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LibJS+LibWeb: Add JS::Object::inherits(class_name)

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To allow implementing the DOM class hierarchy in JS bindings, this
patch adds an inherits() function that can be used to ask an Object
if it inherits from a specific C++ class (by name).

The necessary overrides are baked into each Object subclass by the
new JS_OBJECT macro, which works similarly to C_OBJECT in LibCore.

Thanks to @Dexesttp for suggesting this approach. :^)
This commit is contained in:
Andreas Kling 2020-06-21 15:14:02 +02:00
parent 1914f52371
commit af51dc105a
57 changed files with 122 additions and 106 deletions
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10
Libraries/LibWeb/Bindings/Wrapper.h
View file

@ -37,20 +37,14 @@ namespace Bindings {
class Wrapper
: public JS::Object
, public Weakable<Wrapper> {
public:
virtual bool is_event_target_wrapper() const { return false; }
virtual bool is_node_wrapper() const { return false; }
virtual bool is_document_wrapper() const { return false; }
virtual bool is_element_wrapper() const { return false; }
virtual bool is_htmlelement_wrapper() const { return false; }
JS_OBJECT(Wrapper, JS::Object);
public:
protected:
explicit Wrapper(Object& prototype)
: Object(&prototype)
{
}
virtual bool is_web_wrapper() const final { return true; }
};
}