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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
import re
from counted_unknown_properties import COUNTED_UNKNOWN_PROPERTIES
# It is important that the order of these physical / logical variants matches
# the order of the enum variants in logical_geometry.rs
PHYSICAL_SIDES = ["top", "right", "bottom", "left"]
PHYSICAL_CORNERS = ["top-left", "top-right", "bottom-right", "bottom-left"]
PHYSICAL_AXES = ["y", "x"]
PHYSICAL_SIZES = ["height", "width"]
LOGICAL_SIDES = ["block-start", "block-end", "inline-start", "inline-end"]
LOGICAL_CORNERS = ["start-start", "start-end", "end-start", "end-end"]
LOGICAL_SIZES = ["block-size", "inline-size"]
LOGICAL_AXES = ["block", "inline"]
# bool is True when logical
ALL_SIDES = [(side, False) for side in PHYSICAL_SIDES] + [
(side, True) for side in LOGICAL_SIDES
]
ALL_SIZES = [(size, False) for size in PHYSICAL_SIZES] + [
(size, True) for size in LOGICAL_SIZES
]
ALL_CORNERS = [(corner, False) for corner in PHYSICAL_CORNERS] + [
(corner, True) for corner in LOGICAL_CORNERS
]
ALL_AXES = [(axis, False) for axis in PHYSICAL_AXES] + [
(axis, True) for axis in LOGICAL_AXES
]
SYSTEM_FONT_LONGHANDS = """font_family font_size font_style
font_stretch font_weight""".split()
PRIORITARY_PROPERTIES = set(
[
# The writing-mode group has the most priority of all property groups, as
# sizes like font-size can depend on it.
"writing-mode",
"direction",
"text-orientation",
# The fonts and colors group has the second priority, as all other lengths
# and colors depend on them.
#
# There are some interdependencies between these, but we fix them up in
# Cascade::fixup_font_stuff.
# Needed to properly compute the zoomed font-size.
"-x-text-scale",
# Needed to do font-size computation in a language-dependent way.
"-x-lang",
# Needed for ruby to respect language-dependent min-font-size
"-moz-min-font-size-ratio",
# font-size depends on math-depth's computed value.
"math-depth",
# Needed to compute the first available font and its used size,
# in order to compute font-relative units correctly.
"font-size",
"font-size-adjust",
"font-weight",
"font-stretch",
"font-style",
"font-family",
# color-scheme affects how system colors resolve.
"color-scheme",
# forced-color-adjust affects whether colors are adjusted.
"forced-color-adjust",
# Zoom affects all absolute lengths.
"zoom",
# Line height lengths depend on this.
"line-height",
]
)
VISITED_DEPENDENT_PROPERTIES = set(
[
"column-rule-color",
"text-emphasis-color",
"-webkit-text-fill-color",
"-webkit-text-stroke-color",
"text-decoration-color",
"fill",
"stroke",
"caret-color",
"background-color",
"border-top-color",
"border-right-color",
"border-bottom-color",
"border-left-color",
"border-block-start-color",
"border-inline-end-color",
"border-block-end-color",
"border-inline-start-color",
"outline-color",
"color",
]
)
