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// Copyright 2008, Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, 
//     this list of conditions and the following disclaimer.
//  2. 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.
//  3. Neither the name of Google Inc. 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 AUTHOR ``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 THE AUTHOR 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.

// This file contains the declaration of the CreateResolvedStyle() function.

#ifndef KML_ENGINE_STYLE_RESOLVER_H__
#define KML_ENGINE_STYLE_RESOLVER_H__

#include "kml/dom.h"
#include "kml/engine/kml_cache.h"
#include "kml/engine/kml_file.h"

namespace kmlengine {

// This creates a new <Style> representing the merge of the inline and/or
// shared StyleSelector(s) of the given Feature within the given KmlFile for
// the given style state (<key>).  All SubStyle simple and complex children
// set in inline/shared StyleSelectors are also set in the created Style.
// This folows an internal maximum number of nested styleUrls.
kmldom::StylePtr CreateResolvedStyle(const kmldom::FeaturePtr& feature,
                                     const KmlFilePtr& kml_file,
                                     kmldom::StyleStateEnum style_state);

// This class provides the full set of style resolution possibilities.
class StyleResolver {
 public:
  // This creates a <Style> representing the fully resolved style of the
  // given state.  The styleurl and styleselector are typically those from
  // Feature or Pair and the SharedStyleMap, base_url and KmlCache are
  // typically from a KmlFile.  This method is well behaved with any or all
  // arguments NULL or empty.
  static kmldom::StylePtr CreateResolvedStyle(
      const string& styleurl,
      const kmldom::StyleSelectorPtr& styleselector,
      const SharedStyleMap& shared_style_map,
      const string& base_url,
      KmlCache* kml_cache,
      kmldom::StyleStateEnum style_state); 

  // This method resolves the style selector for the given styleurl assuming
  // it references a style selector in the given SharedStyleMap.  The resulting
  // StyleSelector has all id= attributes cleared.
  static kmldom::StyleSelectorPtr CreateResolvedStyleSelector(
      const string& styleurl, const SharedStyleMap& shared_style_map);
};

}  // end namespace kmlengine

#endif  // KML_ENGINE_STYLE_RESOLVER_H__