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   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/LICENSE
   3  
   4  (function(mod) {
   5    if (typeof exports == "object" && typeof module == "object") // CommonJS
   6      mod(require("../../lib/codemirror"));
   7    else if (typeof define == "function" && define.amd) // AMD
   8      define(["../../lib/codemirror"], mod);
   9    else // Plain browser env
  10      mod(CodeMirror);
  11  })(function(CodeMirror) {
  12  "use strict";
  13  
  14  CodeMirror.runMode = function(string, modespec, callback, options) {
  15    var mode = CodeMirror.getMode(CodeMirror.defaults, modespec);
  16    var tabSize = (options && options.tabSize) || CodeMirror.defaults.tabSize;
  17  
  18    // Create a tokenizing callback function if passed-in callback is a DOM element.
  19    if (callback.appendChild) {
  20      var ie = /MSIE \d/.test(navigator.userAgent);
  21      var ie_lt9 = ie && (document.documentMode == null || document.documentMode < 9);
  22      var node = callback, col = 0;
  23      node.innerHTML = "";
  24      callback = function(text, style) {
  25        if (text == "\n") {
  26          // Emitting LF or CRLF on IE8 or earlier results in an incorrect display.
  27          // Emitting a carriage return makes everything ok.
  28          node.appendChild(document.createTextNode(ie_lt9 ? '\r' : text));
  29          col = 0;
  30          return;
  31        }
  32        var content = "";
  33        // replace tabs
  34        for (var pos = 0;;) {
  35          var idx = text.indexOf("\t", pos);
  36          if (idx == -1) {
  37            content += text.slice(pos);
  38            col += text.length - pos;
  39            break;
  40          } else {
  41            col += idx - pos;
  42            content += text.slice(pos, idx);
  43            var size = tabSize - col % tabSize;
  44            col += size;
  45            for (var i = 0; i < size; ++i) content += " ";
  46            pos = idx + 1;
  47          }
  48        }
  49        // Create a node with token style and append it to the callback DOM element.
  50        if (style) {
  51          var sp = node.appendChild(document.createElement("span"));
  52          sp.className = "cm-" + style.replace(/ +/g, " cm-");
  53          sp.appendChild(document.createTextNode(content));
  54        } else {
  55          node.appendChild(document.createTextNode(content));
  56        }
  57      };
  58    }
  59  
  60    var lines = CodeMirror.splitLines(string), state = (options && options.state) || CodeMirror.startState(mode);
  61    for (var i = 0, e = lines.length; i < e; ++i) {
  62      if (i) callback("\n");
  63      var stream = new CodeMirror.StringStream(lines[i], null, {
  64        lookAhead: function(n) { return lines[i + n] },
  65        baseToken: function() {}
  66      });
  67      if (!stream.string && mode.blankLine) mode.blankLine(state);
  68      while (!stream.eol()) {
  69        var style = mode.token(stream, state);
  70        callback(stream.current(), style, i, stream.start, state, mode);
  71        stream.start = stream.pos;
  72      }
  73    }
  74  };
  75  
  76  });