# Bitfield values for all rule types which can have property declarations.
STYLE_RULE = 1 << 0
PAGE_RULE = 1 << 1
KEYFRAME_RULE = 1 << 2
ALL_RULES = STYLE_RULE | PAGE_RULE | KEYFRAME_RULE
DEFAULT_RULES = STYLE_RULE | KEYFRAME_RULE
DEFAULT_RULES_AND_PAGE = DEFAULT_RULES | PAGE_RULE
DEFAULT_RULES_EXCEPT_KEYFRAME = STYLE_RULE
# Rule name to value dict
RULE_VALUES = {
"Style": STYLE_RULE,
"Page": PAGE_RULE,
"Keyframe": KEYFRAME_RULE,
}
def rule_values_from_arg(that):
if isinstance(that, int):
return that
mask = 0
for rule in that.split():
mask |= RULE_VALUES[rule]
return mask
def maybe_moz_logical_alias(engine, side, prop):
if engine == "gecko" and side[1]:
axis, dir = side[0].split("-")
if axis == "inline":
return prop % dir
return None
def to_rust_ident(name):
name = name.replace("-", "_")
if name in ["static", "super", "box", "move"]: # Rust keywords
name += "_"
return name
def to_snake_case(ident):
return re.sub("([A-Z]+)", lambda m: "_" + m.group(1).lower(), ident).strip("_")
def to_camel_case(ident):
return re.sub(
"(^|_|-)([a-z0-9])", lambda m: m.group(2).upper(), ident.strip("_").strip("-")
)
def to_camel_case_lower(ident):
camel = to_camel_case(ident)
return camel[0].lower() + camel[1:]
def to_idl_name(ident):
return re.sub("-([a-z])", lambda m: m.group(1).upper(), ident)
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,
gecko_aliases=None,
servo_aliases=None,
gecko_strip_moz_prefix=None,
gecko_inexhaustive=None,
):
self.name = name
self.values = values.split()
if gecko_constant_prefix and gecko_enum_prefix:
raise TypeError(
"Only one of gecko_constant_prefix and gecko_enum_prefix "
"can be specified"
)
self.gecko_constant_prefix = (
gecko_constant_prefix or "NS_STYLE_" + self.name.upper().replace("-", "_")
)
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.gecko_aliases = parse_aliases(gecko_aliases or "")
self.servo_aliases = parse_aliases(servo_aliases or "")
self.consts_map = {} if custom_consts is None else custom_consts
self.gecko_strip_moz_prefix = (
True if gecko_strip_moz_prefix is None else gecko_strip_moz_prefix
)
self.gecko_inexhaustive = gecko_inexhaustive or (gecko_enum_prefix is None)
def values_for(self, engine):
if engine == "gecko":
return self.values + self.extra_gecko_values
elif engine == "servo":
return self.values + self.extra_servo_values
else:
raise Exception("Bad engine: " + engine)
def aliases_for(self, engine):
if engine == "gecko":
return self.gecko_aliases
elif engine == "servo":
return self.servo_aliases
else:
raise Exception("Bad engine: " + engine)
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)
if self.gecko_enum_prefix:
parts = moz_stripped.replace("-", "_").split("_")
parts = mapped if mapped else [p.title() for p in parts]
return self.gecko_enum_prefix + "::" + "".join(parts)
else:
suffix = mapped if mapped else moz_stripped.replace("-", "_")
return self.gecko_constant_prefix + "_" + suffix.upper()
def needs_cast(self):
return self.gecko_enum_prefix is None
def maybe_cast(self, type_str):
return "as " + type_str if self.needs_cast() else ""
def casted_constant_name(self, value, cast_type):
if cast_type is None:
raise TypeError("We should specify the cast_type.")
if self.gecko_enum_prefix is None:
return cast_type.upper() + "_" + self.gecko_constant(value)
else:
return (
cast_type.upper()
+ "_"
+ self.gecko_constant(value).upper().replace("::", "_")
)
def arg_to_bool(arg):
if isinstance(arg, bool):
return arg
assert arg in ["True", "False"], "Unexpected value for boolean arguement: " + repr(
arg
)
return arg == "True"
def parse_property_aliases(alias_list):
result = []
if alias_list:
for alias in alias_list.split():
(name, _, pref) = alias.partition(":")
result.append((name, pref))
return result
def to_phys(name, logical, physical):
return name.replace(logical, physical).replace("inset-", "")
class Property(object):
def __init__(
self,
name,
spec,
servo_pref,
gecko_pref,
enabled_in,
rule_types_allowed,
aliases,
extra_prefixes,
flags,
):
self.name = name
if not spec:
raise TypeError("Spec should be specified for " + name)
self.spec = spec
self.ident = to_rust_ident(name)
self.camel_case = to_camel_case(self.ident)
self.servo_pref = servo_pref
self.gecko_pref = gecko_pref
self.rule_types_allowed = rule_values_from_arg(rule_types_allowed)
