Hi Stephan, Welcome!
You should subscribe to the fop-dev mailing list if you haven’t already. http://xmlgraphics.apache.org/fop/dev/index.html#mail-fop-dev Any implementation details shall be discussed there. The following page may be helpful to set up your development environment: http://wiki.apache.org/xmlgraphics-fop/FOPIDESetupGuide The first step would be to study the part of the Recommendation about change bars: http://www.w3.org/TR/xsl11/#fo_change-bar-begin http://www.w3.org/TR/xsl11/#fo_change-bar-end Change bars are also mentioned in the description of the fo:page-sequence element: http://www.w3.org/TR/xsl11/#fo_page-sequence Be sure to really understand how and where change bars should be rendered. The Recommendation often proves to more subtle than you may think after a first reading. I’d suggest to gather thoughts on a wiki page on the FOP development area, with illustrations of a few cases (one-column, multiple-column documents, etc.). http://wiki.apache.org/xmlgraphics-fop/DeveloperPages On the implementation side, there are basically 3 steps I think: - validation at the FO tree level (org.apache.fop.fo package and sub-packages) - retrieving the start- and end locations of the bars during layout (org.apache.fop.layoutmgr) - creating the appropriate areas (will probably have to be done in o.a.f.layoutmgr.PageSequenceLayoutManager) That should be enough to get you started. If you have any question, see you on fop-dev! Vincent Jeremias Maerki wrote: > Hi Stephan, > to my knowledge there's noone currently working on that. If you look in > the archives, you'll see that there's precious little discussion about > change bars: > http://fop-dev.markmail.org/search/?q=%22change%20bars%22 > > I haven't looked into change bars, yet, so I can't really offer any > advice right now. Maybe another committer has more. At any rate, any > help improving FOP is highly appreciated. > > On 14.08.2009 08:53:17 Stephan Thesing wrote: >> Hello, >> >> the company I work for will have the need for having change-bars >> in documents for easy difference tracking in our DocBook->FOP->PDF >> toolchain. >> >> Has anybody started to integrated support for the 1.1 >> fo:begin/end-change-bar elements into FOP? >> >> If yes, we would offer to help, if no, we would start that integration >> ourselves. >> >> In any case, pointers or advice would be greatly appreciated. >> >> Best regards.... >> Stephan Thesing > > > > Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org
