- From: Alan Gresley <alan@css-class.com>
- Date: Sat, 09 Apr 2011 06:57:24 +1000
- To: Sylvain Galineau <sylvaing@microsoft.com>
- CC: "Tab Atkins Jr." <jackalmage@gmail.com>, Anton Prowse <prowse@moonhenge.net>, "www-style@w3.org" <www-style@w3.org>, Jack Smiley <zxcv_890@hotmail.com>
On 9/04/2011 6:22 AM, Sylvain Galineau wrote:
> [Tab Atkins:]
>>>> That was rather careless. How about: ...if it had position:static
>>>> and non-auto margin-left, in ltr mode; and in rtl mode it's the
>>>> top-right corners and margin-right that we consider.
>>>>
>>>>> This should probably be made a little clearer in the spec.
>>>>
>>> I'm interested in understanding why the canvas origin needs to be
>>> defined to change with direction. What properties depend on this switch
>> ?
>>
>> If the ICB is wider than the viewport, the excess has to overflow the
>> viewport in one direction or another. You want it to overflow to the
>> right in ltr, and to the left in rtl.
>
> Check. It's the overflow origin, really. Thanks.
Yes, one direction of overflow is hidden, the other direction is visible.
For LTR we have this.
|
hidden | hidden-y
|
----------X----------------------|-------------
| |
hidden-x | visible / viewport | overflow-x
| |
|----------------------|-------------
| |
| overflow-y | overflow
| |
For RTL we have this.
|
hidden-y | hidden
|
-------------|----------------------X----------
| |
overflow-x | visible / viewport | hidden-x
| |
-------------|----------------------|
| |
overflow | overflow-y |
| |
By adjusting the viewport height or width, we can either causes more
overflow or less overflow (even no overflow).
--
Alan http://css-class.com/
Armies Cannot Stop An Idea Whose Time Has Come. - Victor Hugo
Received on Friday, 8 April 2011 20:57:52 UTC