github.com/elliott5/community@v0.14.1-0.20160709191136-823126fb026a/app/public/codemirror/addon/fold/indent-fold.js (about)

     1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
     2  // Distributed under an MIT license: http://codemirror.net/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.registerHelper("fold", "indent", function(cm, start) {
    15    var tabSize = cm.getOption("tabSize"), firstLine = cm.getLine(start.line);
    16    if (!/\S/.test(firstLine)) return;
    17    var getIndent = function(line) {
    18      return CodeMirror.countColumn(line, null, tabSize);
    19    };
    20    var myIndent = getIndent(firstLine);
    21    var lastLineInFold = null;
    22    // Go through lines until we find a line that definitely doesn't belong in
    23    // the block we're folding, or to the end.
    24    for (var i = start.line + 1, end = cm.lastLine(); i <= end; ++i) {
    25      var curLine = cm.getLine(i);
    26      var curIndent = getIndent(curLine);
    27      if (curIndent > myIndent) {
    28        // Lines with a greater indent are considered part of the block.
    29        lastLineInFold = i;
    30      } else if (!/\S/.test(curLine)) {
    31        // Empty lines might be breaks within the block we're trying to fold.
    32      } else {
    33        // A non-empty line at an indent equal to or less than ours marks the
    34        // start of another block.
    35        break;
    36      }
    37    }
    38    if (lastLineInFold) return {
    39      from: CodeMirror.Pos(start.line, firstLine.length),
    40      to: CodeMirror.Pos(lastLineInFold, cm.getLine(lastLineInFold).length)
    41    };
    42  });
    43  
    44  });