Pagereferences to more than one page

Pagereferences to more than one page

[Jan Heinen]

Happy New Year!

I want to reference to more than one page. In the exampe 
above only page 2 is referenced - how to get 2,4 ?


\starttext
You can find red vehicles on \at{page:}[red]

Here I want to see: "You can find red vehicles on page 2,4" 
(only page 2 is wrong)
\page

\pagereference[red]Here is a red car.
\page

\pagereference[green]Here is a green car.
\page

\pagereference[red]Here is a red bus.
\page

\pagereference[green]Here is a green car.
\page

\stoptext



Regards
Jannis

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___________________________________________________________________________________

Re: Pagereferences to more than one page

[luigi scarso]

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On Mon, Jan 2, 2012 at 5:30 PM, luigi scarso <luigi.scarso@gmail.com> wrote:

> On Mon, Jan 2, 2012 at 5:21 PM, Jan Heinen <JaHeinen@gmx.de> wrote:
> > Though I searched a lot for the question in the bottom,
> > - I could not find a parameter for \at which solves my problem
> > - I could not find any other command which helps me
> >
> > Is this a limitation of ConText? I can't imagin that I am the only one
> and
> > first who wants to reference to more than one page.
> I'm working on this
> but the idea of reference is that there is exactly one label for an
> object (which can be the same)
> so that \pagereference[red]foo
> \pagereference[red]boo
> is wrong because the label red has more than one reference, while
>  \pagereference[red:1]foo
> \pagereference[red:2]foo
> is ok (as hans said).
>

Using this idea, and the two pass way, we can wrap \pagereference and \at
with \PageReference and \At,
wheret \PageReference[red] really means \pagereference[red:1],
\pagereference[red:2] and so on,
while \At{page:}[red] put \at{page:}[red:],\at{}[red:2] and so on.
After the end of the first pass we store the multiple references into
multiref.tuc, and we read this file at the beginning of every other pass;
its data is used by \At
to put the correct reference.

This is not a good solution, because multiref.tuc must be keep in synch
with the tuc file of the source, so context ---purgeall must be call to
clean up temporary data and restart.
The ideal solution store these data into the tuc file --- context has
 core-two.lua and core-two.mkiv for this, if I've time I will fix.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\startluacode
document.jan =  document.jan or {}
document.jan.multiple_references =  document.jan.multiple_references or {}
document.jan.multiple_references_stored =
 document.jan.multiple_references_stored or {}
\stopluacode


\def\WriteToList{%
\startluacode
local f=io.open('multiref.tuc','r')
if f==nil then
 f=io.open('multiref.tuc','w')
 f:write("local multiple_references= multiple_references or {}\n")
 f:write("multiple_references={\n")
 for k,v in pairs(document.jan.multiple_references) do
    f:write(string.format("['\%s']=\%s,\n",k,v))
 end
 f:write("}\n")
 f:write("return multiple_references\n")
end
\stopluacode
}
\appendtoks\WriteToList\to\everystoptext


\def\ReadList{%
\startluacode
local f=io.open('multiref.tuc','r')
if f~=nil then
 f:close()
 document.jan.multiple_references_stored=dofile('multiref.tuc')
end
\stopluacode
}
\appendtoks\ReadList\to\everystarttext



%% wrap \pagereference
\def\PageReference[#1]{%
\startluacode
if document.jan.multiple_references['#1'] == nil then
  document.jan.multiple_references['#1'] = 1
 else
  document.jan.multiple_references['#1'] =
document.jan.multiple_references['#1'] +1
end
context('\\pagereference[#1:\%d]',document.jan.multiple_references['#1'])
\stopluacode%
}

