Merge "Add task thumbnails to the Recents Go loader." into ub-launcher3-master

    }

    /**

     * Loads task content for a list of tasks, including the label and the icon. Uses the list of

     * tasks since the last load as a cache for loaded content.

     * Loads task content for a list of tasks, including the label, icon, and thumbnail. For content

     * that isn't cached, load the content asynchronously in the background.

     *

     * @param tasksToLoad list of tasks that need to load their content

     * @param onLoadedCallback runnable to run after all tasks have loaded their content

     * @param onFullyLoadedCallback runnable to run after all tasks have loaded their content

     */

    private void loadTaskContents(ArrayList<Task> tasksToLoad,

            @Nullable Runnable onLoadedCallback) {

        AtomicInteger loadRequestsCount = new AtomicInteger(0);

            @Nullable Runnable onFullyLoadedCallback) {

        // Make two load requests per task, one for the icon/title and one for the thumbnail.

        AtomicInteger loadRequestsCount = new AtomicInteger(tasksToLoad.size() * 2);

        Runnable itemLoadedRunnable = () -> {

            if (loadRequestsCount.decrementAndGet() == 0 && onFullyLoadedCallback != null) {

                onFullyLoadedCallback.run();

            }

        };

        for (Task task : tasksToLoad) {

            // Load icon and title.

            int index = mTaskList.indexOf(task);

            if (index >= 0) {

                // If we've already loaded the task and have its content then just copy it over.

                Task loadedTask = mTaskList.get(index);

                task.titleDescription = loadedTask.titleDescription;

                task.icon = loadedTask.icon;

                itemLoadedRunnable.run();

            } else {

                // Otherwise, load the content in the background.

                loadRequestsCount.getAndIncrement();

                mRecentsModel.getIconCache().updateIconInBackground(task, loadedTask -> {

                    if (loadRequestsCount.decrementAndGet() == 0 && onLoadedCallback != null) {

                        onLoadedCallback.run();

                    }

                });

                mRecentsModel.getIconCache().updateIconInBackground(task,

                        loadedTask -> itemLoadedRunnable.run());

            }

        }

        if (loadRequestsCount.get() == 0 && onLoadedCallback != null) {

            onLoadedCallback.run();

            // Load the thumbnail. May return immediately and synchronously if the thumbnail is

            // cached.

            mRecentsModel.getThumbnailCache().updateThumbnailInBackground(task,

                    thumbnail -> itemLoadedRunnable.run());

        }

    }

}