chrome/browser/history_clusters/java/src/org/chromium/chrome/browser/history_clusters/HistoryClustersMediator.java - ios-chromium-mirror - Git at Google

 // Copyright 2022 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.history_clusters;

 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.view.View;

 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.content.res.AppCompatResources;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;

 import org.chromium.base.CallbackController;
 import org.chromium.base.ContextUtils;
 import org.chromium.base.Function;
 import org.chromium.base.Promise;
 import org.chromium.base.supplier.Supplier;
 import org.chromium.chrome.browser.history_clusters.HistoryClustersItemProperties.ItemType;
 import org.chromium.chrome.browser.history_clusters.HistoryClustersToolbarProperties.QueryState;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.ui.favicon.FaviconUtils;
 import org.chromium.components.browser_ui.widget.RoundedIconGenerator;
 import org.chromium.components.browser_ui.widget.selectable_list.SelectableListToolbar.SearchDelegate;
 import org.chromium.components.embedder_support.util.UrlConstants;
 import org.chromium.components.favicon.LargeIconBridge;
 import org.chromium.components.search_engines.TemplateUrlService;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.ui.UiUtils;
 import org.chromium.ui.base.DeviceFormFactor;
 import org.chromium.ui.modelutil.MVCListAdapter.ListItem;
 import org.chromium.ui.modelutil.MVCListAdapter.ModelList;
 import org.chromium.ui.modelutil.PropertyModel;
 import org.chromium.url.GURL;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;

 class HistoryClustersMediator extends RecyclerView.OnScrollListener implements SearchDelegate {
     @VisibleForTesting

     // The number of items past the last visible one we want to have loaded at any give point.
     static final int REMAINING_ITEM_BUFFER_SIZE = 25;

     interface Clock {
         long currentTimeMillis();
     }

     private final HistoryClustersBridge mHistoryClustersBridge;
     private final Context mContext;
     private final Resources mResources;
     private final ModelList mModelList;
     private final PropertyModel mToolbarModel;
     private final RoundedIconGenerator mIconGenerator;
     private final LargeIconBridge mLargeIconBridge;
     private final int mFaviconSize;
     private final Supplier<Tab> mTabSupplier;
     private Promise<HistoryClustersResult> mPromise;
     private Supplier<Intent> mHistoryActivityIntentFactory;
     private final boolean mIsSeparateActivity;
     private Function<GURL, Intent> mOpenUrlIntentCreator;
     private CallbackController mCallbackController = new CallbackController();
     private Clock mClock;
     private final TemplateUrlService mTemplateUrlService;

     /**
      * Create a new HistoryClustersMediator.
      * @param historyClustersBridge Provider of history clusters data.
      * @param largeIconBridge Bridge for fetching site icons.
      * @param context Android context from which UI configuration should be derived.
      * @param resources Android resources object from which strings, colors etc. should be fetched.
      * @param modelList Model list to which fetched cluster data should be pushed to.
      * @param toolbarModel Model for properties affecting the "full page" toolbar shown in the
      *         history activity.
      * @param historyActivityIntentFactory Supplier of an intent that targets the History activity.
      * @param tabSupplier Supplier of the currently active tab. Null in cases where there isn't a
      *         tab, e.g. when we're operating in a dedicated history activity.
      * @param isSeparateActivity Whether the Journeys UI this mediator supports is running in a
      *         separate activity (as opposed to in a tab). This informs, e.g. whether viewing a url
      *         should launch an intent or directly navigate a tab.
      * @param openUrlIntentCreator Function that creates an intent that opens the given url in the
      *         correct main browsing activity.
      * @param clock Provider of the current time in ms relative to the unix epoch.
      * @param templateUrlService Service that allows us to generate a URL for a given search query.
      */
     HistoryClustersMediator(@NonNull HistoryClustersBridge historyClustersBridge,
             LargeIconBridge largeIconBridge, @NonNull Context context, @NonNull Resources resources,
             @NonNull ModelList modelList, @NonNull PropertyModel toolbarModel,
             Supplier<Intent> historyActivityIntentFactory, @Nullable Supplier<Tab> tabSupplier,
             boolean isSeparateActivity, Function<GURL, Intent> openUrlIntentCreator, Clock clock,
             TemplateUrlService templateUrlService) {
         mHistoryClustersBridge = historyClustersBridge;
         mLargeIconBridge = largeIconBridge;
         mModelList = modelList;
         mContext = context;
         mResources = resources;
         mToolbarModel = toolbarModel;
         mHistoryActivityIntentFactory = historyActivityIntentFactory;
         mTabSupplier = tabSupplier;
         mFaviconSize = mResources.getDimensionPixelSize(R.dimen.default_favicon_min_size);
         mIconGenerator = FaviconUtils.createCircularIconGenerator(mContext);
         mIsSeparateActivity = isSeparateActivity;
         mOpenUrlIntentCreator = openUrlIntentCreator;
         mClock = clock;
         mTemplateUrlService = templateUrlService;
     }

