1 #!/usr/bin/env python 2 3 import subprocess 4 import sys 5 6 import css_properties 7 import in_generator 8 import license 9 10 11 HEADER_TEMPLATE = """ 12 %(license)s 13 14 #ifndef %(class_name)s_h 15 #define %(class_name)s_h 16 17 #include "core/css/parser/CSSParserMode.h" 18 #include "wtf/HashFunctions.h" 19 #include "wtf/HashTraits.h" 20 #include <string.h> 21 22 namespace WTF { 23 class AtomicString; 24 class String; 25 } 26 27 namespace blink { 28 29 enum CSSPropertyID { 30 CSSPropertyInvalid = 0, 31 %(property_enums)s 32 }; 33 34 const int firstCSSProperty = %(first_property_id)s; 35 const int numCSSProperties = %(properties_count)s; 36 const int lastCSSProperty = %(last_property_id)d; 37 const size_t maxCSSPropertyNameLength = %(max_name_length)d; 38 39 const char* getPropertyName(CSSPropertyID); 40 const WTF::AtomicString& getPropertyNameAtomicString(CSSPropertyID); 41 WTF::String getPropertyNameString(CSSPropertyID); 42 WTF::String getJSPropertyName(CSSPropertyID); 43 bool isInternalProperty(CSSPropertyID id); 44 45 inline CSSPropertyID convertToCSSPropertyID(int value) 46 { 47 ASSERT((value >= firstCSSProperty && value <= lastCSSProperty) || value == CSSPropertyInvalid); 48 return static_cast<CSSPropertyID>(value); 49 } 50 51 } // namespace blink 52 53 namespace WTF { 54 template<> struct DefaultHash<blink::CSSPropertyID> { typedef IntHash<unsigned> Hash; }; 55 template<> struct HashTraits<blink::CSSPropertyID> : GenericHashTraits<blink::CSSPropertyID> { 56 static const bool emptyValueIsZero = true; 57 static const bool needsDestruction = false; 58 static void constructDeletedValue(blink::CSSPropertyID& slot, bool) { slot = static_cast<blink::CSSPropertyID>(blink::lastCSSProperty + 1); } 59 static bool isDeletedValue(blink::CSSPropertyID value) { return value == (blink::lastCSSProperty + 1); } 60 }; 61 } 62 63 #endif // %(class_name)s_h 64 """ 65 66 GPERF_TEMPLATE = """ 67 %%{ 68 %(license)s 69 70 #include "config.h" 71 #include "%(class_name)s.h" 72 #include "core/css/HashTools.h" 73 #include <string.h> 74 75 #include "wtf/ASCIICType.h" 76 #include "wtf/text/AtomicString.h" 77 #include "wtf/text/WTFString.h" 78 79 namespace blink { 80 static const char propertyNameStringsPool[] = { 81 %(property_name_strings)s 82 }; 83 84 static const unsigned short propertyNameStringsOffsets[] = { 85 %(property_name_offsets)s 86 }; 87 88 %%} 89 %%struct-type 90 struct Property; 91 %%omit-struct-type 92 %%language=C++ 93 %%readonly-tables 94 %%global-table 95 %%compare-strncmp 96 %%define class-name %(class_name)sHash 97 %%define lookup-function-name findPropertyImpl 98 %%define hash-function-name property_hash_function 99 %%define slot-name nameOffset 100 %%define word-array-name property_word_list 101 %%enum 102 %%%% 103 %(property_to_enum_map)s 104 %%%% 105 const Property* findProperty(register const char* str, register unsigned int len) 106 { 107 return %(class_name)sHash::findPropertyImpl(str, len); 108 } 109 110 const char* getPropertyName(CSSPropertyID id) 111 { 112 if (id < firstCSSProperty) 113 return 0; 114 int index = id - firstCSSProperty; 115 if (index >= numCSSProperties) 116 return 0; 117 return propertyNameStringsPool + propertyNameStringsOffsets[index]; 118 } 119 120 const AtomicString& getPropertyNameAtomicString(CSSPropertyID id) 121 { 122 if (id < firstCSSProperty) 123 return nullAtom; 124 int index = id - firstCSSProperty; 125 if (index >= numCSSProperties) 126 return nullAtom; 127 128 static AtomicString* propertyStrings = new AtomicString[numCSSProperties]; // Intentionally never destroyed. 