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// Copyright 2019 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/compression/compression_stream.h"
#include "base/metrics/histogram_macros.h"
#include "third_party/blink/renderer/modules/compression/compression_format.h"
#include "third_party/blink/renderer/modules/compression/deflate_transformer.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
namespace blink {
CompressionStream* CompressionStream::Create(ScriptState* script_state,
const AtomicString& format,
ExceptionState& exception_state) {
return MakeGarbageCollected<CompressionStream>(script_state, format,
exception_state);
}
ReadableStream* CompressionStream::readable() const {
return transform_->Readable();
}
WritableStream* CompressionStream::writable() const {
return transform_->Writable();
}
void CompressionStream::Trace(Visitor* visitor) const {
visitor->Trace(transform_);
ScriptWrappable::Trace(visitor);
}
CompressionStream::CompressionStream(ScriptState* script_state,
const AtomicString& format,
ExceptionState& exception_state) {
CompressionFormat deflate_format =
LookupCompressionFormat(format, exception_state);
if (exception_state.HadException())
return;
UMA_HISTOGRAM_ENUMERATION("Blink.Compression.CompressionStream.Format",
deflate_format);
// default level is hardcoded for now.
// TODO(arenevier): Make level configurable
const int deflate_level = 6;
transform_ =
TransformStream::Create(script_state,
MakeGarbageCollected<DeflateTransformer>(
script_state, deflate_format, deflate_level),
exception_state);
}
} // namespace blink
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