Add FeedbackReporter for reporting distillation quality.

chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/FeedbackReportingView.java

+// Copyright 2014 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.content.Context;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.ImageButton;
+
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.banners.SwipableOverlayView;
+import org.chromium.content.browser.ContentView;
+
+/**
+ * A view which displays a question to the user about the quality of distillation, where the user
+ * is given the option to respond.
+ *
+ * <p>The observer is called when the user makes a choice. After this point, it is not possible to
+ * interact with the view, and it is ready for dismissal. The selected option stays visibly
+ * selected.
+ */
+public class FeedbackReportingView extends SwipableOverlayView {
+    // XML layout for the BannerView.
+    private static final int VIEW_LAYOUT = R.layout.feedback_reporting_view;
+
+    // Class to alert about FeedbackReportingView events.
+    private FeedbackObserver mFeedbackObserver;
+
+    // The button to click for selecting 'No'.
+    private ImageButton mNoButton;
+
+    // The button to click for selecting 'Yes'.
+    private ImageButton mYesButton;
+
+    // Whether a selection has already been made, which means new events should be ignored.
+    private boolean mSelectionMade;
+
+    /**
+     * Called when the user makes a choice. After the call, it is not possible to interact further
+     * with the view.
+     */
+    interface FeedbackObserver {
+        void onYesPressed(FeedbackReportingView view);
+
+        void onNoPressed(FeedbackReportingView view);
+    }
+
+    /**
+     * Creates a FeedbackReportingView and adds it to the given ContentView.
+     *
+     * @param contentView      ContentView to display the FeedbackReportingView for.
+     * @param feedbackObserver Class that is alerted for FeedbackReportingView events.
+     * @return The created banner.
+     */
+    public static FeedbackReportingView create(ContentView contentView,
+                                               FeedbackObserver feedbackObserver) {
+        Context context = contentView.getContext().getApplicationContext();
+        FeedbackReportingView banner =
+                (FeedbackReportingView) LayoutInflater.from(context).inflate(VIEW_LAYOUT, null);
+        banner.initialize(feedbackObserver);
+        banner.addToView(contentView);
+        return banner;
+    }
+
+    /**
+     * Creates a FeedbackReportingView.
+     *
+     * @param context Context for acquiring resources.
+     * @param attrs   Attributes from the XML layout inflation.
+     */
+    public FeedbackReportingView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    private void initialize(FeedbackObserver feedbackObserver) {
+        mFeedbackObserver = feedbackObserver;
+        mNoButton = (ImageButton) findViewById(R.id.distillation_quality_answer_no);
+        mYesButton = (ImageButton) findViewById(R.id.distillation_quality_answer_yes);
+        mNoButton.setClickable(true);
+        mYesButton.setClickable(true);
+        mNoButton.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (mSelectionMade) return;
+                mSelectionMade = true;
+                mNoButton.setImageResource(R.drawable.distillation_quality_answer_no_pressed);
+                disableUI();
+                if (mFeedbackObserver != null) {
+                    mFeedbackObserver.onNoPressed(FeedbackReportingView.this);
+                }
+            }
+        });
+        mYesButton.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (mSelectionMade) return;
+                mSelectionMade = true;
+                mYesButton.setImageResource(R.drawable.distillation_quality_answer_yes_pressed);
+                disableUI();
+                if (mFeedbackObserver != null) {
+                    mFeedbackObserver.onYesPressed(FeedbackReportingView.this);
+                }
+            }
+        });
+    }
+
+    private void disableUI() {
+        // Clear OnClickListener to assure no more calls and that everything is cleaned up.
+        mNoButton.setOnClickListener(null);
+        mYesButton.setOnClickListener(null);
+
+        // Disable the buttons, so the images for highlighted/non-highlighted will not change if the
+        // user continues to tap the buttons while it is dismissing.
+        mNoButton.setEnabled(false);
+        mYesButton.setEnabled(false);
+    }
+
+    /**
+     * This is overridden since the method visibility is protected in the parent
+     * {@link SwipableOverlayView}. The
+     * {@link org.chromium.chrome.browser.dom_distiller.FeedbackReporter} needs to be able to
+     * dismiss this {@link org.chromium.chrome.browser.dom_distiller.FeedbackReportingView}, so by
+     * overriding this method in this class, it is callable from
+     * {@link org.chromium.chrome.browser.dom_distiller.FeedbackReporter}.
+     */
+    @Override
+    protected void dismiss() {
+        super.dismiss();
+    }
+
+    @Override
+    protected void onViewClicked() {
+    }
+
+    @Override
+    protected void onViewPressed(MotionEvent event) {
+    }
+}