[FL-867] GUI: ViewPort arrangement API, better input and draw dispatching (#333)

* Input: refactoring, platform agnostic key configuration, update usage across project. Minor queue usage fixes and tick timings.
* Gui: lighter and more efficient input and draw call dispatching, ViewPort rearranging API. View: conditional model updates, API usage update.
* BT: smaller update delay
* GUI: ViewPort visibility check

applications/gui/gui_i.h

@@ -1,7 +1,60 @@
 #pragma once
 
-typedef struct Gui Gui;
+#include "gui.h"
+
+#include <furi.h>
+#include <m-array.h>
+#include <stdio.h>
+
+#include "canvas.h"
+#include "canvas_i.h"
+#include "view_port.h"
+#include "view_port_i.h"
+
+#define GUI_DISPLAY_WIDTH 128
+#define GUI_DISPLAY_HEIGHT 64
+
+#define GUI_STATUS_BAR_X 0
+#define GUI_STATUS_BAR_Y 0
+#define GUI_STATUS_BAR_WIDTH GUI_DISPLAY_WIDTH
+#define GUI_STATUS_BAR_HEIGHT 8
+
+#define GUI_MAIN_X 0
+#define GUI_MAIN_Y 9
+#define GUI_MAIN_WIDTH GUI_DISPLAY_WIDTH
+#define GUI_MAIN_HEIGHT (GUI_DISPLAY_HEIGHT - GUI_MAIN_Y)
+
+#define GUI_THREAD_FLAG_DRAW (1 << 0)
+#define GUI_THREAD_FLAG_INPUT (1 << 1)
+#define GUI_THREAD_FLAG_ALL (GUI_THREAD_FLAG_DRAW | GUI_THREAD_FLAG_INPUT)
+
+ARRAY_DEF(ViewPortArray, ViewPort*, M_PTR_OPLIST);
+
+struct Gui {
+    // Thread and lock
+    osThreadId_t thread;
+    osMutexAttr_t mutex_attr;
+    osMutexId_t mutex;
+    // Layers and Canvas
+    ViewPortArray_t layers[GuiLayerMAX];
+    Canvas* canvas;
+    // Input
+    osMessageQueueId_t input_queue;
+    PubSub* input_events;
+};
+
+ViewPort* gui_view_port_find_enabled(ViewPortArray_t array);
+
+/* Update GUI, request redraw
+ * Real redraw event will be issued only if view_port is currently visible
+ * Setting view_port to NULL forces redraw, but must be avoided
+ * @param gui, Gui instance
+ * @param view_port, ViewPort instance or NULL
+ */
+void gui_update(Gui* gui, ViewPort* view_port);
+
+void gui_input_events_callback(const void* value, void* ctx);
 
-void gui_update(Gui* gui);
 void gui_lock(Gui* gui);
+
 void gui_unlock(Gui* gui);