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 <string.h> 21 22 namespace WebCore { 23 24 enum CSSValueID { 25 %(value_keyword_enums)s 26 }; 27 28 const int numCSSValueKeywords = %(value_keywords_count)d; 29 const size_t maxCSSValueKeywordLength = %(max_value_keyword_length)d; 30 31 const char* getValueName(unsigned short id); 32 bool isValueAllowedInMode(unsigned short id, CSSParserMode mode); 33 34 } // namespace WebCore 35 36 #endif // %(class_name)s_h 37 """ 38 39 GPERF_TEMPLATE = """ 40 %%{ 41 %(license)s 42 43 #include "config.h" 44 #include "%(class_name)s.h" 45 #include "core/platform/HashTools.h" 46 #include <string.h> 47 48 namespace WebCore { 49 static const char valueListStringPool[] = { 50 "\\0" 51 %(value_keyword_strings)s 52 }; 53 54 static const unsigned short valueListStringOffsets[] = { 55 %(value_keyword_offsets)s 56 }; 57 58 %%} 59 %%struct-type 60 struct Value; 61 %%omit-struct-type 62 %%language=C++ 63 %%readonly-tables 64 %%compare-strncmp 65 %%define class-name %(class_name)sHash 66 %%define lookup-function-name findValueImpl 67 %%define hash-function-name value_hash_function 68 %%define slot-name nameOffset 69 %%define word-array-name value_word_list 70 %%pic 71 %%enum 72 %%%% 73 %(value_keyword_to_enum_map)s 74 %%%% 75 const Value* findValue(register const char* str, register unsigned int len) 76 { 77 return CSSValueKeywordsHash::findValueImpl(str, len); 78 } 79 80 const char* getValueName(unsigned short id) 81 { 82 if (id >= numCSSValueKeywords || id <= 0) 83 return 0; 84 return valueListStringPool + valueListStringOffsets[id]; 85 } 86 87 bool isValueAllowedInMode(unsigned short id, CSSParserMode mode) 88 { 89 switch (id) { 90 %(ua_sheet_mode_values_keywords)s 91 return mode == UASheetMode; 92 %(quirks_mode_values_keywords)s 93 return mode == CSSQuirksMode; 94 %(quirks_mode_or_ua_sheet_mode_values_keywords)s 95 return mode == UASheetMode || mode == CSSQuirksMode; 96 default: 97 return true; 98 } 99 } 100 101 } // namespace WebCore 102 """ 103 104 105 class CSSValueKeywordsWriter(in_generator.Writer): 106 class_name = "CSSValueKeywords" 107 defaults = { 108 'condition': None, 109 'mode': None, 110 } 111 112 def __init__(self, file_paths, enabled_conditions): 113 in_generator.Writer.__init__(self, file_paths, enabled_conditions) 114 self._outputs = {(self.class_name + ".h"): self.generate_header, 115 (self.class_name + ".cpp"): self.generate_implementation, 116 } 117 118 all_properties = self.in_file.name_dictionaries 119 self._value_keywords = filter(lambda property: not property['condition'] or property['condition'] in self._enabled_conditions, all_properties) 120 first_property_id = 1 121 for offset, property in enumerate(self._value_keywords): 122 property['name'] = property['name'].lower() 123 property['enum_name'] = self._enum_name_from_value_keyword(property['name']) 124 property['enum_value'] = first_property_id + offset 125 if property['name'].startswith('-internal-'): 126 assert property['mode'] is None, 'Can\'t specify mode for value keywords with the prefix "-internal-".' 127 property['mode'] = 'UASheet' 128 else: 129 assert property['mode'] != 'UASheet', 'UASheet mode only value keywords should have the prefix "-internal-".' 130 131 def _enum_name_from_value_keyword(self, value_keyword): 132 return "CSSValue" + "".join(w.capitalize() for w in value_keyword.split("-")) 133 134 def _enum_declaration(self, property): 135 return " %(enum_name)s = %(enum_value)s," % property 136 137 def _case_value_keyword(self, property): 138 return "case %(enum_name)s:" % property 139 140 def generate_header(self): 141 enum_enties = map(self._enum_declaration, [{'enum_name': 'CSSValueInvalid', 'enum_value': 0}] + self._value_keywords) 142 return HEADER_TEMPLATE % { 143 'license': license.license_for_generated_cpp(), 144 'class_name': self.class_name, 145 'value_keyword_enums': "\n".join(enum_enties), 146 'value_keywords_count': len(enum_enties), 147 'max_value_keyword_length': reduce(max, map(len, map(lambda property: property['name'], self._value_keywords))), 148 } 149 150 def _value_keywords_with_mode(self, mode): 151 return filter(lambda property: property['mode'] == mode, self._value_keywords) 152 153 def generate_implementation(self): 154 keyword_offsets = [0] 155 current_offset = 1 156 for keyword in self._value_keywords: 157 keyword_offsets.append(current_offset) 158 current_offset += len(keyword["name"]) + 1 159 160 gperf_input = GPERF_TEMPLATE % { 161 'license': license.license_for_generated_cpp(), 162 'class_name': self.class_name, 163 'value_keyword_strings': '\n'.join(map(lambda property: ' "%(name)s\\0"' % property, self._value_keywords)), 164 'value_keyword_offsets': '\n'.join(map(lambda offset: ' %d,' % offset, keyword_offsets)), 165 'value_keyword_to_enum_map': '\n'.join(map(lambda property: '%(name)s, %(enum_name)s' % property, self._value_keywords)), 166 'ua_sheet_mode_values_keywords': '\n '.join(map(self._case_value_keyword, self._value_keywords_with_mode('UASheet'))), 167 'quirks_mode_values_keywords': '\n '.join(map(self._case_value_keyword, self._value_keywords_with_mode('Quirks'))), 168 'quirks_mode_or_ua_sheet_mode_values_keywords': '\n '.join(map(self._case_value_keyword, self._value_keywords_with_mode('QuirksOrUASheet'))), 169 } 170 # FIXME: If we could depend on Python 2.7, we would use subprocess.check_output 171 gperf_args = ['gperf', '--key-positions=*', '-D', '-n', '-s', '2'] 172 gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE) 173 return gperf.communicate(gperf_input)[0] 174 175 176 if __name__ == "__main__": 177 in_generator.Maker(CSSValueKeywordsWriter).main(sys.argv) 178
