Naming and coding style convention, new linter tool. (#945)

* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide

applications/lfrfid/view/elements/button_element.cpp

@@ -0,0 +1,65 @@
+#include "button_element.h"
+#include <gui/elements.h>
+
+ButtonElement::ButtonElement() {
+}
+
+ButtonElement::~ButtonElement() {
+}
+
+void ButtonElement::draw(Canvas* canvas) {
+    if(text != nullptr) {
+        canvas_set_font(canvas, FontSecondary);
+        switch(type) {
+        case Type::Left:
+            elements_button_left(canvas, text);
+            break;
+        case Type::Center:
+            elements_button_center(canvas, text);
+            break;
+        case Type::Right:
+            elements_button_right(canvas, text);
+            break;
+        }
+    }
+}
+
+bool ButtonElement::input(InputEvent* event) {
+    bool consumed = false;
+    if(event->type == InputTypeShort && callback != nullptr) {
+        switch(type) {
+        case Type::Left:
+            if(event->key == InputKeyLeft) {
+                callback(context);
+                consumed = true;
+            }
+            break;
+        case Type::Center:
+            if(event->key == InputKeyOk) {
+                callback(context);
+                consumed = true;
+            }
+            break;
+        case Type::Right:
+            if(event->key == InputKeyRight) {
+                callback(context);
+                consumed = true;
+            }
+            break;
+        }
+    }
+
+    return consumed;
+}
+
+void ButtonElement::set_type(Type _type, const char* _text) {
+    lock_model();
+    type = _type;
+    text = _text;
+    unlock_model(true);
+}
+
+void ButtonElement::set_callback(void* _context, ButtonElementCallback _callback) {
+    context = _context;
+    callback = _callback;
+}