1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
# 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
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import re
def to_rust_ident(name):
name = name.replace("-", "_")
if name in ["static", "super", "box", "move"]: # Rust keywords
name += "_"
return name
def to_camel_case(ident):
return re.sub("(^|_|-)([a-z])", lambda m: m.group(2).upper(), ident.strip("_").strip("-"))
class Keyword(object):
def __init__(self, name, values, gecko_constant_prefix=None,
gecko_enum_prefix=None,
extra_gecko_values=None, extra_servo_values=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()
def gecko_values(self):
return self.values + self.extra_gecko_values
def servo_values(self):
return self.values + self.extra_servo_values
def values_for(self, product):
if product == "gecko":
return self.gecko_values()
elif product == "servo":
return self.servo_values()
else:
raise Exception("Bad product: " + product)
def gecko_constant(self, value):
if self.gecko_enum_prefix:
parts = value.replace("-moz-", "").split("-")
parts = [p.title() for p in parts]
return self.gecko_enum_prefix + "::" + "".join(parts)
else:
return self.gecko_constant_prefix + "_" + value.replace("-moz-", "").replace("-", "_").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 ""
class Longhand(object):
def __init__(self, style_struct, name, animatable=None, derived_from=None, keyword=None,
predefined_type=None, custom_cascade=False, experimental=False, internal=False,
need_clone=False, need_index=False, gecko_ffi_name=None, depend_on_viewport_size=False,
allowed_in_keyframe_block=True):
self.name = name
self.keyword = keyword
self.predefined_type = predefined_type
self.ident = to_rust_ident(name)
self.camel_case = to_camel_case(self.ident)
self.style_struct = style_struct
self.experimental = ("layout.%s.enabled" % name) if experimental else None
self.custom_cascade = custom_cascade
self.internal = internal
self.need_index = need_index
self.gecko_ffi_name = gecko_ffi_name or "m" + self.camel_case
self.depend_on_viewport_size = depend_on_viewport_size
self.derived_from = (derived_from or "").split()
# https://drafts.csswg.org/css-animations/#keyframes
# > The <declaration-list> inside of <keyframe-block> accepts any CSS property
# > except those defined in this specification,
# > but does accept the `animation-play-state` property and interprets it specially.
self.allowed_in_keyframe_block = allowed_in_keyframe_block \
and allowed_in_keyframe_block != "False"
# This is done like this since just a plain bool argument seemed like
# really random.
if animatable is None:
raise TypeError("animatable should be specified for " + name + ")")
if isinstance(animatable, bool):
self.animatable = animatable
else:
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,
allowed_in_keyframe_block=True):
self.name = name
self.ident = to_rust_ident(name)
self.camel_case = to_camel_case(self.ident)
self.derived_from = None
self.experimental = ("layout.%s.enabled" % name) if experimental else None
self.sub_properties = sub_properties
self.internal = internal
# https://drafts.csswg.org/css-animations/#keyframes
# > The <declaration-list> inside of <keyframe-block> accepts any CSS property
# > except those defined in this specification,
# > but does accept the `animation-play-state` property and interprets it specially.
self.allowed_in_keyframe_block = allowed_in_keyframe_block \
and allowed_in_keyframe_block != "False"
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, additional_methods=None):
self.gecko_struct_name = "Gecko" + name
self.name = name
self.name_lower = name.lower()
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.additional_methods = additional_methods or []
class PropertiesData(object):
def __init__(self, product):
self.product = product
self.style_structs = []
self.current_style_struct = None
self.longhands = []
self.longhands_by_name = {}
self.derived_longhands = {}
self.shorthands = []
def new_style_struct(self, *args, **kwargs):
style_struct = StyleStruct(*args, **kwargs)
self.style_structs.append(style_struct)
self.current_style_struct = style_struct
def active_style_structs(self):
return [s for s in self.style_structs if s.additional_methods or s.longhands]
def declare_longhand(self, name, products="gecko servo", **kwargs):
products = products.split()
if self.product not in products:
return
longhand = Longhand(self.current_style_struct, name, **kwargs)
self.current_style_struct.longhands.append(longhand)
self.longhands.append(longhand)
self.longhands_by_name[name] = longhand
for name in longhand.derived_from:
self.derived_longhands.setdefault(name, []).append(longhand)
return longhand
def declare_shorthand(self, name, sub_properties, products="gecko servo", *args, **kwargs):
products = products.split()
if self.product not in products:
return
sub_properties = [self.longhands_by_name[s] for s in sub_properties]
shorthand = Shorthand(name, sub_properties, *args, **kwargs)
self.shorthands.append(shorthand)
return shorthand
|
