package.addon.fold.brace-fold.js Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of codemirror Show documentation
Basic configuration for the CodeMirror code editor
The newest version!
// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/5/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

function bracketFolding(pairs) {
  return function(cm, start) {
    var line = start.line, lineText = cm.getLine(line);

    function findOpening(pair) {
      var tokenType;
      for (var at = start.ch, pass = 0;;) {
        var found = at <= 0 ? -1 : lineText.lastIndexOf(pair[0], at - 1);
        if (found == -1) {
          if (pass == 1) break;
          pass = 1;
          at = lineText.length;
          continue;
        }
        if (pass == 1 && found < start.ch) break;
        tokenType = cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1));
        if (!/^(comment|string)/.test(tokenType)) return {ch: found + 1, tokenType: tokenType, pair: pair};
        at = found - 1;
      }
    }

    function findRange(found) {
      var count = 1, lastLine = cm.lastLine(), end, startCh = found.ch, endCh
      outer: for (var i = line; i <= lastLine; ++i) {
        var text = cm.getLine(i), pos = i == line ? startCh : 0;
        for (;;) {
          var nextOpen = text.indexOf(found.pair[0], pos), nextClose = text.indexOf(found.pair[1], pos);
          if (nextOpen < 0) nextOpen = text.length;
          if (nextClose < 0) nextClose = text.length;
          pos = Math.min(nextOpen, nextClose);
          if (pos == text.length) break;
          if (cm.getTokenTypeAt(CodeMirror.Pos(i, pos + 1)) == found.tokenType) {
            if (pos == nextOpen) ++count;
            else if (!--count) { end = i; endCh = pos; break outer; }
          }
          ++pos;
        }
      }

      if (end == null || line == end) return null
      return {from: CodeMirror.Pos(line, startCh),
              to: CodeMirror.Pos(end, endCh)};
    }

    var found = []
    for (var i = 0; i < pairs.length; i++) {
      var open = findOpening(pairs[i])
      if (open) found.push(open)
    }
    found.sort(function(a, b) { return a.ch - b.ch })
    for (var i = 0; i < found.length; i++) {
      var range = findRange(found[i])
      if (range) return range
    }
    return null
  }
}

CodeMirror.registerHelper("fold", "brace", bracketFolding([["{", "}"], ["[", "]"]]));

CodeMirror.registerHelper("fold", "brace-paren", bracketFolding([["{", "}"], ["[", "]"], ["(", ")"]]));

CodeMirror.registerHelper("fold", "import", function(cm, start) {
  function hasImport(line) {
    if (line < cm.firstLine() || line > cm.lastLine()) return null;
    var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
    if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
    if (start.type != "keyword" || start.string != "import") return null;
    // Now find closing semicolon, return its position
    for (var i = line, e = Math.min(cm.lastLine(), line + 10); i <= e; ++i) {
      var text = cm.getLine(i), semi = text.indexOf(";");
      if (semi != -1) return {startCh: start.end, end: CodeMirror.Pos(i, semi)};
    }
  }

  var startLine = start.line, has = hasImport(startLine), prev;
  if (!has || hasImport(startLine - 1) || ((prev = hasImport(startLine - 2)) && prev.end.line == startLine - 1))
    return null;
  for (var end = has.end;;) {
    var next = hasImport(end.line + 1);
    if (next == null) break;
    end = next.end;
  }
  return {from: cm.clipPos(CodeMirror.Pos(startLine, has.startCh + 1)), to: end};
});

CodeMirror.registerHelper("fold", "include", function(cm, start) {
  function hasInclude(line) {
    if (line < cm.firstLine() || line > cm.lastLine()) return null;
    var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
    if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
    if (start.type == "meta" && start.string.slice(0, 8) == "#include") return start.start + 8;
  }

  var startLine = start.line, has = hasInclude(startLine);
  if (has == null || hasInclude(startLine - 1) != null) return null;
  for (var end = startLine;;) {
    var next = hasInclude(end + 1);
    if (next == null) break;
    ++end;
  }
  return {from: CodeMirror.Pos(startLine, has + 1),
          to: cm.clipPos(CodeMirror.Pos(end))};
});

});