+++ /dev/null
-/*
- * autoload.js
- *
- * Part of the jsMath package for mathematics on the web.
- *
- * This file is a plugin that checks if a page contains any math
- * that must be processed by jsMath, and only loads jsMath.js
- * when there is.
- *
- * You can control the items to look for via the variables
- *
- * jsMath.Autoload.findTeXstrings
- * jsMath.Autoload.findLaTeXstrings
- * jsMath.Autoload.findCustomStrings
- * jsMath.Autoload.findCustomSettings
- *
- * which control whether to look for TeX strings that will be converted
- * by jsMath.ConvertTeX(), or LaTeX strings that will be converted by
- * jsMath.ConvertLaTeX(). By default, the first is true and the second
- * and third are false. The findCustomStrings can be used to specify your
- * own delimiters for in-line and display mathematics, e.g.
- *
- * jsMath.Autoload.findCustomStrings = [
- * '[math],'[/math]', // start and end in-line math
- * '[display]','[/display]' // start and end display math
- * ];
- *
- * Finally, findCustomSettings can be set to an object reference whose
- * name:value pairs control the individual search settings for tex2math.
- * (See the plugins/tex2math.js file for more details).
- *
- * If any math strings are found, jsMath.js will be loaded automatically,
- * but not loaded otherwise. If any of the last four are set and TeX math
- * strings are found, then plugins/tex2ath.js will be loaded
- * automatically. jsMath.Autoload.needsJsMath will be set to true or
- * false depending on whether jsMath needed to be loaded.
- *
- * The value of jsMath.Autoload.checkElement controls the element to be
- * searched by the autoload plug-in. If unset, the complete document will
- * be searched. If set to a string, the element with that name will be
- * searched. If set to a DOM object, that object and its children will
- * be searched.
- *
- * Finally, there are two additional parameters that control files to
- * be loaded after jsMath.js, should it be needed. These are
- *
- * jsMath.Autoload.loadFonts
- * jsMath.Autoload.loadFiles
- *
- * If jsMath.js is loaded, the fonts contained in the loadFonts array
- * will be loaded, and the JavaScript files listed in the loadFiles array
- * will be run. Relative URL's are loaded based from the URL containing
- * jsMath.js.
- *
- * The autoload plugin can be loaded in the document HEAD or in the BODY.
- * If it is loaded in the HEAD, you will need to call jsMath.Autoload.Check()
- * at the end of the BODY (say in the window.onload handler) in order to
- * get it to check the page for math that needs to be tagged, otherwise load
- * the file at the bottom of the BODY and it will run the check automatically.
- *
- * You can call jsMath.Autoload.Run() after the check has been performed
- * in order to call the appropriate tex2math routines for the given Autoload
- * settings. You can call jsMath.Autoload.Run() even when jsMath isn't loaded.
- *
- * ---------------------------------------------------------------------
- *
- * Copyright 2004-2006 by Davide P. Cervone
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*************************************************************************/
-
-/*
- * Make sure jsMath.Autoload is available
- */
-if (!window.jsMath) {window.jsMath = {}}
-if (jsMath.Autoload == null) {jsMath.Autoload = {}}
-jsMath.Add = function (dst,src) {for (var id in src) {dst[id] = src[id]}};
-jsMath.document = document; // tex2math needs this
-
-jsMath.Add(jsMath.Autoload,{
-
- Script: {
-
- request: null, // XMLHttpRequest object (if we can get it)
- iframe: null, // the hidden iframe (if not)
- operaXMLHttpRequestBug: (window.opera != null), // is Opera browser
-
- /*
- * Get XMLHttpRequest object, if possible, and look up the URL root
- * (MSIE can't use xmlReuest to load local files, so avoid that)
- */
- Init: function () {
- this.Root();
- if (window.XMLHttpRequest) {
- try {this.request = new XMLHttpRequest} catch (err) {}
- // MSIE and FireFox3 can't use xmlRequest on local files,
- // but we don't have jsMath.browser yet to tell, so use this check
- if (this.request && window.location.protocol == "file:") {
- try {
- this.request.open("GET",jsMath.Autoload.root+"plugins/autoload.js",false);
- this.request.send(null);
- } catch (err) {
- this.request = null;
- // Firefox3 has window.postMessage for inter-window communication.
- // It can be used to handle the new file:// security model,
- // so set up the listener.
