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style: remove is_servo(), as_servo() and as_servo_mut()

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This commit adds a need_index prop to the style system, and autogenerates
iterators, and a get_xxx_mod(i) function from a get_xxx_prop() and
get_xxx_at(index) functions.

This allows us to (finally!) take rid of the as_servo() hack. There are a few
unimplemented clones, but I'm just too lazy for that right now.
This commit is contained in:
Emilio Cobos Álvarez 2016-06-30 19:23:07 -07:00
parent ba53c4ea8d
commit 30963dd74d
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GPG key ID: 056B727BB9C1027C
7 changed files with 296 additions and 81 deletions
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7
components/style/properties/data.py
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@ -57,7 +57,6 @@ class Longhand(object):
self.experimental = ("layout.%s.enabled" % name) if experimental else None
self.custom_cascade = custom_cascade
self.internal = internal
self.need_clone = need_clone
self.need_index = need_index
self.gecko_ffi_name = gecko_ffi_name or "m" + self.camel_case
self.derived_from = (derived_from or "").split()
@ -72,6 +71,12 @@ class Longhand(object):
assert animatable == "True" or animatable == "False"
self.animatable = animatable == "True"
# NB: Animatable implies clone because a property animation requires a
# copy of the computed value.
#
# See components/style/helpers/animated_properties.mako.rs.
self.need_clone = need_clone or self.animatable
class Shorthand(object):
def __init__(self, name, sub_properties, experimental=False, internal=False):