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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MOJO_STRING16_MOJOM_TRAITS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MOJO_STRING16_MOJOM_TRAITS_H_
#include <string>
#include "base/containers/span.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "mojo/public/cpp/bindings/struct_traits.h"
#include "mojo/public/mojom/base/string16.mojom-blink.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace mojo_base {
class BigBuffer;
}
namespace mojo {
// WTF::String stores string data as 8-bit strings if only Latin-1 characters
// are present. During Mojo serialization, this helper provides a scratch buffer
// that can be used for converting an 8-bit string to a 16-bit string.
class PLATFORM_EXPORT MaybeOwnedString16 {
public:
explicit MaybeOwnedString16(std::u16string owned_storage);
explicit MaybeOwnedString16(base::span<const uint16_t> unowned);
~MaybeOwnedString16();
const uint16_t* data() const { return unowned_.data(); }
size_t size() const { return unowned_.size(); }
private:
std::u16string owned_storage_;
// TODO(367764863) Rewrite to base::raw_span
RAW_PTR_EXCLUSION base::span<const uint16_t> unowned_;
};
template <>
struct PLATFORM_EXPORT ArrayTraits<MaybeOwnedString16> {
using Element = const uint16_t;
static bool IsNull(const MaybeOwnedString16&) { return false; }
static size_t GetSize(const MaybeOwnedString16& input) {
return input.size();
}
static const Element* GetData(const MaybeOwnedString16& input) {
return input.data();
}
static const Element& GetAt(const MaybeOwnedString16& input, size_t index) {
return input.data()[index];
}
};
template <>
struct PLATFORM_EXPORT
StructTraits<mojo_base::mojom::String16DataView, WTF::String> {
static bool IsNull(const WTF::String& input) { return input.IsNull(); }
static void SetToNull(WTF::String* output) { *output = WTF::String(); }
static MaybeOwnedString16 data(const WTF::String& input);
static bool Read(mojo_base::mojom::String16DataView, WTF::String* out);
};
template <>
struct PLATFORM_EXPORT
StructTraits<mojo_base::mojom::BigString16DataView, 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);
static bool Read(mojo_base::mojom::BigString16DataView, WTF::String* out);
};
} // namespace mojo
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MOJO_STRING16_MOJOM_TRAITS_H_
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