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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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3
Libraries/LibWeb/Bindings/CanvasRenderingContext2DWrapper.h
View file

@ -32,6 +32,7 @@ namespace Web {
namespace Bindings {
class CanvasRenderingContext2DWrapper final : public Wrapper {
JS_OBJECT(CanvasRenderingContext2DWrapper, Wrapper);
public:
CanvasRenderingContext2DWrapper(JS::GlobalObject&, CanvasRenderingContext2D&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
@ -41,8 +42,6 @@ public:
const CanvasRenderingContext2D& impl() const { return m_impl; }
private:
virtual const char* class_name() const override { return "CanvasRenderingContext2DWrapper"; }
JS_DECLARE_NATIVE_FUNCTION(fill_rect);
JS_DECLARE_NATIVE_FUNCTION(stroke_rect);
JS_DECLARE_NATIVE_FUNCTION(draw_image);

4
Libraries/LibWeb/Bindings/EventListenerWrapper.h
View file

@ -32,6 +32,8 @@ namespace Web {
namespace Bindings {
class EventListenerWrapper final : public Wrapper {
JS_OBJECT(EventListenerWrapper, Wrapper);
public:
EventListenerWrapper(JS::GlobalObject&, EventListener&);
virtual ~EventListenerWrapper() override;
@ -40,8 +42,6 @@ public:
const EventListener& impl() const { return *m_impl; }
private:
virtual const char* class_name() const override { return "EventListenerWrapper"; }
NonnullRefPtr<EventListener> m_impl;
};

4
Libraries/LibWeb/Bindings/EventWrapper.h
View file

@ -32,6 +32,8 @@ namespace Web {
namespace Bindings {
class EventWrapper : public Wrapper {
JS_OBJECT(EventWrapper, Wrapper);
public:
EventWrapper(JS::GlobalObject&, Event&);
virtual ~EventWrapper() override;
@ -40,8 +42,6 @@ public:
const Event& event() const { return m_event; }
private:
virtual const char* class_name() const override { return "EventWrapper"; }
NonnullRefPtr<Event> m_event;
};

4
Libraries/LibWeb/Bindings/ImageDataWrapper.h
View file

@ -32,6 +32,8 @@ namespace Web {
namespace Bindings {
class ImageDataWrapper : public Wrapper {
JS_OBJECT(ImageDataWrapper, Wrapper);
public:
ImageDataWrapper(JS::GlobalObject&, ImageData&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
@ -41,8 +43,6 @@ public:
const ImageData& impl() const { return m_impl; }
private:
virtual const char* class_name() const override { return "ImageDataWrapper"; }
JS_DECLARE_NATIVE_GETTER(width_getter);
JS_DECLARE_NATIVE_GETTER(height_getter);
JS_DECLARE_NATIVE_GETTER(data_getter);

4
Libraries/LibWeb/Bindings/LocationObject.h
View file

@ -33,14 +33,14 @@ namespace Web {
namespace Bindings {
class LocationObject final : public JS::Object {
JS_OBJECT(LocationObject, JS::Object);
public:
explicit LocationObject(JS::GlobalObject&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
virtual ~LocationObject() override;
private:
virtual const char* class_name() const override { return "LocationObject"; }
JS_DECLARE_NATIVE_FUNCTION(reload);
JS_DECLARE_NATIVE_GETTER(href_getter);

4
Libraries/LibWeb/Bindings/NavigatorObject.h
View file

@ -33,14 +33,14 @@ namespace Web {
namespace Bindings {
class NavigatorObject final : public JS::Object {
JS_OBJECT(NavigatorObject, JS::Object);
public:
NavigatorObject(JS::GlobalObject&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
virtual ~NavigatorObject() override;
private:
virtual const char* class_name() const override { return "NavigatorObject"; }
JS_DECLARE_NATIVE_GETTER(user_agent_getter);
};

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; }
};
}

4
Libraries/LibWeb/Bindings/XMLHttpRequestPrototype.h
View file

@ -32,14 +32,14 @@ namespace Web {
namespace Bindings {
class XMLHttpRequestPrototype final : public JS::Object {
JS_OBJECT(XMLHttpRequestPrototype, JS::Object);
public:
explicit XMLHttpRequestPrototype(JS::GlobalObject&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
virtual ~XMLHttpRequestPrototype() override;
private:
virtual const char* class_name() const override { return "XMLHttpRequestPrototype"; }
JS_DECLARE_NATIVE_FUNCTION(open);
JS_DECLARE_NATIVE_FUNCTION(send);