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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.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_NFC_NFC_PROXY_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_NFC_NFC_PROXY_H_
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/device/public/mojom/nfc.mojom-blink.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_receiver.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_wrapper_mode.h"
#include "third_party/blink/renderer/platform/supplementable.h"
#include "third_party/blink/renderer/platform/wtf/gc_plugin.h"
namespace blink {
class LocalDOMWindow;
class NDEFReader;
// This is a proxy class used by NDEFReader(s) to connect
// to implementation of device::mojom::blink::NFC interface.
class MODULES_EXPORT NFCProxy final : public GarbageCollected<NFCProxy>,
public Supplement<LocalDOMWindow>,
public device::mojom::blink::NFCClient {
public:
static const char kSupplementName[];
static NFCProxy* From(LocalDOMWindow&);
explicit NFCProxy(LocalDOMWindow&);
~NFCProxy() override;
void Trace(Visitor*) const override;
// There is no matching RemoveWriter() method because writers are
// automatically removed from the weak hash set when they are garbage
// collected.
void AddWriter(NDEFReader*);
void StartReading(NDEFReader*,
device::mojom::blink::NFC::WatchCallback);
void StopReading(NDEFReader*);
bool IsReading(const NDEFReader*);
void Push(device::mojom::blink::NDEFMessagePtr,
device::mojom::blink::NDEFWriteOptionsPtr,
device::mojom::blink::NFC::PushCallback);
void CancelPush();
void MakeReadOnly(device::mojom::blink::NFC::MakeReadOnlyCallback);
void CancelMakeReadOnly();
private:
// Implementation of device::mojom::blink::NFCClient.
void OnWatch(const Vector<uint32_t>&,
const String&,
device::mojom::blink::NDEFMessagePtr) override;
void OnError(device::mojom::blink::NDEFErrorPtr) override;
void OnReaderRegistered(NDEFReader*,
uint32_t watch_id,
device::mojom::blink::NFC::WatchCallback,
device::mojom::blink::NDEFErrorPtr);
void EnsureMojoConnection();
// This could only happen when the embedder does not implement NFC interface.
void OnMojoConnectionError();
// Identifies watch requests tied to a given Mojo connection of NFC interface,
// i.e. |nfc_|. Incremented each time a watch request is made.
uint32_t next_watch_id_ = 1;
// The <NDEFReader, WatchId> map keeps all readers that have started reading.
// The watch id comes from |next_watch_id_|.
using ReaderMap = HeapHashMap<WeakMember<NDEFReader>, uint32_t>;
ReaderMap readers_;
using WriterSet = HeapHashSet<WeakMember<NDEFReader>>;
WriterSet writers_;
HeapMojoRemote<device::mojom::blink::NFC> nfc_remote_;
HeapMojoReceiver<device::mojom::blink::NFCClient, NFCProxy> client_receiver_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_NFC_NFC_PROXY_H_
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