paragraph question

paragraph question

[Alan Stone]

Hi,

How do you access the first paragraph of each chapter ?

I guess with...

\setuphead[chapter][after=\PlayWithFirstParagraph]

\def\PlayWithFirstParagraph...

How to fill in the dots ?

Alan
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Re: paragraph question

[Alan Stone]

> How do you access the first paragraph of each chapter ?

... to calculate its number of lines ?

If not possible with ConTeXt commands, is this possible with LuaTeX commands?

Alan


On Tue, Mar 3, 2009 at 12:49 PM, Alan Stone
<software.list.1es9s@gmail.com> wrote:
> Hi,
>
> How do you access the first paragraph of each chapter ?
>
> I guess with...
>
> \setuphead[chapter][after=\PlayWithFirstParagraph]
>
> \def\PlayWithFirstParagraph...
>
> How to fill in the dots ?
>
> Alan
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Re: paragraph question

[Hans Hagen]

Alan Stone wrote:
>> How do you access the first paragraph of each chapter ?
> 
> .... to calculate its number of lines ?
> 
> If not possible with ConTeXt commands, is this possible with LuaTeX commands?

\the\prevgraf

but surely doable in luatex

Hans

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Re: paragraph question

[Hans Hagen]

Alan Stone wrote:
>> How do you access the first paragraph of each chapter ?
> 
> .... to calculate its number of lines ?
> 
> If not possible with ConTeXt commands, is this possible with LuaTeX commands?

there is support for positional info ... depending on the problem that 
might help (set two positions and calculate the difference); no time now 
to explain details

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Re: paragraph question

[Alan Stone]

On Wed, Mar 4, 2009 at 5:33 PM, Hans Hagen <pragma@wxs.nl> wrote:
> Alan Stone wrote:
>>>
>>> How do you access the first paragraph of each chapter ?
>>
>> .... to calculate its number of lines ?
>>
>> If not possible with ConTeXt commands, is this possible with LuaTeX
>> commands?
>
> there is support for positional info ... depending on the problem

To set \setuplettrine[Lines=1] if "chapter's first paragraph number of
lines = 1".

>that might
> help (set two positions and calculate the difference); no time now to
> explain details
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Re: paragraph question

[Marcin Borkowski]

Dnia Wed, Mar 04, 2009 at 05:02:40PM +0100, Alan Stone napisał(a):
> > How do you access the first paragraph of each chapter ?
> 
> ... to calculate its number of lines ?
> 
> If not possible with ConTeXt commands, is this possible with LuaTeX commands?

Maybe redefine \par to do something like

\def\nooflines{\prevgraf}\let\par=\oldpar

where previously you hd \let\oldpar=\par

Regards

-- 
Marcin Borkowski (http://mbork.pl)

Jezus żyje NAPRAWDĘ.
A Ty?
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Re: paragraph question

[Wolfgang Schuster]

Am 04.03.2009 um 23:38 schrieb Marcin Borkowski:

> Dnia Wed, Mar 04, 2009 at 05:02:40PM +0100, Alan Stone napisał 
> (a):
>>> How do you access the first paragraph of each chapter ?
>>
>> ... to calculate its number of lines ?
>>
>> If not possible with ConTeXt commands, is this possible with LuaTeX  
>> commands?
>
> Maybe redefine \par to do something like
>
> \def\nooflines{\prevgraf}\let\par=\oldpar
>
> where previously you hd \let\oldpar=\par

I don't think this will work without problems for a complete document.

Enclosing each paragraph with \bpar ... \epar allows you to count the  
paragraph
number since the last chapter and you can save \prevgraf at the end  
with twopass
data for the next run.

But wouldn't a direct \lettrine at the begin of the first paragraph be  
easier.

