text: /* ***** BEGIN LICENSE BLOCK *****
   * Distributed under the BSD license:
   *
   * Copyright (c) 2010, Ajax.org B.V.
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of Ajax.org B.V. nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * ***** END LICENSE BLOCK ***** */
  
  define(function(require, exports, module) {
  "use strict";
  
  var oop = require("../lib/oop");
  var TextMode = require("./text").Mode;
  var LuaHighlightRules = require("./lua_highlight_rules").LuaHighlightRules;
  var LuaFoldMode = require("./folding/lua").FoldMode;
  var Range = require("../range").Range;
  var WorkerClient = require("../worker/worker_client").WorkerClient;
  
  var Mode = function() {
      this.HighlightRules = LuaHighlightRules;
      
      this.foldingRules = new LuaFoldMode();
  };
  oop.inherits(Mode, TextMode);
  
  (function() {
     
      this.lineCommentStart = "--";
      this.blockComment = {start: "--[", end: "]--"};
      
      var indentKeywords = {
          "function": 1,
          "then": 1,
          "do": 1,
          "else": 1,
          "elseif": 1,
          "repeat": 1,
          "end": -1,
          "until": -1
      };
      var outdentKeywords = [
          "else",
          "elseif",
          "end",
          "until"
      ];
  
      function getNetIndentLevel(tokens) {
          var level = 0;
          // Support single-line blocks by decrementing the indent level if
          // an ending token is found
          for (var i = 0; i < tokens.length; i++) {
              var token = tokens[i];
              if (token.type == "keyword") {
                  if (token.value in indentKeywords) {
                      level += indentKeywords[token.value];
                  }
              } else if (token.type == "paren.lparen") {
                  level ++;
              } else if (token.type == "paren.rparen") {
                  level --;
              }
          }
          // Limit the level to +/- 1 since usually users only indent one level
          // at a time regardless of the logical nesting level
          if (level < 0) {
              return -1;
          } else if (level > 0) {
              return 1;
          } else {
              return 0;
          }
      }
  
      this.getNextLineIndent = function(state, line, tab) {
          var indent = this.$getIndent(line);
          var level = 0;
  
          var tokenizedLine = this.getTokenizer().getLineTokens(line, state);
          var tokens = tokenizedLine.tokens;
  
          if (state == "start") {
              level = getNetIndentLevel(tokens);
          }
          if (level > 0) {
              return indent + tab;
          } else if (level < 0 && indent.substr(indent.length - tab.length) == tab) {
              // Don't do a next-line outdent if we're going to do a real outdent of this line
              if (!this.checkOutdent(state, line, "\n")) {
                  return indent.substr(0, indent.length - tab.length);
              }
          }
          return indent;
      };
  
      this.checkOutdent = function(state, line, input) {
          if (input != "\n" && input != "\r" && input != "\r\n")
              return false;
  
          if (line.match(/^\s*[\)\}\]]$/))
              return true;
  
          var tokens = this.getTokenizer().getLineTokens(line.trim(), state).tokens;
  
          if (!tokens || !tokens.length)
              return false;
  
          return (tokens[0].type == "keyword" && outdentKeywords.indexOf(tokens[0].value) != -1);
      };
  
      this.autoOutdent = function(state, session, row) {
          var prevLine = session.getLine(row - 1);
          var prevIndent = this.$getIndent(prevLine).length;
          var prevTokens = this.getTokenizer().getLineTokens(prevLine, "start").tokens;
          var tabLength = session.getTabString().length;
          var expectedIndent = prevIndent + tabLength * getNetIndentLevel(prevTokens);
          var curIndent = this.$getIndent(session.getLine(row)).length;
          if (curIndent < expectedIndent) {
              // User already outdented //
              return;
          }
          session.outdentRows(new Range(row, 0, row + 2, 0));
      };
  
      this.createWorker = function(session) {
          var worker = new WorkerClient(["ace"], "ace/mode/lua_worker", "Worker");
          worker.attachToDocument(session.getDocument());
          
          worker.on("error", function(e) {
              session.setAnnotations([e.data]);
          });
          
          worker.on("ok", function(e) {
              session.clearAnnotations();
          });
          
          return worker;
      };
  
      this.$id = "ace/mode/lua";
  }).call(Mode.prototype);
  
  exports.Mode = Mode;
  });
  
  
  