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Don’t generate PDF with 0-scale transformation matrices for text

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This commit is contained in:
Guillaume Ayoub 2022-04-15 14:53:19 +02:00
parent ac176a8fd4
commit 2e726a3965
2 changed files with 27 additions and 1 deletions
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23
tests/draw/test_text.py
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@ -715,6 +715,29 @@ def test_zero_width_character():
<div>a&zwnj;b</div>''') <div>a&zwnj;b</div>''')
def test_font_size_very_small():
assert_pixels('font_size_very_small', 10, 4, '''
__________
__________
__________
__________
''', '''
<style>
@font-face {src: url(weasyprint.otf); font-family: weasyprint}
@page {
size: 10px 4px;
background: white;
margin: 1px;
}
body {
font-family: weasyprint;
font-size: 0.00000001px;
}
</style>
test font size zero
''')
def test_tabulation_character(): def test_tabulation_character():
# Test regression: https://github.com/Kozea/WeasyPrint/issues/1515 # Test regression: https://github.com/Kozea/WeasyPrint/issues/1515
assert_pixels('zero_width_character', 10, 4, ''' assert_pixels('zero_width_character', 10, 4, '''

5
weasyprint/draw.py
View File

@ -1030,6 +1030,10 @@ def draw_emojis(stream, font_size, x, y, emojis):
def draw_first_line(stream, textbox, text_overflow, block_ellipsis, x, y, def draw_first_line(stream, textbox, text_overflow, block_ellipsis, x, y,
angle=0): angle=0):
"""Draw the given ``textbox`` line to the document ``stream``.""" """Draw the given ``textbox`` line to the document ``stream``."""
font_size = textbox.style['font_size']
if font_size < 1e-6: # Default float precision used by pydyf
return []
pango.pango_layout_set_single_paragraph_mode( pango.pango_layout_set_single_paragraph_mode(
textbox.pango_layout.layout, True) textbox.pango_layout.layout, True)
@ -1072,7 +1076,6 @@ def draw_first_line(stream, textbox, text_overflow, block_ellipsis, x, y,
textbox.pango_layout.set_text(new_text + ellipsis) textbox.pango_layout.set_text(new_text + ellipsis)
first_line, index = textbox.pango_layout.get_first_line() first_line, index = textbox.pango_layout.get_first_line()
font_size = textbox.style['font_size']
utf8_text = textbox.pango_layout.text.encode() utf8_text = textbox.pango_layout.text.encode()
previous_utf8_position = 0 previous_utf8_position = 0