Fix StyledParagraph wrapping issue when used inside table cell

pdf/creator/styled_paragraph.go

@@ -238,6 +238,19 @@ func (p *StyledParagraph) getTextWidth() float64 {
 	return width
 }
 
+// getTextHeight calculates the text height as if all in one line (not taking wrapping into account).
+func (p *StyledParagraph) getTextHeight() float64 {
+	var height float64
+	for _, chunk := range p.chunks {
+		h := chunk.Style.FontSize * p.lineHeight
+		if h > height {
+			height = h
+		}
+	}
+
+	return height
+}
+
 // wrapText splits text into lines. It uses a simple greedy algorithm to wrap
 // fill the lines.
 // XXX/TODO: Consider the Knuth/Plass algorithm or an alternative.

pdf/creator/table.go

@@ -210,6 +210,19 @@ func (table *Table) GeneratePageBlocks(ctx DrawContext) ([]*Block, DrawContext,
 				// Add diff to last row.
 				table.rowHeights[cell.row+cell.rowspan-2] += diffh
 			}
+		case *StyledParagraph:
+			sp := t
+			if sp.enableWrap {
+				sp.SetWidth(w - cell.indent)
+			}
+
+			newh := sp.Height() + sp.margins.bottom + sp.margins.bottom
+			newh += 0.5 * sp.getTextHeight() // TODO: Make the top margin configurable?
+			if newh > h {
+				diffh := newh - h
+				// Add diff to last row.
+				table.rowHeights[cell.row+cell.rowspan-2] += diffh
+			}
 		case *Image:
 			img := t
 			newh := img.Height() + img.margins.top + img.margins.bottom