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Function to resolve pseudo-element properties

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This commit is contained in:
Kovid Goyal 2016-04-12 14:51:24 +05:30
parent 91c85b351c
commit a853e4dac0
2 changed files with 39 additions and 4 deletions
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18
src/calibre/ebooks/oeb/polish/cascade.py
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@ -137,6 +137,12 @@ def resolve_declarations(decls):
ans[name] = first_val
return ans
def resolve_pseudo_declarations(decls):
groups = defaultdict(list)
for d in decls:
groups[d.pseudo_element].append(d)
return {k:resolve_declarations(v) for k, v in groups.iteritems()}
def resolve_styles(container, name, select=None, sheet_callback=None):
root = container.parsed(name)
select = select or Select(root, ignore_inappropriate_pseudo_classes=True)
@ -200,7 +206,7 @@ def resolve_styles(container, name, select=None, sheet_callback=None):
x.sort(key=itemgetter(0), reverse=True)
style_map = {elem:resolve_declarations(x) for elem, x in style_map.iteritems()}
pseudo_style_map = {elem:resolve_declarations(x) for elem, x in pseudo_style_map.iteritems()}
pseudo_style_map = {elem:resolve_pseudo_declarations(x) for elem, x in pseudo_style_map.iteritems()}
return style_map, pseudo_style_map, select
@ -230,3 +236,13 @@ def resolve_property(elem, name, style_map):
return val
q = q.getparent() if inheritable else None
return defvals().get(name)
def resolve_pseudo_property(elem, prop, name, pseudo_style_map):
style_map = pseudo_style_map.get(elem)
if style_map is not None:
prop_map = style_map.get(prop)
if prop_map is not None:
val = prop_map.get(name)
if val is not None:
return val
return defvals().get(name)

25
src/calibre/ebooks/oeb/polish/tests/cascade.py
View File

@ -10,7 +10,7 @@ from functools import partial
from calibre.constants import iswindows
from calibre.ebooks.oeb.base import OEB_STYLES, OEB_DOCS
from calibre.ebooks.oeb.polish.cascade import iterrules, resolve_property, resolve_styles, DEFAULTS
from calibre.ebooks.oeb.polish.cascade import iterrules, resolve_property, resolve_styles, DEFAULTS, resolve_pseudo_property
from calibre.ebooks.oeb.polish.container import ContainerBase, href_to_name
from calibre.ebooks.oeb.polish.tests.base import BaseTest
from calibre.utils.logging import Log, Stream
@ -72,11 +72,21 @@ class CascadeTest(BaseTest):
val = type('')(DEFAULTS[name])
self.assertEqual(val, ans.cssText)
def get_maps(html, styles=None):
def test_pseudo_property(select, pseudo_style_map, selector, prop, name, val=None):
elem = next(select(selector))
ans = resolve_pseudo_property(elem, prop, name, pseudo_style_map)
if val is None:
val = type('')(DEFAULTS[name])
self.assertEqual(val, ans.cssText)
def get_maps(html, styles=None, pseudo=False):
html = '<html><head><link href="styles.css"></head><body>{}</body></html>'.format(html)
c = VirtualContainer({'index.html':html, 'styles.css':styles or 'body { color: red; font-family: "Kovid Goyal", sans-serif }'})
style_map, pseudo_style_map, select = resolve_styles(c, 'index.html')
tp = partial(test_property, select, style_map)
if pseudo:
tp = partial(test_pseudo_property, select, pseudo_style_map)
else:
tp = partial(test_property, select, style_map)
return tp
t = get_maps('<p style="margin:11pt"><b>x</b>xx</p>')
@ -104,3 +114,12 @@ class CascadeTest(BaseTest):
t('p', 'color', 'blue')
t = get_maps('<p>xxx</p><style>p {color: blue}</style>', 'p {color: red; margin:11pt}')
t('p', 'margin-top', '11pt')
t = get_maps('<p></p>', 'p:before { content: "xxx" }', True)
t('p', 'before', 'content', '"xxx"')
t = get_maps('<p></p>', 'body p:before { content: "xxx" } p:before { content: "yyy" }', True)
t('p', 'before', 'content', '"xxx"')
t = get_maps('<p></p>', "p:before { content: 'xxx' } p:first-letter { font-weight: bold }", True)
t('p', 'before', 'content', '"xxx"')
t('p', 'first-letter', 'font-weight', 'bold')
t = get_maps('<p></p>', 'p:before { content: xxx }', True)
t('p', 'before', 'content', 'xxx')