[FL-2556] Update complete screen (#1332)

* Desktop: slideshow implementation
* Updater: handling splashscreen installation; added format version field to slideshow binary
* Desktop: added bidirectional slideshow navigation + instant cancel by "back" button; Updater: rebalanced update stages weights
* Updater: fixed missing field init; fixed potential loop when baking slideshows
* Assets: fixed "update complete" image to match original
* Desktop: added check for slideshow file version
* Scripts: slideshow.py cleanup
* Desktop: removed first start intro sequence
* Desktop: removed first start remnants

applications/desktop/views/desktop_view_slideshow.c

@@ -0,0 +1,108 @@
+#include <furi.h>
+#include <furi_hal.h>
+#include <gui/elements.h>
+
+#include "../desktop_i.h"
+#include "desktop_view_slideshow.h"
+#include "../helpers/slideshow.h"
+
+struct DesktopSlideshowView {
+    View* view;
+    DesktopSlideshowViewCallback callback;
+    void* context;
+};
+
+typedef struct {
+    uint8_t page;
+    Slideshow* slideshow;
+} DesktopSlideshowViewModel;
+
+static void desktop_view_slideshow_draw(Canvas* canvas, void* model) {
+    DesktopSlideshowViewModel* m = model;
+
+    canvas_clear(canvas);
+    slideshow_draw(m->slideshow, canvas, 0, 0);
+}
+
+static bool desktop_view_slideshow_input(InputEvent* event, void* context) {
+    furi_assert(event);
+    DesktopSlideshowView* instance = context;
+
+    if(event->type == InputTypeShort) {
+        DesktopSlideshowViewModel* model = view_get_model(instance->view);
+        bool end_slideshow = false;
+        switch(event->key) {
+        case InputKeyLeft:
+            slideshow_goback(model->slideshow);
+            break;
+        case InputKeyRight:
+        case InputKeyOk:
+            end_slideshow = !slideshow_advance(model->slideshow);
+            break;
+        case InputKeyBack:
+            end_slideshow = true;
+        default:
+            break;
+        }
+        if(end_slideshow) {
+            instance->callback(DesktopSlideshowCompleted, instance->context);
+        }
+        view_commit_model(instance->view, true);
+    }
+
+    return true;
+}
+
+static void desktop_view_slideshow_enter(void* context) {
+    DesktopSlideshowView* instance = context;
+
+    DesktopSlideshowViewModel* model = view_get_model(instance->view);
+    model->slideshow = slideshow_alloc();
+    if(!slideshow_load(model->slideshow, "/int/slideshow")) {
+        instance->callback(DesktopSlideshowCompleted, instance->context);
+    }
+    view_commit_model(instance->view, false);
+}
+
+static void desktop_view_slideshow_exit(void* context) {
+    DesktopSlideshowView* instance = context;
+
+    DesktopSlideshowViewModel* model = view_get_model(instance->view);
+    slideshow_free(model->slideshow);
+    view_commit_model(instance->view, false);
+}
+
+DesktopSlideshowView* desktop_view_slideshow_alloc() {
+    DesktopSlideshowView* instance = malloc(sizeof(DesktopSlideshowView));
+    instance->view = view_alloc();
+    view_allocate_model(instance->view, ViewModelTypeLocking, sizeof(DesktopSlideshowViewModel));
+    view_set_context(instance->view, instance);
+    view_set_draw_callback(instance->view, (ViewDrawCallback)desktop_view_slideshow_draw);
+    view_set_input_callback(instance->view, desktop_view_slideshow_input);
+    view_set_enter_callback(instance->view, desktop_view_slideshow_enter);
+    view_set_exit_callback(instance->view, desktop_view_slideshow_exit);
+
+    return instance;
+}
+
+void desktop_view_slideshow_free(DesktopSlideshowView* instance) {
+    furi_assert(instance);
+
+    view_free(instance->view);
+    free(instance);
+}
+
+View* desktop_view_slideshow_get_view(DesktopSlideshowView* instance) {
+    furi_assert(instance);
+    return instance->view;
+}
+
+void desktop_view_slideshow_set_callback(
+    DesktopSlideshowView* instance,
+    DesktopSlideshowViewCallback callback,
+    void* context) {
+    furi_assert(instance);
+    furi_assert(callback);
+    instance->callback = callback;
+    instance->context = context;
+}