# For enabled_in, the setup is as follows:
# It needs to be one of the four values: ["", "ua", "chrome", "content"]
# * "chrome" implies "ua", and implies that they're explicitly
# enabled.
# * "" implies the property will never be parsed.
# * "content" implies the property is accessible unconditionally,
# modulo a pref, set via servo_pref / gecko_pref.
assert enabled_in in ("", "ua", "chrome", "content")
self.enabled_in = enabled_in
self.aliases = parse_property_aliases(aliases)
self.extra_prefixes = parse_property_aliases(extra_prefixes)
self.flags = flags.split() if flags else []
def rule_types_allowed_names(self):
for name in RULE_VALUES:
if self.rule_types_allowed & RULE_VALUES[name] != 0:
yield name
def experimental(self, engine):
if engine == "gecko":
return bool(self.gecko_pref)
elif engine == "servo":
return bool(self.servo_pref)
else:
raise Exception("Bad engine: " + engine)
def explicitly_enabled_in_ua_sheets(self):
return self.enabled_in in ("ua", "chrome")
def explicitly_enabled_in_chrome(self):
return self.enabled_in == "chrome"
def enabled_in_content(self):
return self.enabled_in == "content"
def is_visited_dependent(self):
return self.name in VISITED_DEPENDENT_PROPERTIES
def is_prioritary(self):
return self.name in PRIORITARY_PROPERTIES
def nscsspropertyid(self):
return "nsCSSPropertyID::eCSSProperty_" + self.ident
class Longhand(Property):
def __init__(
self,
style_struct,
name,
spec=None,
animation_value_type=None,
keyword=None,
predefined_type=None,
servo_pref=None,
gecko_pref=None,
enabled_in="content",
need_index=False,
gecko_ffi_name=None,
has_effect_on_gecko_scrollbars=None,
rule_types_allowed=DEFAULT_RULES,
cast_type="u8",
logical=False,
logical_group=None,
aliases=None,
extra_prefixes=None,
boxed=False,
flags=None,
allow_quirks="No",
ignored_when_colors_disabled=False,
simple_vector_bindings=False,
vector=False,
servo_restyle_damage="repaint",
affects=None,
):
Property.__init__(
self,
name=name,
spec=spec,
servo_pref=servo_pref,
gecko_pref=gecko_pref,
enabled_in=enabled_in,
rule_types_allowed=rule_types_allowed,
aliases=aliases,
extra_prefixes=extra_prefixes,
flags=flags,
)
self.affects = affects
self.flags += self.affects_flags()
self.keyword = keyword
self.predefined_type = predefined_type
self.style_struct = style_struct
self.has_effect_on_gecko_scrollbars = has_effect_on_gecko_scrollbars
assert (
has_effect_on_gecko_scrollbars in [None, False, True]
and not style_struct.inherited
or (gecko_pref is None and enabled_in != "")
== (has_effect_on_gecko_scrollbars is None)
), (
"Property "
+ name
+ ": has_effect_on_gecko_scrollbars must be "
+ "specified, and must have a value of True or False, iff a "
+ "property is inherited and is behind a Gecko pref or internal"
)
self.need_index = need_index
self.gecko_ffi_name = gecko_ffi_name or "m" + self.camel_case
self.cast_type = cast_type
self.logical = arg_to_bool(logical)
self.logical_group = logical_group
if self.logical:
assert logical_group, "Property " + name + " must have a logical group"
self.boxed = arg_to_bool(boxed)
self.allow_quirks = allow_quirks
self.ignored_when_colors_disabled = ignored_when_colors_disabled
self.is_vector = vector
self.simple_vector_bindings = simple_vector_bindings
# This is done like this since just a plain bool argument seemed like
# really random.
if animation_value_type is None:
raise TypeError(
"animation_value_type should be specified for (" + name + ")"
)
self.animation_value_type = animation_value_type
self.animatable = animation_value_type != "none"
self.is_animatable_with_computed_value = (
animation_value_type == "ComputedValue"
or animation_value_type == "discrete"
)
# See compute_damage for the various values this can take
self.servo_restyle_damage = servo_restyle_damage
def affects_flags(self):
# Layout is the stronger hint. This property animation affects layout
# or frame construction. `display` or `width` are examples that should
# use this.
if self.affects == "layout":
return ["AFFECTS_LAYOUT"]
# This property doesn't affect layout, but affects overflow.
# `transform` and co. are examples of this.
if self.affects == "overflow":
return ["AFFECTS_OVERFLOW"]
# This property affects the rendered output but doesn't affect layout.
# `opacity`, `color`, or `z-index` are examples of this.
if self.affects == "paint":
return ["AFFECTS_PAINT"]
