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Re: comments/questions/suggestions/bug reports for DOM Level 2

From: Garret Wilson <Garret@GlobalMentor.com>
Date: Thu, 25 Nov 1999 17:57:09 -0600
Message-ID: <003801bf37a0$ca2cec60$98c40b26@odysseus>
To: "Philippe Le Hegaret" <plh@w3.org>
Cc: <www-dom@w3.org>
Philippe and others,

----- Original Message -----
From: Philippe Le Hegaret <plh@w3.org>
To: Garret Wilson <Garret@GlobalMentor.com>
Cc: <www-dom@w3.org>
Sent: Thursday, November 25, 1999 10:05 AM
Subject: Re: comments/questions/suggestions/bug reports for DOM Level 2


[cut]
> > * CSSValue has a set of unit types, and CSSPrimitiveValue has another
set of
> > unit types. The former is referred to as "valueType" and the latter as
> > "primitiveType". This is fine, except the "valueType" of CSS_INHERIT
seems
> > in later discussion to get mixed in as a valid value of "primitiveType."
The
> > true value of "primitiveType" when a value is inherited is uncertain,
since
> > CSS_INHERIT is not listed as one of the possibilities. Perhaps a
separate
> > CSS_INHERIT should be defined for "primitiveType," and it should be
listed
> > as an accepted value under CSSPrimitiveValue.primitiveType. Also, how
can
> > "valueType" ever return CSS_INHERIT from this interface, if this
interface
> > is only returned when "valueType" is set to CSS_PRIMITIVE_TYPE? (This is
> > where I miss the type-safe enum in C++ that aren't in Java, BTW, but
that's
> > a different issue.)
>
> I'm not sure I understand your comment. CSSValue.CSS_INHERIT is not mixed
with
> primitiveType and you can't cast the CSSValue instance to
CSSPrimitiveValue.

Since my ramblings above aren't exactly straightforward, let me take it
step-by-step. Please let me know where my assumptions go wrong:

1) Inheritance: The interface CSSPrimitiveValue descends from CSSValue.
1a) This means that every CSSPrimitiveValue has a "valueType" property which
holds one of the constants of CSSValue.
1b) According to the spec, when CSSValue.valueType==CSS_PRIMITIVE_VALUE,
"The value is a CSSPrimitiveValue."
1c) I take this to mean that whenever I have the CSSValue interface with its
"valueType" set to CSS_PRIMITIVE_VALUE, the interface is also a
CSSPrimitiveValue (meaning I can cast the CSSValue to a CSSPrimitiveValue).
Or conversely, CSSPrimitiveValue.valuteType will always equal
CSS_PRIMITIVEVALUE.

2) CSSPrimitiveValue defines a separate property, "primitiveType," which is
distinct from CSSValue.valueType.

3) CSSPrimitiveValue.setStringValue() accepts a stringType parameter.
3a) According to the spec, stringType is "A string code as defined above.
The string code can only be a string unit type (e.g. CSS_URI, CSS_IDENT,
CSS_INHERIT and CSS_ATTR."
3b) Three of those codes (CSS_URI, CSS_IDENT, and CSS_ATTR) are defined
under CSSPrimitiveValue as valid types for CSSPrimitiveType.primitiveType.
The other code (CSS_INHERIT) is defined under CSSValue as a valid type for
CSSValue.valueType.
3c) This seems to me to be mixing CSSValue.CSS_INHERIT with
CSSPrimitiveType.primitiveType.

Perhaps there's something I'm missing here...

> > * CSSStyleDeclaration.cssText does not have a description of parameter
> > cssText in the documentation.
>
>  I checked the latest public version [1] and there is a description for
the
> parameter cssText.

So there is. I don't have a clue to what I was referring to here... :)

Cheers,

Garret Wilson
GlobalMentor, Inc.
garret@globalmentor.com
Received on Thursday, 25 November 1999 18:57:14 GMT

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