1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
"""Test CSS stacking contexts."""
import pytest
from weasyprint.stacking import StackingContext
from .testing_utils import assert_no_logs, render_pages, serialize
z_index_source = '''
<style>
@page { size: 10px }
div, div * { width: 10px; height: 10px; position: absolute }
article { background: red; z-index: %s }
section { background: blue; z-index: %s }
nav { background: lime; z-index: %s }
</style>
<div>
<article></article>
<section></section>
<nav></nav>
</div>'''
def flatten_blocks_and_cells(blocks_and_cells):
for block, blocks_and_cells in blocks_and_cells.items():
yield block.element_tag
yield from flatten_blocks_and_cells(blocks_and_cells)
def serialize_stacking(context):
return (
context.box.element_tag,
list(flatten_blocks_and_cells(context.blocks_and_cells)),
[serialize_stacking(context) for context in context.zero_z_contexts])
@assert_no_logs
@pytest.mark.parametrize(('source', 'contexts'), [
('''
<p id=lorem></p>
<div style="position: relative">
<p id=lipsum></p>
</div>''',
('html', ['body', 'p'], [('div', ['p'], [])])),
('''
<div style="position: relative">
<p style="position: relative"></p>
</div>''',
('html', ['body'], [('div', [], []), ('p', [], [])])),
])
def test_nested(source, contexts):
page, = render_pages(source)
html, = page.children
assert serialize_stacking(StackingContext.from_box(html, page)) == contexts
@assert_no_logs
def test_image_contexts():
page, = render_pages('''
<body>Some text: <img style="position: relative" src=pattern.png>''')
html, = page.children
context = StackingContext.from_box(html, page)
# The image is *not* in this context:
assert serialize([context.box]) == [
('html', 'Block', [
('body', 'Block', [
('body', 'Line', [
('body', 'Text', 'Some text: ')])])])]
# ... but in a sub-context:
assert serialize(c.box for c in context.zero_z_contexts) == [
('img', 'InlineReplaced', '<replaced>')]
@assert_no_logs
@pytest.mark.parametrize(('z_indexes', 'color'), [
((3, 2, 1), 'R'),
((1, 2, 3), 'G'),
((1, 2, -3), 'B'),
((1, 2, 'auto'), 'B'),
((-1, 'auto', -2), 'B'),
])
def test_z_index(assert_pixels, z_indexes, color):
assert_pixels('\n'.join([color * 10] * 10), z_index_source % z_indexes)
|
