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1 #!/usr/bin/env python | |
2 | |
3 import os.path | |
4 import re | |
5 import subprocess | |
6 import sys | |
7 | |
8 from in_file import InFile | |
9 import in_generator | |
10 import license | |
11 | |
12 | |
13 HEADER_TEMPLATE = """ | |
14 %(license)s | |
15 | |
16 #ifndef %(class_name)s_h | |
17 #define %(class_name)s_h | |
18 | |
19 #include "core/css/CSSParserMode.h" | |
20 #include "wtf/HashFunctions.h" | |
21 #include "wtf/HashTraits.h" | |
22 #include <string.h> | |
23 | |
24 namespace WTF { | |
25 class AtomicString; | |
26 class String; | |
27 } | |
28 | |
29 namespace WebCore { | |
30 | |
31 enum CSSPropertyID { | |
32 CSSPropertyInvalid = 0, | |
33 CSSPropertyVariable = 1, | |
34 %(property_enums)s | |
35 }; | |
36 | |
37 const int firstCSSProperty = %(first_property_id)s; | |
38 const int numCSSProperties = %(properties_count)s; | |
39 const int lastCSSProperty = %(last_property_id)d; | |
40 const size_t maxCSSPropertyNameLength = %(max_name_length)d; | |
41 | |
42 const char* getPropertyName(CSSPropertyID); | |
43 const WTF::AtomicString& getPropertyNameAtomicString(CSSPropertyID); | |
44 WTF::String getPropertyNameString(CSSPropertyID); | |
45 WTF::String getJSPropertyName(CSSPropertyID); | |
46 bool isInternalProperty(CSSPropertyID id); | |
47 | |
48 inline CSSPropertyID convertToCSSPropertyID(int value) | |
49 { | |
50 ASSERT((value >= firstCSSProperty && value <= lastCSSProperty) || value == C
SSPropertyInvalid); | |
51 return static_cast<CSSPropertyID>(value); | |
52 } | |
53 | |
54 } // namespace WebCore | |
55 | |
56 namespace WTF { | |
57 template<> struct DefaultHash<WebCore::CSSPropertyID> { typedef IntHash<unsigned
> Hash; }; | |
58 template<> struct HashTraits<WebCore::CSSPropertyID> : GenericHashTraits<WebCore
::CSSPropertyID> { | |
59 static const bool emptyValueIsZero = true; | |
60 static const bool needsDestruction = false; | |
61 static void constructDeletedValue(WebCore::CSSPropertyID& slot) { slot = sta
tic_cast<WebCore::CSSPropertyID>(WebCore::lastCSSProperty + 1); } | |
62 static bool isDeletedValue(WebCore::CSSPropertyID value) { return value == (
WebCore::lastCSSProperty + 1); } | |
63 }; | |
64 } | |
65 | |
66 #endif // %(class_name)s_h | |
67 """ | |
68 | |
69 GPERF_TEMPLATE = """ | |
70 %%{ | |
71 %(license)s | |
72 | |
73 #include "config.h" | |
74 #include "%(class_name)s.h" | |
75 #include "core/platform/HashTools.h" | |
76 #include <string.h> | |
77 | |
78 #include "wtf/ASCIICType.h" | |
79 #include "wtf/text/AtomicString.h" | |
80 #include "wtf/text/WTFString.h" | |
81 | |
82 namespace WebCore { | |
83 static const char propertyNameStringsPool[] = { | |
84 %(property_name_strings)s | |
85 }; | |
86 | |
87 static const unsigned short propertyNameStringsOffsets[] = { | |
88 %(property_name_offsets)s | |
89 }; | |
90 | |
91 %%} | |
92 %%struct-type | |
93 struct Property; | |
94 %%omit-struct-type | |
95 %%language=C++ | |
96 %%readonly-tables | |
97 %%global-table | |
98 %%compare-strncmp | |
99 %%define class-name %(class_name)sHash | |
100 %%define lookup-function-name findPropertyImpl | |
101 %%define hash-function-name propery_hash_function | |
102 %%define slot-name nameOffset | |
103 %%define word-array-name property_wordlist | |
104 %%enum | |
105 %%%% | |
106 %(property_to_enum_map)s | |
107 %%%% | |
108 const Property* findProperty(register const char* str, register unsigned int len
) | |
109 { | |
110 return %(class_name)sHash::findPropertyImpl(str, len); | |
111 } | |
112 | |
113 const char* getPropertyName(CSSPropertyID id) | |
114 { | |
115 if (id < firstCSSProperty) | |
116 return 0; | |
117 int index = id - firstCSSProperty; | |
118 if (index >= numCSSProperties) | |
119 return 0; | |
120 return propertyNameStringsPool + propertyNameStringsOffsets[index]; | |
121 } | |
122 | |
123 const AtomicString& getPropertyNameAtomicString(CSSPropertyID id) | |
124 { | |
125 if (id < firstCSSProperty) | |
126 return nullAtom; | |
127 int index = id - firstCSSProperty; | |
128 if (index >= numCSSProperties) | |
129 return nullAtom; | |
130 | |
131 static AtomicString* propertyStrings = new AtomicString[numCSSProperties]; /
/ Intentionally never destroyed. | |
132 AtomicString& propertyString = propertyStrings[index]; | |
133 if (propertyString.isNull()) { | |
134 const char* propertyName = propertyNameStringsPool + propertyNameStrings
Offsets[index]; | |
135 propertyString = AtomicString(propertyName, strlen(propertyName), Atomic
String::ConstructFromLiteral); | |
136 } | |
137 return propertyString; | |
138 } | |
139 | |
140 String getPropertyNameString(CSSPropertyID id) | |
141 { | |
142 // We share the StringImpl with the AtomicStrings. | |
143 return getPropertyNameAtomicString(id).string(); | |
144 } | |
145 | |
146 String getJSPropertyName(CSSPropertyID id) | |
147 { | |
148 char result[maxCSSPropertyNameLength + 1]; | |
149 const char* cssPropertyName = getPropertyName(id); | |
