Sync 'naturalWidth' and 'naturalHeight' with Spec and change from 'in…

…t' to 'unsigned'

https://bugs.webkit.org/show_bug.cgi?id=253364
rdar://problem/106580337

Reviewed by Ryosuke Niwa.

This patch aligns WebKit with Web-Spec [1] by changing 'naturalWidth'
and 'naturalHeight' from 'int' to 'unsigned'.

[1] https://html.spec.whatwg.org/#the-img-element

* Source/WebCore/html/HTMLImageElement.cpp:
(HTMLImageElement::naturalWidth): Change to 'unsigned' and return to have 'toUnsigned'
(HTMLImageElement::naturalHeight): Ditto
* Source/WebCore/html/HTMLImageElement.h: Update definition to 'unsigned' from 'int' for 'naturalWidth' and 'naturalHeight'
* Source/WebCore/html/HTMLImageElement.idl: Update 'naturalWidth' and 'naturalHeight' to have 'unsigned'

Canonical link: https://commits.webkit.org/266302@main

Source/WebCore/html/HTMLImageElement.cpp

@@ -596,20 +596,20 @@ float HTMLImageElement::effectiveImageDevicePixelRatio() const
     return m_imageDevicePixelRatio;
 }
 
-int HTMLImageElement::naturalWidth() const
+unsigned HTMLImageElement::naturalWidth() const
 {
     if (!m_imageLoader->image())
         return 0;
 
-    return m_imageLoader->image()->unclampedImageSizeForRenderer(renderer(), effectiveImageDevicePixelRatio()).width();
+    return m_imageLoader->image()->unclampedImageSizeForRenderer(renderer(), effectiveImageDevicePixelRatio()).width().toUnsigned();
 }
 
-int HTMLImageElement::naturalHeight() const
+unsigned HTMLImageElement::naturalHeight() const
 {
     if (!m_imageLoader->image())
         return 0;
 
-    return m_imageLoader->image()->unclampedImageSizeForRenderer(renderer(), effectiveImageDevicePixelRatio()).height();
+    return m_imageLoader->image()->unclampedImageSizeForRenderer(renderer(), effectiveImageDevicePixelRatio()).height().toUnsigned();
 }
 
 bool HTMLImageElement::isURLAttribute(const Attribute& attribute) const

Source/WebCore/html/HTMLImageElement.h

@@ -64,8 +64,8 @@ class HTMLImageElement : public HTMLElement, public FormAssociatedElement, publi
     WEBCORE_EXPORT unsigned width();
     WEBCORE_EXPORT unsigned height();
 
-    WEBCORE_EXPORT int naturalWidth() const;
-    WEBCORE_EXPORT int naturalHeight() const;
+    WEBCORE_EXPORT unsigned naturalWidth() const;
+    WEBCORE_EXPORT unsigned naturalHeight() const;
     const URL& currentURL() const { return m_currentURL; }
     const AtomString& currentSrc() const { return m_currentSrc; }
 

Source/WebCore/html/HTMLImageElement.idl

@@ -36,8 +36,8 @@
     [CEReactions=NotNeeded, Reflect] attribute boolean isMap;
     [CEReactions=NotNeeded] attribute unsigned long width;
     [CEReactions=NotNeeded] attribute unsigned long height;
-    readonly attribute long naturalHeight;
-    readonly attribute long naturalWidth;
+    readonly attribute unsigned long naturalHeight;
+    readonly attribute unsigned long naturalWidth;
     readonly attribute boolean complete;
     readonly attribute USVString currentSrc;
     [CEReactions=NotNeeded, EnabledBySetting=ReferrerPolicyAttributeEnabled, ImplementedAs=referrerPolicyForBindings] attribute [AtomString] DOMString referrerPolicy;