# This property doesn't affect rendering in any way.
# `user-select` is an example of this.
assert self.affects == "", (
"Property "
+ self.name
+ ': affects must be specified and be one of ["layout", "overflow", "paint", ""], see Longhand.affects_flags for documentation'
)
return []
@staticmethod
def type():
return "longhand"
# For a given logical property, return the kind of mapping we need to
# perform, and which logical value we represent, in a tuple.
def logical_mapping_data(self, data):
if not self.logical:
return []
# Sizes and axes are basically the same for mapping, we just need
# slightly different replacements (block-size -> height, etc rather
# than -x/-y) below.
for [ty, logical_items, physical_items] in [
["Side", LOGICAL_SIDES, PHYSICAL_SIDES],
["Corner", LOGICAL_CORNERS, PHYSICAL_CORNERS],
["Axis", LOGICAL_SIZES, PHYSICAL_SIZES],
["Axis", LOGICAL_AXES, PHYSICAL_AXES],
]:
candidate = [s for s in logical_items if s in self.name]
if candidate:
assert len(candidate) == 1
return [ty, candidate[0], logical_items, physical_items]
assert False, "Don't know how to deal with " + self.name
def logical_mapping_kind(self, data):
assert self.logical
[kind, item, _, _] = self.logical_mapping_data(data)
return "LogicalMappingKind::{}(Logical{}::{})".format(
kind, kind, to_camel_case(item.replace("-size", ""))
)
# For a given logical property return all the physical property names
# corresponding to it.
def all_physical_mapped_properties(self, data):
if not self.logical:
return []
[_, logical_side, _, physical_items] = self.logical_mapping_data(data)
return [
data.longhands_by_name[to_phys(self.name, logical_side, physical_side)]
for physical_side in physical_items
]
def may_be_disabled_in(self, shorthand, engine):
if engine == "gecko":
return self.gecko_pref and self.gecko_pref != shorthand.gecko_pref
elif engine == "servo":
return self.servo_pref and self.servo_pref != shorthand.servo_pref
else:
raise Exception("Bad engine: " + engine)
def base_type(self):
if self.predefined_type and not self.is_vector:
return "crate::values::specified::{}".format(self.predefined_type)
return "longhands::{}::SpecifiedValue".format(self.ident)
def specified_type(self):
if self.predefined_type and not self.is_vector:
ty = "crate::values::specified::{}".format(self.predefined_type)
else:
ty = "longhands::{}::SpecifiedValue".format(self.ident)
if self.boxed:
ty = "Box<{}>".format(ty)
return ty
def specified_is_copy(self):
if self.is_vector or self.boxed:
return False
if self.predefined_type:
return self.predefined_type in {
"AlignContent",
"AlignItems",
"AlignSelf",
"Appearance",
"AnimationComposition",
"AnimationDirection",
"AnimationFillMode",
"AnimationPlayState",
"AspectRatio",
"BaselineSource",
"BreakBetween",
"BreakWithin",
"BackgroundRepeat",
"BorderImageRepeat",
"BorderStyle",
"table::CaptionSide",
"Clear",
"ColumnCount",
"Contain",
"ContentVisibility",
"ContainerType",
"Display",
"FillRule",
"Float",
"FontLanguageOverride",
"FontSizeAdjust",
"FontStretch",
"FontStyle",
"FontSynthesis",
"FontVariantEastAsian",
"FontVariantLigatures",
"FontVariantNumeric",
"FontWeight",
"GreaterThanOrEqualToOneNumber",
"GridAutoFlow",
"ImageRendering",
"InitialLetter",
"Integer",
"JustifyContent",
"JustifyItems",
"JustifySelf",
"LineBreak",
"LineClamp",
"MasonryAutoFlow",
"ui::MozTheme",
"BoolInteger",
"text::MozControlCharacterVisibility",
"MathDepth",
"MozScriptMinSize",
"MozScriptSizeMultiplier",
"TransformBox",
"TextDecorationSkipInk",
"NonNegativeNumber",
"OffsetRotate",
"Opacity",
"OutlineStyle",
"Overflow",
"OverflowAnchor",
"OverflowClipBox",
"OverflowWrap",
"OverscrollBehavior",
"PageOrientation",
"Percentage",
"PrintColorAdjust",
"ForcedColorAdjust",
"Resize",
"RubyPosition",
"SVGOpacity",
"SVGPaintOrder",
"ScrollbarGutter",
"ScrollSnapAlign",
"ScrollSnapAxis",
"ScrollSnapStop",
"ScrollSnapStrictness",
"ScrollSnapType",
"TextAlign",
"TextAlignLast",
"TextDecorationLine",
"TextEmphasisPosition",
"TextJustify",
"TextTransform",
"TextUnderlinePosition",
"TouchAction",
"TransformStyle",
"UserSelect",
"WordBreak",
"XSpan",
"XTextScale",
"ZIndex",
"Zoom",
}
if self.name == "overflow-y":
return True
return bool(self.keyword)
def animated_type(self):
assert self.animatable
computed = "<{} as ToComputedValue>::ComputedValue".format(self.base_type())
if self.is_animatable_with_computed_value:
return computed
return "<{} as ToAnimatedValue>::AnimatedValue".format(computed)
class Shorthand(Property):
