func (b *TextBox) getRotation(doc documents.Document) (rotationX float64, rotationY float64) {
if b.Width == 0 {
pageWidth, _ := doc.GetPageSize()
leftMargin, _, rightMargin, _ := doc.GetMargins()
rotationX = (pageWidth - leftMargin - rightMargin - b.Position.X) / 2
} else {
rotationX = b.Position.X + b.Width/2
}
if b.Height == 0 {
rotationY = b.Position.Y + doc.PointConvert(b.Font.LineHeight)/2
} else {
rotationY = b.Position.Y + b.Height/2
}
return
}
// Parse puts the text on a specific position on the page.
func (b *TextBox) Parse(doc documents.Document) {
b.Font.Register(doc)
if b.Rotation != 0 {
doc.TransformBegin()
rotationX, rotationY := b.getRotation(doc)
doc.TransformRotate(b.Rotation, rotationX, rotationY)
}
if b.Text != "" {
b.setPosition(doc)
doc.MultiCell(b.Width, doc.PointConvert(b.Font.LineHeight), b.Text, "", b.Align, b.Fill)
}
if b.HTML != "" {
leftMargin, topMargin, rightMargin, _ := doc.GetMargins()
doc.SetLeftMargin(leftMargin + b.Position.X)
doc.SetY(b.Position.Y + topMargin)
if b.Width > 0 {
pageWidth, _ := doc.GetPageSize()
rm := pageWidth - rightMargin - (b.Position.X + b.Width)
doc.SetRightMargin(rm)
}
html := doc.HTMLBasicNew()
html.Write(doc.PointConvert(b.Font.LineHeight), b.HTML)
doc.SetLeftMargin(leftMargin)
doc.SetRightMargin(rightMargin)
}
if b.Rotation != 0 {
doc.TransformEnd()
}
}