Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/dom_distiller/ReaderModeActivityDelegate.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.dom_distiller;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.widget.ReaderModeControl;
+import org.chromium.ui.resources.dynamics.DynamicResourceLoader;
+
+
+/**
+ * Manager for the Reader Mode feature.
+ * This class keeps track of the status of Reader Mode and coordinates the control
+ * with the layout.
+ */
+public class ReaderModeActivityDelegate {
+    private static final String TAG = "ReaderModeActivityDelegate";
+
+    private DynamicResourceLoader mResourceLoader;
+    private ReaderModeControl mControl;
+    private final ChromeActivity mActivity;
+    private ViewGroup mParentView;
+
+    /**
+     * Constructs the manager for the given activity, and will attach views to the given parent.
+     * @param activity             The {@code ChromeActivity} in use.
+     */
+    public ReaderModeActivityDelegate(ChromeActivity activity) {
+        mActivity = activity;
+    }
+
+    /**
+     * Initializes this manager.  Must be called before {@link #getReaderModeControl()}.
+     * @param parentView The parent view to attach Reader Mode UX to.
+     */
+    public void initialize(ViewGroup parentView) {
+        mParentView = parentView;
+    }
+
+    /**
+     * Destroys the Reader Mode activity delegate.
+     */
+    public void destroy() {
+        if (mControl != null) {
+            ((ViewGroup) mControl.getParent()).removeView(mControl);
+            mControl = null;
+            if (mResourceLoader != null) {
+                mResourceLoader.unregisterResource(R.id.contextual_search_view);
+            }
+        }
+        mParentView = null;
+    }
+
+    /**
+     * @param resourceLoader The {@link DynamicResourceLoader} to register and unregister the view.
+     */
+    public void setDynamicResourceLoader(DynamicResourceLoader resourceLoader) {
+        mResourceLoader = resourceLoader;
+        if (mControl != null) {
+            mResourceLoader.registerResource(R.id.reader_mode_view,
+                    mControl.getResourceAdapter());
+        }
+    }
+
+    /**
+     * Inflates the Reader Mode control, if needed.
+     */
+    public ReaderModeControl getReaderModeControl() {
+        assert mParentView != null;
+        if (mControl == null) {
+            LayoutInflater.from(mActivity).inflate(R.layout.reader_mode_control, mParentView);
+            mControl = (ReaderModeControl)
+                    mParentView.findViewById(R.id.reader_mode_view);
+            if (mResourceLoader != null) {
+                mResourceLoader.registerResource(R.id.reader_mode_view,
+                        mControl.getResourceAdapter());
+            }
+        }
+        assert mControl != null;
+        mControl.setVisibility(View.INVISIBLE);
+        return mControl;
+    }
+}