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