Momentum-Apps/src/app_context.c

#include <gui/modules/menu.h>
#include <gui/modules/popup.h>

#include "tone_gen.h"
#include "app_context.h"

/** custom event handler - passes the event to the scene manager */
bool viewDispatcherCustomCallback(void* context, uint32_t custom_event) {
    furi_assert(context);
    struct AppContext_t* appContext = context;
    return scene_manager_handle_custom_event(appContext->scene_manager, custom_event);
}

/** navigation event handler - passes the event to the scene manager */
bool viewDispatcherNavigationCallback(void* context) {
    furi_assert(context);
    struct AppContext_t* appContext = context;
    return scene_manager_handle_back_event(appContext->scene_manager);
}

AppContextStatus initializeAppContext(
    struct AppContext_t** context,
    int viewsCount,
    const SceneManagerHandlers* sceneManagerHandlers) {
    FURI_LOG_I(TAG, "Allocating memory for app context");

    *context = malloc(sizeof(struct AppContext_t));
    if(*context == NULL) {
        FURI_LOG_E(TAG, "Failed to allocate memory for app context");
        return APP_CONTEXT_CANT_ALLOCATE;
    }

    // Allocate our scene manager with the handlers provided
    FURI_LOG_I(TAG, "Setting up the scene manager");
    (*context)->scene_manager = scene_manager_alloc(sceneManagerHandlers, *context);

    // Now setup our view dispatchers
    FURI_LOG_I(TAG, "Setting up the view dispatcher");
    (*context)->view_dispatcher = view_dispatcher_alloc();
    view_dispatcher_enable_queue((*context)->view_dispatcher);

    FURI_LOG_I(TAG, "Setting view dispatcher callbacks");
    view_dispatcher_set_event_callback_context((*context)->view_dispatcher, (*context));
    FURI_LOG_I(TAG, "Setting view dispatcher custom event callbacks");
    view_dispatcher_set_custom_event_callback(
        (*context)->view_dispatcher, viewDispatcherCustomCallback);
    FURI_LOG_I(TAG, "Setting view dispatcher navigation event callbacks");
    view_dispatcher_set_navigation_event_callback(
        (*context)->view_dispatcher, viewDispatcherNavigationCallback);
    FURI_LOG_I(TAG, "Setting view dispatcher callbacks done");

    (*context)->activeViews = malloc(sizeof(struct View_t) * viewsCount);
    if((*context)->activeViews == NULL) {
        return APP_CONTEXT_CANT_ALLOCATE;
    }
    (*context)->activeViewsCount = viewsCount;

    return APP_CONTEXT_OK;
}

AppContextStatus addViewToAppContext(struct AppContext_t** context, struct View_t* view) {
    if(view->viewId > (*context)->activeViewsCount || view->viewId < 0) {
        FURI_LOG_I(TAG, "Not enough views!");
        return APP_CONTEXT_NOT_ENOUGH_VIEWS;
    }
    (*context)->activeViews[view->viewId] = view;
    return APP_CONTEXT_OK;
}

AppContextStatus freeAppContextViews(struct AppContext_t** context) {
    FURI_LOG_I(TAG, "Freeing views");
    for(int i = 0; i < (*context)->activeViewsCount; i++) {
        struct View_t* view = (*context)->activeViews[i];
        if(view != NULL) {
            view_dispatcher_remove_view((*context)->view_dispatcher, view->viewId);

            switch(view->type) {
            case MENU:
                menu_free(view->viewData);
                break;
            case VIEW:
                view_free(view->viewData);
                break;
            case POPUP:
                popup_free(view->viewData);
                break;
            }
            free(view);
        }
    }
    FURI_LOG_I(TAG, "Removing all views from list");
    free((*context)->activeViews);
    (*context)->activeViewsCount = 0;
    return APP_CONTEXT_OK;
}

AppContextStatus freeAppContext(struct AppContext_t** context) {
    FURI_LOG_I(TAG, "Ensuring views are free'd");
    AppContextStatus result = freeAppContextViews(context);
    if(result != APP_CONTEXT_OK) {
        return APP_CONTEXT_CANT_FREE_VIEWS;
    }
    FURI_LOG_I(TAG, "Freeing the scene");
    scene_manager_free((*context)->scene_manager);
    FURI_LOG_I(TAG, "Freeing the view dispatcher");
    view_dispatcher_free((*context)->view_dispatcher);
    FURI_LOG_I(TAG, "Freeing the app context");
    free((*context));
    return APP_CONTEXT_OK;
}