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