| #!/usr/bin/env python |
| # Copyright 2017 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import gperf |
| import json5_generator |
| import template_expander |
| |
| |
| class AtRuleNamesWriter(json5_generator.Writer): |
| """ |
| Generates AtRuleNames. This class provides utility methods for parsing |
| @rules (e.g. @font-face, @keyframes, etc) |
| """ |
| |
| def __init__(self, json5_file_paths, output_dir): |
| super(AtRuleNamesWriter, self).__init__(json5_file_paths, output_dir) |
| |
| self._outputs = { |
| 'at_rule_descriptors.h': self.generate_header, |
| 'at_rule_descriptors.cc': self.generate_implementation |
| } |
| |
| self._descriptors = self.json5_file.name_dictionaries |
| self._character_offsets = [] |
| |
| # AtRuleDescriptorID::Invalid is 0. |
| first_descriptor_id = 1 |
| # Aliases are resolved immediately at parse time, and thus don't appear |
| # in the enum. |
| self._descriptors_count = len(self._descriptors) + first_descriptor_id |
| chars_used = 0 |
| self._longest_name_length = 0 |
| for offset, descriptor in enumerate(self._descriptors): |
| descriptor['enum_value'] = first_descriptor_id + offset |
| self._character_offsets.append(chars_used) |
| chars_used += len(descriptor['name'].original) |
| self._longest_name_length = max( |
| len(descriptor['name'].original), len(descriptor['alias']), |
| self._longest_name_length) |
| |
| @template_expander.use_jinja( |
| 'core/css/parser/templates/at_rule_descriptors.h.tmpl') |
| def generate_header(self): |
| return { |
| 'descriptors': self._descriptors, |
| 'descriptors_count': self._descriptors_count |
| } |
| |
| @gperf.use_jinja_gperf_template( |
| 'core/css/parser/templates/at_rule_descriptors.cc.tmpl') |
| def generate_implementation(self): |
| return { |
| 'descriptors': self._descriptors, |
| 'descriptor_offsets': self._character_offsets, |
| 'descriptors_count': len(self._descriptors), |
| 'longest_name_length': self._longest_name_length, |
| 'gperf_path': self.gperf_path |
| } |
| |
| |
| if __name__ == '__main__': |
| json5_generator.Maker(AtRuleNamesWriter).main() |
