I have been working on that, rather slowly, as I do not have much time. My solution for the Knuth Elements is that each inline level LM returns a list of Knuth sequences, inline or block. This part works well.
The code works well for fo:inline with inline or block content. I have not yet implemented it in other LMs except BasicLinkLM. I have done some work for rendering. But I am not very familiar with that part of FOP, and have not yet paid attention to details. I will post a patch on Bugzilla. The present state of the code breaks other inline level LMs as they do not yet return the correct data structure for the next Knuth elements. Therefore I cannot commit it to HEAD. I could commit it into a branch. For the next few weeks I will also spend a lot of time on other things. So, if I am progressing too slowly, someone else should feel free to take this further. Regards, Simon On Wed, Aug 03, 2005 at 08:30:56PM +0200, Jeremias Maerki wrote: > fo:inline, fo:bidi-override and fo:inline-container are all inline-level > FOs and all allow block-level content. Currently, they are not > implemented. See, for example, inline1.xml which fails with a > ClassCastException. The FO I skipped here is fo:wrapper which in the > current implementation doesn't really wrap its content and therefore > avoids an important problem: > > Inline FOs return element lists processed by the line breaker. They > don't have a way to return elements for the page breaker. > > I've been asked to do a time estimate for implementing fo:inline. > fo:inline is particularly important since a lot of people use empty > fo:blocks, for example, to mimic newlines. Now I wonder about how to > implement fo:inline. The only way I came up with was to try normalizing > the FO tree and to let fo:inline be what it currently is: > > Input: > > <fo:block color="blue">blah blah <fo:inline > font-style="italic">blah<fo:block/>blah</fo:inline>blah</fo:block> > > Output: > > <fo:block color="blue">blah blah <fo:inline > font-style="italic">blah</fo:block> > <fo:block color="blue" font-style="italic"/> > <fo:block color="blue" ><fo:inline > font-style="italic">blah</fo:inline>blah</fo:block> > > or: > > <fo:block color="blue"> > <fo:block>blah blah <fo:inline font-style="italic">blah</fo:block> > <fo:block font-style="italic"/> > <fo:block><fo:inline font-style="italic">blah</fo:inline>blah</fo:block> > </fo:block> > > Replicating the properties of an fo:inline to a copy shouldn't be much > of a problem. Replicating the properties for the contained block might > already me a little more difficult because of the whole inheritance > stuff. > > Is there another way? A better way? Any ideas? > > For fo:bidi-override, the same approach would be used. > > For fo:inline-container this whole thing is easier since it generates a > viewport/reference pair, so it will ultimately need its own breaker > (like absolutely positioned block-containers). > > > Jeremias Maerki > -- Simon Pepping home page: http://www.leverkruid.nl
