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% This file is part of the Lecturer package.
% Paul Isambert -- July 2010.
%
\countdef\slideno=0
\slideno=1
\def\advanceslideno{\global\advance\slideno1 }
\def\slidenumber{\the\slideno}
%
%
%
% ATTRIBUTES
%
\def\ltr@slide_restrictions{width height background foreground image transition bookmark everyslide anchor font scale
vsize vpos hpos top left right bottom parindent parskip hsize baselineskip topskip pdftitle bookmarklevel bookmarkstyle areas areas* }
\def\ltr@slide_deleteattributes{%
\passexpanded{\ltr@attribute_deletion{ltr@inner_slide}}\ltr@slide_restrictions
}
\passexpandednobraces{\restrictparameter slide ltr@inner_slide:}\ltr@slide_restrictions\par
\ltr@restrictattribute slide:vpos; top center bottom\par
\ltr@restrictattribute ltr@inner_slide:vpos; top center bottom\par
\ltr@restrictattribute slide:hpos; ff rr fr rf\par
\ltr@restrictattribute ltr@inner_slide:hpos; ff rr fr rf\par
\ltr@boolean_attr{slide:bookmark}
\ltr@boolean_attr{ltr@inner_slide:bookmark}
\ltr@boolean_attr{slide:scale}
\ltr@boolean_attr{ltr@inner_slide:scale}
\def\ltr@slide_parameter#1{%
\ltr@todim_loop{#1}{width height vsize hsize top left bottom right parindent baselineskip topskip }%
\ltr@delete_empty{#1:font}%
\ltr@delete_empty{#1:hsize}\ltr@delete_empty{#1:left}\ltr@delete_empty{#1:right}%
\ltr@delete_empty{#1:vsize}\ltr@delete_empty{#1:top}\ltr@delete_empty{#1:bottom}%
\ltr@dimen_set{#1}{right}{left}{hsize}{\ltr@usevalueor #1:width;\pdfpagewidth}%
\ltr@dimen_set{#1}{bottom}{top}{vsize}{\ltr@usevalueor #1:height;\pdfpageheight}%
\ltr@deleteattribute #1:right;%
\ltr@deleteattribute #1:bottom;%
}
\defactiveparameter slide {%
\ltr@slide_parameter{#1}%
}
% #1 parameter (e.g. slide)
% #2 ordering attribute (e.g. right (for slide))
% #3 first obeying attribute (e.g. left)
% #4 second obeying attribute (e.g. hsize)
% #5 reference (e.g. (page)width)
\def\ltr@dimen_set#1#2#3#4#5{%
\nometa\ltr@ifattribute #1:#2;
{\ltr@passvalue{\defcs{ltr@#1:inner_#2}}#1:#2;%
\nometa\ltr@ifattribute #1:#3;
{\ltr@setattribute #1:#4; = {\dimexpr(#5-\dimexpr(\usecs{ltr@#1:inner_#2}+\ltr@usevalue #1:#3;))\relax} }% SPACE
{\nometa\ltr@ifattribute #1:#4;
{\ltr@setattribute #1:#3; = {\dimexpr(#5-\dimexpr(\usecs{ltr@#1:inner_#2}+\ltr@usevalue #1:#4;))\relax} }% SPACE
{\ltr@passvalue{\ltr@setattribute #1:#3;=}#1:#2; % SPACE
\ltr@setattribute #1:#4; = {\dimexpr(#5-\dimexpr(\usecs{ltr@#1:inner_#2}+\ltr@usevalue #1:#3;))\relax} }}}% SPACE
{}%
}
% Defaults
\vsize=\maxdimen % So no unwanted output occurs
\setparameter slide:
vpos = center
background = white
foreground = black
bookmark = true
bookmarklevel = 1
scale = false
\setparameter ltr@inner_slide:
meta = slide
\long\def\setslide#1#2\par{%
\ltr@space_loop{\ltr@setslide_do{#2}}{#1 }%
}
\long\def\ltr@setslide_do#1#2{%
\ltr@ifattribute {ltr@#2@inner_slide}:meta;
{\setparameter{ltr@#2@inner_slide}:}
{\ltr@setslide_new{#2}}%
#1\par
}
\def\ltr@setslide_new#1{%
\defcs{#1}{%
\ltr@setattribute ltr@inner_slide:meta;={ltr@#1@inner_slide}
\slide}%
\letcs{end#1}\endslide
\ifnum\formatnumber=3 % ConTeXt
\letcstocs{start#1}{#1}%
\letcs{stop#1}\endslide
\fi
\passexpandednobraces{\restrictparameter ltr@#1@inner_slide:}\ltr@slide_restrictions\par
\ltr@restrictattribute ltr@#1@inner_slide:vpos; top center bottom\par
\ltr@boolean_attr{ltr@#1@inner_slide:bookmark}%
\defactiveparameter ltr@#1@inner_slide {%
\ltr@slide_parameter{##1}%
}%
\setparameter{ltr@#1@inner_slide}:
meta = slide
}
%
%
%
%
%
%
% The \slide command.
