[abandoned] IDL attribute "SetHiddenValueTo" to build strong refs to wrapped object's dependen…

Source/bindings/scripts/deprecated_code_generator_v8.pm

 # Copyright (C) 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
 # Copyright (C) 2006 Anders Carlsson <andersca@mac.com>
 # Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
 # Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org>
 # Copyright (C) 2006 Apple Computer, Inc.
 # Copyright (C) 2007, 2008, 2009, 2012 Google Inc.
 # Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
 # Copyright (C) Research In Motion Limited 2010. All rights reserved.
 # Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 # Copyright (C) 2012 Ericsson AB. All rights reserved.
@@ skipping 801 matching lines @@
 
     $header{nameSpaceWebCore}->add(<<END);
 
 template<>
 class WrapperTypeTraits<${nativeType} > {
 public:
     static WrapperTypeInfo* info() { return &${v8ClassName}::info; }
 };
 END
 
-    my $customWrap = $interface->extendedAttributes->{"CustomToV8"};
+    my $setHiddenValue = $interface->extendedAttributes->{"SetHiddenValueTo"};
+    my $customWrap = $interface->extendedAttributes->{"CustomToV8"} || $setHiddenValue;
     if ($noToV8) {
         die "Can't suppress toV8 for subclass\n" if $interface->parent;
     } elsif ($noWrap) {
         die "Must have custom toV8\n" if !$customWrap;
         $header{nameSpaceWebCore}->add(<<END);
 class ${nativeType};
 v8::Handle<v8::Value> toV8(${nativeType}*, v8::Handle<v8::Object> creationContext, v8::Isolate*);
 
 template<class CallbackInfo>
 inline void v8SetReturnValue(const CallbackInfo& callbackInfo, ${nativeType}* impl, v8::Handle<v8::Object> creationContext)
@@ skipping 3162 matching lines @@
     ASSERT(impl);
     v8::Handle<v8::Object> wrapper = ${v8ClassName}::createWrapper(impl, creationContext, isolate);
     if (!wrapper.IsEmpty())
         wrapper->SetIndexedPropertiesToExternalArrayData(impl->baseAddress(), $arrayType, impl->length());
     return wrapper;
 }
 
 END
     }
 
+    my $setHiddenValue = $interface->extendedAttributes->{"SetHiddenValueTo"};
+    if ($setHiddenValue) {
+        my @hiddenValues = split /\s*\|\s*/, $setHiddenValue;
+

[kouhei (in TOK), 2013/09/10 01:30:34]

I think we need to addIncludesForType(<$setHiddenValue return type>) here.
However, I don't know how I can do that...

[Nils Barth (inactive), 2013/09/10 01:50:55]

Discussed offline; issue is that required include cannot be determined from the
SetHiddenValueTo extended attribute itself or the IDL file: it might be some
not-obviously-related C++ class.

Most generic solution is probably to add an 'AdditionalIncludes' extended
attribute to handle these.

haraken: other ideas?

+        $implementation{nameSpaceWebCore}->add(<<END);
+v8::Handle<v8::Object> wrap($implClassName* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
+{
+    ASSERT(impl);
+    v8::Handle<v8::Object> wrapper = ${v8ClassName}::createWrapper(impl, creationContext, isolate);
+END
+        foreach my $hiddenValue (@hiddenValues) {
+            $implementation{nameSpaceWebCore}->add(<<END);
+    if (impl->$hiddenValue())
+        V8HiddenPropertyName::setNamedHiddenReference(wrapper, "$hiddenValue", toV8(impl->$hiddenValue(), creationContext, isolate));
+END
+        }
+
+        $implementation{nameSpaceWebCore}->add(<<END);
+    return wrapper;
+}
+
+END
+    }
+
     my @enabledPerContextFunctions;
     my @normalFunctions;
     my $needsDomainSafeFunctionSetter = 0;
     # Generate methods for functions.
     foreach my $function (@{$interface->functions}) {
         next if $function->name eq "";
         GenerateFunction($function, $interface, "");
         if ($function->extendedAttributes->{"PerWorldBindings"}) {
             GenerateFunction($function, $interface, "ForMainWorld");
         }
@@ skipping 2000 matching lines @@
         if ($currentInterface->extendedAttributes->{$extendedAttribute}) {
             $found = 1;
         }
         return 1 if $found;
     }, 0);
 
     return $found;
 }
 
 1;