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#pragma once
#include <SharedGraphics/Rect.h>
#include <SharedGraphics/Color.h>
#include <SharedGraphics/Painter.h>
#include <SharedGraphics/DisjointRectSet.h>
#include <AK/HashTable.h>
#include <AK/InlineLinkedList.h>
#include <AK/WeakPtr.h>
#include <AK/HashMap.h>
#include "WSMessageReceiver.h"
#include "WSMenuBar.h"
#include <WindowServer/WSWindowType.h>
#include <AK/CircularQueue.h>
class WSAPIClientRequest;
class WSScreen;
class WSMenuBar;
class WSMouseEvent;
class WSClientWantsToPaintMessage;
class WSWindow;
class WSClientConnection;
class CharacterBitmap;
class GraphicsBitmap;
enum class IterationDecision { Continue, Abort };
enum class ResizeDirection { None, Left, UpLeft, Up, UpRight, Right, DownRight, Down, DownLeft };
class WSWindowManager : public WSMessageReceiver {
public:
static WSWindowManager& the();
WSWindowManager();
virtual ~WSWindowManager() override;
void add_window(WSWindow&);
void remove_window(WSWindow&);
void notify_title_changed(WSWindow&);
void notify_rect_changed(WSWindow&, const Rect& oldRect, const Rect& newRect);
void notify_client_changed_app_menubar(WSClientConnection&);
WSWindow* active_window() { return m_active_window.ptr(); }
const WSClientConnection* active_client() const;
void move_to_front(WSWindow&);
void invalidate_cursor();
void draw_cursor();
void draw_menubar();
Rect menubar_rect() const;
WSMenuBar* current_menubar() { return m_current_menubar.ptr(); }
void set_current_menubar(WSMenuBar*);
WSMenu* current_menu() { return m_current_menu.ptr(); }
void set_current_menu(WSMenu*);
void invalidate(const WSWindow&);
void invalidate(const WSWindow&, const Rect&);
void invalidate(const Rect&, bool should_schedule_compose_event = true);
void invalidate();
void recompose_immediately();
void flush(const Rect&);
Font& font() { return *m_font; }
const Font& font() const { return *m_font; }
void close_menu(WSMenu&);
void close_menubar(WSMenuBar&);
Color menu_selection_color() const { return m_menu_selection_color; }
int menubar_menu_margin() const;
void set_resolution(int width, int height);
private:
void process_mouse_event(WSMouseEvent&, WSWindow*& event_window);
void handle_menu_mouse_event(WSMenu&, WSMouseEvent&);
void handle_menubar_mouse_event(WSMouseEvent&);
void handle_close_button_mouse_event(WSWindow&, WSMouseEvent&);
void start_window_resize(WSWindow&, WSMouseEvent&);
void start_window_drag(WSWindow&, WSMouseEvent&);
void handle_client_request(WSAPIClientRequest&);
void set_active_window(WSWindow*);
void set_hovered_window(WSWindow*);
template<typename Callback> IterationDecision for_each_visible_window_of_type_from_back_to_front(WSWindowType, Callback);
template<typename Callback> IterationDecision for_each_visible_window_of_type_from_front_to_back(WSWindowType, Callback);
template<typename Callback> IterationDecision for_each_visible_window_from_front_to_back(Callback);
template<typename Callback> IterationDecision for_each_visible_window_from_back_to_front(Callback);
template<typename Callback> void for_each_active_menubar_menu(Callback);
void close_current_menu();
virtual void on_message(WSMessage&) override;
void compose();
void paint_window_frame(WSWindow&);
void flip_buffers();
void tick_clock();
WSScreen& m_screen;
Rect m_screen_rect;
Color m_background_color;
Color m_active_window_border_color;
Color m_active_window_border_color2;
Color m_active_window_title_color;
Color m_inactive_window_border_color;
Color m_inactive_window_border_color2;
Color m_inactive_window_title_color;
Color m_dragging_window_border_color;
Color m_dragging_window_border_color2;
Color m_dragging_window_title_color;
HashMap<int, OwnPtr<WSWindow>> m_windows_by_id;
HashTable<WSWindow*> m_windows;
InlineLinkedList<WSWindow> m_windows_in_order;
WeakPtr<WSWindow> m_active_window;
WeakPtr<WSWindow> m_hovered_window;
WeakPtr<WSWindow> m_drag_window;
Point m_drag_origin;
Point m_drag_window_origin;
WeakPtr<WSWindow> m_resize_window;
Rect m_resize_window_original_rect;
Point m_resize_origin;
ResizeDirection m_resize_direction { ResizeDirection::None };
Rect m_last_cursor_rect;
unsigned m_compose_count { 0 };
unsigned m_flush_count { 0 };
RetainPtr<GraphicsBitmap> m_front_bitmap;
RetainPtr<GraphicsBitmap> m_back_bitmap;
DisjointRectSet m_dirty_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;
RetainPtr<Font> m_font;
String m_wallpaper_path;
RetainPtr<GraphicsBitmap> m_wallpaper;
bool m_flash_flush { false };
bool m_buffers_are_flipped { false };
byte m_keyboard_modifiers { 0 };
OwnPtr<WSMenu> m_system_menu;
Color m_menu_selection_color;
WeakPtr<WSMenuBar> m_current_menubar;
WeakPtr<WSMenu> m_current_menu;
CircularQueue<float, 30> m_cpu_history;
};
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