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