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#pragma once
#include <Widgets/Rect.h>
#include <Widgets/Color.h>
#include <Widgets/Painter.h>
#include <AK/HashTable.h>
#include <AK/InlineLinkedList.h>
#include <AK/WeakPtr.h>
#include <AK/Lock.h>
#include "WSEventReceiver.h"
class WSScreen;
class MouseEvent;
class PaintEvent;
class WSWindow;
class CharacterBitmap;
class GraphicsBitmap;
class WSWindowManager : public WSEventReceiver {
public:
static WSWindowManager& the();
void add_window(WSWindow&);
void remove_window(WSWindow&);
void notify_title_changed(WSWindow&);
void notify_rect_changed(WSWindow&, const Rect& oldRect, const Rect& newRect);
WSWindow* activeWindow() { return m_active_window.ptr(); }
void move_to_front(WSWindow&);
static void initialize();
void draw_cursor();
void invalidate(const WSWindow&);
void invalidate(const WSWindow&, const Rect&);
void invalidate(const Rect&);
void invalidate();
void flush(const Rect&);
private:
WSWindowManager();
virtual ~WSWindowManager() override;
void process_mouse_event(MouseEvent&);
void handle_titlebar_mouse_event(WSWindow&, MouseEvent&);
void set_active_window(WSWindow*);
virtual void event(WSEvent&) override;
void compose();
void paint_window_frame(WSWindow&);
WSScreen& m_screen;
Rect m_screen_rect;
Color m_active_window_border_color;
Color m_active_window_title_color;
Color m_inactive_window_border_color;
Color m_inactive_window_title_color;
HashTable<WSWindow*> m_windows;
InlineLinkedList<WSWindow> m_windows_in_order;
WeakPtr<WSWindow> m_active_window;
WeakPtr<WSWindow> m_dragWindow;
Point m_drag_origin;
Point m_drag_window_origin;
Rect m_last_drag_rect;
Rect m_drag_start_rect;
Rect m_drag_end_rect;
Rect m_last_cursor_rect;
unsigned m_recompose_count { 0 };
unsigned m_flush_count { 0 };
RetainPtr<GraphicsBitmap> m_front_bitmap;
RetainPtr<GraphicsBitmap> m_back_bitmap;
Vector<Rect> m_invalidated_rects;
bool m_pending_compose_event { false };
RetainPtr<CharacterBitmap> m_cursor_bitmap_inner;
RetainPtr<CharacterBitmap> m_cursor_bitmap_outer;
OwnPtr<Painter> m_back_painter;
OwnPtr<Painter> m_front_painter;
mutable Lock m_lock;
bool m_flash_flush { false };
};
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