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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_EYE_DROPPER_EYE_DROPPER_VIEW_H_
#define COMPONENTS_EYE_DROPPER_EYE_DROPPER_VIEW_H_
#include <memory>
#include <optional>
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "content/public/browser/eye_dropper.h"
#include "content/public/browser/eye_dropper_listener.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/display/screen.h"
#include "ui/gfx/geometry/point.h"
#include "ui/views/widget/widget_delegate.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "base/scoped_observation.h"
#include "ui/aura/window_observer.h"
#endif
namespace eye_dropper {
// EyeDropperView is used on Aura platforms.
class EyeDropperView : public content::EyeDropper,
#if BUILDFLAG(IS_CHROMEOS)
public aura::WindowObserver,
#endif
public views::WidgetDelegateView {
METADATA_HEADER(EyeDropperView, views::WidgetDelegateView)
public:
EyeDropperView(gfx::NativeView parent,
gfx::NativeView event_handler,
content::EyeDropperListener* listener);
EyeDropperView(const EyeDropperView&) = delete;
EyeDropperView& operator=(const EyeDropperView&) = delete;
~EyeDropperView() override;
// Called regularly to notify what the current cursor position is. Cursor
// position may not have changed between calls.
void OnCursorPositionUpdate(gfx::Point cursor_position);
ui::EventHandler* GetEventHandlerForTesting() {
return pre_dispatch_handler_.get();
}
protected:
// views::WidgetDelegateView:
void OnPaint(gfx::Canvas* canvas) override;
void WindowClosing() override;
void OnWidgetMove() override;
#if BUILDFLAG(IS_CHROMEOS)
// aura::WindowObserver:
void OnWindowAddedToRootWindow(aura::Window* window) override;
void OnWindowDestroying(aura::Window* window) override;
#endif
private:
class ViewPositionHandler;
class ScreenCapturer;
class PreEventDispatchHandler : public ui::EventHandler {
public:
PreEventDispatchHandler(EyeDropperView* view,
gfx::NativeView event_handler);
PreEventDispatchHandler(const PreEventDispatchHandler&) = delete;
PreEventDispatchHandler& operator=(const PreEventDispatchHandler&) = delete;
~PreEventDispatchHandler() override;
private:
void OnMouseEvent(ui::MouseEvent* event) override;
void OnGestureEvent(ui::GestureEvent* event) override;
void OnTouchEvent(ui::TouchEvent* event) override;
raw_ptr<EyeDropperView> view_;
#if defined(USE_AURA)
class KeyboardHandler;
class FocusObserver;
std::unique_ptr<KeyboardHandler> keyboard_handler_;
std::unique_ptr<FocusObserver> focus_observer_;
gfx::Vector2d touch_offset_;
#endif
};
void CaptureScreen(std::optional<webrtc::DesktopCapturer::SourceId> screen);
void OnScreenCaptured();
// Moves the view to the specified position.
void UpdatePosition(gfx::Point position);
void CaptureInput();
void HideCursor();
void ShowCursor();
// Handles color selection and notifies the listener.
void OnColorSelected();
void OnColorSelectionCanceled();
gfx::Size GetSize() const;
float GetDiameter() const;
// Receives the color selection.
raw_ptr<content::EyeDropperListener> listener_;
std::unique_ptr<PreEventDispatchHandler> pre_dispatch_handler_;
std::unique_ptr<ViewPositionHandler> view_position_handler_;
std::unique_ptr<ScreenCapturer> screen_capturer_;
std::optional<SkColor> selected_color_;
base::TimeTicks ignore_selection_time_;
gfx::Point last_cursor_position_ =
display::Screen::GetScreen()->GetCursorScreenPoint();
#if BUILDFLAG(IS_CHROMEOS)
base::ScopedObservation<aura::Window, aura::WindowObserver>
window_observation_{this};
#endif
};
} // namespace eye_dropper
#endif // COMPONENTS_EYE_DROPPER_EYE_DROPPER_VIEW_H_
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