This repository has been archived by the owner on Aug 27, 2019. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 35
/
rules.py
280 lines (247 loc) · 10.2 KB
/
rules.py
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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
# CSSPrefixer
# Copyright 2010 MyFreeWeb <me@myfreeweb.ru>
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
import cssutils
prefixRegex = re.compile('^(-o-|-ms-|-moz-|-webkit-)')
class BaseReplacementRule(object):
vendor_prefixes = ['webkit', 'moz']
def __init__(self, prop):
self.prop = prop
def get_prefixed_props(self):
for prefix in self.vendor_prefixes:
yield cssutils.css.Property(
name='-%s-%s' % (prefix, self.prop.name),
value=self.prop.value,
priority=self.prop.priority
)
@staticmethod
def should_prefix():
return True
class FullReplacementRule(BaseReplacementRule):
"""
IE9 implements CSS3 without vendor prefixes,
so this is base + Opera.
"""
vendor_prefixes = BaseReplacementRule.vendor_prefixes + ['o']
class WebkitReplacementRule(BaseReplacementRule):
vendor_prefixes = ['webkit']
class OperaAndIEReplacementRule(BaseReplacementRule):
vendor_prefixes = ['o', 'ms']
class BorderRadiusReplacementRule(BaseReplacementRule):
"""
Mozilla's Gecko engine uses different syntax for rounded corners.
"""
vendor_prefixes = ['webkit']
def get_prefixed_props(self):
for prop in BaseReplacementRule.get_prefixed_props(self):
yield prop
name = '-moz-' + self.prop.name.replace('top-left-radius', 'radius-topleft') \
.replace('top-right-radius', 'radius-topright') \
.replace('bottom-right-radius', 'radius-bottomright') \
.replace('bottom-left-radius', 'radius-bottomleft')
yield cssutils.css.Property(
name=name,
value=self.prop.value,
priority=self.prop.priority
)
class DisplayReplacementRule(BaseReplacementRule):
"""
Flexible Box Model stuff.
CSSUtils parser doesn't support duplicate properties, so that's dirty.
"""
def get_prefixed_props(self):
if self.prop.value == 'box':#only add prefixes if the value is box
for prefix in self.vendor_prefixes:
yield cssutils.css.Property(
name='display',
value='-%s-box' % prefix,
priority=self.prop.priority
)
class TransitionReplacementRule(BaseReplacementRule):
vendor_prefixes = ['webkit', 'moz', 'o']
def __get_prefixed_prop(self, prefix=None):
name = self.prop.name
if prefix:
name = '-%s-%s' % (prefix, self.prop.name)
newValues = []
for value in self.prop.value.split(','):
parts = value.strip().split(' ')
parts[0] = prefixRegex.sub('', parts[0])
if parts[0] in rules and prefix and rules[parts[0]].should_prefix():
parts[0] = '-%s-%s' % (prefix, parts[0])
newValues.append(' '.join(parts))
return cssutils.css.Property(
name=name,
value=', '.join(newValues),
priority=self.prop.priority
)
def get_prefixed_props(self):
for prefix in self.vendor_prefixes:
yield self.__get_prefixed_prop(prefix)
def get_base_prop(self):
return self.__get_prefixed_prop()
class OpacityReplacementRule(BaseReplacementRule):
def get_prefixed_props(self):
ieValue = float(self.prop.value)*100
yield cssutils.css.Property(
name='-ms-filter',
value='"progid:DXImageTransform.Microsoft.Alpha(Opacity=%d)"' % ieValue,
priority=self.prop.priority
)
yield cssutils.css.Property(
name='filter',
value='alpha(opacity=%d)' % ieValue,
priority=self.prop.priority
)
@staticmethod
def should_prefix():
return False
class GradientReplacementRule(BaseReplacementRule):
vendor_prefixes = ['webkit', 'moz', 'o']
def __iter_values(self):
valueSplit = self.prop.value.split(',')
index = 0
currentString = ''
while(True):
if index >= len(valueSplit):
break
snip = prefixRegex.sub('', valueSplit[index].strip())
if snip.startswith('linear-gradient'):
values = [re.sub('^linear-gradient\(', '', snip)]
if valueSplit[index+1].strip().endswith(')'):
values.append(re.sub('\)+$', '', valueSplit[index+1].strip()))
else:
values.append(valueSplit[index+1].strip())
