Kozea/WeasyPrint
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Don't reset layout text when there's no soft hyphens in text

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Setting text is slow and should be avoided when possible. We should probably
avoid get_first_line too and keep the original one here.
This commit is contained in:
Guillaume Ayoub 2019-07-09 16:57:40 +02:00
parent 7d5347f081
commit a27146c9a7
1 changed files with 14 additions and 5 deletions
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13
weasyprint/text.py
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@ -608,19 +608,27 @@ def first_line_metrics(first_line, text, layout, resume_at, space_collapse,
length -= len(hyphenation_character.encode('utf8'))
elif resume_at:
# Set an infinite width as we don't want to break lines when drawing,
# the lines have already been split and the size may differ.
# the lines have already been split and the size may differ. Rendering
# is also much faster when no width is set.
pango.pango_layout_set_width(layout.layout, -1)
# Create layout with final text
first_line_text = utf8_slice(text, slice(length))
# Remove trailing spaces if spaces collapse
if space_collapse:
first_line_text = first_line_text.rstrip(' ')
# Remove soft hyphens
has_soft_hyphens = '\u00ad' in first_line_text
if has_soft_hyphens:
layout.set_text(first_line_text.replace('\u00ad', ''))
first_line, _ = layout.get_first_line()
length = first_line.length if first_line is not None else 0
if has_soft_hyphens:
soft_hyphens = 0
if '\u00ad' in first_line_text:
if first_line_text[0] == '\u00ad':
length += 2 # len('\u00ad'.encode('utf8'))
for i in range(len(layout.text)):
@ -630,6 +638,7 @@ def first_line_metrics(first_line, text, layout, resume_at, space_collapse,
else:
break
length += soft_hyphens * 2 # len('\u00ad'.encode('utf8'))
width, height = get_size(first_line, style)
baseline = units_to_double(pango.pango_layout_get_baseline(layout.layout))
layout.deactivate()