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supporting change for bug 57450 from Stefan Thurnherr 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1712217 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Javen O'Neal 2015-11-03 07:07:11 +00:00
parent 5230eaf6e1
commit 3b88a60498
1 changed files with 44 additions and 15 deletions
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59
src/java/org/apache/poi/ss/util/SheetUtil.java
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@ -207,33 +207,62 @@ public class SheetUtil {
* @return the width in pixels or -1 if cell is empty
*/
public static double getColumnWidth(Sheet sheet, int column, boolean useMergedCells, int firstRow, int lastRow){
Workbook wb = sheet.getWorkbook();
DataFormatter formatter = new DataFormatter();
Font defaultFont = wb.getFontAt((short) 0);
AttributedString str = new AttributedString(String.valueOf(defaultChar));
copyAttributes(defaultFont, str, 0, 1);
TextLayout layout = new TextLayout(str.getIterator(), fontRenderContext);
int defaultCharWidth = (int)layout.getAdvance();
int defaultCharWidth = getDefaultCharWidth(sheet.getWorkbook());
double width = -1;
for (int rowIdx = firstRow; rowIdx <= lastRow; ++rowIdx) {
Row row = sheet.getRow(rowIdx);
if( row != null ) {
Cell cell = row.getCell(column);
if (cell == null) {
continue;
}
double cellWidth = getCellWidth(cell, defaultCharWidth, formatter, useMergedCells);
double cellWidth = getColumnWidthForRow(row, column, defaultCharWidth, formatter, useMergedCells);
width = Math.max(width, cellWidth);
}
}
return width;
}
/**
* Get default character width
*
* @param wb the workbook to get the default character width from
* @return default character width
*/
private static int getDefaultCharWidth(final Workbook wb) {
Font defaultFont = wb.getFontAt((short) 0);
AttributedString str = new AttributedString(String.valueOf(defaultChar));
copyAttributes(defaultFont, str, 0, 1);
TextLayout layout = new TextLayout(str.getIterator(), fontRenderContext);
int defaultCharWidth = (int) layout.getAdvance();
return defaultCharWidth;
}
/**
* Compute width of a single cell in a row
* Convenience method for {@link getCellWidth}
*
* @param row the row that contains the cell of interest
* @param column the column number of the cell whose width is to be calculated
* @param defaultCharWidth the width of a single character
* @param formatter formatter used to prepare the text to be measured
* @param useMergedCells whether to use merged cells
* @return the width in pixels or -1 if cell is empty
*/
private static double getColumnWidthForRow(
Row row, int column, int defaultCharWidth, DataFormatter formatter, boolean useMergedCells) {
if( row == null ) {
return -1;
}
Cell cell = row.getCell(column);
if (cell == null) {
return -1;
}
return getCellWidth(cell, defaultCharWidth, formatter, useMergedCells);
}
/**
* Check if the Fonts are installed correctly so that Java can compute the size of
* columns.