Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/widget/findinpage/FindToolbarManager.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.widget.findinpage;
+
+import android.app.Activity;
+import android.view.ActionMode;
+import android.view.View;
+import android.view.ViewStub;
+
+import org.chromium.base.ObserverList;
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.ui.base.DeviceFormFactor;
+
+/**
+ * Manages the interactions with the find toolbar.
+ */
+public class FindToolbarManager {
+    private FindToolbar mFindToolbar;
+    private final Activity mActivity;
+    private final TabModelSelector mTabModelSelector;
+    private final ActionMode.Callback mCallback;
+    private final ObserverList<FindToolbarObserver> mObservers;
+
+    /**
+     * Creates an instance of a {@link FindToolbarManager}.
+     * @param activity An Activity that represents a parent of the {@link android.view.ViewStub}.
+     * @param selector The {@link TabModelSelector} that will interact with the {@link FindToolbar}.
+     * @param callback The ActionMode.Callback that will be used when selection occurs on the
+     *         {@link FindToolbar}.
+     */
+    public FindToolbarManager(
+            Activity activity, TabModelSelector selector, ActionMode.Callback callback) {
+        mActivity = activity;
+        mTabModelSelector = selector;
+        mCallback = callback;
+        mObservers = new ObserverList<FindToolbarObserver>();
+    }
+
+    /**
+     * @return Whether the find toolbar is currently showing.
+     */
+    public boolean isShowing() {
+        return mFindToolbar != null && mFindToolbar.getVisibility() == View.VISIBLE;
+    }
+
+    /**
+     * Hides the toolbar.
+     */
+    public void hideToolbar() {
+        if (mFindToolbar == null) return;
+
+        mFindToolbar.deactivate();
+    }
+
+    /**
+     * Shows the toolbar if it's not already visible otherwise activates.
+     */
+    public void showToolbar() {
+        if (mFindToolbar == null) {
+            int stubId = com.google.android.apps.chrome.R.id.find_toolbar_stub;
+            if (DeviceFormFactor.isTablet(mActivity)) {
+                stubId = com.google.android.apps.chrome.R.id.find_toolbar_tablet_stub;
+            }
+            mFindToolbar = (FindToolbar) ((ViewStub) mActivity.findViewById(stubId)).inflate();
+            mFindToolbar.setTabModelSelector(mTabModelSelector);
+            mFindToolbar.setActionModeCallbackForTextEdit(mCallback);
+            mFindToolbar.setObserver(new FindToolbarObserver() {
+                @Override
+                public void onFindToolbarShown() {
+                    for (FindToolbarObserver observer : mObservers) {
+                        observer.onFindToolbarShown();
+                    }
+                }
+
+                @Override
+                public void onFindToolbarHidden() {
+                    for (FindToolbarObserver observer : mObservers) {
+                        observer.onFindToolbarHidden();
+                    }
+                }
+            });
+        }
+
+        mFindToolbar.activate();
+    }
+
+    /**
+     * Add an observer for find in page changes.
+     */
+    public void addObserver(FindToolbarObserver observer) {
+        mObservers.addObserver(observer);
+    }
+
+    /**
+     * Remove an observer for find in page changes.
+     */
+    public void removeObserver(FindToolbarObserver observer) {
+        mObservers.removeObserver(observer);
+    }
+}