/usr/include/kml/engine/shared_style_parser_observer.h is in libkml-dev 1.3.0-5.
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//
// 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 definition of the SharedStyleParserObserver class.
#ifndef KML_ENGINE_SHARED_STYLE_PARSER_OBSERVER_H__
#define KML_ENGINE_SHARED_STYLE_PARSER_OBSERVER_H__
#include <map>
#include <string>
#include "kml/dom.h"
#include "kml/dom/parser_observer.h"
#include "kml/engine/engine_types.h"
namespace kmlengine {
// The SharedStyleParserObserver is a kmldom::ParserObserver which gathers all
// all shared StyleSelectors into the supplied SharedStyleMap. If strict_parse
// is true AddChild() returns false on any id collision causing the parse to
// terminate when this is used with kmldom::Parse::AddObserver(). If
// strict_parse is false the "last one wins" on any duplicate.
// TODO: provide an error log for this latter case.
class SharedStyleParserObserver : public kmldom::ParserObserver {
public:
// A SharedStyleMap must be supplied.
SharedStyleParserObserver(SharedStyleMap* shared_style_map,
bool strict_parse)
: shared_style_map_(shared_style_map),
strict_parse_(strict_parse) {}
virtual ~SharedStyleParserObserver() {}
// ParserObserver::AddChild()
virtual bool AddChild(const kmldom::ElementPtr& parent,
const kmldom::ElementPtr& child) {
// A shared style is defined to be a StyleSelector with an id that is
// a child of a Document. If this id already has a mapping return false
// to terminate the parse.
if (kmldom::DocumentPtr document = kmldom::AsDocument(parent)) {
if (kmldom::StyleSelectorPtr ss = kmldom::AsStyleSelector(child)) {
if (ss->has_id()) {
if (strict_parse_ && shared_style_map_->find(ss->get_id()) !=
shared_style_map_->end()) {
// TODO: provide means to send back an and error string with id
return false; // Duplicate id, fail parse.
}
}
// No such mapping so save it, and "last one wins" on non-strict parse.
(*shared_style_map_)[ss->get_id()] = ss;
}
}
return true; // Not a duplicate id, keep parsing.
}
private:
SharedStyleMap* shared_style_map_;
bool strict_parse_;
};
} // end namespace kmlengine
#endif // KML_ENGINE_SHARED_STYLE_PARSER_OBSERVER_H__
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