     // SearchDelegate implementation.
     @Override
     public void onSearchTextChanged(String query) {
         mModelList.clear();
         startQuery(query);
     }

     @Override
     public void onEndSearch() {
         mModelList.clear();
         startQuery("");
     }

     // OnScrollListener implementation
     @Override
     public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
         LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
         if (layoutManager.findLastVisibleItemPosition()
                 > (mModelList.size() - REMAINING_ITEM_BUFFER_SIZE)) {
             mPromise.then(result -> {
                 if (result.canLoadMore()) {
                     continueQuery(result.getQuery());
                 }
             });
         }
     }

     void destroy() {
         mLargeIconBridge.destroy();
         mCallbackController.destroy();
     }

     void startSearch(String query) {
         mToolbarModel.set(HistoryClustersToolbarProperties.QUERY_STATE, QueryState.forQuery(query));
     }

     void startQuery(String query) {
         mPromise = mHistoryClustersBridge.queryClusters(query);
         mPromise.then(mCallbackController.makeCancelable(this::queryComplete));
     }

     void continueQuery(String query) {
         mPromise = mHistoryClustersBridge.loadMoreClusters(query);
         mPromise.then(mCallbackController.makeCancelable(this::queryComplete));
     }

     void openHistoryClustersUi(String query) {
         boolean isTablet = DeviceFormFactor.isNonMultiDisplayContextOnTablet(mContext);
         if (isTablet) {
             Tab currentTab = mTabSupplier.get();
             if (currentTab == null) return;
             Uri journeysUri =
                     new Uri.Builder()
                             .scheme(UrlConstants.CHROME_SCHEME)
                             .authority(UrlConstants.HISTORY_HOST)
                             .path(HistoryClustersConstants.JOURNEYS_PATH)
                             .appendQueryParameter(
                                     HistoryClustersConstants.HISTORY_CLUSTERS_QUERY_KEY, query)
                             .build();
             LoadUrlParams loadUrlParams = new LoadUrlParams(journeysUri.toString());
             currentTab.loadUrl(loadUrlParams);
             return;
         }

         Intent historyActivityIntent = mHistoryActivityIntentFactory.get();
         historyActivityIntent.putExtra(HistoryClustersConstants.EXTRA_SHOW_HISTORY_CLUSTERS, true);
         historyActivityIntent.putExtra(
                 HistoryClustersConstants.EXTRA_HISTORY_CLUSTERS_QUERY, query);
         mContext.startActivity(historyActivityIntent);
     }

     void onRelatedSearchesChipClicked(String searchQuery) {
         if (!mTemplateUrlService.isLoaded()) {
             return;
         }

         navigateToItemUrl(new GURL(mTemplateUrlService.getUrlForSearchQuery(searchQuery)));
     }

     private void queryComplete(HistoryClustersResult result) {
         boolean isQueryless = result.getQuery().isEmpty();
         if (isQueryless) {
             PropertyModel toggleModel = new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
             ListItem toggleItem = new ListItem(ItemType.TOGGLE, toggleModel);
             mModelList.add(toggleItem);
         }

