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99 lines
4.0 KiB
C++
99 lines
4.0 KiB
C++
// Copyright 2008, Google Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// 3. Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file contains the declaration of the FeatureList class.
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#ifndef KML_CONVENIENCE_FEATURE_LIST_H__
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#define KML_CONVENIENCE_FEATURE_LIST_H__
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#include <list>
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#include "kml/dom.h"
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#include "kml/engine.h"
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namespace kmlconvenience {
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// This returns the value of the "Score" Data element as described above.
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// This uses GetExtendedDataValue().
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int GetFeatureScore(kmldom::FeaturePtr feature);
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// This sets the value of the "Score" data element as described above.
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// This uses SetExtendedDataValue().
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void SetFeatureScore(const string& score, kmldom::FeaturePtr feature);
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// STL list has constant time erase.
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typedef std::list<kmldom::FeaturePtr> feature_list_t;
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// This class provides an efficient data structure to gather, sort and
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// split Features by bounding box. Basic usage:
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// FeatureList feature_list;
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// for each feature:
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// SetFeatureScore(the_features_score, feature);
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// feature_list.PushBack(feature);
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// feature_list.Sort()
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// FeatureList features_in_some_bbox;
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// Bbox some_bbox;
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// feature_list.BboxSplit(bbox, how_many, &features_in_some_bbox);
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// FolderPtr folder;
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// features_in_some_bbox.Save(&folder);
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// folder->set_region(something-that-creates-a-Region-from-a-Bbox(some_bbox);
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class FeatureList {
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public:
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// Append the feature to the end of the list.
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void PushBack(const kmldom::FeaturePtr& feature);
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// Split up to max features which are within the bounding box out to the
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// given FeatureList. If a NULL FeatureList is supplied the features are
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// deleted from this FeatureList. NOTE: This is DESTRUCTIVE with respect
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// to this FeatureList.
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size_t BboxSplit(const kmlengine::Bbox& bbox, size_t max,
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FeatureList* output);
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// This calls BboxSplit based on a Bbox constructed from the LatLonAltBox
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// of the Region if it has one. NOTE: This is DESTRUCTIVE.
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size_t RegionSplit(const kmldom::RegionPtr& region, size_t max,
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FeatureList* output);
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// This sorts the features within this FeatureList based on score as set
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// in ExtendedData.
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void Sort();
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// This returns the number of features within the FeatureList.
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size_t Size() const;
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// This expands the bounds of the given Bbox to enclose all features in
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// this FeatureList.
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void ComputeBoundingBox(kmlengine::Bbox* bbox) const;
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// This appends all features to the given container. Order is preserved.
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size_t Save(kmldom::ContainerPtr container) const;
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private:
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feature_list_t feature_list_;
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};
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} // end namespace kmlconvenience
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#endif // KML_CONVENIENCE_FEATURE_LIST_H__
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