Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/RecentTabsManager.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/RecentTabsManager.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/RecentTabsManager.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/RecentTabsManager.java
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+// 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.ntp;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+
+import org.chromium.base.ObserverList;
+import org.chromium.chrome.browser.ForeignSessionHelper;
+import org.chromium.chrome.browser.ForeignSessionHelper.ForeignSession;
+import org.chromium.chrome.browser.ForeignSessionHelper.ForeignSessionCallback;
+import org.chromium.chrome.browser.ForeignSessionHelper.ForeignSessionTab;
+import org.chromium.chrome.browser.NewTabPagePrefs;
+import org.chromium.chrome.browser.RecentlyClosedBridge;
+import org.chromium.chrome.browser.RecentlyClosedBridge.RecentlyClosedCallback;
+import org.chromium.chrome.browser.RecentlyClosedBridge.RecentlyClosedTab;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.favicon.FaviconHelper;
+import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
+import org.chromium.chrome.browser.ntp.RecentTabsPromoView.SyncPromoModel;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.browser.signin.SigninManager;
+import org.chromium.chrome.browser.signin.SigninManager.SignInStateObserver;
+import org.chromium.chrome.browser.sync.SyncController;
+import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.sync.AndroidSyncSettings;
+import org.chromium.sync.AndroidSyncSettings.AndroidSyncSettingsObserver;
+import org.chromium.sync.signin.ChromeSigninController;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Provides the domain logic and data for RecentTabsPage and RecentTabsRowAdapter.
+ */
+public class RecentTabsManager implements AndroidSyncSettingsObserver, SignInStateObserver,
+        SyncPromoModel {
+
+    /**
+     * Implement this to receive updates when the page contents change.
+     */
+    interface UpdatedCallback {
+        /**
+         * Called when the list of recently closed tabs or foreign sessions changes.
+         */
+        void onUpdated();
+    }
+
+    private static final int RECENTLY_CLOSED_MAX_TAB_COUNT = 5;
+
+    private final Profile mProfile;
+    private final Tab mTab;
+    private final Context mContext;
+    private final ObserverList<AndroidSyncSettingsObserver> mObservers =
+            new ObserverList<AndroidSyncSettingsObserver>();
+
+    private FaviconHelper mFaviconHelper;
+    private ForeignSessionHelper mForeignSessionHelper;
+    private List<ForeignSession> mForeignSessions;
+    private List<RecentlyClosedTab> mRecentlyClosedTabs;
+    private NewTabPagePrefs mNewTabPagePrefs;
+    private RecentlyClosedBridge mRecentlyClosedBridge;
+    private SigninManager mSignInManager;
+    private UpdatedCallback mUpdatedCallback;
+
+    /**
+     * Create an RecentTabsManager to be used with RecentTabsPage and RecentTabsRowAdapter.
+     *
+     * @param tab The Tab that is showing this recent tabs page.
+     * @param profile Profile that is associated with the current session.
+     * @param context the Android context this manager will work in.
+     */
+    public RecentTabsManager(Tab tab, Profile profile, Context context) {
+        mProfile = profile;
+        mTab = tab;
+        mForeignSessionHelper = buildForeignSessionHelper(mProfile);
+        mNewTabPagePrefs = buildNewTabPagePrefs(mProfile);
+        mFaviconHelper = buildFaviconHelper();
+        mRecentlyClosedBridge = buildRecentlyClosedBridge(mProfile);
+        mSignInManager = SigninManager.get(context);
+        mContext = context;
+
+        updateRecentlyClosedTabs();
+        registerForForeignSessionUpdates();
+        updateForeignSessions();
+        mForeignSessionHelper.triggerSessionSync();
+        registerForSignInAndSyncNotifications();
+    }
+
+    /**
+     * Should be called when this object is no longer needed. Performs necessary listener tear down.