129 AtomicString& propertyString = propertyStrings[index]; 130 if (propertyString.isNull()) { 131 const char* propertyName = propertyNameStringsPool + propertyNameStringsOffsets[index]; 132 propertyString = AtomicString(propertyName, strlen(propertyName), AtomicString::ConstructFromLiteral); 133 } 134 return propertyString; 135 } 136 137 String getPropertyNameString(CSSPropertyID id) 138 { 139 // We share the StringImpl with the AtomicStrings. 140 return getPropertyNameAtomicString(id).string(); 141 } 142 143 String getJSPropertyName(CSSPropertyID id) 144 { 145 char result[maxCSSPropertyNameLength + 1]; 146 const char* cssPropertyName = getPropertyName(id); 147 const char* propertyNamePointer = cssPropertyName; 148 if (!propertyNamePointer) 149 return emptyString(); 150 151 char* resultPointer = result; 152 while (char character = *propertyNamePointer++) { 153 if (character == '-') { 154 char nextCharacter = *propertyNamePointer++; 155 if (!nextCharacter) 156 break; 157 character = (propertyNamePointer - 2 != cssPropertyName) ? toASCIIUpper(nextCharacter) : nextCharacter; 158 } 159 *resultPointer++ = character; 160 } 161 *resultPointer = '\\0'; 162 return String(result); 163 } 164 165 bool isInternalProperty(CSSPropertyID id) 166 { 167 switch (id) { 168 %(internal_properties)s 169 return true; 170 default: 171 return false; 172 } 173 } 174 175 } // namespace blink 176 """ 177 178 179 class CSSPropertyNamesWriter(css_properties.CSSProperties): 180 class_name = "CSSPropertyNames" 181 182 def __init__(self, in_file_path): 183 super(CSSPropertyNamesWriter, self).__init__(in_file_path) 184 self._outputs = {(self.class_name + ".h"): self.generate_header, 185 (self.class_name + ".cpp"): self.generate_implementation, 186 } 187 188 def _enum_declaration(self, property): 189 return " %(property_id)s = %(enum_value)s," % property 190 191 def generate_header(self): 192 return HEADER_TEMPLATE % { 193 'license': license.license_for_generated_cpp(), 194 'class_name': self.class_name, 195 'property_enums': "\n".join(map(self._enum_declaration, self._properties_list)), 196 'first_property_id': self._first_enum_value, 197 'properties_count': len(self._properties), 198 'last_property_id': self._first_enum_value + len(self._properties) - 1, 199 'max_name_length': max(map(len, self._properties)), 200 } 201 202 def generate_implementation(self): 203 property_offsets = [] 204 current_offset = 0 205 for property in self._properties_list: 206 property_offsets.append(current_offset) 207 current_offset += len(property["name"]) + 1 208 209 css_name_and_enum_pairs = [(property['name'], property_id) for property_id, property in self._properties.items()] 210 for name, aliased_name in self._aliases.items(): 211 css_name_and_enum_pairs.append((name, css_properties.css_name_to_enum(aliased_name))) 212 213 gperf_input = GPERF_TEMPLATE % { 214 'license': license.license_for_generated_cpp(), 215 'class_name': self.class_name, 216 'property_name_strings': '\n'.join(map(lambda property: ' "%(name)s\\0"' % property, self._properties_list)), 217 'property_name_offsets': '\n'.join(map(lambda offset: ' %d,' % offset, property_offsets)), 218 'property_to_enum_map': '\n'.join(map(lambda property: '%s, %s' % property, css_name_and_enum_pairs)), 219 'internal_properties': '\n'.join("case %s:" % property_id for property_id, property in self._properties.items() if property['is_internal']), 220 } 221 # FIXME: If we could depend on Python 2.7, we would use subprocess.check_output 222 gperf_args = [self.gperf_path, '--key-positions=*', '-P', '-n'] 223 gperf_args.extend(['-m', '50']) # Pick best of 50 attempts. 224 gperf_args.append('-D') # Allow duplicate hashes -> More compact code. 225 gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True) 226 return gperf.communicate(gperf_input)[0] 227 228 229 if __name__ == "__main__": 230 in_generator.Maker(CSSPropertyNamesWriter).main(sys.argv) 231
