- From: MURAKAMI Shinyu <murakami@nadita.com>
- Date: Fri, 5 Oct 2001 01:08:06 -0400 (EDT)
- To: pgrosso@arbortext.com, xsl-editors@w3.org
At Wed, 03 Oct 2001 09:49:59 -0400, Paul Grosso wrote: > The XSL FO group discussed this issue in depth. We note that the > results you desire match what is commonly done in HTML browsers. And also done in current versions of XSL-FO formatters - at least: Apache FOP RenderX XEP Antenna House XSL Formatter when white-space-collapse="collapse", unwanted whitespaces beginning and end of line are removed. > > Though we can see the potential usefulness of being able to get > what you want, we decided that it would be too dangerous to try > to make any such changes at this stage in the spec. We have spent > lots of time during development of the spec on whitespaces, spacing > issues, and the area model, and we fear that any such change may have > unexpected results. In general, if the user's document puts white space, > for example, at the beginning of a paragraph, and the XSL-fo stylesheet > doesn't remove them, then that whitespace will get reflected in the output. > (And it is up to the XSL-fo stylesheet to be sure not to introduce new > unwanted whitespace into the FO result tree.) I cannot agree. I don't want so complex XSL-fo stylesheets! > > I note we are changing the initial value for white-space-treatment to > ignore-if-surrounding-linefeed, but I also note that that change > in your example below doesn't change your results. > > So after much debate, we decided not to add a new property value in this > area for XSL 1.0. > > paul > > At 16:28 2001 09 22 -0400, MURAKAMI Shinyu wrote: > >7.15.12 "white-space-collapse" > > > > true > > Specifies, for any character flow object such that: > > - its character is classified as white space in XML, and > > - it is not, however, a U+000A (linefeed) character, and > > - the immediately preceding flow object is a character flow > > object with a character classified as white space in XML > > or the immediately following flow object is a linefeed, > > that flow object shall not generate an area. > > > >I think this definition is not sufficient. > >whitespaces should be discarded also at beginning of line-area and end > >of line-area. > > > >Example: > > > ><fo:block white-space-treatment="preserve" > > linefeed-treatment="treat-as-space" > > white-space-collapse="true"> > > AAA AAA > > <fo:block> > > BBB > > </fo:block> > > CCC > ></fo:block> > > > >These FOs generate three line-areas. > >Before white-space-collapse is processed, these texts are: > > ___AAA___AAA___ > > _____BBB___ > > ___CCC_ > > (here, space is represented as _ ) > > > >In each line-area spaces should be normalized. > >Usually, we expect the following results: > > AAA_AAA > > BBB > > CCC > > (spaces are discarded at beginning and end of line-area) > > > >and not expect: > > _AAA_AAA_ > > _BBB_ > > _CCC_ > > >
Received on Friday, 5 October 2001 10:29:15 UTC