/**
* @param Style $styleToUpdate (passed as reference)
* @param Style $baseStyle
* @return void
*/
private function mergeFontStyles($styleToUpdate, $baseStyle)
{
if (!$this->hasSetFontBold && $baseStyle->isFontBold()) {
$styleToUpdate->setFontBold();
}
if (!$this->hasSetFontItalic && $baseStyle->isFontItalic()) {
$styleToUpdate->setFontItalic();
}
if (!$this->hasSetFontUnderline && $baseStyle->isFontUnderline()) {
$styleToUpdate->setFontUnderline();
}
if (!$this->hasSetFontStrikethrough && $baseStyle->isFontStrikethrough()) {
$styleToUpdate->setFontStrikethrough();
}
}