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// Copyright 2017 The Chromium Authors
// 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 PairSyncIterable<AudioParamMap>::IterationSource {
public:
explicit AudioParamMapIterationSource(
const HeapHashMap<String, Member<AudioParam>>& map) {
parameter_names_.ReserveInitialCapacity(map.size());
parameter_objects_.ReserveInitialCapacity(map.size());
for (const auto& item : map) {
parameter_names_.push_back(item.key);
parameter_objects_.push_back(item.value);
}
}
bool FetchNextItem(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_);
PairSyncIterable<AudioParamMap>::IterationSource::Trace(visitor);
}
private:
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) {}
PairSyncIterable<AudioParamMap>::IterationSource*
AudioParamMap::CreateIterationSource(ScriptState*, ExceptionState&) {
return MakeGarbageCollected<AudioParamMapIterationSource>(parameter_map_);
}
bool AudioParamMap::GetMapEntry(ScriptState*,
const String& key,
AudioParam*& value,
ExceptionState&) {
auto it = parameter_map_.find(key);
if (it == parameter_map_.end())
return false;
value = it->value;
return true;
}
} // namespace blink
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