/**
* @param Text $element
*
* @return mixed[] [float $x, float $y, ZendAbstractFont $font]
*/
private function computeTextPos(Text $element, ZendAbstractFont $font)
{
$fontStyle = $element->getFontStyle();
$scale = $fontStyle->getSize() / (double) $font->getUnitsPerEm();
$x = $element->getX();
$y = $element->getY();
switch ($fontStyle->getHAlign()) {
case FontStyle::HORIZONTAL_ALIGN_MIDDLE:
$glyphNumbers = $font->glyphNumbersForCharacters(TextUtils::getCodes($element->getText()));
$x -= 0.5 * $scale * array_sum($font->widthsForGlyphs($glyphNumbers));
break;
case FontStyle::HORIZONTAL_ALIGN_RIGHT:
$glyphNumbers = $font->glyphNumbersForCharacters(TextUtils::getCodes($element->getText()));
$x -= $scale * array_sum($font->widthsForGlyphs($glyphNumbers));
break;
}
switch ($fontStyle->getVAlign()) {
case FontStyle::VERTICAL_ALIGN_TOP:
$y -= $scale * ($font->getAscent() - $font->getDescent());
break;
case FontStyle::VERTICAL_ALIGN_CENTRAL:
$y -= 0.5 * $scale * $font->getAscent();
break;
case FontStyle::VERTICAL_ALIGN_BOTTOM:
$y -= $scale * ($font->getDescent() + $font->getDescent());
break;
}
return [$x, $y];
}