зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
4.1 KiB
Plaintext
123 строки
4.1 KiB
Plaintext
Non-standard hyphenation
|
|
------------------------
|
|
|
|
Some languages use non-standard hyphenation; `discretionary'
|
|
character changes at hyphenation points. For example,
|
|
Catalan: paral·lel -> paral-lel,
|
|
Dutch: omaatje -> oma-tje,
|
|
German (before the new orthography): Schiffahrt -> Schiff-fahrt,
|
|
Hungarian: asszonnyal -> asz-szony-nyal (multiple occurance!)
|
|
Swedish: tillata -> till-lata.
|
|
|
|
Using this extended library, you can define
|
|
non-standard hyphenation patterns. For example:
|
|
|
|
l·1l/l=l
|
|
a1atje./a=t,1,3
|
|
.schif1fahrt/ff=f,5,2
|
|
.as3szon/sz=sz,2,3
|
|
n1nyal./ny=ny,1,3
|
|
.til1lata./ll=l,3,2
|
|
|
|
or with narrow boundaries:
|
|
|
|
l·1l/l=,1,2
|
|
a1atje./a=,1,1
|
|
.schif1fahrt/ff=,5,1
|
|
.as3szon/sz=,2,1
|
|
n1nyal./ny=,1,1
|
|
.til1lata./ll=,3,1
|
|
|
|
Note: Libhnj uses modified patterns by preparing substrings.pl.
|
|
Unfortunatelly, now the conversion step can generate bad non-standard
|
|
patterns (non-standard -> standard pattern conversion), so using
|
|
narrow boundaries may be better for recent Libhnj. For example,
|
|
substrings.pl generates a few bad patterns for Hungarian hyphenation
|
|
patterns resulting bad non-standard hyphenation in a few cases. Using narrow
|
|
boundaries solves this problem. Java HyFo module can check this problem.
|
|
|
|
Syntax of the non-standard hyphenation patterns
|
|
------------------------------------------------
|
|
|
|
pat1tern/change[,start,cut]
|
|
|
|
If this pattern matches the word, and this pattern win (see README.hyphen)
|
|
in the change region of the pattern, then pattern[start, start + cut - 1]
|
|
substring will be replaced with the "change".
|
|
|
|
For example, a German ff -> ff-f hyphenation:
|
|
|
|
f1f/ff=f
|
|
|
|
or with expansion
|
|
|
|
f1f/ff=f,1,2
|
|
|
|
will change every "ff" with "ff=f" at hyphenation.
|
|
|
|
A more real example:
|
|
|
|
% simple ff -> f-f hyphenation
|
|
f1f
|
|
% Schiffahrt -> Schiff-fahrt hyphenation
|
|
%
|
|
schif3fahrt/ff=f,5,2
|
|
|
|
Specification
|
|
|
|
- Pattern: matching patterns of the original Liang's algorithm
|
|
- patterns must contain only one hyphenation point at change region
|
|
signed with an one-digit odd number (1, 3, 5, 7 or 9).
|
|
These point may be at subregion boundaries: schif3fahrt/ff=,5,1
|
|
- only the greater value guarantees the win (don't mix non-standard and
|
|
non-standard patterns with the same value, for example
|
|
instead of f3f and schif3fahrt/ff=f,5,2 use f3f and schif5fahrt/ff=f,5,2)
|
|
|
|
- Change: new characters.
|
|
Arbitrary character sequence. Equal sign (=) signs hyphenation points
|
|
for OpenOffice.org (like in the example). (In a possible German LaTeX
|
|
preprocessor, ff could be replaced with "ff, for a Hungarian one, ssz
|
|
with `ssz, according to the German and Hungarian Babel settings.)
|
|
|
|
- Start: starting position of the change region.
|
|
- begins with 1 (not 0): schif3fahrt/ff=f,5,2
|
|
- start dot doesn't matter: .schif3fahrt/ff=f,5,2
|
|
- numbers don't matter: .s2c2h2i2f3f2ahrt/ff=f,5,2
|
|
- In UTF-8 encoding, use Unicode character positions: össze/sz=sz,2,3
|
|
("össze" looks "össze" in an ISO 8859-1 8-bit editor).
|
|
|
|
- Cut: length of the removed character sequence in the original word.
|
|
- In UTF-8 encoding, use Unicode character length: paral·1lel/l=l,5,3
|
|
("paral·lel" looks "paral·1lel" in an ISO 8859-1 8-bit editor).
|
|
|
|
Dictionary developing
|
|
---------------------
|
|
|
|
There hasn't been extended PatGen pattern generator for non-standard
|
|
hyphenation patterns, yet.
|
|
|
|
Fortunatelly, non-standard hyphenation points are forbidden in the PatGen
|
|
generated hyphenation patterns, so with a little patch can be develop
|
|
non-standard hyphenation patterns also in this case.
|
|
|
|
Warning: If you use UTF-8 Unicode encoding in your patterns, call
|
|
substrings.pl with UTF-8 parameter to calculate right
|
|
character positions for non-standard hyphenation:
|
|
|
|
./substrings.pl input output UTF-8
|
|
|
|
Programming
|
|
-----------
|
|
|
|
Use hyphenate2() or hyphenate3() to handle non-standard hyphenation.
|
|
See hyphen.h for the documentation of the hyphenate*() functions.
|
|
See example.c for processing the output of the hyphenate*() functions.
|
|
|
|
Warning: change characters are lower cased in the source, so you may need
|
|
case conversion of the change characters based on input word case detection.
|
|
For example, see OpenOffice.org source
|
|
(lingucomponent/source/hyphenator/altlinuxhyph/hyphen/hyphenimp.cxx).
|
|
|
|
László Németh
|
|
<nemeth (at) openoffice.org>
|