[Android] Move keyboard delegate into ActivityWindow

Before this CL, several places (esp. in browser/) would override the
instance of the keyboard delegate in ui/. This caused an inconsistent,
hard to track state of the KeyboardVisibilityDelegate.

With this CL, the ui/ takes control of setting the delegate and specific
browser-side implementations are called by using the appropriate factory
methods. For that, the KeyboardVisibilityDelegate (brief: KVD) uses
sublasses with very clearly split responsibilities:

KeyboardVisibilityDelegate (ui/; public interface for all clients)
<-- ActivityKVD (ui/; propagates visibility changes to listeners)
  <-- SingleWindowKVD (browser/; prevents multi-window use)
    <-- ChromeKVD (browser/ separates extensions/native)
      <-- FakeKeyboard (javatests/; mocks native keyboard)

The CL actually has no functional changes, it performs these moves:
 - WindowAndroid Listeners moved into KeyboardVisibilityDelegate
 - AcivityWindowAndroid callbacks moved into ActivityKVD
 - ProcessInitializationHandler delegate became SingleWindowKVD
 - ManualFillingTestHelper's FakeKeyboard became a new, public class

Functional changes follow with https://crrev.com/c/1286426 and mainly
affect the ChromeKVD.

Purpose of isAndroidSoftKeyboardShowing(...) and
hideAndroidSoftKeyboardKeyboard(...):
 - Template methods to simplify mocking the calls to InputMethodManager
 - Ensures access to keyboard without extensions in subclasses (e.g. Chrome KVD)
 - prevents use of @CallSuper

Change-Id: I06cf50f48625d2d883efc8cd66a3d062204e51b2
Reviewed-on: https://chromium-review.googlesource.com/c/1286649
Commit-Queue: Friedrich Horschig [EDT] <fhorschig@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602293}

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

+// Copyright 2018 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.app.Activity;
+import android.content.Context;
+import android.support.annotation.Nullable;
+import android.view.View;
+
+import org.chromium.chrome.browser.init.SingleWindowKeyboardVisibilityDelegate;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * A {@link SingleWindowKeyboardVisibilityDelegate} that considers UI elements of a
+ * {@link ChromeActivity} which amend or replace the keyboard.
+ */
+public class ChromeKeyboardVisibilityDelegate extends SingleWindowKeyboardVisibilityDelegate {
+    /**
+     * Creates a new visibility delegate.
+     * @param activity A {@link WeakReference} to a {@link ChromeActivity}.
+     */
+    public ChromeKeyboardVisibilityDelegate(WeakReference<Activity> activity) {
+        super(activity);
+        assert activity.get() instanceof ChromeActivity;
+    }
+
+    @Override
+    public @Nullable ChromeActivity getActivity() {
+        return (ChromeActivity) super.getActivity();
+    }
+
+    /**
+     * Hide only Android's soft keyboard. Keeps eventual keyboard replacements and extensions
+     * untouched. Usually, you will want to call {@link #hideKeyboard(View)}.
+     * @param view A focused {@link View}.
+     * @return True if the keyboard was visible before this call.
+     */
+    public boolean hideSoftKeyboardOnly(View view) {
+        return hideAndroidSoftKeyboard(view);
+    }
+
+    /**
+     * Returns whether Android soft keyboard is showing and ignores all extensions/replacements.
+     * Usually, you will want to call {@link #isKeyboardShowing(Context, View)}.
+     * @param context A {@link Context} instance.
+     * @param view    A {@link View}.
+     * @return Returns true if Android's soft keyboard is visible. Ignores extensions/replacements.
+     */
+    public boolean isSoftKeyboardShowing(Context context, View view) {
+        return isAndroidSoftKeyboardShowing(context, view);
+    }
+}
\ No newline at end of file

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

@@ -7,19 +7,33 @@ package org.chromium.chrome.browser;
 import android.app.Activity;
 import android.view.View;
 
+import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.browser.infobar.InfoBarIdentifier;
 import org.chromium.chrome.browser.infobar.SimpleConfirmInfoBarBuilder;
 import org.chromium.chrome.browser.metrics.WebApkUma;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.webapps.WebApkActivity;
 import org.chromium.ui.base.ActivityAndroidPermissionDelegate;
+import org.chromium.ui.base.ActivityKeyboardVisibilityDelegate;
 import org.chromium.ui.base.ActivityWindowAndroid;
 
+import java.lang.ref.WeakReference;
+
 /**
  * The window that has access to the main activity and is able to create and receive intents,
  * and show error messages.
  */
 public class ChromeWindow extends ActivityWindowAndroid {
+    /**
+     * Interface allowing to inject a different keyboard delegate for testing.
+     */
+    @VisibleForTesting
+    public interface KeyboardVisibilityDelegateFactory {
+        ActivityKeyboardVisibilityDelegate create(WeakReference<Activity> activity);
+    }
+    private static KeyboardVisibilityDelegateFactory sKeyboardVisibilityDelegateFactory =
+            ChromeKeyboardVisibilityDelegate::new;
+
     /**
      * Creates Chrome specific ActivityWindowAndroid.
      * @param activity The activity that owns the ChromeWindow.
@@ -53,6 +67,11 @@ public class ChromeWindow extends ActivityWindowAndroid {
         };
     }
 
+    @Override
+    protected ActivityKeyboardVisibilityDelegate createKeyboardVisibilityDelegate() {
+        return sKeyboardVisibilityDelegateFactory.create(getActivity());
+    }
+
     /**
      * Shows an infobar error message overriding the WindowAndroid implementation.
      */
@@ -71,4 +90,15 @@ public class ChromeWindow extends ActivityWindowAndroid {
             super.showCallbackNonExistentError(error);
         }
     }
+
+    @VisibleForTesting
+    public static void setKeyboardVisibilityDelegateFactory(
+            KeyboardVisibilityDelegateFactory factory) {
+        sKeyboardVisibilityDelegateFactory = factory;
+    }
+
+    @VisibleForTesting
+    public static void resetKeyboardVisibilityDelegateFactory() {
+        setKeyboardVisibilityDelegateFactory(ChromeKeyboardVisibilityDelegate::new);
+    }
 }

chrome/android/java/src/org/chromium/chrome/browser/autofill/keyboard_accessory/ManualFillingMediator.java

