| #!/usr/bin/env python |
| # Copyright 2016 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. |
| |
| from collections import namedtuple |
| import math |
| import sys |
| |
| import in_generator |
| import template_expander |
| import make_style_builder |
| |
| |
| class ComputedStyleBaseWriter(make_style_builder.StyleBuilderWriter): |
| def __init__(self, in_file_path): |
| super(ComputedStyleBaseWriter, self).__init__(in_file_path) |
| self._outputs = { |
| 'ComputedStyleBase.h': self.generate_base_computed_style_h, |
| 'ComputedStyleBase.cpp': self.generate_base_computed_style_cpp, |
| 'ComputedStyleBaseConstants.h': self.generate_base_computed_style_constants, |
| } |
| |
| # A map of enum name -> list of enum values |
| self._computed_enums = {} |
| for property in self._properties.values(): |
| if property['keyword_only']: |
| enum_name = property['type_name'] |
| # From the Blink style guide: Enum members should use InterCaps with an initial capital letter. [names-enum-members] |
| enum_values = [k.title() for k in property['keywords']] |
| self._computed_enums[enum_name] = enum_values |
| |
| # A list of fields |
| Field = namedtuple('Field', [ |
| # Name of field member variable |
| 'name', |
| # Property field is for |
| 'property', |
| # Field storage type |
| 'type', |
| # Bits needed for storage |
| 'size', |
| # Default value for field |
| 'default_value', |
| ]) |
| self._fields = [] |
| for property in self._properties.values(): |
| if property['keyword_only']: |
| # From the Blink style guide: Other data members should be prefixed by "m_". [names-data-members] |
| field_name = 'm_' + property['lower_camel_name'] |
| bits_needed = math.log(len(property['keywords']), 2) |
| type_name = property['type_name'] |
| # For now, assume the default value is the first enum value. |
| default_value = type_name + '::' + self._computed_enums[type_name][0] |
| self._fields.append(Field( |
| name=field_name, |
| property=property, |
| type=type_name, |
| size=int(math.ceil(bits_needed)), |
| default_value=default_value, |
| )) |
| |
| @template_expander.use_jinja('ComputedStyleBase.h.tmpl') |
| def generate_base_computed_style_h(self): |
| return { |
| 'properties': self._properties, |
| 'enums': self._computed_enums, |
| 'fields': self._fields, |
| } |
| |
| @template_expander.use_jinja('ComputedStyleBase.cpp.tmpl') |
| def generate_base_computed_style_cpp(self): |
| return { |
| 'properties': self._properties, |
| 'enums': self._computed_enums, |
| 'fields': self._fields, |
| } |
| |
| @template_expander.use_jinja('ComputedStyleBaseConstants.h.tmpl') |
| def generate_base_computed_style_constants(self): |
| return { |
| 'properties': self._properties, |
| 'enums': self._computed_enums, |
| 'fields': self._fields, |
| } |
| |
| if __name__ == '__main__': |
| in_generator.Maker(ComputedStyleBaseWriter).main(sys.argv) |