- if (window.postMessage && window.addEventListener) {
- this.mustPost = 1;
- window.addEventListener("message",jsMath.Autoload.Post.Listener,false);
- }
- }
- }
- }
- if (!this.request && window.ActiveXObject && !this.mustPost) {
- var xml = ["MSXML2.XMLHTTP.6.0","MSXML2.XMLHTTP.5.0","MSXML2.XMLHTTP.4.0",
- "MSXML2.XMLHTTP.3.0","MSXML2.XMLHTTP","Microsoft.XMLHTTP"];
- for (var i = 0; i < xml.length && !this.request; i++) {
- try {this.request = new ActiveXObject(xml[i])} catch (err) {}
- }
- }
- },
-
- /*
- * Load an external JavaScript file
- */
- Load: function (url) {
- if (this.request && !(this.operaXMLHttpRequestBug && url == 'jsMath.js')) {
- setTimeout(function () {jsMath.Autoload.Script.xmlLoad(url)},1);
- } else {
- this.startLoad(url);
- }
- },
-
- /*
- * Load an external JavaScript file via XMLHttpRequest
- */
- xmlLoad: function (url) {
- try {
- this.request.open("GET",jsMath.Autoload.root+url,false);
- this.request.send(null);
- } catch (err) {
- throw Error("autoload: can't load the file '"+url+"'\n"
- + "Message: "+err.message);
- }
- if (this.request.status && this.request.status >= 400) {
- throw Error("autoload: can't load the file '"+url+"'\n"
- + "Error status: "+this.request.status);
- }
- window.eval(this.request.responseText);
- this.endLoad();
- },
-
- /*
- * Load an external JavaScript file via jsMath-autoload.html
- */
- startLoad: function (url) {
- this.iframe = document.createElement('iframe');
- this.iframe.style.visibility = 'hidden';
- this.iframe.style.position = 'absolute';
- this.iframe.style.width = '0px';
- this.iframe.style.height = '0px';
- if (document.body.firstChild) {
- document.body.insertBefore(this.iframe,document.body.firstChild);
- } else {
- document.body.appendChild(this.iframe);
- }
- this.url = url; setTimeout('jsMath.Autoload.Script.setURL()',100);
- },
- endLoad: function () {setTimeout('jsMath.Autoload.Script.AfterLoad()',1)},
-
- /*
- * Use location.replace() to avoid browsers placing the file in
- * the history (and messing up the BACK button action). Not
- * completely effective in Firefox 1.0.x. Safari won't handle
- * replace() if the document is local (not sure if that's really
- * the issue, but that's the only time I see it).
- */
- setURL: function () {
- if (this.mustPost) {
- this.iframe.src = jsMath.Autoload.Post.startLoad(this.url,this.iframe);
- } else {
- var url = jsMath.Autoload.root+"jsMath-autoload.html";
- var doc = this.iframe.contentDocument;
- if (!doc && this.iframe.contentWindow) {doc = this.iframe.contentWindow.document}
- if (navigator.vendor == "Apple Computer, Inc." &&
- document.location.protocol == 'file:') {doc = null}
- if (doc) {doc.location.replace(url)} else {this.iframe.src = url}
- }
- },
-
- /*
- * Queue items that need to be postponed until jsMath has run
- */
- queue: [],
- Push: function (name,data) {this.queue[this.queue.length] = [name,data]},
- RunStack: function () {
- if (this.tex2math) {jsMath.Autoload.Check2(); return}
- for (var i = 0; i < this.queue.length; i++) {
- var name = this.queue[i][0];
- var data = this.queue[i][1];
- if (data.length == 1) {jsMath[name](data[0])}
- else {jsMath[name](data[0],data[1],data[2],data[3])}
- }
- this.queue = [];
- },
-
- AfterLoad: function () {jsMath.Autoload.Script.RunStack()},
-
- /*
- * Look up the jsMath root directory, if it is not already supplied
- */
- Root: function () {
- if (jsMath.Autoload.root) return;
- var script = document.getElementsByTagName('script');
- if (script) {
- for (var i = 0; i < script.length; i++) {
- var src = script[i].src;
- if (src && src.match('(^|/|\\\\)plugins/autoload.js$')) {
- jsMath.Autoload.root = src.replace(/plugins\/autoload.js$/,'');
- break;
- }
- }
- }
- }
-
- },
-
- /*
- * Handle window.postMessage() events in Firefox3
- */
- Post: {
- window: null, // iframe we are ing to
-
- Listener: function (event) {
- if (event.source != jsMath.Autoload.Post.window) return;
- var domain = event.origin.replace(/^file:\/\//,'');
- var ddomain = document.domain.replace(/^file:\/\//,'');
- if (domain == null || domain == "" || domain == "null") {domain = "localhost"}
- if (ddomain == null || ddomain == "" || ddomain == "null") {ddomain = "localhost"}
- if (domain != ddomain || event.data.substr(0,6) != "jsMAL:") return;
- var type = event.data.substr(6,3).replace(/ /g,'');
- var message = event.data.substr(10);
- if (jsMath.Autoload.Post.Commands[type]) (jsMath.Autoload.Post.Commands[type])(message);
- // cancel event?
