| /* |
| * Copyright (C) 2013 DroidDriver committers |
| * |
| * 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.google.android.droiddriver.validators; |
| |
| import android.text.TextUtils; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| |
| import com.google.android.droiddriver.UiElement; |
| import com.google.android.droiddriver.actions.Action; |
| import com.google.android.droiddriver.uiautomation.UiAutomationElement; |
| |
| /** |
| * Fall-back Validator for accessibility. |
| */ |
| public class DefaultAccessibilityValidator implements Validator { |
| @Override |
| public boolean isApplicable(UiElement element, Action action) { |
| return true; |
| } |
| |
| @Override |
| public String validate(UiElement element, Action action) { |
| return isSpeakingNode(element) ? null : "TalkBack cannot speak about it"; |
| } |
| |
| // Logic from TalkBack |
| private static boolean isAccessibilityFocusable(UiElement element) { |
| if (isActionableForAccessibility(element)) { |
| return true; |
| } |
| |
| if (isTopLevelScrollItem(element) && (isSpeakingNode(element))) { |
| return true; |
| } |
| return false; |
| } |
| |
| private static boolean isTopLevelScrollItem(UiElement element) { |
| UiElement parent = element.getParent(); |
| return parent != null && parent.isScrollable(); |
| } |
| |
| private static boolean isActionableForAccessibility(UiElement element) { |
| if (element.isFocusable() || element.isClickable() || element.isLongClickable()) { |
| return true; |
| } |
| |
| if (element instanceof UiAutomationElement) { |
| AccessibilityNodeInfo node = ((UiAutomationElement) element).getRawElement(); |
| return (node.getActions() & AccessibilityNodeInfo.ACTION_FOCUS) == AccessibilityNodeInfo.ACTION_FOCUS; |
| } |
| return false; |
| } |
| |
| private static boolean isSpeakingNode(UiElement element) { |
| return hasContentDescriptionOrText(element) || element.isCheckable() |
| || hasNonActionableSpeakingChildren(element); |
| } |
| |
| private static boolean hasNonActionableSpeakingChildren(UiElement element) { |
| // Recursively check visible and non-focusable descendant nodes. |
| for (UiElement child : element.getChildren(UiElement.VISIBLE)) { |
| if (!isAccessibilityFocusable(child) && isSpeakingNode(child)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private static boolean hasContentDescriptionOrText(UiElement element) { |
| return !TextUtils.isEmpty(element.getContentDescription()) |
| || !TextUtils.isEmpty(element.getText()); |
| } |
| } |