/**
* Compute column widths of the XWPF table.
*
* @param table
* @return
*/
public static float[] computeColWidths(XWPFTable table) {
XWPFTableRow firstRow = getFirstRow(table);
float[] colWidths;
// Get first row to know if there is cell which have gridSpan to compute
// columns number.
int nbCols = getNumberOfColumns(firstRow);
// Compare nbCols computed with number of grid colList
CTTblGrid grid = table.getCTTbl().getTblGrid();
List<CTTblGridCol> cols = grid.getGridColList();
if (nbCols > cols.size()) {
Collection<Float> maxColWidths = null;
Collection<Float> currentColWidths = null;
// nbCols computed is not equals to number of grid colList
// columns width must be computed by looping for each row/cells
List<XWPFTableRow> rows = table.getRows();
for (XWPFTableRow row : rows) {
currentColWidths = computeColWidths(row);
if (maxColWidths == null) {
maxColWidths = currentColWidths;
} else {
if (currentColWidths.size() > maxColWidths.size()) {
maxColWidths = currentColWidths;
}
}
}
colWidths = new float[maxColWidths.size()];
int i = 0;
for (Float colWidth : maxColWidths) {
colWidths[i++] = colWidth;
}
return colWidths;
} else {
// If w:gridAfter is defined, ignore the last columns defined on the gridColumn
int nbColumnsToIgnoreBefore = getNbColumnsToIgnore(firstRow, true);
int nbColumnsToIgnoreAfter = getNbColumnsToIgnore(firstRow, false);
int nbColumns = cols.size() - nbColumnsToIgnoreBefore - nbColumnsToIgnoreAfter;
// nbCols computed is equals to number of grid colList
// columns width can be computed by using the grid colList
colWidths = new float[nbColumns];
float colWidth = -1;
for (int i = nbColumnsToIgnoreBefore; i < colWidths.length; i++) {
CTTblGridCol tblGridCol = cols.get(i);
colWidth = tblGridCol.getW().floatValue();
colWidths[i] = dxa2points(colWidth);
}
}
return colWidths;
}
/**
* <w:gridCol list should be filtered to ignore negative value.
*
* <p>Ex : <w:gridCol w:w="-54" /> should be ignored. See
* https://code.google.com/p/xdocreport/issues/detail?id=315
*
* @param grid
* @return
*/
private static List<CTTblGridCol> getGridColList(CTTblGrid grid) {
List<CTTblGridCol> newCols = new ArrayList<CTTblGridCol>();
List<CTTblGridCol> cols = grid.getGridColList();
for (CTTblGridCol col : cols) {
if (col.getW().floatValue() >= 0) {
newCols.add(col);
}
}
return newCols;
}