def __init__(
self,
name,
sub_properties,
spec=None,
servo_pref=None,
gecko_pref=None,
enabled_in="content",
rule_types_allowed=DEFAULT_RULES,
aliases=None,
extra_prefixes=None,
flags=None,
):
Property.__init__(
self,
name=name,
spec=spec,
servo_pref=servo_pref,
gecko_pref=gecko_pref,
enabled_in=enabled_in,
rule_types_allowed=rule_types_allowed,
aliases=aliases,
extra_prefixes=extra_prefixes,
flags=flags,
)
self.sub_properties = sub_properties
def get_animatable(self):
for sub in self.sub_properties:
if sub.animatable:
return True
return False
animatable = property(get_animatable)
@staticmethod
def type():
return "shorthand"
class Alias(object):
def __init__(self, name, original, gecko_pref):
self.name = name
self.ident = to_rust_ident(name)
self.camel_case = to_camel_case(self.ident)
self.original = original
self.enabled_in = original.enabled_in
self.animatable = original.animatable
self.servo_pref = original.servo_pref
self.gecko_pref = gecko_pref
self.rule_types_allowed = original.rule_types_allowed
self.flags = original.flags
@staticmethod
def type():
return "alias"
def rule_types_allowed_names(self):
for name in RULE_VALUES:
if self.rule_types_allowed & RULE_VALUES[name] != 0:
yield name
def experimental(self, engine):
if engine == "gecko":
return bool(self.gecko_pref)
elif engine == "servo":
return bool(self.servo_pref)
else:
raise Exception("Bad engine: " + engine)
def explicitly_enabled_in_ua_sheets(self):
return self.enabled_in in ["ua", "chrome"]
def explicitly_enabled_in_chrome(self):
return self.enabled_in == "chrome"
def enabled_in_content(self):
return self.enabled_in == "content"
def nscsspropertyid(self):
return "nsCSSPropertyID::eCSSPropertyAlias_%s" % self.ident
class Method(object):
def __init__(self, name, return_type=None, arg_types=None, is_mut=False):
self.name = name
self.return_type = return_type
self.arg_types = arg_types or []
self.is_mut = is_mut
def arg_list(self):
args = ["_: " + x for x in self.arg_types]
args = ["&mut self" if self.is_mut else "&self"] + args
return ", ".join(args)
def signature(self):
sig = "fn %s(%s)" % (self.name, self.arg_list())
if self.return_type:
sig = sig + " -> " + self.return_type
return sig
def declare(self):
return self.signature() + ";"
def stub(self):
return self.signature() + "{ unimplemented!() }"
class StyleStruct(object):
def __init__(self, name, inherited, gecko_name=None):
self.gecko_struct_name = "Gecko" + name
self.name = name
self.name_lower = to_snake_case(name)
self.ident = to_rust_ident(self.name_lower)
self.longhands = []
self.inherited = inherited
self.gecko_name = gecko_name or name
self.gecko_ffi_name = "nsStyle" + self.gecko_name
self.document_dependent = self.gecko_name in ["Font", "Visibility", "Text"]
class PropertiesData(object):
def __init__(self, engine):
self.engine = engine
self.longhands = []
self.longhands_by_name = {}
self.longhands_by_logical_group = {}
self.longhand_aliases = []
self.shorthands = []
self.shorthands_by_name = {}
self.shorthand_aliases = []
self.counted_unknown_properties = [
CountedUnknownProperty(p) for p in COUNTED_UNKNOWN_PROPERTIES
]
self.style_structs = [
StyleStruct("Background", inherited=False),
StyleStruct("Border", inherited=False),
StyleStruct("Box", inherited=False, gecko_name="Display"),
StyleStruct("Column", inherited=False),
StyleStruct("Counters", inherited=False, gecko_name="Content"),
StyleStruct("Effects", inherited=False),
StyleStruct("Font", inherited=True),
StyleStruct("InheritedBox", inherited=True, gecko_name="Visibility"),
StyleStruct("InheritedSVG", inherited=True, gecko_name="SVG"),
StyleStruct("InheritedTable", inherited=True, gecko_name="TableBorder"),
StyleStruct("InheritedText", inherited=True, gecko_name="Text"),
StyleStruct("InheritedUI", inherited=True, gecko_name="UI"),
StyleStruct("List", inherited=True),
StyleStruct("Margin", inherited=False),
StyleStruct("Outline", inherited=False),
StyleStruct("Padding", inherited=False),
StyleStruct("Page", inherited=False),
StyleStruct("Position", inherited=False),
StyleStruct("SVG", inherited=False, gecko_name="SVGReset"),
StyleStruct("Table", inherited=False),
StyleStruct("Text", inherited=False, gecko_name="TextReset"),
StyleStruct("UI", inherited=False, gecko_name="UIReset"),
StyleStruct("XUL", inherited=False),
]
self.current_style_struct = None
def active_style_structs(self):
return [s for s in self.style_structs if s.longhands]
def add_prefixed_aliases(self, property):