@@ -13,6 +13,7 @@ import org.chromium.base.Supplier;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.ChromeFeatureList;
+import org.chromium.chrome.browser.ChromeKeyboardVisibilityDelegate;
 import org.chromium.chrome.browser.InsetObserverView;
 import org.chromium.chrome.browser.autofill.keyboard_accessory.KeyboardAccessoryData.Action;
 import org.chromium.chrome.browser.autofill.keyboard_accessory.KeyboardAccessoryData.Provider;
@@ -31,6 +32,7 @@ import org.chromium.chrome.browser.tabmodel.TabModel;
 import org.chromium.chrome.browser.tabmodel.TabModelObserver;
 import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabModelObserver;
 import org.chromium.ui.DropdownPopupWindow;
+import org.chromium.ui.KeyboardVisibilityDelegate;
 import org.chromium.ui.base.WindowAndroid;
 
 import java.util.HashMap;
@@ -43,7 +45,7 @@ import java.util.Map;
 class ManualFillingMediator
         extends EmptyTabObserver implements KeyboardAccessoryCoordinator.VisibilityDelegate {
     private WindowAndroid mWindowAndroid;
-    private final WindowAndroid.KeyboardVisibilityListener mVisibilityListener =
+    private final KeyboardVisibilityDelegate.KeyboardVisibilityListener mVisibilityListener =
             this::onKeyboardVisibilityChanged;
     private Supplier<InsetObserverView> mInsetObserverViewSupplier;
     private boolean mShouldShow = false;
@@ -155,7 +157,7 @@ class ManualFillingMediator
         setInsetObserverViewSupplier(mActivity::getInsetObserverView);
         LayoutManager manager = getLayoutManager();
         if (manager != null) manager.addSceneChangeObserver(mTabSwitcherObserver);
-        windowAndroid.addKeyboardVisibilityListener(mVisibilityListener);
+        windowAndroid.getKeyboardDelegate().addKeyboardVisibilityListener(mVisibilityListener);
         mTabModelObserver = new TabModelSelectorTabModelObserver(mActivity.getTabModelSelector()) {
             @Override
             public void didSelectTab(Tab tab, @TabModel.TabSelectionType int type, int lastId) {
@@ -224,7 +226,7 @@ class ManualFillingMediator
     void destroy() {
         if (!isInitialized()) return;
         pause();
-        mWindowAndroid.removeKeyboardVisibilityListener(mVisibilityListener);
+        getKeyboard().removeKeyboardVisibilityListener(mVisibilityListener);
         LayoutManager manager = getLayoutManager();
         if (manager != null) manager.removeSceneChangeObserver(mTabSwitcherObserver);
         mWindowAndroid = null;
@@ -245,7 +247,7 @@ class ManualFillingMediator
         pause();
         ViewGroup contentView = getContentView();
         if (contentView != null) {
-            mWindowAndroid.getKeyboardDelegate().hideKeyboard(getContentView());
+            getKeyboard().hideSoftKeyboardOnly(getContentView());
         }
     }
 
@@ -257,7 +259,7 @@ class ManualFillingMediator
         if (!isInitialized() || !mKeyboardAccessory.hasContents() || mShouldShow) return;
         mShouldShow = true;
         ViewGroup contentView = getContentView();
-        if (mWindowAndroid.getKeyboardDelegate().isKeyboardShowing(mActivity, contentView)) {
+        if (getKeyboard().isSoftKeyboardShowing(mActivity, contentView)) {
             displayKeyboardAccessory();
         }
     }
@@ -309,14 +311,14 @@ class ManualFillingMediator
         View rootView = contentView.getRootView();
         if (rootView == null) return;
         mAccessorySheet.setHeight(calculateAccessorySheetHeight(rootView));
-        mWindowAndroid.getKeyboardDelegate().hideKeyboard(contentView);
+        getKeyboard().hideSoftKeyboardOnly(contentView);
     }
 
     @Override
     public void onCloseAccessorySheet() {
         ViewGroup contentView = getContentView();
         if (contentView == null || mActivity == null) return; // The tab was cleaned up already.
-        if (mWindowAndroid.getKeyboardDelegate().isKeyboardShowing(mActivity, contentView)) {
+        if (getKeyboard().isSoftKeyboardShowing(mActivity, contentView)) {
             return; // If the keyboard is showing or is starting to show, the sheet closes gently.
         }
         mActivity.getFullscreenManager().setBottomControlsHeight(mPreviousControlHeight);
@@ -339,7 +341,7 @@ class ManualFillingMediator
         assert mActivity != null : "ManualFillingMediator needs initialization.";
         mKeyboardExtensionSizeManager.setKeyboardExtensionHeight(calculateAccessoryBarHeight());
         if (mActivity.getCurrentFocus() != null) {
-            mWindowAndroid.getKeyboardDelegate().showKeyboard(mActivity.getCurrentFocus());
+            getKeyboard().showKeyboard(mActivity.getCurrentFocus());
         }
     }
 
@@ -386,6 +388,11 @@ class ManualFillingMediator
         return compositorViewHolder.getLayoutManager();
     }
 
+    private ChromeKeyboardVisibilityDelegate getKeyboard() {
+        KeyboardVisibilityDelegate delegate = mWindowAndroid.getKeyboardDelegate();
+        return (ChromeKeyboardVisibilityDelegate) delegate;
+    }
+
     private AccessoryState getOrCreateAccessoryState(Tab tab) {
         assert tab != null : "Accessory state was requested without providing a non-null tab!";
         AccessoryState state = mModel.get(tab);
@@ -418,7 +425,7 @@ class ManualFillingMediator
         // Without known inset (which is keyboard + bottom soft keys), use the keyboard height.
         return Math.max(mActivity.getResources().getDimensionPixelSize(
                                 org.chromium.chrome.R.dimen.keyboard_accessory_suggestion_height),
-                mWindowAndroid.getKeyboardDelegate().calculateKeyboardHeight(mActivity, rootView));
+                getKeyboard().calculateKeyboardHeight(rootView));
     }
 
     private @Px int calculateAccessoryBarHeight() {

chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java

@@ -5,13 +5,11 @@
 package org.chromium.chrome.browser.init;
 
 import android.annotation.TargetApi;
-import android.app.Activity;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.SystemClock;
 import android.support.annotation.WorkerThread;
-import android.view.View;
 import android.view.inputmethod.InputMethodInfo;
 import android.view.inputmethod.InputMethodManager;
 import android.view.inputmethod.InputMethodSubtype;
@@ -55,7 +53,6 @@ import org.chromium.chrome.browser.media.MediaCaptureNotificationService;
 import org.chromium.chrome.browser.media.MediaViewerUtils;
 import org.chromium.chrome.browser.metrics.LaunchMetrics;
 import org.chromium.chrome.browser.metrics.PackageMetrics;
-import org.chromium.chrome.browser.multiwindow.MultiWindowUtils;
 import org.chromium.chrome.browser.net.spdyproxy.DataReductionProxySettings;
 import org.chromium.chrome.browser.notifications.channels.ChannelsUpdater;
 import org.chromium.chrome.browser.ntp.NewTabPage;
@@ -82,7 +79,6 @@ import org.chromium.content_public.common.ContentSwitches;
 import org.chromium.printing.PrintDocumentAdapterWrapper;
 import org.chromium.printing.PrintingControllerImpl;
 import org.chromium.ui.ContactsPickerListener;
-import org.chromium.ui.KeyboardVisibilityDelegate;
 import org.chromium.ui.PhotoPickerListener;
 import org.chromium.ui.UiUtils;
 import org.chromium.ui.base.SelectFileDialog;
@@ -152,24 +148,6 @@ public class ProcessInitializationHandler {
     protected void handlePreNativeInitialization() {
         Context application = ContextUtils.getApplicationContext();
 