- },
-
- /*
- * Commands that can be performed by the listener
- */
- Commands: {
- SCR: function (message) {window.eval(message)},
- ERR: function (message) {jsMath.Autoload.Script.endLoad()},
- END: function (message) {jsMath.Autoload.Script.endLoad()}
- },
-
- startLoad: function (url,iframe) {
- this.window = iframe.contentWindow;
- return jsMath.Autoload.root+"jsMath-loader-post.html?autoload="+url;
- },
-
- endLoad: function () {
- this.window = null;
- }
- },
-
-
- /**************************************************************/
-
- /*
- * Load tex2math first (so we can call its search functions
- * to look to see if anything needs to be turned into math)
- * if it is needed, otherwise go on to the second check.
- */
- Check: function () {
- if (this.checked) return; this.checked = 1;
- if ((this.findTeXstrings || this.findLaTeXstrings ||
- this.findCustomStrings || this.findCustomSettings) &&
- (!jsMath.tex2math || !jsMath.tex2math.loaded)) {
- this.Script.tex2math = 1;
- this.Script.Load('plugins/tex2math.js');
- } else {
- if (!jsMath.tex2math) {jsMath.tex2math = {}}
- this.Check2();
- }
- },
- ReCheck: function () {
- if (jsMath.loaded) return;
- this.InitStubs();
- this.checked = 0;
- this.Script.queue = [];
- this.Check();
- },
-
- /*
- * Once tex2math is loaded, use it to check for math that
- * needs to be tagged for jsMath, and load jsMath if it is needed
- */
- Check2: function () {
- this.Script.tex2math = 0; this.needsJsMath = 0;
- if (this.checkElement == null) {this.checkElement = null}
-
- if (this.findTeXstrings) {jsMath.tex2math.ConvertTeX(this.checkElement)}
- if (this.findLaTeXstrings) {jsMath.tex2math.ConvertLaTeX(this.checkElement)}
- if (this.findCustomSettings) {jsMath.tex2math.Convert(this.checkElement,this.findCustomSettings)}
- if (this.findCustomStrings) {
- var s = this.findCustomStrings;
- jsMath.tex2math.CustomSearch(s[0],s[1],s[2],s[3]);
- jsMath.tex2math.ConvertCustom(this.checkElement);
- }
-
- this.needsJsMath = this.areMathElements(this.checkElement);
- if (this.needsJsMath) {
- this.LoadJsMath();
- } else {
- jsMath.Process = function () {};
- jsMath.ProcessBeforeShowing = function () {};
- jsMath.ProcessElement = function () {};
- jsMath.ConvertTeX = function () {};
- jsMath.ConvertTeX2 = function () {};
- jsMath.ConvertLaTeX = function () {};
- jsMath.ConvertCustom = function () {};
- jsMath.CustomSearch = function () {};
- jsMath.Macro = function () {};
- jsMath.Synchronize = function (code,data) {
- if (typeof(code) == 'string') {eval(code)} else {code(data)}
- };
- jsMath.Autoload.Script.RunStack(); // perform pending commands
- jsMath.Autoload.setMessage();
- }
- },
-
- /*
- * A callback used in the tex2math searches to signal that
- * some math has been found.
- */
- tex2mathCallback: function () {
- jsMath.Autoload.needsJsMath = 1;
- return false;
- },
-
- /*
- * jsMath.Autoload.Run() is now longer needed
- */
- Run: function (data) {},
-
- /*
- * Look to see if there are SPAN or DIV elements of class "math".
- */
- areMathElements: function (obj) {
- if (!obj) {obj = document}
- if (typeof(obj) == 'string') {obj = document.getElementById(obj)}
- if (!obj.getElementsByTagName) {return false}
- var math = obj.getElementsByTagName('div');
- for (var k = 0; k < math.length; k++)
- {if (math[k].className.match(/(^| )math( |$)/)) {return true}}
- math = obj.getElementsByTagName('span');
- for (var k = 0; k < math.length; k++)
- {if (math[k].className.match(/(^| )math( |$)/)) {return true}}
- return false;
- },
-
- /*
- * When math tags are found, load the jsMath.js file,
- * and afterward, load any auxiliary files or fonts,
- * and then do any pending commands.
