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 package com.google.android.droiddriver.scroll; 17 18 import com.google.android.droiddriver.DroidDriver; 19 import com.google.android.droiddriver.UiElement; 20 import com.google.android.droiddriver.finders.Finder; 21 import com.google.android.droiddriver.scroll.Direction.DirectionConverter; 22 import com.google.android.droiddriver.scroll.Direction.PhysicalDirection; 23 24 /** 25 * Interface for determining whether scrolling is possible. 26 */ 27 public interface ScrollStepStrategy { 28 /** 29 * Tries to scroll {@code containerFinder} in {@code direction}. Returns 30 * whether scrolling is effective. 31 * 32 * @param driver 33 * @param containerFinder Finder for the container that can scroll, for 34 * instance a ListView 35 * @param direction 36 * @return whether scrolling is effective 37 */ 38 boolean scroll(DroidDriver driver, Finder containerFinder, PhysicalDirection direction); 39 40 /** 41 * Returns the {@link DirectionConverter}. 42 */ 43 DirectionConverter getDirectionConverter(); 44 45 /** 46 * Called only if this step is at the beginning of a series of scroll steps 47 * with regard to the given arguments. 48 * 49 * @param driver 50 * @param containerFinder Finder for the container that can scroll, for 51 * instance a ListView 52 * @param itemFinder Finder for the desired item; relative to 53 * {@code containerFinder} 54 * @param direction 55 */ 56 void beginScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder, 57 PhysicalDirection direction); 58 59 /** 60 * Called only if this step is at the end of a series of scroll steps with 61 * regard to the given arguments. 62 * 63 * @param driver 64 * @param containerFinder Finder for the container that can scroll, for 65 * instance a ListView 66 * @param itemFinder Finder for the desired item; relative to 67 * {@code containerFinder} 68 * @param direction 69 */ 70 void endScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder, 71 PhysicalDirection direction); 72 73 /** 74 * Performs the scroll action on {@code container}. Subclasses can override 75 * this to customize the scroll action, for example, to adjust the scroll 76 * margins. 77 * 78 * @param container the container that can scroll 79 * @param direction 80 */ 81 void doScroll(UiElement container, PhysicalDirection direction); 82 83 /** 84 * {@inheritDoc} 85 * 86 * <p> 87 * It is recommended that this method return a description to help debugging. 88 */ 89 @Override 90 String toString(); 91 } 92
