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Make code to parse PDF page sizes re-useable

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Kovid Goyal 2019-10-30 09:42:07 +05:30
parent 21afbdc1d6
commit 6dc53379ee
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 21 additions and 17 deletions
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38
src/calibre/ebooks/pdf/image_writer.py
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@ -40,6 +40,26 @@ class PDFMetadata(object): # {{{
# Page layout {{{ # Page layout {{{
def parse_pdf_page_size(spec, unit='inch', dpi=72.0):
width, sep, height = spec.lower().partition('x')
if height:
try:
width = float(width.replace(',', '.'))
height = float(height.replace(',', '.'))
except Exception:
pass
else:
if unit == 'devicepixel':
factor = 72.0 / dpi
else:
factor = {
'point':1.0, 'inch':inch, 'cicero':cicero,
'didot':didot, 'pica':pica, 'millimeter':mm,
'centimeter':cm
}.get(unit, 1.0)
return QPageSize(QSize(factor*width, factor*height), matchPolicy=QPageSize.ExactMatch)
def get_page_size(opts, for_comic=False): def get_page_size(opts, for_comic=False):
use_profile = opts.use_profile_size and opts.output_profile.short_name != 'default' and opts.output_profile.width <= 9999 use_profile = opts.use_profile_size and opts.output_profile.short_name != 'default' and opts.output_profile.width <= 9999
if use_profile: if use_profile:
@ -53,23 +73,7 @@ def get_page_size(opts, for_comic=False):
else: else:
page_size = None page_size = None
if opts.custom_size is not None: if opts.custom_size is not None:
width, sep, height = opts.custom_size.partition('x') page_size = parse_pdf_page_size(opts.custom_size, opts.unit, opts.output_profile.dpi)
if height:
try:
width = float(width.replace(',', '.'))
height = float(height.replace(',', '.'))
except:
pass
else:
if opts.unit == 'devicepixel':
factor = 72.0 / opts.output_profile.dpi
else:
factor = {
'point':1.0, 'inch':inch, 'cicero':cicero,
'didot':didot, 'pica':pica, 'millimeter':mm,
'centimeter':cm
}[opts.unit]
page_size = QPageSize(QSize(factor*width, factor*height), matchPolicy=QPageSize.ExactMatch)
if page_size is None: if page_size is None:
page_size = QPageSize(getattr(QPageSize, opts.paper_size.capitalize())) page_size = QPageSize(getattr(QPageSize, opts.paper_size.capitalize()))
return page_size return page_size