-        KeyboardVisibilityDelegate.setInstance(new KeyboardVisibilityDelegate() {
-            @Override
-            public boolean isKeyboardShowing(Context context, View view) {
-                Activity activity = null;
-                if (context instanceof Activity) {
-                    activity = (Activity) context;
-                } else if (view != null && view.getContext() instanceof Activity) {
-                    activity = (Activity) view.getContext();
-                }
-
-                if (activity != null
-                        && MultiWindowUtils.getInstance().isLegacyMultiWindow(activity)) {
-                    return false; // For multi-window mode we do not track keyboard visibility.
-                }
-                return super.isKeyboardShowing(context, view);
-            }
-        });
-
         // Initialize the AccountManagerFacade with the correct AccountManagerDelegate. Must be done
         // only once and before AccountMangerHelper.get(...) is called to avoid using the
         // default AccountManagerDelegate.

chrome/android/java/src/org/chromium/chrome/browser/init/SingleWindowKeyboardVisibilityDelegate.java

+// Copyright 2018 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.init;
+
+import android.app.Activity;
+import android.content.Context;
+import android.view.View;
+
+import org.chromium.chrome.browser.multiwindow.MultiWindowUtils;
+import org.chromium.ui.base.ActivityKeyboardVisibilityDelegate;
+import org.chromium.ui.base.WindowAndroid;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * A {@link ActivityKeyboardVisibilityDelegate} that prevents the multi-window functionality from
+ * triggering the layout-based keyboard detection.
+ */
+public class SingleWindowKeyboardVisibilityDelegate extends ActivityKeyboardVisibilityDelegate {
+    public SingleWindowKeyboardVisibilityDelegate(WeakReference<Activity> activity) {
+        super(activity);
+    }
+
+    @Override
+    public boolean isKeyboardShowing(Context context, View view) {
+        Activity activity = WindowAndroid.activityFromContext(context);
+        if (activity == null && view != null && view.getContext() instanceof Activity) {
+            activity = (Activity) view.getContext();
+        }
+
+        if (activity != null && MultiWindowUtils.getInstance().isLegacyMultiWindow(activity)) {
+            return false; // For multi-window mode we do not track keyboard visibility.
+        }
+        return super.isKeyboardShowing(context, view);
+    }
+}
\ No newline at end of file

chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchActivity.java

@@ -25,6 +25,7 @@ import org.chromium.chrome.browser.WindowDelegate;
 import org.chromium.chrome.browser.customtabs.CustomTabsConnection;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.init.AsyncInitializationActivity;
+import org.chromium.chrome.browser.init.SingleWindowKeyboardVisibilityDelegate;
 import org.chromium.chrome.browser.locale.LocaleManager;
 import org.chromium.chrome.browser.omnibox.suggestions.AutocompleteController;
 import org.chromium.chrome.browser.snackbar.SnackbarManager;
@@ -37,6 +38,7 @@ import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.components.url_formatter.UrlFormatter;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.common.ContentUrlConstants;
+import org.chromium.ui.base.ActivityKeyboardVisibilityDelegate;
 import org.chromium.ui.base.ActivityWindowAndroid;
 
 /** Queries the user's default search engine and shows autocomplete suggestions. */
@@ -115,7 +117,12 @@ public class SearchActivity extends AsyncInitializationActivity
 
     @Override
     protected ActivityWindowAndroid createWindowAndroid() {
-        return new ActivityWindowAndroid(this);
+        return new ActivityWindowAndroid(this) {
+            @Override
+            protected ActivityKeyboardVisibilityDelegate createKeyboardVisibilityDelegate() {
+                return new SingleWindowKeyboardVisibilityDelegate(getActivity());
+            }
+        };
     }
 
     @Override

chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarMediator.java

@@ -22,8 +22,8 @@ import org.chromium.chrome.browser.toolbar.ToolbarButtonSlotData.ToolbarButtonDa
 import org.chromium.chrome.browser.widget.textbubble.TextBubble;
 import org.chromium.components.feature_engagement.FeatureConstants;
 import org.chromium.components.feature_engagement.Tracker;
+import org.chromium.ui.KeyboardVisibilityDelegate;
 import org.chromium.ui.base.WindowAndroid;
-import org.chromium.ui.base.WindowAndroid.KeyboardVisibilityListener;
 import org.chromium.ui.resources.ResourceManager;
 import org.chromium.ui.widget.ViewRectProvider;
 
@@ -32,9 +32,9 @@ import org.chromium.ui.widget.ViewRectProvider;
  * coordinators, running most of the business logic associated with the bottom toolbar, and updating
  * the model accordingly.
  */
-class BottomToolbarMediator implements FullscreenListener, KeyboardVisibilityListener,
-                                       OverlayPanelManagerObserver, OverviewModeObserver,
-                                       SceneChangeObserver {
+class BottomToolbarMediator
+        implements FullscreenListener, KeyboardVisibilityDelegate.KeyboardVisibilityListener,
+                   OverlayPanelManagerObserver, OverviewModeObserver, SceneChangeObserver {
     /** The amount of time to show the Duet help bubble for. */
     private static final int DUET_IPH_BUBBLE_SHOW_DURATION_MS = 6000;
 
@@ -106,7 +106,9 @@ class BottomToolbarMediator implements FullscreenListener, KeyboardVisibilityLis
     void destroy() {
         mFullscreenManager.removeListener(this);
         if (mOverviewModeBehavior != null) mOverviewModeBehavior.removeOverviewModeObserver(this);
-        if (mWindowAndroid != null) mWindowAndroid.removeKeyboardVisibilityListener(this);
+        if (mWindowAndroid != null) {
+            mWindowAndroid.getKeyboardDelegate().removeKeyboardVisibilityListener(this);
+        }
         if (mModel.get(BottomToolbarModel.LAYOUT_MANAGER) != null) {
             LayoutManager manager = mModel.get(BottomToolbarModel.LAYOUT_MANAGER);
             manager.getOverlayPanelManager().removeObserver(this);
@@ -229,7 +231,7 @@ class BottomToolbarMediator implements FullscreenListener, KeyboardVisibilityLis
         assert mWindowAndroid == null : "#setWindowAndroid should only be called once per toolbar.";
         // Watch for keyboard events so we can hide the bottom toolbar when the keyboard is showing.
         mWindowAndroid = windowAndroid;
-        mWindowAndroid.addKeyboardVisibilityListener(this);
+        mWindowAndroid.getKeyboardDelegate().addKeyboardVisibilityListener(this);
     }
 
