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Re: [css-masking] 'mask: none' clear all masking operations

From: Dirk Schulze <dschulze@adobe.com>
Date: Tue, 25 Jun 2013 18:07:31 -0700
To: fantasai <fantasai.lists@inkedblade.net>
CC: "www-style@w3.org" <www-style@w3.org>, w3c-css-wg <w3c-css-wg@w3.org>
Message-ID: <5F46BD16-5CF0-4502-843E-5B51A4CFD2B6@adobe.com>

On Jun 25, 2013, at 4:33 PM, fantasai <fantasai.lists@inkedblade.net> wrote:

> On 06/25/2013 04:20 PM, Dirk Schulze wrote:
>> If fantasai is on the call tomorrow, I would like to discuss mask/mask-box-image
>> shorthand and if/how it is possible to reset all masking operations with mask: none.
> 
> You make a shorthand tree like this:
> 
>   mask
>    +-- mask-layers
>    |    +--mask-layer-image
>    |    +--mask-layer-position
>    |    +--mask-layer-repeat
>    |    etc.
>    +-- mask-box
>         +--mask-box-source
>         +--mask-box-slice
>         +--mask-box-repeat
>         etc.

Right, I did not meant to question that it is possible. If we follow this proposal, I would suggest:
- 'mask' shorthand can just reference an SVG Mask or disable masking entirely. 'mask-layer' and 'mask-box' can just reference CSS Images.
This would solve the SVG resource or CSS Image detection problem in a different way for masking.

However, an uber-shorthand also has some drawbacks. It will be significant more difficult to understand how masking works. The author needs to know that 'mask' is a shorthand, which can not do everything that the longhand properties can do. (To be honest, I never thought about border as a shorthand for other shorthands but with limited control before you mentioned it.) The implementation and maintenance cost might increase as well.

Greetings,
Dirk


> 
> Rename as appropriate.
> 
> Note: This is similar to how 'border' works.
> 
>   border
>     +--border-various-things-that-draw-borders
>     |    +--border-left-style
>     |    etc.
>     +--border-image
>          +--border-image-source
>          etc.
> 
> ~fantasai
> 
> 
Received on Wednesday, 26 June 2013 01:08:02 UTC

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