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main.js (1467B)

      1 function init() {
      2     var input = document.getElementById("input");
      3     var math = document.getElementById("math");
      4     var permalink = document.getElementById("permalink");
      5 
      6     if ("oninput" in input) {
      7         input.addEventListener("input", reprocess, false);
      8     } else {
      9         input.attachEvent("onkeyup", reprocess);
     10     }
     11 
     12     if ("addEventListener" in permalink) {
     13         permalink.addEventListener("click", setSearch);
     14     } else {
     15         permalink.attachEvent("click", setSearch);
     16     }
     17 
     18     var match = (/(?:^\?|&)text=([^&]*)/).exec(window.location.search);
     19     if (match) {
     20         input.value = decodeURIComponent(match[1]);
     21     }
     22 
     23     var macros = {};
     24     var options = {};
     25     var macroRegex = /(?:^\?|&)(?:\\|%5[Cc])([A-Za-z]+)=([^&]*)/g;
     26     var macroString = "";
     27     while ((match = macroRegex.exec(window.location.search)) !== null) {
     28         options.macros = macros;
     29         macros["\\" + match[1]] = decodeURIComponent(match[2]);
     30         macroString += "&" + match[0].substr(1);
     31     }
     32 
     33     reprocess();
     34 
     35     function setSearch() {
     36         window.location.search =
     37             "?text=" + encodeURIComponent(input.value) + macroString;
     38     }
     39 
     40     function reprocess() {
     41         try {
     42             katex.render(input.value, math, options);
     43         } catch (e) {
     44             if (e.__proto__ == katex.ParseError.prototype) {
     45                 console.error(e);
     46             } else {
     47                 throw e;
     48             }
     49         }
     50     }
     51 }
     52 
     53 init();