WindowServer+LibGUI+Taskbar: Store window progress as Optional<int>

We were previously using the magical constant -1 to signify that a
window had no progress state. Be more explicit an use an Optional. :^)

Userland/Libraries/LibGUI/Event.h

@@ -126,7 +126,7 @@ public:
 
 class WMWindowStateChangedEvent : public WMEvent {
 public:
-    WMWindowStateChangedEvent(int client_id, int window_id, int parent_client_id, int parent_window_id, const StringView& title, const Gfx::IntRect& rect, bool is_active, bool is_modal, WindowType window_type, bool is_minimized, bool is_frameless, int progress)
+    WMWindowStateChangedEvent(int client_id, int window_id, int parent_client_id, int parent_window_id, const StringView& title, const Gfx::IntRect& rect, bool is_active, bool is_modal, WindowType window_type, bool is_minimized, bool is_frameless, Optional<int> progress)
         : WMEvent(Event::Type::WM_WindowStateChanged, client_id, window_id)
         , m_parent_client_id(parent_client_id)
         , m_parent_window_id(parent_window_id)
@@ -150,7 +150,7 @@ public:
     WindowType window_type() const { return m_window_type; }
     bool is_minimized() const { return m_minimized; }
     bool is_frameless() const { return m_frameless; }
-    int progress() const { return m_progress; }
+    Optional<int> progress() const { return m_progress; }
 
 private:
     int m_parent_client_id;
@@ -162,7 +162,7 @@ private:
     bool m_modal;
     bool m_minimized;
     bool m_frameless;
-    int m_progress;
+    Optional<int> m_progress;
 };
 
 class WMWindowRectChangedEvent : public WMEvent {

Userland/Libraries/LibGUI/Window.cpp

@@ -1021,7 +1021,7 @@ void Window::did_remove_widget(Badge<Widget>, Widget& widget)
         m_automatic_cursor_tracking_widget = nullptr;
 }
 
-void Window::set_progress(int progress)
+void Window::set_progress(Optional<int> progress)
 {
     VERIFY(m_window_id);
     WindowServerConnection::the().post_message(Messages::WindowServer::SetWindowProgress(m_window_id, progress));

Userland/Libraries/LibGUI/Window.h

@@ -190,7 +190,7 @@ public:
 
     Window* find_parent_window();
 
-    void set_progress(int);
+    void set_progress(Optional<int>);
 
     void update_cursor(Badge<Widget>) { update_cursor(); }
 

Userland/Services/Taskbar/TaskbarButton.cpp

@@ -103,8 +103,6 @@ void TaskbarButton::paint_event(GUI::PaintEvent& event)
     if (text().is_empty())
         return;
 
-    bool has_progress = window.progress() >= 0 && window.progress() <= 100;
-
     auto content_rect = rect().shrunken(8, 2);
     auto icon_location = content_rect.center().translated(-(icon.width() / 2), -(icon.height() / 2));
     if (!text().is_empty())
@@ -125,12 +123,12 @@ void TaskbarButton::paint_event(GUI::PaintEvent& event)
         icon_location.move_by(1, 1);
     }
 
-    if (has_progress) {
+    if (window.progress().has_value()) {
         auto adjusted_rect = rect().shrunken(4, 4);
         if (is_being_pressed() || is_checked()) {
             adjusted_rect.set_height(adjusted_rect.height() + 1);
         }
-        paint_custom_progressbar(painter, adjusted_rect, text_rect, palette(), 0, 100, window.progress(), text(), font, text_alignment());
+        paint_custom_progressbar(painter, adjusted_rect, text_rect, palette(), 0, 100, window.progress().value(), text(), font, text_alignment());
     }
 
     if (is_enabled()) {
@@ -142,6 +140,6 @@ void TaskbarButton::paint_event(GUI::PaintEvent& event)
         painter.blit_disabled(icon_location, icon, icon.rect(), palette());
     }
 
-    if (!has_progress)
+    if (!window.progress().has_value())
         paint_text(painter, text_rect, font, text_alignment());
 }

Userland/Services/Taskbar/WindowList.h

@@ -48,7 +48,7 @@ public:
     void set_modal(bool modal) { m_modal = modal; }
     bool is_modal() const { return m_modal; }
 
