chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerToolbar.java

// 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.history;

import android.content.Context;
import android.util.AttributeSet;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import org.chromium.base.VisibleForTesting;
import org.chromium.chrome.R;
import org.chromium.chrome.browser.ChromeFeatureList;
import org.chromium.chrome.browser.preferences.Pref;
import org.chromium.chrome.browser.preferences.PrefServiceBridge;
import org.chromium.chrome.browser.widget.selection.SelectableListToolbar;

import java.util.List;

/**
 * The SelectionToolbar for the browsing history UI.
 */
public class HistoryManagerToolbar extends SelectableListToolbar<HistoryItem> {
    private HistoryManager mManager;

    public HistoryManagerToolbar(Context context, AttributeSet attrs) {
        super(context, attrs);
        inflateMenu(R.menu.history_manager_menu);

        getMenu()
                .findItem(R.id.selection_mode_open_in_incognito)
                .setTitle(ChromeFeatureList.isEnabled(ChromeFeatureList.INCOGNITO_STRINGS)
                                ? R.string.contextmenu_open_in_private_tab
                                : R.string.contextmenu_open_in_incognito_tab);

        updateMenuItemVisibility();
    }

    /**
     * @param manager The {@link HistoryManager} associated with this toolbar.
     */
    public void setManager(HistoryManager manager) {
        mManager = manager;

        if (!mManager.isDisplayedInSeparateActivity()) {
            getMenu().removeItem(R.id.close_menu_id);
        }
    }

    @Override
    protected void showNormalView() {
        super.showNormalView();
        updateInfoMenuItem(
                mManager.shouldShowInfoButton(), mManager.shouldShowInfoHeaderIfAvailable());
    }

    @Override
    public void onSelectionStateChange(List<HistoryItem> selectedItems) {
        boolean wasSelectionEnabled = mIsSelectionEnabled;
        super.onSelectionStateChange(selectedItems);

        if (mIsSelectionEnabled) {
            int numSelected = mSelectionDelegate.getSelectedItems().size();

            // If the delete menu item is shown in the overflow menu instead of as an action, there
            // may not be a view associated with it.
            View deleteButton = findViewById(R.id.selection_mode_delete_menu_id);
            if (deleteButton != null) {
                deleteButton.setContentDescription(getResources().getQuantityString(
                        R.plurals.accessibility_remove_selected_items,
                        numSelected, numSelected));
            }

            // The copy link option should only be visible when one item is selected.
            getItemById(R.id.selection_mode_copy_link).setVisible(numSelected == 1);

            if (!wasSelectionEnabled) {
                mManager.recordUserActionWithOptionalSearch("SelectionEstablished");
            }
        }
    }

    @Override
    protected void onDataChanged(int numItems) {
        super.onDataChanged(numItems);
        updateInfoMenuItem(
                mManager.shouldShowInfoButton(), mManager.shouldShowInfoHeaderIfAvailable());
    }

    /**
     * Should be called when the user's sign in state changes.
     */
    public void onSignInStateChange() {
        updateMenuItemVisibility();
        updateInfoMenuItem(
                mManager.shouldShowInfoButton(), mManager.shouldShowInfoHeaderIfAvailable());
    }

    private void updateMenuItemVisibility() {
        // Once the selection mode delete or incognito menu options are removed, they will not
        // be added back until the user refreshes the history UI. This could happen if the user is
        // signed in to an account that cannot remove browsing history or has incognito disabled and
        // signs out.
        if (!PrefServiceBridge.getInstance().getBoolean(Pref.ALLOW_DELETING_BROWSER_HISTORY)) {
            getMenu().removeItem(R.id.selection_mode_delete_menu_id);
        }
        if (!PrefServiceBridge.getInstance().isIncognitoModeEnabled()) {
            getMenu().removeItem(R.id.selection_mode_open_in_incognito);
        }
    }

    @VisibleForTesting
    MenuItem getItemById(int menuItemId) {
        Menu menu = getMenu();
        for (int i = 0; i < menu.size(); i++) {
            MenuItem item = menu.getItem(i);
            if (item.getItemId() == menuItemId) return item;
        }
        return null;
    }

    @VisibleForTesting
    Menu getMenuForTests() {
        return getMenu();
    }
}