     void setTabSwitcherButtonData(

chrome/android/java_sources.gni

@@ -31,6 +31,7 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/ChromeBackupWatcher.java",
   "java/src/org/chromium/chrome/browser/ChromeFeatureList.java",
   "java/src/org/chromium/chrome/browser/ChromeHttpAuthHandler.java",
+  "java/src/org/chromium/chrome/browser/ChromeKeyboardVisibilityDelegate.java",
   "java/src/org/chromium/chrome/browser/ChromeStrictMode.java",
   "java/src/org/chromium/chrome/browser/ChromeStringConstants.java",
   "java/src/org/chromium/chrome/browser/ChromeSwitches.java",
@@ -770,6 +771,7 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/init/NativeInitializationController.java",
   "java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java",
   "java/src/org/chromium/chrome/browser/init/ServiceManagerStartupUtils.java",
+  "java/src/org/chromium/chrome/browser/init/SingleWindowKeyboardVisibilityDelegate.java",
   "java/src/org/chromium/chrome/browser/installedapp/InstalledAppProviderFactory.java",
   "java/src/org/chromium/chrome/browser/installedapp/InstalledAppProviderImpl.java",
   "java/src/org/chromium/chrome/browser/installedapp/PackageHash.java",
@@ -1793,6 +1795,7 @@ chrome_test_java_sources = [
   "javatests/src/org/chromium/chrome/browser/autofill/AutofillTestHelper.java",
   "javatests/src/org/chromium/chrome/browser/autofill/PersonalDataManagerTest.java",
   "javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/AccessorySheetViewTest.java",
+  "javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/FakeKeyboard.java",
   "javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/KeyboardAccessoryViewTest.java",
   "javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/ManualFillingIntegrationTest.java",
   "javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/ManualFillingTestHelper.java",

chrome/android/javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/FakeKeyboard.java

+// Copyright 2018 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.autofill.keyboard_accessory;
+
+import static org.chromium.base.ThreadUtils.runOnUiThreadBlocking;
+
+import android.app.Activity;
+import android.content.Context;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.chromium.chrome.browser.ChromeKeyboardVisibilityDelegate;
+import org.chromium.chrome.browser.ChromeWindow;
+import org.chromium.chrome.browser.InsetObserverView;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * This class allows to mock the {@link org.chromium.ui.KeyboardVisibilityDelegate} in any given
+ * {@link org.chromium.chrome.test.ChromeActivityTestRule} which allows to write tests relying on
+ * keyboard without having to deal with the soft keyboard. To use it, inject its constructor as
+ * factory into the {@link org.chromium.chrome.browser.ChromeWindow} before launching an activity.
+ * To reset, call {@link ChromeWindow#resetKeyboardVisibilityDelegateFactory()}.
+ * <pre>E.g.{@code
+ *    // To force a keyboard open.
+ *    ChromeWindow.setKeyboardVisibilityDelegateFactory(FakeKeyboard::new);
+ *    aTestRule.startMainActivityOnBlankPage();
+ *    ChromeWindow.resetKeyboardVisibilityDelegateFactory();
+ *    aTestRule.getKeyboardDelegate().showKeyboard();  // No delay/waiting necessary.
+ *  }</pre>
+ */
+public class FakeKeyboard extends ChromeKeyboardVisibilityDelegate {
+    private static final int KEYBOARD_HEIGHT_DP = 234;
+    private boolean mIsShowing;
+
+    public FakeKeyboard(WeakReference<Activity> activity) {
+        super(activity);
+    }
+
+    private int getStaticKeyboardHeight() {
+        return (int) getActivity().getResources().getDisplayMetrics().density * KEYBOARD_HEIGHT_DP;
+    }
+
+    @Override
+    protected boolean isAndroidSoftKeyboardShowing(Context context, View view) {
+        return mIsShowing;
+    }
+
+    @Override
+    public void showKeyboard(View view) {
+        boolean keyboardWasVisible = isKeyboardShowing(getActivity(), view);
+        mIsShowing = true;
+        runOnUiThreadBlocking(() -> {
+            if (!keyboardWasVisible) notifyListeners(mIsShowing);
+            // Pretend a layout change for components listening to the activity directly:
+            View contentView = getActivity().findViewById(android.R.id.content);
+            ViewGroup.LayoutParams p = contentView.getLayoutParams();
+            p.height = p.height - getStaticKeyboardHeight();
+            contentView.setLayoutParams(p);
+        });
+    }
+
+    @Override
+    protected boolean hideAndroidSoftKeyboard(View view) {
+        boolean keyboardWasVisible = isKeyboardShowing(getActivity(), view);
+        mIsShowing = false;
+        runOnUiThreadBlocking(() -> {
+            if (keyboardWasVisible) notifyListeners(mIsShowing);
+            // Pretend a layout change for components listening to the activity directly:
+            View contentView = getActivity().findViewById(android.R.id.content);
+            ViewGroup.LayoutParams p = contentView.getLayoutParams();
+            p.height = p.height + getStaticKeyboardHeight();
+            contentView.setLayoutParams(p);
+        });
+        return keyboardWasVisible;
+    }
+
+    @Override
+    public int calculateKeyboardHeight(View rootView) {
+        return mIsShowing ? getStaticKeyboardHeight() : 0;
+    }
+
+    @Override
+    public int calculateKeyboardDetectionThreshold(Context context, View rootView) {
+        return 0;
+    }
+
+    /**
+     * Creates an inset observer view calculating the bottom inset based on the fake keyboard.
+     * @param context Context used to instantiate this view.
+     * @return a {@link InsetObserverView}
+     */
+    InsetObserverView createInsetObserver(Context context) {
+        return new InsetObserverView(context) {
+            @Override
+            public int getSystemWindowInsetsBottom() {
+                return mIsShowing ? getStaticKeyboardHeight() : 0;
+            }
+        };
+    }
+}

chrome/android/javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/ManualFillingIntegrationTest.java

@@ -383,7 +383,7 @@ public class ManualFillingIntegrationTest {
     @Test
     @SmallTest
     public void testInfobarStaysHiddenWhenOpeningSheet()
-            throws InterruptedException, TimeoutException {
+            throws InterruptedException, TimeoutException, ExecutionException {
         mHelper.loadTestPage(false);
 
         InfoBarTestAnimationListener listener = new InfoBarTestAnimationListener();
@@ -413,7 +413,11 @@ public class ManualFillingIntegrationTest {
         // Reopen the keyboard, then close it.
         whenDisplayed(withId(R.id.tabs)).perform(selectTabAtPosition(0));
         mHelper.waitForKeyboard();
-        mActivityTestRule.getKeyboardDelegate().hideKeyboard(null);
+        ThreadUtils.runOnUiThreadBlocking(() -> {
+            mActivityTestRule.getKeyboardDelegate().hideKeyboard(
+                    mActivityTestRule.getActivity().getCurrentFocus());
+            mActivityTestRule.getInfoBarContainer().requestLayout();
+        });
 
         mHelper.waitToBeHidden(withId(R.id.keyboard_accessory_sheet));
         mHelper.waitToBeHidden(withId(R.id.keyboard_accessory));

chrome/android/javatests/src/org/chromium/chrome/browser/autofill/keyboard_accessory/ManualFillingTestHelper.java

