Bug 115755 – Devirtualize Document class type checking

• Component: DOM
• Status: RESOLVED FIXED

[Ryosuke Niwa]

Merge
https://chromium.googlesource.com/chromium/blink/+/dae5adc768d5ce6bff301df6515745da8ea24950
Devirtualize Document class type checking

Document has a bunch of virtual bool is*Document() methods on it, but it also has
two bools for XHTML and HTML documents which is silly. We can merge them all
together into an enum of values and devirtualize the type checking methods.

This patch introduces the DocumentClass enum that is used to signal what subclass
of Document, or HTMLDocument, is being implemented.

[Ryosuke Niwa]

Created attachment 200991 [details]
Cleanup

[Benjamin Poulain]

Comment on attachment 200991 [details]
Cleanup

View in context: https://bugs.webkit.org/attachment.cgi?id=200991&action=review

> Source/WebCore/dom/Document.h:1486
> +    unsigned m_documentClasses;

I would just use a uchar8_t here. That way it fits on a word with the 3 boolean bellow.

> Source/WebCore/html/HTMLDocument.h:78
> +    HTMLDocument(Frame*, const KURL&, unsigned documentClasses = HTMLDocumentClass);

I think it should have a default of 0.

Otherwise, an caller may think passing something else override the HTMLDocumentClass. Which is not true because the constructor does the right thing.

[Ryosuke Niwa]

Committed r149705: <http://trac.webkit.org/changeset/149705>