% Attributes (beside those in the slide parameter):
% pdftitle; and a value without a = sign is taken
% as the slide title and recorded in \slidetitle;
% it is also recorded as pdftitle if there is this
% entry is missing.
%
\def\slidetitle{}\def\ltr@slide_pdftitle{}
\def\ltr@ltr@inner_slide_usepair#1#2{% Used by option_launchloop.
\ltr@setattribute ltr@inner_slide:#1;={#2} %
}
\def\ltr@ltr@inner_slide_useatom#1{% Idem. (Literate programming, he said?)
\def\slidetitle{#1}%
}
\def\slide{%
\ifnextnospace[{\ltr@slide}{\ltr@slide[]}%
}
\ifnum\formatnumber=3
\let\startslide\slide
\fi
\def\ltr@slide[#1]{%
\def\slidetitle{}
\ltr@option_launchloop{ltr@inner_slide}{#1}%
\ltr@slide_parameter{ltr@inner_slide}%
\edef\ltr@slide_pdftitle{%
\ltr@usevalueor ltr@inner_slide:pdftitle;{\slidetitle}%
}%
\pdfdest name {ltr@linktopage_\the\slideno} fit
\ltr@ifvalue ltr@inner_slide:bookmark;= true
{\ltr@ifattribute ltr@inner_slide:anchor;
{\createbookmark[\ltr@usevalue ltr@inner_slide:bookmarkstyle;]{\ltr@usevalue ltr@inner_slide:bookmarklevel;}[\ltr@usevalue ltr@inner_slide:anchor;]{\ltr@slide_dotitle}}
{\createbookmark[\ltr@usevalue ltr@inner_slide:bookmarkstyle;]{\ltr@usevalue ltr@inner_slide:bookmarklevel;}{\ltr@slide_dotitle}}}
{\ltr@passvalue\anchor ltr@inner_slide:anchor;}
%
\ltr@usevalueor ltr@inner_slide:font;{\ltr@usevalue job:font;}%
% Set the page dimensions.
\baselineskip=\ltr@usevalueor ltr@inner_slide:baselineskip;{12pt}\relax
\topskip=\ltr@usevalueor ltr@inner_slide:topskip;{12pt}\relax
\parskip=\ltr@usevalueor ltr@inner_slide:parskip;{0pt}\relax
\pdfpagewidth=\ltr@usevalueor ltr@inner_slide:width;{15cm}\relax
\pdfpageheight=\ltr@usevalueor ltr@inner_slide:height;{12cm}\relax
\pdfhorigin=\ltr@usevalueor ltr@inner_slide:left;{2cm}\relax
\pdfvorigin=\ltr@usevalueor ltr@inner_slide:top;{1cm}\relax
\hsize=\ltr@usevalueor ltr@inner_slide:hsize;{\dimexpr(\pdfpagewidth-2\pdfhorigin)\relax}\relax
\parindent=\ltr@usevalueor ltr@inner_slide:parindent;{0pt}\relax
\leftskip=0pt \rightskip=0pt plus 1fill\relax
\ltr@ifcasevalue ltr@inner_slide:hpos;
\val ff \rightskip=0pt
\val rr \leftskip=0pt plus 1fill\relax
\val rf \leftskip=0pt plus 1fill\rightskip=0pt
\endval
\ltr@usevalue ltr@inner_slide:everyslide;%
}
\def\ltr@slide_dotitle{%
\ifemptycommand\ltr@slide_pdftitle{Page \the\slideno}{\ltr@slide_pdftitle}%
}
\def\endslide{%
\par
\ltr@step_clear
\ifdim\pagetotal=0pt
\hbox{\vrule width 0pt}% If the slide is empty, there might be material in areas.