         for (HistoryCluster cluster : result.getClusters()) {
             PropertyModel clusterModel = new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
             clusterModel.set(HistoryClustersItemProperties.TITLE, cluster.getLabel());
             Drawable journeysDrawable =
                     AppCompatResources.getDrawable(mContext, R.drawable.ic_journeys);
             clusterModel.set(HistoryClustersItemProperties.ICON_DRAWABLE, journeysDrawable);
             ListItem clusterItem = new ListItem(ItemType.CLUSTER, clusterModel);
             mModelList.add(clusterItem);
             if (isQueryless) {
                 clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
                         (v) -> startSearch(cluster.getLabel()));
                 clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, null);
                 clusterModel.set(HistoryClustersItemProperties.LABEL, null);
                 continue;
             }

             List<ListItem> visitsAndRelatedSearches =
                     new ArrayList<>(cluster.getVisits().size() + 1);
             for (ClusterVisit visit : cluster.getVisits()) {
                 PropertyModel visitModel =
                         new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
                 visitModel.set(HistoryClustersItemProperties.TITLE, visit.getTitle());
                 visitModel.set(HistoryClustersItemProperties.URL, visit.getGURL().getHost());
                 visitModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
                         (v) -> navigateToItemUrl(visit.getGURL()));
                 visitModel.set(HistoryClustersItemProperties.VISIBILITY, View.VISIBLE);
                 if (mLargeIconBridge != null) {
                     mLargeIconBridge.getLargeIconForUrl(visit.getGURL(), mFaviconSize,
                             (Bitmap icon, int fallbackColor, boolean isFallbackColorDefault,
                                     int iconType) -> {
                                 Drawable drawable = FaviconUtils.getIconDrawableWithoutFilter(icon,
                                         visit.getGURL(), fallbackColor, mIconGenerator, mResources,
                                         mFaviconSize);
                                 visitModel.set(
                                         HistoryClustersItemProperties.ICON_DRAWABLE, drawable);
                             });
                 }

                 visitsAndRelatedSearches.add(new ListItem(ItemType.VISIT, visitModel));
             }

             List<String> relatedSearches = cluster.getRelatedSearches();
             if (!relatedSearches.isEmpty()) {
                 PropertyModel relatedSearchesModel =
                         new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
                 relatedSearchesModel.set(
                         HistoryClustersItemProperties.RELATED_SEARCHES, relatedSearches);
                 relatedSearchesModel.set(HistoryClustersItemProperties.CHIP_CLICK_HANDLER,
                         this::onRelatedSearchesChipClicked);
                 ListItem relatedSearchesItem =
                         new ListItem(ItemType.RELATED_SEARCHES, relatedSearchesModel);
                 visitsAndRelatedSearches.add(relatedSearchesItem);
             }

             mModelList.addAll(visitsAndRelatedSearches);

             clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
                     v -> hideCluster(cluster, clusterModel, visitsAndRelatedSearches));
             Drawable chevron = UiUtils.getTintedDrawable(mContext,
                     R.drawable.ic_expand_more_black_24dp, R.color.default_icon_color_tint_list);
             clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, chevron);
             clusterModel.set(
                     HistoryClustersItemProperties.LABEL, getTimeString(cluster.getTimestamp()));
         }
     }

     @VisibleForTesting
     void hideCluster(
             HistoryCluster cluster, PropertyModel clusterModel, List<ListItem> itemsToHide) {
         clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
                 (v) -> showCluster(cluster, clusterModel, itemsToHide));
         Drawable chevron = UiUtils.getTintedDrawable(mContext, R.drawable.ic_expand_less_black_24dp,
                 R.color.default_icon_color_tint_list);
         clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, chevron);

         for (ListItem item : itemsToHide) {
             item.model.set(HistoryClustersItemProperties.VISIBILITY, View.GONE);
         }
     }

     @VisibleForTesting
     void showCluster(
             HistoryCluster cluster, PropertyModel clusterModel, List<ListItem> itemsToShow) {
         clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
                 (v) -> hideCluster(cluster, clusterModel, itemsToShow));
         Drawable chevron = UiUtils.getTintedDrawable(mContext, R.drawable.ic_expand_more_black_24dp,
                 R.color.default_icon_color_tint_list);
         clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, chevron);
         for (ListItem item : itemsToShow) {
             item.model.set(HistoryClustersItemProperties.VISIBILITY, View.VISIBLE);
         }
     }

