1/*
2 * Copyright (C) 2017 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 androidx.transition;
18
19import static org.junit.Assert.assertEquals;
20import static org.junit.Assert.assertNotNull;
21import static org.junit.Assert.assertNull;
22import static org.mockito.Matchers.any;
23import static org.mockito.Mockito.never;
24import static org.mockito.Mockito.times;
25import static org.mockito.Mockito.verify;
26
27import android.animation.Animator;
28import android.animation.AnimatorListenerAdapter;
29import android.graphics.Matrix;
30import android.graphics.drawable.Drawable;
31import android.support.test.InstrumentationRegistry;
32import android.support.test.filters.MediumTest;
33import android.util.DisplayMetrics;
34import android.util.TypedValue;
35import android.view.ViewGroup;
36import android.widget.ImageView;
37
38import androidx.annotation.NonNull;
39import androidx.core.app.ActivityCompat;
40import androidx.transition.test.R;
41
42import org.junit.Test;
43
44@MediumTest
45public class ChangeImageTransformTest extends BaseTransitionTest {
46
47    private ChangeImageTransform mChangeImageTransform;
48    private Matrix mStartMatrix;
49    private Matrix mEndMatrix;
50    private Drawable mImage;
51    private ImageView mImageView;
52
53    @Override
54    Transition createTransition() {
55        mChangeImageTransform = new CaptureMatrix();
56        mChangeImageTransform.setDuration(100);
57        mTransition = mChangeImageTransform;
58        resetListener();
59        return mChangeImageTransform;
60    }
61
62    @Test
63    public void testCenterToFitXY() throws Throwable {
64        transformImage(ImageView.ScaleType.CENTER, ImageView.ScaleType.FIT_XY);
65        verifyMatrixMatches(centerMatrix(), mStartMatrix);
66        verifyMatrixMatches(fitXYMatrix(), mEndMatrix);
67    }
68
69    @Test
70    public void testCenterCropToFitCenter() throws Throwable {
71        transformImage(ImageView.ScaleType.CENTER_CROP, ImageView.ScaleType.FIT_CENTER);
72        verifyMatrixMatches(centerCropMatrix(), mStartMatrix);
73        verifyMatrixMatches(fitCenterMatrix(), mEndMatrix);
74    }
75
76    @Test
77    public void testCenterInsideToFitEnd() throws Throwable {
78        transformImage(ImageView.ScaleType.CENTER_INSIDE, ImageView.ScaleType.FIT_END);
79        // CENTER_INSIDE and CENTER are the same when the image is smaller than the View
80        verifyMatrixMatches(centerMatrix(), mStartMatrix);
81        verifyMatrixMatches(fitEndMatrix(), mEndMatrix);
82    }
83
84    @Test
85    public void testFitStartToCenter() throws Throwable {
86        transformImage(ImageView.ScaleType.FIT_START, ImageView.ScaleType.CENTER);
87        verifyMatrixMatches(fitStartMatrix(), mStartMatrix);
88        verifyMatrixMatches(centerMatrix(), mEndMatrix);
89    }
90
91    private Matrix centerMatrix() {
92        int imageWidth = mImage.getIntrinsicWidth();
93        int imageViewWidth = mImageView.getWidth();
94        float tx = Math.round((imageViewWidth - imageWidth) / 2f);
95
96        int imageHeight = mImage.getIntrinsicHeight();
97        int imageViewHeight = mImageView.getHeight();
98        float ty = Math.round((imageViewHeight - imageHeight) / 2f);
99
100        Matrix matrix = new Matrix();
101        matrix.postTranslate(tx, ty);
102        return matrix;
103    }
104
105    private Matrix fitXYMatrix() {
106        int imageWidth = mImage.getIntrinsicWidth();
107        int imageViewWidth = mImageView.getWidth();
108        float scaleX = ((float) imageViewWidth) / imageWidth;
109
110        int imageHeight = mImage.getIntrinsicHeight();
111        int imageViewHeight = mImageView.getHeight();
112        float scaleY = ((float) imageViewHeight) / imageHeight;
113
114        Matrix matrix = new Matrix();
115        matrix.postScale(scaleX, scaleY);
116        return matrix;
117    }
118
119    private Matrix centerCropMatrix() {
120        int imageWidth = mImage.getIntrinsicWidth();
121        int imageViewWidth = mImageView.getWidth();
122        float scaleX = ((float) imageViewWidth) / imageWidth;
123
124        int imageHeight = mImage.getIntrinsicHeight();
125        int imageViewHeight = mImageView.getHeight();
126        float scaleY = ((float) imageViewHeight) / imageHeight;
127
128        float maxScale = Math.max(scaleX, scaleY);
129
130        float width = imageWidth * maxScale;
131        float height = imageHeight * maxScale;
132        int tx = Math.round((imageViewWidth - width) / 2f);
133        int ty = Math.round((imageViewHeight - height) / 2f);
134
135        Matrix matrix = new Matrix();
136        matrix.postScale(maxScale, maxScale);
137        matrix.postTranslate(tx, ty);
138        return matrix;
139    }
140
141    private Matrix fitCenterMatrix() {
142        int imageWidth = mImage.getIntrinsicWidth();
143        int imageViewWidth = mImageView.getWidth();
144        float scaleX = ((float) imageViewWidth) / imageWidth;
145
146        int imageHeight = mImage.getIntrinsicHeight();
147        int imageViewHeight = mImageView.getHeight();
148        float scaleY = ((float) imageViewHeight) / imageHeight;
149
150        float minScale = Math.min(scaleX, scaleY);
151
152        float width = imageWidth * minScale;
153        float height = imageHeight * minScale;
154        float tx = (imageViewWidth - width) / 2f;
155        float ty = (imageViewHeight - height) / 2f;
156
157        Matrix matrix = new Matrix();
158        matrix.postScale(minScale, minScale);
159        matrix.postTranslate(tx, ty);
