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% \iffalse meta-comment
%
%% Copyright (C) 2018 by Marcel Krueger
%%
%% This file may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either
%% version 1.3c of this license or (at your option) any later
%% version. The latest version of this license is in:
%%
%% http://www.latex-project.org/lppl.txt
%%
%% and version 1.3 or later is part of all distributions of
%% LaTeX version 2005/12/01 or later.
%
%<*batch>
%<*gobble>
\ifx\jobname\relax\let\documentclass\undefined\fi
\ifx\documentclass\undefined
\csname fi\endcsname
%</gobble>
\input l3docstrip.tex
\keepsilent
\preamble
\endpreamble
\generate{\file{intopdf.sty}{\from{intopdf.dtx}{package}}}
\endbatchfile
%</batch>
%<*gobble>
\fi
\expandafter\ifx\csname @currname\endcsname\empty
\csname fi\endcsname
%</gobble>
%<*driver>
\documentclass[full]{l3doc}
\usepackage{intopdf,metalogo}
\begin{document}
\DocInput{intopdf.dtx}
\PrintIndex
\PrintChanges
\end{document}
%</driver>
%<*gobble>
\fi
%</gobble>
% \fi
%
% \GetFileInfo{intopdf.dtx}
% \title{The \pkg{intopdf} package\thanks{This document
% corresponds to \pkg{intopdf}~0.1.0, dated~2018/03/15.}}
% \author{Marcel Kr\"uger \\ \href{mailto:tex@2krueger.de}{tex@2krueger.de}}
%
% \maketitle
%
% \begin{documentation}
% This package defines a command \cmd\attachandlink{} which allows to attach an arbitrary file to your PDF document and linking to it from the main text.
% It is inspired by the \TeX Stack Exchange question \href{https://tex.stackexchange.com/questions/418606/embed-non-pdf-files-e-g-bibtex-into-pdf-with-hyperlink-in-the-pdf/418827#418827}{Embed non-PDF files (e.g., BibTex) into PDF with hyperlink in the PDF}. The engines pdf\LaTeX\ and \LuaLaTeX\ are supported.
%
% \section{Usage}
% \begin{function}{\attachandlink}
% \begin{syntax}
% |\attachandlink| \Arg{filename}[\meta{mime-type}]\Arg{Description}\Arg{link text}
% \end{syntax}
% The text \meta{link text} is inserted, linking to the file \meta{filename} which is attached to the document.
%
% \meta{Description} should be a description of the file and will be shown by the PDF viewer in the atttached files section and sometimes in a mouseover tooltip.\\
% \meta{mime-type} should be the MIME-Type of \meta{filename}. Currently \meta{mime-type} is mandatory but I hope to make it optional in a later release.
% \end{function}
% \section{Example}
% The source of the document is attached
% \attachandlink{intopdf.dtx}[application/x-tex]
% {The source of this document}{here}.
% \begin{verbatim}
% The source of the document is attached
% \attachandlink{intopdf.dtx}[application/x-tex]
% {The source of this document}{here}.
% \end{verbatim}
% \end{documentation}
% \begin{implementation}
% \section{The implementation}
% \changes{v0.0.1}{2018/03/13}{Initial version}
% \begin{macrocode}
%<@@=intopdf>
% \end{macrocode}
% \iffalse
%<*package>
\NeedsTeXFormat{LaTeX2e}
\RequirePackage{expl3}
\ProvidesExplPackage
{intopdf}
{2018/03/15}
{0.1.0}
{Embed non-PDF files into PDF with hyperlink}
\RequirePackage{hyperref}
%</package>
% \fi
% \changes{v0.1.0}{2018/03/15}{Added \LuaLaTeX\ support}
% Only \pdfTeX{} and \LuaLaTeX{} are supported.
% For other engines we show an error.
% \begin{macrocode}
\msg_new:nnnn{intopdf}{engine-unsupported}
{Your~TeX~engine~is~not~supported~by~intopdf.}
{To~use~intopdf,~you~have~to~use~pdfLaTeX~or~LuaLaTeX.}
% \end{macrocode}
% Then we define some wrappers for the primitives.