     @VisibleForTesting
     void navigateToItemUrl(GURL gurl) {
         Context appContext = ContextUtils.getApplicationContext();
         if (mIsSeparateActivity) {
             appContext.startActivity(mOpenUrlIntentCreator.apply(gurl));
             return;
         }

         Tab currentTab = mTabSupplier.get();
         if (currentTab == null) return;

         LoadUrlParams loadUrlParams = new LoadUrlParams(gurl);
         currentTab.loadUrl(loadUrlParams);
     }

     @VisibleForTesting
     String getTimeString(long timestampMillis) {
         long timeDeltaMs = mClock.currentTimeMillis() - timestampMillis;
         if (timeDeltaMs < 0) timeDeltaMs = 0;

         int daysElapsed = (int) TimeUnit.MILLISECONDS.toDays(timeDeltaMs);
         int hoursElapsed = (int) TimeUnit.MILLISECONDS.toHours(timeDeltaMs);
         int minutesElapsed = (int) TimeUnit.MILLISECONDS.toMinutes(timeDeltaMs);

         if (daysElapsed > 0) {
             return mResources.getQuantityString(R.plurals.n_days_ago, daysElapsed, daysElapsed);
         } else if (hoursElapsed > 0) {
             return mResources.getQuantityString(R.plurals.n_hours_ago, hoursElapsed, hoursElapsed);
         } else if (minutesElapsed > 0) {
             return mResources.getQuantityString(
                     R.plurals.n_minutes_ago, minutesElapsed, minutesElapsed);
         } else {
             return mResources.getString(R.string.just_now);
         }
     }
 }
	// Copyright 2022 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.history_clusters;

	import android.content.Context;
	import android.content.Intent;
	import android.content.res.Resources;
	import android.graphics.Bitmap;
	import android.graphics.drawable.Drawable;
	import android.net.Uri;
	import android.view.View;

	import androidx.annotation.NonNull;
	import androidx.annotation.Nullable;
	import androidx.annotation.VisibleForTesting;
	import androidx.appcompat.content.res.AppCompatResources;
	import androidx.recyclerview.widget.LinearLayoutManager;
	import androidx.recyclerview.widget.RecyclerView;

	import org.chromium.base.CallbackController;
	import org.chromium.base.ContextUtils;
	import org.chromium.base.Function;
	import org.chromium.base.Promise;
	import org.chromium.base.supplier.Supplier;
	import org.chromium.chrome.browser.history_clusters.HistoryClustersItemProperties.ItemType;
	import org.chromium.chrome.browser.history_clusters.HistoryClustersToolbarProperties.QueryState;
	import org.chromium.chrome.browser.tab.Tab;
	import org.chromium.chrome.browser.ui.favicon.FaviconUtils;
	import org.chromium.components.browser_ui.widget.RoundedIconGenerator;
	import org.chromium.components.browser_ui.widget.selectable_list.SelectableListToolbar.SearchDelegate;
	import org.chromium.components.embedder_support.util.UrlConstants;
	import org.chromium.components.favicon.LargeIconBridge;
	import org.chromium.components.search_engines.TemplateUrlService;
	import org.chromium.content_public.browser.LoadUrlParams;
	import org.chromium.ui.UiUtils;
	import org.chromium.ui.base.DeviceFormFactor;
	import org.chromium.ui.modelutil.MVCListAdapter.ListItem;
	import org.chromium.ui.modelutil.MVCListAdapter.ModelList;
	import org.chromium.ui.modelutil.PropertyModel;
	import org.chromium.url.GURL;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.concurrent.TimeUnit;

	class HistoryClustersMediator extends RecyclerView.OnScrollListener implements SearchDelegate {
	@VisibleForTesting

