| /* |
| * 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.text.style.ReplacementSpan; |
| import junit.framework.TestCase; |
| |
| public class DynamicLayoutTest extends TestCase { |
| private static final int WIDTH = 10000; |
| |
| public void testGetBlocksAlwaysNeedToBeRedrawn_en() { |
| final SpannableStringBuilder builder = new SpannableStringBuilder(); |
| final DynamicLayout layout = new DynamicLayout(builder, new TextPaint(), WIDTH, |
| ALIGN_NORMAL, 0, 0, false); |
| |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| |
| builder.append("abcd efg\n"); |
| builder.append("hijk lmn\n"); |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| |
| builder.delete(0, builder.length()); |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| } |
| |
| |
| 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) { |
| } |
| } |
| |
| public void testGetBlocksAlwaysNeedToBeRedrawn_replacementSpan() { |
| final SpannableStringBuilder builder = new SpannableStringBuilder(); |
| final DynamicLayout layout = new DynamicLayout(builder, new TextPaint(), WIDTH, |
| ALIGN_NORMAL, 0, 0, false); |
| |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| |
| builder.append("abcd efg\n"); |
| builder.append("hijk lmn\n"); |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| |
| builder.setSpan(new MockReplacementSpan(), 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| assertNotNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().contains(0)); |
| |
| builder.setSpan(new MockReplacementSpan(), 9, 13, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().contains(0)); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().contains(1)); |
| |
| builder.delete(9, 13); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().contains(0)); |
| assertFalse(layout.getBlocksAlwaysNeedToBeRedrawn().contains(1)); |
| |
| builder.delete(0, 4); |
| assertFalse(layout.getBlocksAlwaysNeedToBeRedrawn().contains(0)); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().isEmpty()); |
| } |
| |
| public void testGetBlocksAlwaysNeedToBeRedrawn_thai() { |
| final SpannableStringBuilder builder = new SpannableStringBuilder(); |
| final DynamicLayout layout = new DynamicLayout(builder, new TextPaint(), WIDTH, |
| ALIGN_NORMAL, 0, 0, false); |
| |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| |
| builder.append("\u0E22\u0E34\u0E19\u0E14\u0E35\u0E15\u0E49\u0E2D\u0E19\u0E23\u0E31\u0E1A"); |
| builder.append("\u0E2A\u0E39\u0E48"); |
| assertNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| |
| builder.append("\u0E48\u0E48\u0E48\u0E48\u0E48"); |
| assertNotNull(layout.getBlocksAlwaysNeedToBeRedrawn()); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().contains(0)); |
| |
| builder.delete(builder.length() -5, builder.length()); |
| assertFalse(layout.getBlocksAlwaysNeedToBeRedrawn().contains(0)); |
| assertTrue(layout.getBlocksAlwaysNeedToBeRedrawn().isEmpty()); |
| } |
| } |