Merge "Add accessibility actions to the drag-and-drop locale list" into nyc-dev

        android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"

        android:layout_gravity="center_vertical"

        android:src="@drawable/drag_handle"

        android:importantForAccessibility="no"

        android:layout_alignParentEnd="true"

        android:layout_alignTop="@id/checkbox"

        android:layout_alignBottom="@id/checkbox"/>

    <item type="id" name="lock_password" />

    <item type="id" name="encrypt_dont_require_password" />

    <!-- Used for custom accessibility actions in the Drag-and-Drop locale list -->

    <item type="id" name="action_drag_move_up" />

    <item type="id" name="action_drag_move_down" />

    <item type="id" name="action_drag_move_top" />

    <item type="id" name="action_drag_move_bottom" />

    <item type="id" name="action_drag_remove" />

</resources>

    <!-- This text shows in the language picker when the system is not translated into that languages [CHAR LIMIT=80] -->

    <string name="locale_not_translated">May not be available in some apps</string>

    <!-- Label for an accessibility action that moves a language up in the ordered language list [CHAR LIMIT=20] -->

    <string name="action_drag_label_move_up">Move up</string>

    <!-- Label for an accessibility action that moves a language down in the ordered language list [CHAR LIMIT=20] -->

    <string name="action_drag_label_move_down">Move down</string>

    <!-- Label for an accessibility action that moves a language to the top of the ordered language list [CHAR LIMIT=20] -->

    <string name="action_drag_label_move_top">Move to top</string>

    <!-- Label for an accessibility action that moves a language to the bottom of the ordered language list [CHAR LIMIT=20] -->

    <string name="action_drag_label_move_bottom">Move to bottom</string>

    <!-- Label for an accessibility action that removes the currently selected language from the the ordered language list [CHAR LIMIT=20] -->

    <string name="action_drag_label_remove">Remove language</string>

    <!-- The title of the dialog to pick an activity.  This is shown when there are multiple activities that can do a particular action.  For example, suppose you click on the "Share" menu item in the Browser.  Since you can share the webpage URL via many communication methods, this dialog would come up with choices like "Email", "IM", etc.  This is a generic message, and the previous example is a single possible scenario (so please don't assume it's for the browser or anything :) ). -->

    <string name="activity_picker_label">Choose activity</string>

    <!-- Do not translate. -->

import java.text.NumberFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Locale;

        return itemCount;

    }

    private void onItemMove(int fromPosition, int toPosition) {

    void onItemMove(int fromPosition, int toPosition) {

        if (fromPosition >= 0 && toPosition >= 0) {

            Collections.swap(mFeedItemList, fromPosition, toPosition);

            final LocaleStore.LocaleInfo saved = mFeedItemList.get(fromPosition);

            mFeedItemList.remove(fromPosition);

            mFeedItemList.add(toPosition, saved);

        } else {

            // TODO: It looks like sometimes the RecycleView tries to swap item -1

            // Investigate and file a bug.

            // I did not see it in a while, but if it happens, investigate and file a bug.

            Log.e(TAG, String.format(Locale.US,

                    "Negative position in onItemMove %d -> %d", fromPosition, toPosition));

        }

        }

    }

    boolean isRemoveMode() {

        return mRemoveMode;

    }

    void removeItem(int position) {

        int itemCount = mFeedItemList.size();

        if (itemCount <= 1) {

            return;

        }

        if (position < 0 || position >= itemCount) {

            return;

        }

        mFeedItemList.remove(position);

        notifyDataSetChanged();

        doTheUpdate();

    }

    void removeChecked() {

        int itemCount = mFeedItemList.size();

        for (int i = itemCount - 1; i >= 0; i--) {

/*

 * Copyright (C) 2016 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.settings.localepicker;

import android.content.Context;

import android.os.Bundle;

import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.view.View;

import com.android.settings.R;

