1 files changed, 134 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/bindings/scripts/v8_callback_interface.py b/chromium/third_party/WebKit/Source/bindings/scripts/v8_callback_interface.py
new file mode 100644
index 00000000000..06c18f2b809
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/bindings/scripts/v8_callback_interface.py
@@ -0,0 +1,134 @@
+# 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
+from v8_globals import includes
+import v8_types
+import v8_utilities
+
+CALLBACK_INTERFACE_H_INCLUDES = frozenset([
+    'bindings/v8/ActiveDOMCallback.h',
+    'bindings/v8/DOMWrapperWorld.h',
+    'bindings/v8/ScopedPersistent.h',
+])
+CALLBACK_INTERFACE_CPP_INCLUDES = frozenset([
+    'bindings/v8/V8Binding.h',
+    'bindings/v8/V8Callback.h',
+    'core/dom/ExecutionContext.h',
+    'wtf/Assertions.h',
+    '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 used_as_argument=True
+    usual_cpp_type = idl_type.cpp_type_args(used_as_argument=True)
+    if usual_cpp_type.startswith(('Vector', 'HeapVector', 'WillBeHeapVector')):
+        return 'const %s&' % usual_cpp_type
+    return usual_cpp_type
+
+IdlType.callback_cpp_type = property(cpp_type)
+
+
+def generate_callback_interface(callback_interface):
+    includes.clear()
+    includes.update(CALLBACK_INTERFACE_CPP_INCLUDES)
+    return {
+        'conditional_string': v8_utilities.conditional_string(callback_interface),
+        'cpp_class': callback_interface.name,
+        'v8_class': v8_utilities.v8_class_name(callback_interface),
+        'header_includes': set(CALLBACK_INTERFACE_H_INCLUDES),
+        'methods': [generate_method(operation)
+                    for operation in callback_interface.operations],
+    }
+
+
+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 = v8_utilities.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):
+        return {
+            'handle': '%sHandle' % argument.name,
+            # FIXME: setting creation_context=v8::Handle<v8::Object>() is
+            # wrong, as toV8 then implicitly uses the current context, which
+            # causes leaks between isolated worlds if a different context is
+            # used.
+            'cpp_value_to_v8_value': argument.idl_type.cpp_value_to_v8_value(
+                argument.name, isolate='isolate',
+                creation_context='m_scriptState->context()->Global()'),
+        }
+
+    argument_declarations = ['ScriptValue thisValue'] if call_with_this_handle else []
+    argument_declarations.extend(
+        '%s %s' % (argument.idl_type.callback_cpp_type, argument.name)
+        for argument in arguments)
+    return  {
+        'argument_declarations': argument_declarations,
+        'arguments': [generate_argument(argument) for argument in arguments],
+    }