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+/*
+ * 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 io.appium.droiddriver.uiautomation;
+
+import android.annotation.TargetApi;
+import android.app.UiAutomation;
+import android.app.UiAutomation.AccessibilityEventFilter;
+import android.graphics.Rect;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityNodeInfo;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.FutureTask;
+import java.util.concurrent.TimeoutException;
+
+import io.appium.droiddriver.actions.InputInjector;
+import io.appium.droiddriver.base.BaseUiElement;
+import io.appium.droiddriver.finders.Attribute;
+import io.appium.droiddriver.uiautomation.UiAutomationContext.UiAutomationCallable;
+import io.appium.droiddriver.util.Preconditions;
+
+import static io.appium.droiddriver.util.Strings.charSequenceToString;
+
+/**
+ * A UiElement that gets attributes via the Accessibility API.
+ */
+@TargetApi(18)
+public class UiAutomationElement extends BaseUiElement<AccessibilityNodeInfo, UiAutomationElement> {
+ private static final AccessibilityEventFilter ANY_EVENT_FILTER = new AccessibilityEventFilter() {
+ @Override
+ public boolean accept(AccessibilityEvent arg0) {
+ return true;
+ }
+ };
+
+ private final AccessibilityNodeInfo node;
+ private final UiAutomationContext context;
+ private final Map<Attribute, Object> attributes;
+ private final boolean visible;
+ private final Rect visibleBounds;
+ private final UiAutomationElement parent;
+ private final List<UiAutomationElement> children;
+
+ /**
+ * A snapshot of all attributes is taken at construction. The attributes of a
+ * {@code UiAutomationElement} instance are immutable. If the underlying
+ * {@link AccessibilityNodeInfo} is updated, a new {@code UiAutomationElement}
+ * instance will be created in
+ * {@link io.appium.droiddriver.DroidDriver#refreshUiElementTree}.
+ */
+ protected UiAutomationElement(UiAutomationContext context, AccessibilityNodeInfo node,
+ UiAutomationElement parent) {
+ this.node = Preconditions.checkNotNull(node);
+ this.context = Preconditions.checkNotNull(context);
+ this.parent = parent;
+
+ Map<Attribute, Object> attribs = new EnumMap<Attribute, Object>(Attribute.class);
+ put(attribs, Attribute.PACKAGE, charSequenceToString(node.getPackageName()));
+ put(attribs, Attribute.CLASS, charSequenceToString(node.getClassName()));
+ put(attribs, Attribute.TEXT, charSequenceToString(node.getText()));
+ put(attribs, Attribute.CONTENT_DESC, charSequenceToString(node.getContentDescription()));
+ put(attribs, Attribute.RESOURCE_ID, charSequenceToString(node.getViewIdResourceName()));
+ put(attribs, Attribute.CHECKABLE, node.isCheckable());
+ put(attribs, Attribute.CHECKED, node.isChecked());
+ put(attribs, Attribute.CLICKABLE, node.isClickable());
+ put(attribs, Attribute.ENABLED, node.isEnabled());
+ put(attribs, Attribute.FOCUSABLE, node.isFocusable());
+ put(attribs, Attribute.FOCUSED, node.isFocused());
+ put(attribs, Attribute.LONG_CLICKABLE, node.isLongClickable());
+ put(attribs, Attribute.PASSWORD, node.isPassword());
+ put(attribs, Attribute.SCROLLABLE, node.isScrollable());
+ if (node.getTextSelectionStart() >= 0
+ && node.getTextSelectionStart() != node.getTextSelectionEnd()) {
+ attribs.put(Attribute.SELECTION_START, node.getTextSelectionStart());
+ attribs.put(Attribute.SELECTION_END, node.getTextSelectionEnd());
+ }
+ put(attribs, Attribute.SELECTED, node.isSelected());
+ put(attribs, Attribute.BOUNDS, getBounds(node));
+ attributes = Collections.unmodifiableMap(attribs);
+
+ // Order matters as getVisibleBounds depends on visible
+ visible = node.isVisibleToUser();
+ visibleBounds = getVisibleBounds(node);
+ List<UiAutomationElement> mutableChildren = buildChildren(node);
+ this.children = mutableChildren == null ? null : Collections.unmodifiableList(mutableChildren);
+ }
+
+ private void put(Map<Attribute, Object> attribs, Attribute key, Object value) {
+ if (value != null) {
+ attribs.put(key, value);
+ }
+ }
+
+ private List<UiAutomationElement> buildChildren(AccessibilityNodeInfo node) {
+ List<UiAutomationElement> children;
+ int childCount = node.getChildCount();
+ if (childCount == 0) {
+ children = null;
+ } else {
+ children = new ArrayList<UiAutomationElement>(childCount);
+ for (int i = 0; i < childCount; i++) {
+ AccessibilityNodeInfo child = node.getChild(i);
+ if (child != null) {
+ children.add(context.getElement(child, this));
+ }
+ }
+ }
+ return children;
+ }
+
+ private Rect getBounds(AccessibilityNodeInfo node) {
+ Rect rect = new Rect();
+ node.getBoundsInScreen(rect);
+ return rect;
+ }
+
+ private Rect getVisibleBounds(AccessibilityNodeInfo node) {
+ if (!visible) {
+ return new Rect();
+ }
+ Rect visibleBounds = getBounds();
+ UiAutomationElement parent = getParent();
+ Rect parentBounds;
+ while (parent != null) {
+ parentBounds = parent.getBounds();
+ visibleBounds.intersect(parentBounds);
+ parent = parent.getParent();
+ }
+ return visibleBounds;
+ }
+
+ @Override
+ public Rect getVisibleBounds() {
+ return visibleBounds;
+ }
+
+ @Override
+ public boolean isVisible() {
+ return visible;
+ }
+
+ @Override
+ public UiAutomationElement getParent() {
+ return parent;
+ }
+
+ @Override
+ protected List<UiAutomationElement> getChildren() {
+ return children;
+ }
+
+ @Override
+ protected Map<Attribute, Object> getAttributes() {
+ return attributes;
+ }
+
+ @Override
+ public InputInjector getInjector() {
+ return context.getDriver().getInjector();
+ }
+
+ /**
+ * Note: This implementation of {@code doPerformAndWait} clears the
+ * {@code AccessibilityEvent} queue.
+ */
+ @Override
+ protected void doPerformAndWait(final FutureTask<Boolean> futureTask, final long timeoutMillis) {
+ context.callUiAutomation(new UiAutomationCallable<Void>() {
+
+ @Override
+ public Void call(UiAutomation uiAutomation) {
+ try {
+ uiAutomation.executeAndWaitForEvent(futureTask, ANY_EVENT_FILTER, timeoutMillis);
+ } catch (TimeoutException e) {
+ // This is for sync'ing with Accessibility API on best-effort because
+ // it is not reliable.
+ // Exception is ignored here. Tests will fail anyways if this is
+ // critical.
+ // Actions should usually trigger some AccessibilityEvent's, but some
+ // widgets fail to do so, resulting in stale AccessibilityNodeInfo's.
+ // As a work-around, force to clear the AccessibilityNodeInfoCache.
+ // A legitimate case of no AccessibilityEvent is when scrolling has
+ // reached the end, but we cannot tell whether it's legitimate or the
+ // widget has bugs, so clearAccessibilityNodeInfoCache anyways.
+ context.getDriver().clearAccessibilityNodeInfoCache();
+ }
+ return null;
+ }
+
+ });
+ }
+
+ @Override
+ public AccessibilityNodeInfo getRawElement() {
+ return node;
+ }
+}