, 'bool':1}) { | |
103 | if ((!val) || (val in {'0':1, 'no':1, 'false':1})) { | |
104 | val = false; | |
d890e864 | 105 | } else { |
5210330a | 106 | val = true; |
d890e864 | 107 | } |
5210330a JM |
108 | } else if (type in {'integer':1, 'int':1}) { |
109 | val = parseInt(val, 10); | |
110 | } else if (type === 'func') { | |
111 | if (!val) { | |
112 | val = function () {}; | |
113 | } | |
114 | } | |
115 | if (typeof idx !== 'undefined') { | |
116 | cfg[v][idx] = val; | |
117 | } else { | |
118 | cfg[v] = val; | |
119 | } | |
120 | }; | |
121 | ||
122 | // Set the description | |
123 | api[v + '_description'] = desc; | |
124 | ||
125 | // Set the getter function | |
126 | if (typeof api['get_' + v] === 'undefined') { | |
127 | api['get_' + v] = getter; | |
125d8bbb | 128 | } |
d890e864 | 129 | |
5210330a | 130 | // Set the setter function with extra sanity checks |
125d8bbb | 131 | if (typeof api['set_' + v] === 'undefined') { |
d890e864 | 132 | api['set_' + v] = function (val, idx) { |
5210330a JM |
133 | if (mode in {'RO':1, 'ro':1}) { |
134 | throw(v + " is read-only"); | |
135 | } else if ((mode in {'WO':1, 'wo':1}) && | |
136 | (typeof cfg[v] !== 'undefined')) { | |
137 | throw(v + " can only be set once"); | |
d890e864 | 138 | } |
5210330a | 139 | setter(val, idx); |
d890e864 | 140 | }; |
125d8bbb | 141 | } |
ff36b127 | 142 | |
5210330a JM |
143 | // Set the default value |
144 | if (typeof defaults[v] !== 'undefined') { | |
145 | defval = defaults[v]; | |
146 | } else if ((type in {'arr':1, 'array':1}) && | |
147 | (! (defval instanceof Array))) { | |
148 | defval = []; | |
ff36b127 | 149 | } |
5210330a JM |
150 | // Coerce existing setting to the right type |
151 | //Util.Debug("v: " + v + ", defval: " + defval + ", defaults[v]: " + defaults[v]); | |
152 | setter(defval); | |
125d8bbb JM |
153 | }; |
154 | ||
5210330a JM |
155 | // Set group of configuration defaults |
156 | Util.conf_defaults = function(cfg, api, defaults, arr) { | |
157 | var i; | |
158 | for (i = 0; i < arr.length; i++) { | |
159 | Util.conf_default(cfg, api, defaults, arr[i][0], arr[i][1], | |
160 | arr[i][2], arr[i][3], arr[i][4]); | |
161 | } | |
162 | } | |
125d8bbb | 163 | |
a8edf9d8 | 164 | |
15046f00 JM |
165 | /* |
166 | * Cross-browser routines | |
167 | */ | |
168 | ||
169 | // Get DOM element position on page | |
170 | Util.getPosition = function (obj) { | |
171 | var x = 0, y = 0; | |
172 | if (obj.offsetParent) { | |
173 | do { | |
174 | x += obj.offsetLeft; | |
175 | y += obj.offsetTop; | |
176 | obj = obj.offsetParent; | |
177 | } while (obj); | |
178 | } | |
179 | return {'x': x, 'y': y}; | |
180 | }; | |
181 | ||
182 | // Get mouse event position in DOM element | |
125d8bbb | 183 | Util.getEventPosition = function (e, obj, scale) { |
15046f00 JM |
184 | var evt, docX, docY, pos; |
185 | //if (!e) evt = window.event; | |
186 | evt = (e ? e : window.event); | |
ad3f7624 | 187 | evt = (evt.changedTouches ? evt.changedTouches[0] : evt.touches ? evt.touches[0] : evt); |
15046f00 JM |
188 | if (evt.pageX || evt.pageY) { |
189 | docX = evt.pageX; | |
190 | docY = evt.pageY; | |
191 | } else if (evt.clientX || evt.clientY) { | |
192 | docX = evt.clientX + document.body.scrollLeft + | |
193 | document.documentElement.scrollLeft; | |
194 | docY = evt.clientY + document.body.scrollTop + | |
195 | document.documentElement.scrollTop; | |
196 | } | |
197 | pos = Util.getPosition(obj); | |
125d8bbb JM |