# FIXME Servo's DOM architecture doesn't support vendor-prefixed properties.
# See servo/servo#14941.
if self.engine == "gecko":
for prefix, pref in property.extra_prefixes:
property.aliases.append(("-%s-%s" % (prefix, property.name), pref))
def declare_longhand(self, name, engines=None, **kwargs):
engines = engines.split()
if self.engine not in engines:
return
longhand = Longhand(self.current_style_struct, name, **kwargs)
self.add_prefixed_aliases(longhand)
longhand.aliases = [Alias(xp[0], longhand, xp[1]) for xp in longhand.aliases]
self.longhand_aliases += longhand.aliases
self.current_style_struct.longhands.append(longhand)
self.longhands.append(longhand)
self.longhands_by_name[name] = longhand
if longhand.logical_group:
self.longhands_by_logical_group.setdefault(
longhand.logical_group, []
).append(longhand)
return longhand
def declare_shorthand(self, name, sub_properties, engines, *args, **kwargs):
engines = engines.split()
if self.engine not in engines:
return
sub_properties = [self.longhands_by_name[s] for s in sub_properties]
shorthand = Shorthand(name, sub_properties, *args, **kwargs)
self.add_prefixed_aliases(shorthand)
shorthand.aliases = [Alias(xp[0], shorthand, xp[1]) for xp in shorthand.aliases]
self.shorthand_aliases += shorthand.aliases
self.shorthands.append(shorthand)
self.shorthands_by_name[name] = shorthand
return shorthand
def shorthands_except_all(self):
return [s for s in self.shorthands if s.name != "all"]
def all_aliases(self):
return self.longhand_aliases + self.shorthand_aliases
def _add_logical_props(data, props):
groups = set()
for prop in props:
if prop not in data.longhands_by_name:
assert data.engine == "servo"
continue
prop = data.longhands_by_name[prop]
if prop.logical_group:
groups.add(prop.logical_group)
for group in groups:
for prop in data.longhands_by_logical_group[group]:
props.add(prop.name)
# These are probably Gecko bugs and should be supported per spec.
def _remove_common_first_line_and_first_letter_properties(props, engine):
if engine == "gecko":
props.remove("tab-size")
props.remove("hyphens")
props.remove("line-break")
props.remove("text-align-last")
props.remove("text-emphasis-position")
props.remove("text-emphasis-style")
props.remove("text-emphasis-color")
props.remove("overflow-wrap")
props.remove("text-align")
props.remove("text-justify")
props.remove("white-space-collapse")
props.remove("text-wrap-mode")
props.remove("text-wrap-style")
props.remove("word-break")
props.remove("text-indent")
class PropertyRestrictions:
@staticmethod
def logical_group(data, group):
return [p.name for p in data.longhands_by_logical_group[group]]
@staticmethod
def shorthand(data, shorthand):
if shorthand not in data.shorthands_by_name:
return []
return [p.name for p in data.shorthands_by_name[shorthand].sub_properties]
@staticmethod
def spec(data, spec_path):
return [p.name for p in data.longhands if spec_path in p.spec]
@staticmethod
def svg_text_properties():
props = set(
[
"fill",
"fill-opacity",
"fill-rule",
"paint-order",
"stroke",
"stroke-dasharray",
"stroke-dashoffset",
"stroke-linecap",
"stroke-linejoin",
"stroke-miterlimit",
"stroke-opacity",
"stroke-width",
"text-rendering",
"vector-effect",
]
)
return props
@staticmethod
def webkit_text_properties():
