Add a new bindings2/scripts directory for Dart bindings

sky/engine/bindings2/scripts/dart_utilities.py

Index: sky/engine/bindings2/scripts/dart_utilities.py
diff --git a/sky/engine/bindings2/scripts/dart_utilities.py b/sky/engine/bindings2/scripts/dart_utilities.py
new file mode 100644
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+++ b/sky/engine/bindings2/scripts/dart_utilities.py
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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.
+
+"""Functions shared by various parts of the code generator.
+
+Extends IdlType and IdlUnion type with |enum_validation_expression| property.
+
+Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
+"""
+
+
+################################################################################
+# Utility function exposed for Dart CodeGenerator. Only 6 methods are special
+# to Dart the rest delegate to the v8_utilities functions.
+################################################################################
+
+
+import v8_types  # Required
+import v8_utilities
+
+
+def _scoped_name(interface, definition, base_name):
+    # partial interfaces are implemented as separate classes, with their members
+    # implemented as static member functions
+    partial_interface_implemented_as = definition.extended_attributes.get('PartialInterfaceImplementedAs')
+    if partial_interface_implemented_as:
+        return '%s::%s' % (partial_interface_implemented_as, base_name)
+    if (definition.is_static or
+        definition.name in ('Constructor', 'NamedConstructor')):
+        return '%s::%s' % (v8_utilities.cpp_name(interface), base_name)
+    return 'receiver->%s' % base_name
+
+
+def _bool_to_cpp(tf):
+    return "true" if tf else "false"
+
+
+# [CallWith]
+_CALL_WITH_ARGUMENTS = {
+    'ScriptState': 'state',
+    'ExecutionContext': 'context',
+    'ScriptArguments': 'scriptArguments.release()',
+    'ActiveWindow': 'DOMDartState::CurrentWindow()',
+    'FirstWindow': 'DOMDartState::CurrentWindow()',
+    'Document': 'document',
+}
+
+# List because key order matters, as we want arguments in deterministic order
+_CALL_WITH_VALUES = [
+    'ScriptState',
+    'ExecutionContext',
+    'ScriptArguments',
+    'ActiveWindow',
+    'FirstWindow',
+    'Document',
+]
+
+
+def _call_with_arguments(call_with_values):
+    if not call_with_values:
+        return []
+    return [_CALL_WITH_ARGUMENTS[value]
+            for value in _CALL_WITH_VALUES
+            if v8_utilities.extended_attribute_value_contains(call_with_values, value)]
+
+
+def _generate_native_entry(interface_name, name, kind, is_static, arity):
+
+    if kind == 'Getter':
+        suffix = "_Getter"
+    elif kind == 'Setter':
+        suffix = "_Setter"
+    elif kind == 'Constructor':
+        name = "constructor"
+        suffix = "Callback"
+    elif kind == 'Method':
+        suffix = "_Callback"
+
+    tag = "%s%s" % (name, suffix)
+    native_entry = "_".join([interface_name, tag])
+
+    argument_names = ['__arg_%d' % i for i in range(0, arity)]
+
+    return {'blink_entry': name,
+            'argument_names': argument_names,
+            'resolver_string': native_entry}
+
+################################################################################
+# This is the monkey patched methods most delegate to v8_utilities but some are
+# overridden in dart_utilities.
+################################################################################
+
+
+class dart_utilities_monkey():
+    def __init__(self):
+        self.base_class_name = 'dart_utilities'
+
+DartUtilities = dart_utilities_monkey()
+
+DartUtilities.bool_to_cpp = _bool_to_cpp
+DartUtilities.call_with_arguments = _call_with_arguments
+DartUtilities.capitalize = v8_utilities.capitalize
+DartUtilities.cpp_name = v8_utilities.cpp_name
+DartUtilities.extended_attribute_value_contains = v8_utilities.extended_attribute_value_contains
+DartUtilities.generate_native_entry = _generate_native_entry
+DartUtilities.has_extended_attribute = v8_utilities.has_extended_attribute
+DartUtilities.has_extended_attribute_value = v8_utilities.has_extended_attribute_value
+DartUtilities.scoped_name = _scoped_name
+DartUtilities.strip_suffix = v8_utilities.strip_suffix
+DartUtilities.uncapitalize = v8_utilities.uncapitalize