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/**
* Copyright (c) 2018 Angelo ZERR.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - StyledText.setStyleRange resets less cache - Bug 530019
*/
package org.eclipse.swt.tests.junit;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.TextLayout;
import org.eclipse.swt.widgets.Shell;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
/**
* Automated Test Suite for class org.eclipse.swt.custom.StyledText to check there is no regression with Bug 530019
*
* @see org.eclipse.swt.custom.StyledText
*/
public class Test_org_eclipse_swt_custom_StyledText_VariableLineHeight {
Shell shell;
StyledText styledText;
@Before
public void setUp() {
shell = new Shell();
styledText = new StyledText(shell, SWT.NULL);
styledText.setLineSpacingProvider(l -> 0);
}
@After
public void tearDown() {
shell.dispose();
}
@Test
public void testRise() {
styledText.setText("a\nb\nc\nd");
int length = styledText.getCharCount();
// No style
assertVariableLineHeightEquals(0, 0);
// style with rise=1
StyleRange style = new StyleRange();
style.start = 0;
style.length = length;
style.rise = 1;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(1, 0);
// style with rise=0
style = new StyleRange();
style.start = 0;
style.length = length;
style.rise = 0;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0);
// style with rise=2
style = new StyleRange();
style.start = 0;
style.length = length;
style.rise = 2;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(2, 0);
// style with rise=2 again
style = new StyleRange();
style.start = 0;
style.length = length;
style.rise = 2;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(2, 0);
}
@Test
public void testFont() {
styledText.setText("a\nb\nc\nd");
// Create little, big font
Font initialFont = styledText.getFont();
FontData[] fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(24);
}
Font bigFont = new Font(styledText.getDisplay(), fontData);
fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(fontData[i].getHeight() - 1);
}
Font littleFont = new Font(styledText.getDisplay(), fontData);
int length = styledText.getCharCount();
// No style
assertVariableLineHeightEquals(0, 0);
// style with big font
StyleRange style = new StyleRange();
style.start = 0;
style.length = length;
style.foreground = styledText.getDisplay().getSystemColor(SWT.COLOR_BLUE);
style.font = bigFont;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0, bigFont);
// style with no font
style = new StyleRange();
style.start = 0;
style.length = length;
style.foreground = styledText.getDisplay().getSystemColor(SWT.COLOR_BLUE);
style.font = null;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0);
// style with big font
style = new StyleRange();
style.start = 0;
style.length = length;
style.foreground = styledText.getDisplay().getSystemColor(SWT.COLOR_BLUE);
style.font = bigFont;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0, bigFont);
// style with little font
style = new StyleRange();
style.start = 0;
style.length = length;
style.foreground = styledText.getDisplay().getSystemColor(SWT.COLOR_BLUE);
style.font = littleFont;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0);
// style with no font
style = new StyleRange();
style.start = 0;
style.length = length;
style.foreground = styledText.getDisplay().getSystemColor(SWT.COLOR_BLUE);
style.font = null;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0);
// style with little font
style = new StyleRange();
style.start = 0;
style.length = length;
style.foreground = styledText.getDisplay().getSystemColor(SWT.COLOR_BLUE);
style.font = littleFont;
styledText.replaceStyleRanges(0, length, new StyleRange[] { style });
assertVariableLineHeightEquals(0, 0);
bigFont.dispose();
littleFont.dispose();
}
@Test
public void testLittleFontSeveralRanges() {
styledText.setText("abc\nd");
// Create little, big font
Font initialFont = styledText.getFont();
FontData[] fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(fontData[i].getHeight() / 2);
}
Font littleFont1 = new Font(styledText.getDisplay(), fontData);
fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(fontData[i].getHeight() / 4);
}
Font littleFont2 = new Font(styledText.getDisplay(), fontData);
StyleRange[] ranges = new StyleRange[2];
ranges[0] = new StyleRange();
ranges[0].start = 0;
ranges[0].length = 1;
ranges[0].font = littleFont1;
ranges[1] = new StyleRange();
ranges[1].start = 1;
ranges[1].length = 1;
ranges[1].font = littleFont2;
styledText.replaceStyleRanges(0, 3,ranges);
// 2 little fonts, line height is the height of the default font of StyledText
assertVariableLineHeightEquals(0, 0);
littleFont1.dispose();
littleFont2.dispose();
}
@Test
public void testBigFontSeveralRanges() {
styledText.setText("abc\nd");
// Create little, big font
Font initialFont = styledText.getFont();
FontData[] fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(fontData[i].getHeight() * 2);
}
Font bigFont = new Font(styledText.getDisplay(), fontData);
fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(fontData[i].getHeight() / 2);
}
Font littleFont = new Font(styledText.getDisplay(), fontData);
StyleRange[] ranges = new StyleRange[2];
ranges[0] = new StyleRange();
ranges[0].start = 0;
ranges[0].length = 1;
ranges[0].font = bigFont;
ranges[1] = new StyleRange();
ranges[1].start = 1;
ranges[1].length = 1;
ranges[1].font = littleFont;
styledText.replaceStyleRanges(0, 3,ranges);
// line height is the height of the big font
assertVariableLineHeightEquals(0, 0, bigFont);
bigFont.dispose();
littleFont.dispose();
}
private void assertVariableLineHeightEquals(int expected, int lineIndex) {
assertVariableLineHeightEquals(expected, lineIndex, null);
}
private void assertVariableLineHeightEquals(int expected, int lineIndex, Font font) {
int fontHeight = styledText.getLineHeight();
if (font != null) {
TextLayout layout = new TextLayout(font.getDevice());
layout.setFont(font);
layout.setText("a");
fontHeight = layout.getBounds().height;
layout.dispose();
}
int actual = styledText.getLinePixel(lineIndex + 1) - styledText.getLinePixel(lineIndex) - fontHeight;
Assert.assertEquals(expected, actual);
}
}
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