+     */
+    public void destroy() {
+        AndroidSyncSettings.unregisterObserver(mContext, this);
+
+        mSignInManager.removeSignInStateObserver(this);
+        mSignInManager = null;
+
+        mFaviconHelper.destroy();
+        mFaviconHelper = null;
+
+        mRecentlyClosedBridge.destroy();
+        mRecentlyClosedBridge = null;
+
+        mForeignSessionHelper.destroy();
+        mForeignSessionHelper = null;
+
+        mUpdatedCallback = null;
+
+        mNewTabPagePrefs.destroy();
+        mNewTabPagePrefs = null;
+    }
+
+    private static ForeignSessionHelper buildForeignSessionHelper(Profile profile) {
+        return new ForeignSessionHelper(profile);
+    }
+
+    private static NewTabPagePrefs buildNewTabPagePrefs(Profile profile) {
+        return new NewTabPagePrefs(profile);
+    }
+
+    private static FaviconHelper buildFaviconHelper() {
+        return new FaviconHelper();
+    }
+
+    private RecentlyClosedBridge buildRecentlyClosedBridge(Profile profile) {
+        RecentlyClosedBridge bridge = new RecentlyClosedBridge(profile);
+        bridge.setRecentlyClosedCallback(new RecentlyClosedCallback() {
+            @Override
+            public void onUpdated() {
+                updateRecentlyClosedTabs();
+                postUpdate();
+            }
+        });
+        return bridge;
+    }
+
+    private void registerForForeignSessionUpdates() {
+        mForeignSessionHelper.setOnForeignSessionCallback(new ForeignSessionCallback() {
+            @Override
+            public void onUpdated() {
+                updateForeignSessions();
+                postUpdate();
+            }
+        });
+    }
+
+    private void registerForSignInAndSyncNotifications() {
+        AndroidSyncSettings.registerObserver(mContext, this);
+        mSignInManager.addSignInStateObserver(this);
+    }
+
+    protected void updateCurrentlyOpenTabs() {
+    }
+
+    private void updateRecentlyClosedTabs() {
+        mRecentlyClosedTabs = mRecentlyClosedBridge.getRecentlyClosedTabs(
+                RECENTLY_CLOSED_MAX_TAB_COUNT);
+    }
+
+    private void updateForeignSessions() {
+        mForeignSessions = mForeignSessionHelper.getForeignSessions();
+        if (mForeignSessions == null) {
+            mForeignSessions = Collections.emptyList();
+        }
+    }
+
+    /**
+     * @return Most up-to-date list of currently open tabs.
+     */
+    public List<CurrentlyOpenTab> getCurrentlyOpenTabs() {
+        return null;
+    }
+
+    /**
+     * @return Most up-to-date list of foreign sessions.
+     */
+    public List<ForeignSession> getForeignSessions() {
+        return mForeignSessions;
+    }
+
+    /**
+     * @return Most up-to-date list of recently closed tabs.
+     */
+    public List<RecentlyClosedTab> getRecentlyClosedTabs() {
+        return mRecentlyClosedTabs;
+    }
+
+    /**
+     * Opens a new tab navigating to ForeignSessionTab.
+     *
+     * @param session The foreign session that the tab belongs to.
+     * @param tab The tab to open.
+     * @param windowDisposition The WindowOpenDisposition flag.
+     */
+    public void openForeignSessionTab(ForeignSession session, ForeignSessionTab tab,
+            int windowDisposition) {
+        NewTabPageUma.recordAction(NewTabPageUma.ACTION_OPENED_FOREIGN_SESSION);
+        mForeignSessionHelper.openForeignSessionTab(mTab, session, tab, windowDisposition);
+    }
+
+    /**
+     * Restores a recently closed tab.
+     *
+     * @param tab The tab to open.
+     * @param windowDisposition The WindowOpenDisposition value specifying whether the tab should
+     *         be restored into the current tab or a new tab.
