GPQAPP

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// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: https://codemirror.net/LICENSE
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(function(mod) {
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  if (typeof exports == "object" && typeof module == "object") // CommonJS
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    mod(require("../../lib/codemirror"));
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  else if (typeof define == "function" && define.amd) // AMD
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    define(["../../lib/codemirror"], mod);
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  else // Plain browser env
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    mod(CodeMirror);
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})(function(CodeMirror) {
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"use strict";
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function bracketFolding(pairs) {
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  return function(cm, start) {
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    var line = start.line, lineText = cm.getLine(line);
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    function findOpening(pair) {
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      var tokenType;
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      for (var at = start.ch, pass = 0;;) {
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        var found = at <= 0 ? -1 : lineText.lastIndexOf(pair[0], at - 1);
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        if (found == -1) {
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          if (pass == 1) break;
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          pass = 1;
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          at = lineText.length;
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          continue;
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        }
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        if (pass == 1 && found < start.ch) break;
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        tokenType = cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1));
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        if (!/^(comment|string)/.test(tokenType)) return {ch: found + 1, tokenType: tokenType, pair: pair};
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        at = found - 1;
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      }
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    }
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    function findRange(found) {
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      var count = 1, lastLine = cm.lastLine(), end, startCh = found.ch, endCh
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      outer: for (var i = line; i <= lastLine; ++i) {
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        var text = cm.getLine(i), pos = i == line ? startCh : 0;
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        for (;;) {
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          var nextOpen = text.indexOf(found.pair[0], pos), nextClose = text.indexOf(found.pair[1], pos);
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          if (nextOpen < 0) nextOpen = text.length;
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          if (nextClose < 0) nextClose = text.length;
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          pos = Math.min(nextOpen, nextClose);
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          if (pos == text.length) break;
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          if (cm.getTokenTypeAt(CodeMirror.Pos(i, pos + 1)) == found.tokenType) {
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            if (pos == nextOpen) ++count;
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            else if (!--count) { end = i; endCh = pos; break outer; }
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          }
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          ++pos;
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        }
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      }
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      if (end == null || line == end) return null
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      return {from: CodeMirror.Pos(line, startCh),
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              to: CodeMirror.Pos(end, endCh)};
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    }
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    var found = []
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    for (var i = 0; i < pairs.length; i++) {
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      var open = findOpening(pairs[i])
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      if (open) found.push(open)
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    }
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    found.sort(function(a, b) { return a.ch - b.ch })
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    for (var i = 0; i < found.length; i++) {
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      var range = findRange(found[i])
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      if (range) return range
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    }
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    return null
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  }
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}
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CodeMirror.registerHelper("fold", "brace", bracketFolding([["{", "}"], ["[", "]"]]));
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CodeMirror.registerHelper("fold", "brace-paren", bracketFolding([["{", "}"], ["[", "]"], ["(", ")"]]));
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CodeMirror.registerHelper("fold", "import", function(cm, start) {
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  function hasImport(line) {
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    if (line < cm.firstLine() || line > cm.lastLine()) return null;
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    var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
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    if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
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    if (start.type != "keyword" || start.string != "import") return null;
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    // Now find closing semicolon, return its position
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    for (var i = line, e = Math.min(cm.lastLine(), line + 10); i <= e; ++i) {
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      var text = cm.getLine(i), semi = text.indexOf(";");
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      if (semi != -1) return {startCh: start.end, end: CodeMirror.Pos(i, semi)};
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    }
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  }
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  var startLine = start.line, has = hasImport(startLine), prev;
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  if (!has || hasImport(startLine - 1) || ((prev = hasImport(startLine - 2)) && prev.end.line == startLine - 1))
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    return null;
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  for (var end = has.end;;) {
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    var next = hasImport(end.line + 1);
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    if (next == null) break;
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    end = next.end;
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  }
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  return {from: cm.clipPos(CodeMirror.Pos(startLine, has.startCh + 1)), to: end};
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});
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CodeMirror.registerHelper("fold", "include", function(cm, start) {
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  function hasInclude(line) {
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    if (line < cm.firstLine() || line > cm.lastLine()) return null;
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    var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
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    if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
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    if (start.type == "meta" && start.string.slice(0, 8) == "#include") return start.start + 8;
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  }
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  var startLine = start.line, has = hasInclude(startLine);
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  if (has == null || hasInclude(startLine - 1) != null) return null;
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  for (var end = startLine;;) {
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    var next = hasInclude(end + 1);
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    if (next == null) break;
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    ++end;
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  }
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  return {from: CodeMirror.Pos(startLine, has + 1),
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          to: cm.clipPos(CodeMirror.Pos(end))};
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});
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});
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