| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/exo/seat.h" |
| |
| #if defined(OS_CHROMEOS) |
| #include "ash/shell.h" |
| #endif // defined(OS_CHROMEOS) |
| |
| #include "base/auto_reset.h" |
| #include "base/barrier_closure.h" |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/i18n/icu_string_conversions.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/task/post_task.h" |
| #include "components/exo/data_source.h" |
| #include "components/exo/mime_utils.h" |
| #include "components/exo/seat_observer.h" |
| #include "components/exo/shell_surface_util.h" |
| #include "components/exo/surface.h" |
| #include "components/exo/wm_helper.h" |
| #include "services/data_decoder/public/cpp/decode_image.h" |
| #include "third_party/icu/source/common/unicode/ucnv.h" |
| #include "ui/aura/client/focus_client.h" |
| #include "ui/base/clipboard/clipboard_monitor.h" |
| #include "ui/events/event_utils.h" |
| #include "ui/events/platform/platform_event_source.h" |
| |
| namespace service_manager { |
| class Connector; |
| } // namespace service_manager |
| |
| namespace exo { |
| namespace { |
| |
| // The maximum number of different data types that we will write to the |
| // clipboard (plain text, RTF, HTML, image) |
| constexpr int kMaxClipboardDataTypes = 4; |
| |
| constexpr char kUTF16Unspecified[] = "UTF-16"; |
| constexpr char kUTF16LittleEndian[] = "UTF-16LE"; |
| constexpr char kUTF16BigEndian[] = "UTF-16BE"; |
| constexpr uint8_t kByteOrderMark[] = {0xFE, 0xFF}; |
| constexpr int kByteOrderMarkSize = sizeof(kByteOrderMark); |
| |
| Surface* GetEffectiveFocus(aura::Window* window) { |
| if (!window) |
| return nullptr; |
| Surface* const surface = Surface::AsSurface(window); |
| if (surface) |
| return surface; |
| // Fallback to main surface. |
| aura::Window* const top_level_window = window->GetToplevelWindow(); |
| if (!top_level_window) |
| return nullptr; |
| return GetShellMainSurface(top_level_window); |
| } |
| |
| base::string16 CodepageToUTF16(const std::vector<uint8_t>& data, |
| const std::string& charset_input) { |
| base::string16 output; |
| base::StringPiece piece(reinterpret_cast<const char*>(data.data()), |
| data.size()); |
| const char* charset = charset_input.c_str(); |
| |
| // Despite claims in the documentation to the contrary, the ICU UTF-16 |
| // converter does not automatically detect and interpret the byte order |
| // mark. Therefore, we must do this ourselves. |
| if (!ucnv_compareNames(charset, kUTF16Unspecified) && |
| data.size() >= kByteOrderMarkSize) { |
| if (static_cast<uint8_t>(piece.data()[0]) == kByteOrderMark[0] && |
| static_cast<uint8_t>(piece.data()[1]) == kByteOrderMark[1]) { |
| // BOM is in big endian format. Consume the BOM so it doesn't get |
| // interpreted as a character. |
| piece.remove_prefix(2); |
| charset = kUTF16BigEndian; |
| } else if (static_cast<uint8_t>(piece.data()[0]) == kByteOrderMark[1] && |
| static_cast<uint8_t>(piece.data()[1]) == kByteOrderMark[0]) { |
| // BOM is in little endian format. Consume the BOM so it doesn't get |
| // interpreted as a character. |
| piece.remove_prefix(2); |
| charset = kUTF16LittleEndian; |
| } |
| } |
| |
| base::CodepageToUTF16( |
| piece, charset, base::OnStringConversionError::Type::SUBSTITUTE, &output); |
| return output; |
| } |
| |
| } // namespace |
| |
| Seat::Seat() |
| : changing_clipboard_data_to_selection_source_(false), |
| weak_ptr_factory_(this) { |
| WMHelper::GetInstance()->AddFocusObserver(this); |
| // Prepend handler as it's critical that we see all events. |
| WMHelper::GetInstance()->PrependPreTargetHandler(this); |
| ui::ClipboardMonitor::GetInstance()->AddObserver(this); |
| // TODO(reveman): Need to handle the mus case where PlatformEventSource is |