-    void set_progress(int progress)
+    void set_progress(Optional<int> progress)
     {
         if (m_progress == progress)
             return;
@@ -57,7 +57,7 @@ public:
             m_button->update();
     }
 
-    int progress() const { return m_progress; }
+    Optional<int> progress() const { return m_progress; }
 
     const Gfx::Bitmap* icon() const { return m_icon.ptr(); }
 
@@ -71,7 +71,7 @@ private:
     bool m_active { false };
     bool m_minimized { false };
     bool m_modal { false };
-    int m_progress { -1 };
+    Optional<int> m_progress;
 };
 
 class WindowList {

Userland/Services/WindowServer/Window.cpp

@@ -918,7 +918,7 @@ bool Window::is_modal() const
     return true;
 }
 
-void Window::set_progress(int progress)
+void Window::set_progress(Optional<int> progress)
 {
     if (m_progress == progress)
         return;

Userland/Services/WindowServer/Window.h

@@ -72,8 +72,6 @@ class Window final : public Core::Object
     , public InlineLinkedListNode<Window> {
     C_OBJECT(Window)
 public:
-    Window(ClientConnection&, WindowType, int window_id, bool modal, bool minimizable, bool frameless, bool resizable, bool fullscreen, bool accessory, Window* parent_window = nullptr);
-    Window(Core::Object&, WindowType);
     virtual ~Window() override;
 
     bool is_modified() const { return m_modified; }
@@ -295,8 +293,8 @@ public:
 
     bool should_show_menubar() const { return m_should_show_menubar; }
 
-    int progress() const { return m_progress; }
-    void set_progress(int);
+    Optional<int> progress() const { return m_progress; }
+    void set_progress(Optional<int>);
 
     bool is_destroyed() const { return m_destroyed; }
     void destroy();
@@ -324,6 +322,9 @@ public:
     void set_menubar(Menubar*);
 
 private:
+    Window(ClientConnection&, WindowType, int window_id, bool modal, bool minimizable, bool frameless, bool resizable, bool fullscreen, bool accessory, Window* parent_window = nullptr);
+    Window(Core::Object&, WindowType);
+
     virtual void event(Core::Event&) override;
     void handle_mouse_event(const MouseEvent&);
     void handle_keydown_event(const KeyEvent&);
@@ -398,7 +399,7 @@ private:
     MenuItem* m_window_menu_close_item { nullptr };
     MenuItem* m_window_menu_menubar_visibility_item { nullptr };
     int m_minimize_animation_step { -1 };
-    int m_progress { -1 };
+    Optional<int> m_progress;
     bool m_should_show_menubar { true };
     bool m_modified { false };
 };

Userland/Services/WindowServer/WindowManagerClient.ipc

@@ -1,7 +1,7 @@
 endpoint WindowManagerClient
 {
     WindowRemoved(i32 wm_id, i32 client_id, i32 window_id) =|
-    WindowStateChanged(i32 wm_id, i32 client_id, i32 window_id, i32 parent_client_id, i32 parent_window_id, bool is_active, bool is_minimized, bool is_modal, bool is_frameless, i32 window_type, [UTF8] String title, Gfx::IntRect rect, i32 progress) =|
+    WindowStateChanged(i32 wm_id, i32 client_id, i32 window_id, i32 parent_client_id, i32 parent_window_id, bool is_active, bool is_minimized, bool is_modal, bool is_frameless, i32 window_type, [UTF8] String title, Gfx::IntRect rect, Optional<i32> progress) =|
     WindowIconBitmapChanged(i32 wm_id, i32 client_id, i32 window_id, Gfx::ShareableBitmap bitmap) =|
     WindowRectChanged(i32 wm_id, i32 client_id, i32 window_id, Gfx::IntRect rect) =|
     AppletAreaSizeChanged(i32 wm_id, Gfx::IntSize size) =|

Userland/Services/WindowServer/WindowServer.ipc

@@ -54,7 +54,7 @@ endpoint WindowServer
     SetWindowTitle(i32 window_id, [UTF8] String title) => ()
     GetWindowTitle(i32 window_id) => ([UTF8] String title)
 
-    SetWindowProgress(i32 window_id, i32 progress) =|
+    SetWindowProgress(i32 window_id, Optional<i32> progress) =|
 
     SetWindowModified(i32 window_id, bool modified) =|
     IsWindowModified(i32 window_id) => (bool modified)