/**
* Calculate an (approximate) OpenXML column width, based on font size and text contained
*
* @param int $fontSize Font size (in pixels or points)
* @param bool $fontSizeInPixels Is the font size specified in pixels (true) or in points (false) ?
* @param string $cellText Text to calculate width
* @param int $rotation Rotation angle
* @return int Column width
*/
public static function calculateColumnWidth(Style_Font $font, $cellText = '', $rotation = 0, Style_Font $defaultFont = null)
{
// If it is rich text, use plain text
if ($cellText instanceof RichText) {
$cellText = $cellText->getPlainText();
}
// Special case if there are one or more newline characters ("\n")
if (strpos($cellText, "\n") !== false) {
$lineTexts = explode("\n", $cellText);
$lineWitdhs = array();
foreach ($lineTexts as $lineText) {
$lineWidths[] = self::calculateColumnWidth($font, $lineText, $rotation = 0, $defaultFont);
}
return max($lineWidths);
// width of longest line in cell
}
// Try to get the exact text width in pixels
try {
// If autosize method is set to 'approx', use approximation
if (self::$autoSizeMethod == self::AUTOSIZE_METHOD_APPROX) {
throw new Exception('AutoSize method is set to approx');
}
// Width of text in pixels excl. padding
$columnWidth = self::getTextWidthPixelsExact($cellText, $font, $rotation);
// Excel adds some padding, use 1.07 of the width of an 'n' glyph
$columnWidth += ceil(self::getTextWidthPixelsExact('0', $font, 0) * 1.07);
// pixels incl. padding
} catch (Exception $e) {
// Width of text in pixels excl. padding, approximation
$columnWidth = self::getTextWidthPixelsApprox($cellText, $font, $rotation);
// Excel adds some padding, just use approx width of 'n' glyph
$columnWidth += self::getTextWidthPixelsApprox('n', $font, 0);
}
// Convert from pixel width to column width
$columnWidth = Shared_Drawing::pixelsToCellDimension($columnWidth, $defaultFont);
// Return
return round($columnWidth, 6);
}
