Full color support, rework the directory structure

firmware/Application/ScreenManager.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2019  Max Regan
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#pragma once
+
+#include <array>
+
+#include "Bsp/Drivers/DisplayDriver.h"
+#include "Bsp/ReturnCode.h"
+#include "Bsp/Task.h"
+#include "Bsp/macros.h"
+
+#include "Application/ButtonManager.h"
+#include "Application/Screens/Screen.h"
+
+class ScreenManager : public Common::Schedule::Task {
+public:
+
+    ScreenManager(Common::Schedule::TaskScheduler &scheduler,
+                  BSP::DisplayDriver &display,
+                  BSP::ButtonManager &buttons);
+
+    Common::ReturnCode init();
+    Common::ReturnCode set_root_screen(Screen &screen);
+
+    Common::Schedule::NextTime execute() override;
+
+    Common::ReturnCode pop_screen();
+    Common::ReturnCode push_screen(Screen &screen);
+    Common::ReturnCode set_screen(Screen &screen);
+
+private:
+
+    inline Screen *current_screen() {
+        return m_screen_stack[m_screen_stack_depth - 1];
+    }
+    void notify_up_screen();
+    void notify_middle_screen();
+    void notify_down_screen();
+
+    static constexpr std::size_t MAX_SCREEN_STACK = 5;
+
+    Common::Schedule::TaskScheduler &m_scheduler;
+
+    std::array<Screen *, MAX_SCREEN_STACK> m_screen_stack;
+    std::size_t m_screen_stack_depth;
+
+    BSP::DisplayDriver &m_display;
+    BSP::ButtonManager &m_buttons;
+};