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# 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.
# pylint: disable=relative-import
import argparse
import os
import posixpath
from code_generator import initialize_jinja_env
from idl_reader import IdlReader
from utilities import create_component_info_provider, write_file
import utilities
import v8_attributes
import v8_interface
import v8_types
import v8_utilities
INCLUDES = frozenset([
'third_party/blink/renderer/bindings/core/v8/generated_code_helper.h',
'third_party/blink/renderer/bindings/core/v8/v8_html_document.h',
'third_party/blink/renderer/bindings/core/v8/v8_initializer.h',
'third_party/blink/renderer/bindings/core/v8/v8_window.h',
'third_party/blink/renderer/platform/bindings/v8_object_constructor.h',
'v8/include/v8.h'
])
TEMPLATE_FILE = 'external_reference_table.cc.tmpl'
SNAPSHOTTED_INTERFACES = frozenset([
'Window',
'EventTarget',
'HTMLDocument',
'Document',
'Node',
])
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument(
'--idl-files-list',
type=str,
required=True,
help='file listing IDL files')
parser.add_argument(
'--output', type=str, required=True, help='output file path')
parser.add_argument(
'--info-dir',
type=str,
required=True,
help='directory contains component info')
parser.add_argument(
'--cache-dir', type=str, required=True, help='cache directory')
parser.add_argument(
'--target-component', type=str, required=True, help='target component')
return parser.parse_known_args()
# This class creates a Jinja template context about an interface.
class InterfaceTemplateContextBuilder(object):
def __init__(self, opts, info_provider):
self._opts = opts
self._info_provider = info_provider
def create_interface_context(self, interface, component, interfaces):
'''Creates a Jinja context which is based on an interface.'''
assert component in ['core', 'modules']
name = '%s%s' % (v8_utilities.cpp_name(interface),
'Partial' if interface.is_partial else '')
# Constructors
has_constructor_callback = False
if not interface.is_partial:
constructors = any(constructor.name == 'Constructor'
for constructor in interface.constructors)
custom_constructors = interface.custom_constructors
html_constructor = 'HTMLConstructor' in interface.extended_attributes
has_constructor_callback = constructors or custom_constructors or html_constructor
attributes = []
methods = []
has_cross_origin_indexed_getter = False
has_cross_origin_named_enum = False
has_cross_origin_named_getter = False
has_cross_origin_named_setter = False
has_security_check = False
indexed_property_getter = None
is_global = False
named_property_getter = None
component_info = self._info_provider.component_info
if interface.name in SNAPSHOTTED_INTERFACES:
attributes = [
v8_attributes.attribute_context(interface, attribute,
interfaces, component_info)
for attribute in interface.attributes
]
methods = v8_interface.methods_context(interface,
component_info)['methods']
is_global = 'Global' in interface.extended_attributes
named_property_getter = v8_interface.property_getter(
interface.named_property_getter, ['name'])
indexed_property_getter = v8_interface.property_getter(
interface.indexed_property_getter, ['index'])
if not interface.is_partial:
has_security_check = (
'CheckSecurity' in interface.extended_attributes
and interface.name != 'EventTarget')
has_cross_origin_named_getter = (
any(method['is_cross_origin'] for method in methods)
or any(attribute['has_cross_origin_getter']
for attribute in attributes))
has_cross_origin_named_setter = any(
attribute['has_cross_origin_setter']
for attribute in attributes)
has_cross_origin_indexed_getter = (
indexed_property_getter
and indexed_property_getter['is_cross_origin'])
has_cross_origin_named_enum = has_cross_origin_named_getter \
or has_cross_origin_named_setter
if (named_property_getter
and named_property_getter['is_cross_origin']):
has_cross_origin_named_getter = True
return {
'attributes':
attributes,
'component':
component,
'has_constructor_callback':
has_constructor_callback,
'has_cross_origin_named_getter':
has_cross_origin_named_getter,
'has_cross_origin_named_setter':
has_cross_origin_named_setter,
'has_cross_origin_named_enumerator':
has_cross_origin_named_enum,
'has_cross_origin_indexed_getter':
has_cross_origin_indexed_getter,
'has_security_check':
has_security_check,
'indexed_property_getter':
indexed_property_getter,
'indexed_property_setter':
v8_interface.property_setter(interface.indexed_property_setter,
interface),
'indexed_property_deleter':
v8_interface.property_deleter(interface.indexed_property_deleter),
'internal_namespace':
v8_interface.internal_namespace(interface),
'is_partial':
interface.is_partial,
'methods':
methods,
'name':
name,
'named_constructor':
v8_interface.named_constructor_context(interface),
'named_property_getter':
named_property_getter,
'named_property_setter':
v8_interface.property_setter(interface.named_property_setter,
interface),
'named_property_deleter':
v8_interface.property_deleter(interface.named_property_deleter),
'v8_class':
