[FL-2198], [FL-2161] NFC emulation refactoring (#968)

* rfal: add state changed callback
* furi_hal_nfc: add NFC-A emulation API
* nfc: add emulation logger, refactor scenes
* elements: fix text_box element
* gui: fix text box module
* nfc: remove unnecessary buffers
* nfc: introduce emulation callback concept
* nfc: format sources
* bt settings: fix incorrect scene switch
* bt settings: format sources
* Debug: fix x2d import for python 3
* Gui: rename method name widget_clear to widget_reset
* nfc: add nfca emulation handler
* nfc: add global custom events enum
* nfc: UID emulation Data -> Log
* furi_hal_nfc: fix incorrect timings
* u2f, badusb: widget_clear() -> widget_reset()

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/gui/elements.c

@@ -594,7 +594,6 @@ void elements_text_box(
             line[line_num].height = line_height;
             line[line_num].descender = line_descender;
             if(total_height_min + line_leading_min > height) {
-                line_num--;
                 break;
             }
             total_height_min += line_leading_min;
@@ -640,7 +639,7 @@ void elements_text_box(
             uint8_t free_pixel_num = height - total_height_min;
             uint8_t fill_pixel = 0;
             uint8_t j = 1;
-            line[0].y = line[0].height;
+            line[0].y = y + line[0].height;
             while(fill_pixel < free_pixel_num) {
                 line[j].y = line[j - 1].y + line[j - 1].leading_min + 1;
                 fill_pixel++;

applications/gui/modules/text_box.c

@@ -7,17 +7,16 @@
 
 struct TextBox {
     View* view;
-    void* context;
-    TextBoxExitCallback callback;
 };
 
 typedef struct {
     const char* text;
     char* text_pos;
     string_t text_formatted;
-    size_t scroll_pos;
-    size_t scroll_num;
+    int32_t scroll_pos;
+    int32_t scroll_num;
     TextBoxFont font;
+    TextBoxFocus focus;
     bool formatted;
 } TextBoxModel;
 
@@ -52,12 +51,6 @@ static void text_box_process_up(TextBox* text_box) {
         });
 }
 
-static void text_box_process_back(TextBox* text_box) {
-    if(text_box->callback) {
-        text_box->callback(text_box->context);
-    }
-}
-
 static void text_box_insert_endline(Canvas* canvas, TextBoxModel* model) {
     size_t i = 0;
     size_t line_width = 0;
@@ -84,8 +77,18 @@ static void text_box_insert_endline(Canvas* canvas, TextBoxModel* model) {
     line_num++;
     model->text = string_get_cstr(model->text_formatted);
     model->text_pos = (char*)model->text;
-    model->scroll_num = MAX(line_num - 4, 0);
-    model->scroll_pos = 0;
+    if(model->focus == TextBoxFocusEnd && line_num > 5) {
+        // Set text position to 5th line from the end
+        for(uint8_t i = 0; i < line_num - 5; i++) {
+            while(*model->text_pos++ != '\n') {
+            };
+        }
+        model->scroll_num = line_num - 4;
+        model->scroll_pos = line_num - 5;
+    } else {
+        model->scroll_num = MAX(line_num - 4, 0);
+        model->scroll_pos = 0;
+    }
 }
 
 static void text_box_view_draw_callback(Canvas* canvas, void* _model) {
@@ -119,9 +122,6 @@ static bool text_box_view_input_callback(InputEvent* event, void* context) {
         } else if(event->key == InputKeyUp) {
             text_box_process_up(text_box);
             consumed = true;
-        } else if(event->key == InputKeyBack) {
-            text_box_process_back(text_box);
-            consumed = true;
         }
     }
     return consumed;
@@ -172,10 +172,9 @@ void text_box_reset(TextBox* text_box) {
             model->text = NULL;
             string_set_str(model->text_formatted, "");
             model->font = TextBoxFontText;
+            model->focus = TextBoxFocusStart;
             return true;
         });
-    text_box->context = NULL;
-    text_box->callback = NULL;
 }
 
 void text_box_set_text(TextBox* text_box, const char* text) {
@@ -185,6 +184,7 @@ void text_box_set_text(TextBox* text_box, const char* text) {
     with_view_model(
         text_box->view, (TextBoxModel * model) {
             model->text = text;
+            string_reset(model->text_formatted);
             string_reserve(model->text_formatted, strlen(text));
             model->formatted = false;
             return true;
@@ -201,12 +201,12 @@ void text_box_set_font(TextBox* text_box, TextBoxFont font) {
         });
 }
 
-void text_box_set_context(TextBox* text_box, void* context) {
+void text_box_set_focus(TextBox* text_box, TextBoxFocus focus) {
     furi_assert(text_box);
-    text_box->context = context;
-}
 
-void text_box_set_exit_callback(TextBox* text_box, TextBoxExitCallback callback) {
-    furi_assert(text_box);
-    text_box->callback = callback;
+    with_view_model(
+        text_box->view, (TextBoxModel * model) {
+            model->focus = focus;
+            return true;
+        });
 }

applications/gui/modules/text_box.h

@@ -13,13 +13,17 @@ extern "C" {
 
 /** TextBox anonymous structure */
 typedef struct TextBox TextBox;
-typedef void (*TextBoxExitCallback)(void* context);
 
 typedef enum {
     TextBoxFontText,
     TextBoxFontHex,
 } TextBoxFont;
 
+typedef enum {
+    TextBoxFocusStart,
+    TextBoxFocusEnd,
+} TextBoxFocus;
+
 /** Allocate and initialize text_box
  *
  * @return     TextBox instance
@@ -60,19 +64,13 @@ void text_box_set_text(TextBox* text_box, const char* text);
  */
 void text_box_set_font(TextBox* text_box, TextBoxFont font);
 
-/** Set text_box context
+/** Set TextBox focus
+ * @note Use to display from start or from end
  *
  * @param      text_box  TextBox instance
- * @param      context   context pointer
+ * @param      focus     TextBoxFocus instance
  */
-void text_box_set_context(TextBox* text_box, void* context);
-
-/** Set exit callback
- *
- * @param      text_box  TextBox instance
- * @param      callback  TextBoxExitCallback callback pointer
- */
-void text_box_set_exit_callback(TextBox* text_box, TextBoxExitCallback callback);
+void text_box_set_focus(TextBox* text_box, TextBoxFocus focus);
 
 #ifdef __cplusplus
 }

applications/gui/modules/widget.c

@@ -68,7 +68,7 @@ Widget* widget_alloc() {
     return widget;
 }
 
-void widget_clear(Widget* widget) {
+void widget_reset(Widget* widget) {
     furi_assert(widget);
 
     with_view_model(
@@ -89,7 +89,7 @@ void widget_clear(Widget* widget) {
 void widget_free(Widget* widget) {
     furi_assert(widget);
     // Free all elements
-    widget_clear(widget);
+    widget_reset(widget);
     // Free elements container
     with_view_model(
         widget->view, (GuiWidgetModel * model) {

applications/gui/modules/widget.h

@@ -27,11 +27,11 @@ Widget* widget_alloc();
  */
 void widget_free(Widget* widget);
 
-/** Clear Widget
+/** Reset Widget
  *
  * @param      widget  Widget instance
  */
-void widget_clear(Widget* widget);
+void widget_reset(Widget* widget);
 
 /** Get Widget view
  *