/*
* Copyright (C) 2015 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.graphics;
import android.test.AndroidTestCase;
public class PaintTest extends AndroidTestCase {
public void testGetTextRunAdvances() {
{
// LTR
String text = "abcdef";
assertGetTextRunAdvances(text, 0, text.length(), 0, text.length(), false, true);
assertGetTextRunAdvances(text, 1, text.length() - 1, 0, text.length(), false, false);
}
{
// RTL
final String text =
"\u0645\u0627\u0020\u0647\u064A\u0020\u0627\u0644\u0634" +
"\u0641\u0631\u0629\u0020\u0627\u0644\u0645\u0648\u062D" +
"\u062F\u0629\u0020\u064A\u0648\u0646\u064A\u0643\u0648" +
"\u062F\u061F";
assertGetTextRunAdvances(text, 0, text.length(), 0, text.length(), true, true);
assertGetTextRunAdvances(text, 1, text.length() - 1, 0, text.length(), true, false);
}
}
private void assertGetTextRunAdvances(String str, int start, int end,
int contextStart, int contextEnd, boolean isRtl, boolean compareWithOtherMethods) {
Paint p = new Paint();
final int count = end - start;
final float[][] advanceArrays = new float[4][count];
final float advance = p.getTextRunAdvances(str, start, end, contextStart, contextEnd,
isRtl, advanceArrays[0], 0);
char chars[] = str.toCharArray();
final float advance_c = p.getTextRunAdvances(chars, start, count, contextStart,
contextEnd - contextStart, isRtl, advanceArrays[1], 0);
assertEquals(advance, advance_c, 1.0f);
for (int c = 1; c < count; ++c) {
final float firstPartAdvance = p.getTextRunAdvances(str, start, start + c,
contextStart, contextEnd, isRtl, advanceArrays[2], 0);
final float secondPartAdvance = p.getTextRunAdvances(str, start + c, end,
contextStart, contextEnd, isRtl, advanceArrays[2], c);
assertEquals(advance, firstPartAdvance + secondPartAdvance, 1.0f);
final float firstPartAdvance_c = p.getTextRunAdvances(chars, start, c,
contextStart, contextEnd - contextStart, isRtl, advanceArrays[3], 0);
final float secondPartAdvance_c = p.getTextRunAdvances(chars, start + c,
count - c, contextStart, contextEnd - contextStart, isRtl,
advanceArrays[3], c);
assertEquals(advance, firstPartAdvance_c + secondPartAdvance_c, 1.0f);
assertEquals(firstPartAdvance, firstPartAdvance_c, 1.0f);
assertEquals(secondPartAdvance, secondPartAdvance_c, 1.0f);
for (int i = 1; i < advanceArrays.length; i++) {
for (int j = 0; j < count; j++) {
assertEquals(advanceArrays[0][j], advanceArrays[i][j], 1.0f);
}
}
// Compare results with measureText, getRunAdvance, and getTextWidths.
