WindowServer: Include minimised windows for switching

Author: https://github.com/shannonbooth
Commit: https://github.com/SerenityOS/serenity/commit/d1d7db27459
Pull-request: https://github.com/SerenityOS/serenity/pull/952

Servers/WindowServer/WSWindowManager.h

@@ -193,6 +193,8 @@ private:
     void for_each_window_listening_to_wm_events(Callback);
     template<typename Callback>
     void for_each_window(Callback);
+    template<typename Callback>
+    IterationDecision for_each_window_of_type_from_front_to_back(WSWindowType, Callback, bool ignore_highlight = false);
 
     virtual void event(CEvent&) override;
     void paint_window_frame(const WSWindow&);
@@ -412,3 +414,22 @@ void WSWindowManager::for_each_window(Callback callback)
             return;
     }
 }
+
+template<typename Callback>
+IterationDecision WSWindowManager::for_each_window_of_type_from_front_to_back(WSWindowType type, Callback callback, bool ignore_highlight)
+{
+    if (!ignore_highlight && m_highlight_window && m_highlight_window->type() == type && m_highlight_window->is_visible()) {
+        if (callback(*m_highlight_window) == IterationDecision::Break)
+            return IterationDecision::Break;
+    }
+
+    for (auto* window = m_windows_in_order.tail(); window; window = window->prev()) {
+        if (window->type() != type)
+            continue;
+        if (!ignore_highlight && window == m_highlight_window)
+            continue;
+        if (callback(*window) == IterationDecision::Break)
+            return IterationDecision::Break;
+    }
+    return IterationDecision::Continue;
+}

Servers/WindowServer/WSWindowSwitcher.cpp

@@ -47,8 +47,10 @@ void WSWindowSwitcher::on_key_event(const WSKeyEvent& event)
 {
     if (event.type() == WSEvent::KeyUp) {
         if (event.key() == Key_Logo) {
-            if (auto* window = selected_window())
+            if (auto* window = selected_window()) {
+                window->set_minimized(false);
                 WSWindowManager::the().move_to_front_and_make_active(*window);
+            }
             WSWindowManager::the().set_highlight_window(nullptr);
             hide();
         }
@@ -119,7 +121,7 @@ void WSWindowSwitcher::refresh()
     m_selected_index = 0;
     int window_count = 0;
     int longest_title_width = 0;
-    wm.for_each_visible_window_of_type_from_front_to_back(WSWindowType::Normal, [&](WSWindow& window) {
+    wm.for_each_window_of_type_from_front_to_back(WSWindowType::Normal, [&](WSWindow& window) {
         ++window_count;
         longest_title_width = max(longest_title_width, wm.font().width(window.title()));
         if (selected_window == &window)