150 const char* propertyNamePointer = cssPropertyName; | |
151 if (!propertyNamePointer) | |
152 return emptyString(); | |
153 | |
154 char* resultPointer = result; | |
155 while (char character = *propertyNamePointer++) { | |
156 if (character == '-') { | |
157 char nextCharacter = *propertyNamePointer++; | |
158 if (!nextCharacter) | |
159 break; | |
160 character = (propertyNamePointer - 2 != cssPropertyName) ? toASCIIUp
per(nextCharacter) : nextCharacter; | |
161 } | |
162 *resultPointer++ = character; | |
163 } | |
164 *resultPointer = '\\0'; | |
165 return String(result); | |
166 } | |
167 | |
168 bool isInternalProperty(CSSPropertyID id) | |
169 { | |
170 switch (id) { | |
171 %(internal_properties)s | |
172 return true; | |
173 default: | |
174 return false; | |
175 } | |
176 } | |
177 | |
178 } // namespace WebCore | |
179 """ | |
180 | |
181 | |
182 class CSSPropertiesWriter(in_generator.Writer): | |
183 class_name = "CSSPropertyNames" | |
184 defaults = { | |
185 'alias_for': None, | |
186 'condition': None, | |
187 'is_internal': False, | |
188 } | |
189 | |
190 def __init__(self, file_paths, enabled_conditions): | |
191 in_generator.Writer.__init__(self, file_paths, enabled_conditions) | |
192 self._outputs = {(self.class_name + ".h"): self.generate_header, | |
193 (self.class_name + ".cpp"): self.generate_implementatio
n, | |
194 } | |
195 | |
196 all_properties = self.in_file.name_dictionaries | |
197 self._aliases = filter(lambda property: property['alias_for'], all_prope
rties) | |
198 for offset, property in enumerate(self._aliases): | |
199 # Aliases use the enum_name that they are an alias for. | |
200 property['enum_name'] = self._enum_name_from_property_name(property[
'alias_for']) | |
201 # Aliases do not get an enum_value. | |
202 | |
203 self._properties = filter(lambda property: not property['alias_for'] and
not property['condition'] or property['condition'] in self._enabled_conditions,
all_properties) | |
204 if len(self._properties) > 1024: | |
205 print "ERROR : There is more than 1024 CSS Properties, you need to u
pdate CSSProperty.h/StylePropertyMetadata m_propertyID accordingly." | |
206 exit(1) | |
207 self._first_property_id = 2 # We start after CSSPropertyInvalid and CSS
PropertyVariable. | |
208 property_id = self._first_property_id | |
209 for offset, property in enumerate(self._properties): | |
210 property['enum_name'] = self._enum_name_from_property_name(property[
'name']) | |
211 property['enum_value'] = self._first_property_id + offset | |
212 if property['name'].startswith('-internal-'): | |
213 property['is_internal'] = True | |
214 | |
215 def _enum_name_from_property_name(self, property_name): | |
216 return "CSSProperty" + re.sub(r'(^[^-])|-(.)', lambda match: (match.grou
p(1) or match.group(2)).upper(), property_name) | |
217 | |
218 def _enum_declaration(self, property): | |
219 return " %(enum_name)s = %(enum_value)s," % property | |
220 | |
221 def generate_header(self): | |
222 return HEADER_TEMPLATE % { | |
223 'license': license.license_for_generated_cpp(), | |
224 'class_name': self.class_name, | |
225 'property_enums': "\n".join(map(self._enum_declaration, self._proper
ties)), | |
226 'first_property_id': self._first_property_id, | |
227 'properties_count': len(self._properties), | |
228 'last_property_id': self._first_property_id + len(self._properties)
- 1, | |
229 'max_name_length': reduce(max, map(len, map(lambda property: propert
y['name'], self._properties))), | |
230 } | |
231 | |
232 def _case_properties(self, property): | |
233 return "case %(enum_name)s:" % property | |
234 | |
235 def generate_implementation(self): | |
236 property_offsets = [] | |
237 current_offset = 0 | |
238 for property in self._properties: | |
239 property_offsets.append(current_offset) | |
240 current_offset += len(property["name"]) + 1 | |
241 | |
242 gperf_input = GPERF_TEMPLATE % { | |
243 'license': license.license_for_generated_cpp(), | |
244 'class_name': self.class_name, | |
245 'property_name_strings': '\n'.join(map(lambda property: ' "%(name
)s\\0"' % property, self._properties)), | |
246 'property_name_offsets': '\n'.join(map(lambda offset: ' %d,' % of
fset, property_offsets)), | |
247 'property_to_enum_map': '\n'.join(map(lambda property: '%(name)s, %(
enum_name)s' % property, self._properties + self._aliases)), | |
248 'internal_properties': '\n'.join(map(self._case_properties, filter(l
ambda property: property['is_internal'], self._properties))), | |
249 } | |
250 # FIXME: If we could depend on Python 2.7, we would use subprocess.check
_output | |
251 gperf_args = ['gperf', '--key-positions=*', '-P', '-D', '-n', '-s', '2'] | |
252 gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subpr
ocess.PIPE) | |
253 return gperf.communicate(gperf_input)[0] | |
254 | |
255 | |
256 if __name__ == "__main__": | |
257 in_generator.Maker(CSSPropertiesWriter).main(sys.argv) | |
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