Rename sky/engine/bindings2 to sky/engine/bindings

sky/engine/bindings2/scripts/dart_callback_interface.py

-# 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 a callback interface.
-
-Extends IdlType with property |callback_cpp_type|.
-
-Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
-"""
-
-from idl_types import IdlType, IdlTypeBase
-import dart_types
-from dart_utilities import DartUtilities
-from v8_globals import includes
-
-CALLBACK_INTERFACE_H_INCLUDES = frozenset([
-    'bindings2/dart_callback.h',
-])
-
-CALLBACK_INTERFACE_CPP_INCLUDES = frozenset([
-    'wtf/GetPtr.h',
-    'wtf/RefPtr.h',
-])
-
-def cpp_type(idl_type):
-    # FIXME: remove this function by making callback types consistent
-    # (always use usual v8_types.cpp_type)
-    idl_type_name = idl_type.name
-    if idl_type_name == 'String':
-        return 'const String&'
-    if idl_type_name == 'void':
-        return 'void'
-    # Callbacks use raw pointers, so raw_type=True
-    usual_cpp_type = idl_type.cpp_type_args(raw_type=True)
-    if usual_cpp_type.startswith(('Vector', 'HeapVector', 'WillBeHeapVector')):
-        return 'const %s&' % usual_cpp_type
-    return usual_cpp_type
-
-IdlTypeBase.callback_cpp_type = property(cpp_type)
-
-
-def generate_callback_interface(callback_interface):
-    includes.clear()
-    includes.update(CALLBACK_INTERFACE_CPP_INCLUDES)
-    name = callback_interface.name
-
-    methods = [generate_method(operation)
-               for operation in callback_interface.operations]
-    template_contents = {
-        'cpp_class': name,
-        'dart_class': dart_types.dart_type(callback_interface.name),
-        'header_includes': set(CALLBACK_INTERFACE_H_INCLUDES),
-        'methods': methods,
-    }
-    return template_contents
-
-
-def add_includes_for_operation(operation):
-    operation.idl_type.add_includes_for_type()
-    for argument in operation.arguments:
-        argument.idl_type.add_includes_for_type()
-
-
-def generate_method(operation):
-    extended_attributes = operation.extended_attributes
-    idl_type = operation.idl_type
-    idl_type_str = str(idl_type)
-    if idl_type_str not in ['boolean', 'void']:
-        raise Exception('We only support callbacks that return boolean or void values.')
-    is_custom = 'Custom' in extended_attributes
-    if not is_custom:
-        add_includes_for_operation(operation)
-    call_with = extended_attributes.get('CallWith')
-    call_with_this_handle = DartUtilities.extended_attribute_value_contains(call_with, 'ThisValue')
-    contents = {
-        'call_with_this_handle': call_with_this_handle,
-        'cpp_type': idl_type.callback_cpp_type,
-        'custom': is_custom,
-        'idl_type': idl_type_str,
-        'name': operation.name,
-    }
-    contents.update(generate_arguments_contents(operation.arguments, call_with_this_handle))
-    return contents
-
-
-def generate_arguments_contents(arguments, call_with_this_handle):
-    def generate_argument(argument):
-        creation_context = ''
-        if argument.idl_type.native_array_element_type is not None:
-            creation_context = '<Dart%s>' % argument.idl_type.native_array_element_type
-        return {
-            'handle': '%sHandle' % argument.name,
-            'cpp_value_to_dart_value': argument.idl_type.cpp_value_to_dart_value(argument.name,
-                                                                                 creation_context=creation_context),
-        }
-
-    argument_declarations = [
-            '%s %s' % (argument.idl_type.callback_cpp_type, argument.name)
-            for argument in arguments]
-    if call_with_this_handle:
-        argument_declarations.insert(0, 'ScriptValue thisValue')
-    return  {
-        'argument_declarations': argument_declarations,
-        'arguments': [generate_argument(argument) for argument in arguments],
-    }