bug 61454: add column width to example Spreadsheet ToHtml; thanks to Christian Froehler
git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1808816 13f79535-47bb-0310-9956-ffa450edef68
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@ -30,6 +30,7 @@ import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeMap;
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import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
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@ -95,6 +96,10 @@ public class ToHtml {
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BorderStyle.SLANTED_DASH_DOT, "dashed 2pt",
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BorderStyle.THICK, "solid 3pt",
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BorderStyle.THIN, "dashed 1pt");
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private static final int IDX_TABLE_WIDTH = -2;
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private static final int IDX_HEADER_COL_WIDTH = -1;
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@SuppressWarnings({"unchecked"})
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private static <K, V> Map<K, V> mapFor(Object... mapping) {
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@ -355,17 +360,61 @@ public class ToHtml {
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public void printSheet(Sheet sheet) {
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ensureOut();
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out.format("<table class=%s>%n", DEFAULTS_CLASS);
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printCols(sheet);
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Map<Integer, Integer> widths = computeWidths(sheet);
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int tableWidth = widths.get(IDX_TABLE_WIDTH);
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out.format("<table class=%s style=\"width:%dpx;\">%n", DEFAULTS_CLASS, tableWidth);
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printCols(widths);
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printSheetContent(sheet);
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out.format("</table>%n");
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}
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/**
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* computes the column widths, defined by the sheet.
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*
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* @param sheet
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* @return Map with key: column index; value: column width in pixels
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* <br>special keys:
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* <br>{@link #IDX_HEADER_COL_WIDTH} - width of the header column
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* <br>{@link #IDX_TABLE_WIDTH} - width of the entire table
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*/
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private Map<Integer, Integer> computeWidths(Sheet sheet) {
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Map<Integer, Integer> ret = new TreeMap<Integer, Integer>();
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int tableWidth = 0;
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private void printCols(Sheet sheet) {
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out.format("<col/>%n");
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ensureColumnBounds(sheet);
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// compute width of the header column
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int lastRowNum = sheet.getLastRowNum();
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int headerCharCount = String.valueOf(lastRowNum).length();
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int headerColWidth = widthToPixels((headerCharCount + 1) * 256);
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ret.put(IDX_HEADER_COL_WIDTH, headerColWidth);
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tableWidth += headerColWidth;
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for (int i = firstColumn; i < endColumn; i++) {
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out.format("<col/>%n");
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int colWidth = poiWidthToPixels(sheet.getColumnWidth(i));
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ret.put(i, colWidth);
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tableWidth += colWidth;
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}
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ret.put(IDX_TABLE_WIDTH, tableWidth);
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return ret ;
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}
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/**
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* Probably platform-specific, but appears to be a close approximation on some systems
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* @param widthUnits POI's native width unit (twips)
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* @return the approximate number of pixels for a typical display
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*/
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protected int widthToPixels(final double widthUnits) {
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return (int) (Math.round(widthUnits * 9 / 256));
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}
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private void printCols(Map<Integer, Integer> widths) {
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int headerColWidth = widths.get(IDX_HEADER_COL_WIDTH);
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out.format("<col style=\"width:%dpx\"/>%n", headerColWidth);
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for (int i = firstColumn; i < endColumn; i++) {
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int colWidth = widths.get(i);
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out.format("<col style=\"width:%dpx;\"/>%n", colWidth);
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}
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}
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@ -462,4 +511,4 @@ public class ToHtml {
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}
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return "";
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}
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}
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}
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@ -30,7 +30,7 @@
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text-indent: 0;
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letter-spacing: 0;
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word-spacing: 0;
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white-space: normal;
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white-space: pre-wrap;
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unicode-bidi: normal;
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vertical-align: 0;
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background-image: none;
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@ -40,7 +40,6 @@
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padding: 0;
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margin: 0;
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border-collapse: collapse;
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white-space: pre;
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vertical-align: bottom;
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font-style: normal;
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font-family: sans-serif;
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@ -48,6 +47,9 @@
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font-weight: normal;
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font-size: 10pt;
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text-align: right;
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table-layout: fixed;
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word-wrap: break-word;
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overflow-wrap: break-word;
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}
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.excelDefaults td {
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