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improved handling rotated text in HSSFSheet.autoSizeColumn 

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 80c35b59fd
commit 76b3f602c1
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 * Excel measures columns in units of 1/256th of a character width
* but the docs say nothing about what particular character is used. * 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'; char defaultChar = '0';
/** /**
* This is the multiple of the scale measure that is added to the height * This is the multiple that the font height is scaled by when determining the
* of rotated text. * boundary of rotated text.
*
* TODO: research if this constant works well with different font sizes and different dpi
*/ */
double rotationLeadingMultiple = 40.0; double fontHeightMultiple = 2.0;
FontRenderContext frc = new FontRenderContext(null, true, true); FontRenderContext frc = new FontRenderContext(null, true, true);
@ -1459,8 +1457,7 @@ public class HSSFSheet
HSSFFont defaultFont = wb.getFontAt((short) 0); HSSFFont defaultFont = wb.getFontAt((short) 0);
str = new AttributedString("" + defaultChar); str = new AttributedString("" + defaultChar);
str.addAttribute(TextAttribute.FAMILY, defaultFont.getFontName()); copyAttributes(defaultFont, str, 0, 1);
str.addAttribute(TextAttribute.SIZE, new Float(defaultFont.getFontHeightInPoints()));
layout = new TextLayout(str.getIterator(), frc); layout = new TextLayout(str.getIterator(), frc);
int defaultCharWidth = (int)layout.getAdvance(); int defaultCharWidth = (int)layout.getAdvance();
@ -1477,22 +1474,22 @@ public class HSSFSheet
HSSFRichTextString rt = cell.getRichStringCellValue(); HSSFRichTextString rt = cell.getRichStringCellValue();
String[] lines = rt.getString().split("\\n"); String[] lines = rt.getString().split("\\n");
for (int i = 0; i < lines.length; i++) { for (int i = 0; i < lines.length; i++) {
str = new AttributedString(lines[i] + defaultChar); String txt = lines[i] + defaultChar;
str.addAttribute(TextAttribute.FAMILY, font.getFontName()); str = new AttributedString(txt);
str.addAttribute(TextAttribute.SIZE, new Float(font.getFontHeightInPoints())); copyAttributes(font, str, 0, txt.length());
if (font.getBoldweight() == HSSFFont.BOLDWEIGHT_BOLD) str.addAttribute(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD);
if (rt.numFormattingRuns() > 0) { if (rt.numFormattingRuns() > 0) {
for (int j = 0; j < lines[i].length(); j++) { for (int j = 0; j < lines[i].length(); j++) {
int idx = rt.getFontAtIndex(j); int idx = rt.getFontAtIndex(j);
if (idx != 0) { if (idx != 0) {
HSSFFont fnt = wb.getFontAt((short) idx); HSSFFont fnt = wb.getFontAt((short) idx);
str.addAttribute(TextAttribute.FAMILY, fnt.getFontName(), j, j + 1); copyAttributes(fnt, str, j, j + 1);
str.addAttribute(TextAttribute.SIZE, new Float(fnt.getFontHeightInPoints()), j, j + 1);
} }
} }
} }
layout = new TextLayout(str.getIterator(), frc); 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, * 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 * 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. * is added by the standard Excel autosize.
*/ */
AffineTransform trans = new AffineTransform(); 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.getRotateInstance(style.getRotation()*2.0*Math.PI/360.0));
trans.concatenate( trans.concatenate(
AffineTransform.getScaleInstance(1, (layout.getLeading()*rotationLeadingMultiple+height)/height) AffineTransform.getScaleInstance(1, fontHeightMultiple)
); );
width = Math.max(width, layout.getOutline(trans).getBounds().getWidth() / defaultCharWidth); width = Math.max(width, layout.getOutline(trans).getBounds().getWidth() / defaultCharWidth);
} else {
width = Math.max(width, layout.getBounds().getWidth() / defaultCharWidth);
}
} }
} else { } else {
String sval = null; String sval = null;
@ -1530,10 +1529,12 @@ public class HSSFSheet
sval = String.valueOf(cell.getBooleanCellValue()); sval = String.valueOf(cell.getBooleanCellValue());
} }
str = new AttributedString(sval + defaultChar); String txt = sval + defaultChar;
str.addAttribute(TextAttribute.FAMILY, font.getFontName()); str = new AttributedString(txt);
str.addAttribute(TextAttribute.SIZE, new Float(font.getFontHeightInPoints())); copyAttributes(font, str, 0, txt.length());
layout = new TextLayout(str.getIterator(), frc); 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, * 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 * 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. * is added by the standard Excel autosize.
*/ */
AffineTransform trans = new AffineTransform(); 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.getRotateInstance(style.getRotation()*2.0*Math.PI/360.0));
trans.concatenate( trans.concatenate(
AffineTransform.getScaleInstance(1, (layout.getLeading()*rotationLeadingMultiple+height)/height) AffineTransform.getScaleInstance(1, fontHeightMultiple)
); );
width = Math.max(width, layout.getOutline(trans).getBounds().getWidth() / defaultCharWidth); width = Math.max(width, layout.getOutline(trans).getBounds().getWidth() / defaultCharWidth);
} else {
width = Math.max(width, layout.getBounds().getWidth() / defaultCharWidth);
}
} }
if (width != -1) { 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 * Returns cell comment for the specified row and column
* *