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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webaudio/audio_param_map.h"
namespace blink {
class AudioParamMapIterationSource final
: public PairIterable<String, AudioParam*>::IterationSource {
public:
AudioParamMapIterationSource(
const HeapHashMap<String, Member<AudioParam>>& map) {
for (const auto& name : map.Keys()) {
parameter_names_.push_back(name);
parameter_objects_.push_back(map.at(name));
}
}
bool Next(ScriptState* scrip_state,
String& key,
AudioParam*& audio_param,
ExceptionState&) override {
if (current_index_ == parameter_names_.size())
return false;
key = parameter_names_[current_index_];
audio_param = parameter_objects_[current_index_];
++current_index_;
return true;
}
void Trace(Visitor* visitor) const override {
visitor->Trace(parameter_objects_);
PairIterable<String, AudioParam*>::IterationSource::Trace(visitor);
}
private:
// For sequential iteration (e.g. Next()).
Vector<String> parameter_names_;
HeapVector<Member<AudioParam>> parameter_objects_;
unsigned current_index_;
};
AudioParamMap::AudioParamMap(
const HeapHashMap<String, Member<AudioParam>>& parameter_map)
: parameter_map_(parameter_map) {}
PairIterable<String, AudioParam*>::IterationSource*
AudioParamMap::StartIteration(ScriptState*, ExceptionState&) {
return MakeGarbageCollected<AudioParamMapIterationSource>(parameter_map_);
}
bool AudioParamMap::GetMapEntry(ScriptState*,
const String& key,
AudioParam*& audio_param,
ExceptionState&) {
if (parameter_map_.Contains(key)) {
audio_param = parameter_map_.at(key);
return true;
}
return false;
}
} // namespace blink
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