\fi % Close the previous step, if any.
\addtopageresources{%
/Properties << \ltr@page_properties >>
/Shading << \ltr@page_shading >>
/ExtGState << \ltr@page_extgstate >>
}%
\addtopageobject{%
\iffcs{ltr@inner_transition:\ltr@usevalueor ltr@inner_slide:transition;{ltr@no_value}}
{/Trans \usecs{ltr@inner_transition:\ltr@usevalueor ltr@inner_slide:transition;{ltr@no_value}} 0 R}
\ltr@pageattr_global}%
% End up as /Order [ [(Page 1) 1 0 R 2 0 R...] [(Page 2)...]...] in the catalog.
\global\eaddright\ltr@order_OCGs{[(\ltr@slide_dotitle) \ltr@page_OCGs] }%
% Here we go.
\penalty\ltr@output_penalty
\ltr@page_clear
}
\ifnum\formatnumber=3 % ConTeXt
\let\stopslide\endslide
\fi
%
% Resource management.
% Should be usable by anybody. Returns the list of /<name> <number> 0 R pairs
% in /Page ... /Resources << /Properties ... >>.
% Using \pdfpageresources would ruin everything.
%
\def\ltr@catalog_OCGs{} \def\ltr@page_OCGs{} \def\ltr@order_OCGs{}
\def\ltr@visible_OCGs{} \def\ltr@page_visibleOCGs{} \def\ltr@page_invisibleOCGs{}
\edef\ltr@page_PA{}
\def\ltr@page_properties{} \def\ltr@page_steplist{}
\def\ltr@page_shading{} \def\ltr@page_extgstate{}
\def\ltr@pageattr_global{}
\def\addshading#1#2{%
\global\eaddright\ltr@page_shading{/#1 #2 0 R }%
}
\def\addgstate#1#2{%
\global\eaddright\ltr@page_extgstate{/#1 #2 0 R }%
}
\def\addproperties#1#2{%
\global\eaddright\ltr@page_properties{/#1 #2 0 R }%
}
\def\addtopageresources#1{%
\begingroup
\edef\ltr@temp{\global\pdfpageresources{\the\pdfpageresources\spacecs #1 }}%
\ltr@temp
\endgroup
}
\def\addOCG#1{%
\global\eaddright\ltr@catalog_OCGs{#1 0 R }%
\global\eaddright\ltr@page_OCGs{#1 0 R }%
\global\eaddright\ltr@page_invisibleOCGs{#1 0 R }%
}
\def\addvisibleOCG#1{%
\global\eaddright\ltr@catalog_OCGs{#1 0 R }%
\global\eaddright\ltr@visible_OCGs{#1 0 R }%
\global\eaddright\ltr@page_OCGs{#1 0 R }%
\global\eaddright\ltr@page_visibleOCGs{#1 0 R }%
}
\def\addtopageobject#1{%
\begingroup
\edef\ltr@temp{\global\pdfpageattr{#1\the\pdfpageattr}}%
\ltr@temp
\endgroup
}
\def\addtoeachpageobject#1{%
\global\eaddright\ltr@pageattr_global{#1}%
}
\def\ltr@page_clear{%
\gdef\ltr@page_OCGs{}%
\gdef\ltr@page_visbleOCGs{}%
\gdef\ltr@page_invisbleOCGs{}%
\gdef\ltr@page_PA{}%
\gdef\ltr@page_properties{}%
\gdef\ltr@page_steplist{}%
\global\pdfpageattr={}%
\global\def\ltr@step_current{}%
\global\ltr@steps_count=0
\global\ltr@activesteps_count=0
\ltr@setattribute ltr@inner_slide:meta; = slide
\ltr@slide_deleteattributes
}
\endinput
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