Details
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Type:
Bug
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Status: Resolved
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Priority:
P3
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Resolution: Fixed
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Affects Version/s: 8u31, 9
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Fix Version/s: 9
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Component/s: client-libs
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Labels:
-
Subcomponent:
-
Resolved In Build:b116
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OS:windows
Backports
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-8153255 | 8u102 | Dmitry Markov | P3 | Resolved | Fixed | b02 |
| JDK-8153358 | 7u111 | Dmitry Markov | P3 | Resolved | Fixed | b02 |
| JDK-8156376 | 8u111 | Dmitry Markov | P3 | Resolved | Fixed | b01 |
| JDK-8162213 | emb-8u111 | Dmitry Markov | P3 | Resolved | Fixed | b01 |
Description
On Windows some characters (in particular, left and right double quotation marks) have width differing from other characters' widths, when Monospaced logical font is used.
Activity
Problem description:
On Windows some characters (in particular, left and right double quotation marks) have width differing from other characters' widths, when Monospaced logical font is used.
The default monospaced font for windows platform is Courier New. It contains the desired characters, (i.e. '\u201c' and '\u201d'). However the characters are in 'exclusion ranges' for this font due to settings in windows.fontconfig.properties. So when we try to obtain glyphs for these characters and calculate their bounds, we fallback to another font (Lucida) and use its glyphs. That's why the width is different.
Fix:
Remove the following set of characters u2018 - u201F from the exclusion range.
On Windows some characters (in particular, left and right double quotation marks) have width differing from other characters' widths, when Monospaced logical font is used.
The default monospaced font for windows platform is Courier New. It contains the desired characters, (i.e. '\u201c' and '\u201d'). However the characters are in 'exclusion ranges' for this font due to settings in windows.fontconfig.properties. So when we try to obtain glyphs for these characters and calculate their bounds, we fallback to another font (Lucida) and use its glyphs. That's why the width is different.
Fix:
Remove the following set of characters u2018 - u201F from the exclusion range.
URL: http://hg.openjdk.java.net/jdk9/client/jdk/rev/0643c56e3c86
User: dmarkov
Date: 2016-04-01 08:27:32 +0000
User: dmarkov
Date: 2016-04-01 08:27:32 +0000
URL: http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/0643c56e3c86
User: lana
Date: 2016-04-27 18:46:47 +0000
User: lana
Date: 2016-04-27 18:46:47 +0000
import java.awt.*;
import java.awt.font.FontRenderContext;
public class MonospacedTest {
public static void main(String[] args) {
Font font = new Font(Font.MONOSPACED, Font.PLAIN, 12);
System.out.println("'a' width: " + getCharWidth(font, 'a'));
System.out.println("'\u201c' width: " + getCharWidth(font, '\u201c'));
}
private static double getCharWidth(Font font, char c) {
return font.getStringBounds(new char[]{c}, 0, 1, new
FontRenderContext(null, false, false)).getWidth();
}
}
On Windows result is:
'a' width: 7.0
'¿' width: 5.0
Expected result is the same width for both characters.
Please note: the problem is not reproducible on Linux and MacOSX.