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comparison geotemco/lib/simile/ajax/simile-ajax-api.js @ 0:b12c99b7c3f0

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commit for previous development
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Mon, 19 Jan 2015 17:13:49 +0100
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-1:000000000000 0:b12c99b7c3f0
1 /*==================================================
2 * Simile Ajax API
3 *==================================================
4 */
5
6 if (typeof SimileAjax == "undefined") {
7 var isCompiled = ("SimileAjax_isCompiled" in window) && window.SimileAjax_isCompiled;
8
9 var SimileAjax = {
10 loaded: false,
11 loadingScriptsCount: 0,
12 error: null,
13 params: { bundle:"true" }
14 };
15
16 SimileAjax.Platform = new Object();
17 /*
18 HACK: We need these 2 things here because we cannot simply append
19 a <script> element containing code that accesses SimileAjax.Platform
20 to initialize it because IE executes that <script> code first
21 before it loads ajax.js and platform.js.
22 */
23
24 var getHead = function(doc) {
25 return doc.getElementsByTagName("head")[0];
26 };
27
28 SimileAjax.findScript = function(doc, substring) {
29 var scripts=doc.documentElement.getElementsByTagName("script");
30 for (s=0; s<scripts.length;s++) {
31 var url = scripts[s].src;
32 var i = url.indexOf(substring);
33 if (i >= 0) {
34 return url;
35 }
36 }
37
38 var heads = doc.documentElement.getElementsByTagName("head");
39 for (var h = 0; h < heads.length; h++) {
40 var node = heads[h].firstChild;
41 while (node != null) {
42 if (node.nodeType == 1 && node.tagName.toLowerCase() == "script") {
43 var url = node.src;
44 var i = url.indexOf(substring);
45 if (i >= 0) {
46 return url;
47 }
48 }
49 node = node.nextSibling;
50 }
51 }
52 return null;
53 };
54
55 SimileAjax.includeJavascriptFile = function(doc, url, onerror, charset, callback) {
56 onerror = onerror || "";
57 if (doc.body == null) {
58 try {
59 var q = "'" + onerror.replace( /'/g, '&apos' ) + "'"; // "
60 doc.write("<script src='" + url + "' onerror="+ q +
61 (charset ? " charset='"+ charset +"'" : "") +
62 " type='text/javascript'>"+ onerror + "</script>");
63 return;
64 } catch (e) {
65 // fall through
66 }
67 }
68
69 var calledBack = false;
70 var callbackOnce = function() {
71 if (callback && !calledBack) {
72 calledBack=true;
73 callback();
74 }
75 }
76 var script = doc.createElement("script");
77 if (onerror) {
78 try { script.innerHTML = onerror; } catch(e) {};
79 script.onerror = function () {onerror(); callbackOnce()};
80 }
81 else {
82 script.onerror = callbackOnce;
83 }
84 if (charset) {
85 script.setAttribute("charset", charset);
86 }
87 script.type = "text/javascript";
88 script.language = "JavaScript";
89 script.src = url;
90 if (callback)
91 script.onload = script.onreadystatechange = function() {
92 if (!this.readyState || this.readyState == "loaded" ||
93 this.readyState == "complete")
94 callbackOnce();
95 }
96 return getHead(doc).appendChild(script);
97 };
98
99 function includeJavascriptList(doc, urlPrefix, filenames, included, index, callback) {
100 if (!included[index]) { // avoid duplicate callback
101 included[index] = true;
102 if (index<filenames.length) {
103 var nextCall=function(){
104 includeJavascriptList(doc, urlPrefix, filenames,
105 included, index+1, callback);
106 }
107 SimileAjax.
108 includeJavascriptFile(doc,
109 urlPrefix + filenames[index], null, null,
110 nextCall);
111 }
112 else if (callback != null) callback();
113 }
114 }
115
116 SimileAjax.includeJavascriptFiles = function(doc, urlPrefix, filenames) {
117 if (doc.body == null) {
118 for (var i = 0; i < filenames.length; i++) {
119 SimileAjax.includeJavascriptFile(doc, urlPrefix + filenames[i]);
120 }
121 SimileAjax.loadingScriptsCount += filenames.length;
122 SimileAjax.includeJavascriptFile(doc, SimileAjax.urlPrefix + "scripts/signal.js?" + filenames.length);
123 }
124 else {
125 var included = new Array();
126 for (var i = 0; i < filenames.length; i++)
127 included[i] = false;
128
129 if (typeof window.SimileAjax_onLoad == "string")
130 f = eval(window.SimileAjax_onLoad);
131 else if (typeof window.SimileAjax_onLoad == "function")
132 f = window.SimileAjax_onLoad;
133
134 window.SimileAjax_onLoad = null;
135 includeJavascriptList(doc, urlPrefix, filenames, included, 0, f);
136 }
137 };
138
139 SimileAjax.includeCssFile = function(doc, url) {
140 if (doc.body == null) {
141 try {
142 doc.write("<link rel='stylesheet' href='" + url + "' type='text/css'/>");
143 return;
144 } catch (e) {
145 // fall through
146 }
147 }
148
149 var link = doc.createElement("link");
150 link.setAttribute("rel", "stylesheet");
151 link.setAttribute("type", "text/css");
152 link.setAttribute("href", url);
153 getHead(doc).appendChild(link);
154 };
155 SimileAjax.includeCssFiles = function(doc, urlPrefix, filenames) {
156 for (var i = 0; i < filenames.length; i++) {
157 SimileAjax.includeCssFile(doc, urlPrefix + filenames[i]);
158 }
159 };
160
161 /**
162 * Append into urls each string in suffixes after prefixing it with urlPrefix.
