Esempio n. 1
0
  /**
   * Compute width of a column based on a subset of the rows and return the result
   *
   * @param sheet the sheet to calculate
   * @param column 0-based index of the column
   * @param useMergedCells whether to use merged cells
   * @param firstRow 0-based index of the first row to consider (inclusive)
   * @param lastRow 0-based index of the last row to consider (inclusive)
   * @return the width in pixels
   */
  public static double getColumnWidth(
      Sheet sheet, int column, boolean useMergedCells, int firstRow, int lastRow) {
    AttributedString str;
    TextLayout layout;

    Workbook wb = sheet.getWorkbook();
    DataFormatter formatter = new DataFormatter();
    Font defaultFont = wb.getFontAt((short) 0);

    str = new AttributedString(String.valueOf(defaultChar));
    copyAttributes(defaultFont, str, 0, 1);
    layout = new TextLayout(str.getIterator(), fontRenderContext);
    int defaultCharWidth = (int) layout.getAdvance();

    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);
        width = Math.max(width, cellWidth);
      }
    }
    return width;
  }
Esempio n. 2
0
  /**
   * Compute width of a single cell
   *
   * @param cell 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
   */
  public static double getCellWidth(
      Cell cell, int defaultCharWidth, DataFormatter formatter, boolean useMergedCells) {

    Sheet sheet = cell.getSheet();
    Workbook wb = sheet.getWorkbook();
    Row row = cell.getRow();
    int column = cell.getColumnIndex();

    int colspan = 1;
    for (int i = 0; i < sheet.getNumMergedRegions(); i++) {
      CellRangeAddress region = sheet.getMergedRegion(i);
      if (containsCell(region, row.getRowNum(), column)) {
        if (!useMergedCells) {
          // If we're not using merged cells, skip this one and move on to the next.
          return -1;
        }
        cell = row.getCell(region.getFirstColumn());
        colspan = 1 + region.getLastColumn() - region.getFirstColumn();
      }
    }

    CellStyle style = cell.getCellStyle();
    int cellType = cell.getCellType();

    // for formula cells we compute the cell width for the cached formula result
    if (cellType == Cell.CELL_TYPE_FORMULA) cellType = cell.getCachedFormulaResultType();

    Font font = wb.getFontAt(style.getFontIndex());

    AttributedString str;
    TextLayout layout;

    double width = -1;
    if (cellType == Cell.CELL_TYPE_STRING) {
      RichTextString rt = cell.getRichStringCellValue();
      String[] lines = rt.getString().split("\\n");
      for (int i = 0; i < lines.length; i++) {
        String txt = lines[i] + defaultChar;

        str = new AttributedString(txt);
        copyAttributes(font, str, 0, txt.length());

        if (rt.numFormattingRuns() > 0) {
          // TODO: support rich text fragments
        }

        layout = new TextLayout(str.getIterator(), fontRenderContext);
        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
           * the unrotated top and bottom of the text that normally wouldn't be present if unscaled, but
           * is added by the standard Excel autosize.
           */
          AffineTransform trans = new AffineTransform();
          trans.concatenate(
              AffineTransform.getRotateInstance(style.getRotation() * 2.0 * Math.PI / 360.0));
          trans.concatenate(AffineTransform.getScaleInstance(1, fontHeightMultiple));
          width =
              Math.max(
                  width,
                  ((layout.getOutline(trans).getBounds().getWidth() / colspan) / defaultCharWidth)
                      + cell.getCellStyle().getIndention());
        } else {
          width =
              Math.max(
                  width,
                  ((layout.getBounds().getWidth() / colspan) / defaultCharWidth)
                      + cell.getCellStyle().getIndention());
        }
      }
    } else {
      String sval = null;
      if (cellType == Cell.CELL_TYPE_NUMERIC) {
        // Try to get it formatted to look the same as excel
        try {
          sval = formatter.formatCellValue(cell, dummyEvaluator);
        } catch (Exception e) {
          sval = String.valueOf(cell.getNumericCellValue());
        }
      } else if (cellType == Cell.CELL_TYPE_BOOLEAN) {
        sval = String.valueOf(cell.getBooleanCellValue()).toUpperCase();
      }
      if (sval != null) {
        String txt = sval + defaultChar;
        str = new AttributedString(txt);
        copyAttributes(font, str, 0, txt.length());

        layout = new TextLayout(str.getIterator(), fontRenderContext);
        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
           * the unrotated top and bottom of the text that normally wouldn't be present if unscaled, but
           * is added by the standard Excel autosize.
           */
          AffineTransform trans = new AffineTransform();
          trans.concatenate(
              AffineTransform.getRotateInstance(style.getRotation() * 2.0 * Math.PI / 360.0));
          trans.concatenate(AffineTransform.getScaleInstance(1, fontHeightMultiple));
          width =
              Math.max(
                  width,
                  ((layout.getOutline(trans).getBounds().getWidth() / colspan) / defaultCharWidth)
                      + cell.getCellStyle().getIndention());
        } else {
          width =
              Math.max(
                  width,
                  ((layout.getBounds().getWidth() / colspan) / defaultCharWidth)
                      + cell.getCellStyle().getIndention());
        }
      }
    }
    return width;
  }