@@ -17,9 +17,8 @@ import static org.chromium.chrome.test.util.ViewUtils.VIEW_NULL;
 import static org.chromium.chrome.test.util.ViewUtils.waitForView;
 import static org.chromium.ui.base.LocalizationUtils.setRtlForTesting;
 
-import android.content.Context;
+import android.app.Activity;
 import android.support.design.widget.TabLayout;
-import android.support.test.InstrumentationRegistry;
 import android.support.test.espresso.PerformException;
 import android.support.test.espresso.UiController;
 import android.support.test.espresso.ViewAction;
@@ -34,7 +33,7 @@ import org.chromium.base.ThreadUtils;
 import org.chromium.base.test.util.UrlUtils;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeTabbedActivity;
-import org.chromium.chrome.browser.InsetObserverView;
+import org.chromium.chrome.browser.ChromeWindow;
 import org.chromium.chrome.test.ChromeTabbedActivityTestRule;
 import org.chromium.content_public.browser.ImeAdapter;
 import org.chromium.content_public.browser.WebContents;
@@ -43,7 +42,6 @@ import org.chromium.content_public.browser.test.util.CriteriaHelper;
 import org.chromium.content_public.browser.test.util.DOMUtils;
 import org.chromium.content_public.browser.test.util.TestInputMethodManagerWrapper;
 import org.chromium.ui.DropdownPopupWindowInterface;
-import org.chromium.ui.KeyboardVisibilityDelegate;
 
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;
@@ -57,66 +55,16 @@ public class ManualFillingTestHelper {
     private final AtomicReference<WebContents> mWebContentsRef = new AtomicReference<>();
     private TestInputMethodManagerWrapper mInputMethodManagerWrapper;
 
-    private class FakeKeyboard extends KeyboardVisibilityDelegate {
-        static final int KEYBOARD_HEIGHT = 234;
-
-        private boolean mIsShowing;
-
-        @Override
-        public void showKeyboard(View view) {
-            mIsShowing = true;
-            ThreadUtils.runOnUiThreadBlocking(() -> {
-                mActivityTestRule.getActivity()
-                        .getManualFillingController()
-                        .getMediatorForTesting()
-                        .onKeyboardVisibilityChanged(mIsShowing);
-            });
-        }
-
-        @Override
-        public boolean hideKeyboard(View view) {
-            boolean keyboardWasVisible = mIsShowing;
-            mIsShowing = false;
-            ThreadUtils.runOnUiThreadBlocking(() -> {
-                mActivityTestRule.getActivity()
-                        .getManualFillingController()
-                        .getMediatorForTesting()
-                        .onKeyboardVisibilityChanged(mIsShowing);
-            });
-            return keyboardWasVisible;
-        }
-
-        @Override
-        public int calculateKeyboardHeight(Context context, View rootView) {
-            return mIsShowing ? KEYBOARD_HEIGHT : 0;
-        }
-
-        @Override
-        protected int calculateKeyboardDetectionThreshold(Context context, View rootView) {
-            return 0;
-        }
-
-        /**
-         * Creates an inset observer view calculating the bottom inset based on the fake keyboard.
-         * @param context Context used to instantiate this view.
-         * @return a {@link InsetObserverView}
-         */
-        InsetObserverView createInsetObserver(Context context) {
-            return new InsetObserverView(context) {
-                @Override
-                public int getSystemWindowInsetsBottom() {
-                    return mIsShowing ? KEYBOARD_HEIGHT : 0;
-                }
-            };
-        }
+    public FakeKeyboard getKeyboard() {
+        return (FakeKeyboard) mActivityTestRule.getKeyboardDelegate();
     }
-    private final FakeKeyboard mKeyboard = new FakeKeyboard();
 
     ManualFillingTestHelper(ChromeTabbedActivityTestRule activityTestRule) {
         mActivityTestRule = activityTestRule;
     }
 
     public void loadTestPage(boolean isRtl) throws InterruptedException {
+        ChromeWindow.setKeyboardVisibilityDelegateFactory(FakeKeyboard::new);
         mActivityTestRule.startMainActivityWithURL(UrlUtils.encodeHtmlDataUri("<html"
                 + (isRtl ? " dir=\"rtl\"" : "") + "><head>"
                 + "<meta name=\"viewport\""
@@ -128,14 +76,14 @@ public class ManualFillingTestHelper {
                 + "</form></body></html>"));
         setRtlForTesting(isRtl);
         ThreadUtils.runOnUiThreadBlocking(() -> {
-            ChromeTabbedActivity activity = mActivityTestRule.getActivity();
+            ChromeTabbedActivity activity = (ChromeTabbedActivity) mActivityTestRule.getActivity();
             mWebContentsRef.set(activity.getActivityTab().getWebContents());
             activity.getManualFillingController()
                     .getMediatorForTesting()
-                    .setInsetObserverViewSupplier(() -> {
-                        return mKeyboard.createInsetObserver(
-                                activity.getInsetObserverView().getContext());
-                    });
+                    .setInsetObserverViewSupplier(
+                            ()
+                                    -> getKeyboard().createInsetObserver(
+                                            activity.getInsetObserverView().getContext()));
             // The TestInputMethodManagerWrapper intercepts showSoftInput so that a keyboard is
             // never brought up.
             final ImeAdapter imeAdapter = ImeAdapter.fromWebContents(mWebContentsRef.get());
@@ -143,32 +91,31 @@ public class ManualFillingTestHelper {
             imeAdapter.setInputMethodManagerWrapper(mInputMethodManagerWrapper);
         });
         DOMUtils.waitForNonZeroNodeBounds(mWebContentsRef.get(), "password");
-        KeyboardVisibilityDelegate.setDelegateForTesting(mKeyboard); // Use a fake keyboard.
     }
+
     public void clear() {
-        KeyboardVisibilityDelegate.clearDelegateForTesting();
+        ChromeWindow.resetKeyboardVisibilityDelegateFactory();
     }
 
     public void waitForKeyboard() {
         CriteriaHelper.pollUiThread(() -> {
-            return mActivityTestRule.getKeyboardDelegate().isKeyboardShowing(
-                    InstrumentationRegistry.getContext(),
-                    mActivityTestRule.getActivity().getCurrentFocus());
+            Activity activity = mActivityTestRule.getActivity();
+            return getKeyboard().isAndroidSoftKeyboardShowing(activity, activity.getCurrentFocus());
         });
     }
 
