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61dd52c9 | 1 | /* |
15046f00 JM |
2 | * noVNC: HTML5 VNC client |
3 | * Copyright (C) 2010 Joel Martin | |
4 | * Licensed under LGPL-3 (see LICENSE.LGPL-3) | |
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 */ | |
11 | /*global window, document, navigator, ActiveXObject*/ | |
61dd52c9 | 12 | |
15046f00 JM |
13 | // Globals defined here |
14 | var Util = {}, $; | |
15 | ||
81e5adaf | 16 | |
da6dd893 JM |
17 | /* |
18 | * Logging/debug routines | |
19 | */ | |
20 | ||
21 | Util.init_logging = function (level) { | |
22 | if (typeof window.console === "undefined") { | |
23 | if (typeof window.opera !== "undefined") { | |
24 | window.console = { | |
25 | 'log' : window.opera.postError, | |
26 | 'warn' : window.opera.postError, | |
27 | 'error': window.opera.postError }; | |
28 | } else { | |
29 | window.console = { | |
30 | 'log' : function(m) {}, | |
31 | 'warn' : function(m) {}, | |
32 | 'error': function(m) {}}; | |
33 | } | |
3b7575b2 | 34 | } |
61dd52c9 | 35 | |
da6dd893 JM |
36 | Util.Debug = Util.Info = Util.Warn = Util.Error = function (msg) {}; |
37 | switch (level) { | |
38 | case 'debug': Util.Debug = function (msg) { console.log(msg); }; | |
39 | case 'info': Util.Info = function (msg) { console.log(msg); }; | |
40 | case 'warn': Util.Warn = function (msg) { console.warn(msg); }; | |
41 | case 'error': Util.Error = function (msg) { console.error(msg); }; | |
42 | break; | |
43 | default: | |
44 | throw("invalid logging type '" + level + "'"); | |
45 | } | |
81e5adaf | 46 | } |
da6dd893 JM |
47 | // Initialize logging level |
48 | Util.init_logging( (document.location.href.match( | |
49 | /logging=([A-Za-z0-9\._\-]*)/) || | |
50 | ['', 'warn'])[1] ); | |
81e5adaf | 51 | |
da6dd893 JM |
52 | /* |
53 | * Simple DOM selector by ID | |
54 | */ | |
15046f00 JM |
55 | if (!window.$) { |
56 | $ = function (id) { | |
57 | if (document.getElementById) { | |
58 | return document.getElementById(id); | |
59 | } else if (document.all) { | |
60 | return document.all[id]; | |
61 | } else if (document.layers) { | |
62 | return document.layers[id]; | |
63 | } | |
64 | return undefined; | |
65 | }; | |
66 | } | |
56ec48be JM |
67 | |
68 | /* | |
69 | * Make arrays quack | |
70 | */ | |
71 | ||
72 | Array.prototype.shift8 = function () { | |
73 | return this.shift(); | |
74 | }; | |
75 | Array.prototype.push8 = function (num) { | |
76 | this.push(num & 0xFF); | |
77 | }; | |
78 | ||
79 | Array.prototype.shift16 = function () { | |
80 | return (this.shift() << 8) + | |
81 | (this.shift() ); | |
82 | }; | |
83 | Array.prototype.push16 = function (num) { | |
84 | this.push((num >> 8) & 0xFF, | |
85 | (num ) & 0xFF ); | |
86 | }; | |
2c2b492c JM |
87 | Array.prototype.push16le = function (num) { |
88 | this.push((num ) & 0xFF, | |
89 | (num >> 8) & 0xFF ); | |
90 | }; | |
56ec48be JM |
91 | |
92 | ||
93 | Array.prototype.shift32 = function () { | |
94 | return (this.shift() << 24) + | |
95 | (this.shift() << 16) + | |
96 | (this.shift() << 8) + | |
97 | (this.shift() ); | |
98 | }; | |
99 | Array.prototype.get32 = function (off) { | |
100 | return (this[off ] << 24) + | |
101 | (this[off + 1] << 16) + | |
102 | (this[off + 2] << 8) + | |
103 | (this[off + 3] ); | |
104 | }; | |
105 | Array.prototype.push32 = function (num) { | |
106 | this.push((num >> 24) & 0xFF, | |
107 | (num >> 16) & 0xFF, | |
108 | (num >> 8) & 0xFF, | |
109 | (num ) & 0xFF ); | |
110 | }; | |
2c2b492c JM |
111 | Array.prototype.push32le = function (num) { |
112 | this.push((num ) & 0xFF, | |
113 | (num >> 8) & 0xFF, | |
114 | (num >> 16) & 0xFF, | |
115 | (num >> 24) & 0xFF ); | |
116 | }; | |
117 | ||
56ec48be JM |
118 | |
119 | Array.prototype.shiftStr = function (len) { | |
120 | var arr = this.splice(0, len); | |
