Dear list, in a recent fix for bug #32893 ( https://savannah.gnu.org/bugs/index.php?32893 ), I added a check for tex fonts: whenever the family is teletype (i.e. "tt"), we should not run the ligatures and kerning program associated to the font via the .tfm file. This is done in Plugins/Metafont/tex_font.cpp and works just fine as a solution to the bug, but I wonder: why are there ligatures for teletype fonts in the first place? Also, given that the font metrics files are decades old I'm starting to fear that changing the ligatures might not be such a good idea after all.
Any ideas / comments? For completeness sake: The command tfmtopl ectt10.tfm reveals the following ligatures: (LIGTABLE (LABEL O 140) (LIG O 140 O 20) (STOP) (LABEL O 47) (LIG O 47 O 21) (STOP) (LABEL O 55) (LIG O 55 O 25) (LIG O 177 O 177) (STOP) (LABEL O 74) (LIG O 74 O 23) (STOP) (LABEL O 76) (LIG O 76 O 24) (STOP) (LABEL O 54) (LIG O 54 O 22) (STOP) (LABEL O 41) (LIG O 140 O 275) (STOP) (LABEL O 77) (LIG O 140 O 276) (STOP) ) Checking the T1 table in ftp://ftp.dante.de/pub/tex/macros/latex/doc/encguide.pdf one sees these are exactly those ligatures creating trouble for source code as reported in the bug tracker (commas, single quotes, dashes, etc.). Deleting this section from the generated file and reconverting it with pltotf produces a font metrics file which seems to make more sense to me than the original one. However, as said before this tfm files are decades old so there has to be some reason why they are how they are. -- Miguel de Benito. _______________________________________________ Texmacs-dev mailing list Texmacs-dev@gnu.org https://lists.gnu.org/mailman/listinfo/texmacs-dev