| // null. https://crbug.com/856230 |
| if (ui::PlatformEventSource::GetInstance()) |
| ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this); |
| } |
| |
| Seat::~Seat() { |
| DCHECK(!selection_source_) << "DataSource must be released before Seat"; |
| WMHelper::GetInstance()->RemoveFocusObserver(this); |
| WMHelper::GetInstance()->RemovePreTargetHandler(this); |
| ui::ClipboardMonitor::GetInstance()->RemoveObserver(this); |
| if (ui::PlatformEventSource::GetInstance()) |
| ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this); |
| } |
| |
| void Seat::AddObserver(SeatObserver* observer) { |
| observers_.AddObserver(observer); |
| } |
| |
| void Seat::RemoveObserver(SeatObserver* observer) { |
| observers_.RemoveObserver(observer); |
| } |
| |
| Surface* Seat::GetFocusedSurface() { |
| return GetEffectiveFocus(WMHelper::GetInstance()->GetFocusedWindow()); |
| } |
| |
| void Seat::SetSelection(DataSource* source) { |
| if (!source) { |
| ui::Clipboard::GetForCurrentThread()->Clear(ui::ClipboardType::kCopyPaste); |
| // selection_source_ is Cancelled() and reset() in OnClipboardDataChanged(). |
| return; |
| } |
| |
| if (selection_source_) { |
| if (selection_source_->get() == source) |
| return; |
| selection_source_->get()->Cancelled(); |
| } |
| selection_source_ = std::make_unique<ScopedDataSource>(source, this); |
| scoped_refptr<RefCountedScopedClipboardWriter> writer = |
| base::MakeRefCounted<RefCountedScopedClipboardWriter>( |
| ui::ClipboardType::kCopyPaste); |
| |
| base::RepeatingClosure data_read_callback = base::BarrierClosure( |
| kMaxClipboardDataTypes, |
| base::BindOnce(&Seat::OnAllReadsFinished, weak_ptr_factory_.GetWeakPtr(), |
| writer)); |
| |
| source->GetDataForPreferredMimeTypes( |
| base::BindOnce(&Seat::OnTextRead, weak_ptr_factory_.GetWeakPtr(), writer, |
| data_read_callback), |
| base::BindOnce(&Seat::OnRTFRead, weak_ptr_factory_.GetWeakPtr(), writer, |
| data_read_callback), |
| base::BindOnce(&Seat::OnHTMLRead, weak_ptr_factory_.GetWeakPtr(), writer, |
| data_read_callback), |
| base::BindOnce(&Seat::OnImageRead, weak_ptr_factory_.GetWeakPtr(), writer, |
| data_read_callback), |
| data_read_callback); |
| } |
| |
| void Seat::OnTextRead(scoped_refptr<RefCountedScopedClipboardWriter> writer, |
| base::OnceClosure callback, |
| const std::string& mime_type, |
| const std::vector<uint8_t>& data) { |
| base::string16 output = CodepageToUTF16(data, GetCharset(mime_type)); |
| writer->WriteText(output); |
| std::move(callback).Run(); |
| } |
| |
| void Seat::OnRTFRead(scoped_refptr<RefCountedScopedClipboardWriter> writer, |
| base::OnceClosure callback, |
| const std::string& mime_type, |
| const std::vector<uint8_t>& data) { |
| writer->WriteRTF( |
| std::string(reinterpret_cast<const char*>(data.data()), data.size())); |
| std::move(callback).Run(); |
| } |
| |
| void Seat::OnHTMLRead(scoped_refptr<RefCountedScopedClipboardWriter> writer, |
| base::OnceClosure callback, |
| const std::string& mime_type, |
| const std::vector<uint8_t>& data) { |
| base::string16 output = CodepageToUTF16(data, GetCharset(mime_type)); |
| writer->WriteHTML(output, std::string()); |
| std::move(callback).Run(); |
| } |
| |
| void Seat::OnImageRead(scoped_refptr<RefCountedScopedClipboardWriter> writer, |
| base::OnceClosure callback, |
| const std::string& mime_type, |
| const std::vector<uint8_t>& data) { |
| #if defined(OS_CHROMEOS) |
| data_decoder::DecodeImage( |
| ash::Shell::Get()->connector(), data, |
| data_decoder::mojom::ImageCodec::DEFAULT, false, |
| std::numeric_limits<int64_t>::max(), gfx::Size(), |
| base::BindOnce(&Seat::OnImageDecoded, weak_ptr_factory_.GetWeakPtr(), |
| std::move(callback), writer)); |
| #else |
| std::move(callback).Run(); |
