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RE: [css3-images] Making gradients readable

From: Brian Manthos <brianman@microsoft.com>
Date: Mon, 31 Oct 2011 06:19:32 +0000
To: fantasai <fantasai.lists@inkedblade.net>, "www-style@w3.org" <www-style@w3.org>
Message-ID: <9710FCC2E88860489239BE0308AC5D17044029EF@TK5EX14MBXC264.redmond.corp.microsoft.com>
>    linear-gradient( [ <angle> | from <side-or-corner> ]
>                     as <color-stop> [, <color-stop>]+ )

IMO, that's an arbitrary change that has negative value.


The existing syntax for linear-gradient is of the form...
	linear-gradient( <direction>, <color-stop>[, <color-stop>]+ )

The existing syntax for radial-gradient is of the form...
	radial-gradient( <position>, <sizeOrShape>, <color-stop>[, <color-stop>]+ )

There were two concerns I saw supported in the IRC log:
1. position is required for explicit sizing; that priority is backwards
2. with either ordereing of position and sizeOrShape, some syntactic sugar in the form of a keyword would help readability

As such, that pushes us toward...

	radial-gradient(<sizeOrShape> [with <position>]?, <color-stop>[, <color-stop>]+ )

Note that you can then rewrite them as...

<linear-gradient> = linear-gradient(<linear-params>, <color-stop>[, <color-stop>]+)
<radial-gradient> = radial-gradient(<radial-params>, <color-stop>[, <color-stop>]+)

<linear-params> = [ <angle> | from <side-or-corner> ]
<radial-params> = (<sizeOrShape> [with <position>]?


Notice the consistency between the two.


Replacing the comma before the first <color-stop> is graituitous, doesn't advance the cause of readability, and makes the syntax longer and parser (slightly) more complicated.

I don't see the win, but I see a negative in reopening the <linear-gradient> grammar without having a REALLY good reason.  Reopening that debate is a waste of everyone's time, and moves the timeline for the spec and implementations later into the future.

	
Received on Monday, 31 October 2011 06:20:32 GMT

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