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From: Rik Kabel <ConTeXt@rik.users.panix.com>
Newsgroups: gmane.comp.tex.context
Subject: Re: LMTX, BIdi, full paragraph,
 and spurious empty line
Date: Wed, 23 Jun 2021 19:44:57 -0400
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On 6/23/2021 18:10, Hans Hagen wrote:
> On 6/22/2021 4:52 AM, Rik Kabel wrote:
>> [...]ome an alternative way to do that.)
> I'll send you a possible fix but it needs a bit of testing. It has to 
> do with (probably spurious) spaces which means that the parbuilder 
> then considers the dir node to be a reasoable breakpoint (well, kin 
> dof okay as one gets what one asks for), but I'll be a bit more 
> agressive in dealing with that.
>
> Hans
>
Thank you, Hans, for looking into this so soon.

I did try what you sent, but see no difference. I have eliminated the 
changes to spaceskip as a cause and simplified the example, removing the 
spaceskip and delimitedtext.

New example, in which I get a spurious line after the third and fourth 
Walt Kelly entries:

    %% Demonstration of spurious line insertion on full paragraph with bidi

    \setupdirections     [bidi=on,method=unicode]

    \enabletrackers      [typesetters.directions]
    %\showmakeup          [glue,dir]

    \definepapersize     [Testing]
                          [width=6.69in]
    \setuppapersize      [Testing]

    \setuplayout         [width=fit,
                           backspace=1.4in,
                           cutspace=1in,
                           leftmargin=0.65in,
                           rightmargin=0.65in]

    \setupwhitespace     [small]


    \setupbodyfont       [libertinus,11pt]

    \startbuffer[Test]
         Kelly, Cynthia C., ed. 2005. {\em Oppenheimer and the Manhattan
         Project: Insights into J.~Robert Oppenheimer, ‘Father of the
         Atomic Bomb’}. Singapore: World Scientific.

         Kelly, Walt. 1953. {\em The Pogo Papers}. New York, NY Simon
         & Schuster.

         Kelly, Walt. 1953. {\em The Pogo Papers}. New York NY Simon
         & Schuster.

         Kelly, Walt. 1953. {\em The Pogo Papers}. New York, NY: Simon
         & Schuster.

         Kelly, Walt. 1953. {\em The Pogo Papers}. New York,, NY: Simon
         & Schuster.

         Kelly, Walt. 1953. {\em The Pogo Papers}. New York; NY Simon
         & Schuster.

         Kuhn, Thomas S. 1962. {\em The Structure of Scientific
         Revolutions}. Chicago, IL: University of Chicago Press.

         Weinreich, Max. 1945. “Der YIVO un di problemen fun undzer
         tsayt (דער ייִוואָ און די פּראָבלעמען פֿון אונדזער צײַט).”
         {\em YIVO Bleter} 25 (1): 3--18. The title is translated as
         {\em The YIVO and the problems of our time}, and also as
         {\em The YIVO faces the post-war world}.

    \stopbuffer

    \starttext

       \getbuffer[Test]

    \stoptext

-- 
Rik


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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 6/23/2021 18:10, Hans Hagen wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:03b8ac61-a94d-1603-57fe-7f14af64e0d8@xs4all.nl">On
      6/22/2021 4:52 AM, Rik Kabel wrote:
      <br>
      <blockquote type="cite">[...]ome an alternative way to do that.)
        <br>
      </blockquote>
      I'll send you a possible fix but it needs a bit of testing. It has
      to do with (probably spurious) spaces which means that the
      parbuilder then considers the dir node to be a reasoable
      breakpoint (well, kin dof okay as one gets what one asks for), but
      I'll be a bit more agressive in dealing with that.
      <br>
      <br>
      Hans
      <br>
      <br>
    </blockquote>
    <p>Thank you, Hans, for looking into this so soon.</p>
    <p>I did try what you sent, but see no difference. I have eliminated
      the changes to spaceskip as a cause and simplified the example,
      removing the spaceskip and delimitedtext.<br>
    </p>
    <p>New example, in which I get a spurious line after the third and
      fourth Walt Kelly entries:</p>
    <blockquote>
      <p><font face="monospace">%% Demonstration of spurious line
          insertion on full paragraph with bidi<br>
          <br>
          \setupdirections     [bidi=on,method=unicode]<br>
          <br>
          \enabletrackers      [typesetters.directions]<br>
          %\showmakeup          [glue,dir]<br>
          <br>
          \definepapersize     [Testing]<br>
                               [width=6.69in]<br>
          \setuppapersize      [Testing]<br>
          <br>
          \setuplayout         [width=fit,<br>
                                backspace=1.4in,<br>
                                cutspace=1in,<br>
                                leftmargin=0.65in,<br>
                                rightmargin=0.65in]<br>
          <br>
          \setupwhitespace     [small]<br>
          <br>
          <br>
          \setupbodyfont       [libertinus,11pt]<br>
          <br>
          \startbuffer[Test]<br>
              Kelly, Cynthia C., ed. 2005. {\em Oppenheimer and the
          Manhattan<br>
              Project: Insights into J.~Robert Oppenheimer, ‘Father of
          the<br>
              Atomic Bomb’}. Singapore: World Scientific.<br>
          <br>
              Kelly, Walt. 1953. {\em The Pogo Papers}. New York, NY
          Simon<br>
              &amp; Schuster.<br>
          <br>
              Kelly, Walt. 1953. {\em The Pogo Papers}. New York NY
          Simon<br>
              &amp; Schuster.<br>
          <br>
              Kelly, Walt. 1953. {\em The Pogo Papers}. New York, NY:
          Simon<br>
              &amp; Schuster.<br>
          <br>
              Kelly, Walt. 1953. {\em The Pogo Papers}. New York,, NY:
          Simon<br>
              &amp; Schuster.<br>
          <br>
              Kelly, Walt. 1953. {\em The Pogo Papers}. New York; NY
          Simon<br>
              &amp; Schuster.<br>
          <br>
              Kuhn, Thomas S. 1962. {\em The Structure of Scientific<br>
              Revolutions}. Chicago, IL: University of Chicago Press.<br>
          <br>
              Weinreich, Max. 1945. “Der YIVO un di problemen fun undzer<br>
              tsayt (דער ייִוואָ און די פּראָבלעמען פֿון אונדזער צײַט).”<br>
              {\em YIVO Bleter} 25 (1): 3--18. The title is translated
          as<br>
              {\em The YIVO and the problems of our time}, and also as<br>
              {\em The YIVO faces the post-war world}.<br>
          <br>
          \stopbuffer<br>
          <br>
          \starttext<br>
          <br>
            \getbuffer[Test]<br>
          <br>
          \stoptext</font><br>
      </p>
    </blockquote>
    <p>-- <br>
      Rik<br>
    </p>
  </body>
</html>

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