W3C home > Mailing lists > Public > public-html@w3.org > January 2010

Re: Canvas Accessibility Next steps

From: Maciej Stachowiak <mjs@apple.com>
Date: Sun, 24 Jan 2010 18:28:30 -0800
Cc: Ian Hickson <ian@hixie.ch>, James Craig <jcraig@apple.com>, public-canvas-api@w3.org, HTML WG <public-html@w3.org>
Message-id: <03EF0E70-7679-48D9-8C52-5BC30EE84F08@apple.com>
To: Richard Schwerdtfeger <schwer@us.ibm.com>

On Jan 24, 2010, at 2:44 PM, Richard Schwerdtfeger wrote:

> Hi Maciej,
> 
> I understand. I have two concerns with this approach:
> 
> 1. id names are not reserved. Potentially, and although remote, an author could randomly have chosen those id's. We want to have reserved CSS Properties that may applied to any web page.
> 
That's true for the id names. But it's not true for the media type names. What the user would choose via accessibility preferences and choice of assistive technologies is what media type they are browsing with. The id names are not exposed to the user, they are just a mechanism to bind to media-type-specific rules. I could just as well have chosen class names or any other styling hook that CSS has available. 

> 2. Authors may wish to choose a src file to be rendered. Companies are providing public APIs out there to provide reusable content such as a Google Map and with a small parameter change the driving directions. We should allow authors to provide entire remote fragments as alternatives to canvas to pul into a web page. 
> 

Authors could do that with an <a> element to link to the alternate version, or an <iframe> to embed it, or even a script to redirect automatically. These options could either be placed in an element that has an associated media query (either inside or outside the <canvas>), or just presented to all users (either outside the canvas so everyone gets the visual rendering, or just inside so everyone gets an associated model object).

> 
> Here are three versions of the driving directions:
> 
> http://maps.google.com/maps?f=d&output=html&hl=en&q=3832+royal+troon+drive+Round+Rock%2C+78664+to+11501+burnet+road+austin+78758&dirmode=walking&ie=UTF8&dirflg=w
> 
> http://maps.google.com/maps?f=d&output=map&hl=en&q=3832+royal+troon+drive+Round+Rock%2C+78664+to+11501+burnet+road+austin+78758&dirmode=walking&ie=UTF8&dirflg=w
> 
> http://maps.google.com/maps?f=d&output=kml&hl=en&q=3832+royal+troon+drive+Round+Rock%2C+78664+to+11501+burnet+road+austin+78758&dirmode=walking&ie=UTF8&dirflg=w
> 
> 

What is Google's current UI to let users choose between these? (I honestly don't know.)

Regards,
Maciej
Received on Monday, 25 January 2010 02:29:05 UTC

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