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\NeedsTeXFormat{LaTeX2e}[1994/06/01]
\ProvidesPackage{rotpages}[2002/05/30 R3.0 Rotated Pages (SC)]
%%
%% INTERFACE
%%
%% Switch on and off the page rotation
%% \rotboxpages
%% \endrotboxpages
%%
%% Setting of the dimensions of the rotated pages or columns (its the
%% package user responsibility to assure that sensible values are employed)
%% \setlenght{\rotboxheight}{...}
%% \setlength{\rotboxwidht}{...}
%% Since the rotated column needs to fit the same space as the non
%% rotated one, scaling is used to correct the dimensions. If the
%% initial values are not properly selected, the column may result
%% distorted. Dimensions larger than usual can be introduced to get
%% page scaling.
%%
%% Hooks for introducing frames and so on
%% \renewcommand{\rotboxAtRotationHook}[1]{...}
%% \renewcommand{\rotboxAtShippingHook}[1]{...}
%% In both command a box containing the page is passed as an
%% argument. The difference is that in the first case the hook is
%% invoked at the column preparation time (so that, e.g., the relative number
%% of the page among the rotated lot is available), while in the
%% second case the hook is invoked at the shipping time (so that,
%% e.g., the global page number is known).
%% Note: make sure the page processing hook returns a box whose global
%% height is all in the ``height'' height field and not in the
%% ``depth'' one.
%%
%% A command to test if we are rotating the pages or not (this uses
%% the ifthen package
%% \ifthenelse{\boolean{rotboxactive}}{...}{...}
\RequirePackage{graphics}
\RequirePackage{ifthen}
\RequirePackage{calc}
\newlength{\rotboxheight}
\newlength{\rotboxwidth}
\newboolean{rotboxactive}
\newbox\SC@deferredpages
\newbox\SC@curpage
%% Reasonable defaults for the hooks, the widths and the heights
%%\newcommand{\rotboxAtRotationHook}[1]{#1}
\newcommand{\rotboxAtRotationHook}[1]{%
\begingroup\fboxsep=3ex\raisebox{\depth}[\height+\depth][0pt]
{\fbox{#1}}\endgroup}
\newcommand{\rotboxAtShippingHook}[1]{#1}
%%\newcommand{\rotboxAtShippingHook}[1]{%
%% \begingroup\fboxsep=3ex\raisebox{\depth}[\height+\depth][0pt]
%% {\fbox{#1}}\endgroup}
\setboolean{rotboxactive}{false}
\AtBeginDocument{%
\setlength{\rotboxheight}{\vsize-6ex-1pt}
\setlength{\rotboxwidth}{\hsize-6ex-1pt}}
\let\SC@makecol=\@makecol
\let\SC@makefcolumn=\@makefcolumn
\newlength\SC@pageh
\newlength\SC@pagev
%%\newlength\SC@boxw
%%\newlength\SC@boxh
%%\newlength\SC@boxd
%% Processing of the column in ``upside-down mode''
%% Here we simply apply the relevant hook and store the page onto the
%% page stack
\def\SC@processpage{%
\message{...deferring page...}%
\global\setbox\SC@deferredpages\hbox{\unhbox\SC@deferredpages%
\hbox{\rotboxAtRotationHook{%
\raisebox{\depth}[\height+\depth][0pt]%
{\scalebox{-1}{\copy\@outputbox}}}}}}
%% Shipping of the pages previously pushed onto the stack
\def\SC@shippagestack{%
\global\setbox\SC@deferredpages\hbox{%
\unhbox\SC@deferredpages%
\global\setbox\SC@curpage\lastbox}%
\ifhbox\SC@curpage%
%%\settodepth\SC@boxd{\copy\SC@curpage}%
%%\settoheight\SC@boxh{\copy\SC@curpage}%
%%\typeout{vsize \the\vsize - sizeh \the\SC@boxh - sized \the\SC@boxd}
\noindent\rotboxAtShippingHook{\box\SC@curpage}\newpage%
{\SC@shippagestack}\fi}
%% Public command to activate the upside-down mode
\def\rotboxpages{%
\newpage
\setboolean{rotboxactive}{true}
%% save standard page size
\setlength\SC@pageh{\hsize}%
\setlength\SC@pagev{\vsize}%
\begingroup
\def\@opcol{\relax}%
\def\@startcolumn{\relax}%
\def\@makecol{\SC@makecol\SC@processpage}%
%%\def\@makefcolumn##1{\SC@makefcolumn{##1}\SC@processpage}%
%% Alter page size to guarantee that there is space for the frame
%% This is problematic as we have to change a number of measures. Currently
%% this works only if the columns are as high as the whole page.
\setlength\hsize{\rotboxwidth} \setlength\vsize{\rotboxheight}
\setlength\linewidth{\rotboxwidth}
\setlength\columnwidth{\rotboxwidth}
\setlength\textwidth{\rotboxwidth}
\setlength\textheight{\rotboxheight}
\setlength\@colht{\rotboxheight} \setlength\@colroom{\rotboxheight}}
%% Public command to deactivate the upside-down mode
\def\endrotboxpages{%
\newpage
\endgroup
%% Restore the values that don't get updated by the \endgroup
\setlength\hsize{\SC@pageh}
\setlength\vsize{\SC@pagev}
\SC@shippagestack
\setboolean{rotboxactive}{false}}
%%
%% R3.0
%% * Note: revision 2 was a major nightmare
%% * this version is a complete rework
%% R2.0
%% * Added: Arbitrary framing command
%% * Added: Arbitrary scaling of the rotated pages
%% * Fixed: incorrect global setting of the \fboxsep macro
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