RE: Proposal: Regions with auto-extent

Thank you for your interest in XSL.

The XSL FO SG notes that this enhancement request 
is outside the scope of the XSL 1.1 spec.

The plan is for a future XSL version to have a more complex 
page master FO that should address these and other issues.

Paul Grosso
for the XSL FO SG 


________________________________

	From: [email protected]
[mailto:[email protected]] On Behalf Of Alexander I Rozhenko
	Sent: Saturday, 2005 September 10 5:16
	To: [email protected]
	Subject: Proposal: Regions with auto-extent
	
	
	Hello Editiors,
	 
	This is another proposal that allows automatically adjust a body
region if static-content regions overlap it. This issue is concerned
with adjustment aka MS Word.
	 
	In MS Word, the extent of headers and footers is not specified.
When a header/footer goes over the text area, the top/bottom margin of
the text area is adjusted to avoid overlapping. Many users of RTF2FO
want a similar behavior for FO renderers. I thing this behavior can be
specified as follows:
	 
	1 Allow extent="auto" in description of static regions in the
simple-page-master. This value means the extent of the region to be
calculated when a static-content of the region is prepared. More
precisely, the block-progression direction in such region should be
parallel with the extent direction. When auto-extent is calculated, only
the areas of the xsl-normal class are taken into account.
	 
	2 In region-body, additional properties are required. One
property is neccessary to allow or disallow adjustment of region margins
if auto-extending regions overlap it. Other properties should specify
the minimal distance between auto-extending regions and the region-body.
This is how I see it:
	 
	"region-adjust"
	Value: none | auto
	Initial: none
	Inherited: no
	Percentages: allows adjust "region-body" margins to avoid
overlapping with auto-extending regions.
	Media:  visual 
	
	"region-distance-before"
	Value:  <width> | inherit 
	Initial:  0pt
	Inherited:  no 
	Percentages: Specifies a minimal distance between region-body
and auto-extending region-before 
	Media:  visual 
	
		"region-distance-after"
	...
		 
		"region-distance-start"
	...
	 
		"region-distance-end"
	...
		 
		"region-distance"
	This is a shorthand for all four distances
	 
	How should they work?
	 
	If "region-adjust" has the "auto" value, the region-body margins
can be adjusted. The decision to adjust a margin is made in the
following case: if static content of a neighbor region is
auto-extendable, has a positive extent, and the distance between it and
the region-body area is less than it is specified in the corresponding
"region-distance-..." property. Then the corresponding margin is
adjusted to provide the required region-distance.
	 
	Sincerely,
	Alexander I Rozhenko