Introduce the bottom sheet class for Chrome Home

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
 import android.app.assist.AssistContent;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.StrictMode;
 import android.os.SystemClock;
-import android.support.design.widget.CoordinatorLayout.LayoutParams;
 import android.support.v7.app.AlertDialog;
 import android.util.DisplayMetrics;
 import android.util.Pair;
-import android.view.Gravity;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewConfiguration;
 import android.view.ViewGroup;
 import android.view.ViewStub;
 import android.view.Window;
 import android.view.WindowManager;
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityManager.AccessibilityStateChangeListener;
@@ skipping 80 matching lines @@
 import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabObserver;
 import org.chromium.chrome.browser.tabmodel.TabModelUtils;
 import org.chromium.chrome.browser.tabmodel.TabWindowManager;
 import org.chromium.chrome.browser.toolbar.Toolbar;
 import org.chromium.chrome.browser.toolbar.ToolbarControlContainer;
 import org.chromium.chrome.browser.toolbar.ToolbarManager;
 import org.chromium.chrome.browser.util.ChromeFileProvider;
 import org.chromium.chrome.browser.util.ColorUtils;
 import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.webapps.AddToHomescreenManager;
+import org.chromium.chrome.browser.widget.BottomSheet;
 import org.chromium.chrome.browser.widget.ControlContainer;
 import org.chromium.components.bookmarks.BookmarkId;
 import org.chromium.content.browser.ContentVideoView;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.common.ContentSwitches;
 import org.chromium.content_public.browser.ContentBitmapCallback;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.browser.readback_types.ReadbackResponse;
 import org.chromium.policy.CombinedPolicyProvider;
@@ skipping 213 matching lines @@
      * super.setContentView() before using {@link #getTabModelSelector()} or
      * {@link #getCompositorViewHolder()}.
      */
     @Override
     protected final void setContentView() {
         final long begin = SystemClock.elapsedRealtime();
         TraceEvent.begin("onCreate->setContentView()");
 
         enableHardwareAcceleration();
         setLowEndTheme();
+        BottomSheet bottomSheet = null;
+        ControlContainer controlContainer = null;
         int controlContainerLayoutId = getControlContainerLayoutId();
         WarmupManager warmupManager = WarmupManager.getInstance();
         if (warmupManager.hasViewHierarchyWithToolbar(controlContainerLayoutId)) {
             View placeHolderView = new View(this);
             setContentView(placeHolderView);
             ViewGroup contentParent = (ViewGroup) placeHolderView.getParent();
             warmupManager.transferViewHierarchyTo(contentParent);
             contentParent.removeView(placeHolderView);
         } else {
             warmupManager.clearViewHierarchy();
 
             // Allow disk access for the content view and toolbar container setup.
             // On certain android devices this setup sequence results in disk writes outside
             // of our control, so we have to disable StrictMode to work. See crbug.com/639352.
             StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskWrites();
             try {
                 setContentView(R.layout.main);
                 if (controlContainerLayoutId != NO_CONTROL_CONTAINER) {
                     ViewStub toolbarContainerStub =
                             ((ViewStub) findViewById(R.id.control_container_stub));
 
                     toolbarContainerStub.setLayoutResource(controlContainerLayoutId);
                     View container = toolbarContainerStub.inflate();
 
-                    // If the control container is at the bottom apply Gravity.BOTTOM here since
-                    // it is not respected in the XML while the ViewStub in between the
-                    // CompositorViewHolder and ControlContainer.
+                    // Get a handle to the bottom sheet if using the bottom control container.
                     if (controlContainerLayoutId == R.layout.bottom_control_container) {
-                        ((LayoutParams) container.getLayoutParams()).gravity = Gravity.BOTTOM;
+                        bottomSheet = (BottomSheet) findViewById(R.id.bottom_sheet);
                     }
                 }
 
                 // It cannot be assumed that the result of toolbarContainerStub.inflate() will be
                 // the control container since it may be wrapped in another view.
-                ControlContainer controlContainer =
-                        (ControlContainer) findViewById(R.id.control_container);
+                controlContainer = (ControlContainer) findViewById(R.id.control_container);
 
                 // Inflate the correct toolbar layout for the device.
                 int toolbarLayoutId = getToolbarLayoutId();
                 if (toolbarLayoutId != NO_TOOLBAR_LAYOUT && controlContainer != null) {
                     controlContainer.initWithToolbar(toolbarLayoutId);
                 }
             } finally {
                 StrictMode.setThreadPolicy(oldPolicy);
             }
         }
         TraceEvent.end("onCreate->setContentView()");
         mInflateInitialLayoutDurationMs = SystemClock.elapsedRealtime() - begin;
 
         // Set the status bar color to black by default. This is an optimization for
         // Chrome not to draw under status and navigation bars when we use the default
         // black status bar
         ApiCompatibilityUtils.setStatusBarColor(getWindow(), Color.BLACK);
 
         ViewGroup rootView = (ViewGroup) getWindow().getDecorView().getRootView();
         mCompositorViewHolder = (CompositorViewHolder) findViewById(R.id.compositor_view_holder);
         mCompositorViewHolder.setRootView(rootView);
 
+        if (bottomSheet != null) {
+            bottomSheet.init(mCompositorViewHolder, controlContainer.getView());

[Ian Wen, 2017/01/11 19:46:53]

I think you shouldn't let the bottom sheet to know about CompositorViewHolder,
right? The root should be the coordinator.

[mdjones, 2017/01/12 21:26:57]

Already forgot about the new coordinator. Fixed.

+        }
+
         // Setting fitsSystemWindows to false ensures that the root view doesn't consume the insets.
         rootView.setFitsSystemWindows(false);
 
         // Add a custom view right after the root view that stores the insets to access later.
         // ContentViewCore needs the insets to determine the portion of the screen obscured by
         // non-content displaying things such as the OSK.
         mInsetObserverView = InsetObserverView.create(this);
         rootView.addView(mInsetObserverView, 0);
     }
 
@@ skipping 1533 matching lines @@
                 "Android.MultiWindowMode.IsTabletScreenWidthBelow600",
                 mScreenWidthDp < DeviceFormFactor.MINIMUM_TABLET_WIDTH_DP);
 
         if (mScreenWidthDp < DeviceFormFactor.MINIMUM_TABLET_WIDTH_DP) {
             RecordHistogram.recordLinearCountHistogram(
                     "Android.MultiWindowMode.TabletScreenWidth", mScreenWidthDp, 1,
                     DeviceFormFactor.MINIMUM_TABLET_WIDTH_DP, 50);
         }
     }
 }