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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/chromeos/clipboard_aura.h"
#include <utility>
#include "base/memory/ptr_util.h"
#include "base/strings/utf_string_conversions.h"
#include "remoting/base/constants.h"
#include "remoting/proto/event.pb.h"
#include "remoting/protocol/clipboard_stub.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/clipboard/scoped_clipboard_writer.h"
#include "ui/base/data_transfer_policy/data_transfer_endpoint.h"
namespace {
// Clipboard polling interval in milliseconds.
const int64_t kClipboardPollingIntervalMs = 500;
} // namespace
namespace remoting {
ClipboardAura::ClipboardAura()
: polling_interval_(base::Milliseconds(kClipboardPollingIntervalMs)) {}
ClipboardAura::~ClipboardAura() {
DCHECK(thread_checker_.CalledOnValidThread());
}
void ClipboardAura::Start(
std::unique_ptr<protocol::ClipboardStub> client_clipboard) {
DCHECK(thread_checker_.CalledOnValidThread());
client_clipboard_ = std::move(client_clipboard);
// Aura doesn't provide a clipboard-changed notification. The only way to
// detect clipboard changes is by polling.
clipboard_polling_timer_.Start(FROM_HERE, polling_interval_, this,
&ClipboardAura::CheckClipboardForChanges);
}
void ClipboardAura::InjectClipboardEvent(
const protocol::ClipboardEvent& event) {
DCHECK(thread_checker_.CalledOnValidThread());
// Currently we only handle UTF-8 text.
if (event.mime_type().compare(kMimeTypeTextUtf8) != 0) {
return;
}
ui::ScopedClipboardWriter clipboard_writer(ui::ClipboardBuffer::kCopyPaste);
clipboard_writer.WriteText(base::UTF8ToUTF16(event.data()));
// Update local change-token to prevent this change from being picked up by
// CheckClipboardForChanges.
current_change_token_ = ui::ClipboardSequenceNumberToken();
}
void ClipboardAura::SetPollingIntervalForTesting(
base::TimeDelta polling_interval) {
DCHECK(thread_checker_.CalledOnValidThread());
polling_interval_ = polling_interval;
}
void ClipboardAura::CheckClipboardForChanges() {
DCHECK(thread_checker_.CalledOnValidThread());
ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
ui::ClipboardSequenceNumberToken change_token =
clipboard->GetSequenceNumber(ui::ClipboardBuffer::kCopyPaste);
if (change_token == current_change_token_) {
return;
}
current_change_token_ = change_token;
protocol::ClipboardEvent event;
std::string data;
ui::DataTransferEndpoint data_dst = ui::DataTransferEndpoint(
ui::EndpointType::kDefault, {.notify_if_restricted = false});
clipboard->ReadAsciiText(ui::ClipboardBuffer::kCopyPaste, &data_dst, &data);
event.set_mime_type(kMimeTypeTextUtf8);
event.set_data(data);
client_clipboard_->InjectClipboardEvent(event);
}
std::unique_ptr<Clipboard> Clipboard::Create() {
return base::WrapUnique(new ClipboardAura());
}
} // namespace remoting
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