1 files changed, 226 insertions, 0 deletions
diff --git a/Libraries/LibGUI/Window.h b/Libraries/LibGUI/Window.h
new file mode 100644
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+++ b/Libraries/LibGUI/Window.h
@@ -0,0 +1,226 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/Badge.h>
+#include <AK/HashMap.h>
+#include <AK/String.h>
+#include <AK/WeakPtr.h>
+#include <LibCore/Object.h>
+#include <LibGfx/Bitmap.h>
+#include <LibGfx/Rect.h>
+#include <LibGUI/WindowType.h>
+
+namespace GUI {
+
+class Action;
+class KeyEvent;
+class WMEvent;
+class Widget;
+class WindowServerConnection;
+
+enum class StandardCursor {
+    None = 0,
+    Arrow,
+    IBeam,
+    ResizeHorizontal,
+    ResizeVertical,
+    ResizeDiagonalTLBR,
+    ResizeDiagonalBLTR,
+    Hand,
+};
+
+class Window : public Core::Object {
+    C_OBJECT(Window)
+public:
+    virtual ~Window() override;
+
+    static Window* from_window_id(int);
+
+    bool is_modal() const { return m_modal; }
+    void set_modal(bool);
+
+    bool is_fullscreen() const { return m_fullscreen; }
+    void set_fullscreen(bool);
+
+    bool is_resizable() const { return m_resizable; }
+    void set_resizable(bool resizable) { m_resizable = resizable; }
+
+    bool is_minimizable() const { return m_minimizable; }
+    void set_minimizable(bool minimizable) { m_minimizable = minimizable; }
+
+    void set_double_buffering_enabled(bool);
+    void set_has_alpha_channel(bool);
+    void set_opacity(float);
+    void set_window_type(WindowType);
+
+    int window_id() const { return m_window_id; }
+
+    String title() const;
+    void set_title(const StringView&);
+
+    bool show_titlebar() const { return m_show_titlebar; };
+    void set_show_titlebar(bool show) { m_show_titlebar = show; };
+
+    Color background_color() const { return m_background_color; }
+    void set_background_color(Color color) { m_background_color = color; }
+
+    enum class CloseRequestDecision {
+        StayOpen,
+        Close,
+    };
+
+    Function<CloseRequestDecision()> on_close_request;
+
+    int x() const { return rect().x(); }
+    int y() const { return rect().y(); }
+    int width() const { return rect().width(); }
+    int height() const { return rect().height(); }
+
+    Gfx::Rect rect() const;
+    Gfx::Size size() const { return rect().size(); }
+    void set_rect(const Gfx::Rect&);
+    void set_rect(int x, int y, int width, int height) { set_rect({ x, y, width, height }); }
+
+    Gfx::Point position() const { return rect().location(); }
+
+    void move_to(int x, int y) { move_to({ x, y }); }
+    void move_to(const Gfx::Point& point) { set_rect({ point, size() }); }
+
+    void resize(int width, int height) { resize({ width, height }); }
+    void resize(const Gfx::Size& size) { set_rect({ position(), size }); }
+
+    virtual void event(Core::Event&) override;
+
+    bool is_visible() const;
+    bool is_active() const { return m_is_active; }
+
+    void show();
+    void hide();
+    virtual void close();
+    void move_to_front();
+
+    void start_wm_resize();
+
+    Widget* main_widget() { return m_main_widget; }
+    const Widget* main_widget() const { return m_main_widget; }
+    void set_main_widget(Widget*);
+
+    Widget* focused_widget() { return m_focused_widget; }
+    const Widget* focused_widget() const { return m_focused_widget; }
+    void set_focused_widget(Widget*);
+
+    void update();
+    void update(const Gfx::Rect&);
+
