/* * jsTeX * * Renders (some of) TeX inline formatting rules and entities into HTML * directly upon loading the document in the browser. * * Inspired and meant to be a companion to the outstanding jsMath package that * does the same for TeX's math mode. * * Author: Stefano Mazzocchi * Copyright: Massachusetts Institute of Technology * License: BSD * Encoding: UTF-8 */ (function() { if (typeof window.jsTeX == "undefined") { var log = function(msg) { if (jsTeX.log && console && console.log) { console.log(msg); } } var chars = { "\"": { "A" : "Ä", "E" : "Ë", "H" : "Ḧ", "I" : "Ï", "O" : "Ö", "U" : "Ü", "W" : "Ẅ", "X" : "Ẍ", "Y" : "Ÿ", "a" : "ä", "e" : "ë", "h" : "ḧ", "i" : "ï", "o" : "ö", "t" : "ẗ", "u" : "ü", "w" : "ẅ", "x" : "ẍ", "y" : "ÿ" }, "'" : { "A" : "Á", "C" : "Ć", "E" : "É", "G" : "Ǵ", "I" : "Í", "K" : "Ḱ", "L" : "Ĺ", "M" : "Ḿ", "N" : "Ń", "O" : "Ó", "P" : "Ṕ", "R" : "Ŕ", "S" : "Ś", "U" : "Ú", "W" : "Ẃ", "Y" : "Ý", "Z" : "Ź", "a" : "á", "c" : "ć", "e" : "é", "g" : "ǵ", "i" : "í", "k" : "ḱ", "l" : "ĺ", "m" : "ḿ", "n" : "ń", "o" : "ó", "p" : "ṕ", "r" : "ŕ", "s" : "ś", "u" : "ú", "w" : "ẃ", "y" : "ý", "z" : "ź" }, "." : { "A" : "Ȧ", "B" : "Ḃ", "C" : "Ċ", "D" : "Ḋ", "E" : "Ė", "F" : "Ḟ", "G" : "Ġ", "H" : "Ḣ", "I" : "İ", "M" : "Ṁ", "N" : "Ṅ", "O" : "Ȯ", "P" : "Ṗ", "R" : "Ṙ", "S" : "Ṡ", "T" : "Ṫ", "W" : "Ẇ", "X" : "Ẋ", "Y" : "Ẏ", "Z" : "Ż", "a" : "ȧ", "b" : "ḃ", "c" : "ċ", "d" : "ḋ", "e" : "ė", "f" : "ḟ", "g" : "ġ", "h" : "ḣ", "m" : "ṁ", "n" : "ṅ", "o" : "ȯ", "p" : "ṗ", "r" : "ṙ", "s" : "ṡ", "t" : "ṫ", "w" : "ẇ", "x" : "ẋ", "y" : "ẏ", "z" : "ż" }, "=" : { "A" : "Ā", "E" : "Ē", "G" : "Ḡ", "I" : "Ī", "O" : "Ō", "U" : "Ū", "Y" : "Ȳ", "a" : "ā", "e" : "ē", "g" : "ḡ", "i" : "ī", "o" : "ō", "u" : "ū", "y" : "ȳ" }, "^": { "A" : "Â", "C" : "Ĉ", "E" : "Ê", "G" : "Ĝ", "H" : "Ĥ", "I" : "Î", "J" : "Ĵ", "O" : "Ô", "S" : "Ŝ", "U" : "Û", "W" : "Ŵ", "Y" : "Ŷ", "Z" : "Ẑ", "a" : "â", "c" : "ĉ", "e" : "ê", "g" : "ĝ", "h" : "ĥ", "i" : "î", "j" : "ĵ", "o" : "ô", "s" : "ŝ", "u" : "û", "w" : "ŵ", "y" : "ŷ", "z" : "ẑ" }, "`" : { "A" : "À", "E" : "È", "I" : "Ì", "N" : "Ǹ", "O" : "Ò", "U" : "Ù", "W" : "Ẁ", "Y" : "Ỳ", "a" : "à", "e" : "è", "i" : "ì", "n" : "ǹ", "o" : "ò", "u" : "ù", "w" : "ẁ", "y" : "ỳ" }, "~": { "A" : "Ã", "E" : "Ẽ", "I" : "Ĩ", "N" : "Ñ", "O" : "Õ", "U" : "Ũ", "V" : "Ṽ", "Y" : "Ỹ", "a" : "ã", "e" : "ẽ", "i" : "ĩ", "n" : "ñ", "o" : "õ", "u" : "ũ", "v" : "ṽ", "y" : "ỹ" }, "b" : { "B" : "Ḇ", "D" : "Ḏ", "K" : "Ḵ", "L" : "Ḻ", "N" : "Ṉ", "R" : "Ṟ", "T" : "Ṯ", "Z" : "Ẕ", "b" : "ḇ", "d" : "ḏ", "h" : "ẖ", "k" : "ḵ", "l" : "ḻ", "n" : "ṉ", "r" : "ṟ", "t" : "ṯ", "z" : "ẕ" }, "c" : { "C" : "Ç", "D" : "Ḑ", "E" : "Ȩ", "G" : "Ģ", "H" : "Ḩ", "K" : "Ķ", "L" : "Ļ", "N" : "Ņ", "R" : "Ŗ", "S" : "Ş", "T" : "Ţ", "c" : "ç", "d" : "ḑ", "e" : "ȩ", "h" : "ḩ", "k" : "ķ", "l" : "ļ", "n" : "ņ", "r" : "ŗ", "s" : "ş", "t" : "ţ" }, "d" : { "A" : "Ạ", "B" : "Ḅ", "D" : "Ḍ", "E" : "Ẹ", "H" : "Ḥ", "I" : "Ị", "K" : "Ḳ", "L" : "Ḷ", "M" : "Ṃ", "N" : "Ṇ", "O" : "Ọ", "R" : "Ṛ", "S" : "Ṣ", "T" : "Ṭ", "U" : "Ụ", "V" : "Ṿ", "W" : "Ẉ", "Y" : "Ỵ", "Z" : "Ẓ", "a" : "ạ", "b" : "ḅ", "d" : "ḍ", "e" : "ẹ", "h" : "ḥ", "i" : "ị", "k" : "ḳ", "l" : "ḷ", "m" : "ṃ", "n" : "ṇ", "o" : "ọ", "r" : "ṛ", "s" : "ṣ", "t" : "ṭ", "u" : "ụ", "v" : "ṿ", "w" : "ẉ", "y" : "ỵ", "z" : "ẓ" }, "r" : { "A" : "Å", "U" : "Ů", "a" : "å", "u" : "ů", "w" : "ẘ", "y" : "ẙ" }, "v" : { "A" : "Ǎ", "C" : "Č", "D" : "Ď", "E" : "Ě", "G" : "Ǧ", "H" : "Ȟ", "I" : "Ǐ", "K" : "Ǩ", "N" : "Ň", "O" : "Ǒ", "R" : "Ř", "S" : "Š", "T" : "Ť", "U" : "Ǔ", "Z" : "Ž", "a" : "ǎ", "c" : "č", "e" : "ě", "g" : "ǧ", "h" : "ȟ", "i" : "ǐ", "k" : "ǩ", "n" : "ň", "o" : "ǒ", "r" : "ř", "s" : "š", "u" : "ǔ", "z" : "ž" }, "u" : { "A" : "Ă", "E" : "Ĕ", "G" : "Ğ", "I" : "Ĭ", "O" : "Ŏ", "U" : "Ŭ", "a" : "ă", "e" : "ĕ", "g" : "ğ", "i" : "ĭ", "o" : "ŏ", "u" : "ŭ" }, "$": "$", "%": "%", "{": "{", "}": "}", "&": "&", "_": "_", "/": " ", // is this correct? "o": "ø", "O": "Ø", "l": "ł", "L": "Ł", "P": "¶", "S": "§" } var strings = { "copyright": "©", "dag": "†", "ddag": "‡", "dots": "…", "pounds": "£", "AA": "Å", "aa": "å", "AE": "Æ", "ae": "æ", "OE": "Œ", "oe": "œ", "ss": "ß", "SS": "SS" } var commands = { "em" : "i", "emph" : "i", "bf" : "b" } var processText = function(text) { var value = text.nodeValue; if (jsTeX.log) log("process: '" + value + "'"); // first of all adjust quotes var startIndex = value.indexOf("``"); if (startIndex > -1) { var endIndex = value.indexOf("''"); if (endIndex > -1) { text.nodeValue = value = value.replace(/``/,"“").replace(/''/,"”"); } } var mode = 0; // 0 = regular mode var state = 0; // 0 = regular state var scopes = []; var i = 0; var start = 0; var nested = 0; var command = ""; var params = ""; var processCommand = function() { if (jsTeX.log) log("command '" + command + "'('" + params + "')"); var n = commands[command]; if (n) { if (jsTeX.log) log("tag: " + command + " -> " + n); var e = document.createElement(n); var t = document.createTextNode(params); e.appendChild(t); text.parentNode.replaceChild(e,text); text = t; processElement(e); } else { var n = strings[command]; if (n) { if (jsTeX.log) log("string: " + command + " -> " + n); var value = text.nodeValue; var index1 = value.indexOf(command); var index2 = value.indexOf(params,index1); value = value.substring(0,index-1) + n + params + value.substring(index2 + params.length + 1); } else { var c = command.charAt(0); var ch = command.charAt(1); command = command.substring(0,2); var table = chars[c]; if (table) { if (typeof table == "object") { if (ch) { n = table[ch]; } else if (params) { n = table[params]; } } else if (typeof table == "string") { n = table; command = command.substring(0,1); } if (!n) { if (ch) { n = ch; } else if (params) { n = params; } } if (jsTeX.log) log("char " + command + " -> " + n); var value = text.nodeValue; var index = value.indexOf(command); if (ch) { value = value.substring(0,index-1) + n + params + value.substring(index + command.length); } else if (params) { if (typeof table == "string") { value = value.substring(0,index-1) + n + params + value.substring(index + command.length + 2 + params.length); } else { value = value.substring(0,index-1) + n + value.substring(index + command.length + 2 + params.length); } } else { value = value.substring(0,index-1) + n + value.substring(index + command.length); } } else { value = (params) ? params : ""; } } text.nodeValue = value; } command = ""; params = ""; return text; } var processMath = function() { if (jsTeX.log) log("math: " + start + " " + i + " " + value.length); var e = document.createElement("SPAN"); e.className = "math"; text.parentNode.replaceChild(e,text); e.appendChild(text); if (typeof window.jsMath != "undefined") { jsMath.ProcessBeforeShowing(e.parentNode); } else { jsTeX.log("can't process TeX math since jsMath was not found"); } } var split = function() { if (jsTeX.log) log("split: " + start + " " + i + " " + value.length); if (i < value.length) text.splitText(i); if (start > 1) text.splitText(start - 1); if (start === 1 && i == value.length) { if (value.charAt(0) === "\\") { text = processCommand(); } else if (value.charAt(0) === "$") { value = text.nodeValue; text.nodeValue = value.substring(1,value.length - 1); processMath(); return; } else { value = text.nodeValue; text.nodeValue = value.substring(1,value.length - 1); } } processText(text); // NOTE: the processElement method will continue // with the processing of the new sibling text nodes // created with splitText() so we need to return right after // invoking this method } while (i < value.length) { var ch = value.charAt(i++); if (jsTeX.log) log("ch: " + ch + " " + mode + " " + state + " " + nested); switch(mode) { case 1: // math mode switch(ch) { case "$": split(); return; default: // ignore the rest in math mode (since jsMath does this job) } break; case 2: // inline command mode if (state === 1) { // collecting command parameters switch(ch) { case "{": if (value.charAt(i - 2) != '\\') { // avoid counting escaped ones nested++; } params += ch; break; case "}": if (value.charAt(i - 2) != '\\') { // avoid counting escaped ones nested--; } if (nested === 0) { split(); return; } else { params += ch; } break; default: params += ch; } } else { if (i == start + 1) { // needed for \{ and \} escapes command += ch; } else { switch(ch) { case "{": state = 1; // collecting command parameters nested++; break; case " ": var tag = commands[command]; if (jsTeX.log) log("command: " + command + " -> " + tag); if (nested == 0 && typeof tag == "undefined") { i--; split(); return; } else { nested++; // fake an open brace state = 1; // collecting command parameter break; } case "}": split(); return; default: command += ch; } } } break; case 3: // scope mode switch(ch) { case "{": if (value.charAt(i - 2) != '\\') { // avoid counting escaped ones nested++; } break; case "}": if (value.charAt(i - 2) != '\\') { // avoid counting escaped ones nested--; } if (nested === 0) { split(); return; } default: } break; default: // in all other modes switch(ch) { case "$": mode = 1; // enter math mode start = i; break; case "\\": mode = 2; // command mode start = i; break; case "~": value = value.substr(0, i - 1) + " " + value.substr(i); text.nodeValue = value; break; case "{": mode = 3 // scope mode nested++; start = i; break; default: } } } if (command != '') { processCommand(); } } var processElement = function(elmt) { if (jsTeX.log) log("processElement: " + elmt); var children = elmt.childNodes; if (children) { for (var i = 0; i < children.length; i++) { var e = children[i]; if (e.nodeType == 3) { processText(e); } else { processElement(e); } } } } window.jsTeX = { version: "1.0", log: false, process: function(elmt) { if (elmt.normalize) elmt.normalize(); processElement(elmt); } }; } })();