зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.9 KiB
Plaintext
88 строки
2.9 KiB
Plaintext
|
New option of Libhyphen 2.7: NOHYPHEN
|
||
|
|
|
||
|
|
Hyphen, apostrophe and other characters may be word boundary characters,
|
||
|
|
but they don't need (extra) hyphenation. With NOHYPHEN option
|
||
|
|
it's possible to hyphenate the words parts correctly.
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
ISO8859-1
|
||
|
|
NOHYPHEN -,'
|
||
|
|
1-1
|
||
|
|
1'1
|
||
|
|
NEXTLEVEL
|
||
|
|
|
||
|
|
Description:
|
||
|
|
|
||
|
|
1-1 and 1'1 declare hyphen and apostrophe as word boundary characters
|
||
|
|
and NOHYPHEN with the comma separated character (or character sequence)
|
||
|
|
list forbid the (extra) hyphens at the hyphen and apostrophe characters.
|
||
|
|
|
||
|
Implicite NOHYPHEN declaration
|
||
|
|
|
||
|
|
Without explicite NEXTLEVEL declaration, Hyphen 2.8 uses the
|
||
|
|
previous settings, plus in UTF-8 encoding, endash (U+2013) and
|
||
|
|
typographical apostrophe (U+2019) are NOHYPHEN characters, too.
|
||
|
|
|
||
|
|
It's possible to enlarge the hyphenation distance from these
|
||
|
|
NOHYPHEN characters by using COMPOUNDLEFTHYPHENMIN and
|
||
|
|
COMPOUNDRIGHTHYPHENMIN attributes.
|
||
|
|
|
||
|
|
Compound word hyphenation
|
||
|
|
|
||
|
|
Hyphen library supports better compound word hyphenation and special
|
||
|
|
rules of compound word hyphenation of German languages and other
|
||
|
|
languages with arbitrary number of compound words. The new options,
|
||
|
|
COMPOUNDLEFTHYPHENMIN and COMPOUNDRIGHTHYPHENMIN help to set the right
|
||
|
|
style for the hyphenation of compound words.
|
||
|
|
|
||
|
|
Algorithm
|
||
|
|
|
||
|
|
The algorithm is an extension of the original pattern based hyphenation
|
||
|
|
algorithm. It uses two hyphenation pattern sets, defined in the same
|
||
|
|
pattern file and separated by the NEXTLEVEL keyword. First pattern
|
||
|
|
set is for hyphenation only at compound word boundaries, the second one
|
||
|
|
is for hyphenation within words or word parts.
|
||
|
|
|
||
|
|
Recursive compound level hyphenation
|
||
|
|
|
||
|
|
The algorithm is recursive: every word parts of a successful
|
||
|
|
first (compound) level hyphenation will be rehyphenated
|
||
|
|
by the same (first) pattern set.
|
||
|
|
|
||
|
|
Finally, when first level hyphenation is not possible, Hyphen uses
|
||
|
|
the second level hyphenation for the word or the word parts.
|
||
|
|
|
||
|
|
Word endings and word parts
|
||
|
|
|
||
|
|
Patterns for word endings (patterns with ellipses) match the
|
||
|
|
word parts, too.
|
||
|
|
|
||
|
|
Options
|
||
|
|
|
||
|
|
COMPOUNDLEFTHYPHENMIN: min. hyph. dist. from the left compound word boundary
|
||
|
|
COMPOUNDRIGHTHYPHENMIN: min. hyph. dist. from the right comp. word boundary
|
||
|
|
NEXTLEVEL: sign second level hyphenation patterns
|
||
|
|
|
||
|
|
Default hyphenmin values
|
||
|
|
|
||
|
|
Default values of COMPOUNDLEFTHYPHENMIN and COMPOUNDRIGHTHYPHENMIN are 0,
|
||
|
|
and 0 under the hyphenation, too. ("0" values of
|
||
|
|
LEFTHYPHENMIN and RIGHTHYPHENMIN mean the default "2" under the hyphenation.)
|
||
|
|
|
||
|
|
Examples
|
||
|
|
|
||
|
|
See tests/compound* test files.
|
||
|
|
|
||
|
|
Preparation of hyphenation patterns
|
||
|
|
|
||
|
|
It hasn't been special pattern generator tool for compound hyphenation
|
||
|
|
patterns, yet. It is possible to use PATGEN to generate both of
|
||
|
|
pattern sets, concatenate it manually and set the requested HYPHENMIN values.
|
||
|
|
(But don't forget the preprocessing steps by substrings.pl before
|
||
|
|
concatenation.) One of the disadvantage of this method, that PATGEN
|
||
|
|
doesn't know recursive compound hyphenation of Hyphen.
|
||
|
|
|
||
|
|
László Németh
|
||
|
|
<nemeth (at) openoffice.org>
|