linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

[黄复雄 via ntg-context]

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I mistakenly sent the following letter to luatex@tug.org yesterday. I hope
it won't cause anyone any trouble. Thanks to luigi for pointing out the
error.
-------------------------------------------------

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:

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


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

Any hint would be appreciated,
Huang Fusyong(黄复雄)

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Re: linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

[Hans Hagen via ntg-context]

On 7/15/2022 3:06 PM, 黄复雄 via ntg-context wrote:
> I mistakenly sent the following letter to luatex@tug.org 
> <mailto:luatex@tug.org> yesterday. I hope it won't cause anyone any 
> trouble. Thanks to luigi for pointing out the error.
> -------------------------------------------------
> 
> 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:
> 
> <node :    nil <=   2371 =>   2873 : par vmodepar>
> <node :   2371 <=   2873 =>   2879 : glue indentskip>
> <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>
> 
> 
> My question is:
> Which of them is necessary, and
> How can I node.new() one and
> Where should it go in the list?
> 
> Any hint would be appreciated,

Where do you intercept the list?



-----------------------------------------------------------------
                                           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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maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

[Hans Hagen via ntg-context]

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

-----------------------------------------------------------------
                                           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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If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

[黄复雄 via ntg-context]

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Thanks, Hans

I modified my list to:

<node :    nil <=   2371 =>   2873 : par vmodepar>
<node :   2371 <=   2873 =>   3113 : glue indentskip>
<node :   2873 <=   3113 =>   3119 : glue parinitleftskip>
<node :   3113 <=   3119 =>   2879 : glue parinitrightskip>
<node :   3119 <=   2879 =>   2891 : glyph unset>
...
<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 =>    645 : glue userskip>
<node :   3107 <=    645 =>   3125 : penalty userpenalty>
<node :    645 <=   3125 =>   3131 : glue parfillleftskip>
<node :   3125 <=   3131 =>    nil : glue parfillskip>

but the error is the same, so I'll wait the  tex.preparelinebreak(), and
observe it's work for more details.

Huang Fusyong(黄复雄)

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___________________________________________________________________________________

Re: linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

[黄复雄 via ntg-context]

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Thanks， Hans.
My module works again now, with the help of tex.preparelinebreak().

For potential readers:
tex.preparelinebreak(list)  modifyed my list for tex.linebreak(list) to:

<par vmodepar> # by user in advance, necessary
<glue parinitleftskip>
<glue parinitrightskip>
<glue indentskip>   # by user in advance, necessary
...
<penalty linepenalty> # The last glue here, in the end of the list, is
removed
<glue parfillleftskip>
<glue parfillskip> # as same as parfillrightskip



黄复雄 <aahuaang@gmail.com> 于2022年7月16日周六 10:02写道：

> Thanks, Hans
>
> I modified my list to:
>
> <node :    nil <=   2371 =>   2873 : par vmodepar>
> <node :   2371 <=   2873 =>   3113 : glue indentskip>
> <node :   2873 <=   3113 =>   3119 : glue parinitleftskip>
> <node :   3113 <=   3119 =>   2879 : glue parinitrightskip>
> <node :   3119 <=   2879 =>   2891 : glyph unset>
> ...
> <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 =>    645 : glue userskip>
> <node :   3107 <=    645 =>   3125 : penalty userpenalty>
> <node :    645 <=   3125 =>   3131 : glue parfillleftskip>
> <node :   3125 <=   3131 =>    nil : glue parfillskip>
>
> but the error is the same, so I'll wait the  tex.preparelinebreak(), and
> observe it's work for more details.
>
> Huang Fusyong(黄复雄)
>

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maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
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wiki     : https://contextgarden.net
___________________________________________________________________________________