	// The number of items past the last visible one we want to have loaded at any give point.
	static final int REMAINING_ITEM_BUFFER_SIZE = 25;

	interface Clock {
	long currentTimeMillis();
	}

	private final HistoryClustersBridge mHistoryClustersBridge;
	private final Context mContext;
	private final Resources mResources;
	private final ModelList mModelList;
	private final PropertyModel mToolbarModel;
	private final RoundedIconGenerator mIconGenerator;
	private final LargeIconBridge mLargeIconBridge;
	private final int mFaviconSize;
	private final Supplier<Tab> mTabSupplier;
	private Promise<HistoryClustersResult> mPromise;
	private Supplier<Intent> mHistoryActivityIntentFactory;
	private final boolean mIsSeparateActivity;
	private Function<GURL, Intent> mOpenUrlIntentCreator;
	private CallbackController mCallbackController = new CallbackController();
	private Clock mClock;
	private final TemplateUrlService mTemplateUrlService;

	/**
	* Create a new HistoryClustersMediator.
	* @param historyClustersBridge Provider of history clusters data.
	* @param largeIconBridge Bridge for fetching site icons.
	* @param context Android context from which UI configuration should be derived.
	* @param resources Android resources object from which strings, colors etc. should be fetched.
	* @param modelList Model list to which fetched cluster data should be pushed to.
	* @param toolbarModel Model for properties affecting the "full page" toolbar shown in the
	* history activity.
	* @param historyActivityIntentFactory Supplier of an intent that targets the History activity.
	* @param tabSupplier Supplier of the currently active tab. Null in cases where there isn't a
	* tab, e.g. when we're operating in a dedicated history activity.
	* @param isSeparateActivity Whether the Journeys UI this mediator supports is running in a
	* separate activity (as opposed to in a tab). This informs, e.g. whether viewing a url
	* should launch an intent or directly navigate a tab.
	* @param openUrlIntentCreator Function that creates an intent that opens the given url in the
	* correct main browsing activity.
	* @param clock Provider of the current time in ms relative to the unix epoch.
	* @param templateUrlService Service that allows us to generate a URL for a given search query.
	*/
	HistoryClustersMediator(@NonNull HistoryClustersBridge historyClustersBridge,
	LargeIconBridge largeIconBridge, @NonNull Context context, @NonNull Resources resources,
	@NonNull ModelList modelList, @NonNull PropertyModel toolbarModel,
	Supplier<Intent> historyActivityIntentFactory, @Nullable Supplier<Tab> tabSupplier,
	boolean isSeparateActivity, Function<GURL, Intent> openUrlIntentCreator, Clock clock,
	TemplateUrlService templateUrlService) {
	mHistoryClustersBridge = historyClustersBridge;
	mLargeIconBridge = largeIconBridge;
	mModelList = modelList;
	mContext = context;
	mResources = resources;
	mToolbarModel = toolbarModel;
	mHistoryActivityIntentFactory = historyActivityIntentFactory;
	mTabSupplier = tabSupplier;
	mFaviconSize = mResources.getDimensionPixelSize(R.dimen.default_favicon_min_size);
	mIconGenerator = FaviconUtils.createCircularIconGenerator(mContext);
	mIsSeparateActivity = isSeparateActivity;
	mOpenUrlIntentCreator = openUrlIntentCreator;
	mClock = clock;
	mTemplateUrlService = templateUrlService;
	}

	// SearchDelegate implementation.
	@Override
	public void onSearchTextChanged(String query) {
	mModelList.clear();
	startQuery(query);
	}

	@Override
	public void onEndSearch() {
	mModelList.clear();
	startQuery("");
	}

	// OnScrollListener implementation
	@Override
	public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
	LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
	if (layoutManager.findLastVisibleItemPosition()
	> (mModelList.size() - REMAINING_ITEM_BUFFER_SIZE)) {
	mPromise.then(result -> {
	if (result.canLoadMore()) {
	continueQuery(result.getQuery());
	}
	});
	}
	}

	void destroy() {
	mLargeIconBridge.destroy();
	mCallbackController.destroy();
	}

	void startSearch(String query) {
	mToolbarModel.set(HistoryClustersToolbarProperties.QUERY_STATE, QueryState.forQuery(query));
	}

	void startQuery(String query) {
	mPromise = mHistoryClustersBridge.queryClusters(query);
	mPromise.then(mCallbackController.makeCancelable(this::queryComplete));
	}

