Re: [NTG-context] disabling specific ligatures
On 3/21/2017 5:44 PM, Csikos Bela wrote:
Dear context users:
Is it possible to disable a specific ligature in a whole document in mkiv?
I would like to disable fi ligature.
Does it make a difference if I use a true type font installed on my
system?
normally that is done by setting a language feature in the font
you can also cook up a new feature, like
fonts.handlers.otf.addfeature {
name= "nofiligature1",
type= "chainsubstitution",
nocheck = true,
prepend = true,
lookups = {
{
type = "multiple",
data = {
["f"] = { "f", 0x200C },
-- ["i"] = { "i" },
},
},
},
data = {
rules = {
{
-- current = { { "f" }, { "i" } },
-- lookups = { 1, 1 },
current = { { "f" } },
after = { { "i" } },
lookups = { 1 },
},
},
}
}
fonts.handlers.otf.addfeature {
name= "nofiligature2",
type= "chainsubstitution",
nocheck = true,
append = true,
lookups = {
{
type = "ligature",
data = {
["f"] = { "f", 0x200C },
},
},
-- {
-- type = "substitution",
-- data = {
-- ["i"] = "i"
-- },
-- },
},
data = {
rules = {
{
-- current = { { "f" }, { 0x200C }, { "i" } },
-- lookups = { 1, 2 },
current = { { "f" }, { 0x200C } },
after = { { "i" } },
lookups = { 1 },
},
},
}
}
Here the two step approach is needed to make sure you get proper kerning
(given that a font has it, e.g pagella has between fe but not between
ffe so ...).
Anyway, I've added a helper to the upcoming so that it's a bit easier:
\blockligatures[fi,ff]
\blockligatures[fl]
\definefontfeature
[default]
[default]
[blockligatures=yes]
\setupbodyfont[pagella]
The only thing you need to keep in mind is that the \blockligature
commands have to come before fonts get defined (has to do with shared
resources and optimizations and such) and of course that you need to
enable the feature.
Hans
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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[NTG-context] disabling specific ligatures
Dear context users: Is it possible to disable a specific ligature in a whole document in mkiv? I would like to disable fi ligature. Does it make a difference if I use a true type font installed on my system? Thank you in advance, bcsikos ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Disabling specific ligatures
On Sun, 18 Sep 2011, Wolfgang Schuster wrote:
Am 18.09.2011 um 03:13 schrieb Aditya Mahajan:
On Sun, 18 Sep 2011, Khaled Hosny wrote:
On Sat, Sep 17, 2011 at 08:02:43PM -0400, Aditya Mahajan wrote:
In MkII, one can disable ligatures by inserting {} at the
appropriate place. For example `self{}ish` disables the ligature
between f and i. What is the equivalent way to disable ligatures in
MkIV?
Inserting a empty box? self\null ish seems to work.
\null works but it disable hyphenation.
The Unicode way
would be inserting U+200C (ZWNJ)
Thank you. This works perfectly.
Actually it does not. The word cannot hypenate wher \zwnj is inserted.
When you don’t mind the extra space you can use “|*|”.
This works well. But why is the * discretionary defined to insert the
extra 0.05em space? (I can overwrite it in my document, but I just curious
about the reason for the original definition).
Aditya___
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Re: [NTG-context] Disabling specific ligatures
Am 18.09.2011 um 03:13 schrieb Aditya Mahajan:
On Sun, 18 Sep 2011, Khaled Hosny wrote:
On Sat, Sep 17, 2011 at 08:02:43PM -0400, Aditya Mahajan wrote:
In MkII, one can disable ligatures by inserting {} at the
appropriate place. For example `self{}ish` disables the ligature
between f and i. What is the equivalent way to disable ligatures in
MkIV?
Inserting a empty box? self\null ish seems to work.
\null works but it disable hyphenation.
The Unicode way
would be inserting U+200C (ZWNJ)
Thank you. This works perfectly.
When you don’t mind the extra space you can use “|*|”.
Wolfgang
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[NTG-context] Disabling specific ligatures
In MkII, one can disable ligatures by inserting {} at the appropriate
place. For example `self{}ish` disables the ligature between f and i. What
is the equivalent way to disable ligatures in MkIV?
Thanks,
Aditya
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Wiki!
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Re: [NTG-context] Disabling specific ligatures
On Sat, Sep 17, 2011 at 08:02:43PM -0400, Aditya Mahajan wrote:
In MkII, one can disable ligatures by inserting {} at the
appropriate place. For example `self{}ish` disables the ligature
between f and i. What is the equivalent way to disable ligatures in
MkIV?
Inserting a empty box? self\null ish seems to work. The Unicode way
would be inserting U+200C (ZWNJ)
\starttext
self{}ish\par
self\null ish\par
self\zwnj ish
\stoptext
Regards,
Khaled
--
Khaled Hosny
Egyptian
Arab
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Re: [NTG-context] Disabling specific ligatures
On Sun, 18 Sep 2011, Khaled Hosny wrote:
On Sat, Sep 17, 2011 at 08:02:43PM -0400, Aditya Mahajan wrote:
In MkII, one can disable ligatures by inserting {} at the
appropriate place. For example `self{}ish` disables the ligature
between f and i. What is the equivalent way to disable ligatures in
MkIV?
Inserting a empty box? self\null ish seems to work.
\null works but it disable hyphenation.
The Unicode way
would be inserting U+200C (ZWNJ)
Thank you. This works perfectly.
Aditya
___
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Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
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