Add an experimental standalone content suggestions UI.

chrome/android/java/src/org/chromium/chrome/browser/suggestions/ContentSuggestionsActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/suggestions/ContentSuggestionsActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/ContentSuggestionsActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/ContentSuggestionsActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..677e711c9106a3856d63daec0281635a6ca2a4bf
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/ContentSuggestionsActivity.java
@@ -0,0 +1,196 @@
+// Copyright 2016 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.suggestions;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+
+import org.chromium.base.Callback;
+import org.chromium.base.ObserverList;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.ChromeFeatureList;
+import org.chromium.chrome.browser.SynchronousInitializationActivity;
+import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
+import org.chromium.chrome.browser.favicon.FaviconHelper.IconAvailabilityCallback;
+import org.chromium.chrome.browser.favicon.LargeIconBridge.LargeIconCallback;
+import org.chromium.chrome.browser.ntp.ContextMenuManager;
+import org.chromium.chrome.browser.ntp.LogoBridge.LogoObserver;
+import org.chromium.chrome.browser.ntp.MostVisitedItem;
+import org.chromium.chrome.browser.ntp.NewTabPage.DestructionObserver;
+import org.chromium.chrome.browser.ntp.NewTabPageView.NewTabPageManager;
+import org.chromium.chrome.browser.ntp.UiConfig;
+import org.chromium.chrome.browser.ntp.cards.NewTabPageAdapter;
+import org.chromium.chrome.browser.ntp.cards.NewTabPageRecyclerView;
+import org.chromium.chrome.browser.ntp.snippets.SnippetArticle;
+import org.chromium.chrome.browser.ntp.snippets.SnippetsBridge;
+import org.chromium.chrome.browser.ntp.snippets.SuggestionsSource;
+import org.chromium.chrome.browser.offlinepages.OfflinePageBridge;
+import org.chromium.chrome.browser.profiles.MostVisitedSites.MostVisitedURLsObserver;
+import org.chromium.chrome.browser.profiles.Profile;
+
+import java.util.Set;
+
+/**
+ * Experimental activity to show content suggestions outside of the New Tab Page.
+ */
+public class ContentSuggestionsActivity extends SynchronousInitializationActivity {
+    private final ObserverList<DestructionObserver> mDestructionObservers = new ObserverList<>();
+
+    private ContextMenuManager mContextMenuManager;
+    private SnippetsBridge mSnippetsBridge;
+    private NewTabPageRecyclerView mRecyclerView;
+
+    public static void launch(Context context) {
+        Intent intent = new Intent();
+        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        intent.setClass(context, ContentSuggestionsActivity.class);
+        context.startActivity(intent);
+    }
+
+    private class SuggestionsNewTabPageManager implements NewTabPageManager {

[dgn, 2017/01/04 12:19:43]

We'll have to split this in another CL. A bunch of methods make no sense here.

[Bernhard Bauer, 2017/01/05 12:02:15]

Yesssss

+        @Override
+        public void removeMostVisitedItem(MostVisitedItem item) {}
+
+        @Override
+        public void openMostVisitedItem(int windowDisposition, MostVisitedItem item) {}
+
+        @Override
+        public boolean isLocationBarShownInNTP() {
+            return false;
+        }
+
+        @Override
+        public boolean isVoiceSearchEnabled() {
+            return false;
+        }
+
+        @Override
+        public boolean isFakeOmniboxTextEnabledTablet() {
+            return false;
+        }
+
+        @Override
+        public boolean isOpenInNewWindowEnabled() {
+            return true;
+        }
+
+        @Override
+        public boolean isOpenInIncognitoEnabled() {
+            return true;
+        }
+
+        @Override
+        public void navigateToBookmarks() {}
+
+        @Override
+        public void navigateToRecentTabs() {}
+
+        @Override
+        public void navigateToDownloadManager() {}
+
+        @Override
+        public void trackSnippetsPageImpression(int[] categories, int[] suggestionsPerCategory) {}
+
+        @Override
+        public void trackSnippetImpression(SnippetArticle article) {}
+
+        @Override
+        public void trackSnippetMenuOpened(SnippetArticle article) {}
+
+        @Override
+        public void trackSnippetCategoryActionImpression(int category, int position) {}
+
+        @Override
+        public void trackSnippetCategoryActionClick(int category, int position) {}
+
+        @Override
+        public void openSnippet(int windowOpenDisposition, SnippetArticle article) {}
+
+        @Override
+        public void focusSearchBox(boolean beginVoiceSearch, String pastedText) {}
+
+        @Override
+        public void setMostVisitedURLsObserver(MostVisitedURLsObserver observer, int numResults) {}
+
+        @Override
+        public void getLocalFaviconImageForURL(
+                String url, int size, FaviconImageCallback faviconCallback) {}
+
+        @Override
+        public void getLargeIconForUrl(String url, int size, LargeIconCallback callback) {}
+
+        @Override
+        public void ensureIconIsAvailable(String pageUrl, String iconUrl, boolean isLargeIcon,
+                boolean isTemporary, IconAvailabilityCallback callback) {}
+
+        @Override
+        public void getUrlsAvailableOffline(Set<String> pageUrls, Callback<Set<String>> callback) {}
+
+        @Override
+        public void onLogoClicked(boolean isAnimatedLogoShowing) {}
+
+        @Override
+        public void getSearchProviderLogo(LogoObserver logoObserver) {}
+
+        @Override
+        public void onLoadingComplete(MostVisitedItem[] mostVisitedItems) {}
+
+        @Override
+        public void onLearnMoreClicked() {}
+
+        @Override
+        public SuggestionsSource getSuggestionsSource() {
+            return mSnippetsBridge;
+        }
+
+        @Override
+        public void addDestructionObserver(DestructionObserver destructionObserver) {
+            mDestructionObservers.addObserver(destructionObserver);
+        }
+
+        @Override
+        public boolean isCurrentPage() {
+            return true;
+        }
+
+        @Override
+        public ContextMenuManager getContextMenuManager() {
+            return mContextMenuManager;
+        }
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        assert ChromeFeatureList.isEnabled(ChromeFeatureList.NTP_SUGGESTIONS_STANDALONE_UI);
+
+        mRecyclerView = (NewTabPageRecyclerView) LayoutInflater.from(this).inflate(
+                R.layout.new_tab_page_recycler_view, null, false);
+
+        Profile profile = Profile.getLastUsedProfile();
+        mSnippetsBridge = new SnippetsBridge(profile);
+
+        NewTabPageManager manager = new SuggestionsNewTabPageManager();
+        mContextMenuManager = new ContextMenuManager(manager, null, mRecyclerView);
+        UiConfig uiConfig = new UiConfig(mRecyclerView);
+        NewTabPageAdapter adapter = new NewTabPageAdapter(
+                manager, null, uiConfig, OfflinePageBridge.getForProfile(profile));
+        mRecyclerView.setAdapter(adapter);
+        mRecyclerView.setUpSwipeToDismiss();
+
+        setContentView(mRecyclerView);
+    }
+
+    @Override
+    protected void onDestroy() {
+        for (DestructionObserver observer : mDestructionObservers) {
+            observer.onDestroy();
+        }
+        super.onDestroy();
+    }
+}