values.append(re.sub('\)+$', '', valueSplit[index+2].strip()))
if len(values) == 2:
yield {
'start': values[0],
'end': values[1]
}
else:
yield {
'pos': values[0],
'start': values[1],
'end': values[2]
}
index += len(values)
elif snip.startswith('gradient'):
yield {
'start': re.sub('\)+$', '', valueSplit[index+4].strip()),
'end': re.sub('\)+$', '', valueSplit[index+6].strip()),
}
index += 7
else:
#not a gradient so just yield the raw string
yield snip
index += 1
def __get_prefixed_prop(self, values, prefix=None):
gradientName = 'linear-gradient'
if prefix:
gradientName = '-%s-%s' % (prefix, gradientName)
newValues = []
for value in values:
if isinstance(value, dict):
if 'pos' in value:
newValues.append(gradientName+'(%(pos)s, %(start)s, %(end)s)' % value)
else:
newValues.append(gradientName+'(%(start)s, %(end)s)' % value)
else:
newValues.append(value)
return cssutils.css.Property(
name=self.prop.name,
value=', '.join(newValues),
priority=self.prop.priority
)
def get_prefixed_props(self):
values = list(self.__iter_values())
needPrefix = False
for value in values:#check if there are any gradients
if isinstance(value, dict):
needPrefix = True
break
if needPrefix:
for prefix in self.vendor_prefixes:
yield self.__get_prefixed_prop(values, prefix)
if prefix == 'webkit':
newValues = []
for value in values:
if isinstance(value, dict):
newValues.append('-webkit-gradient(linear, left top, left bottom, color-stop(0, %(start)s), color-stop(1, %(end)s))' % value)
else:
newValues.append(value)
yield cssutils.css.Property(
name=self.prop.name,
value=', '.join(newValues),
priority=self.prop.priority
)
#add an ie gradient if there is gradient data
for value in values:
if isinstance(value, dict):
yield cssutils.css.Property(
name='filter',
value='"progid:DXImageTransform.Microsoft.gradient(startColorStr=%(start)s, EndColorStr=%(end)s)"' % value,
priority=self.prop.priority
)
break
else:
yield None
def get_base_prop(self):
values = self.__iter_values()
return self.__get_prefixed_prop(values)
rules = {
'border-radius': BaseReplacementRule,
'border-top-left-radius': BorderRadiusReplacementRule,
'border-top-right-radius': BorderRadiusReplacementRule,
'border-bottom-right-radius': BorderRadiusReplacementRule,
'border-bottom-left-radius': BorderRadiusReplacementRule,
'border-image': FullReplacementRule,
'box-shadow': BaseReplacementRule,
'box-sizing': BaseReplacementRule,
'box-orient': BaseReplacementRule,
'box-direction': BaseReplacementRule,
'box-ordinal-group': BaseReplacementRule,
'box-align': BaseReplacementRule,
'box-flex': BaseReplacementRule,
'box-flex-group': BaseReplacementRule,
'box-pack': BaseReplacementRule,
'box-lines': BaseReplacementRule,
'user-select': BaseReplacementRule,
'user-modify': BaseReplacementRule,
'margin-start': BaseReplacementRule,
'margin-end': BaseReplacementRule,
'padding-start': BaseReplacementRule,
'padding-end': BaseReplacementRule,
'column-count': BaseReplacementRule,
'column-gap': BaseReplacementRule,
'column-rule': BaseReplacementRule,
'column-rule-color': BaseReplacementRule,
'column-rule-style': BaseReplacementRule,
'column-rule-width': BaseReplacementRule,
'column-width': BaseReplacementRule,
'background-clip': WebkitReplacementRule,
'background-origin': WebkitReplacementRule,
'background-size': WebkitReplacementRule,
'background-image': GradientReplacementRule,
'background': GradientReplacementRule,
'text-overflow': OperaAndIEReplacementRule,
'transition': TransitionReplacementRule,
'transition-delay': FullReplacementRule,
'transition-duration': FullReplacementRule,
'transition-property': TransitionReplacementRule,
'transition-timing-function': FullReplacementRule,
'transform': FullReplacementRule,
'transform-origin': FullReplacementRule,
'display': DisplayReplacementRule,
'opacity': OpacityReplacementRule,
'appearance': WebkitReplacementRule,
}