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// This file contains the declaration of the GetLinkParents() function and the
// definition of the GetLinkParentsParserObserver.

#ifndef KML_ENGINE_GET_LINK_PARENTS_H__
#define KML_ENGINE_GET_LINK_PARENTS_H__

#include <vector>
#include "kml/dom.h"
#include "kml/engine/engine_types.h"

namespace kmlengine {

// Is this element the parent of a Link?
bool IsLinkParent(const kmldom::ElementPtr& element);

// Is this element the parent of an Icon?
bool IsIconParent(const kmldom::ElementPtr& element);

// This ParserObserver looks for all elements that have a link child.
class GetLinkParentsParserObserver : public kmldom::ParserObserver {
 public:
  GetLinkParentsParserObserver(ElementVector* link_parent_vector)
      : link_parent_vector_(link_parent_vector) {}

  virtual ~GetLinkParentsParserObserver() {}

  virtual bool NewElement(const kmldom::ElementPtr& element) {
    if (IsLinkParent(element) || IsIconParent(element)) {
      link_parent_vector_->push_back(element);
    }
    return true;
  }

 private:
  ElementVector* link_parent_vector_;
};

// This function appends all Elements with link children to the supplied
// vector.  This returns false if a NULL vector pointer is supplied or if the
// parse of the kml fails.  See the IsLinkParent() and IsIconParent()
// functions for the definition of "Element with link child".
bool GetLinkParents(const string& kml, ElementVector* link_parent_vector);

}  // end namespace kmlengine

#endif  // KML_ENGINE_GET_LINK_PARENTS_H__