Re: Conditional float references

[Otared Kavian <otared@gmail.com>]

Hi Marco,

Your macro is a wonderful help to have smart references: I have not yet tried it with references to maths formulas, theorems, lemmas and such, but Iguess it should work as well.

In order to help you nail down some small issues, here is how I used your module: I put the file you sent

	conditionalfloatreferences.mkvi

in a folder (i.e. a directory) and then in a TeX file I put the following (not so) minimal example excerpted from your file
%%% begin smartref-test.tex
\usemodule[conditionalfloatreferences]
\useMPlibrary [dum]
%\setuppagenumbering [alternative=singlesided]
\setuppagenumbering [alternative=doublesided]

\starttext
{\bf Test 1:}

See \smartref{figure}[fig:alpha] and \smartref{figure}[fig:gamma].
\page 
{\bf Test 2:}

See \smartref{figure}[fig:alpha] and \smartref{figure}[fig:gamma].

\startplacefigure [reference=fig:alpha] \externalfigure \stopplacefigure
\startplacefigure [reference=fig:beta]  \externalfigure \stopplacefigure

\page 
{\bf Test 3:}

See \smartref{figure}[fig:alpha] and \smartref{figure}[fig:gamma].

\startplacefigure [reference=fig:gamma] \externalfigure \stopplacefigure
\startplacefigure [reference=fig:delta] \externalfigure \stopplacefigure

\page 

{\bf Test 4:}

See \smartref{figure}[fig:alpha] and \smartref{figure}[fig:gamma].
\page 

{\bf Test 5:}

See \smartref{figure}[fig:alpha] and \smartref{figure}[fig:gamma].

\stoptext
%%% end smartref-test.tex

The issues I noticed are the following:
1. Typesetting the file gives an error message when there is no 
	\setuppagenumbering[alternative=doublesided]
Actually it typesets if one ignores the error message (but some issues like the ones below remain).

2. In the above minimal example, when stating 
		\setuppagenumbering[alternative=doublesided]
then Test 2 and Test 3 do not result in the smart references expected (they both result in « See figure 1 and figure 3. » while Test 2 should give « See figure 1 and figure 3 on next page. », and Test 3 should result in « See figure 1 on previous page and figure 3. »).

Thanks again for sharing your module.

Best regards: OK

On 22 sept. 2013, at 23:02, Marco Patzer <lists@homerow.info> wrote:

> Hi,
> 
> a couple of times the question came up¹²³ how to create more
> intelligent referencing. There are already mechanisms in the core,
> namely \somewhere and \atpage but they both have drawbacks.
> \somewhere happily prints its text if the figure is placed on the
> same double page. In fact, no text at all should be printed if the
> figure is visible. Furthermore it's a little verbose to use unless
> hidden in a custom macro. \atpage on the other hand doesn't hesitate
> to print “see figure 1.2 at page 42” while you're on page 42.
> 
> I'm aware that automatic generation of reference text is problematic
> since the text depends on the placement of floats which in turn
> depends on the text which might result in oscillation. I'm not sure
> how likely this is to occur in practice.
> 
> I don't know if there's interest in integrating such functionality
> into the core. I attached some code, a new macro \smartref, which
> takes the same arguments as \in.
> 
>  \smartref{figure}[fig:somefigure]
> 
> - it prints the reference if it is on the same page
>  (e.g. Figure 1.2)
> 
> - it prints the reference and a customizable text if the reference
>  is on the next/previous page (e.g. Figure 1.2 on the previous page)
> 
> - it prints the reference and the page if the reference is further
>  away than one page (e.g. Figure 1.2 on page 42)
> 
> - it adapts to single-sided and double-sided layouts
> 
> 
> Marco
> 
> ¹ http://thread.gmane.org/gmane.comp.tex.context/65295
> ² http://thread.gmane.org/gmane.comp.tex.context/59455
> ³ http://thread.gmane.org/gmane.comp.tex.context/76001
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If your question is of interest to others as well, please add an entry to the Wiki!

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