	void continueQuery(String query) {
	mPromise = mHistoryClustersBridge.loadMoreClusters(query);
	mPromise.then(mCallbackController.makeCancelable(this::queryComplete));
	}

	void openHistoryClustersUi(String query) {
	boolean isTablet = DeviceFormFactor.isNonMultiDisplayContextOnTablet(mContext);
	if (isTablet) {
	Tab currentTab = mTabSupplier.get();
	if (currentTab == null) return;
	Uri journeysUri =
	new Uri.Builder()
	.scheme(UrlConstants.CHROME_SCHEME)
	.authority(UrlConstants.HISTORY_HOST)
	.path(HistoryClustersConstants.JOURNEYS_PATH)
	.appendQueryParameter(
	HistoryClustersConstants.HISTORY_CLUSTERS_QUERY_KEY, query)
	.build();
	LoadUrlParams loadUrlParams = new LoadUrlParams(journeysUri.toString());
	currentTab.loadUrl(loadUrlParams);
	return;
	}

	Intent historyActivityIntent = mHistoryActivityIntentFactory.get();
	historyActivityIntent.putExtra(HistoryClustersConstants.EXTRA_SHOW_HISTORY_CLUSTERS, true);
	historyActivityIntent.putExtra(
	HistoryClustersConstants.EXTRA_HISTORY_CLUSTERS_QUERY, query);
	mContext.startActivity(historyActivityIntent);
	}

	void onRelatedSearchesChipClicked(String searchQuery) {
	if (!mTemplateUrlService.isLoaded()) {
	return;
	}

	navigateToItemUrl(new GURL(mTemplateUrlService.getUrlForSearchQuery(searchQuery)));
	}

	private void queryComplete(HistoryClustersResult result) {
	boolean isQueryless = result.getQuery().isEmpty();
	if (isQueryless) {
	PropertyModel toggleModel = new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
	ListItem toggleItem = new ListItem(ItemType.TOGGLE, toggleModel);
	mModelList.add(toggleItem);
	}

	for (HistoryCluster cluster : result.getClusters()) {
	PropertyModel clusterModel = new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
	clusterModel.set(HistoryClustersItemProperties.TITLE, cluster.getLabel());
	Drawable journeysDrawable =
	AppCompatResources.getDrawable(mContext, R.drawable.ic_journeys);
	clusterModel.set(HistoryClustersItemProperties.ICON_DRAWABLE, journeysDrawable);
	ListItem clusterItem = new ListItem(ItemType.CLUSTER, clusterModel);
	mModelList.add(clusterItem);
	if (isQueryless) {
	clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
	(v) -> startSearch(cluster.getLabel()));
	clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, null);
	clusterModel.set(HistoryClustersItemProperties.LABEL, null);
	continue;
	}

	List<ListItem> visitsAndRelatedSearches =
	new ArrayList<>(cluster.getVisits().size() + 1);
	for (ClusterVisit visit : cluster.getVisits()) {
	PropertyModel visitModel =
	new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
	visitModel.set(HistoryClustersItemProperties.TITLE, visit.getTitle());
	visitModel.set(HistoryClustersItemProperties.URL, visit.getGURL().getHost());
	visitModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
	(v) -> navigateToItemUrl(visit.getGURL()));
	visitModel.set(HistoryClustersItemProperties.VISIBILITY, View.VISIBLE);
	if (mLargeIconBridge != null) {
	mLargeIconBridge.getLargeIconForUrl(visit.getGURL(), mFaviconSize,
	(Bitmap icon, int fallbackColor, boolean isFallbackColorDefault,
	int iconType) -> {
	Drawable drawable = FaviconUtils.getIconDrawableWithoutFilter(icon,
	visit.getGURL(), fallbackColor, mIconGenerator, mResources,
	mFaviconSize);
	visitModel.set(
	HistoryClustersItemProperties.ICON_DRAWABLE, drawable);
	});
	}