163 * @param {Array} urls
164 * @param {String} urlPrefix
165 * @param {Array} suffixes
166 */
167 SimileAjax.prefixURLs = function(urls, urlPrefix, suffixes) {
168 for (var i = 0; i < suffixes.length; i++) {
169 urls.push(urlPrefix + suffixes[i]);
170 }
171 };
172
173 /**
174 * Parse out the query parameters from a URL
175 * @param {String} url the url to parse, or location.href if undefined
176 * @param {Object} to optional object to extend with the parameters
177 * @param {Object} types optional object mapping keys to value types
178 * (String, Number, Boolean or Array, String by default)
179 * @return a key/value Object whose keys are the query parameter names
180 * @type Object
181 */
182 SimileAjax.parseURLParameters = function(url, to, types) {
183 to = to || {};
184 types = types || {};
185
186 if (typeof url == "undefined") {
187 url = location.href;
188 }
189 var q = url.indexOf("?");
190 if (q < 0) {
191 return to;
192 }
193 url = (url+"#").slice(q+1, url.indexOf("#")); // toss the URL fragment
194
195 var params = url.split("&"), param, parsed = {};
196 var decode = window.decodeURIComponent || unescape;
197 for (var i = 0; param = params[i]; i++) {
198 var eq = param.indexOf("=");
199 var name = decode(param.slice(0,eq));
200 var old = parsed[name];
201 var replacement = decode(param.slice(eq+1));
202
203 if (typeof old == "undefined") {
204 old = [];
205 } else if (!(old instanceof Array)) {
206 old = [old];
207 }
208 parsed[name] = old.concat(replacement);
209 }
210 for (var i in parsed) {
211 if (!parsed.hasOwnProperty(i)) continue;
212 var type = types[i] || String;
213 var data = parsed[i];
214 if (!(data instanceof Array)) {
215 data = [data];
216 }
217 if (type === Boolean && data[0] == "false") {
218 to[i] = false; // because Boolean("false") === true
219 } else {
220 to[i] = type.apply(this, data);
221 }
222 }
223 return to;
224 };
225
226 if (!isCompiled) {
227 (function() {
228 var javascriptFiles = [
229 "platform.js",
230 "debug.js",
231 "xmlhttp.js",
232 "json.js",
233 "dom.js",
234 "graphics.js",
235 "date-time.js",
236 "string.js",
237 "html.js",
238 "data-structure.js",
239 "units.js",
240
241 "ajax.js",
242 "history.js",
243 "window-manager.js",
244 "remoteLog.js"
245 ];
246 var cssFiles = [
247 "graphics.css"
248 ];
249 if (!("jQuery" in window) && !("$" in window)) {
250 // javascriptFiles.unshift("jquery-1.4.2.min.js");
251 SimileAjax.includeJavascriptFile(document, "http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js");
252 }
253
254
255 if (typeof SimileAjax_urlPrefix == "string") {
256 SimileAjax.urlPrefix = SimileAjax_urlPrefix;
257 } else {
258 var url = SimileAjax.findScript(document, "simile-ajax-api.js");
259 if (url == null) {
260 SimileAjax.error = new Error("Failed to derive URL prefix for Simile Ajax API code files");
261 return;
262 }
263
264 SimileAjax.urlPrefix = url.substr(0, url.indexOf("simile-ajax-api.js"));
265 SimileAjax.parseURLParameters(url, SimileAjax.params, { bundle: Boolean });
266 }
267
268
269
270 if (!isCompiled) {
271 if (SimileAjax.params.bundle) {
272 SimileAjax.includeJavascriptFiles(document, SimileAjax.urlPrefix, [ "simile-ajax-bundle.js" ]);
273 } else {
274 SimileAjax.includeJavascriptFiles(document, SimileAjax.urlPrefix + "scripts/", javascriptFiles);
275 }
276 SimileAjax.includeCssFiles(document, SimileAjax.urlPrefix + "styles/", cssFiles);
277 }
278
279 SimileAjax.loaded = true;
280 })();
281 }
282 }