[Webkit-unassigned] [Bug 48578] HTML5 Conformance Test failure: approved/canvas/canvas_text_font_001.htm

Sat May 21 08:42:21 PDT 2011

https://bugs.webkit.org/show_bug.cgi?id=48578

mustaf.here at gmail.com changed:

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                 CC|                            |mustaf.here at gmail.com

--- Comment #1 from mustaf.here at gmail.com  2011-05-21 08:42:21 PST ---
Investigated the issue on r86221, please find the analysis below. Need some help to proceed further on this.

Test-case passes in FF but NOT working in Safari(5.0.3)/Winlauncher setup [r86221])

After going through the HTML5 Canvas spec (http://www.w3.org/TR/2dcontext/#dom-context-2d-font), my understanding is that if any of inherit/initial/default are used in the font property assignment statement (e.g., "20px inherit" OR "inherit 20px"), then it must ignore the font value assignment & continue with the previous font value assigned. This is in contrast to the CSS2.1 specification which allows the usage of "inherit" (The values initial/default are reserved for future use).
Is this understanding correct?

After debugging CSSParser & CSSGrammer.y I have found that:
=> for normal HTML/CSS the code flows through CSSParser::parseSheet() => cssyyparse() => CSSParser::parseValue()
=> for HTML5 Canvas, the code flows through CSSParser::parseDeclaration() => cssyyparse() => CSSParser::parseValue()
In the CSSParser::parseValue(), the handling is same for normal HTML/CSS as well as for HTML5 Canvas, i.e., it is handling the "inherit" in the same way.

However, if my understanding as mentioned above is correct, the handling within the parser should be different (reason: CSS2.1 spec & the HTML Canvas 2D Context spec expects "inherit" to be handled differently).

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