Re: new options for \setupinteractionscreen

[Vit Zyka <vit.zyka@gmail.com>]

Hans Hagen wrote:
> Vit Zyka wrote:
>> Dear ConTeXters,
>>
>> for PDF document one can set /PageLayout. It is a mode in which reader 
>> shows us pages (Single, Continous, Facing, ...). in ConTeXt one can set
>>
>>    \setupinteractionscreen[option=doublesided]
>>
>> which set layout /TwoColumnRight (understand two facing continuous 
>> pages with odd pages on the right side). Since PDF 1.5 there is a 
>> possibility to set 3 more layouts:
>>
>>    /TwoColumnLeft
>>    /TwoPageRight
>>    /TwoPageLeft
>>
>> I poropose to incorporate next lines of code to sources to enable 
>> setting of these layouts
>>
>>    % double=facing, column=continuous, right|left=where odd page
>>    \setupinteractionscreen[
>>      option=doublecolumnleft,
>>      option=doublepageright,
>>      option=doublepageleft,
>>      option=doublecolumnright, % for compatibility = doublesided
>>      option=doublecolumn,      % for simplicity = doublecolumnright
>>      option=doublepage,        % for simplicity = doublepageright
>>    ]
> 
> another option is (less new keywords)
> 
> option={doublesided,left,continue} % any order

Much cleverer! But in this case there is a backward incompatibility

   {doublesided,continue} = current {doublesided}
   {doublesided} = would mean NONcontinuous

Actually whenever I wanted to use facing layout, I wanted NONcontinuous. 
So I do not bother with this backward incompatibility. May be somebody 
else do?

Vit

>> These names are derrived from curren naming convention (doublesided) 
>> and PDF names. May be we can use more intuitive variants:
>>     option=facingright,
>>     option=facingleft,
>>     option=facingcontinuousright,
>>     option=facingcontinuousleft,
>>
>> Sorry I know English and Czech interface only and for FDF driver. May 
>> be somebody add more.
>>
>> Vit
>>
>> Proposal:
>> -----------------------------------------------------------------
>> % mult-con.tex
>> \startvariables            dutch                     english
>>                             german                    czech
>>                             italian                   romanian
>>                             french
>>
>>          doublecolumnright: doublecolumnright         doublecolumnright
>>                             doublecolumnright         dvasloupcevpravo
>>                             doublecolumnright         doublecolumnright
>>                             doublecolumnright
>>           doublecolumnleft: doublecolumnleft          doublecolumnleft
>>                             doublecolumnleft          dvasloupcevlevo
>>                             doublecolumnleft          doublecolumnleft
>>                             doublecolumnleft
>>               doublecolumn: doublecolumn              doublecolumn
>>                             doublecolumn              dvasloupce
>>                             doublecolumn              doublecolumn
>>                             doublecolumn
>>            doublepageright: doublepageright           doublepageright
>>                             doublepageright           dvestrankyvpravo
>>                             doublepageright           doublepageright
>>                             doublepageright
>>             doublepageleft: doublepageleft            doublepageleft
>>                             doublepageleft            dvestrankyvlevo
>>                             doublepageleft            doublepageleft
>>                             doublepageleft
>>                 doublepage: doublepage                doublepage
>>                             doublepage                dvestranky
>>                             doublepage                doublepage
>>                             doublepage
>> \stopvariables
>>
>> % core-int
>>    \setvalue{\??sc\c!option\v!doublecolumnright}{4} % compatibility
>>    \setvalue{\??sc\c!option\v!doublecolumnleft}{5}  % new
>>    \setvalue{\??sc\c!option\v!doublepageright}{6}   % new
>>    \setvalue{\??sc\c!option\v!doublepageleft}{7}    % new
>>    \setvalue{\??sc\c!option\v!doublecolumn}{4}      % compatibility
>>    \setvalue{\??sc\c!option\v!doublepage}{6}        % compatibility
>>
>> % spec-fdf.tex
>> \def\doPDFsetupscreen#1#2#3#4#5#6% watch the extra argument
>>    {\bgroup
>>    \xdef\currentPDFpagemode
>>       {\ifnum#6=4
>>          /PageLayout /TwoColumnRight
>>        \else\ifnum#6=5
>>          /PageLayout /TwoColumnLeft
>>        \else\ifnum#6=6
>>          /PageLayout /TwoPageRight
>>        \else\ifnum#6=7
>>          /PageLayout /TwoPageLeft
>>        \else
>>          /PageMode \ifcase#6
>>          /UseNone\or/FullScreen\or/UseOutlines\else/UseNone\fi
>>        \fi\fi\fi\fi}%
>>     \xdef\currentPDFviewerprefs % space after #6 needed, else \relax
>>       {\ifcase#6 \or\or\else /ViewerPreferences << /FitWindow true 
>> >>\fi}%
>>     \egroup}
>> ------------------------------------------------------------

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