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style: Add support for property value aliases.

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For keyword-typed properties with aliases but no extra_specified values,
the storage of the specified and computed values could be the same,
since value aliases are resolved at parse time.  But to prevent
computed_value::T::parse from recognizing these aliases, we keep the
specified and computed value types distinct.
This commit is contained in:
Cameron McCormack 2017-04-15 20:10:02 +10:00
parent 533853fdce
commit 10f2d3c38e
3 changed files with 103 additions and 13 deletions
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31
components/style/properties/data.py
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@ -33,10 +33,20 @@ def to_camel_case(ident):
return re.sub("(^|_|-)([a-z])", lambda m: m.group(2).upper(), ident.strip("_").strip("-"))
def parse_aliases(value):
aliases = {}
for pair in value.split():
[a, v] = pair.split("=")
aliases[a] = v
return aliases
class Keyword(object):
def __init__(self, name, values, gecko_constant_prefix=None,
gecko_enum_prefix=None, custom_consts=None,
extra_gecko_values=None, extra_servo_values=None,
aliases=None,
extra_gecko_aliases=None, extra_servo_aliases=None,
gecko_strip_moz_prefix=True,
gecko_inexhaustive=None):
self.name = name
@ -48,6 +58,9 @@ class Keyword(object):
self.gecko_enum_prefix = gecko_enum_prefix
self.extra_gecko_values = (extra_gecko_values or "").split()
self.extra_servo_values = (extra_servo_values or "").split()
self.aliases = parse_aliases(aliases or "")
self.extra_gecko_aliases = parse_aliases(extra_gecko_aliases or "")
self.extra_servo_aliases = parse_aliases(extra_servo_aliases or "")
self.consts_map = {} if custom_consts is None else custom_consts
self.gecko_strip_moz_prefix = gecko_strip_moz_prefix
self.gecko_inexhaustive = gecko_inexhaustive or (gecko_enum_prefix is None)
@ -58,6 +71,16 @@ class Keyword(object):
def servo_values(self):
return self.values + self.extra_servo_values
def gecko_aliases(self):
aliases = self.aliases.copy()
aliases.update(self.extra_gecko_aliases)
return aliases
def servo_aliases(self):
aliases = self.aliases.copy()
aliases.update(self.extra_servo_aliases)
return aliases
def values_for(self, product):
if product == "gecko":
return self.gecko_values()
@ -66,6 +89,14 @@ class Keyword(object):
else:
raise Exception("Bad product: " + product)
def aliases_for(self, product):
if product == "gecko":
return self.gecko_aliases()
elif product == "servo":
return self.servo_aliases()
else:
raise Exception("Bad product: " + product)
def gecko_constant(self, value):
moz_stripped = value.replace("-moz-", '') if self.gecko_strip_moz_prefix else value.replace("-moz-", 'moz-')
mapped = self.consts_map.get(value)