1  /*
     2   * Copyright the original author or authors.
     3   * 
     4   * Licensed under the MOZILLA PUBLIC LICENSE, Version 1.1 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   * 
     8   *      http://www.mozilla.org/MPL/MPL-1.1.html
     9   * 
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  import org.as2lib.regexp.AsciiUtil;
    18  import org.as2lib.regexp.node.Node; 
    19  import org.as2lib.regexp.node.TreeInfo;
    20   
    21  /**
    22   * {@code SliceU} is a node class for a sequence of case independent 
    23   * unicode characters.
    24   * 
    25   * @author Igor Sadovskiy
    26   */
    27   
    28  class org.as2lib.regexp.node.SliceU extends Node {
    29  	
    30      private var buffer:Array; 
    31      
    32      public function SliceU(buf:Array) {
    33          buffer = buf;
    34      }
    35      
    36      public function match(matcher:Object, i:Number, seq:String):Boolean {
    37          var buf:Array = buffer;
    38          var len:Number = buf.length;
    39          if (i + len > matcher.to) return false;
    40          
    41          for (var j:Number = 0; j < len; j++) {
    42              var c:Number = seq.charCodeAt(i+j);
    43              c = AsciiUtil.toUpper(c);
    44              c = AsciiUtil.toLower(c);
    45              if (buf[j] != c) return false;
    46          }
    47          
    48          return next.match(matcher, i+len, seq);
    49      }
    50      
    51      public function study(info:TreeInfo):Boolean {
    52          info.minLength += buffer.length;
    53          info.maxLength += buffer.length;
    54          return next.study(info);
    55      }
    56  }
    57  
    58
as2api