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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 android.text;
import static android.text.Layout.Alignment.ALIGN_NORMAL;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.FontMetricsInt;
import android.perftests.utils.BenchmarkState;
import android.perftests.utils.PerfStatusReporter;
import android.perftests.utils.StubActivity;
import android.support.test.filters.LargeTest;
import android.support.test.rule.ActivityTestRule;
import android.text.style.ReplacementSpan;
import android.util.ArraySet;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import java.util.Arrays;
import java.util.Collection;
import java.util.Random;
@LargeTest
@RunWith(Parameterized.class)
public class DynamicLayoutPerfTest {
@Parameters(name = "{0}")
public static Collection cases() {
return Arrays.asList(new Object[][] {
{ "0%", 0.0f},
{ "1%", 0.01f},
{ "5%", 0.05f},
{ "30%", 0.3f},
{ "100%", 1.0f},
});
}
private final String mMetricKey;
private final float mProbability;
public DynamicLayoutPerfTest(String metricKey, float probability) {
mMetricKey = metricKey;
mProbability = probability;
}
private static class MockReplacementSpan extends ReplacementSpan {
@Override
public int getSize(Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) {
return 10;
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top,
int y, int bottom, Paint paint) {
}
}
@Rule
public ActivityTestRule<StubActivity> mActivityRule = new ActivityTestRule(StubActivity.class);
@Rule
public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
private final static String ALPHABETS = "abcdefghijklmnopqrstuvwxyz";
private SpannableStringBuilder getText() {
final long seed = 1234567890;
final Random r = new Random(seed);
final SpannableStringBuilder builder = new SpannableStringBuilder();
final int paragraphCount = 100;
for (int i = 0; i < paragraphCount; i++) {
final int wordCount = 5 + r.nextInt(20);
final boolean containsReplacementSpan = r.nextFloat() < mProbability;
final int replacedWordIndex = containsReplacementSpan ? r.nextInt(wordCount) : -1;
for (int j = 0; j < wordCount; j++) {
final int startIndex = builder.length();
final int wordLength = 1 + r.nextInt(10);
for (int k = 0; k < wordLength; k++) {
char c = ALPHABETS.charAt(r.nextInt(ALPHABETS.length()));
builder.append(c);
}
if (replacedWordIndex == j) {
builder.setSpan(new MockReplacementSpan(), startIndex,
builder.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
builder.append(' ');
}
builder.append('\n');
}
return builder;
}
@Test
public void testGetBlocksAlwaysNeedToBeRedrawn() {
final SpannableStringBuilder text = getText();
final DynamicLayout layout = new DynamicLayout(text, new TextPaint(), 1000,
ALIGN_NORMAL, 0, 0, false);
BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
final int steps = 10;
while (state.keepRunning()) {
for (int i = 0; i < steps; i++) {
int offset = (text.length() * i) / steps;
text.insert(offset, "\n");
text.delete(offset, offset + 1);
final ArraySet<Integer> set = layout.getBlocksAlwaysNeedToBeRedrawn();
if (set != null) {
for (int j = 0; j < set.size(); j++) {
layout.getBlockIndex(set.valueAt(j));
}
}
}
}
}
}
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