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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/mouse_cursor_monitor_aura.h"
#include <optional>
#include <utility>
#include "ash/shell.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "remoting/host/chromeos/skia_bitmap_desktop_frame.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/webrtc/modules/desktop_capture/mouse_cursor.h"
#include "ui/aura/client/cursor_shape_client.h"
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/base/cursor/cursor.h"
#include "ui/base/cursor/mojom/cursor_type.mojom-shared.h"
#include "ui/gfx/geometry/point.h"
namespace {
// Creates an empty webrtc::MouseCursor. The caller is responsible for
// destroying the returned cursor.
webrtc::MouseCursor* CreateEmptyMouseCursor() {
return new webrtc::MouseCursor(
new webrtc::BasicDesktopFrame(webrtc::DesktopSize(0, 0)),
webrtc::DesktopVector(0, 0));
}
} // namespace
namespace remoting {
MouseCursorMonitorAura::MouseCursorMonitorAura()
: callback_(nullptr), mode_(SHAPE_AND_POSITION) {}
void MouseCursorMonitorAura::Init(Callback* callback, Mode mode) {
DCHECK(!callback_);
DCHECK(callback);
callback_ = callback;
mode_ = mode;
}
void MouseCursorMonitorAura::Capture() {
// Check if the cursor is different.
gfx::NativeCursor cursor =
ash::Shell::GetPrimaryRootWindow()->GetHost()->last_cursor();
if (cursor != last_cursor_) {
last_cursor_ = cursor;
NotifyCursorChanged(cursor);
}
// Check if we need to update the location.
if (mode_ == SHAPE_AND_POSITION) {
gfx::Point position = aura::Env::GetInstance()->last_mouse_location();
if (position != last_mouse_location_) {
last_mouse_location_ = position;
callback_->OnMouseCursorPosition(
webrtc::DesktopVector(position.x(), position.y()));
}
}
}
void MouseCursorMonitorAura::NotifyCursorChanged(const ui::Cursor& cursor) {
if (cursor.type() == ui::mojom::CursorType::kNone) {
callback_->OnMouseCursor(CreateEmptyMouseCursor());
return;
}
std::optional<ui::CursorData> cursor_data =
aura::client::GetCursorShapeClient().GetCursorData(cursor);
if (!cursor_data) {
LOG(ERROR) << "Failed to load bitmap for cursor type: " << cursor.type();
return;
}
const SkBitmap& cursor_bitmap = cursor_data->bitmaps[0];
if (cursor_bitmap.drawsNothing()) {
callback_->OnMouseCursor(CreateEmptyMouseCursor());
return;
}
const gfx::Point& cursor_hotspot = cursor_data->hotspot;
std::unique_ptr<webrtc::DesktopFrame> image(SkiaBitmapDesktopFrame::Create(
std::make_unique<SkBitmap>(cursor_bitmap)));
std::unique_ptr<webrtc::MouseCursor> cursor_shape(new webrtc::MouseCursor(
image.release(),
webrtc::DesktopVector(cursor_hotspot.x(), cursor_hotspot.y())));
callback_->OnMouseCursor(cursor_shape.release());
}
} // namespace remoting
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