+     */
+    public void openRecentlyClosedTab(RecentlyClosedTab tab, int windowDisposition) {
+        NewTabPageUma.recordAction(NewTabPageUma.ACTION_OPENED_RECENTLY_CLOSED_ENTRY);
+        mRecentlyClosedBridge.openRecentlyClosedTab(mTab, tab, windowDisposition);
+    }
+
+    /**
+     * Opens the history page.
+     */
+    public void openHistoryPage() {
+        mTab.loadUrl(new LoadUrlParams(UrlConstants.HISTORY_URL));
+    }
+
+    /**
+     * Returns a 16x16 favicon for a given synced url.
+     *
+     * @param url The url to fetch the favicon for.
+     * @return 16x16 favicon or null if favicon unavailable.
+     */
+    public Bitmap getSyncedFaviconImageForURL(String url) {
+        return mFaviconHelper.getSyncedFaviconImageForURL(mProfile, url);
+    }
+
+    /**
+     * Fetches a favicon for snapshot document url which is returned via callback.
+     *
+     * @param url The url to fetch a favicon for.
+     * @param size the desired favicon size.
+     * @param faviconCallback the callback to be invoked when the favicon is available.
+     *
+     * @return may return false if we could not fetch the favicon.
+     */
+    public boolean getLocalFaviconForUrl(String url, int size,
+            FaviconImageCallback faviconCallback) {
+        return mFaviconHelper.getLocalFaviconImageForURL(mProfile, url,
+                FaviconHelper.FAVICON | FaviconHelper.TOUCH_ICON
+                        | FaviconHelper.TOUCH_PRECOMPOSED_ICON,
+                size, faviconCallback);
+    }
+
+    /**
+     * Sets a callback to be invoked when recently closed tabs or foreign sessions documents have
+     * been updated.
+     *
+     * @param updatedCallback the listener to be invoked.
+     */
+    public void setUpdatedCallback(UpdatedCallback updatedCallback) {
+        mUpdatedCallback = updatedCallback;
+    }
+
+    /**
+     * Sets the persistent expanded/collapsed state of the currently open tabs list.
+     *
+     * @param isCollapsed Whether the currently open tabs list is collapsed.
+     */
+    public void setCurrentlyOpenTabsCollapsed(boolean isCollapsed) {
+        mNewTabPagePrefs.setCurrentlyOpenTabsCollapsed(isCollapsed);
+    }
+
+    /**
+     * Determine the expanded/collapsed state of the currently open tabs list.
+     *
+     * @return Whether the currently open tabs list is collapsed.
+     */
+    public boolean isCurrentlyOpenTabsCollapsed() {
+        return mNewTabPagePrefs.getCurrentlyOpenTabsCollapsed();
+    }
+
+    /**
+     * Sets the state for showing all tabs in the currently open tabs list. This is intended to
+     * be overridden in extending classes and set to true when the user clicks the "More" button
+     * at the end of the list.
+     * @param showingAll Whether the currently open tabs list should start to show all.
+     */
+    public void setCurrentlyOpenTabsShowAll(boolean showingAll) {
+    }
+
+    /**
+     * @return Whether the currently open tabs group shows all tabs. If it is not, only a limited
+     * number of tabs is shown with a "More" button at the end of the list to show all.
+     */
+    public boolean isCurrentlyOpenTabsShowingAll() {
+        return false;
+    }
+
+    /**
+     * Sets the persistent expanded/collapsed state of a foreign session list.
+     *
+     * @param session foreign session to collapsed.
+     * @param isCollapsed Whether the session is collapsed or expanded.
+     */
+    public void setForeignSessionCollapsed(ForeignSession session, boolean isCollapsed) {
+        mNewTabPagePrefs.setForeignSessionCollapsed(session, isCollapsed);
+    }
+
+    /**
+     * Determine the expanded/collapsed state of a foreign session list.
+     *
+     * @param session foreign session whose state to obtain.
+     *
+     * @return Whether the session is collapsed.
