github.com/elliott5/community@v0.14.1-0.20160709191136-823126fb026a/app/public/codemirror/addon/fold/brace-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", "brace", function(cm, start) {
    15    var line = start.line, lineText = cm.getLine(line);
    16    var startCh, tokenType;
    17  
    18    function findOpening(openCh) {
    19      for (var at = start.ch, pass = 0;;) {
    20        var found = at <= 0 ? -1 : lineText.lastIndexOf(openCh, at - 1);
    21        if (found == -1) {
    22          if (pass == 1) break;
    23          pass = 1;
    24          at = lineText.length;
    25          continue;
    26        }
    27        if (pass == 1 && found < start.ch) break;
    28        tokenType = cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1));
    29        if (!/^(comment|string)/.test(tokenType)) return found + 1;
    30        at = found - 1;
    31      }
    32    }
    33  
    34    var startToken = "{", endToken = "}", startCh = findOpening("{");
    35    if (startCh == null) {
    36      startToken = "[", endToken = "]";
    37      startCh = findOpening("[");
    38    }
    39  
    40    if (startCh == null) return;
    41    var count = 1, lastLine = cm.lastLine(), end, endCh;
    42    outer: for (var i = line; i <= lastLine; ++i) {
    43      var text = cm.getLine(i), pos = i == line ? startCh : 0;
    44      for (;;) {
    45        var nextOpen = text.indexOf(startToken, pos), nextClose = text.indexOf(endToken, pos);
    46        if (nextOpen < 0) nextOpen = text.length;
    47        if (nextClose < 0) nextClose = text.length;
    48        pos = Math.min(nextOpen, nextClose);
    49        if (pos == text.length) break;
    50        if (cm.getTokenTypeAt(CodeMirror.Pos(i, pos + 1)) == tokenType) {
    51          if (pos == nextOpen) ++count;
    52          else if (!--count) { end = i; endCh = pos; break outer; }
    53        }
    54        ++pos;
    55      }
    56    }
    57    if (end == null || line == end && endCh == startCh) return;
    58    return {from: CodeMirror.Pos(line, startCh),
    59            to: CodeMirror.Pos(end, endCh)};
    60  });
    61  
    62  CodeMirror.registerHelper("fold", "import", function(cm, start) {
    63    function hasImport(line) {
    64      if (line < cm.firstLine() || line > cm.lastLine()) return null;
    65      var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
    66      if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
    67      if (start.type != "keyword" || start.string != "import") return null;
    68      // Now find closing semicolon, return its position
    69      for (var i = line, e = Math.min(cm.lastLine(), line + 10); i <= e; ++i) {
    70        var text = cm.getLine(i), semi = text.indexOf(";");
    71        if (semi != -1) return {startCh: start.end, end: CodeMirror.Pos(i, semi)};
    72      }
    73    }
    74  
    75    var start = start.line, has = hasImport(start), prev;
    76    if (!has || hasImport(start - 1) || ((prev = hasImport(start - 2)) && prev.end.line == start - 1))
    77      return null;
    78    for (var end = has.end;;) {
    79      var next = hasImport(end.line + 1);
    80      if (next == null) break;
    81      end = next.end;
    82    }
    83    return {from: cm.clipPos(CodeMirror.Pos(start, has.startCh + 1)), to: end};
    84  });
    85  
    86  CodeMirror.registerHelper("fold", "include", function(cm, start) {
    87    function hasInclude(line) {
    88      if (line < cm.firstLine() || line > cm.lastLine()) return null;
    89      var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
    90      if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
    91      if (start.type == "meta" && start.string.slice(0, 8) == "#include") return start.start + 8;
    92    }
    93  
    94    var start = start.line, has = hasInclude(start);
    95    if (has == null || hasInclude(start - 1) != null) return null;
    96    for (var end = start;;) {
    97      var next = hasInclude(end + 1);
    98      if (next == null) break;
    99      ++end;
   100    }
   101    return {from: CodeMirror.Pos(start, has + 1),
   102            to: cm.clipPos(CodeMirror.Pos(end))};
   103  });
   104  
   105  });