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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    var listRE = /^(\s*)(>[> ]*|[*+-] \[[x ]\]\s|[*+-]\s|(\d+)([.)]))(\s*)/,
  15        emptyListRE = /^(\s*)(>[> ]*|[*+-] \[[x ]\]|[*+-]|(\d+)[.)])(\s*)$/,
  16        unorderedListRE = /[*+-]\s/;
  17  
  18    CodeMirror.commands.newlineAndIndentContinueMarkdownList = function(cm) {
  19      if (cm.getOption("disableInput")) return CodeMirror.Pass;
  20      var ranges = cm.listSelections(), replacements = [];
  21      for (var i = 0; i < ranges.length; i++) {
  22        var pos = ranges[i].head;
  23  
  24        // If we're not in Markdown mode, fall back to normal newlineAndIndent
  25        var eolState = cm.getStateAfter(pos.line);
  26        var inner = CodeMirror.innerMode(cm.getMode(), eolState);
  27        if (inner.mode.name !== "markdown" && inner.mode.helperType !== "markdown") {
  28          cm.execCommand("newlineAndIndent");
  29          return;
  30        } else {
  31          eolState = inner.state;
  32        }
  33  
  34        var inList = eolState.list !== false;
  35        var inQuote = eolState.quote !== 0;
  36  
  37        var line = cm.getLine(pos.line), match = listRE.exec(line);
  38        var cursorBeforeBullet = /^\s*$/.test(line.slice(0, pos.ch));
  39        if (!ranges[i].empty() || (!inList && !inQuote) || !match || cursorBeforeBullet) {
  40          cm.execCommand("newlineAndIndent");
  41          return;
  42        }
  43        if (emptyListRE.test(line)) {
  44          var endOfQuote = inQuote && />\s*$/.test(line)
  45          var endOfList = !/>\s*$/.test(line)
  46          if (endOfQuote || endOfList) cm.replaceRange("", {
  47            line: pos.line, ch: 0
  48          }, {
  49            line: pos.line, ch: pos.ch + 1
  50          });
  51          replacements[i] = "\n";
  52        } else {
  53          var indent = match[1], after = match[5];
  54          var numbered = !(unorderedListRE.test(match[2]) || match[2].indexOf(">") >= 0);
  55          var bullet = numbered ? (parseInt(match[3], 10) + 1) + match[4] : match[2].replace("x", " ");
  56          replacements[i] = "\n" + indent + bullet + after;
  57  
  58          if (numbered) incrementRemainingMarkdownListNumbers(cm, pos);
  59        }
  60      }
  61  
  62      cm.replaceSelections(replacements);
  63    };
  64  
  65    // Auto-updating Markdown list numbers when a new item is added to the
  66    // middle of a list
  67    function incrementRemainingMarkdownListNumbers(cm, pos) {
  68      var startLine = pos.line, lookAhead = 0, skipCount = 0;
  69      var startItem = listRE.exec(cm.getLine(startLine)), startIndent = startItem[1];
  70  
  71      do {
  72        lookAhead += 1;
  73        var nextLineNumber = startLine + lookAhead;
  74        var nextLine = cm.getLine(nextLineNumber), nextItem = listRE.exec(nextLine);
  75  
  76        if (nextItem) {
  77          var nextIndent = nextItem[1];
  78          var newNumber = (parseInt(startItem[3], 10) + lookAhead - skipCount);
  79          var nextNumber = (parseInt(nextItem[3], 10)), itemNumber = nextNumber;
  80  
  81          if (startIndent === nextIndent && !isNaN(nextNumber)) {
  82            if (newNumber === nextNumber) itemNumber = nextNumber + 1;
  83            if (newNumber > nextNumber) itemNumber = newNumber + 1;
  84            cm.replaceRange(
  85              nextLine.replace(listRE, nextIndent + itemNumber + nextItem[4] + nextItem[5]),
  86            {
  87              line: nextLineNumber, ch: 0
  88            }, {
  89              line: nextLineNumber, ch: nextLine.length
  90            });
  91          } else {
  92            if (startIndent.length > nextIndent.length) return;
  93            // This doesn't run if the next line immediately indents, as it is
  94            // not clear of the users intention (new indented item or same level)
  95            if ((startIndent.length < nextIndent.length) && (lookAhead === 1)) return;
  96            skipCount += 1;
  97          }
  98        }
  99      } while (nextItem);
 100    }
 101  });