| #endif // defined(OS_CHROMEOS) |
| } |
| |
| #if defined(OS_CHROMEOS) |
| void Seat::OnImageDecoded(base::OnceClosure callback, |
| scoped_refptr<RefCountedScopedClipboardWriter> writer, |
| const SkBitmap& bitmap) { |
| if (!bitmap.isNull() && !bitmap.empty()) |
| writer->WriteImage(bitmap); |
| std::move(callback).Run(); |
| } |
| #endif // defined(OS_CHROMEOS) |
| |
| void Seat::OnAllReadsFinished( |
| scoped_refptr<RefCountedScopedClipboardWriter> writer) { |
| // We need to destroy the ScopedClipboardWriter in this call, before |
| // |auto_reset| is destroyed, so if there are outstanding references that |
| // would prevent that, reschedule this task. |
| if (!writer->HasOneRef()) { |
| base::ThreadTaskRunnerHandle::Get()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&Seat::OnAllReadsFinished, |
| weak_ptr_factory_.GetWeakPtr(), std::move(writer))); |
| return; |
| } |
| base::AutoReset<bool> auto_reset( |
| &changing_clipboard_data_to_selection_source_, true); |
| writer.reset(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // aura::client::FocusChangeObserver overrides: |
| |
| void Seat::OnWindowFocused(aura::Window* gained_focus, |
| aura::Window* lost_focus) { |
| Surface* const surface = GetEffectiveFocus(gained_focus); |
| for (auto& observer : observers_) { |
| observer.OnSurfaceFocusing(surface); |
| } |
| for (auto& observer : observers_) { |
| observer.OnSurfaceFocused(surface); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // ui::PlatformEventObserver overrides: |
| |
| void Seat::WillProcessEvent(const ui::PlatformEvent& event) { |
| switch (ui::EventTypeFromNative(event)) { |
| case ui::ET_KEY_PRESSED: |
| case ui::ET_KEY_RELEASED: |
| physical_code_for_currently_processing_event_ = ui::CodeFromNative(event); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| void Seat::DidProcessEvent(const ui::PlatformEvent& event) { |
| switch (ui::EventTypeFromNative(event)) { |
| case ui::ET_KEY_PRESSED: |
| physical_code_for_currently_processing_event_ = ui::DomCode::NONE; |
| break; |
| case ui::ET_KEY_RELEASED: |
| // Remove this from the pressed key map because when IME is active we can |
| // end up getting the DidProcessEvent call before we get the OnKeyEvent |
| // callback and then the key will end up being stuck pressed. |
| if (physical_code_for_currently_processing_event_ != ui::DomCode::NONE) { |
| pressed_keys_.erase(physical_code_for_currently_processing_event_); |
| physical_code_for_currently_processing_event_ = ui::DomCode::NONE; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // ui::EventHandler overrides: |
| |
| void Seat::OnKeyEvent(ui::KeyEvent* event) { |
| // Ignore synthetic key repeat events. |
| if (event->is_repeat()) |
| return; |
| if (physical_code_for_currently_processing_event_ != ui::DomCode::NONE) { |
| switch (event->type()) { |
| case ui::ET_KEY_PRESSED: |
| pressed_keys_.insert( |
| {physical_code_for_currently_processing_event_, event->code()}); |
| break; |
| case ui::ET_KEY_RELEASED: |
| pressed_keys_.erase(physical_code_for_currently_processing_event_); |
| break; |
| default: |
| NOTREACHED(); |
| break; |
| } |
| } |
| modifier_flags_ = event->flags(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // ui::ClipboardObserver overrides: |
| |
| void Seat::OnClipboardDataChanged() { |
| if (!selection_source_ || changing_clipboard_data_to_selection_source_) |
| return; |
| selection_source_->get()->Cancelled(); |
| selection_source_.reset(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // DataSourceObserver overrides: |
| |
| void Seat::OnDataSourceDestroying(DataSource* source) { |
| if (selection_source_ && selection_source_->get() == source) |
| selection_source_.reset(); |
| } |
| |
| } // namespace exo |