1#!/usr/bin/env python 2 3import os.path 4import re 5import subprocess 6import sys 7 8from in_file import InFile 9import in_generator 10import license 11 12 13HEADER_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 22namespace WebCore { 23 24enum CSSValueID { 25%(value_keyword_enums)s 26}; 27 28const int numCSSValueKeywords = %(value_keywords_count)d; 29const size_t maxCSSValueKeywordLength = %(max_value_keyword_length)d; 30 31const char* getValueName(unsigned short id); 32bool isValueAllowedInMode(unsigned short id, CSSParserMode mode); 33 34} // namespace WebCore 35 36#endif // %(class_name)s_h 37""" 38 39GPERF_TEMPLATE = """ 40%%{ 41%(license)s 42 43#include "config.h" 44#include "%(class_name)s.h" 45#include "core/css/HashTools.h" 46#include <string.h> 47 48namespace WebCore { 49static const char valueListStringPool[] = { 50"\\0" 51%(value_keyword_strings)s 52}; 53 54static const unsigned short valueListStringOffsets[] = { 55%(value_keyword_offsets)s 56}; 57 58%%} 59%%struct-type 60struct 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%%%% 75const Value* findValue(register const char* str, register unsigned int len) 76{ 77 return CSSValueKeywordsHash::findValueImpl(str, len); 78} 79 80const char* getValueName(unsigned short id) 81{ 82 if (id >= numCSSValueKeywords || id <= 0) 83 return 0; 84 return valueListStringPool + valueListStringOffsets[id]; 85} 86 87bool isValueAllowedInMode(unsigned short id, CSSParserMode mode) 88{ 89 switch (id) { 90 %(ua_sheet_mode_values_keywords)s 91 return isUASheetBehavior(mode); 92 %(quirks_mode_or_ua_sheet_mode_values_keywords)s 93 return isUASheetBehavior(mode) || isQuirksModeBehavior(mode); 94 default: 95 return true; 96 } 97} 98 99} // namespace WebCore 100""" 101 102 103class CSSValueKeywordsWriter(in_generator.Writer): 104 class_name = "CSSValueKeywords" 105 defaults = { 106 'mode': None, 107 } 108 109 def __init__(self, file_paths): 110 in_generator.Writer.__init__(self, file_paths) 111 self._outputs = {(self.class_name + ".h"): self.generate_header, 112 (self.class_name + ".cpp"): self.generate_implementation, 113 } 114 115 self._value_keywords = self.in_file.name_dictionaries 116 first_property_id = 1 117 for offset, property in enumerate(self._value_keywords): 118 property['name'] = property['name'].lower() 119 property['enum_name'] = self._enum_name_from_value_keyword(property['name']) 120 property['enum_value'] = first_property_id + offset 121 if property['name'].startswith('-internal-'): 122 assert property['mode'] is None, 'Can\'t specify mode for value keywords with the prefix "-internal-".' 123 property['mode'] = 'UASheet' 124 else: 125 assert property['mode'] != 'UASheet', 'UASheet mode only value keywords should have the prefix "-internal-".' 126 127 def _enum_name_from_value_keyword(self, value_keyword): 128 return "CSSValue" + "".join(w.capitalize() for w in value_keyword.split("-")) 129 130 def _enum_declaration(self, property): 131 return " %(enum_name)s = %(enum_value)s," % property 132 133 def _case_value_keyword(self, property): 134 return "case %(enum_name)s:" % property 135 136 def generate_header(self): 137 enum_enties = map(self._enum_declaration, [{'enum_name': 'CSSValueInvalid', 'enum_value': 0}] + self._value_keywords) 138 return HEADER_TEMPLATE % { 139 'license': license.license_for_generated_cpp(), 140 'class_name': self.class_name, 141 'value_keyword_enums': "\n".join(enum_enties), 142 'value_keywords_count': len(enum_enties), 143 'max_value_keyword_length': reduce(max, map(len, map(lambda property: property['name'], self._value_keywords))), 144 } 145 146 def _value_keywords_with_mode(self, mode): 147 return filter(lambda property: property['mode'] == mode, self._value_keywords) 148 149 def generate_implementation(self): 150 keyword_offsets = [0] 151 current_offset = 1 152 for keyword in self._value_keywords: 153 keyword_offsets.append(current_offset) 154 current_offset += len(keyword["name"]) + 1 155 156 gperf_input = GPERF_TEMPLATE % { 157 'license': license.license_for_generated_cpp(), 158 'class_name': self.class_name, 159 'value_keyword_strings': '\n'.join(map(lambda property: ' "%(name)s\\0"' % property, self._value_keywords)), 160 'value_keyword_offsets': '\n'.join(map(lambda offset: ' %d,' % offset, keyword_offsets)), 161 'value_keyword_to_enum_map': '\n'.join(map(lambda property: '%(name)s, %(enum_name)s' % property, self._value_keywords)), 162 'ua_sheet_mode_values_keywords': '\n '.join(map(self._case_value_keyword, self._value_keywords_with_mode('UASheet'))), 163 'quirks_mode_or_ua_sheet_mode_values_keywords': '\n '.join(map(self._case_value_keyword, self._value_keywords_with_mode('QuirksOrUASheet'))), 164 } 165 # FIXME: If we could depend on Python 2.7, we would use subprocess.check_output 166 gperf_args = [self.gperf_path, '--key-positions=*', '-P', '-n'] 167 gperf_args.extend(['-m', '50']) # Pick best of 50 attempts. 168 gperf_args.append('-D') # Allow duplicate hashes -> More compact code. 169 gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True) 170 return gperf.communicate(gperf_input)[0] 171 172 173if __name__ == "__main__": 174 in_generator.Maker(CSSValueKeywordsWriter).main(sys.argv) 175