% \begin{macrocode}
\cs_generate_variant:Nn\str_case:nnF{VnF}
\str_case:VnF\c_sys_engine_str{
{pdftex}{
\cs_new:Nn\__intopdf_escape_name:n{\pdfescapename{#1}}
\cs_new:Nn\__intopdf_escape_string:n{(\pdfescapestring{#1})}
\cs_new:Nn\__intopdf_pdfobj:n{
\tex_immediate:D\pdftex_pdfobj:D{<<#1>>}
}
\cs_new:Nn\__intopdf_pdfstream_file:nn{
\tex_immediate:D\pdftex_pdfobj:D stream attr {#1} file {#2}
}
\cs_new:Nn\__intopdf_lastobj_ref:{
\c_space_tl
\int_use:N\pdftex_pdflastobj:D
\c_space_tl
0
\c_space_tl
R
}
\cs_new:Npn\__intopdf_annot:nnw#1#2{
\leavevmode
\pdftex_pdfstartlink:D attr{#1} user {#2}
}
\cs_new:Nn\__intopdf_annot_end:{
\pdftex_pdfendlink:D
}
}
{luatex}{
\RequirePackage{pdftexcmds}
\cs_new:Nn\__intopdf_escape_name:n{\pdf@escapename{#1}}
\cs_new:Nn\__intopdf_escape_string:n{(\pdf@escapestring{#1})}
\cs_new:Nn\__intopdf_pdfobj:n{
\tex_immediate:D\luatex_pdfextension:D obj{<<#1>>}
}
\cs_new:Nn\__intopdf_pdfstream_file:nn{
\tex_immediate:D\luatex_pdfextension:D obj stream attr {#1} file {#2}
}
\cs_new:Nn\__intopdf_lastobj_ref:{
\c_space_tl
\luatex_pdffeedback:D lastobj
\c_space_tl
0
\c_space_tl
R
}
\cs_new:Npn\__intopdf_annot:nnw#1#2{
\leavevmode
\luatex_pdfextension:D startlink attr{#1} user {#2}
}
\cs_new:Nn\__intopdf_annot_end:{
\luatex_pdfextension:D endlink
\scan_stop:
}
}
}{
\msg_critical:nn{intopdf}{engine-unsupported}
}
\cs_new:Nn\__intopdf_annot:nnn{
\__intopdf_annot:nnw{#1}{#2}
#3
\__intopdf_annot_end:
}
% \end{macrocode}
% \begin{macro}{\intopdf_attach_link:nnnn,\attachandlink}
% The main functionality.
% \begin{macrocode}
\cs_new_protected:Nn\intopdf_attach_link:nnnn{
\__intopdf_pdfstream_file:nn{
/Subtype /\__intopdf_escape_name:n{#2}
}{#1}
\__intopdf_pdfobj:n{
/Type /Filespec
/F \__intopdf_escape_string:n{#1}
/EF << /F \__intopdf_lastobj_ref: >>
/Desc \__intopdf_escape_string:n{#3}
}%
\__intopdf_annot:nnn{
\Hy@setpdfborder
\tl_if_empty:NF\@pdfhighlight{
/H\@pdfhighlight
}
\cs_if_free:NF\@urlbordercolor{
/C[\@urlbordercolor]
}
}{
/Subtype /Link
}{
\__intopdf_annot:nnn{}{
/Subtype /FileAttachment
/FS \__intopdf_lastobj_ref:
/F\c_space_tl 416
/CA\c_space_tl 0
/Contents \__intopdf_escape_string:n{#3}
}{
#4
}
}
}
\cs_new_protected:Npn\attachandlink#1[#2]#3#4{
\intopdf_attach_link:nnnn{#1}{#2}{#3}{#4}
}
% \end{macrocode}
% \end{macro}
% \end{implementation}
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