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.actions.ScrollDirection; 19 import com.google.android.droiddriver.exceptions.ActionException; 20 21 /** 22 * Interfaces and constants for scroll directions. 23 */ 24 public interface Direction { 25 /** Logical directions */ 26 public enum LogicalDirection { 27 FORWARD, BACKWARD; 28 } 29 30 public enum Axis { 31 HORIZONTAL { 32 private final ScrollDirection[] directions = {ScrollDirection.LEFT, ScrollDirection.RIGHT}; 33 34 @Override 35 public ScrollDirection[] getDirections() { 36 return directions; 37 } 38 }, 39 VERTICAL { 40 private final ScrollDirection[] directions = {ScrollDirection.UP, ScrollDirection.DOWN}; 41 42 @Override 43 public ScrollDirection[] getDirections() { 44 return directions; 45 } 46 }; 47 public abstract ScrollDirection[] getDirections(); 48 } 49 50 /** 51 * Converts ScrollDirection to LogicalDirection. 52 */ 53 public interface PhysicalToLogicalConverter { 54 /** 55 * Converts ScrollDirection to LogicalDirection. It's possible to override 56 * this for RTL (right-to-left) views, for example. 57 */ 58 LogicalDirection toLogicalDirection(ScrollDirection direction); 59 60 /** Follows standard directions: up-to-down, left-to-right */ 61 PhysicalToLogicalConverter STANDARD_CONVERTER = new PhysicalToLogicalConverter() { 62 @Override 63 public LogicalDirection toLogicalDirection(ScrollDirection direction) { 64 switch (direction) { 65 case UP: 66 return LogicalDirection.BACKWARD; 67 case DOWN: 68 return LogicalDirection.FORWARD; 69 case LEFT: 70 return LogicalDirection.BACKWARD; 71 case RIGHT: 72 return LogicalDirection.FORWARD; 73 } 74 throw new ActionException("Unknown scroll direction: " + direction); 75 } 76 }; 77 } 78 } 79
