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/*
* Copyright (C) 2018 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.TextDirectionHeuristics.LTR;
import android.perftests.utils.BenchmarkState;
import android.perftests.utils.PerfStatusReporter;
import android.support.test.filters.LargeTest;
import android.support.test.runner.AndroidJUnit4;
import android.content.res.ColorStateList;
import android.graphics.Canvas;
import android.graphics.Typeface;
import android.text.Layout;
import android.text.style.TextAppearanceSpan;
import android.view.DisplayListCanvas;
import android.view.RenderNode;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.nio.CharBuffer;
import java.util.Random;
public class TextPerfUtils {
private static final int PARA_LENGTH = 500; // Number of characters in a paragraph.
private Random mRandom = new Random(0);
private static final String ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
private static final int ALPHABET_LENGTH = ALPHABET.length();
private static final ColorStateList TEXT_COLOR = ColorStateList.valueOf(0x00000000);
private static final String[] FAMILIES = { "sans-serif", "serif", "monospace" };
private static final int[] STYLES = {
Typeface.NORMAL, Typeface.BOLD, Typeface.ITALIC, Typeface.BOLD_ITALIC
};
private final char[] mBuffer = new char[PARA_LENGTH];
public void resetRandom(long seed) {
mRandom = new Random(seed);
}
public CharSequence nextRandomParagraph(int wordLen, boolean applyRandomStyle) {
for (int i = 0; i < PARA_LENGTH; i++) {
if (i % (wordLen + 1) == wordLen) {
mBuffer[i] = ' ';
} else {
mBuffer[i] = ALPHABET.charAt(mRandom.nextInt(ALPHABET_LENGTH));
}
}
CharSequence cs = CharBuffer.wrap(mBuffer);
if (!applyRandomStyle) {
return cs;
}
SpannableStringBuilder ssb = new SpannableStringBuilder(cs);
for (int i = 0; i < ssb.length(); i += wordLen + 1) {
final int spanStart = i;
final int spanEnd = (i + wordLen) > ssb.length() ? ssb.length() : i + wordLen;
final TextAppearanceSpan span = new TextAppearanceSpan(
FAMILIES[mRandom.nextInt(FAMILIES.length)],
STYLES[mRandom.nextInt(STYLES.length)],
24 + mRandom.nextInt(32), // text size. min 24 max 56
TEXT_COLOR, TEXT_COLOR);
ssb.setSpan(span, spanStart, spanEnd, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
}
return ssb;
}
}
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