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80 lines
2.2 KiB
Python
80 lines
2.2 KiB
Python
"""Test CSS stacking contexts."""
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import pytest
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from weasyprint.stacking import StackingContext
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from .draw import assert_pixels
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from .testing_utils import assert_no_logs, render_pages, serialize
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z_index_source = '''
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<style>
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@page { size: 10px }
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div, div * { width: 10px; height: 10px; position: absolute }
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article { background: red; z-index: %s }
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section { background: blue; z-index: %s }
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nav { background: lime; z-index: %s }
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</style>
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<div>
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<article></article>
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<section></section>
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<nav></nav>
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</div>'''
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def serialize_stacking(context):
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return (
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context.box.element_tag,
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[b.element_tag for b in context.blocks_and_cells],
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[serialize_stacking(c) for c in context.zero_z_contexts])
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@assert_no_logs
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@pytest.mark.parametrize('source, contexts', (
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('''
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<p id=lorem></p>
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<div style="position: relative">
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<p id=lipsum></p>
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</div>''',
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('html', ['body', 'p'], [('div', ['p'], [])])),
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('''
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<div style="position: relative">
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<p style="position: relative"></p>
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</div>''',
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('html', ['body'], [('div', [], []), ('p', [], [])])),
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))
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def test_nested(source, contexts):
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page, = render_pages(source)
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html, = page.children
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assert serialize_stacking(StackingContext.from_box(html, page)) == contexts
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@assert_no_logs
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def test_image_contexts():
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page, = render_pages('''
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<body>Some text: <img style="position: relative" src=pattern.png>''')
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html, = page.children
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context = StackingContext.from_box(html, page)
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# The image is *not* in this context:
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assert serialize([context.box]) == [
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('html', 'Block', [
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('body', 'Block', [
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('body', 'Line', [
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('body', 'Text', 'Some text: ')])])])]
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# ... but in a sub-context:
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assert serialize(c.box for c in context.zero_z_contexts) == [
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('img', 'InlineReplaced', '<replaced>')]
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@assert_no_logs
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@pytest.mark.parametrize('z_indexes, color', (
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((3, 2, 1), 'R'),
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((1, 2, 3), 'G'),
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((1, 2, -3), 'B'),
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((1, 2, 'auto'), 'B'),
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((-1, 'auto', -2), 'B'),
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))
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def test_z_index(z_indexes, color):
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assert_pixels(
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'z_index_%s_%s_%s' % z_indexes, 10, 10, '\n'.join([color * 10] * 10),
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z_index_source % z_indexes)
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