if (compareWithOtherMethods && start == contextStart && end == contextEnd) {
assertEquals(advance, p.measureText(str, start, end), 1.0f);
assertEquals(advance, p.getRunAdvance(
str, start, end, contextStart, contextEnd, isRtl, end), 1.0f);
final float[] widths = new float[count];
p.getTextWidths(str, start, end, widths);
for (int i = 0; i < count; i++) {
assertEquals(advanceArrays[0][i], widths[i], 1.0f);
}
}
}
}
public void testGetTextRunAdvances_invalid() {
Paint p = new Paint();
String text = "test";
try {
p.getTextRunAdvances((String)null, 0, 0, 0, 0, false, null, 0);
fail("Should throw an IllegalArgumentException.");
} catch (IllegalArgumentException e) {
}
try {
p.getTextRunAdvances((CharSequence)null, 0, 0, 0, 0, false, null, 0);
fail("Should throw an IllegalArgumentException.");
} catch (IllegalArgumentException e) {
}
try {
p.getTextRunAdvances((char[])null, 0, 0, 0, 0, false, null, 0);
fail("Should throw an IllegalArgumentException.");
} catch (IllegalArgumentException e) {
}
try {
p.getTextRunAdvances(text, 0, text.length(), 0, text.length(), false,
new float[text.length() - 1], 0);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
try {
p.getTextRunAdvances(text, 0, text.length(), 0, text.length(), false,
new float[text.length()], 1);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
// 0 > contextStart
try {
p.getTextRunAdvances(text, 0, text.length(), -1, text.length(), false, null, 0);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
// contextStart > start
try {
p.getTextRunAdvances(text, 0, text.length(), 1, text.length(), false, null, 0);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
// start > end
try {
p.getTextRunAdvances(text, 1, 0, 0, text.length(), false, null, 0);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
// end > contextEnd
try {
p.getTextRunAdvances(text, 0, text.length(), 0, text.length() - 1, false, null, 0);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
// contextEnd > text.length
try {
p.getTextRunAdvances(text, 0, text.length(), 0, text.length() + 1, false, null, 0);
fail("Should throw an IndexOutOfBoundsException.");
} catch (IndexOutOfBoundsException e) {
}
}
public void testMeasureTextBidi() {
Paint p = new Paint();
{
String bidiText = "abc \u0644\u063A\u0629 def";
p.setBidiFlags(Paint.BIDI_LTR);
float width = p.measureText(bidiText, 0, 4);
p.setBidiFlags(Paint.BIDI_RTL);
width += p.measureText(bidiText, 4, 7);
p.setBidiFlags(Paint.BIDI_LTR);
width += p.measureText(bidiText, 7, bidiText.length());
assertEquals(width, p.measureText(bidiText), 1.0f);
}
{
String bidiText = "abc \u0644\u063A\u0629 def";
p.setBidiFlags(Paint.BIDI_DEFAULT_LTR);
float width = p.measureText(bidiText, 0, 4);
width += p.measureText(bidiText, 4, 7);
width += p.measureText(bidiText, 7, bidiText.length());
assertEquals(width, p.measureText(bidiText), 1.0f);
}
{
String bidiText = "abc \u0644\u063A\u0629 def";
p.setBidiFlags(Paint.BIDI_FORCE_LTR);
float width = p.measureText(bidiText, 0, 4);
width += p.measureText(bidiText, 4, 7);
width += p.measureText(bidiText, 7, bidiText.length());
assertEquals(width, p.measureText(bidiText), 1.0f);
}
{
String bidiText = "\u0644\u063A\u0629 abc \u0644\u063A\u0629";
p.setBidiFlags(Paint.BIDI_RTL);
float width = p.measureText(bidiText, 0, 4);
p.setBidiFlags(Paint.BIDI_LTR);
width += p.measureText(bidiText, 4, 7);
p.setBidiFlags(Paint.BIDI_RTL);
width += p.measureText(bidiText, 7, bidiText.length());
assertEquals(width, p.measureText(bidiText), 1.0f);
}
{
String bidiText = "\u0644\u063A\u0629 abc \u0644\u063A\u0629";
p.setBidiFlags(Paint.BIDI_DEFAULT_RTL);
float width = p.measureText(bidiText, 0, 4);
width += p.measureText(bidiText, 4, 7);
width += p.measureText(bidiText, 7, bidiText.length());
assertEquals(width, p.measureText(bidiText), 1.0f);
}
{
String bidiText = "\u0644\u063A\u0629 abc \u0644\u063A\u0629";
p.setBidiFlags(Paint.BIDI_FORCE_RTL);
float width = p.measureText(bidiText, 0, 4);
width += p.measureText(bidiText, 4, 7);
width += p.measureText(bidiText, 7, bidiText.length());
assertEquals(width, p.measureText(bidiText), 1.0f);
}
}
}