Wolfgang

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Re: paragraph question

[Hans Hagen]

Marcin Borkowski wrote:
> Dnia Wed, Mar 04, 2009 at 05:02:40PM +0100, Alan Stone napisał(a):
>>> How do you access the first paragraph of each chapter ?
>> ... to calculate its number of lines ?
>>
>> If not possible with ConTeXt commands, is this possible with LuaTeX commands?
> 
> Maybe redefine \par to do something like
> 
> \def\nooflines{\prevgraf}\let\par=\oldpar
> 
> where previously you hd \let\oldpar=\par

messing around with \par is dangerous and asking for trouble


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Re: paragraph question

[Alan Stone]

How do you invoke a command at the end of a paragraph ?

Alan
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Re: paragraph question

[Hans Hagen]

Alan Stone wrote:
> How do you invoke a command at the end of a paragraph ?

there is no hook for that (apart from adding a \endofpar command or 
whatever to every paragraph

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Re: paragraph question

[Alan Stone]

>> How do you invoke a command at the end of a paragraph ?
>
> there is no hook for that (apart from adding a \endofpar command or whatever
> to every paragraph

>From "TeX for the Impatient"...

-----------------------------------------------
\prevgraf [ <number> parameter ]
In horizontal mode, this parameter specifies the number of lines in the
paragraph so far; in vertical mode, it specifies the number of lines in
the previous paragraph.
-----------------------------------------------

After giving it some further thought and with reference to "specifies
the number of lines in the
paragraph so far", I don't need to know the paragraph's number of
lines but whether its "number of lines" = 1 or not.

Alan
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Re: paragraph question

[Wolfgang Schuster]

Am 05.03.2009 um 14:25 schrieb Alan Stone:

> After giving it some further thought and with reference to "specifies
> the number of lines in the
> paragraph so far", I don't need to know the paragraph's number of
> lines but whether its "number of lines" = 1 or not.


You can test whether the last paragraph had 1 or more lines and make
your decision dependent on the result but this can be done only after
the paragraph ist finished.

\def\paragraphlines
   {\blank % Finish the last paragraph
    \ifnum\prevgraf=1 What I want.\else Too many lines.\fi
    \blank}

\starttext

\dorecurse{30}{text }\paragraphlines

\dorecurse{10}{text }\paragraphlines

\dorecurse{50}{text }\paragraphlines

\stoptext

Wolfgang

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Re: paragraph question

[Marcin Borkowski]

Dnia Thu, Mar 05, 2009 at 02:44:53PM +0100, Wolfgang Schuster napisał(a):
> 
> Am 05.03.2009 um 14:25 schrieb Alan Stone:
> 
> >After giving it some further thought and with reference to "specifies
> >the number of lines in the
> >paragraph so far", I don't need to know the paragraph's number of
> >lines but whether its "number of lines" = 1 or not.
> 
> 
> You can test whether the last paragraph had 1 or more lines and make
> your decision dependent on the result but this can be done only after
> the paragraph ist finished.

Well, Wolfgang, you'll be surprised: it can be done (even in pure
vanilla TeX), at the expense of (possibly) nonuniform spacing.  Google
for a file "meashor.tex":).  (In Poland, we have a saying: "nasi górą!"
-- roughly "our people win!" -- I can't resist citing it here, since it
was Bogusław Jackowski who wrote that macros:)).

Regards

-- 
Marcin Borkowski (http://mbork.pl)

Remember that direct plagiarism, including the editing of other
people's work, is distinctly uncool.

                                    (Mark's Pixel Art Tutorial)
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Re: paragraph question

[Wolfgang Schuster]

Am 05.03.2009 um 15:05 schrieb Marcin Borkowski:

>> You can test whether the last paragraph had 1 or more lines and make
>> your decision dependent on the result but this can be done only after
>> the paragraph ist finished.
>
> Well, Wolfgang, you'll be surprised: it can be done (even in pure
> vanilla TeX), at the expense of (possibly) nonuniform spacing.  Google
> for a file "meashor.tex":).  (In Poland, we have a saying: "nasi  
> górą!"
> -- roughly "our people win!" -- I can't resist citing it here, since  
> it
> was Bogusław Jackowski who wrote that macros:)).