/**

 * Add accessibility actions to the drag-and-drop locale list

 *

 * <p>Dragging is not supported neither by TalkBack or the accessibility

 * framework at the moment. So we need custom actions to be able

 * to change the order of the locales.</p>

 *

 * <p>Also, the remove functionality is difficult to discover and use

 * with TalkBack only, so we are also adding a "remove" action.</p>

 *

 * <p>It only removes one locale at the time, but most users don't

 * really add many locales "by mistake", so there is no real need

 * to delete a lot of locales at once.</p>

 */

public class LocaleLinearLayoutManager extends LinearLayoutManager {

    private final LocaleDragAndDropAdapter mAdapter;

    private final Context mContext;

    private final AccessibilityNodeInfoCompat.AccessibilityActionCompat mActionMoveUp;

    private final AccessibilityNodeInfoCompat.AccessibilityActionCompat mActionMoveDown;

    private final AccessibilityNodeInfoCompat.AccessibilityActionCompat mActionMoveTop;

    private final AccessibilityNodeInfoCompat.AccessibilityActionCompat mActionMoveBottom;

    private final AccessibilityNodeInfoCompat.AccessibilityActionCompat mActionRemove;

    public LocaleLinearLayoutManager(Context context, LocaleDragAndDropAdapter adapter) {

        super(context);

        this.mContext = context;

        this.mAdapter = adapter;

        this.mActionMoveUp = new AccessibilityNodeInfoCompat.AccessibilityActionCompat(

                R.id.action_drag_move_up,

                mContext.getString(R.string.action_drag_label_move_up));

        this.mActionMoveDown = new AccessibilityNodeInfoCompat.AccessibilityActionCompat(

                R.id.action_drag_move_down,

                mContext.getString(R.string.action_drag_label_move_down));

        this.mActionMoveTop = new AccessibilityNodeInfoCompat.AccessibilityActionCompat(

                R.id.action_drag_move_top,

                mContext.getString(R.string.action_drag_label_move_top));

        this.mActionMoveBottom = new AccessibilityNodeInfoCompat.AccessibilityActionCompat(

                R.id.action_drag_move_bottom,

                mContext.getString(R.string.action_drag_label_move_bottom));

        this.mActionRemove = new AccessibilityNodeInfoCompat.AccessibilityActionCompat(

                R.id.action_drag_remove,

                mContext.getString(R.string.action_drag_label_remove));

    }

    @Override

    public void onInitializeAccessibilityNodeInfoForItem(RecyclerView.Recycler recycler,

            RecyclerView.State state, View host, AccessibilityNodeInfoCompat info) {

        super.onInitializeAccessibilityNodeInfoForItem(recycler, state, host, info);

        final int itemCount = this.getItemCount();

        final int position = this.getPosition(host);

        final LocaleDragCell dragCell = (LocaleDragCell) host;

        // We want the description to be something not localizable, so that any TTS engine for

        // any language can handle it. And we want the position to be part of it.

        // So we use something like "2, French (France)"

        final String description =

                (position + 1) + ", " + dragCell.getCheckbox().getContentDescription();

        info.setContentDescription(description);

        if (mAdapter.isRemoveMode()) { // We don't move things around in remove mode

            return;

        }

        // The order in which we add the actions is important for the circular selection menu.

        // With the current order the "up" action will be (more or less) up, and "down" more

        // or less down ("more or less" because we have 5 actions)

        if (position > 0) { // it is not the first one

            info.addAction(mActionMoveUp);

            info.addAction(mActionMoveTop);

        }

        if (position + 1 < itemCount) { // it is not the last one

            info.addAction(mActionMoveDown);

            info.addAction(mActionMoveBottom);

        }

        if (itemCount > 1) {

            info.addAction(mActionRemove);

        }

    }

    @Override

    public boolean performAccessibilityActionForItem(RecyclerView.Recycler recycler,

            RecyclerView.State state, View host, int action, Bundle args) {

        final int itemCount = this.getItemCount();

        final int position = this.getPosition(host);

        switch (action) {

            case R.id.action_drag_move_up:

                if (position > 0) {

                    mAdapter.onItemMove(position, position - 1);

                    return true;

                }

                return false;

            case R.id.action_drag_move_down:

                if (position + 1 < itemCount) {

                    mAdapter.onItemMove(position, position + 1);

                    return true;

                }

                return false;

            case R.id.action_drag_move_top:

                if (position != 0) {

                    mAdapter.onItemMove(position, 0);

                    return true;

                }

                return false;

            case R.id.action_drag_move_bottom:

                if (position != itemCount - 1) {

                    mAdapter.onItemMove(position, itemCount - 1);

                    return true;

                }

                return false;

            case R.id.action_drag_remove:

                if (itemCount > 1) {

                    mAdapter.removeItem(position);

                    return true;

                }

                return false;

            default:

                return super.performAccessibilityActionForItem(recycler, state, host, action, args);

        }

    }

}