Implement an infrastructure of Blink-in-JS

Source/bindings/scripts/v8_private_script_interface.py

+# 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.
+
+"""Generate template values for V8PrivateScriptInterface.
+
+Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
+"""
+
+from idl_types import IdlType
+from v8_globals import includes
+import v8_types
+import v8_utilities
+
+BLINK_IN_JS_INTERFACE_H_INCLUDES = frozenset([
+    'bindings/v8/V8Binding.h',
+])
+
+BLINK_IN_JS_INTERFACE_CPP_INCLUDES = frozenset([
+    'bindings/core/v8/V8Window.h',
+    'bindings/v8/PrivateScriptController.h',
+    'core/dom/ScriptForbiddenScope.h',
+    'core/frame/LocalFrame.h',
+])
+
+
+def generate_private_script_interface(private_script_interface):
+    includes.clear()
+    includes.update(BLINK_IN_JS_INTERFACE_CPP_INCLUDES)
+    return {
+        'cpp_class': private_script_interface.name,
+        'v8_class': v8_utilities.v8_class_name(private_script_interface),
+        'header_includes': set(BLINK_IN_JS_INTERFACE_H_INCLUDES),
+        'forward_declarations': forward_declarations(private_script_interface),

[Nils Barth (inactive), 2014/06/23 03:14:29]

alpha

+        'methods': [generate_method(operation)
+                    for operation in private_script_interface.operations],
+    }
+
+
+def forward_declarations(private_script_interface):
+    declarations = set(['LocalFrame'])
+    for operation in private_script_interface.operations:
+        if operation.idl_type.is_wrapper_type:
+            declarations.add(operation.idl_type.base_type)
+        for argument in operation.arguments:
+            if argument.idl_type.is_wrapper_type:
+                declarations.add(argument.idl_type.base_type)
+    return sorted(declarations)
+
+
+def generate_method(operation):
+    extended_attributes = operation.extended_attributes
+    idl_type = operation.idl_type
+    idl_type_str = str(idl_type)
+    contents = {
+        'cpp_type': idl_type.cpp_type_args(used_as_primitive_type=True),
+        'name': operation.name,
+        'v8_value_to_cpp_value': v8_types.v8_value_to_cpp_value(
+            idl_type, extended_attributes, 'v8Value', 0, isolate='scriptState->isolate()')

[Nils Barth (inactive), 2014/06/23 03:14:29]

line break?

+            if idl_type.name != 'void' else '',

[Nils Barth (inactive), 2014/06/23 03:14:29]

Could you just add a check to 
v8_types.v8_value_to_cpp_value
to have
if idl_type.name == 'void':
    return ''
?

+    }
+    contents.update(generate_arguments_contents(operation.arguments, idl_type))
+    return contents
+
+
+def generate_arguments_contents(arguments, idl_type):
+    def generate_argument(argument):
+        return {
+            'handle': '%sHandle' % argument.name,
+            'cpp_value_to_v8_value': argument.idl_type.cpp_value_to_v8_value(
+                argument.name, isolate='scriptState->isolate()',
+                creation_context='scriptState->context()->Global()'),
+        }
+
+    argument_declarations = ['LocalFrame* frame']
+    argument_declarations.extend(['%s %s' % (argument.idl_type.cpp_type_args(used_as_argument=True), argument.name)

[Nils Barth (inactive), 2014/06/23 03:14:29]

line break?

+        for argument in arguments])
+    if idl_type.name != 'void':
+        argument_declarations.append('%s* %s' % (idl_type.cpp_type, 'output'))
+    return  {
+        'argument_declarations': argument_declarations,
+        'arguments': [generate_argument(argument) for argument in arguments],
+    }