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Kovid Goyal 2023-01-31 19:26:42 +05:30
parent 33b7c80e29
commit 31b0c321fc
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2 changed files with 19 additions and 14 deletions
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15
src/pyj/read_book/paged_mode.pyj
View File

@ -33,7 +33,7 @@ from read_book.cfi import (
) )
from read_book.globals import current_spine_item, get_boss, rtl_page_progression from read_book.globals import current_spine_item, get_boss, rtl_page_progression
from read_book.settings import opts from read_book.settings import opts
from read_book.viewport import scroll_viewport, line_height, rem_size from read_book.viewport import scroll_viewport, line_height, rem_size, get_unit_size_in_pixels
from utils import ( from utils import (
get_elem_data, set_elem_data get_elem_data, set_elem_data
) )
@ -155,18 +155,7 @@ def cps_by_em_size():
if fs is 0: if fs is 0:
ans = cps_by_em_size.ans = 16 ans = cps_by_em_size.ans = 16
else: else:
d = document.createElement('span') ans = cps_by_em_size.ans = max(2, get_unit_size_in_pixels('rem'))
d.style.position = 'absolute'
d.style.visibility = 'hidden'
d.style.width = '1rem'
d.style.fontSize = '1rem'
d.style.paddingTop = d.style.paddingBottom = d.style.paddingLeft = d.style.paddingRight = '0'
d.style.marginTop = d.style.marginBottom = d.style.marginLeft = d.style.marginRight = '0'
d.style.borderStyle = 'none'
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

18
src/pyj/read_book/viewport.pyj
View File

@ -330,6 +330,22 @@ for attr in FUNCTIONS:
scroll_viewport['paged_' + attr] = scroll_viewport[attr] scroll_viewport['paged_' + attr] = scroll_viewport[attr]
viewport_mode_changer(scroll_viewport.set_mode) viewport_mode_changer(scroll_viewport.set_mode)
def get_unit_size_in_pixels(unit):
d = document.createElement('span')
d.style.position = 'absolute'
d.style.visibility = 'hidden'
d.style.width = f'1{unit}'
d.style.fontSize = f'1{unit}'
d.style.paddingTop = d.style.paddingBottom = d.style.paddingLeft = d.style.paddingRight = '0'
d.style.marginTop = d.style.marginBottom = d.style.marginLeft = d.style.marginRight = '0'
d.style.borderStyle = 'none'
document.body.appendChild(d)
ans = d.clientWidth
document.body.removeChild(d)
return ans
def rem_size(reset): def rem_size(reset):
if reset: if reset:
rem_size.ans = None rem_size.ans = None
@ -344,7 +360,7 @@ def rem_size(reset):
d.style.marginTop = d.style.marginBottom = d.style.marginLeft = d.style.marginRight = '0' d.style.marginTop = d.style.marginBottom = d.style.marginLeft = d.style.marginRight = '0'
d.style.borderStyle = 'none' d.style.borderStyle = 'none'
document.body.appendChild(d) document.body.appendChild(d)
rem_size.ans = d.clientWidth rem_size.ans = max(2, d.clientWidth)
document.body.removeChild(d) document.body.removeChild(d)
return rem_size.ans return rem_size.ans