Feature Requests item #385, was opened at 2005-07-10 15:38 You can respond by visiting: http://sarovar.org/tracker/?func=detail&atid=496&aid=385&group_id=106 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Robert (schlcht) Assigned to: Nobody (None) Summary: \ptexnoligatures should leave kerning intact Initial Comment: % The new \ptexnoligatures primitive will break the % horizontal positioning of \mathaccents if the base % character is slanted. % There is no problem with \accent, nor with \mathaccent % on upright characters: $\dot{A} \dot{\rm{A}} \dot{\Delta} \dot{\mit\Delta}$ {\tenit \accent'137 A} \ptexnoligatures\tenit % OK \ptexnoligatures\textfont0 % = cmr10, \rm % OK \ptexnoligatures\textfont1 % = cmmi10, \mit % breaks shift $\dot{A} \dot{\rm{A}} \dot{\Delta} \dot{\mit\Delta}$ {\tenit \accent'137 A} \bye, Robert ----------------------------------------------------------------------
Comment By: Robert (schlcht) Date: 2006-02-19 18:19
Message: Logged In: YES user_id=2217 In my opinion, this latest patch is too restrictive. It should be sufficient to document \pdfnoligatures as one of those commands whose scope is global to the current paragraph (and the rest of the document), just like setting, say, \hyphenpenalty or \hsize in the middle of a paragraph affects the complete paragraph. The current behaviour is also consistent with that of the hz-related stuff: \rpcode and friends have a retroactive effect, too. (Besides, the patch would break microtype.sty, which sets up the fonts as they are being loaded, which would happen in horizontal mode, mostly... ;-) PS. If it was for me, this feature request could be closed; I totally accept the "known limitation". ---------------------------------------------------------------------- Comment By: Taco Hoekwater (taco) Date: 2006-02-15 09:58 Message: Logged In: YES user_id=1608 The attached patch disallows \pdfnoligatures and \tagcode in non-vmodes, and restores the assignment functionality of \tagcode (that was an unrelated bug in 1.40-beta) ---------------------------------------------------------------------- Comment By: Taco Hoekwater (taco) Date: 2006-02-15 09:17 Message: Logged In: YES user_id=1608 We can disallow the primitive in non-vertical mode. Makes sense. ---------------------------------------------------------------------- Comment By: Bernd Raichle (bernd) Date: 2006-02-15 09:10 Message: Logged In: YES user_id=3344 Another limitation which should be documented: If \ptexnoligatures<font> is applied within a paragraph, the ligs and kerns created and inserted before this command are removed depending if a hyphenation pass is necessary to justify the paragraph. \ptexnoligatures<font> has the _global_ side effect to suppress all ligs and kerns of the font which are created _afterwards in time_. TeX breaks the lines of a paragraph at the end of the paragraph. If hyphenation has to be applied, ligs are remapped to single chars, (implicit) kerns are removed ... and reconstituted afterwards using the font information valid at this (later) time. If the font info is changed in between, which is true if \ptexnoligatures<font> is applied, already inserted ligs and kerns are removed. ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2005-07-12 20:23 Message: Logged In: YES user_id=421 Changing this into a feature request. ---------------------------------------------------------------------- Comment By: Taco Hoekwater (taco) Date: 2005-07-10 16:50 Message: Logged In: YES user_id=1608 This is because it (\ptexnoligatures) also disables the kerning information for the font. You'll have to accept that as a "known limitation" for now. ---------------------------------------------------------------------- You can respond by visiting: http://sarovar.org/tracker/?func=detail&atid=496&aid=385&group_id=106