+    void set_global_cursor_tracking_widget(Widget*);
+    Widget* global_cursor_tracking_widget() { return m_global_cursor_tracking_widget.ptr(); }
+    const Widget* global_cursor_tracking_widget() const { return m_global_cursor_tracking_widget.ptr(); }
+
+    void set_automatic_cursor_tracking_widget(Widget*);
+    Widget* automatic_cursor_tracking_widget() { return m_automatic_cursor_tracking_widget.ptr(); }
+    const Widget* automatic_cursor_tracking_widget() const { return m_automatic_cursor_tracking_widget.ptr(); }
+
+    Widget* hovered_widget() { return m_hovered_widget.ptr(); }
+    const Widget* hovered_widget() const { return m_hovered_widget.ptr(); }
+    void set_hovered_widget(Widget*);
+
+    Gfx::Bitmap* front_bitmap() { return m_front_bitmap.ptr(); }
+    Gfx::Bitmap* back_bitmap() { return m_back_bitmap.ptr(); }
+
+    Gfx::Size size_increment() const { return m_size_increment; }
+    void set_size_increment(const Gfx::Size& increment) { m_size_increment = increment; }
+    Gfx::Size base_size() const { return m_base_size; }
+    void set_base_size(const Gfx::Size& size) { m_base_size = size; }
+
+    void set_override_cursor(StandardCursor);
+
+    void set_icon(const Gfx::Bitmap*);
+    void apply_icon();
+    const Gfx::Bitmap* icon() const { return m_icon.ptr(); }
+
+    Vector<Widget*> focusable_widgets() const;
+
+    virtual void save_to(AK::JsonObject&) override;
+
+    void schedule_relayout();
+
+    static void update_all_windows(Badge<WindowServerConnection>);
+    void notify_state_changed(Badge<WindowServerConnection>, bool minimized, bool occluded);
+
+    virtual bool is_visible_for_timer_purposes() const override { return m_visible_for_timer_purposes; }
+
+    Action* action_for_key_event(const KeyEvent&);
+
+protected:
+    Window(Core::Object* parent = nullptr);
+    virtual void wm_event(WMEvent&);
+
+private:
+    virtual bool is_window() const override final { return true; }
+
+    NonnullRefPtr<Gfx::Bitmap> create_backing_bitmap(const Gfx::Size&);
+    NonnullRefPtr<Gfx::Bitmap> create_shared_bitmap(Gfx::Bitmap::Format, const Gfx::Size&);
+    void set_current_backing_bitmap(Gfx::Bitmap&, bool flush_immediately = false);
+    void flip(const Vector<Gfx::Rect, 32>& dirty_rects);
+
+    RefPtr<Gfx::Bitmap> m_front_bitmap;
+    RefPtr<Gfx::Bitmap> m_back_bitmap;
+    RefPtr<Gfx::Bitmap> m_icon;
+    int m_window_id { 0 };
+    float m_opacity_when_windowless { 1.0f };
+    RefPtr<Widget> m_main_widget;
+    WeakPtr<Widget> m_focused_widget;
+    WeakPtr<Widget> m_global_cursor_tracking_widget;
+    WeakPtr<Widget> m_automatic_cursor_tracking_widget;
+    WeakPtr<Widget> m_hovered_widget;
+    Gfx::Rect m_rect_when_windowless;
+    String m_title_when_windowless;
+    Vector<Gfx::Rect, 32> m_pending_paint_event_rects;
+    Gfx::Size m_size_increment;
+    Gfx::Size m_base_size;
+    Color m_background_color { Color::WarmGray };
+    WindowType m_window_type { WindowType::Normal };
+    bool m_is_active { false };
+    bool m_has_alpha_channel { false };
+    bool m_double_buffering_enabled { true };
+    bool m_modal { false };
+    bool m_resizable { true };
+    bool m_minimizable { true };
+    bool m_fullscreen { false };
+    bool m_show_titlebar { true };
+    bool m_layout_pending { false };
+    bool m_visible_for_timer_purposes { true };
+};
+
+}
+
+template<>
+inline bool Core::is<GUI::Window>(const Core::Object& object)
+{
+    return object.is_window();
+}