I found the information about display math in my TeX book (although my
TeX skills are not good enough to to write the code) but Alan want to
know the number of lines before the text is typeset to insert a lettrine
at the begin of the paragraph, can you also deliver code for this?

Wolfgang

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Re: paragraph question

[Marcin Borkowski]

Dnia Thu, Mar 05, 2009 at 03:14:23PM +0100, Wolfgang Schuster napisał(a):
> 
> Am 05.03.2009 um 15:05 schrieb Marcin Borkowski:
> 
> >>You can test whether the last paragraph had 1 or more lines and make
> >>your decision dependent on the result but this can be done only after
> >>the paragraph ist finished.
> >
> >Well, Wolfgang, you'll be surprised: it can be done (even in pure
> >vanilla TeX), at the expense of (possibly) nonuniform spacing.  Google
> >for a file "meashor.tex":).  (In Poland, we have a saying: "nasi  
> >górą!"
> >-- roughly "our people win!" -- I can't resist citing it here, since  
> >it
> >was Bogusław Jackowski who wrote that macros:)).
> 
> I found the information about display math in my TeX book (although my
> TeX skills are not good enough to to write the code) but Alan want to
> know the number of lines before the text is typeset to insert a lettrine
> at the begin of the paragraph, can you also deliver code for this?

Well, obviously not:).  But I only wanted to show that it _is_ possible
to know in which line we are before we have the whole paragraph typeset
(although with limitations).  Sorry, it was a bit off-topic, but I
couldn't resist the temptation to point out that Wolfgang The Great TeX
Haxxor doesn't know something:P.
> 
> Wolfgang

regards

-- 
Marcin Borkowski (http://mbork.pl)

Szema Izrael: Adonai Elohenu, Adonai Ehad!
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Re: paragraph question

[Alan Stone]

Thanks Wolfgang, however I'm looking for a solution without adding
additional commands to the text source.

Requires to switch to the LuaTeX list ?

Alan

On Thu, Mar 5, 2009 at 2:44 PM, Wolfgang Schuster
<schuster.wolfgang@googlemail.com> wrote:
>
> Am 05.03.2009 um 14:25 schrieb Alan Stone:
>
>> After giving it some further thought and with reference to "specifies
>> the number of lines in the
>> paragraph so far", I don't need to know the paragraph's number of
>> lines but whether its "number of lines" = 1 or not.
>
>
> You can test whether the last paragraph had 1 or more lines and make
> your decision dependent on the result but this can be done only after
> the paragraph ist finished.
>
> \def\paragraphlines
>  {\blank % Finish the last paragraph
>   \ifnum\prevgraf=1 What I want.\else Too many lines.\fi
>   \blank}
>
> \starttext
>
> \dorecurse{30}{text }\paragraphlines
>
> \dorecurse{10}{text }\paragraphlines
>
> \dorecurse{50}{text }\paragraphlines
>
> \stoptext
>
> Wolfgang
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
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> ___________________________________________________________________________________
>



-- 
Alan
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Re: paragraph question

[Wolfgang Schuster]

Am 05.03.2009 um 15:08 schrieb Alan Stone:

> Thanks Wolfgang, however I'm looking for a solution without adding
> additional commands to the text source.
>
> Requires to switch to the LuaTeX list ?

You can give it a try but I think Hans or Taco had given you then
a solution if this is possible but I could be wrong regarding LuaTeX.

Wolfgang

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Re: paragraph question

[Hans Hagen]

Alan Stone wrote:
> Thanks Wolfgang, however I'm looking for a solution without adding
> additional commands to the text source.
> 
> Requires to switch to the LuaTeX list ?

that does not help you as taco and i are on both lists

i can imagine that mkiv at some point privides something but it needs 
way more thinking (we have this end of par problem since ages) if only 
because what you see as end of par might actually be just before the 
final skips that ends a par

something everyendpar is on our todo list but later in the luatex project

Hans

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Re: paragraph question

[Alan Stone]

On Thu, Mar 5, 2009 at 5:09 PM, Hans Hagen <pragma@wxs.nl> wrote:
> Alan Stone wrote:
>>
>> Thanks Wolfgang, however I'm looking for a solution without adding
>> additional commands to the text source.
>>
>> Requires to switch to the LuaTeX list ?
>
> that does not help you as taco and i are on both lists
>
> i can imagine that mkiv at some point privides something but it needs way
> more thinking (we have this end of par problem since ages) if only because
> what you see as end of par might actually be just before the final skips
> that ends a par
>
> something everyendpar is on our todo list but later in the luatex project
>
> Hans

Ok.