198 | if (typeof scale === "undefined") { |
199 | scale = 1; | |
200 | } | |
201 | return {'x': (docX - pos.x) / scale, 'y': (docY - pos.y) / scale}; | |
15046f00 JM |
202 | }; |
203 | ||
204 | ||
205 | // Event registration. Based on: http://www.scottandrew.com/weblog/articles/cbs-events | |
206 | Util.addEvent = function (obj, evType, fn){ | |
d93d3e09 | 207 | if (obj.attachEvent){ |
15046f00 JM |
208 | var r = obj.attachEvent("on"+evType, fn); |
209 | return r; | |
d93d3e09 JM |
210 | } else if (obj.addEventListener){ |
211 | obj.addEventListener(evType, fn, false); | |
212 | return true; | |
15046f00 JM |
213 | } else { |
214 | throw("Handler could not be attached"); | |
215 | } | |
216 | }; | |
217 | ||
218 | Util.removeEvent = function(obj, evType, fn){ | |
d93d3e09 | 219 | if (obj.detachEvent){ |
15046f00 JM |
220 | var r = obj.detachEvent("on"+evType, fn); |
221 | return r; | |
d93d3e09 JM |
222 | } else if (obj.removeEventListener){ |
223 | obj.removeEventListener(evType, fn, false); | |
224 | return true; | |
15046f00 JM |
225 | } else { |
226 | throw("Handler could not be removed"); | |
227 | } | |
228 | }; | |
229 | ||
230 | Util.stopEvent = function(e) { | |
231 | if (e.stopPropagation) { e.stopPropagation(); } | |
232 | else { e.cancelBubble = true; } | |
233 | ||
234 | if (e.preventDefault) { e.preventDefault(); } | |
235 | else { e.returnValue = false; } | |
236 | }; | |
237 | ||
238 | ||
239 | // Set browser engine versions. Based on mootools. | |
240 | Util.Features = {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)}; | |
241 | ||
242 | Util.Engine = { | |
aa670567 JM |
243 | // Version detection break in Opera 11.60 (errors on arguments.callee.caller reference) |
244 | //'presto': (function() { | |
c3a172b9 | 245 | // return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925)); }()), |
aa670567 JM |
246 | 'presto': (function() { return (!window.opera) ? false : true; }()), |
247 | ||
15046f00 JM |
248 | 'trident': (function() { |
249 | return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4); }()), | |
250 | 'webkit': (function() { | |
11bb7a4a JM |
251 | try { return (navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); } catch (e) { return false; } }()), |
252 | //'webkit': (function() { | |
253 | // return ((typeof navigator.taintEnabled !== "unknown") && navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); }()), | |
15046f00 | 254 | 'gecko': (function() { |
8787e49b | 255 | return (!document.getBoxObjectFor && window.mozInnerScreenX == null) ? false : ((document.getElementsByClassName) ? 19 : 18); }()) |
15046f00 | 256 | }; |
cdb55d26 JM |
257 | if (Util.Engine.webkit) { |
258 | // Extract actual webkit version if available | |
259 | Util.Engine.webkit = (function(v) { | |
260 | var re = new RegExp('WebKit/([0-9\.]*) '); | |
261 | v = (navigator.userAgent.match(re) || ['', v])[1]; | |
262 | return parseFloat(v, 10); | |
263 | })(Util.Engine.webkit); | |
264 | } | |
15046f00 JM |
265 | |
266 | Util.Flash = (function(){ | |
267 | var v, version; | |
268 | try { | |
269 | v = navigator.plugins['Shockwave Flash'].description; | |
270 | } catch(err1) { | |
271 | try { | |
272 | v = new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version'); | |
273 | } catch(err2) { | |
274 | v = '0 r0'; | |
275 | } | |
276 | } | |
277 | version = v.match(/\d+/g); | |
278 | return {version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0}; | |
a59f1cd2 | 279 | }()); |