On Thu, Feb 11, 2016 at 9:23 PM, Carlos Villegas <c...@uniscope.jp> wrote:
> I'm trying to use FOP 2.0 to render Thai language. FOP doesn't really > support Thai script FOP does support Thai, at least glyph composition, though there appears to be a few open issues (FOP-2092 <https://issues.apache.org/jira/browse/FOP-2092>, FOP-2355 <https://issues.apache.org/jira/browse/FOP-2355>). It is also true that FOP is not presently performing line breaking in phrase internal positions ( FOP-2066 <https://issues.apache.org/jira/browse/FOP-2266>), which proposes a solution to employ ICU and use dictionary based LB. > , so I'm using an external program (libthai) to do glyph composition and > word breaking. > Thai doesn't use spaces to separate words, so I was just inserting zero > width spaces to separate words. This works fine. > However, for justified text, these zero width spaces don't stretch, so > nothing happens, I get no justified text. > So, I tried to use fo:character with character set to zero width space, > and setting the letter-spacing.maximum to allow some stretching. > Zero width space (U+200B) is not treated as a word separator space by default. Have you tried something like: <fo:character treat-as-word-space='true'>​</fo:character> If that doesn't work, then keep in mind that letter spacing has no meaning when applied to a single character, but applies to a sequence of characters. Accordingly, I would try something like: <fo:inline letter-spacing.minimum="0em" letter-spacing.maximum="0.1em">​​</fo:inline> or <fo:inline letter-spacing.minimum="0em" letter-spacing.maximum="0.1em">​<fo:character treat-as-word-space='true'>​</fo:character></fo:inline> If neither approach works, it may require some time with a visual debugger, e.g., Eclipse, to step through the code and find out where things go wrong. > But now FOP doesn't seem to treat the zero width space as such this way, > it doesn't break anymore at all! > > Note that Thai does make use of regular spaces to separate sentences and > for other purposes but there's no guarantee that you have spaces in a given > paragraph or in case of long sentences. > > Is there a way to insert a breakable space with minimum and optimum to > zero width and some small value for maximum? > > Carlos > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org > For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org > >