     public void waitForKeyboardToDisappear() {
-        CriteriaHelper.pollUiThread(
-                ()
-                        -> !KeyboardVisibilityDelegate.getInstance().isKeyboardShowing(
-                                InstrumentationRegistry.getContext(),
-                                mActivityTestRule.getActivity().getCurrentFocus()));
+        CriteriaHelper.pollUiThread(() -> {
+            Activity activity = mActivityTestRule.getActivity();
+            return !getKeyboard().isAndroidSoftKeyboardShowing(
+                    activity, activity.getCurrentFocus());
+        });
     }
 
     public void clickPasswordField() throws TimeoutException, InterruptedException {
         DOMUtils.clickNode(mWebContentsRef.get(), "password");
         requestShowKeyboardAccessory();
-        mKeyboard.showKeyboard(null);
+        getKeyboard().showKeyboard(mActivityTestRule.getActivity().getCurrentFocus());
     }
 
     public void clickEmailField(boolean forceAccessory)
@@ -179,7 +126,7 @@ public class ManualFillingTestHelper {
         } else {
             requestHideKeyboardAccessory();
         }
-        mKeyboard.showKeyboard(null);
+        getKeyboard().showKeyboard(mActivityTestRule.getActivity().getCurrentFocus());
     }
 
     public DropdownPopupWindowInterface waitForAutofillPopup(String filterInput)
@@ -222,7 +169,7 @@ public class ManualFillingTestHelper {
      */
     public void clickSubmit() throws TimeoutException, InterruptedException {
         DOMUtils.clickNode(mWebContentsRef.get(), "submit");
-        mKeyboard.hideKeyboard(null);
+        getKeyboard().hideAndroidSoftKeyboard(null);
     }
 
     /**
@@ -264,7 +211,7 @@ public class ManualFillingTestHelper {
                             .withCause(new Throwable("No tab at index " + tabIndex))
                             .build();
                 }
-                tabLayout.getTabAt(tabIndex).select();
+                ThreadUtils.runOnUiThread(() -> tabLayout.getTabAt(tabIndex).select());
             }
         };
     }

chrome/android/junit/src/org/chromium/chrome/browser/autofill/keyboard_accessory/ManualFillingControllerTest.java

@@ -55,6 +55,7 @@ import org.chromium.chrome.test.util.browser.Features;
 import org.chromium.chrome.test.util.browser.Features.DisableFeatures;
 import org.chromium.chrome.test.util.browser.Features.EnableFeatures;
 import org.chromium.chrome.test.util.browser.modelutil.FakeViewProvider;
+import org.chromium.ui.KeyboardVisibilityDelegate;
 import org.chromium.ui.base.WindowAndroid;
 
 import java.lang.ref.WeakReference;
@@ -71,6 +72,8 @@ public class ManualFillingControllerTest {
     @Mock
     private WindowAndroid mMockWindow;
     @Mock
+    private KeyboardVisibilityDelegate mMockKeyboard;
+    @Mock
     private ChromeActivity mMockActivity;
     @Mock
     private KeyboardAccessoryView mMockKeyboardAccessoryView;
@@ -99,6 +102,7 @@ public class ManualFillingControllerTest {
         ShadowRecordHistogram.reset();
         MockitoAnnotations.initMocks(this);
         when(mMockWindow.getActivity()).thenReturn(new WeakReference<>(mMockActivity));
+        when(mMockWindow.getKeyboardDelegate()).thenReturn(mMockKeyboard);
         when(mMockActivity.getTabModelSelector()).thenReturn(mMockTabModelSelector);
         ChromeFullscreenManager fullscreenManager = new ChromeFullscreenManager(mMockActivity, 0);
         when(mMockActivity.getFullscreenManager()).thenReturn(fullscreenManager);

ui/android/BUILD.gn

@@ -260,6 +260,7 @@ android_library("ui_full_java") {
     "java/src/org/chromium/ui/ViewProvider.java",
     "java/src/org/chromium/ui/VSyncMonitor.java",
     "java/src/org/chromium/ui/base/ActivityAndroidPermissionDelegate.java",
+    "java/src/org/chromium/ui/base/ActivityKeyboardVisibilityDelegate.java",
     "java/src/org/chromium/ui/base/ActivityWindowAndroid.java",
     "java/src/org/chromium/ui/base/AndroidPermissionDelegate.java",
     "java/src/org/chromium/ui/base/Clipboard.java",

ui/android/java/src/org/chromium/ui/KeyboardVisibilityDelegate.java

@@ -15,7 +15,7 @@ import android.view.WindowInsets;
 import android.view.inputmethod.InputMethodManager;
 
 import org.chromium.base.Log;
-import org.chromium.base.VisibleForTesting;
+import org.chromium.base.ObserverList;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -38,8 +38,21 @@ public class KeyboardVisibilityDelegate {
     /** The delegate to determine keyboard visibility. */
     private static KeyboardVisibilityDelegate sInstance = new KeyboardVisibilityDelegate();
 
-    /** Set this delegate to replace the keyboard in tests. */
-    private static KeyboardVisibilityDelegate sTestingInstance;
+    /**
+     * An interface to notify listeners of changes in the soft keyboard's visibility.
+     */
+    public interface KeyboardVisibilityListener {
+        /**
+         * Called whenever the keyboard might have changed.
+         * @param isShowing A boolean that's true if the keyboard is now visible.
+         */
+        void keyboardVisibilityChanged(boolean isShowing);
+    }
+    private final ObserverList<KeyboardVisibilityListener> mKeyboardVisibilityListeners =
+            new ObserverList<>();
+
+    protected void registerKeyboardVisibilityCallbacks() {}
+    protected void unregisterKeyboardVisibilityCallbacks() {}
 
     /**
      * Allows setting a new strategy to override the default {@link KeyboardVisibilityDelegate}.
@@ -52,31 +65,12 @@ public class KeyboardVisibilityDelegate {
         sInstance = delegate;
     }
 
-    /**
-     * Setting a test instance of the visibility delegate that won't affect the default instance.
-     *
-     * @param delegate A {@link KeyboardVisibilityDelegate} instance.
-     */
-    @VisibleForTesting
-    public static void setDelegateForTesting(KeyboardVisibilityDelegate delegate) {
-        sTestingInstance = delegate;
-    }
-
-    /**
-     * Clears any previously set test instance.
-     */
-    @VisibleForTesting
-    public static void clearDelegateForTesting() {
-        sTestingInstance = null;
-    }
-
     /**
      * Prefer using {@link org.chromium.ui.base.WindowAndroid#getKeyboardDelegate()} over this
      * method. Both return a delegate which allows checking and influencing the keyboard state.
      * @return the global {@link KeyboardVisibilityDelegate}.
      */
     public static KeyboardVisibilityDelegate getInstance() {
-        if (sTestingInstance != null) return sTestingInstance;
         return sInstance;
     }
 
