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Special case zero font size when calculating columns per screen in paged mode

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Kovid Goyal 2023-01-24 11:55:36 +05:30
parent ce49025770
commit 603dcc777e
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1 changed files with 15 additions and 12 deletions
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27
src/pyj/read_book/paged_mode.pyj
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@ -152,18 +152,21 @@ def cps_by_em_size():
ans = cps_by_em_size.ans ans = cps_by_em_size.ans
fs = window.getComputedStyle(document.body).fontSize fs = window.getComputedStyle(document.body).fontSize
if not ans or cps_by_em_size.at_font_size is not fs: if not ans or cps_by_em_size.at_font_size is not fs:
d = document.createElement('span') if fs is 0:
d.style.position = 'absolute' ans = cps_by_em_size.ans = 16
d.style.visibility = 'hidden' else:
d.style.width = '1rem' d = document.createElement('span')
d.style.fontSize = '1rem' d.style.position = 'absolute'
d.style.paddingTop = d.style.paddingBottom = d.style.paddingLeft = d.style.paddingRight = '0' d.style.visibility = 'hidden'
d.style.marginTop = d.style.marginBottom = d.style.marginLeft = d.style.marginRight = '0' d.style.width = '1rem'
d.style.borderStyle = 'none' d.style.fontSize = '1rem'
document.body.appendChild(d) d.style.paddingTop = d.style.paddingBottom = d.style.paddingLeft = d.style.paddingRight = '0'
w = d.clientWidth d.style.marginTop = d.style.marginBottom = d.style.marginLeft = d.style.marginRight = '0'
document.body.removeChild(d) d.style.borderStyle = 'none'
ans = cps_by_em_size.ans = max(2, w) document.body.appendChild(d)
w = d.clientWidth
document.body.removeChild(d)
ans = cps_by_em_size.ans = max(2, w)
cps_by_em_size.at_font_size = fs cps_by_em_size.at_font_size = fs
return ans return ans