In the meantime, an idea - for what it's worth...

Would it be possible to somehow, in the typesetting process, dummy
typeset the first paragraph of each chapter (in memory or in a dummy
output file) to determine whether its number of lines = 1 or > 1, or
determine its total number of lines, and work from there ?

Alan
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Re: paragraph question

[Hans Hagen]

Alan Stone wrote:
> On Thu, Mar 5, 2009 at 5:09 PM, Hans Hagen <pragma@wxs.nl> wrote:
>> Alan Stone wrote:
>>> Thanks Wolfgang, however I'm looking for a solution without adding
>>> additional commands to the text source.
>>>
>>> Requires to switch to the LuaTeX list ?
>> that does not help you as taco and i are on both lists
>>
>> i can imagine that mkiv at some point privides something but it needs way
>> more thinking (we have this end of par problem since ages) if only because
>> what you see as end of par might actually be just before the final skips
>> that ends a par
>>
>> something everyendpar is on our todo list but later in the luatex project
>>
>> Hans
> 
> Ok.
> 
> In the meantime, an idea - for what it's worth...
> 
> Would it be possible to somehow, in the typesetting process, dummy
> typeset the first paragraph of each chapter (in memory or in a dummy
> output file) to determine whether its number of lines = 1 or > 1, or
> determine its total number of lines, and work from there ?

a luatex/mkiv solution is actually rather simple but i'm in the middle 
of math stuff so it has to wait some time

Hans


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Re: paragraph question

[Alan Stone]

Another idea...

How do you make this line counter work ?

\newcount\parnumber
\newcount\linenumber
\def\myCounters{%
   \EveryPar{%
      \advance\parnumber by 1
      (P\the\parnumber)
      \EveryLine{%
%         (L\the\prevgraf)}}
      \advance\linenumber by 1
      (L\the\linenumber)}
      \linenumber=0\relax}
   \parnumber=0\relax}

\setuphead[chapter][page=,after={\myCounters}]

\starttext

\chapter{Chapter 0}

Only one line.

\dorecurse{2}{\chapter{Chapter #1}\input knuth}

\stoptext


Alan
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Re: paragraph question

[Hans Hagen]

Alan Stone wrote:
> Another idea...
> 
> How do you make this line counter work ?
> 
> \newcount\parnumber
> \newcount\linenumber
> \def\myCounters{%
>    \EveryPar{%
>       \advance\parnumber by 1
>       (P\the\parnumber)
>       \EveryLine{%
> %         (L\the\prevgraf)}}
>       \advance\linenumber by 1
>       (L\the\linenumber)}
>       \linenumber=0\relax}
>    \parnumber=0\relax}
> 
> \setuphead[chapter][page=,after={\myCounters}]
> 
> \starttext
> 
> \chapter{Chapter 0}
> 
> Only one line.
> 
> \dorecurse{2}{\chapter{Chapter #1}\input knuth}
> 
> \stoptext


\startlinenumbering

\input tufte

\stoplinenumbering

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               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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Re: paragraph question

[Alan Stone]

On Fri, Mar 6, 2009 at 3:05 PM, Hans Hagen <pragma@wxs.nl> wrote:
[...]
> \startlinenumbering
>
> \input tufte
>
> \stoplinenumbering

Ok, my question was a bit ambiguous...

I was not looking to number lines, but to count lines using EveryLine
within EveryPar, aka the paragraph counter \parnumber in the provided
code.

Alan
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