@@ -121,11 +115,21 @@ public class KeyboardVisibilityDelegate {
     }
 
     /**
-     * Hides the soft keyboard by using the {@link Context#INPUT_METHOD_SERVICE}.
+     * Hides the soft keyboard.
      * @param view The {@link View} that is currently accepting input.
      * @return Whether the keyboard was visible before.
      */
     public boolean hideKeyboard(View view) {
+        return hideAndroidSoftKeyboard(view);
+    }
+
+    /**
+     * Hides the soft keyboard by using the {@link Context#INPUT_METHOD_SERVICE}.
+     * This template method simplifies mocking and the access to the soft keyboard in subclasses.
+     * @param view The {@link View} that is currently accepting input.
+     * @return Whether the keyboard was visible before.
+     */
+    protected boolean hideAndroidSoftKeyboard(View view) {
         InputMethodManager imm = (InputMethodManager) view.getContext().getSystemService(
                 Context.INPUT_METHOD_SERVICE);
         return imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
@@ -134,11 +138,10 @@ public class KeyboardVisibilityDelegate {
     /**
      * Calculates the keyboard height based on the bottom margin it causes for the given
      * rootView. It is used to determine whether the keyboard is visible.
-     * @param context A {@link Context} instance.
      * @param rootView A {@link View}.
      * @return The size of the bottom margin which most likely is exactly the keyboard size.
      */
-    public int calculateKeyboardHeight(Context context, View rootView) {
+    public int calculateKeyboardHeight(View rootView) {
         Rect appRect = new Rect();
         rootView.getWindowVisibleDisplayFrame(appRect);
 
@@ -185,17 +188,61 @@ public class KeyboardVisibilityDelegate {
         return (int) (KEYBOARD_DETECT_BOTTOM_THRESHOLD_DP * density);
     }
 
+    /**
+     * Returns whether the keyboard is showing.
+     * @param context A {@link Context} instance.
+     * @param view    A {@link View}.
+     * @return        Whether or not the software keyboard is visible.
+     */
+    public boolean isKeyboardShowing(Context context, View view) {
+        return isAndroidSoftKeyboardShowing(context, view);
+    }
+
     /**
      * Detects whether or not the keyboard is showing. This is a best guess based on the height
      * of the keyboard as there is no standardized/foolproof way to do this.
+     * This template method simplifies mocking and the access to the soft keyboard in subclasses.
      * @param context A {@link Context} instance.
      * @param view    A {@link View}.
      * @return        Whether or not the software keyboard is visible.
      */
-    public boolean isKeyboardShowing(Context context, View view) {
+    protected boolean isAndroidSoftKeyboardShowing(Context context, View view) {
         View rootView = view.getRootView();
         return rootView != null
-                && calculateKeyboardHeight(context, rootView)
+                && calculateKeyboardHeight(rootView)
                 > calculateKeyboardDetectionThreshold(context, rootView);
     }
+
+    /**
+     * To be called when the keyboard visibility state might have changed. Informs listeners of the
+     * state change IFF there actually was a change.
+     * @param isShowing The current (guesstimated) state of the keyboard.
+     */
+    protected void notifyListeners(boolean isShowing) {
+        for (KeyboardVisibilityListener listener : mKeyboardVisibilityListeners) {
+            listener.keyboardVisibilityChanged(isShowing);
+        }
+    }
+
+    /**
+     * Adds a listener that is updated of keyboard visibility changes. This works as a best guess.
+     *
+     * @see org.chromium.ui.KeyboardVisibilityDelegate#isKeyboardShowing(Context, View)
+     */
+    public void addKeyboardVisibilityListener(KeyboardVisibilityListener listener) {
+        if (mKeyboardVisibilityListeners.isEmpty()) {
+            registerKeyboardVisibilityCallbacks();
+        }
+        mKeyboardVisibilityListeners.addObserver(listener);
+    }
+
+    /**
+     * @see #addKeyboardVisibilityListener(KeyboardVisibilityListener)
+     */
+    public void removeKeyboardVisibilityListener(KeyboardVisibilityListener listener) {
+        mKeyboardVisibilityListeners.removeObserver(listener);
+        if (mKeyboardVisibilityListeners.isEmpty()) {
+            unregisterKeyboardVisibilityCallbacks();
+        }
+    }
 }

ui/android/java/src/org/chromium/ui/base/ActivityKeyboardVisibilityDelegate.java

+// Copyright 2018 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.ui.base;
+
+import android.app.Activity;
+import android.support.annotation.Nullable;
+import android.view.View;
+
+import org.chromium.ui.KeyboardVisibilityDelegate;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * A {@link KeyboardVisibilityDelegate} that listens to a given activity for layout changes. It
+ * notifies {@link KeyboardVisibilityDelegate.KeyboardVisibilityListener} whenever the layout change
+ * is suspected to be caused by a keyboard.
+ */
+public class ActivityKeyboardVisibilityDelegate
+        extends KeyboardVisibilityDelegate implements View.OnLayoutChangeListener {
+    private boolean mIsKeyboardShowing;
+    private WeakReference<Activity> mActivity;
+
+    /**
+     * Creates a new delegate listening to the given activity. If the activity is destroyed, it will
+     * continue to work as a regular {@link KeyboardVisibilityDelegate}.
+     * @param activity A {@link WeakReference} to an {@link Activity}.
+     */
+    public ActivityKeyboardVisibilityDelegate(WeakReference<Activity> activity) {
+        mActivity = activity;
+    }
+
+    public @Nullable Activity getActivity() {
+        return mActivity.get();
+    }
+
+    @Override
+    public void registerKeyboardVisibilityCallbacks() {
+        Activity activity = getActivity();
+        if (activity == null) return;
+        View content = activity.findViewById(android.R.id.content);
+        mIsKeyboardShowing = isKeyboardShowing(activity, content);
+        content.addOnLayoutChangeListener(this);
+    }
+
+    @Override
+    public void unregisterKeyboardVisibilityCallbacks() {
+        Activity activity = getActivity();
+        if (activity == null) return;
+        activity.findViewById(android.R.id.content).removeOnLayoutChangeListener(this);
+    }
+
+    @Override
+    public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
+            int oldTop, int oldRight, int oldBottom) {
+        Activity activity = getActivity();
+        if (activity == null) return;
+        boolean isShowing = isKeyboardShowing(activity, v);
+        if (mIsKeyboardShowing == isShowing) return;
+        mIsKeyboardShowing = isShowing;
+        notifyListeners(isShowing);
+    }
+}
\ No newline at end of file

ui/android/java/src/org/chromium/ui/base/ActivityWindowAndroid.java

@@ -10,7 +10,6 @@ import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentSender.SendIntentException;
-import android.view.View;
 
 import org.chromium.base.ActivityState;
 import org.chromium.base.ApplicationStatus;
@@ -25,8 +24,7 @@ import java.lang.ref.WeakReference;
  * Only instantiate this class when you need the implemented features.
  */
 public class ActivityWindowAndroid
-        extends WindowAndroid
-        implements ApplicationStatus.ActivityStateListener, View.OnLayoutChangeListener {
+        extends WindowAndroid implements ApplicationStatus.ActivityStateListener {
     // Constants used for intent request code bounding.
     private static final int REQUEST_CODE_PREFIX = 1000;
     private static final int REQUEST_CODE_RANGE_SIZE = 100;
@@ -61,6 +59,7 @@ public class ActivityWindowAndroid
             ApplicationStatus.registerStateListenerForActivity(this, activity);
         }
 
