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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MOJO_BIG_STRING_MOJOM_TRAITS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MOJO_BIG_STRING_MOJOM_TRAITS_H_
#include "mojo/public/cpp/base/big_buffer.h"
#include "mojo/public/cpp/bindings/struct_traits.h"
#include "mojo/public/mojom/base/big_string.mojom-blink-forward.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/text/string_utf8_adaptor.h"
namespace mojo {
template <>
struct PLATFORM_EXPORT
StructTraits<mojo_base::mojom::BigStringDataView, WTF::String> {
static bool IsNull(const WTF::String& input) { return input.IsNull(); }
static void SetToNull(WTF::String* output) { *output = WTF::String(); }
static mojo_base::BigBuffer data(const WTF::String& input) {
WTF::StringUTF8Adaptor adaptor(input);
return mojo_base::BigBuffer(base::as_byte_span(adaptor));
}
static bool Read(mojo_base::mojom::BigStringDataView data, WTF::String* out) {
mojo_base::BigBuffer buffer;
if (!data.ReadData(&buffer)) {
return false;
}
// An empty |mojo_base::BigBuffer| may have a null |data()| if empty.
if (!buffer.size()) {
*out = g_empty_string;
} else {
*out = WTF::String::FromUTF8(base::span(buffer));
}
return true;
}
};
} // namespace mojo
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MOJO_BIG_STRING_MOJOM_TRAITS_H_
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