LibWeb: Bring HTMLImageElement closer to spec

Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp

@@ -138,4 +138,28 @@ void HTMLImageElement::set_height(unsigned height)
     set_attribute(HTML::AttributeNames::height, String::number(height));
 }
 
+// https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-naturalwidth
+unsigned HTMLImageElement::natural_width() const
+{
+    // Return the density-corrected intrinsic width of the image, in CSS pixels,
+    // if the image has intrinsic dimensions and is available.
+    if (m_image_loader.has_image())
+        return m_image_loader.width();
+
+    // ...or else 0.
+    return 0;
+}
+
+// https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-naturalheight
+unsigned HTMLImageElement::natural_height() const
+{
+    // Return the density-corrected intrinsic height of the image, in CSS pixels,
+    // if the image has intrinsic dimensions and is available.
+    if (m_image_loader.has_image())
+        return m_image_loader.height();
+
+    // ...or else 0.
+    return 0;
+}
+
 }

Userland/Libraries/LibWeb/HTML/HTMLImageElement.h

@@ -39,6 +39,9 @@ public:
     unsigned height() const;
     void set_height(unsigned);
 
+    unsigned natural_width() const;
+    unsigned natural_height() const;
+
 private:
     virtual void apply_presentational_hints(CSS::StyleProperties&) const override;
 

Userland/Libraries/LibWeb/HTML/HTMLImageElement.idl

@@ -15,5 +15,7 @@ interface HTMLImageElement : HTMLElement {
 
     [CEReactions] attribute unsigned long width;
     [CEReactions] attribute unsigned long height;
+    readonly attribute unsigned long naturalWidth;
+    readonly attribute unsigned long naturalHeight;
 
 };