+     */
+    public boolean getForeignSessionCollapsed(ForeignSession session) {
+        return mNewTabPagePrefs.getForeignSessionCollapsed(session);
+    }
+
+    /**
+     * Sets the persistent expanded/collapsed state of the recently closed tabs list.
+     *
+     * @param isCollapsed Whether the recently closed tabs list is collapsed.
+     */
+    public void setRecentlyClosedTabsCollapsed(boolean isCollapsed) {
+        mNewTabPagePrefs.setRecentlyClosedTabsCollapsed(isCollapsed);
+    }
+
+    /**
+     * Determine the expanded/collapsed state of the recently closed tabs list.
+     *
+     * @return Whether the recently closed tabs list is collapsed.
+     */
+    public boolean isRecentlyClosedTabsCollapsed() {
+        return mNewTabPagePrefs.getRecentlyClosedTabsCollapsed();
+    }
+
+   /**
+     * Remove Foreign session to display. Note that it might reappear during the next sync if the
+     * session is not orphaned.
+     *
+     * This is mainly for when user wants to delete an orphaned session.
+     * @param session Session to be deleted.
+     */
+    public void deleteForeignSession(ForeignSession session) {
+        mForeignSessionHelper.deleteForeignSession(session);
+    }
+
+    /**
+     * Clears the list of recently closed tabs.
+     */
+    public void clearRecentlyClosedTabs() {
+        mRecentlyClosedBridge.clearRecentlyClosedTabs();
+    }
+
+    /**
+     * Determine whether the sync promo needs to be displayed.
+     *
+     * @return Whether sync promo should be displayed.
+     */
+    public boolean shouldDisplaySyncPromo() {
+        if (SigninManager.get(mContext).isSigninDisabledByPolicy()) {
+            return false;
+        }
+
+        return !AndroidSyncSettings.isSyncEnabled(mContext) || mForeignSessions.isEmpty();
+    }
+
+    /**
+     * Collapse the sync promo.
+     *
+     * @param isCollapsed Whether the sync promo is collapsed.
+     */
+    public void setSyncPromoCollapsed(boolean isCollapsed) {
+        mNewTabPagePrefs.setSyncPromoCollapsed(isCollapsed);
+    }
+
+    /**
+     * Determine whether the sync promo is collapsed.
+     *
+     * @return Whether the sync promo is collapsed.
+     */
+    public boolean isSyncPromoCollapsed() {
+        return mNewTabPagePrefs.getSyncPromoCollapsed();
+    }
+
+    protected void postUpdate() {
+        if (mUpdatedCallback != null) {
+            mUpdatedCallback.onUpdated();
+        }
+    }
+
+    // SignInStateObserver
+    @Override
+    public void onSignedIn() {
+        androidSyncSettingsChanged();
+    }
+
+    @Override
+    public void onSignedOut() {
+        androidSyncSettingsChanged();
+    }
+
+    // AndroidSyncSettingsObserver
+    @Override
+    public void androidSyncSettingsChanged() {
+        updateForeignSessions();
+        postUpdate();
+        for (AndroidSyncSettingsObserver observer : mObservers) {
+            observer.androidSyncSettingsChanged();
+        }
+    }
+
+    // SyncPromoModel
+    @Override
+    public boolean isSyncEnabled() {
+        return AndroidSyncSettings.isSyncEnabled(mContext);
+    }
+
+    @Override
+    public boolean isSignedIn() {
+        return ChromeSigninController.get(mContext).isSignedIn();
+    }
+
+    @Override
+    public void enableSync() {
+        SyncController.get(mContext).start();
+    }
+
+    @Override
+    public void registerForSyncUpdates(AndroidSyncSettingsObserver changeListener) {
+        mObservers.addObserver(changeListener);
+    }
+
+    @Override
+    public void unregisterForSyncUpdates(AndroidSyncSettingsObserver changeListener) {
+        mObservers.removeObserver(changeListener);
+    }
+}