[go: nahoru, domu]
1/*
2 * Copyright (C) 2016 The Android Open Source Project
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
17package android.support.v4.widget;
18
19import org.junit.Before;
20import org.junit.Test;
21
22import android.graphics.Rect;
23import android.os.Build;
24import android.os.Bundle;
25import android.support.test.annotation.UiThreadTest;
26import android.support.v4.BaseInstrumentationTestCase;
27import android.support.v4.test.R;
28import android.support.v4.view.ViewCompat;
29import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
30import android.test.suitebuilder.annotation.SmallTest;
31import android.view.View;
32
33import java.util.List;
34
35import static junit.framework.Assert.assertFalse;
36import static org.junit.Assert.assertEquals;
37import static org.junit.Assert.assertNotNull;
38import static org.junit.Assume.assumeTrue;
39
40@SmallTest
41public class ExploreByTouchHelperTest extends BaseInstrumentationTestCase<ExploreByTouchHelperTestActivity> {
42    private View mHost;
43
44    public ExploreByTouchHelperTest() {
45        super(ExploreByTouchHelperTestActivity.class);
46    }
47
48    @Before
49    public void setUp() {
50        // Accessibility delegates are only supported on API 14+.
51        assumeTrue(Build.VERSION.SDK_INT >= 14);
52        mHost = mActivityTestRule.getActivity().findViewById(R.id.host_view);
53    }
54
55    @Test
56    @UiThreadTest
57    public void testBoundsInScreen() {
58        final ExploreByTouchHelper helper = new ParentBoundsHelper(mHost);
59        ViewCompat.setAccessibilityDelegate(mHost, helper);
60
61        final AccessibilityNodeInfoCompat node =
62                helper.getAccessibilityNodeProvider(mHost).createAccessibilityNodeInfo(1);
63        assertNotNull(node);
64
65        final Rect hostBounds = new Rect();
66        mHost.getLocalVisibleRect(hostBounds);
67        assertFalse("Host has not been laid out", hostBounds.isEmpty());
68
69        final Rect nodeBoundsInParent = new Rect();
70        node.getBoundsInParent(nodeBoundsInParent);
71        assertEquals("Wrong bounds in parent", hostBounds, nodeBoundsInParent);
72
73        final Rect hostBoundsOnScreen = getBoundsOnScreen(mHost);
74        final Rect nodeBoundsInScreen = new Rect();
75        node.getBoundsInScreen(nodeBoundsInScreen);
76        assertEquals("Wrong bounds in screen", hostBoundsOnScreen, nodeBoundsInScreen);
77
78        final int scrollX = 100;
79        final int scrollY = 50;
80        mHost.scrollTo(scrollX, scrollY);
81
82        // Generate a node for the new position.
83        final AccessibilityNodeInfoCompat scrolledNode =
84                helper.getAccessibilityNodeProvider(mHost).createAccessibilityNodeInfo(1);
85        assertNotNull(scrolledNode);
86
87        mHost.getLocalVisibleRect(hostBounds);
88        hostBounds.intersect(nodeBoundsInParent);
89        final Rect scrolledNodeBoundsInParent = new Rect();
90        scrolledNode.getBoundsInParent(scrolledNodeBoundsInParent);
91        assertEquals("Wrong bounds in parent after scrolling",
92                hostBounds, scrolledNodeBoundsInParent);
93
94        final Rect expectedBoundsInScreen = new Rect(hostBoundsOnScreen);
95        expectedBoundsInScreen.offset(-scrollX, -scrollY);
96        expectedBoundsInScreen.intersect(hostBoundsOnScreen);
97        scrolledNode.getBoundsInScreen(nodeBoundsInScreen);
98        assertEquals("Wrong bounds in screen after scrolling",
99                expectedBoundsInScreen, nodeBoundsInScreen);
100
101        ViewCompat.setAccessibilityDelegate(mHost, null);
102    }
103
104    private static Rect getBoundsOnScreen(View v) {
105        final int[] tempLocation = new int[2];
106        final Rect hostBoundsOnScreen = new Rect(0, 0, v.getWidth(), v.getHeight());
107        v.getLocationOnScreen(tempLocation);
108        hostBoundsOnScreen.offset(tempLocation[0], tempLocation[1]);
109        return hostBoundsOnScreen;
110    }
111
112    /**
113     * An extension of ExploreByTouchHelper that contains a single virtual view
114     * whose bounds match the host view.
115     */
116    private static class ParentBoundsHelper extends ExploreByTouchHelper {
117        private final View mHost;
118
119        public ParentBoundsHelper(View host) {
120            super(host);
121
122            mHost = host;
123        }
124
125        @Override
126        protected int getVirtualViewAt(float x, float y) {
127            return 1;
128        }
129
130        @Override
131        protected void getVisibleVirtualViews(List<Integer> virtualViewIds) {
132            virtualViewIds.add(1);
133        }
134
135        @Override
136        protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfoCompat node) {
137            if (virtualViewId == 1) {
138                node.setContentDescription("test");
139
140                final Rect hostBounds = new Rect(0, 0, mHost.getWidth(), mHost.getHeight());
141                node.setBoundsInParent(hostBounds);
142            }
143        }
144
145        @Override
146        protected boolean onPerformActionForVirtualView(int virtualViewId, int action, Bundle arguments) {
147            return false;
148        }
149    }
150}
151