| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.documentsui; |
| |
| import android.content.Context; |
| import android.support.v7.widget.LinearLayoutManager; |
| import android.support.v7.widget.RecyclerView; |
| import android.util.AttributeSet; |
| import android.view.GestureDetector; |
| import android.view.LayoutInflater; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.ImageView; |
| import android.widget.TextView; |
| |
| import com.android.documentsui.NavigationViewManager.Breadcrumb; |
| import com.android.documentsui.NavigationViewManager.Environment; |
| import com.android.documentsui.model.DocumentInfo; |
| import com.android.documentsui.model.RootInfo; |
| |
| import java.util.function.Consumer; |
| |
| /** |
| * Horizontal implementation of breadcrumb used for tablet / desktop device layouts |
| */ |
| public final class HorizontalBreadcrumb extends RecyclerView implements Breadcrumb { |
| |
| private LinearLayoutManager mLayoutManager; |
| private BreadcrumbAdapter mAdapter; |
| private Consumer<Integer> mListener; |
| |
| public HorizontalBreadcrumb(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| } |
| |
| public HorizontalBreadcrumb(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public HorizontalBreadcrumb(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void setup(Environment env, |
| com.android.documentsui.State state, |
| Consumer<Integer> listener) { |
| |
| mListener = listener; |
| mLayoutManager = new LinearLayoutManager( |
| getContext(), LinearLayoutManager.HORIZONTAL, false); |
| mAdapter = new BreadcrumbAdapter(state, env); |
| |
| setLayoutManager(mLayoutManager); |
| addOnItemTouchListener(new ClickListener(getContext(), this::onSingleTapUp)); |
| } |
| |
| @Override |
| public void show(boolean visibility) { |
| if (visibility) { |
| setVisibility(VISIBLE); |
| setAdapter(mAdapter); |
| mLayoutManager.scrollToPosition(mAdapter.getItemCount() - 1); |
| } else { |
| setVisibility(GONE); |
| setAdapter(null); |
| } |
| } |
| |
| @Override |
| public void postUpdate() { |
| } |
| |
| private void onSingleTapUp(MotionEvent e) { |
| View itemView = findChildViewUnder(e.getX(), e.getY()); |
| int pos = getChildAdapterPosition(itemView); |
| if (pos != mAdapter.getItemCount() - 1) { |
| mListener.accept(pos); |
| } |
| } |
| |
| private static final class BreadcrumbAdapter |
| extends RecyclerView.Adapter<BreadcrumbHolder> { |
| |
| private Environment mEnv; |
| private com.android.documentsui.State mState; |
| |
| public BreadcrumbAdapter(com.android.documentsui.State state, Environment env) { |
| mState = state; |
| mEnv = env; |
| } |
| |
| @Override |
| public BreadcrumbHolder onCreateViewHolder(ViewGroup parent, int viewType) { |
| View v = LayoutInflater.from(parent.getContext()) |
| .inflate(R.layout.navigation_breadcrumb_item, null); |
| return new BreadcrumbHolder(v); |
| } |
| |
| @Override |
| public void onBindViewHolder(BreadcrumbHolder holder, int position) { |
| final DocumentInfo doc = getItem(position); |
| |
| if (position == 0) { |
| final RootInfo root = mEnv.getCurrentRoot(); |
| holder.title.setText(root.title); |
| } else { |
| holder.title.setText(doc.displayName); |
| } |
| |
| if (position == getItemCount() - 1) { |
| holder.arrow.setVisibility(View.GONE); |
| } |
| } |
| |
| private DocumentInfo getItem(int position) { |
| return mState.stack.get(mState.stack.size() - position - 1); |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mState.stack.size(); |
| } |
| } |
| |
| private static class BreadcrumbHolder extends RecyclerView.ViewHolder { |
| |
| protected TextView title; |
| protected ImageView arrow; |
| |
| public BreadcrumbHolder(View itemView) { |
| super(itemView); |
| title = (TextView) itemView.findViewById(R.id.breadcrumb_text); |
| arrow = (ImageView) itemView.findViewById(R.id.breadcrumb_arrow); |
| } |
| } |
| |
| private static final class ClickListener extends GestureDetector |
| implements OnItemTouchListener { |
| |
| public ClickListener(Context context, Consumer<MotionEvent> listener) { |
| super(context, new SimpleOnGestureListener() { |
| @Override |
| public boolean onSingleTapUp(MotionEvent e) { |
| listener.accept(e); |
| return true; |
| } |
| }); |
| } |
| |
| @Override |
| public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) { |
| onTouchEvent(e); |
| return false; |
| } |
| |
| @Override |
| public void onTouchEvent(RecyclerView rv, MotionEvent e) { |
| onTouchEvent(e); |
| } |
| |
| @Override |
| public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) { |
| } |
| } |
| } |