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# Copyright 2021 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 web_idl
from . import name_style
from .blink_v8_bridge import blink_class_name
from .code_node import EmptyNode
from .code_node import ListNode
from .code_node import TextNode
from .code_node_cxx import CxxNamespaceNode
from .codegen_accumulator import CodeGenAccumulator
from .codegen_utils import enclose_with_header_guard
from .codegen_utils import make_copyright_header
from .codegen_utils import make_forward_declarations
from .codegen_utils import make_header_include_directives
from .codegen_utils import write_code_node_to_file
from .mako_renderer import MakoRenderer
from .package_initializer import package_initializer
from .path_manager import PathManager
from .task_queue import TaskQueue
def _make_typedefs_to_unions(typedefs, component_selector):
assert isinstance(typedefs, (list, tuple))
assert all(isinstance(typedef, web_idl.Typedef) for typedef in typedefs)
assert callable(component_selector)
new_and_old_names = list(
map(
lambda typedef: (blink_class_name(typedef),
blink_class_name(typedef.idl_type.
union_definition_object)),
filter(
lambda typedef: component_selector(
[typedef, typedef.idl_type.union_definition_object]),
filter(lambda typedef: typedef.idl_type.is_union, typedefs))))
node = ListNode([
TextNode("using {} = {};".format(new_name, old_name))
for new_name, old_name in new_and_old_names
])
node.accumulate(
CodeGenAccumulator.require_class_decls(
[old_name for _, old_name in new_and_old_names]))
return node
def make_typedefs(typedefs, component_selector):
assert isinstance(typedefs, (list, tuple))
assert all(isinstance(typedef, web_idl.Typedef) for typedef in typedefs)
assert callable(component_selector)
return ListNode([
TextNode("// Typedefs to IDL unions"),
_make_typedefs_to_unions(typedefs, component_selector),
])
def _make_unions_of_typedefed_member_types(unions, component_selector):
assert isinstance(unions, (list, tuple))
assert all(isinstance(union, web_idl.Union) for union in unions)
assert callable(component_selector)
def union_name_of_typedefed_members(idl_type, union):
for member_type in idl_type.member_types:
if member_type.unwrap(nullable=True).is_typedef:
break
else:
return None
pieces = []
def_objs = [union]
for member_type in idl_type.member_types:
body_type = member_type.unwrap(nullable=True)
if body_type.is_typedef:
pieces.append(body_type.typedef_object.identifier)
def_objs.append(body_type.typedef_object)
else:
pieces.append(
body_type.type_name_with_extended_attribute_key_values)
if not component_selector(def_objs):
return None
pieces = sorted(pieces)
if idl_type.does_include_nullable_type:
pieces.append("Null")
return "V8Union{}".format("Or".join(pieces))
node = ListNode()
fwd_decl_names = []
for union in unions:
if not union.typedef_members:
continue
new_names = sorted(
set(
filter(
None,
map(
lambda idl_type: union_name_of_typedefed_members(
idl_type, union), union.idl_types))))
old_name = blink_class_name(union)
for new_name in new_names:
node.append(TextNode("using {} = {};".format(new_name, old_name)))
if new_names:
fwd_decl_names.append(old_name)
node.accumulate(CodeGenAccumulator.require_class_decls(fwd_decl_names))
return node
def make_unions(unions, component_selector):
assert isinstance(unions, (list, tuple))
assert all(isinstance(union, web_idl.Union) for union in unions)
assert callable(component_selector)
return ListNode([
TextNode("// Unions including typedef'ed member types"),
_make_unions_of_typedefed_member_types(unions, component_selector),
])
def generate_typedefs_all(filepath_basename):
assert isinstance(filepath_basename, str)
web_idl_database = package_initializer().web_idl_database()
# Components
c1 = web_idl.Component("core")
c2 = web_idl.Component("modules")
components = (c1, c2)
# Filepaths
header_path = {}
for component in components:
header_path[component] = PathManager.component_path(
component, "{}.h".format(filepath_basename))
# Root nodes
header_node = {}
for component in components:
node = ListNode(tail="\n")
node.set_accumulator(CodeGenAccumulator())
node.set_renderer(MakoRenderer())
header_node[component] = node
# Namespaces
header_blink_ns = {}
for component in components:
node = CxxNamespaceNode(name_style.namespace("blink"))
header_blink_ns[component] = node
# Header part (copyright, include directives, and forward declarations)
for component in components:
header_node[component].extend([
make_copyright_header(),
EmptyNode(),
enclose_with_header_guard(
ListNode([
make_header_include_directives(
header_node[component].accumulator),
EmptyNode(),
header_blink_ns[component],
]), name_style.header_guard(header_path[component])),
])
header_blink_ns[component].body.extend([
make_forward_declarations(header_node[component].accumulator),
EmptyNode(),
])
# Implementation parts
component_selectors = {
c1: lambda xs: all(c2 not in x.components for x in xs),
c2: lambda xs: any(c2 in x.components for x in xs),
}
all_typedefs = sorted(web_idl_database.typedefs,
key=lambda x: x.identifier)
for component in components:
header_blink_ns[component].body.extend([
make_typedefs(all_typedefs, component_selectors[component]),
EmptyNode(),
])
all_unions = sorted(web_idl_database.union_types,
key=lambda x: x.identifier)
for component in components:
header_blink_ns[component].body.extend([
make_unions(all_unions, component_selectors[component]),
EmptyNode(),
])
# Write down to the files.
for component in components:
write_code_node_to_file(
header_node[component],
PathManager.gen_path_to(header_path[component]))
def generate_typedefs(task_queue):
assert isinstance(task_queue, TaskQueue)
task_queue.post_task(generate_typedefs_all, "v8_typedefs")
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