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LibWeb: Add PlatformObject::implements_interface(String)
This can be used to ask a PlatformObject if it implements a given IDL interface. It's implemented by a chain of virtual overrides that get inserted for each subclass by the WEB_PLATFORM_OBJECT macro.
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1 changed files with 12 additions and 2 deletions
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@ -13,8 +13,14 @@
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namespace Web::Bindings {
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#define WEB_PLATFORM_OBJECT(class_, base_class) \
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JS_OBJECT(class_, base_class)
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#define WEB_PLATFORM_OBJECT(class_, base_class) \
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JS_OBJECT(class_, base_class) \
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virtual bool implements_interface(String const& interface) const override \
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{ \
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if (interface == #class_) \
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return true; \
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return Base::implements_interface(interface); \
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}
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// https://webidl.spec.whatwg.org/#dfn-platform-object
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class PlatformObject
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@ -30,6 +36,10 @@ public:
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// FIXME: This should return a type that works in both window and worker contexts.
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HTML::Window& global_object() const;
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// https://webidl.spec.whatwg.org/#implements
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// This is implemented by overrides that get generated by the WEB_PLATFORM_OBJECT macro.
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[[nodiscard]] virtual bool implements_interface(String const&) const { return false; }
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protected:
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explicit PlatformObject(JS::Realm&);
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explicit PlatformObject(JS::Object& prototype);
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