| /* |
| * 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.scroll; |
| |
| import android.util.Log; |
| |
| import java.util.List; |
| |
| import io.appium.droiddriver.DroidDriver; |
| import io.appium.droiddriver.UiElement; |
| import io.appium.droiddriver.exceptions.ElementNotFoundException; |
| import io.appium.droiddriver.finders.By; |
| import io.appium.droiddriver.finders.Finder; |
| import io.appium.droiddriver.finders.Predicate; |
| import io.appium.droiddriver.finders.Predicates; |
| import io.appium.droiddriver.scroll.Direction.DirectionConverter; |
| import io.appium.droiddriver.scroll.Direction.LogicalDirection; |
| import io.appium.droiddriver.scroll.Direction.PhysicalDirection; |
| import io.appium.droiddriver.util.Logs; |
| |
| /** |
| * A {@link ScrollStepStrategy} that determines whether scrolling is possible |
| * based on a sentinel. |
| */ |
| public abstract class SentinelStrategy implements ScrollStepStrategy { |
| /** |
| * A {@link Finder} for sentinel. Note that unlike {@link Finder}, invisible |
| * UiElements are not skipped by default. |
| */ |
| public static abstract class Getter implements Finder { |
| protected final Predicate<? super UiElement> predicate; |
| |
| protected Getter() { |
| // Include invisible children by default. |
| this(null); |
| } |
| |
| protected Getter(Predicate<? super UiElement> predicate) { |
| this.predicate = predicate; |
| } |
| |
| /** |
| * Gets the sentinel, which must be an immediate child of {@code container} |
| * - not a descendant. Note sentinel may not exist if {@code container} has |
| * not finished updating. |
| */ |
| @Override |
| public UiElement find(UiElement container) { |
| UiElement sentinel = getSentinel(container.getChildren(predicate)); |
| if (sentinel == null) { |
| throw new ElementNotFoundException(this); |
| } |
| Logs.log(Log.INFO, "Found sentinel: " + sentinel); |
| return sentinel; |
| } |
| |
| |
| protected abstract UiElement getSentinel(List<? extends UiElement> children); |
| |
| @Override |
| public abstract String toString(); |
| } |
| |
| /** |
| * Returns the first child as the sentinel. |
| */ |
| public static final Getter FIRST_CHILD_GETTER = new Getter() { |
| @Override |
| protected UiElement getSentinel(List<? extends UiElement> children) { |
| return children.isEmpty() ? null : children.get(0); |
| } |
| |
| @Override |
| public String toString() { |
| return "FIRST_CHILD"; |
| } |
| }; |
| /** |
| * Returns the last child as the sentinel. |
| */ |
| public static final Getter LAST_CHILD_GETTER = new Getter() { |
| @Override |
| protected UiElement getSentinel(List<? extends UiElement> children) { |
| return children.isEmpty() ? null : children.get(children.size() - 1); |
| } |
| |
| @Override |
| public String toString() { |
| return "LAST_CHILD"; |
| } |
| }; |
| /** |
| * Returns the second last child as the sentinel. Useful when the activity |
| * always shows the last child as an anchor (for example a footer). |
| * <p> |
| * Sometimes uiautomatorviewer may not show the anchor as the last child, due |
| * to the reordering by layout described in {@link UiElement#getChildren}. |
| * This is not a problem with UiAutomationDriver because it sees the same as |
| * uiautomatorviewer does, but could be a problem with InstrumentationDriver. |
| * </p> |
| */ |
| public static final Getter SECOND_LAST_CHILD_GETTER = new Getter() { |
| @Override |
| protected UiElement getSentinel(List<? extends UiElement> children) { |
| return children.size() < 2 ? null : children.get(children.size() - 2); |
| } |
| |
| @Override |
| public String toString() { |
| return "SECOND_LAST_CHILD"; |
| } |
| }; |
| /** |
| * Returns the second child as the sentinel. Useful when the activity shows a |
| * fixed first child. |
| */ |
| public static final Getter SECOND_CHILD_GETTER = new Getter() { |
| @Override |
| protected UiElement getSentinel(List<? extends UiElement> children) { |
| return children.size() <= 1 ? null : children.get(1); |
| } |
| |
| @Override |
| public String toString() { |
| return "SECOND_CHILD"; |
| } |
| }; |
| |
| /** |
| * Decorates a {@link Getter} by adding another {@link Predicate}. |
| */ |
| public static class MorePredicateGetter extends Getter { |
| private final Getter original; |
| |
| public MorePredicateGetter(Getter original, Predicate<? super UiElement> extraPredicate) { |
| super(Predicates.allOf(original.predicate, extraPredicate)); |
| this.original = original; |
| } |
| |
| @Override |
| protected UiElement getSentinel(List<? extends UiElement> children) { |
| return original.getSentinel(children); |
| } |
| |
| @Override |
| public String toString() { |
| return predicate.toString() + " " + original; |
| } |
| } |
| |
| private final Getter backwardGetter; |
| private final Getter forwardGetter; |
| private final DirectionConverter directionConverter; |
| |
| protected SentinelStrategy(Getter backwardGetter, Getter forwardGetter, |
| DirectionConverter directionConverter) { |
| this.backwardGetter = backwardGetter; |
| this.forwardGetter = forwardGetter; |
| this.directionConverter = directionConverter; |
| } |
| |
| protected UiElement getSentinel(DroidDriver driver, Finder containerFinder, |
| PhysicalDirection direction) { |
| Logs.call(this, "getSentinel", driver, containerFinder, direction); |
| Finder sentinelFinder; |
| LogicalDirection logicalDirection = directionConverter.toLogicalDirection(direction); |
| if (logicalDirection == LogicalDirection.BACKWARD) { |
| sentinelFinder = By.chain(containerFinder, backwardGetter); |
| } else { |
| sentinelFinder = By.chain(containerFinder, forwardGetter); |
| } |
| return driver.on(sentinelFinder); |
| } |
| |
| @Override |
| public final DirectionConverter getDirectionConverter() { |
| return directionConverter; |
| } |
| |
| @Override |
| public void beginScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder, |
| PhysicalDirection direction) {} |
| |
| @Override |
| public void endScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder, |
| PhysicalDirection direction) {} |
| |
| @Override |
| public String toString() { |
| return String.format("{backwardGetter=%s, forwardGetter=%s}", backwardGetter, forwardGetter); |
| } |
| |
| @Override |
| public void doScroll(UiElement container, PhysicalDirection direction) { |
| container.scroll(direction); |
| } |
| } |