	visitsAndRelatedSearches.add(new ListItem(ItemType.VISIT, visitModel));
	}

	List<String> relatedSearches = cluster.getRelatedSearches();
	if (!relatedSearches.isEmpty()) {
	PropertyModel relatedSearchesModel =
	new PropertyModel(HistoryClustersItemProperties.ALL_KEYS);
	relatedSearchesModel.set(
	HistoryClustersItemProperties.RELATED_SEARCHES, relatedSearches);
	relatedSearchesModel.set(HistoryClustersItemProperties.CHIP_CLICK_HANDLER,
	this::onRelatedSearchesChipClicked);
	ListItem relatedSearchesItem =
	new ListItem(ItemType.RELATED_SEARCHES, relatedSearchesModel);
	visitsAndRelatedSearches.add(relatedSearchesItem);
	}

	mModelList.addAll(visitsAndRelatedSearches);

	clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
	v -> hideCluster(cluster, clusterModel, visitsAndRelatedSearches));
	Drawable chevron = UiUtils.getTintedDrawable(mContext,
	R.drawable.ic_expand_more_black_24dp, R.color.default_icon_color_tint_list);
	clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, chevron);
	clusterModel.set(
	HistoryClustersItemProperties.LABEL, getTimeString(cluster.getTimestamp()));
	}
	}

	@VisibleForTesting
	void hideCluster(
	HistoryCluster cluster, PropertyModel clusterModel, List<ListItem> itemsToHide) {
	clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
	(v) -> showCluster(cluster, clusterModel, itemsToHide));
	Drawable chevron = UiUtils.getTintedDrawable(mContext, R.drawable.ic_expand_less_black_24dp,
	R.color.default_icon_color_tint_list);
	clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, chevron);

	for (ListItem item : itemsToHide) {
	item.model.set(HistoryClustersItemProperties.VISIBILITY, View.GONE);
	}
	}

	@VisibleForTesting
	void showCluster(
	HistoryCluster cluster, PropertyModel clusterModel, List<ListItem> itemsToShow) {
	clusterModel.set(HistoryClustersItemProperties.CLICK_HANDLER,
	(v) -> hideCluster(cluster, clusterModel, itemsToShow));
	Drawable chevron = UiUtils.getTintedDrawable(mContext, R.drawable.ic_expand_more_black_24dp,
	R.color.default_icon_color_tint_list);
	clusterModel.set(HistoryClustersItemProperties.END_BUTTON_DRAWABLE, chevron);
	for (ListItem item : itemsToShow) {
	item.model.set(HistoryClustersItemProperties.VISIBILITY, View.VISIBLE);
	}
	}

	@VisibleForTesting
	void navigateToItemUrl(GURL gurl) {
	Context appContext = ContextUtils.getApplicationContext();
	if (mIsSeparateActivity) {
	appContext.startActivity(mOpenUrlIntentCreator.apply(gurl));
	return;
	}

	Tab currentTab = mTabSupplier.get();
	if (currentTab == null) return;

	LoadUrlParams loadUrlParams = new LoadUrlParams(gurl);
	currentTab.loadUrl(loadUrlParams);
	}

	@VisibleForTesting
	String getTimeString(long timestampMillis) {
	long timeDeltaMs = mClock.currentTimeMillis() - timestampMillis;
	if (timeDeltaMs < 0) timeDeltaMs = 0;

	int daysElapsed = (int) TimeUnit.MILLISECONDS.toDays(timeDeltaMs);
	int hoursElapsed = (int) TimeUnit.MILLISECONDS.toHours(timeDeltaMs);
	int minutesElapsed = (int) TimeUnit.MILLISECONDS.toMinutes(timeDeltaMs);

	if (daysElapsed > 0) {
	return mResources.getQuantityString(R.plurals.n_days_ago, daysElapsed, daysElapsed);
	} else if (hoursElapsed > 0) {
	return mResources.getQuantityString(R.plurals.n_hours_ago, hoursElapsed, hoursElapsed);
	} else if (minutesElapsed > 0) {
	return mResources.getQuantityString(
	R.plurals.n_minutes_ago, minutesElapsed, minutesElapsed);
	} else {
	return mResources.getString(R.string.just_now);
	}
	}
	}