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content / browser / media / capture / mouse_cursor_overlay_controller_aura.cc [blame]
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <optional>
#include "base/memory/raw_ptr.h"
#include "content/browser/media/capture/mouse_cursor_overlay_controller.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/aura/client/cursor_shape_client.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/events/event.h"
#include "ui/events/event_handler.h"
#include "ui/gfx/geometry/point.h"
#include "ui/wm/public/activation_client.h"
namespace content {
class MouseCursorOverlayController::Observer final
: public ui::EventHandler,
public aura::WindowObserver {
public:
explicit Observer(MouseCursorOverlayController* controller,
aura::Window* window)
: controller_(controller), window_(window) {
DCHECK(controller_);
DCHECK(window_);
controller_->OnMouseHasGoneIdle();
window_->AddObserver(this);
window_->AddPreTargetHandler(this);
}
Observer(const Observer&) = delete;
Observer& operator=(const Observer&) = delete;
~Observer() final {
if (window_) {
OnWindowDestroying(window_);
}
}
void StopTracking() {
if (window_) {
window_->RemovePreTargetHandler(this);
controller_->OnMouseHasGoneIdle();
}
}
static aura::Window* GetTargetWindow(
const std::unique_ptr<Observer>& observer) {
if (observer) {
return observer->window_;
}
return nullptr;
}
private:
bool IsWindowActive() const {
if (window_) {
if (auto* root_window = window_->GetRootWindow()) {
if (window_ == root_window) {
return true;
}
if (auto* client = wm::GetActivationClient(root_window)) {
if (auto* active_window = client->GetActiveWindow()) {
return active_window->Contains(window_);
}
}
}
}
return false;
}
gfx::PointF AsLocationInWindow(const ui::Event& event) const {
gfx::PointF location = event.AsLocatedEvent()->location_f();
if (event.target() != window_) {
aura::Window::ConvertPointToTarget(
static_cast<aura::Window*>(event.target()), window_, &location);
}
return location;
}
gfx::Point CoordinatesForMouseEvent(const ui::Event& event) const {
if (!IsWindowActive() || event.type() == ui::EventType::kMouseExited) {
return kOutsideSurface;
}
gfx::PointF location = AsLocationInWindow(event);
int x = std::round(location.x());
int y = std::round(location.y());
// When performing a drag on some platforms, it's possible to
// trigger mouse events with coordinates outside the surface, so
// make sure we don't transmit such coordinates.
const gfx::Size& window_size = window_->bounds().size();
if (x < 0 || y < 0 || x >= window_size.width() ||
y >= window_size.height()) {
return kOutsideSurface;
}
return gfx::Point(x, y);
}
// ui::EventHandler overrides.
void OnEvent(ui::Event* event) final {
switch (event->type()) {
case ui::EventType::kMouseDragged:
case ui::EventType::kMouseMoved:
case ui::EventType::kMouseEntered:
case ui::EventType::kMouseExited:
case ui::EventType::kTouchMoved:
if (IsWindowActive()) {
controller_->OnMouseMoved(AsLocationInWindow(*event));
}
if (controller_->ShouldSendMouseEvents()) {
controller_->OnMouseCoordinatesUpdated(
CoordinatesForMouseEvent(*event));
}
break;
case ui::EventType::kMousePressed:
case ui::EventType::kMouseReleased:
case ui::EventType::kMousewheel:
case ui::EventType::kTouchPressed:
case ui::EventType::kTouchReleased: {
controller_->OnMouseClicked(AsLocationInWindow(*event));
break;
}
default:
return;
}
}
// aura::WindowObserver overrides.
void OnWindowDestroying(aura::Window* window) final {
DCHECK_EQ(window_, window);
StopTracking();
window_->RemoveObserver(this);
window_ = nullptr;
}
const raw_ptr<MouseCursorOverlayController> controller_;
raw_ptr<aura::Window> window_;
};
MouseCursorOverlayController::MouseCursorOverlayController()
// base::Unretained(this) is safe because we own mouse_activity_ended_timer_
// and its destructor calls TimerBase::AbandonScheduledTask().
: mouse_activity_ended_timer_(
FROM_HERE,
kIdleTimeout,
base::BindRepeating(&MouseCursorOverlayController::OnMouseHasGoneIdle,
base::Unretained(this))),
mouse_move_behavior_atomic_(kNotMoving) {
// MouseCursorOverlayController can be constructed on any thread, but
// thereafter must be used according to class-level comments.
DETACH_FROM_SEQUENCE(ui_sequence_checker_);
}
MouseCursorOverlayController::~MouseCursorOverlayController() {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
observer_.reset();
Stop();
}
void MouseCursorOverlayController::SetTargetView(aura::Window* window) {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
observer_.reset();
if (window) {
observer_ = std::make_unique<Observer>(this, window);
}
}
gfx::NativeCursor MouseCursorOverlayController::GetCurrentCursorOrDefault()
const {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
if (auto* window = Observer::GetTargetWindow(observer_)) {
if (auto* host = window->GetHost()) {
gfx::NativeCursor cursor = host->last_cursor();
if (cursor != ui::mojom::CursorType::kNull)
return cursor;
}
}
return ui::mojom::CursorType::kPointer;
}
gfx::RectF MouseCursorOverlayController::ComputeRelativeBoundsForOverlay(
const gfx::NativeCursor& cursor,
const gfx::PointF& location) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
auto* window = Observer::GetTargetWindow(observer_);
if (!window)
return gfx::RectF();
const gfx::Size& window_size = window->bounds().size();
std::optional<ui::CursorData> cursor_data =
aura::client::GetCursorShapeClient().GetCursorData(cursor);
if (window_size.IsEmpty() || !window->GetRootWindow() || !cursor_data)
return gfx::RectF();
const SkBitmap& bitmap = cursor_data->bitmaps[0];
const float scale_factor = cursor_data->scale_factor;
// Compute the cursor size in terms of DIP coordinates.
const gfx::SizeF size = gfx::ScaleSize(
gfx::SizeF(bitmap.width(), bitmap.height()), 1.0f / scale_factor);
// Compute the hotspot in terms of DIP coordinates.
const gfx::PointF hotspot =
gfx::ScalePoint(gfx::PointF(cursor_data->hotspot), 1.0f / scale_factor);
// Finally, put it all together: Scale the absolute bounds of the
// overlay by the window size to produce relative coordinates.
return gfx::ScaleRect(gfx::RectF(location - hotspot.OffsetFromOrigin(), size),
1.0f / window_size.width(),
1.0f / window_size.height());
}
void MouseCursorOverlayController::DisconnectFromToolkitForTesting() {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
observer_->StopTracking();
// Note: Not overriding the mouse cursor since the default is already
// ui::mojom::CursorType::kPointer, which provides the tests a bitmap they can
// work with.
}
// static
SkBitmap MouseCursorOverlayController::GetCursorImage(
const gfx::NativeCursor& cursor) {
std::optional<ui::CursorData> cursor_data =
aura::client::GetCursorShapeClient().GetCursorData(cursor);
if (!cursor_data)
return SkBitmap();
return cursor_data->bitmaps[0];
}
} // namespace content