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flutter_flutter/sky/engine/bindings/scripts/dart_methods.py
Hixie 87e83e552d Remove EventTarget, and subsequent fallout. 
The primary goal of this change was to remove EventTarget from the
sky_engine C++ code. Since EventTarget is so core to the entire event
system that sky_engine was based on, this is a rather invasive change.
As such, it had some knock-on effects. I deleted some of the files
that were affected, and cauterised the remainder.

In many cases, a file would depend on another file that it didn't
include directly, but instead included indirectly via another file
that I deleted. When this happened, if the features that this broke
were obsolete, I sometimes just removed the features instead.

Specifically:
- removed EventTarget
- removed EventQueue, since without a target, what's a queue going to
  do?
- same with EventDispatch*
- removed ExecutionContext, since it had an EventQueue and nothing
  else it did was relevant to Sky anymore
- removed ActiveDOMObject, which was all about ExecutionContexts
- removed ContextLifecycleNotifier since it dependend on
  ExecutionContext and ActiveDOMObject
- removed the other Lifecycle classes for consistency, and replaced
  them with four booleans in the Document class
- removed some of the attributes that are no longer relevant from
  IDLExtendedAttributes (ConstructorCallWith and
  CallWith=ExecutionContext)
- removed the Document member on DOMDartState since we never set it to
  anything but null.
- removed BuiltinSky::InstallWindow since it relied on the Document
  member of DOMDartState
- removed EventHandler, EventListener, and mentions of those in
  various binding scripts
- removed NewEventHandler, since we're not using that either
- removed the following interfaces from the Sky Dart API:
  - EventTarget
  - EventListener (since without a target, there's no way to listen)
  - FocusEvent (since it's only member was an EventTarget)
  - HashChangeEvent (mostly by accident, but it's defunct anyway)
  - FontFace (it used ConstructorCallWith=ExecutionContext)
- changed the following interfaces of the Sky DART API:
  - MediaQueryList is no longer an EventTarget
  - Node is no longer an EventTarget
  - Document no longer has defaultView (depended on
    DOMDartState's document)
  - DocumentFragment, Element, Range, and Text no longer have a
    constructor (they all depended on DOMDartState's document, which
    is now gone)
  - Event lost its EventTarget members and path.
  - Window lost its WindowTimers partial interface (it used
    EventTarget and ExecutionContext a lot)
- removed numerous hacks in the bindings around features that are now
  gone, like addEventListener
- removed a bunch of console logging code, since that relied on
  ExecutionContext
- cauterised the wound in FontFace.cpp by removing constructors and
  methods that called now-removed features
- same with MediaQuery and friends
- same with some editor features and focus-related features
- same with Document
- removed DOMTimer classes since they use ExecutionContexts
2015-07-16 14:40:10 -07:00

