hocr: avoid division by zero

Issue #253 - PDF that produces the error is not available, but if font_width is zero, chances are the text is nonprinting characters, so suppress it.
2018-04-14 17:24:21 -07:00
parent 7fc897e6dc
commit 2482296e2b
1 changed files with 5 additions and 2 deletions
@@ -322,8 +322,11 @@ class HocrTransform():
            dy = baseline_y2 - cursor[1]            
            text.moveCursor(dx, dy)

-            text.setHorizScale(100 * box_width / font_width)
-            text.textOut(elemtxt)
+            # If reportlab tells us this word is 0 units wide, our best seems
+            # to be to suppress this text
+            if font_width > 0:
+                text.setHorizScale(100 * box_width / font_width)
+                text.textOut(elemtxt)
        pdf.drawText(text)