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      1 /*
      2  * Copyright (C) 2013 DroidDriver committers
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.android.droiddriver.actions.accessibility;
     18 
     19 import android.view.accessibility.AccessibilityNodeInfo;
     20 
     21 import com.google.android.droiddriver.UiElement;
     22 import com.google.android.droiddriver.actions.ScrollAction;
     23 import com.google.android.droiddriver.scroll.Direction.PhysicalDirection;
     24 import com.google.android.droiddriver.util.Strings;
     25 
     26 /**
     27  * An {@link AccessibilityAction} that scrolls an UiElement.
     28  */
     29 public class AccessibilityScrollAction extends AccessibilityAction implements ScrollAction {
     30   private final PhysicalDirection direction;
     31 
     32   public AccessibilityScrollAction(PhysicalDirection direction) {
     33     this(direction, 1000L);
     34   }
     35 
     36   public AccessibilityScrollAction(PhysicalDirection direction, long timeoutMillis) {
     37     super(timeoutMillis);
     38     this.direction = direction;
     39   }
     40 
     41   @Override
     42   protected boolean perform(AccessibilityNodeInfo node, UiElement element) {
     43     if (!element.isScrollable()) {
     44       return false;
     45     }
     46 
     47     switch (direction) {
     48       case UP:
     49       case LEFT:
     50         return node.performAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
     51       case DOWN:
     52       case RIGHT:
     53         return node.performAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
     54     }
     55     return false;
     56   }
     57 
     58   @Override
     59   public String toString() {
     60     return Strings.toStringHelper(this).addValue(direction).toString();
     61   }
     62 }
     63