// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of html;
$ANNOTATIONS
/**
 * The base class for all documents.
 *
 * Each web page loaded in the browser has its own [Document] object, which is
 * typically an [HtmlDocument].
 *
 * If you aren't comfortable with DOM concepts, see the Dart tutorial
 * [Target 2: Connect Dart & HTML](http://www.dartlang.org/docs/tutorials/connect-dart-html/).
 */
class $CLASSNAME extends Node $NATIVESPEC
{

$!MEMBERS

  /**
   * Finds the first descendant element of this document that matches the
   * specified group of selectors.
   *
   * Unless your webpage contains multiple documents, the top-level query
   * method behaves the same as this method, so you should use it instead to
   * save typing a few characters.
   *
   * [selectors] should be a string using CSS selector syntax.
   *     var element1 = document.query('.className');
   *     var element2 = document.query('#id');
   *
   * For details about CSS selector syntax, see the
   * [CSS selector specification](http://www.w3.org/TR/css3-selectors/).
   */
  Element query(String selectors) {
    // It is fine for our RegExp to detect element id query selectors to have
    // false negatives but not false positives.
    if (new RegExp("^#[_a-zA-Z]\\w*\$").hasMatch(selectors)) {
      return $dom_getElementById(selectors.substring(1));
    }
    return $dom_querySelector(selectors);
  }

  /**
   * Finds all descendant elements of this document that match the specified
   * group of selectors.
   *
   * Unless your webpage contains multiple documents, the top-level queryAll
   * method behaves the same as this method, so you should use it instead to
   * save typing a few characters.
   *
   * [selectors] should be a string using CSS selector syntax.
   *     var items = document.queryAll('.itemClassName');
   *
   * For details about CSS selector syntax, see the
   * [CSS selector specification](http://www.w3.org/TR/css3-selectors/).
   */
  List<Element> queryAll(String selectors) {
    if (new RegExp("""^\\[name=["'][^'"]+['"]\\]\$""").hasMatch(selectors)) {
      final mutableMatches = $dom_getElementsByName(
          selectors.substring(7,selectors.length - 2));
      int len = mutableMatches.length;
      final copyOfMatches = new List<Element>.fixedLength(len);
      for (int i = 0; i < len; ++i) {
        copyOfMatches[i] = mutableMatches[i];
      }
      return new _FrozenElementList._wrap(copyOfMatches);
    } else if (new RegExp("^[*a-zA-Z0-9]+\$").hasMatch(selectors)) {
      final mutableMatches = $dom_getElementsByTagName(selectors);
      int len = mutableMatches.length;
      final copyOfMatches = new List<Element>.fixedLength(len);
      for (int i = 0; i < len; ++i) {
        copyOfMatches[i] = mutableMatches[i];
      }
      return new _FrozenElementList._wrap(copyOfMatches);
    } else {
      return new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
    }
  }
}