121 | return arr.map(function (num) { | |
122 | return String.fromCharCode(num); } ).join(''); | |
123 | }; | |
124 | Array.prototype.pushStr = function (str) { | |
125 | var i, n = str.length; | |
15046f00 | 126 | for (i=0; i < n; i+=1) { |
56ec48be JM |
127 | this.push(str.charCodeAt(i)); |
128 | } | |
129 | }; | |
130 | ||
131 | Array.prototype.shiftBytes = function (len) { | |
132 | return this.splice(0, len); | |
133 | }; | |
134 | ||
15046f00 JM |
135 | /* |
136 | * ------------------------------------------------------ | |
137 | * Namespaced in Util | |
138 | * ------------------------------------------------------ | |
139 | */ | |
140 | ||
141 | Util.dirObj = function (obj, depth, parent) { | |
142 | var i, msg = "", val = ""; | |
143 | if (! depth) { depth=2; } | |
144 | if (! parent) { parent= ""; } | |
145 | ||
146 | // Print the properties of the passed-in object | |
147 | for (i in obj) { | |
148 | if ((depth > 1) && (typeof obj[i] === "object")) { | |
149 | // Recurse attributes that are objects | |
150 | msg += Util.dirObj(obj[i], depth-1, parent + "." + i); | |
151 | } else { | |
152 | //val = new String(obj[i]).replace("\n", " "); | |
153 | val = obj[i].toString().replace("\n", " "); | |
154 | if (val.length > 30) { | |
155 | val = val.substr(0,30) + "..."; | |
156 | } | |
157 | msg += parent + "." + i + ": " + val + "\n"; | |
158 | } | |
159 | } | |
160 | return msg; | |
161 | }; | |
162 | ||
163 | /* | |
164 | * Cross-browser routines | |
165 | */ | |
166 | ||
167 | // Get DOM element position on page | |
168 | Util.getPosition = function (obj) { | |
169 | var x = 0, y = 0; | |
170 | if (obj.offsetParent) { | |
171 | do { | |
172 | x += obj.offsetLeft; | |
173 | y += obj.offsetTop; | |
174 | obj = obj.offsetParent; | |
175 | } while (obj); | |
176 | } | |
177 | return {'x': x, 'y': y}; | |
178 | }; | |
179 | ||
180 | // Get mouse event position in DOM element | |
181 | Util.getEventPosition = function (e, obj) { | |
182 | var evt, docX, docY, pos; | |
183 | //if (!e) evt = window.event; | |
184 | evt = (e ? e : window.event); | |
185 | if (evt.pageX || evt.pageY) { | |
186 | docX = evt.pageX; | |
187 | docY = evt.pageY; | |
188 | } else if (evt.clientX || evt.clientY) { | |
189 | docX = evt.clientX + document.body.scrollLeft + | |
190 | document.documentElement.scrollLeft; | |
191 | docY = evt.clientY + document.body.scrollTop + | |
192 | document.documentElement.scrollTop; | |
193 | } | |
194 | pos = Util.getPosition(obj); | |
195 | return {'x': docX - pos.x, 'y': docY - pos.y}; | |
196 | }; | |
197 | ||
198 | ||
199 | // Event registration. Based on: http://www.scottandrew.com/weblog/articles/cbs-events | |
200 | Util.addEvent = function (obj, evType, fn){ | |
d93d3e09 | 201 | if (obj.attachEvent){ |
15046f00 JM |
202 | var r = obj.attachEvent("on"+evType, fn); |
203 | return r; | |
d93d3e09 JM |
204 | } else if (obj.addEventListener){ |
205 | obj.addEventListener(evType, fn, false); | |
206 | return true; | |
15046f00 JM |
207 | } else { |
208 | throw("Handler could not be attached"); | |
209 | } | |
210 | }; | |
211 | ||
212 | Util.removeEvent = function(obj, evType, fn){ | |
d93d3e09 | 213 | if (obj.detachEvent){ |
15046f00 JM |
214 | var r = obj.detachEvent("on"+evType, fn); |
215 | return r; | |
d93d3e09 JM |
216 | } else if (obj.removeEventListener){ |
217 | obj.removeEventListener(evType, fn, false); | |
218 | return true; | |
15046f00 JM |
219 | } else { |
220 | throw("Handler could not be removed"); | |
221 | } | |
222 | }; | |
223 | ||
224 | Util.stopEvent = function(e) { | |
225 | if (e.stopPropagation) { e.stopPropagation(); } | |
226 | else { e.cancelBubble = true; } | |
227 | ||
228 | if (e.preventDefault) { e.preventDefault(); } | |
229 | else { e.returnValue = false; } | |
230 | }; | |