+        setKeyboardDelegate(createKeyboardVisibilityDelegate());
         setAndroidPermissionDelegate(createAndroidPermissionDelegate());
     }
 
@@ -68,20 +67,13 @@ public class ActivityWindowAndroid
         return new ActivityAndroidPermissionDelegate(getActivity());
     }
 
-    @Override
-    protected void registerKeyboardVisibilityCallbacks() {
-        Activity activity = getActivity().get();
-        if (activity == null) return;
-        View content = activity.findViewById(android.R.id.content);
-        mIsKeyboardShowing = getKeyboardDelegate().isKeyboardShowing(getActivity().get(), content);
-        content.addOnLayoutChangeListener(this);
+    protected ActivityKeyboardVisibilityDelegate createKeyboardVisibilityDelegate() {
+        return new ActivityKeyboardVisibilityDelegate(getActivity());
     }
 
     @Override
-    protected void unregisterKeyboardVisibilityCallbacks() {
-        Activity activity = getActivity().get();
-        if (activity == null) return;
-        activity.findViewById(android.R.id.content).removeOnLayoutChangeListener(this);
+    public ActivityKeyboardVisibilityDelegate getKeyboardDelegate() {
+        return (ActivityKeyboardVisibilityDelegate) super.getKeyboardDelegate();
     }
 
     @Override
@@ -167,7 +159,7 @@ public class ActivityWindowAndroid
 
     @Override
     public WeakReference<Activity> getActivity() {
-        return new WeakReference<Activity>(activityFromContext(getContext().get()));
+        return new WeakReference<>(activityFromContext(getContext().get()));
     }
 
     @Override
@@ -190,13 +182,6 @@ public class ActivityWindowAndroid
                                       : super.getActivityState();
     }
 
-    @Override
-    public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
-            int oldTop, int oldRight, int oldBottom) {
-        keyboardVisibilityPossiblyChanged(
-                getKeyboardDelegate().isKeyboardShowing(getActivity().get(), v));
-    }
-
     private int generateNextRequestCode() {
         int requestCode = REQUEST_CODE_PREFIX + mNextRequestCode;
         mNextRequestCode = (mNextRequestCode + 1) % REQUEST_CODE_RANGE_SIZE;

ui/android/java/src/org/chromium/ui/base/WindowAndroid.java

@@ -51,6 +51,8 @@ import java.util.HashSet;
 @JNINamespace("ui")
 public class WindowAndroid implements AndroidPermissionDelegate {
     private static final String TAG = "WindowAndroid";
+    private KeyboardVisibilityDelegate mKeyboardVisibilityDelegate =
+            KeyboardVisibilityDelegate.getInstance();
 
     @TargetApi(Build.VERSION_CODES.KITKAT)
     private class TouchExplorationMonitor {
@@ -100,8 +102,6 @@ public class WindowAndroid implements AndroidPermissionDelegate {
     private HashSet<Animator> mAnimationsOverContent = new HashSet<>();
     private View mAnimationPlaceholderView;
 
-    protected boolean mIsKeyboardShowing;
-
     // System accessibility service.
     private final AccessibilityManager mAccessibilityManager;
 
@@ -118,15 +118,6 @@ public class WindowAndroid implements AndroidPermissionDelegate {
     private boolean mPendingVSyncRequest;
     private boolean mVSyncPaused;
 
-    /**
-     * An interface to notify listeners of changes in the soft keyboard's visibility.
-     */
-    public interface KeyboardVisibilityListener {
-        public void keyboardVisibilityChanged(boolean isShowing);
-    }
-    private ObserverList<KeyboardVisibilityListener> mKeyboardVisibilityListeners =
-            new ObserverList<>();
-
     /**
      * An interface to notify listeners that a context menu is closed.
      */
@@ -691,40 +682,19 @@ public class WindowAndroid implements AndroidPermissionDelegate {
         }
     }
 
-    protected void registerKeyboardVisibilityCallbacks() {
-    }
-
-    protected void unregisterKeyboardVisibilityCallbacks() {
-    }
-
-    /**
-     * Adds a listener that is updated of keyboard visibility changes. This works as a best guess.
-     *
-     * @see org.chromium.ui.KeyboardVisibilityDelegate#isKeyboardShowing(Context, View)
-     */
-    public void addKeyboardVisibilityListener(KeyboardVisibilityListener listener) {
-        if (mKeyboardVisibilityListeners.isEmpty()) {
-            registerKeyboardVisibilityCallbacks();
-        }
-        mKeyboardVisibilityListeners.addObserver(listener);
-    }
-
-    /**
-     * @see #addKeyboardVisibilityListener(KeyboardVisibilityListener)
-     */
-    public void removeKeyboardVisibilityListener(KeyboardVisibilityListener listener) {
-        mKeyboardVisibilityListeners.removeObserver(listener);
-        if (mKeyboardVisibilityListeners.isEmpty()) {
-            unregisterKeyboardVisibilityCallbacks();
-        }
-    }
-
     /**
      * The returned {@link KeyboardVisibilityDelegate} can read and influence the soft keyboard.
      * @return a {@link KeyboardVisibilityDelegate} specific for this window.
      */
     public KeyboardVisibilityDelegate getKeyboardDelegate() {
-        return KeyboardVisibilityDelegate.getInstance();
+        return mKeyboardVisibilityDelegate;
+    }
+
+    @VisibleForTesting
+    public void setKeyboardDelegate(KeyboardVisibilityDelegate keyboardDelegate) {
+        mKeyboardVisibilityDelegate = keyboardDelegate;
+        // TODO(fhorschig): Remove - every caller should use the window to get the delegate.
+        KeyboardVisibilityDelegate.setInstance(keyboardDelegate);
     }
 
     /**
@@ -753,20 +723,6 @@ public class WindowAndroid implements AndroidPermissionDelegate {
         }
     }
 
-    /**
-     * To be called when the keyboard visibility state might have changed. Informs listeners of the
-     * state change IFF there actually was a change.
-     * @param isShowing The current (guesstimated) state of the keyboard.
-     */
-    protected void keyboardVisibilityPossiblyChanged(boolean isShowing) {
-        if (mIsKeyboardShowing == isShowing) return;
-        mIsKeyboardShowing = isShowing;
-
-        for (KeyboardVisibilityListener listener : mKeyboardVisibilityListeners) {
-            listener.keyboardVisibilityChanged(isShowing);
-        }
-    }
-
     /**
      * Start a post-layout animation on top of web content.
      *