[Home] Add a Chrome Home specific incognito NTP

chrome/android/java/src/org/chromium/chrome/browser/ntp/IncognitoBottomSheetContent.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/IncognitoBottomSheetContent.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/IncognitoBottomSheetContent.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/IncognitoBottomSheetContent.java
new file mode 100644
index 0000000000000000000000000000000000000000..465102ad91823eb8b74085ae819a8fc22f46e571
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/IncognitoBottomSheetContent.java
@@ -0,0 +1,85 @@
+// Copyright 2017 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.ntp;
+
+import android.app.Activity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewTreeObserver.OnScrollChangedListener;
+import android.widget.ScrollView;
+
+import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.help.HelpAndFeedback;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.browser.widget.FadingShadow;
+import org.chromium.chrome.browser.widget.FadingShadowView;
+import org.chromium.chrome.browser.widget.bottomsheet.BottomSheet.BottomSheetContent;
+import org.chromium.chrome.browser.widget.bottomsheet.BottomSheetContentController;
+
+/**
+ * Provides content to be displayed inside the Home tab of the bottom sheet in incognito mode.
+ */
+public class IncognitoBottomSheetContent implements BottomSheetContent {
+    private final View mView;
+    private final ScrollView mScrollView;
+
+    /**
+     * Constructs a new IncognitoBottomSheetContent.
+     * @param activity The {@link Activity} displaying this bottom sheet content.
+     */
+    public IncognitoBottomSheetContent(final Activity activity) {
+        LayoutInflater inflater = LayoutInflater.from(activity);
+        mView = inflater.inflate(R.layout.incognito_bottom_sheet_content, null);
+
+        View learnMore = mView.findViewById(R.id.learn_more);
+        learnMore.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                HelpAndFeedback.getInstance(activity).show(activity,
+                        activity.getString(R.string.help_context_incognito_learn_more),
+                        Profile.getLastUsedProfile(), null);
+            }
+        });
+
+        final FadingShadowView shadow = (FadingShadowView) mView.findViewById(R.id.shadow);
+        shadow.init(
+                ApiCompatibilityUtils.getColor(mView.getResources(), R.color.toolbar_shadow_color),
+                FadingShadow.POSITION_TOP);
+
+        mScrollView = (ScrollView) mView.findViewById(R.id.scroll_view);
+        mScrollView.getViewTreeObserver().addOnScrollChangedListener(new OnScrollChangedListener() {
+            @Override
+            public void onScrollChanged() {
+                boolean shadowVisible = mScrollView.canScrollVertically(-1);
+                shadow.setVisibility(shadowVisible ? View.VISIBLE : View.GONE);
+            }
+        });
+    }
+
+    @Override
+    public View getContentView() {
+        return mView;
+    }
+
+    @Override
+    public View getToolbarView() {
+        return null;
+    }
+
+    @Override
+    public int getVerticalScrollOffset() {
+        return mScrollView.getScrollY();
+    }
+
+    @Override
+    public void destroy() {}
+
+    @Override
+    public int getType() {
+        return BottomSheetContentController.TYPE_INCOGNITO_HOME;
+    }
+}