props = set(
[
# Kinda like css-text?
"-webkit-text-stroke-width",
"-webkit-text-fill-color",
"-webkit-text-stroke-color",
]
)
return props
@staticmethod
def first_letter(data):
props = set(
[
"color",
"opacity",
"float",
"initial-letter",
# Kinda like css-fonts?
"-moz-osx-font-smoothing",
"vertical-align",
"baseline-source",
"line-height",
# Kinda like css-backgrounds?
"background-blend-mode",
]
+ PropertyRestrictions.shorthand(data, "padding")
+ PropertyRestrictions.shorthand(data, "margin")
+ PropertyRestrictions.spec(data, "css-fonts")
+ PropertyRestrictions.spec(data, "css-backgrounds")
+ PropertyRestrictions.spec(data, "css-text")
+ PropertyRestrictions.spec(data, "css-shapes")
+ PropertyRestrictions.spec(data, "css-text-decor")
)
props = props.union(PropertyRestrictions.svg_text_properties())
props = props.union(PropertyRestrictions.webkit_text_properties())
_add_logical_props(data, props)
_remove_common_first_line_and_first_letter_properties(props, data.engine)
return props
@staticmethod
def first_line(data):
props = set(
[
# Per spec.
"color",
"opacity",
# Kinda like css-fonts?
"-moz-osx-font-smoothing",
"vertical-align",
"baseline-source",
"line-height",
# Kinda like css-backgrounds?
"background-blend-mode",
]
+ PropertyRestrictions.spec(data, "css-fonts")
+ PropertyRestrictions.spec(data, "css-backgrounds")
+ PropertyRestrictions.spec(data, "css-text")
+ PropertyRestrictions.spec(data, "css-text-decor")
)
props = props.union(PropertyRestrictions.svg_text_properties())
props = props.union(PropertyRestrictions.webkit_text_properties())
# These are probably Gecko bugs and should be supported per spec.
for prop in PropertyRestrictions.shorthand(data, "border"):
props.remove(prop)
for prop in PropertyRestrictions.shorthand(data, "border-radius"):
props.remove(prop)
props.remove("box-shadow")
_remove_common_first_line_and_first_letter_properties(props, data.engine)
return props
#
# The spec says that placeholder and first-line have the same restrictions,
# but that's not true in Gecko and we also allow a handful other properties
# for ::placeholder.
@staticmethod
def placeholder(data):
props = PropertyRestrictions.first_line(data)
props.add("opacity")
props.add("text-overflow")
props.add("text-align")
props.add("text-justify")
for p in PropertyRestrictions.shorthand(data, "text-wrap"):
props.add(p)
for p in PropertyRestrictions.shorthand(data, "white-space"):
props.add(p)
# ::placeholder can't be SVG text
props -= PropertyRestrictions.svg_text_properties()
return props
@staticmethod
def marker(data):
return set(
[
"color",
"text-combine-upright",
"text-transform",
"unicode-bidi",
"direction",
"content",
"line-height",
"-moz-osx-font-smoothing",
]
+ PropertyRestrictions.shorthand(data, "text-wrap")
+ PropertyRestrictions.shorthand(data, "white-space")
+ PropertyRestrictions.spec(data, "css-fonts")
+ PropertyRestrictions.spec(data, "css-animations")
+ PropertyRestrictions.spec(data, "css-transitions")
)
@staticmethod
def cue(data):
return set(
[
"color",
"opacity",
"visibility",
"text-shadow",
"text-combine-upright",
"ruby-position",
# XXX Should these really apply to cue?
"-moz-osx-font-smoothing",
# FIXME(emilio): background-blend-mode should be part of the
# background shorthand, and get reset, per
"background-blend-mode",
]
+ PropertyRestrictions.shorthand(data, "text-decoration")
+ PropertyRestrictions.shorthand(data, "text-wrap")
+ PropertyRestrictions.shorthand(data, "white-space")
+ PropertyRestrictions.shorthand(data, "background")
+ PropertyRestrictions.shorthand(data, "outline")
+ PropertyRestrictions.shorthand(data, "font")
+ PropertyRestrictions.shorthand(data, "font-synthesis")
)
class CountedUnknownProperty:
def __init__(self, name):
self.name = name
self.ident = to_rust_ident(name)
self.camel_case = to_camel_case(self.ident)