160        return matrix;
161    }
162
163    private Matrix fitStartMatrix() {
164        int imageWidth = mImage.getIntrinsicWidth();
165        int imageViewWidth = mImageView.getWidth();
166        float scaleX = ((float) imageViewWidth) / imageWidth;
167
168        int imageHeight = mImage.getIntrinsicHeight();
169        int imageViewHeight = mImageView.getHeight();
170        float scaleY = ((float) imageViewHeight) / imageHeight;
171
172        float minScale = Math.min(scaleX, scaleY);
173
174        Matrix matrix = new Matrix();
175        matrix.postScale(minScale, minScale);
176        return matrix;
177    }
178
179    private Matrix fitEndMatrix() {
180        int imageWidth = mImage.getIntrinsicWidth();
181        int imageViewWidth = mImageView.getWidth();
182        float scaleX = ((float) imageViewWidth) / imageWidth;
183
184        int imageHeight = mImage.getIntrinsicHeight();
185        int imageViewHeight = mImageView.getHeight();
186        float scaleY = ((float) imageViewHeight) / imageHeight;
187
188        float minScale = Math.min(scaleX, scaleY);
189
190        float width = imageWidth * minScale;
191        float height = imageHeight * minScale;
192        float tx = imageViewWidth - width;
193        float ty = imageViewHeight - height;
194
195        Matrix matrix = new Matrix();
196        matrix.postScale(minScale, minScale);
197        matrix.postTranslate(tx, ty);
198        return matrix;
199    }
200
201    private void verifyMatrixMatches(Matrix expected, Matrix matrix) {
202        if (expected == null) {
203            assertNull(matrix);
204            return;
205        }
206        assertNotNull(matrix);
207        float[] expectedValues = new float[9];
208        expected.getValues(expectedValues);
209
210        float[] values = new float[9];
211        matrix.getValues(values);
212
213        for (int i = 0; i < values.length; i++) {
214            final float expectedValue = expectedValues[i];
215            final float value = values[i];
216            assertEquals("Value [" + i + "]", expectedValue, value, 0.01f);
217        }
218    }
219
220    private void transformImage(ImageView.ScaleType startScale, final ImageView.ScaleType endScale)
221            throws Throwable {
222        final ImageView imageView = enterImageViewScene(startScale);
223        rule.runOnUiThread(new Runnable() {
224            @Override
225            public void run() {
226                TransitionManager.beginDelayedTransition(mRoot, mChangeImageTransform);
227                imageView.setScaleType(endScale);
228            }
229        });
230        waitForStart();
231        verify(mListener, (startScale == endScale) ? times(1) : never())
232                .onTransitionEnd(any(Transition.class));
233        waitForEnd();
234    }
235
236    private ImageView enterImageViewScene(final ImageView.ScaleType scaleType) throws Throwable {
237        enterScene(R.layout.scene4);
238        final ViewGroup container = (ViewGroup) rule.getActivity().findViewById(R.id.holder);
239        final ImageView[] imageViews = new ImageView[1];
240        rule.runOnUiThread(new Runnable() {
241            @Override
242            public void run() {
243                mImageView = new ImageView(rule.getActivity());
244                mImage = ActivityCompat.getDrawable(rule.getActivity(),
245                        android.R.drawable.ic_media_play);
246                mImageView.setImageDrawable(mImage);
247                mImageView.setScaleType(scaleType);
248                imageViews[0] = mImageView;
249                container.addView(mImageView);
250                ViewGroup.LayoutParams layoutParams = mImageView.getLayoutParams();
251                DisplayMetrics metrics = rule.getActivity().getResources().getDisplayMetrics();
252                float size = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, metrics);
253                layoutParams.width = Math.round(size);
254                layoutParams.height = Math.round(size * 2);
255                mImageView.setLayoutParams(layoutParams);
256            }
257        });
258        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
259        return imageViews[0];
260    }
261
262    private class CaptureMatrix extends ChangeImageTransform {
263
264        @Override
265        public Animator createAnimator(@NonNull ViewGroup sceneRoot, TransitionValues startValues,
266                TransitionValues endValues) {
267            Animator animator = super.createAnimator(sceneRoot, startValues, endValues);
268            assertNotNull(animator);
269            animator.addListener(new CaptureMatrixListener((ImageView) endValues.view));
270            return animator;
271        }
272
273    }
274
275    private class CaptureMatrixListener extends AnimatorListenerAdapter {
276
277        private final ImageView mImageView;
278
279        CaptureMatrixListener(ImageView view) {
280            mImageView = view;
281        }
282
283        @Override
284        public void onAnimationStart(Animator animation) {
285            mStartMatrix = copyMatrix();
286        }
287
288        @Override
289        public void onAnimationEnd(Animator animation) {
290            mEndMatrix = copyMatrix();
291        }
292
293        private Matrix copyMatrix() {
294            Matrix matrix = mImageView.getImageMatrix();
295            if (matrix != null) {
296                matrix = new Matrix(matrix);
297            }
298            return matrix;
299        }
300
301    }
302
303}
304