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PDF: Add support for line height (#3066)

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Co-authored-by: Raphael Michel <michel@rami.io>
This commit is contained in:
Richard Schreiber
2023-02-02 19:07:10 +01:00
committed by GitHub
parent 7b301b6027
commit b4e372ce04
4 changed files with 45 additions and 17 deletions
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18
src/pretix/base/pdf.py
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@@ -848,12 +848,17 @@ class Renderer:
'center': TA_CENTER,
'right': TA_RIGHT
}
# lineheight display differs from browser canvas. This calc is just empirical values to get
# reportlab render similarly to browser canvas.
# for backwards compatability use „uncorrected“ lineheight of 1.0 instead of 1.15
lineheight = float(o['lineheight']) * 1.15 if 'lineheight' in o else 1.0
style = ParagraphStyle(
name=uuid.uuid4().hex,
fontName=font,
fontSize=float(o['fontsize']),
leading=float(o['fontsize']),
autoLeading="max",
leading=lineheight * float(o['fontsize']),
# for backwards compatability use autoLeading if no lineheight is given
autoLeading='off' if 'lineheight' in o else 'max',
textColor=Color(o['color'][0] / 255, o['color'][1] / 255, o['color'][2] / 255),
alignment=align_map[o['align']]
)
@@ -882,8 +887,15 @@ class Renderer:
if o.get('downward', False):
canvas.translate(float(o['left']) * mm, float(o['bottom']) * mm)
canvas.rotate(o.get('rotation', 0) * -1)
p.drawOn(canvas, 0, -h - ad[1] / 2)
p.drawOn(canvas, 0, -h - ad[1] / 2.5)
else:
if lineheight != 1.0:
# lineheight adds to ascent/descent offsets, just empirical values again to get
# reportlab to render similarly to browser canvas
ad = (
ad[0],
ad[1] + (lineheight - 1.0) * float(o['fontsize']) * 1.05
)
canvas.translate(float(o['left']) * mm, float(o['bottom']) * mm + h)
canvas.rotate(o.get('rotation', 0) * -1)
p.drawOn(canvas, 0, -h - ad[1])