// 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 svg;

final _START_TAG_REGEXP = new RegExp('<(\\w+)');

class _SvgElementFactoryProvider {
  static SvgElement createSvgElement_tag(String tag) {
    final Element temp =
      document.$dom_createElementNS("http://www.w3.org/2000/svg", tag);
    return temp;
  }

  static SvgElement createSvgElement_svg(String svg) {
    Element parentTag;
    final match = _START_TAG_REGEXP.firstMatch(svg);
    if (match != null && match.group(1).toLowerCase() == 'svg') {
      parentTag = new Element.tag('div');
    } else {
      parentTag = new SvgSvgElement();
    }

    parentTag.innerHtml = svg;
    if (parentTag.children.length == 1) return parentTag.children.removeLast();

    throw new ArgumentError(
        'SVG had ${parentTag.children.length} '
        'top-level children but 1 expected');
  }
}

class _SvgSvgElementFactoryProvider {
  static SvgSvgElement createSvgSvgElement() {
    final el = new SvgElement.tag("svg");
    // The SVG spec requires the version attribute to match the spec version
    el.attributes['version'] = "1.1";
    return el;
  }
}