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# Copyright (C) 2013 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Generate template values for methods.
Extends IdlType and IdlUnionType with property |union_arguments|.
Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
"""
from idl_types import inherits_interface
import dart_types
from dart_utilities import DartUtilities
from v8_globals import includes
import v8_methods
def method_context(interface, method):
context = v8_methods.method_context(interface, method)
arguments = method.arguments
extended_attributes = method.extended_attributes
idl_type = method.idl_type
# idl_type.add_includes_for_type()
this_cpp_value = cpp_value(interface, method, len(arguments))
if context['is_call_with_script_state']:
includes.add('bindings/core/dart/DartScriptState.h')
if idl_type.union_arguments and len(idl_type.union_arguments) > 0:
this_cpp_type = []
for cpp_type in idl_type.member_types:
this_cpp_type.append("RefPtr<%s>" % cpp_type)
else:
this_cpp_type = idl_type.cpp_type
is_auto_scope = not 'DartNoAutoScope' in extended_attributes
arguments_data = [argument_context(interface, method, argument, index)
for index, argument in enumerate(arguments)]
union_arguments = []
if idl_type.union_arguments:
union_arguments.extend([union_arg['cpp_value']
for union_arg in idl_type.union_arguments])
is_custom = 'Custom' in extended_attributes or 'DartCustom' in extended_attributes
context.update({
'arguments': arguments_data,
'cpp_type': this_cpp_type,
'cpp_value': this_cpp_value,
'dart_type': dart_types.idl_type_to_dart_type(idl_type),
'dart_name': extended_attributes.get('DartName'),
'has_exception_state':
context['is_raises_exception'] or
any(argument for argument in arguments
if argument.idl_type.name == 'SerializedScriptValue' or
argument.idl_type.is_integer_type),
'is_auto_scope': is_auto_scope,
'auto_scope': DartUtilities.bool_to_cpp(is_auto_scope),
'is_custom': is_custom,
'is_custom_dart': 'DartCustom' in extended_attributes,
'is_custom_dart_new': DartUtilities.has_extended_attribute_value(method, 'DartCustom', 'New'),
# FIXME(terry): DartStrictTypeChecking no longer supported; TypeChecking is
# new extended attribute.
'is_strict_type_checking':
'DartStrictTypeChecking' in extended_attributes or
'DartStrictTypeChecking' in interface.extended_attributes,
'union_arguments': union_arguments,
'dart_set_return_value': dart_set_return_value(interface.name, method, this_cpp_value),
})
return context
def argument_context(interface, method, argument, index):
context = v8_methods.argument_context(interface, method, argument, index)
extended_attributes = argument.extended_attributes
idl_type = argument.idl_type
this_cpp_value = cpp_value(interface, method, index)
auto_scope = not 'DartNoAutoScope' in extended_attributes
arg_index = index + 1 if not method.is_static else index
preprocessed_type = str(idl_type.preprocessed_type)
local_cpp_type = idl_type.cpp_type_args(argument.extended_attributes, raw_type=True)
default_value = argument.default_cpp_value
if context['has_default']:
default_value = (argument.default_cpp_value or
dart_types.default_cpp_value_for_cpp_type(idl_type))
dart_type = dart_types.idl_type_to_dart_type(idl_type)
dart_default_value = dart_types.dart_default_value(dart_type, argument)
context.update({
'cpp_type': idl_type.cpp_type_args(extended_attributes=extended_attributes,
raw_type=True,
used_in_cpp_sequence=False),
'dart_type': dart_type,
'implemented_as': idl_type.implemented_as,
'cpp_value': this_cpp_value,
'local_cpp_type': local_cpp_type,
# FIXME: check that the default value's type is compatible with the argument's
'default_value': default_value,
'is_named': 'Named' in extended_attributes,
'dart_default_value': dart_default_value,
'enum_validation_expression': idl_type.enum_validation_expression,
'preprocessed_type': preprocessed_type,
'is_array_or_sequence_type': not not idl_type.native_array_element_type,
'is_strict_type_checking': 'DartStrictTypeChecking' in extended_attributes,
'dart_set_return_value_for_main_world': dart_set_return_value(interface.name, method,
this_cpp_value, for_main_world=True),
'dart_set_return_value': dart_set_return_value(interface.name, method, this_cpp_value),
'arg_index': arg_index,
'dart_value_to_local_cpp_value': dart_value_to_local_cpp_value(interface,
context['has_type_checking_interface'],
argument, arg_index, auto_scope),
})
return context
################################################################################
# Value handling
################################################################################
def cpp_value(interface, method, number_of_arguments):
def cpp_argument(argument):
argument_name = dart_types.check_reserved_name(argument.name)
idl_type = argument.idl_type
if idl_type.is_typed_array_type:
return '%s.get()' % argument_name
# TODO(eseidel): This should check cpp_type.endswith('Handle')
if idl_type.name == 'MojoDataPipeConsumer':
return '%s.Pass()' % argument_name
if idl_type.is_callback_interface:
return '%s.release()' % argument_name
return argument_name
# Truncate omitted optional arguments
arguments = method.arguments[:number_of_arguments]
if method.is_constructor:
call_with_values = interface.extended_attributes.get('ConstructorCallWith')
else:
call_with_values = method.extended_attributes.get('CallWith')
cpp_arguments = DartUtilities.call_with_arguments(call_with_values)
if ('PartialInterfaceImplementedAs' in method.extended_attributes and not method.is_static):
cpp_arguments.append('*receiver')
cpp_arguments.extend(cpp_argument(argument) for argument in arguments)
this_union_arguments = method.idl_type and method.idl_type.union_arguments
if this_union_arguments:
cpp_arguments.extend([member_argument['cpp_value']
for member_argument in this_union_arguments])
if ('RaisesException' in method.extended_attributes or
(method.is_constructor and
DartUtilities.has_extended_attribute_value(interface, 'RaisesException', 'Constructor'))):
cpp_arguments.append('es')
if method.name == 'Constructor':
base_name = 'create'
elif method.name == 'NamedConstructor':
base_name = 'createForJSConstructor'
else:
base_name = DartUtilities.cpp_name(method)
cpp_method_name = DartUtilities.scoped_name(interface, method, base_name)
return '%s(%s)' % (cpp_method_name, ', '.join(cpp_arguments))
def dart_set_return_value(interface_name, method, cpp_value, for_main_world=False):
idl_type = method.idl_type
extended_attributes = method.extended_attributes
if not idl_type or idl_type.name == 'void':
# Constructors and void methods don't have a return type
return None
release = False
if idl_type.is_union_type:
release = idl_type.release
# [CallWith=ScriptState], [RaisesException]
# TODO(terry): Disable ScriptState temporarily need to handle.
# if (has_extended_attribute_value(method, 'CallWith', 'ScriptState') or
# 'RaisesException' in extended_attributes or
# idl_type.is_union_type):
# cpp_value = 'result' # use local variable for value
# release = idl_type.release
auto_scope = not 'DartNoAutoScope' in extended_attributes
script_wrappable = 'impl' if inherits_interface(interface_name, 'Node') else ''
return idl_type.dart_set_return_value(cpp_value, extended_attributes,
script_wrappable=script_wrappable,
release=release,
for_main_world=for_main_world,
auto_scope=auto_scope)
def dart_value_to_local_cpp_value(interface, has_type_checking_interface,
argument, index, auto_scope=True):
extended_attributes = argument.extended_attributes
idl_type = argument.idl_type
name = argument.name
# TODO(ianh): why don't we need to null-check everything?
# https://github.com/domokit/mojo/issues/280
null_check = ((argument.is_optional and idl_type.is_callback_interface) or
(argument.default_value and argument.default_value.is_null))
return idl_type.dart_value_to_local_cpp_value(
extended_attributes, name, null_check, has_type_checking_interface,
index=index, auto_scope=auto_scope)
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