Subversion Repositories wimsdev

// 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) {

  var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&

    (document.documentMode == null || document.documentMode < 8);

  var Pos = CodeMirror.Pos;

  var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<", "<": ">>", ">": "<<"};

  function bracketRegex(config) {

    return config && config.bracketRegex || /[(){}[\]]/

  }

  function findMatchingBracket(cm, where, config) {

    var line = cm.getLineHandle(where.line), pos = where.ch - 1;

    var afterCursor = config && config.afterCursor

    if (afterCursor == null)

      afterCursor = /(^| )cm-fat-cursor($| )/.test(cm.getWrapperElement().className)

    var re = bracketRegex(config)

    // A cursor is defined as between two characters, but in in vim command mode

    // (i.e. not insert mode), the cursor is visually represented as a

    // highlighted box on top of the 2nd character. Otherwise, we allow matches

    // from before or after the cursor.

    var match = (!afterCursor && pos >= 0 && re.test(line.text.charAt(pos)) && matching[line.text.charAt(pos)]) ||

        re.test(line.text.charAt(pos + 1)) && matching[line.text.charAt(++pos)];

    if (!match) return null;

    var dir = match.charAt(1) == ">" ? 1 : -1;

    if (config && config.strict && (dir > 0) != (pos == where.ch)) return null;

    var style = cm.getTokenTypeAt(Pos(where.line, pos + 1));

    var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style, config);

    if (found == null) return null;

    return {from: Pos(where.line, pos), to: found && found.pos,

            match: found && found.ch == match.charAt(0), forward: dir > 0};

  }

  // bracketRegex is used to specify which type of bracket to scan

  // should be a regexp, e.g. /[[\]]/

  //

  // Note: If "where" is on an open bracket, then this bracket is ignored.

  //

  // Returns false when no bracket was found, null when it reached

  // maxScanLines and gave up

  function scanForBracket(cm, where, dir, style, config) {

    var maxScanLen = (config && config.maxScanLineLength) || 10000;

    var maxScanLines = (config && config.maxScanLines) || 1000;

    var stack = [];

    var re = bracketRegex(config)

    var lineEnd = dir > 0 ? Math.min(where.line + maxScanLines, cm.lastLine() + 1)

                          : Math.max(cm.firstLine() - 1, where.line - maxScanLines);

    for (var lineNo = where.line; lineNo != lineEnd; lineNo += dir) {

      var line = cm.getLine(lineNo);

      if (!line) continue;

      var pos = dir > 0 ? 0 : line.length - 1, end = dir > 0 ? line.length : -1;

      if (line.length > maxScanLen) continue;

      if (lineNo == where.line) pos = where.ch - (dir < 0 ? 1 : 0);

      for (; pos != end; pos += dir) {

        var ch = line.charAt(pos);

        if (re.test(ch) && (style === undefined ||

                            (cm.getTokenTypeAt(Pos(lineNo, pos + 1)) || "") == (style || ""))) {

          var match = matching[ch];

          if (match && (match.charAt(1) == ">") == (dir > 0)) stack.push(ch);

          else if (!stack.length) return {pos: Pos(lineNo, pos), ch: ch};

          else stack.pop();

        }

      }

    }

    return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null;

  }

  function matchBrackets(cm, autoclear, config) {

    // Disable brace matching in long lines, since it'll cause hugely slow updates

    var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000,

      highlightNonMatching = config && config.highlightNonMatching;

    var marks = [], ranges = cm.listSelections();

    for (var i = 0; i < ranges.length; i++) {

      var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, config);

      if (match && (match.match || highlightNonMatching !== false) && cm.getLine(match.from.line).length <= maxHighlightLen) {

        var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";

        marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style}));

        if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen)

          marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style}));

      }

    }

    if (marks.length) {

      // Kludge to work around the IE bug from issue #1193, where text

      // input stops going to the textarea whenever this fires.

      if (ie_lt8 && cm.state.focused) cm.focus();

      var clear = function() {

        cm.operation(function() {

          for (var i = 0; i < marks.length; i++) marks[i].clear();

        });

      };

      if (autoclear) setTimeout(clear, 800);

      else return clear;

    }

  }

  function doMatchBrackets(cm) {

    cm.operation(function() {

      if (cm.state.matchBrackets.currentlyHighlighted) {

        cm.state.matchBrackets.currentlyHighlighted();

        cm.state.matchBrackets.currentlyHighlighted = null;

      }

      cm.state.matchBrackets.currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets);

    });

  }

  function clearHighlighted(cm) {

    if (cm.state.matchBrackets && cm.state.matchBrackets.currentlyHighlighted) {

      cm.state.matchBrackets.currentlyHighlighted();

      cm.state.matchBrackets.currentlyHighlighted = null;

    }

  }

  CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {

    if (old && old != CodeMirror.Init) {

      cm.off("cursorActivity", doMatchBrackets);

      cm.off("focus", doMatchBrackets)

      cm.off("blur", clearHighlighted)

      clearHighlighted(cm);

    }

    if (val) {

      cm.state.matchBrackets = typeof val == "object" ? val : {};

      cm.on("cursorActivity", doMatchBrackets);

      cm.on("focus", doMatchBrackets)

      cm.on("blur", clearHighlighted)

    }

  });

  CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});

  CodeMirror.defineExtension("findMatchingBracket", function(pos, config, oldConfig){

    // Backwards-compatibility kludge

    if (oldConfig || typeof config == "boolean") {

      if (!oldConfig) {

        config = config ? {strict: true} : null

      } else {

        oldConfig.strict = config

        config = oldConfig

      }

    }

    return findMatchingBracket(this, pos, config)

  });

  CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){

    return scanForBracket(this, pos, dir, style, config);

  });

});