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improved handling rotated text in HSSFSheet.autoSizeColumn

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@592519 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yegor Kozlov 2007-11-06 18:52:14 +00:00
parent c93e470560
commit 65f468498a
1 changed files with 57 additions and 43 deletions
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56
src/java/org/apache/poi/hssf/usermodel/HSSFSheet.java
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@ -1441,17 +1441,15 @@ public class HSSFSheet
/**
* Excel measures columns in units of 1/256th of a character width
* but the docs say nothing about what particular character is used.
* '0' looks a good choice.
* '0' looks to be a good choice.
*/
char defaultChar = '0';
/**
* This is the multiple of the scale measure that is added to the height
* of rotated text.
*
* TODO: research if this constant works well with different font sizes and different dpi
* This is the multiple that the font height is scaled by when determining the
* boundary of rotated text.
*/
double rotationLeadingMultiple = 40.0;
double fontHeightMultiple = 2.0;
FontRenderContext frc = new FontRenderContext(null, true, true);
@ -1459,8 +1457,7 @@ public class HSSFSheet
HSSFFont defaultFont = wb.getFontAt((short) 0);
str = new AttributedString("" + defaultChar);
str.addAttribute(TextAttribute.FAMILY, defaultFont.getFontName());
str.addAttribute(TextAttribute.SIZE, new Float(defaultFont.getFontHeightInPoints()));
copyAttributes(defaultFont, str, 0, 1);
layout = new TextLayout(str.getIterator(), frc);
int defaultCharWidth = (int)layout.getAdvance();
@ -1477,22 +1474,22 @@ public class HSSFSheet
HSSFRichTextString rt = cell.getRichStringCellValue();
String[] lines = rt.getString().split("\\n");
for (int i = 0; i < lines.length; i++) {
str = new AttributedString(lines[i] + defaultChar);
str.addAttribute(TextAttribute.FAMILY, font.getFontName());
str.addAttribute(TextAttribute.SIZE, new Float(font.getFontHeightInPoints()));
if (font.getBoldweight() == HSSFFont.BOLDWEIGHT_BOLD) str.addAttribute(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD);
String txt = lines[i] + defaultChar;
str = new AttributedString(txt);
copyAttributes(font, str, 0, txt.length());
if (rt.numFormattingRuns() > 0) {
for (int j = 0; j < lines[i].length(); j++) {
int idx = rt.getFontAtIndex(j);
if (idx != 0) {
HSSFFont fnt = wb.getFontAt((short) idx);
str.addAttribute(TextAttribute.FAMILY, fnt.getFontName(), j, j + 1);
str.addAttribute(TextAttribute.SIZE, new Float(fnt.getFontHeightInPoints()), j, j + 1);
copyAttributes(fnt, str, j, j + 1);
}
}
}
layout = new TextLayout(str.getIterator(), frc);
if(style.getRotation() != 0){
/*
* Transform the text using a scale so that it's height is increased by a multiple of the leading,
* and then rotate the text before computing the bounds. The scale results in some whitespace around
@ -1500,12 +1497,14 @@ public class HSSFSheet
* is added by the standard Excel autosize.
*/
AffineTransform trans = new AffineTransform();
double height = layout.getOutline(trans).getBounds().getHeight();
trans.concatenate(AffineTransform.getRotateInstance(style.getRotation()*2.0*Math.PI/360.0));
trans.concatenate(
AffineTransform.getScaleInstance(1, (layout.getLeading()*rotationLeadingMultiple+height)/height)
AffineTransform.getScaleInstance(1, fontHeightMultiple)
);
width = Math.max(width, layout.getOutline(trans).getBounds().getWidth() / defaultCharWidth);
} else {
width = Math.max(width, layout.getBounds().getWidth() / defaultCharWidth);
}
}
} else {
String sval = null;
@ -1530,10 +1529,12 @@ public class HSSFSheet
sval = String.valueOf(cell.getBooleanCellValue());
}
str = new AttributedString(sval + defaultChar);
str.addAttribute(TextAttribute.FAMILY, font.getFontName());
str.addAttribute(TextAttribute.SIZE, new Float(font.getFontHeightInPoints()));
String txt = sval + defaultChar;
str = new AttributedString(txt);
copyAttributes(font, str, 0, txt.length());
layout = new TextLayout(str.getIterator(), frc);
if(style.getRotation() != 0){
/*
* Transform the text using a scale so that it's height is increased by a multiple of the leading,
* and then rotate the text before computing the bounds. The scale results in some whitespace around
@ -1541,12 +1542,14 @@ public class HSSFSheet
* is added by the standard Excel autosize.
*/
AffineTransform trans = new AffineTransform();
double height = layout.getOutline(trans).getBounds().getHeight();
trans.concatenate(AffineTransform.getRotateInstance(style.getRotation()*2.0*Math.PI/360.0));
trans.concatenate(
AffineTransform.getScaleInstance(1, (layout.getLeading()*rotationLeadingMultiple+height)/height)
AffineTransform.getScaleInstance(1, fontHeightMultiple)
);
width = Math.max(width, layout.getOutline(trans).getBounds().getWidth() / defaultCharWidth);
} else {
width = Math.max(width, layout.getBounds().getWidth() / defaultCharWidth);
}
}
if (width != -1) {
@ -1558,6 +1561,17 @@ public class HSSFSheet
}
}
/**
* Copy text attributes from the supplied HSSFFont to Java2D AttributedString
*/
private void copyAttributes(HSSFFont font, AttributedString str, int startIdx, int endIdx){
str.addAttribute(TextAttribute.FAMILY, font.getFontName(), startIdx, endIdx);
str.addAttribute(TextAttribute.SIZE, new Float(font.getFontHeightInPoints()));
if (font.getBoldweight() == HSSFFont.BOLDWEIGHT_BOLD) str.addAttribute(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD, startIdx, endIdx);
if (font.getItalic() ) str.addAttribute(TextAttribute.POSTURE, TextAttribute.POSTURE_OBLIQUE, startIdx, endIdx);
if (font.getUnderline() == HSSFFont.U_SINGLE ) str.addAttribute(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON, startIdx, endIdx);
}
/**
* Returns cell comment for the specified row and column
*