| /* |
| * Copyright 2017, 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.managedprovisioning.common; |
| |
| import static android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction.ACTION_CLICK; |
| |
| import android.app.Activity; |
| import android.support.annotation.NonNull; |
| import android.support.annotation.Nullable; |
| import android.text.Spanned; |
| import android.text.style.ClickableSpan; |
| import android.view.ContextMenu; |
| import android.view.View; |
| import android.view.accessibility.AccessibilityManager; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| import android.widget.TextView; |
| |
| import com.android.managedprovisioning.R; |
| |
| /** |
| * Creates a new {@link ContextMenu}, and populates it with a list of links contained in a target |
| * {@link TextView}. |
| * <p> |
| * Known issue: does not listen to TalkBack on / off events. |
| */ |
| public class AccessibilityContextMenuMaker { |
| private final Activity mActivity; |
| |
| /** |
| * @param activity the target {@link TextView} belongs to |
| */ |
| public AccessibilityContextMenuMaker(Activity activity) { |
| mActivity = activity; |
| } |
| |
| /** |
| * If {@link ClickableSpan} links present, registers a context menu with the {@link Activity}. |
| * If no links present, unregisters, which is useful in case of recyclable views. |
| * |
| * @param textView target TextView potentially containing links. |
| */ |
| public void registerWithActivity(TextView textView) { |
| if (getSpans(getText(textView)).length == 0) { |
| mActivity.unregisterForContextMenu(textView); |
| textView.setAccessibilityDelegate(null); |
| textView.setClickable(false); |
| textView.setLongClickable(false); |
| return; |
| } |
| |
| mActivity.registerForContextMenu(textView); |
| textView.setOnClickListener(View::showContextMenu); |
| textView.setLongClickable(false); |
| textView.setAccessibilityDelegate( |
| new View.AccessibilityDelegate() { |
| @Override |
| public void onInitializeAccessibilityNodeInfo(View host, |
| AccessibilityNodeInfo info) { |
| super.onInitializeAccessibilityNodeInfo(host, info); |
| info.addAction( |
| new AccessibilityNodeInfo.AccessibilityAction(ACTION_CLICK.getId(), |
| textView.getContext().getString( |
| R.string.access_list_of_links))); |
| } |
| } |
| ); |
| } |
| |
| /** |
| * Call inside |
| * {@link Activity#onCreateContextMenu(ContextMenu, View, ContextMenu.ContextMenuInfo)} |
| */ |
| public void populateMenuContent(ContextMenu menu, TextView textView) { |
| if (!isScreenReaderEnabled()) { |
| return; |
| } |
| |
| Spanned spanned = getText(textView); |
| ClickableSpan[] spans = getSpans(spanned); |
| |
| if (spanned == null || spans.length == 0) { |
| return; |
| } |
| |
| for (ClickableSpan span : spans) { |
| int s = spanned.getSpanStart(span); |
| int t = spanned.getSpanEnd(span); |
| menu.add(spanned.subSequence(s, t)).setOnMenuItemClickListener(menuItem -> { |
| span.onClick(textView); |
| return false; |
| }); |
| } |
| menu.add(R.string.close_list).setOnMenuItemClickListener(menuItem -> { |
| menu.close(); |
| return false; |
| }); |
| } |
| |
| private boolean isScreenReaderEnabled() { |
| AccessibilityManager am = mActivity.getSystemService(AccessibilityManager.class); |
| return am.isEnabled() && am.isTouchExplorationEnabled(); |
| } |
| |
| private @Nullable Spanned getText(TextView textView) { |
| CharSequence text = textView.getText(); |
| return (text instanceof Spanned) ? (Spanned) text : null; |
| } |
| |
| private @NonNull ClickableSpan[] getSpans(Spanned spanned) { |
| if (spanned == null) { |
| return new ClickableSpan[0]; |
| } |
| ClickableSpan[] spans = spanned.getSpans(0, spanned.length(), ClickableSpan.class); |
| return spans.length == 0 ? new ClickableSpan[0] : spans; |
| } |
| } |