| #!/usr/bin/env python |
| # Copyright 2014 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 sys |
| from collections import defaultdict |
| |
| import hasher |
| import json5_generator |
| import template_expander |
| |
| from blinkbuild.name_style_converter import NameStyleConverter |
| |
| |
| def _symbol(tag): |
| return 'k' + tag['name'].to_upper_camel_case() |
| |
| |
| class MakeElementTypeHelpersWriter(json5_generator.Writer): |
| default_parameters = { |
| 'Conditional': {}, |
| 'ImplementedAs': {}, |
| 'JSInterfaceName': {}, |
| 'constructorNeedsCreateElementFlags': {}, |
| 'interfaceHeaderDir': {}, |
| 'interfaceName': {}, |
| 'noConstructor': {}, |
| 'noTypeHelpers': {}, |
| 'runtimeEnabled': {}, |
| } |
| default_metadata = { |
| 'attrsNullNamespace': None, |
| 'export': '', |
| 'fallbackInterfaceName': '', |
| 'fallbackJSInterfaceName': '', |
| 'namespace': '', |
| 'namespacePrefix': '', |
| 'namespaceURI': '', |
| } |
| filters = { |
| 'hash': hasher.hash, |
| 'symbol': _symbol, |
| } |
| |
| def __init__(self, json5_file_path, output_dir): |
| super(MakeElementTypeHelpersWriter, self).__init__( |
| json5_file_path, output_dir) |
| |
| self.namespace = self.json5_file.metadata['namespace'].strip('"') |
| self.fallback_interface = self.json5_file.metadata[ |
| 'fallbackInterfaceName'].strip('"') |
| |
| assert self.namespace, 'A namespace is required.' |
| |
| basename = self.namespace.lower() + '_element_type_helpers' |
| self._outputs = { |
| (basename + '.h'): self.generate_helper_header, |
| (basename + '.cc'): self.generate_helper_implementation, |
| } |
| |
| base_element_header = 'third_party/blink/renderer/core/{}/{}_element.h'.format( |
| self.namespace.lower(), |
| NameStyleConverter(self.namespace).to_snake_case()) |
| self._template_context = { |
| 'base_element_header': base_element_header, |
| 'cpp_namespace': self.namespace.lower() + '_names', |
| 'input_files': self._input_files, |
| 'namespace': self.namespace, |
| 'tags': self.json5_file.name_dictionaries, |
| 'elements': set(), |
| } |
| |
| tags = self._template_context['tags'] |
| elements = self._template_context['elements'] |
| interface_counts = defaultdict(int) |
| for tag in tags: |
| tag['interface'] = self._interface(tag) |
| interface_counts[tag['interface']] += 1 |
| tag['js_interface'] = tag['interface'] |
| if tag['JSInterfaceName']: |
| tag['js_interface'] = tag['JSInterfaceName'] |
| elements.add(tag['js_interface']) |
| |
| for tag in tags: |
| tag['multipleTagNames'] = ( |
| interface_counts[tag['interface']] > 1 |
| or tag['interface'] == self.fallback_interface) |
| |
| @template_expander.use_jinja( |
| "templates/element_type_helpers.h.tmpl", filters=filters) |
| def generate_helper_header(self): |
| return self._template_context |
| |
| @template_expander.use_jinja( |
| "templates/element_type_helpers.cc.tmpl", filters=filters) |
| def generate_helper_implementation(self): |
| return self._template_context |
| |
| def _interface(self, tag): |
| if tag['interfaceName']: |
| return tag['interfaceName'] |
| name = tag['name'].to_upper_camel_case() |
| # FIXME: We shouldn't hard-code HTML here. |
| if name == 'HTML': |
| name = 'Html' |
| return '%s%sElement' % (self.namespace, name) |
| |
| |
| if __name__ == "__main__": |
| json5_generator.Maker(MakeElementTypeHelpersWriter).main() |
