On 24/11/2004 22:23, Peter Kirk wrote:
On 24/11/2004 22:00, Asmus Freytag wrote:
...
The sequence SPACE NBSP *does* not allow a break after the SPACE under the line breaking rules we publish in UAX#14.
I tried to change does not into *does* and missed deleting the word 'not'.
I note that there is a relevant change being proposed to UAX #29 (public review issue #51), in that NBSP is now to be treated as a letter for determination of word and sentence boundaries. This certainly helps with the use of NBSP as a carrier for spacing diacritics, as e.g. in Hebrew.The common usage in HTML, is to use one or more NBSP followed by SPACE to mark a wider space, that allows a break at the end. NBSPs are not coalesced with other spaces.
In the Hebrew case, it is probably necessary to precede the NBSP with RLM to ensure that the NBSP and combining mark are taken with the rest of the word as right-to-left. Does this inserted RLM affect the situation with HTML, XML etc?
You are always free to surround the NBSP with other format characters, such as RLM or ZWSP, to tailor whatever behavior those format characters affect.Thank you.
What if I used the sequence <RLM, NBSP, combining mark>? Would I then get a break opportunity before the RLM, if it is preceded by SPACE? Presumably LRM could be used similarly if the same situation occurs in a left-to-right language.
Also the following clarification is being proposed for UAX #16 on line breaking (public review issue #56):
UTR#16 is UTF-EBCDIC, you must mean UAX#14.
The preferred base character for showing combining marks in isolation is U+00A0 No-Break SPACE. If a line break before or after the combining sequence is desired, U+200B ZERO WIDTH SPACE can be used. The use of U+0020 SPACE as a base character is deprecated.
But this draft also states:
when NBSP follows SPACE, there is a break opportunity after the SPACE and NBSP will go as visible space onto the next line.
This is different from what Asmus stated above: "The sequence SPACE NBSP *does* not allow a break
my editing mistake in composing my message to you. If you check the first sentence of http://www.unicode.org/report/tr14-16.html#GL you will see why it's *does* allow the break.
after the SPACE". So is this actually a proposed change to the line breaking rules? If so, it is one I support.
-- Peter Kirk [EMAIL PROTECTED] (personal) [EMAIL PROTECTED] (work) http://www.qaya.org/