- */
- LoadJsMath: function () {
- if (this.loading) return;
- if (jsMath.loaded) {this.afterLoad(); return}
- if (this.root) {
- this.loading = 1;
- this.setMessage('Loading jsMath...');
- this.Script.AfterLoad = this.afterLoad;
- this.Script.Load('jsMath.js');
- } else {
- alert("Can't determine URL for jsMath.js");
- }
- },
- afterLoad: function () {
- jsMath.Autoload.loading = 0;
- //
- // Handle MSIE bug where jsMath.window both is and is not the actual window
- //
- if (jsMath.tex2math.window) {jsMath.tex2math.window.jsMath = jsMath}
- if (jsMath.browser == 'MSIE') {window.onscroll = jsMath.window.onscroll};
- var fonts = jsMath.Autoload.loadFonts;
- if (fonts) {
- if (typeof(fonts) != 'object') {fonts = [fonts]}
- for (var i = 0; i < fonts.length; i++) {jsMath.Font.Load(fonts[i])}
- }
- var files = jsMath.Autoload.loadFiles;
- if (files) {
- if (typeof(files) != 'object') {files = [files]}
- for (var i = 0; i < files.length; i++) {jsMath.Setup.Script(files[i])}
- }
- var macros = jsMath.Autoload.macros;
- if (macros) {
- for (var id in macros) {
- if (typeof(macros[id]) == 'string') {
- jsMath.Macro(id,macros[id]);
- } else {
- jsMath.Macro(id,macros[id][0],macros[id][1]);
- }
- }
- }
- jsMath.Synchronize(function () {jsMath.Autoload.Script.RunStack()});
- jsMath.Autoload.setMessage();
- },
-
- /*
- * Display a message in a small box at the bottom of the screen
- */
- setMessage: function (message) {
- if (message) {
- this.div = document.createElement('div');
- if (!document.body.hasChildNodes) {document.body.appendChild(this.div)}
- else {document.body.insertBefore(this.div,document.body.firstChild)}
- var style = {
- position:'fixed', bottom:'1px', left:'2px',
- backgroundColor:'#E6E6E6', border:'solid 1px #959595',
- margin:'0px', padding:'1px 8px', zIndex:102,
- color:'black', fontSize:'75%', width:'auto'
- };
- for (var id in style) {this.div.style[id] = style[id]}
- this.div.id = "jsMath_message";
- this.div.appendChild(jsMath.document.createTextNode(message));
- } else if (this.div) {
- this.div.firstChild.nodeValue = "";
- this.div.style.visibility = 'hidden';
- }
- },
-
- /*
- * Queue these so we can do them after jsMath has been loaded
- */
- stubs: {
- Process: function (data) {jsMath.Autoload.Script.Push('Process',[data])},
- ProcessBeforeShowing: function (data) {jsMath.Autoload.Script.Push('ProcessBeforeShowing',[data])},
- ProcessElement: function (data) {jsMath.Autoload.Script.Push('ProcessElement',[data])},
- ConvertTeX: function (data) {jsMath.Autoload.Script.Push('ConvertTeX',[data])},
- ConvertTeX2: function (data) {jsMath.Autoload.Script.Push('ConvertTeX2',[data])},
- ConvertLaTeX: function (data) {jsMath.Autoload.Script.Push('ConvertLaTeX',[data])},
- ConvertCustom: function (data) {jsMath.Autoload.Script.Push('ConvertCustom',[data])},
- CustomSearch: function (d1,d2,d3,d4) {jsMath.Autoload.Script.Push('CustomSearch',[d1,d2,d3,d4])},
- Synchronize: function (data) {jsMath.Autoload.Script.Push('Synchronize',[data])},
- Macro: function (cs,def,params) {jsMath.Autoload.Script.Push('Macro',[cs,def,params])}
- },
-
- InitStubs: function () {jsMath.Add(jsMath,jsMath.Autoload.stubs)}
-
-});
-
-/*
- * Initialize
- */
-
-if (jsMath.Autoload.findTeXstrings == null) {jsMath.Autoload.findTeXstrings = 0}
-if (jsMath.Autoload.findLaTeXstrings == null) {jsMath.Autoload.findLaTeXstrings = 0}
-
-jsMath.Autoload.Script.Init();
-jsMath.Autoload.InitStubs();
-if (document.body && !jsMath.Autoload.delayCheck) {jsMath.Autoload.Check()}