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Use the specificity for @page selectors from cssutils.

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This commit is contained in:
Simon Sapin 2011-12-27 15:57:15 +01:00
parent 71b1563879
commit 267e89e23b
1 changed files with 11 additions and 18 deletions
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29
weasy/css/__init__.py
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@ -67,14 +67,6 @@ PAGE_PSEUDOCLASS_TARGETS = {
None: ['left_page', 'right_page', 'first_left_page', 'first_right_page'],
}
# Specificity of @page pseudo-classes for the cascade.
PAGE_PSEUDOCLASS_SPECIFICITY = {
':first': 10,
':left': 1,
':right': 1,
None: 0,
}
# A test function that returns True if the given property name has an
# initial value that is not always the same when computed.
RE_INITIAL_NOT_COMPUTED = re.compile(
@ -342,8 +334,9 @@ def selector_to_xpath(selector):
return result
def match_selectors(document, selector_list):
"""Get the selectors of ``selector_list`` matching in the ``document``.
def match_selectors(document, rule):
"""Get the elements in ``document`` matched by the select selectors in
``rule``.
Yield ``element, pseudo_element_type, selector_specificity`` tuples.
@ -354,7 +347,7 @@ def match_selectors(document, selector_list):
"""
selectors = []
for selector in selector_list:
for selector in rule.selectorList:
try:
pseudo_type, selector_callable = selector_to_xpath(selector)
except (cssselect.SelectorSyntaxError, cssselect.ExpressionError,
@ -373,8 +366,8 @@ def match_selectors(document, selector_list):
yield element, pseudo_type, specificity
def match_page_selector(selector, margin_type=None):
"""Get the pages matching ``selector``.
def match_page_selector(rule, margin_type=None):
"""Get the page types matching the selector in ``rule``.
Yield ``page_type, margin_type, selector_specificity`` tuples.
``margin_type`` is as passed as an argument.
@ -382,6 +375,7 @@ def match_page_selector(selector, margin_type=None):
Return an empty iterable if the selector is invalid or unsupported.
"""
selector = rule.selectorText
# TODO: support "page names" in page selectors (see CSS3 Paged Media)
pseudo_class = selector or None
page_types = PAGE_PSEUDOCLASS_TARGETS.get(pseudo_class, None)
@ -389,7 +383,7 @@ def match_page_selector(selector, margin_type=None):
LOGGER.warn('Unsupported @page selector %r, the whole rule-set '
'was ignored.', selector)
else:
specificity = PAGE_PSEUDOCLASS_SPECIFICITY[pseudo_class]
specificity = rule.specificity
for page_type in page_types:
yield page_type, margin_type, specificity
@ -514,14 +508,13 @@ def get_all_computed_styles(document, medium,
# expanded once, not for every document.
for rule in effective_rules(sheet, medium):
if rule.type == rule.STYLE_RULE:
matched = match_selectors(document, rule.selectorList)
matched = match_selectors(document, rule)
elif rule.type == rule.PAGE_RULE:
matched = match_page_selector(rule.selectorText)
matched = match_page_selector(rule)
elif rule.type == rule.MARGIN_RULE:
# TODO: refactor this to reuse the result of
# match_page_selector() on the parent @page rule.
matched = match_page_selector(
rule.parent.selectorText, rule.margin)
matched = match_page_selector(rule.parent, rule.margin)
else:
# TODO: handle @font-face, @namespace, and @variables
continue