v8_utilities.v8_class_name_or_partial(interface),
}
# This class applies a Jinja template and creates a .cpp file for the external reference table.
class ExternalReferenceTableGenerator(object):
def __init__(self, opts, info_provider):
self._opts = opts
self._info_provider = info_provider
self._reader = IdlReader(info_provider.interfaces_info, opts.cache_dir)
self._interface_contexts = {}
self._include_files = set(INCLUDES)
v8_types.set_component_dirs(
info_provider.interfaces_info['component_dirs'])
# Creates a Jinja context from an IDL file.
def process_idl_file(self, idl_filename):
definitions = self._reader.read_idl_definitions(idl_filename)
for component in definitions:
target_definitions = definitions[component]
interfaces = target_definitions.interfaces
first_name = target_definitions.first_name
if first_name in interfaces.keys():
interface = interfaces[first_name]
self._process_interface(interface, component, interfaces)
# Creates a Jinja context from an interface. Some interfaces are not used
# in V8 context snapshot, so we can skip them.
def _process_interface(self, interface, component, interfaces):
def has_impl(interface):
component_info = self._info_provider.component_info
runtime_features = component_info['runtime_enabled_features']
# Non legacy callback interface does not provide V8 callbacks.
if interface.is_callback:
return len(interface.constants) > 0
if v8_utilities.runtime_enabled_feature_name(
interface, runtime_features):
return False
if 'Exposed' not in interface.extended_attributes:
return True
return any(
exposure.exposed == 'Window'
and exposure.runtime_enabled is None
for exposure in interface.extended_attributes['Exposed'])
if not has_impl(interface):
return
context_builder = InterfaceTemplateContextBuilder(
self._opts, self._info_provider)
context = context_builder.create_interface_context(
interface, component, interfaces)
name = '%s%s' % (interface.name,
'Partial' if interface.is_partial else '')
self._interface_contexts[name] = context
# Do not include unnecessary header files.
if not context['attributes'] and not context['named_property_setter']:
return
include_file = 'third_party/blink/renderer/bindings/%s/v8/%s.h' % (
component, utilities.to_snake_case(context['v8_class']))
self._include_files.add(include_file)
# Gathers all interface-dependent information and returns as a Jinja template context.
def _create_template_context(self):
interfaces = []
for name in sorted(self._interface_contexts):
interfaces.append(self._interface_contexts[name])
header_path = 'third_party/blink/renderer/bindings/modules/v8/v8_context_snapshot_external_references.h'
include_files = list(self._include_files)
return {
'class': 'V8ContextSnapshotExternalReferences',
'interfaces': interfaces,
'include_files': sorted(include_files),
'this_include_header_path': header_path,
'code_generator': os.path.basename(__file__),
'jinja_template_filename': TEMPLATE_FILE
}
# Applies a Jinja template on a context and generates a C++ code.
def generate(self):
jinja_env = initialize_jinja_env(self._opts.cache_dir)
context = self._create_template_context()
cpp_template = jinja_env.get_template(TEMPLATE_FILE)
cpp_text = cpp_template.render(context)
return cpp_text
def main():
opts, _ = parse_args()
# TODO(peria): get rid of |info_provider|
info_provider = create_component_info_provider(opts.info_dir,
opts.target_component)
generator = ExternalReferenceTableGenerator(opts, info_provider)
idl_files = utilities.read_idl_files_list_from_file(opts.idl_files_list)
for idl_file in idl_files:
generator.process_idl_file(idl_file)
output_code = generator.generate()
output_path = opts.output
write_file(output_code, output_path)
if __name__ == '__main__':
main()
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