231 | ||
232 | ||
233 | // Set browser engine versions. Based on mootools. | |
234 | Util.Features = {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)}; | |
235 | ||
236 | Util.Engine = { | |
237 | 'presto': (function() { | |
238 | return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925)); }()), | |
239 | 'trident': (function() { | |
240 | return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4); }()), | |
241 | 'webkit': (function() { | |
11bb7a4a JM |
242 | try { return (navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); } catch (e) { return false; } }()), |
243 | //'webkit': (function() { | |
244 | // return ((typeof navigator.taintEnabled !== "unknown") && navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); }()), | |
15046f00 JM |
245 | 'gecko': (function() { |
246 | return (!document.getBoxObjectFor && !window.mozInnerScreenX) ? false : ((document.getElementsByClassName) ? 19 : 18); }()) | |
247 | }; | |
248 | ||
249 | Util.Flash = (function(){ | |
250 | var v, version; | |
251 | try { | |
252 | v = navigator.plugins['Shockwave Flash'].description; | |
253 | } catch(err1) { | |
254 | try { | |
255 | v = new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version'); | |
256 | } catch(err2) { | |
257 | v = '0 r0'; | |
258 | } | |
259 | } | |
260 | version = v.match(/\d+/g); | |
261 | return {version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0}; | |
262 | }()); | |
263 | ||
da6dd893 JM |
264 | /* |
265 | * Cookie handling. Dervied from: http://www.quirksmode.org/js/cookies.html | |
266 | */ | |
267 | // No days means only for this browser session | |
268 | Util.createCookie = function(name,value,days) { | |
269 | if (days) { | |
270 | var date = new Date(); | |
271 | date.setTime(date.getTime()+(days*24*60*60*1000)); | |
272 | var expires = "; expires="+date.toGMTString(); | |
273 | } | |
274 | else var expires = ""; | |
275 | document.cookie = name+"="+value+expires+"; path=/"; | |
276 | }; | |
277 | ||
278 | Util.readCookie = function(name, defaultValue) { | |
279 | var nameEQ = name + "="; | |
280 | var ca = document.cookie.split(';'); | |
281 | for(var i=0;i < ca.length;i++) { | |
282 | var c = ca[i]; | |
283 | while (c.charAt(0)==' ') c = c.substring(1,c.length); | |
284 | if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length); | |
285 | } | |
286 | return (typeof defaultValue !== 'undefined') ? defaultValue : null; | |
287 | }; | |
288 | ||
289 | Util.eraseCookie = function(name) { | |
290 | createCookie(name,"",-1); | |
291 | }; | |
292 | ||
293 | /* | |
294 | * Alternate stylesheet selection | |
295 | */ | |
296 | Util.getStylesheets = function() { var i, links, sheets = []; | |
297 | links = document.getElementsByTagName("link") | |
298 | for (i = 0; i < links.length; i++) { | |
299 | if (links[i].title && | |
300 | links[i].rel.toUpperCase().indexOf("STYLESHEET") > -1) { | |
301 | sheets.push(links[i]); | |
302 | } | |
303 | } | |
304 | return sheets; | |
305 | }; | |
306 | ||
307 | // No sheet means try and use value from cookie, null sheet used to | |
308 | // clear all alternates. | |
309 | Util.selectStylesheet = function(sheet) { | |
310 | var i, link, sheets = Util.getStylesheets(); | |
311 | if (typeof sheet === 'undefined') { | |
312 | sheet = 'default'; | |
313 | } | |
314 | for (i=0; i < sheets.length; i++) { | |
315 | link = sheets[i]; | |
316 | if (link.title === sheet) { | |
317 | Util.Debug("Using stylesheet " + sheet); | |
318 | link.disabled = false; | |
319 | } else { | |
320 | Util.Debug("Skipping stylesheet " + link.title); | |
321 | link.disabled = true; | |
322 | } | |
323 | } | |
324 | return sheet; | |
325 | }; | |
326 | ||
327 | // call once to disable alternates and get around webkit bug | |
328 | Util.selectStylesheet(null); | |
329 |