On 7/15/2022 3:06 PM, 黄复雄 via ntg-context wrote:
I mistakenly sent the following letter to lua...@tug.org <mailto:lua...@tug.org> yesterday. I hope it won't cause anyone any trouble. Thanks to luigi for pointing out the error.
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Hi all,
I just updated my ConTeXt to

system          > ConTeXt  ver: 2022.07.06 21:42 LMTX  fmt: 2022.7.12  int: english/english

yesterday and got a error message in using tex.linebreak(head)  as follow:

luatex warning  > linebreak: no [ leftinit | rightinit | leftfill | rigthfill] expected

I can't get any information about them. The head and the list going to tex.linebreak() like:

the linbebreak routine expects:

<node :    nil <=   2371 =>   2873 : par vmodepar>
<node :   2371 <=   2873 =>   2879 : glue indentskip>

<parinitleftskip>
<parinitrightskip>

<node :   2873 <=   2879 =>   2891 : glyph unset>
<node :   2879 <=   2891 =>   2897 : glue userskip>
...
<node :    636 <=   3077 =>    639 : glyph unset>
<node :   3077 <=    639 =>   3089 : kern userkern>
<node :    639 <=   3089 =>   2334 : glue userskip>
<node :   3089 <=   2334 =>   3095 : rule normal>
<node :   2334 <=   3095 =>   3101 : glue spaceskip>
<node :   3095 <=   3101 =>    642 : glue spaceskip>
<node :   3101 <=    642 =>   3107 : penalty userpenalty>
<node :    642 <=   3107 =>    nil : glue userskip>

<infinite penalty>
<parfillleftskip>
<parfillrightskip>


My question is:
Which of them is necessary, and
How can I node.new() one and
Where should it go in the list?

the next upload will have a prepare helper

    print("=====================================================")
    local h = nodes.copylist(head)
    tex.preparelinebreak(h)
    local n = tex.linebreak(h)
    nodes.flushlist(n)
    print("=====================================================")

Any hint would be appreciated,
the luametatex par builder is a bit nore advanced than the luatex one as it offers more features for which it also needs s few more nodes in the list; it could work without but then its also doesn't honor some parameters which then would raise questions; so we're more picky instead

(the resulting line boxes are also somewhat different)

Hans

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                                          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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