// Copyright (c) 2011, 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 $LIBRARYNAME;

class _AttributeClassSet extends CssClassSetImpl {
  final Element _element;

  _AttributeClassSet(this._element);

  Set<String> readClasses() {
    var classname = _element.attributes['class'];

    Set<String> s = new LinkedHashSet<String>();
    if (classname == null) {
      return s;
    }
    for (String name in classname.split(' ')) {
      String trimmed = name.trim();
      if (!trimmed.isEmpty) {
        s.add(trimmed);
      }
    }
    return s;
  }

  void writeClasses(Set s) {
    _element.attributes['class'] = s.join(' ');
  }
}

$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
  static final _START_TAG_REGEXP = new RegExp('<(\\w+)');

  factory $CLASSNAME.tag(String tag) =>
      document.createElementNS("http://www.w3.org/2000/svg", tag);
  factory $CLASSNAME.svg(String svg,
      {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {

    if (validator == null && treeSanitizer == null) {
      validator = new NodeValidatorBuilder.common()..allowSvg();
    }

    final match = _START_TAG_REGEXP.firstMatch(svg);
    var parentElement;
    if (match != null && match.group(1).toLowerCase() == 'svg') {
      parentElement = document.body;
    } else {
      parentElement = new SvgSvgElement();
    }
    var fragment = parentElement.createFragment(svg, validator: validator,
        treeSanitizer: treeSanitizer);
    return fragment.nodes.where((e) => e is SvgElement).single;
  }

  CssClassSet get classes => new _AttributeClassSet(this);

  List<Element> get children => new FilteredElementList(this);

  set children(List<Element> value) {
    final children = this.children;
    children.clear();
    children.addAll(value);
  }

  String get outerHtml {
    final container = new Element.tag("div");
    final SvgElement cloned = this.clone(true);
    container.children.add(cloned);
    return container.innerHtml;
  }

  String get innerHtml {
    final container = new Element.tag("div");
    final SvgElement cloned = this.clone(true);
    container.children.addAll(cloned.children);
    return container.innerHtml;
  }

  set innerHtml(String value) {
    this.setInnerHtml(value);
  }

  DocumentFragment createFragment(String svg,
      {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {

    if (treeSanitizer == null) {
      if (validator == null) {
        validator = new NodeValidatorBuilder.common()
          ..allowSvg();
      }
      treeSanitizer = new NodeTreeSanitizer(validator);
    }

    // We create a fragment which will parse in the HTML parser
    var html = '<svg version="1.1">$svg</svg>';
    var fragment = document.body.createFragment(html,
        treeSanitizer: treeSanitizer);

    var svgFragment = new DocumentFragment();
    // The root is the <svg/> element, need to pull out the contents.
    var root = fragment.nodes.single;
    while (root.firstChild != null) {
      svgFragment.append(root.firstChild);
    }
    return svgFragment;
  }

  // Unsupported methods inherited from Element.

  @DomName('Element.insertAdjacentText')
  void insertAdjacentText(String where, String text) {
    throw new UnsupportedError("Cannot invoke insertAdjacentText on SVG.");
  }

  @DomName('Element.insertAdjacentHTML')
  void insertAdjacentHtml(String where, String text, {NodeValidator validator,
      NodeTreeSanitizer treeSanitizer}) {
    throw new UnsupportedError("Cannot invoke insertAdjacentHtml on SVG.");
  }

  @DomName('Element.insertAdjacentElement')
  Element insertAdjacentElement(String where, Element element) {
    throw new UnsupportedError("Cannot invoke insertAdjacentElement on SVG.");
  }

  HtmlCollection get _children {
    throw new UnsupportedError("Cannot get _children on SVG.");
  }

  bool get isContentEditable => false;
  void click() {
    throw new UnsupportedError("Cannot invoke click SVG.");
  }

  /**
   * Checks to see if the SVG element type is supported by the current platform.
   *
   * The tag should be a valid SVG element tag name.
   */
  static bool isTagSupported(String tag) {
    var e = new $CLASSNAME.tag(tag);
    return e is $CLASSNAME && !(e is UnknownElement);
  }

$if JSINTEROP
  set _svgClassName(AnimatedString value) =>
      _blink.BlinkSVGElement.instance.className_Setter_(this, value);

$endif
$!MEMBERS
}