%% wrap \at
\def\At#1[#2]{%
\startluacode
print('>>>>> ',document.jan.multiple_references['#2'])
if document.jan.multiple_references_stored['#2'] == nil then
 context('\\at{#1}[#2]')
else
  for j=1,document.jan.multiple_references_stored['#2'] do
    local ref=string.format('#2:\%d',j)
    local comma = ','
    if j==1 and document.jan.multiple_references_stored['#2']==1 then
context('\\at{#1}[\%s]',ref) end
    if j==1 and document.jan.multiple_references_stored['#2']~=1 then
      context('\\at{#1}[\%s],',ref)
    elseif 1<j and j<document.jan.multiple_references_stored['#2'] then
      context('\\at{}[\%s],',ref)
    elseif j== document.jan.multiple_references_stored['#2'] and
 document.jan.multiple_references_stored['#2']>1 then
     context('\\at{}[\%s]',ref)
    end
  end
end
\stopluacode
}

\starttext
You can find red vehicles on \At{page:}[red]
You can find yellow vehicles on \At{page:}[yellow]

Here I want to see: "You can find red vehicles on page 2,4" (only page 2 is
wrong)
\page

\PageReference[red]Here is a red car.
\page

\PageReference[green]Here is a green car.
\page

\PageReference[red]Here is a red bus.
\page

\PageReference[green]Here is a green car.
\page

\PageReference[yellow]Here is a yellow car.
\page



\stoptext


-- 
luigi

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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 / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Pagereferences to more than one page

[luigi scarso]

On Mon, Jan 2, 2012 at 5:21 PM, Jan Heinen <JaHeinen@gmx.de> wrote:
> Though I searched a lot for the question in the bottom,
> - I could not find a parameter for \at which solves my problem
> - I could not find any other command which helps me
>
> Is this a limitation of ConText? I can't imagin that I am the only one and
> first who wants to reference to more than one page.
I'm working on this
but the idea of reference is that there is exactly one label for an
object (which can be the same)
so that \pagereference[red]foo
\pagereference[red]boo
is wrong because the label red has more than one reference, while
 \pagereference[red:1]foo
\pagereference[red:2]foo
is ok (as hans said).
What you need is a register --- they are used in to build the Index :
see
http://wiki.contextgarden.net/Registers

-- 
luigi
___________________________________________________________________________________
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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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Pagereferences to more than one page

[Hans Hagen]

On 2-1-2012 17:21, Jan Heinen wrote:
> Though I searched a lot for the question in the bottom,
> - I could not find a parameter for \at which solves my problem
> - I could not find any other command which helps me
>
> Is this a limitation of ConText? I can't imagin that I am the only one
> and first who wants to reference to more than one page.
>
> Regards, Jannis
>
> ===== Copy
> I want to reference to more than one page. In the exampe above only page
> 2 is referenced - how to get 2,4 ?
>
> \starttext
> You can find red vehicles on \at{page:}[red]
>
>
> Here I want to see: "You can find red vehicles on page 2,4" (only page 2
> is wrong)
>
> \page
>
> \pagereference[red]Here is a red car.
> \page
>
> \pagereference[green]Here is a green car.
> \page
>
> \pagereference[red]Here is a red bus.
> \page
>
> \pagereference[green]Here is a green car.
> \page

that won't work as references need to be unique

[green-1]
[green-2]

etc


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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 / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Pagereferences to more than one page

[Jan Heinen]

Though I searched a lot for the question in the bottom,
- I could not find a parameter for \at which solves my problem
- I could not find any other command which helps me

Is this a limitation of ConText? I can't imagin that I am 
the only one and first who wants to reference to more than 
one page.

Regards, Jannis

===== Copy
I want to reference to more than one page. In the exampe 
above only page 2 is referenced - how to get 2,4 ?

\starttext
You can find red vehicles on \at{page:}[red]


Here I want to see: "You can find red vehicles on page 2,4" 
(only page 2 is wrong)

\page

\pagereference[red]Here is a red car.
\page

\pagereference[green]Here is a green car.
\page

\pagereference[red]Here is a red bus.
\page

\pagereference[green]Here is a green car.
\page

\stoptext




___________________________________________________________________________________
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
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________