FL-819 new first start screen, add multiline text (#318)

* GUI Canvas: get current font height routine
* Dolphin: new start screen. GUI: new multiline element.
* Dolphin: up state version to reset it for everyone
* Dolphin: take maximum of idle screen height
* Dolphin: frames on first start screen.

applications/gui/canvas.c

@@ -3,14 +3,6 @@
 
 #include <furi.h>
 
-struct Canvas {
-    u8g2_t fb;
-    uint8_t offset_x;
-    uint8_t offset_y;
-    uint8_t width;
-    uint8_t height;
-};
-
 uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr);
 uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr);
 
@@ -70,6 +62,11 @@ uint8_t canvas_height(Canvas* canvas) {
     return canvas->height;
 }
 
+uint8_t canvas_current_font_height(Canvas* canvas) {
+    furi_assert(canvas);
+    return u8g2_GetMaxCharHeight(&canvas->fb);
+}
+
 void canvas_clear(Canvas* canvas) {
     furi_assert(canvas);
     u8g2_ClearBuffer(&canvas->fb);

applications/gui/canvas.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <stdint.h>
-#include <u8g2.h>
 #include <gui/icon.h>
 #include <assets_icons_i.h>
 
@@ -30,6 +29,12 @@ uint8_t canvas_width(Canvas* canvas);
  */
 uint8_t canvas_height(Canvas* canvas);
 
+/*
+ * Get current font height
+ * @return height in pixels.
+ */
+uint8_t canvas_current_font_height(Canvas* canvas);
+
 /*
  * Clear canvas, clear rendering buffer
  */

applications/gui/canvas_i.h

@@ -1,6 +1,15 @@
 #pragma once
 
 #include "canvas.h"
+#include <u8g2.h>
+
+struct Canvas {
+    u8g2_t fb;
+    uint8_t offset_x;
+    uint8_t offset_y;
+    uint8_t width;
+    uint8_t height;
+};
 
 /*
  * Allocate memory and initialize canvas

applications/gui/elements.c

@@ -1,6 +1,14 @@
 #include "elements.h"
+#include "canvas_i.h"
+
+#include <furi.h>
+
+#include <string.h>
+#include <m-string.h>
 
 void elements_scrollbar(Canvas* canvas, uint8_t pos, uint8_t total) {
+    furi_assert(canvas);
+
     uint8_t width = canvas_width(canvas);
     uint8_t height = canvas_height(canvas);
     // prevent overflows
@@ -19,6 +27,8 @@ void elements_scrollbar(Canvas* canvas, uint8_t pos, uint8_t total) {
 }
 
 void elements_frame(Canvas* canvas, uint8_t x, uint8_t y, uint8_t width, uint8_t height) {
+    furi_assert(canvas);
+
     canvas_draw_line(canvas, x + 2, y, x + width - 2, y);
     canvas_draw_line(canvas, x + 1, y + height - 1, x + width, y + height - 1);
     canvas_draw_line(canvas, x + 2, y + height, x + width - 1, y + height);
@@ -28,4 +38,27 @@ void elements_frame(Canvas* canvas, uint8_t x, uint8_t y, uint8_t width, uint8_t
     canvas_draw_line(canvas, x + width, y + 2, x + width, y + height - 2);
 
     canvas_draw_dot(canvas, x + 1, y + 1);
-}
+}
+
+void elements_multiline_text(Canvas* canvas, uint8_t x, uint8_t y, char* text) {
+    furi_assert(canvas);
+    furi_assert(text);
+
+    uint8_t font_height = canvas_current_font_height(canvas);
+    string_t str;
+    string_init(str);
+    char* start = text;
+    char* end;
+    do {
+        end = strchr(start, '\n');
+        if(end) {
+            string_set_strn(str, start, end - start);
+        } else {
+            string_set_str(str, start);
+        }
+        canvas_draw_str(canvas, x, y, string_get_cstr(str));
+        start = end + 1;
+        y += font_height;
+    } while(end);
+    string_clear(str);
+}

applications/gui/elements.h

@@ -22,6 +22,13 @@ void elements_scrollbar(Canvas* canvas, uint8_t pos, uint8_t total);
  */
 void elements_frame(Canvas* canvas, uint8_t x, uint8_t y, uint8_t width, uint8_t height);
 
+/*
+ * Draw multiline text
+ * @param x, y - top left corner coordinates
+ * @param text - string (possible multiline)
+ */
+void elements_multiline_text(Canvas* canvas, uint8_t x, uint8_t y, char* text);
+
 #ifdef __cplusplus
 }
 #endif

applications/gui/view.h

@@ -3,6 +3,9 @@
 #include <input/input.h>
 #include "canvas.h"
 
+#include <stddef.h>
+#include <stdint.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif