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forest.dtx
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% \CheckSum{16651}
% \iffalse meta-comment
% forest.dtx
%% `forest' is a `pgf/tikz'-based package for drawing (linguistic) trees.
%%
%% Copyright (c) 2012-2017 Saso Zivanovic
%% (Sa\v{s}o \v{Z}ivanovi\'{c})
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3
%% 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.
%%
%% This work has the LPPL maintenance status `author-maintained'.
%%
%% This work consists of the following files:
%% - forest.dtx: central sources (with rudimentary implementation documentation)
%% - forest-libs.dtx: sources and documentation for libraries
%% + forest-compat.sty: sources/runtime for compatibility mode
%% - forest.ins: produces derived runtime .sty files
%% + forest.sty: main package
%% + forest-lib-*.sty: libraries (for the list, see forest.ins)
%% - forest-doc.tex: central documentation
%% - forest-doc.sty: private package needed to compile the documentation
%% - forest-index.dtx: sources of indexing package used in the documentation,
%% and also part of the documentation itself
%% - forest-doc.ins: produces derived .sty files needed to compile the documentation
%% - forest-index.sty
%% - forest-doc.ist: index style file needed to compile the documentation
%% - forest.pdf: documentation of core package implementation
%% - forest-doc.pdf: user's guide
%% - README
%% - LICENCE
%% To use the package, only the files marked with + need to be installed.
%%
%<*driver>
\documentclass[a4paper]{ltxdoc}
\usepackage{forest}
\usepackage{forest-doc}
\usepackage{fullpage}
\usepackage{hyperref}
\hypersetup{colorlinks=true,linkcolor=blue,citecolor=blue,hyperindex=false}
\usepackage{url}
%\input forest-common
\begin{document}
\DocInput{forest.dtx}
\end{document}
%</driver>
% \fi
%
% \title{Implementation of \FoRest;, a \PGF;/\TikZ;-based package for drawing linguistic
% trees\\\normalsize\forestversion}
%
% \author{Sa\v so \v Zivanovi\'c\footnote{e-mail:
% \href{mailto:[email protected]}{[email protected]}; web:
% \href{http://spj.ff.uni-lj.si/zivanovic/}{http://spj.ff.uni-lj.si/zivanovic/}}}
%
% \settodayfromforestdate
%
% \maketitle
%
% This file contains the documented source of \foRest;. If you are searching for the manual, follow
% this link to \href{http://mirrors.ctan.org/graphics/pgf/contrib/forest/forest-doc.pdf}{forest-doc.pdf}.
%
% The latest release of the package, including the sources, can be found on
% \href{http://ctan.org/pkg/forest}{CTAN}. For all versions of the package, including any
% non-yet-released work in progress, visit \href{https://github.com/sasozivanovic/forest}{\foRest;'s
% GitHub repo}. Contributions are welcome.
%
% A disclaimer: the code could've been much cleaner and better-documented \dots
%
% \tableofcontents
%
% \section{Identification}
% \begin{macrocode}
\ProvidesPackage{forest}[2017/07/14 v2.1.5 Drawing (linguistic) trees]
\RequirePackage{tikz}[2013/12/13]
\usetikzlibrary{shapes}
\usetikzlibrary{fit}
\usetikzlibrary{calc}
\usepgflibrary{intersections}
\RequirePackage{pgfopts}
\RequirePackage{etoolbox}[2010/08/21]
\RequirePackage{elocalloc}% for \locbox
\RequirePackage{environ}
\RequirePackage{xparse}
\RequirePackage{inlinedef}
\newtoks\ID@usercommands{}
\newcommand\NewInlineCommand[3][0]{%
\newcommand#2[#1]{#3}%
\ID@usercommands\xa{%
\the\ID@usercommands
\ifx\@foo#2%
\def\next{\ID@expandunsafe#2}%
\fi
}%
}
\def\@ExpandIfTF#1{%
\csname
% I'm not 100% sure if this plays well in every situation
\csname if#1\endcsname
@firstoftwo%
\else
@secondoftwo%
\fi
\endcsname
}
\patchcmd{\ID@switch}
{\ifcat\noexpand\@foo\space}
{\the\ID@usercommands\ifcat\noexpand\@foo\space}
{%
\NewInlineCommand[2]\ExpandIfT{%
\MultiExpand{3}{%
\@ExpandIfTF{#1}{#2}{}%
}%
}
\NewInlineCommand[2]\ExpandIfF{%
\MultiExpand{3}{%
\@ExpandIfTF{#1}{}{#2}%
}%
}
\NewInlineCommand[3]\ExpandIfTF{%
\MultiExpand{3}{%
\@ExpandIfTF{#1}{#2}{#3}%
}%
}%
\newcommand\InlineNoDef[1]{%
\begingroup
% Define a few ``quarks''
\def\Expand{\Expand}\def\Super{\Super}%
\def\UnsafeExpand{\UnsafeExpand}\def\MultiExpand{\MultiExpand}%
\def\Recurse{\Recurse}\def\NoExpand{\NoExpand}%
\def\Q@END{\Q@END}%
% Define a toks register
\ID@toks{}%
% Signal that we need to look for a star
\@testtrue\ID@starfalse\ID@starstarfalse\ID@bangfalse
% Start scanning for \def or \gdef
\ID@scan#1\Q@END{}%
\expandafter\endgroup
%\expandafter\@firstofone
\the\ID@toks
}%
}%
{%
\PackageWarning{forest}{Could not patch inlinedef! Disabling it. Except in some special situations (nested arrays), stuff will probably still work, but there's no guarantee. Please report this situation to the author (but check first if a new version already exists).}{}%
\let\Inline\relax
\def\Expand#1{#1}%
\def\MultiExpand#1#2{#2}%
\def\InlineNoDef#1{#1}%
\def\ExpandIfT#1#2{\@ExpandIfTF{#1}{#2}{}}%
\def\ExpandIfF#1#2{\@ExpandIfTF{#1}{}{#2}}%
\def\ExpandIfTF#1#2#3{\@ExpandIfTF{#1}{#2}{#3}}%
}
% \end{macrocode}
%
% |/forest| is the root of the key hierarchy.
% \begin{macrocode}
\pgfkeys{/forest/.is family}
\def\forestset#1{\pgfqkeys{/forest}{#1}}
% \end{macrocode}
%
% \section{Package options}
% \begin{macrocode}
\newif\ifforest@external@
\newif\ifforesttikzcshack
\newif\ifforest@install@keys@to@tikz@path@
\newif\ifforestdebugnodewalks
\newif\ifforestdebugdynamics
\newif\ifforestdebugprocess
\newif\ifforestdebugtemp
\newif\ifforestdebug
\def\forest@compat{}
\forestset{package@options/.cd,
external/.is if=forest@external@,
tikzcshack/.is if=foresttikzcshack,
tikzinstallkeys/.is if=forest@install@keys@to@tikz@path@,
compat/.code={\appto\forest@compat{,#1}},
compat/.default=most,
.unknown/.code={% load library
\eappto\forest@loadlibrarieslater{%
\noexpand\useforestlibrary{\pgfkeyscurrentname}%
\noexpand\forestapplylibrarydefaults{\pgfkeyscurrentname}%
}%
},
debug/.code={\forestdebugtrue\pgfqkeys{/forest/package@options/debug}{#1}},
debug/.default={nodewalks,dynamics,process},
debug/nodewalks/.is if=forestdebugnodewalks,
debug/dynamics/.is if=forestdebugdynamics,
debug/process/.is if=forestdebugprocess,
}
\forest@install@keys@to@tikz@path@true
\foresttikzcshacktrue
\def\forest@loadlibrarieslater{}
\AtEndOfPackage{\forest@loadlibrarieslater}
\NewDocumentCommand\useforestlibrary{s O{} m}{%
\def\useforestlibrary@@##1{\useforestlibrary@{#2}{##1}}%
\forcsvlist\useforestlibrary@@{#3}%
\IfBooleanT{#1}{\forestapplylibrarydefaults{#3}}%
}
\def\useforestlibrary@#1#2{%
\RequirePackage[#1]{forest-lib-#2}%
\csuse{forest@compat@libraries@#2}%
}
\def\forestapplylibrarydefaults#1{\forcsvlist\forestapplylibrarydefaults@{#1}}
\def\forestapplylibrarydefaults@#1{\forestset{libraries/#1/defaults/.try}}
\NewDocumentCommand\ProvidesForestLibrary{m O{}}{%
\ProvidesPackage{forest-lib-#1}[#2]%
\csdef{forest@libraries@loaded@#1}{}%
}
\def\forest@iflibraryloaded#1#2#3{\ifcsdef{forest@libraries@loaded@#1}{#2}{#3}}
\ProcessPgfPackageOptions{/forest/package@options}
% \end{macrocode}
% \section{Patches}
%
% This macro implements a fairly safe patching mechanism: the code is only patched if the original
% hasn't changed. If it did change, a warning message is printed. (This produces a spurious warning
% when the new version of the code fixes something else too, but what the heck.)
%
% \begin{macrocode}
\def\forest@patch#1#2#3#4#5{%
% #1 = cs to be patched
% %2 = purpose of the patch
% #3 = macro arguments
% #4 = original code
% #5 = patched code
\csdef{forest@original@#1}#3{#4}%
\csdef{forest@patched@#1}#3{#5}%
\ifcsequal{#1}{forest@original@#1}{%
\csletcs{#1}{forest@patched@#1}%
}{%
\ifcsequal{#1}{forest@patched@#1}{% all is good, the patch is in!
}{%
\PackageWarning{forest}{Failed patching '\expandafter\string\csname #1\endcsname'. Purpose of the patch: #2}%
}%
}%
}
% \end{macrocode}
%
% Patches for \PGF; 3.0.0 --- required version is [2013/12/13].
% \begin{macrocode}
\forest@patch{pgfgettransform}{fix a leaking space}{#1}{%
\edef#1{{\pgf@pt@aa}{\pgf@pt@ab}{\pgf@pt@ba}{\pgf@pt@bb}{\the\pgf@pt@x}{\the\pgf@pt@y}}
}{%
\edef#1{{\pgf@pt@aa}{\pgf@pt@ab}{\pgf@pt@ba}{\pgf@pt@bb}{\the\pgf@pt@x}{\the\pgf@pt@y}}%
}
% \end{macrocode}
%
% \section{Utilities}
%
% This is handy.
% \begin{macrocode}
\def\forest@empty{}
% \end{macrocode}
%
% Escaping |\if|s.
% \begin{macrocode}
\long\def\@escapeif#1#2\fi{\fi#1}
\long\def\@escapeifif#1#2\fi#3\fi{\fi\fi#1}
\long\def\@escapeififif#1#2\fi#3\fi#4\fi{\fi\fi\fi#1}
% \end{macrocode}
%
% \begin{macrocode}
\def\forest@repeat@n@times#1{% #1=n, #2=code
\expandafter\forest@repeat@n@times@\expandafter{\the\numexpr#1}}
\def\forest@repeat@n@times@#1{%
\ifnum#1>0
\@escapeif{%
\expandafter\forest@repeat@n@times@@\expandafter{\the\numexpr#1-1}%
}%
\else
\expandafter\@gobble
\fi
}
\def\forest@repeat@n@times@@#1#2{%
#2%
\forest@repeat@n@times@{#1}{#2}%
}
% \end{macrocode}
%
% A factory for creating |\...loop...| macros.
% \begin{macrocode}
\def\newloop#1{%
\count@=\escapechar
\escapechar=-1
\expandafter\newloop@parse@loopname\string#1\newloop@end
\escapechar=\count@
}%
{\lccode`7=`l \lccode`8=`o \lccode`9=`p
\lowercase{\gdef\newloop@parse@loopname#17889#2\newloop@end{%
\edef\newloop@marshal{%
\noexpand\csdef{#1loop#2}####1\expandafter\noexpand\csname #1repeat#2\endcsname{%
\noexpand\csdef{#1iterate#2}{####1\relax\noexpand\expandafter\expandafter\noexpand\csname#1iterate#2\endcsname\noexpand\fi}%
\expandafter\noexpand\csname#1iterate#2\endcsname
\let\expandafter\noexpand\csname#1iterate#2\endcsname\relax
}%
}%
\newloop@marshal
}%
}%
}%
% \end{macrocode}
%
% Loop that can be arbitrarily nested. (Not in the same macro, however: use another macro for the inner loop.) Usage: |\safeloop_code_\if..._code_\saferepeat|. |\safeloopn| expands to the current repetition number of the innermost group.
% \begin{macrocode}
\def\newsafeloop#1{%
\csdef{safeloop@#1}##1\saferepeat{%
\forest@temp@toks{##1}%
\csedef{safeiterate@#1}{%
\the\forest@temp@toks\relax
\noexpand\expandafter
\expandonce{\csname safeiterate@#1\endcsname}%
\noexpand\fi
}%
\csuse{safeiterate@#1}%
\advance\noexpand\safeloop@depth-1\relax
\cslet{safeiterate@#1}\relax
}%
\expandafter\newif\csname ifsafebreak@\the\safeloop@depth\endcsname
}%
\newcount\safeloop@depth
\def\safeloop{%
\advance\safeloop@depth1
\ifcsdef{safeloop@\the\safeloop@depth}{}{\expandafter\newsafeloop\expandafter{\the\safeloop@depth}}%
\csdef{safeloopn@\the\safeloop@depth}{0}%
\csuse{safeloop@\the\safeloop@depth}%
\csedef{safeloopn@\the\safeloop@depth}{\number\numexpr\csuse{safeloopn@\the\safeloop@depth}+1}%
}
\let\saferepeat\fi
\def\safeloopn{\csuse{safeloopn@\the\safeloop@depth}}%
% \end{macrocode}
%
% Another safeloop for usage with ``repeat'' / ``while'' // ``until'' keys, so that the user can refer to loop $n$s for outer loops.
% \begin{macrocode}
\def\newsafeRKloop#1{%
\csdef{safeRKloop@#1}##1\safeRKrepeat{%
\forest@temp@toks{##1}%
\csedef{safeRKiterate@#1}{%
\the\forest@temp@toks\relax
\noexpand\expandafter
\expandonce{\csname safeRKiterate@#1\endcsname}%
\noexpand\fi
}%
\csuse{safeRKiterate@#1}%
\advance\noexpand\safeRKloop@depth-1\relax
\cslet{safeRKiterate@#1}\relax
}%
\expandafter\newif\csname ifsafeRKbreak@\the\safeRKloop@depth\endcsname
}%
\newcount\safeRKloop@depth
\def\safeRKloop{%
\advance\safeRKloop@depth1
\ifcsdef{safeRKloop@\the\safeRKloop@depth}{}{\expandafter\newsafeRKloop\expandafter{\the\safeRKloop@depth}}%
\csdef{safeRKloopn@\the\safeRKloop@depth}{0}%
\csuse{safeRKbreak@\the\safeRKloop@depth false}%
\csuse{safeRKloop@\the\safeRKloop@depth}%
\csedef{safeRKloopn@\the\safeRKloop@depth}{\number\numexpr\csuse{safeRKloopn@\the\safeRKloop@depth}+1}%
}
\let\safeRKrepeat\fi
\def\safeRKloopn{\csuse{safeRKloopn@\the\safeRKloop@depth}}%
% \end{macrocode}
%
% Additional loops (for embedding).
% \begin{macrocode}
\newloop\forest@loop
% \end{macrocode}
% New counters, dimens, ifs.
% \begin{macrocode}
\newdimen\forest@temp@dimen
\newcount\forest@temp@count
\newcount\forest@n
\newif\ifforest@temp
\newcount\forest@temp@global@count
\newtoks\forest@temp@toks
% \end{macrocode}
%
% Appending and prepending to token lists.
% \begin{macrocode}
\def\etotoks#1#2{\edef\pot@temp{#2}\expandafter#1\expandafter{\pot@temp}}
\def\apptotoks#1#2{\expandafter#1\expandafter{\the#1#2}}
\long\def\lapptotoks#1#2{\expandafter#1\expandafter{\the#1#2}}
\def\eapptotoks#1#2{\edef\pot@temp{#2}\expandafter\expandafter\expandafter#1\expandafter\expandafter\expandafter{\expandafter\the\expandafter#1\pot@temp}}
\def\pretotoks#1#2{\toks@={#2}\expandafter\expandafter\expandafter#1\expandafter\expandafter\expandafter{\expandafter\the\expandafter\toks@\the#1}}
\def\epretotoks#1#2{\edef\pot@temp{#2}\expandafter\expandafter\expandafter#1\expandafter\expandafter\expandafter{\expandafter\pot@temp\the#1}}
\def\gapptotoks#1#2{\expandafter\global\expandafter#1\expandafter{\the#1#2}}
\def\xapptotoks#1#2{\edef\pot@temp{#2}\expandafter\expandafter\expandafter\global\expandafter\expandafter\expandafter#1\expandafter\expandafter\expandafter{\expandafter\the\expandafter#1\pot@temp}}
\def\gpretotoks#1#2{\toks@={#2}\expandafter\expandafter\expandafter\global\expandafter\expandafter\expandafter#1\expandafter\expandafter\expandafter{\expandafter\the\expandafter\toks@\the#1}}
\def\xpretotoks#1#2{\edef\pot@temp{#2}\expandafter\expandafter\expandafter\global\expandafter\expandafter\expandafter#1\expandafter\expandafter\expandafter{\expandafter\pot@temp\the#1}}
% \end{macrocode}
%
% Expanding number arguments.
% \begin{macrocode}
\def\expandnumberarg#1#2{\expandafter#1\expandafter{\number#2}}
\def\expandtwonumberargs#1#2#3{%
\expandafter\expandtwonumberargs@\expandafter#1\expandafter{\number#3}{#2}}
\def\expandtwonumberargs@#1#2#3{%
\expandafter#1\expandafter{\number#3}{#2}}
\def\expandthreenumberargs#1#2#3#4{%
\expandafter\expandthreenumberargs@\expandafter#1\expandafter{\number#4}{#2}{#3}}
\def\expandthreenumberargs@#1#2#3#4{%
\expandafter\expandthreenumberargs@@\expandafter#1\expandafter{\number#4}{#2}{#3}}
\def\expandthreenumberargs@@#1#2#3#4{%
\expandafter#1\expandafter{\number#4}{#2}{#3}}
% \end{macrocode}
%
% A macro converting all non-alphanumerics (and an initial number) in a string to |__|. |#1| =
% string, |#2| = receiving macro. Used for declaring pgfmath functions.
% \begin{macrocode}
\def\forest@convert@others@to@underscores#1#2{%
\def\forest@cotu@result{}%
\forest@cotu@first#1\forest@end
\let#2\forest@cotu@result
}
\def\forest@cotu{%
\let\forest@cotu@have@num\forest@cotu@have@alpha
\futurelet\forest@cotu@nextchar\forest@cotu@checkforspace
}
\def\forest@cotu@first{%
\let\forest@cotu@have@num\forest@cotu@haveother
\futurelet\forest@cotu@nextchar\forest@cotu@checkforspace
}
\def\forest@cotu@checkforspace{%
\expandafter\ifx\space\forest@cotu@nextchar
\let\forest@cotu@next\forest@cotu@havespace
\else
\let\forest@cotu@next\forest@cotu@nospace
\fi
\forest@cotu@next
}
\def\forest@cotu@havespace#1{%
\appto\forest@cotu@result{_}%
\forest@cotu#1%
}
\def\forest@cotu@nospace{%
\ifx\forest@cotu@nextchar\forest@end
\@escapeif\@gobble
\else
\@escapeif\forest@cotu@nospaceB
\fi
}
\def\forest@cotu@nospaceB#1{%
\ifcat#1a%
\let\forest@cotu@next\forest@cotu@have@alpha
\else
\if!\ifnum9<1#1!\fi
\let\forest@cotu@next\forest@cotu@have@num
\else
\let\forest@cotu@next\forest@cotu@haveother
\fi
\fi
\forest@cotu@next#1%
}
\def\forest@cotu@have@alpha#1{%
\appto\forest@cotu@result{#1}%
\forest@cotu
}
\def\forest@cotu@haveother#1{%
\appto\forest@cotu@result{_}%
\forest@cotu
}
% \end{macrocode}
%
% Additional list macros.
% \begin{macrocode}
\def\forest@listedel#1#2{% #1 = list, #2 = item
\edef\forest@marshal{\noexpand\forest@listdel\noexpand#1{#2}}%
\forest@marshal
}
\def\forest@listcsdel#1#2{%
\expandafter\forest@listdel\csname #1\endcsname{#2}%
}
\def\forest@listcsedel#1#2{%
\expandafter\forest@listedel\csname #1\endcsname{#2}%
}
\edef\forest@restorelistsepcatcode{\noexpand\catcode`|\the\catcode`|\relax}%
\catcode`\|=3
\gdef\forest@listdel#1#2{%
\def\forest@listedel@A##1|#2|##2\forest@END{%
\forest@listedel@B##1|##2\forest@END%|
}%
\def\forest@listedel@B|##1\forest@END{%|
\def#1{##1}%
}%
\expandafter\forest@listedel@A\expandafter|#1\forest@END%|
}
\forest@restorelistsepcatcode
% \end{macrocode}
%
% Strip (the first level of) braces from all the tokens in the argument.
% \begin{macrocode}
\def\forest@strip@braces#1{%
\forest@strip@braces@A#1\forest@strip@braces@preend\forest@strip@braces@end
}
\def\forest@strip@braces@A#1#2\forest@strip@braces@end{%
#1\ifx\forest@strip@braces@preend#2\else\@escapeif{\forest@strip@braces@A#2\forest@strip@braces@end}\fi
}
% \end{macrocode}
%
% Utilities dealing with pgfkeys.
% \begin{macrocode}
\def\forest@copycommandkey#1#2{% copies command of #1 into #2
\pgfkeysifdefined{#1/.@cmd}{}{%
\PackageError{forest}{Key #1 is not a command key}{}%
}%
\pgfkeysgetvalue{#1/.@cmd}\forest@temp
\pgfkeyslet{#2/.@cmd}\forest@temp
\pgfkeysifdefined{#1/.@args}{%
\pgfkeysgetvalue{#1/.@args}\forest@temp
\pgfkeyslet{#2/.@args}\forest@temp
}{}%
\pgfkeysifdefined{#1/.@body}{%
\pgfkeysgetvalue{#1/.@body}\forest@temp
\pgfkeyslet{#2/.@body}\forest@temp
}{}%
\pgfkeysifdefined{#1/.@@body}{%
\pgfkeysgetvalue{#1/.@@body}\forest@temp
\pgfkeyslet{#2/.@@body}\forest@temp
}{}%
\pgfkeysifdefined{#1/.@def}{%
\pgfkeysgetvalue{#1/.@def}\forest@temp
\pgfkeyslet{#2/.@def}\forest@temp
}{}%
}
\forestset{
copy command key/.code 2 args={\forest@copycommandkey{#1}{#2}},
autoforward/.code 2 args={\forest@autoforward{#1}{#2={#1={##1}}}{true}},
autoforward'/.code 2 args={\forest@autoforward{#1}{#2-=#1,#2={#1={##1}}}{true}},
Autoforward/.code 2 args={\forest@autoforward{#1}{#2}{true}},
autoforward register/.code 2 args={\forest@autoforward{#1}{#2={#1={##1}}}{false}},
autoforward register'/.code 2 args={\forest@autoforward{#1}{#2-=#1,#2={#1={##1}}}{false}},
Autoforward register/.code 2 args={\forest@autoforward{#1}{#2}{false}},
copy command key@if it exists/.code 2 args={%
\pgfkeysifdefined{#1/.@cmd}{%
\forest@copycommandkey{#1}{#2}%
}{}%
},
unautoforward/.style={
typeout={unautoforwarding #1},
copy command key@if it exists={/forest/autoforwarded #1}{/forest/#1},
copy command key@if it exists={/forest/autoforwarded #1+}{/forest/#1+},
copy command key@if it exists={/forest/autoforwarded #1-}{/forest/#1-},
copy command key@if it exists={/forest/autoforwarded #1*}{/forest/#1*},
copy command key@if it exists={/forest/autoforwarded #1:}{/forest/#1:},
copy command key@if it exists={/forest/autoforwarded #1'}{/forest/#1'},
copy command key@if it exists={/forest/autoforwarded #1+'}{/forest/#1+'},
copy command key@if it exists={/forest/autoforwarded #1-'}{/forest/#1-'},
copy command key@if it exists={/forest/autoforwarded #1*'}{/forest/#1*'},
copy command key@if it exists={/forest/autoforwarded #1:'}{/forest/#1:'},
copy command key@if it exists={/forest/autoforwarded +#1}{/forest/+#1},
},
/handlers/.undef/.code={\csundef{pgfk@\pgfkeyscurrentpath}},
undef option/.style={
/forest/#1/.undef,
/forest/#1/.@cmd/.undef,
/forest/#1+/.@cmd/.undef,
/forest/#1-/.@cmd/.undef,
/forest/#1*/.@cmd/.undef,
/forest/#1:/.@cmd/.undef,
/forest/#1'/.@cmd/.undef,
/forest/#1+'/.@cmd/.undef,
/forest/#1-'/.@cmd/.undef,
/forest/#1*'/.@cmd/.undef,
/forest/#1:'/.@cmd/.undef,
/forest/+#1/.@cmd/.undef,
/forest/TeX={\patchcmd{\forest@node@init}{\forestoinit{#1}}{}{}{}},
},
undef register/.style={undef option={#1}},
}
\def\forest@autoforward#1#2#3{%
% #1 = option name
% #2 = code of a style taking one arg (new option value),
% which expands to whatever should be done with the new value
% autoforward(') adds to the keylist (arg#2)
% #3 = true=option, false=register
\forest@autoforward@createforwarder{}{#1}{}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{+}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{-}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{*}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{:}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{'}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{+'}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{-'}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{*'}{#2}{#3}%
\forest@autoforward@createforwarder{}{#1}{:'}{#2}{#3}%
\forest@autoforward@createforwarder{+}{#1}{}{#2}{#3}%
}
\def\forest@autoforward@createforwarder#1#2#3#4#5{%
% #1=prefix, #2=option name, #3=suffix, #4=macro code (#2 above), #5=option or register
\pgfkeysifdefined{/forest/#1#2#3/.@cmd}{%
\forest@copycommandkey{/forest/#1#2#3}{/forest/autoforwarded #1#2#3}%
\pgfkeyssetvalue{/forest/autoforwarded #1#2#3/option@name}{#2}%
\pgfkeysdef{/forest/#1#2#3}{%
\pgfkeysalso{autoforwarded #1#2#3={##1}}%
\def\forest@temp@macro####1{#4}%
\csname forest@temp#5\endcsname
\edef\forest@temp@value{\ifforest@temp\expandafter\forestOv\expandafter{\expandafter\forest@setter@node\expandafter}\else\expandafter\forestrv\fi{#2}}%
%\expandafter\expandafter\expandafter\pgfkeysalso\expandafter\expandafter\expandafter{\expandafter\forest@temp@macro\expandafter{\forest@temp@value}}% ??? how many expansions are really needed?
\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfkeysalso\expandafter\expandafter\expandafter{\expandafter\forest@temp@macro\expandafter{\forest@temp@value}}%
}%
}{}%
}
\def\forest@node@removekeysfromkeylist#1#2{% #1 = keys to remove, #2 = option name
\edef\forest@marshal{%
\noexpand\forest@removekeysfromkeylist{\unexpanded{#1}}{\forestov{#2}}\noexpand\forest@temp@toks}\forest@marshal
\forestoeset{#2}{\the\forest@temp@toks}%
}
\def\forest@removekeysfromkeylist#1#2#3{%
% #1 = keys to remove (a keylist: an empty value means remove a key with any value)
% #2 = keylist
% #3 = toks cs for result
\forest@temp@toks{}%
\def\forestnovalue{\forestnovalue}%
\pgfqkeys{/forest/remove@key@installer}{#1}%
\let\forestnovalue\pgfkeysnovaluetext
\pgfqkeys{/forest/remove@key}{#2}%
\pgfqkeys{/forest/remove@key@uninstaller}{#1}%
#3\forest@temp@toks
}
\def\forest@remove@key@novalue{\forest@remove@key@novalue}%
\forestset{
remove@key@installer/.unknown/.code={% #1 = (outer) value
\def\forest@temp{#1}%
\ifx\forest@temp\pgfkeysnovalue@text
\pgfkeysdef{/forest/remove@key/\pgfkeyscurrentname}{}%
\else
\ifx\forest@temp\forestnovalue
\expandafter\forest@remove@key@installer@defwithvalue\expandafter{\pgfkeyscurrentname}{\pgfkeysnovalue}%
\else
\expandafter\forest@remove@key@installer@defwithvalue\expandafter{\pgfkeyscurrentname}{#1}%
\fi
\fi
},
remove@key/.unknown/.code={% #1 = (inner) value
\expandafter\apptotoks\expandafter\forest@temp@toks\expandafter{\pgfkeyscurrentname={#1},}%
},
remove@key@uninstaller/.unknown/.code={%
\pgfkeyslet{/forest/remove@key/\pgfkeyscurrentname/.@cmd}\@undefined},
}
\def\forest@remove@key@installer@defwithvalue#1#2{% #1=key name, #2 = outer value
\pgfkeysdef{/forest/remove@key/#1}{% ##1 = inner value
\def\forest@temp@outer{#2}%
\def\forest@temp@inner{##1}%
\ifx\forest@temp@outer\forest@temp@inner
\else
\apptotoks\forest@temp@toks{#1={##1},}%
\fi
}%
}
\forestset{
show register/.code={%
\forestrget{#1}\foresttemp
\typeout{Forest register "#1"=\expandafter\detokenize\expandafter{\foresttemp}}%
},
}
% \end{macrocode}
% \subsection{Arrays}
%
% \begin{macrocode}
\def\forest@newarray#1{%
\forest@tempfalse % non-global
{%
\escapechar=-1
\expandafter\escapechar\expandafter\count@\expandafter
}%
\expandafter\forest@newarray@\expandafter{\string#1}%
}
\def\forest@newglobalarray#1{%
\forest@temptrue % global
{%
\escapechar=-1
\expandafter\escapechar\expandafter\count@\expandafter
}%
\expandafter\forest@newarray@\expandafter{\string#1}%
}
\def\forest@array@empty@error#1{%
\PackageError{forest}{Cannot pop from empty array "#1".}{}}%
\def\forest@array@oub@error#1#2{%
\PackageError{forest}{#2 is out of bounds of array "#1"
(\the\csuse{#1M}--\the\csuse{#1N}).}{}}%
% \end{macrocode}
% Define array macros. For speed, we define most of them to be ``direct'', i.e.\ cointain the resolved control sequences specific to this array.
% \begin{macrocode}
\def\forest@newarray@#1{%
% array bounds: M <= i < N
\expandafter\newcount\csname#1M\endcsname
\expandafter\newcount\csname#1N\endcsname
\csedef{#1clear}{%
\ifforest@temp\global\fi\expandonce{\csname#1M\endcsname}0
\ifforest@temp\global\fi\expandonce{\csname#1N\endcsname}0
}%
\csedef{#1ifempty}{%
\noexpand\ifnum\expandonce{\csname#1M\endcsname}<\expandonce{\csname#1N\endcsname}\relax
\unexpanded{\expandafter\@secondoftwo
\else
\expandafter\@firstoftwo
\fi}%
}%
\csedef{#1length}{% a numexpr
\noexpand\numexpr\expandonce{\csname#1N\endcsname}-\expandonce{\csname#1M\endcsname}\relax
}%
\csedef{#1checkrange}##1##2{% args can be \numexprs
\noexpand\forest@tempfalse
\noexpand\ifnum\numexpr##1<\expandonce{\csname#1M\endcsname}\relax
\noexpand\forest@temptrue
\noexpand\fi
\noexpand\ifnum\numexpr##2>\expandonce{\csname#1N\endcsname}\relax
\noexpand\forest@temptrue
\noexpand\fi
\noexpand\ifforest@temp
\noexpand\forest@array@oub@error{#1}{Range "\noexpand\number\noexpand\numexpr##1\relax--\noexpand\number\noexpand\numexpr##2\relax"}%
\noexpand\fi
}%
\csedef{#1checkindex}##1{% arg can be a \numexpr
\noexpand\forest@tempfalse
\noexpand\ifnum\numexpr##1<\expandonce{\csname#1M\endcsname}\relax
\noexpand\forest@temptrue
\noexpand\fi
\noexpand\ifnum\numexpr##1<\expandonce{\csname#1N\endcsname}\relax
\noexpand\else
\noexpand\forest@temptrue
\noexpand\fi
\noexpand\ifforest@temp
\noexpand\forest@array@oub@error{#1}{Index "\noexpand\number\noexpand\numexpr##1\relax"}%
\noexpand\fi
}%
\csedef{#1get}##1##2{% ##1 = index, ##2 = receiving cs
\expandonce{\csname#1checkindex\endcsname}{##1}%
\noexpand\letcs##2{#1##1}%
}%
\csedef{#1get@}##1##2{% ##1 = index, ##2 = receiving cs (don't check bounds)
\noexpand\letcs##2{#1##1}%
}%
\csedef{#1toppop}##1{% ##1 = receiving cs
\expandonce{\csname#1ifempty\endcsname}{%
\noexpand\forest@array@empty@error{#1}%
}{%
\ifforest@temp\global\fi\advance\expandonce{\csname#1N\endcsname}-1
\noexpand\letcs\noexpand##1{#1\noexpand\the\expandonce{\csname#1N\endcsname}}%
}%
}%
\InlineNoDef{\csdef{#1bottompop}##1{% ##1 = receiving cs
\Expand{\csname#1ifempty\endcsname}{%
\forest@array@empty@error{#1}%
}{%
\letcs##1{#1\the\Expand{\csname#1M\endcsname}}%
\ExpandIfT{forest@temp}\global\advance\Expand{\csname#1M\endcsname 1}%
}%
}}%
% \csdef{#1bottompop}##1{}% we need this as \Inline chokes on \let\macro=\relax
% \expandafter\Inline\expandafter\def\csname#1bottompop\endcsname##1{% ##1 = receiving cs
% \Expand{\csname#1ifempty\endcsname}{%
% \forest@array@empty@error{#1}%
% }{%
% \letcs##1{#1\the\Expand{\csname#1M\endcsname}}%
% \ExpandIfT{forest@temp}\global\advance\Expand{\csname#1M\endcsname 1}%
% }%
% }%
% \csedef{#1bottompop}##1{% ##1 = receiving cs
% \expandonce{\csname#1ifempty\endcsname}{%
% \noexpand\forest@array@empty@error{#1}%
% }{%
% \noexpand\letcs\noexpand##1{#1\noexpand\the\expandonce{\csname#1M\endcsname}}%
% \ifforest@temp\global\fi\advance\expandonce{\csname#1M\endcsname}1
% }%
% }%
\csedef{#1setappend}##1{% ##1 = definition
\ifforest@temp\noexpand\csxdef\else\noexpand\csedef\fi
{#1\noexpand\the\expandonce{\csname#1N\endcsname}}%
{\noexpand\unexpanded{##1}}%
\ifforest@temp\global\fi\advance\expandonce{\csname#1N\endcsname}1
}%
\csedef{#1setappend@}##1##2{% ##1 = continue by, ##2 = definition
\ifforest@temp\noexpand\csxdef\else\noexpand\csedef\fi
{#1\noexpand\the\expandonce{\csname#1N\endcsname}}%
{\noexpand\unexpanded{##2}}%
\ifforest@temp\global\fi\advance\expandonce{\csname#1N\endcsname}1
##1%
}%
\csedef{#1setprepend}##1{% ##1 = definition
\ifforest@temp\global\fi\advance\expandonce{\csname#1M\endcsname}-1
\ifforest@temp\noexpand\csxdef\else\noexpand\csedef\fi
{#1\noexpand\the\expandonce{\csname#1M\endcsname}}%
{\noexpand\unexpanded{##1}}%
}%
\csedef{#1esetappend}##1{% ##1 = definition
\ifforest@temp\noexpand\csxdef\else\noexpand\csedef\fi{#1\noexpand\the\expandonce{\csname#1N\endcsname}}{##1}%
\ifforest@temp\global\fi\advance\expandonce{\csname#1N\endcsname}1
}%
\csedef{#1esetprepend}##1{% ##1 = definition
\ifforest@temp\global\fi\advance\expandonce{\csname#1M\endcsname}-1
\ifforest@temp\noexpand\csxdef\else\noexpand\csedef\fi{#1\noexpand\the\expandonce{\csname#1M\endcsname}}{##1}%
}%
\csedef{#1letappend}##1{% ##1 = cs
\ifforest@temp\noexpand\expandafter\noexpand\global\fi\noexpand\expandafter\noexpand\let
\noexpand\csname#1\noexpand\the\expandonce{\csname#1N\endcsname}\noexpand\endcsname
##1%
\ifforest@temp\global\fi\advance\expandonce{\csname#1N\endcsname}1
}%
\csedef{#1letprepend}##1{% ##1 = cs
\ifforest@temp\global\fi\advance\expandonce{\csname#1M\endcsname}-1
\ifforest@temp\noexpand\expandafter\noexpand\global\fi\noexpand\expandafter\noexpand\let
\noexpand\csname#1\noexpand\the\expandonce{\csname#1M\endcsname}\noexpand\endcsname
##1%
}%
% \end{macrocode}
% I would love to define these only generically, as they will not be called often, but they need to be expandable. Argh.
% right?
% \begin{lstlisting}
% \def\arrayvalues{% <-- \csedef{#1values}
% \expandafter\expandafter\expandafter\arrayvaluesfromrange %\arrayvaluesfromrange <-- \expandonce{\csname#1valuesfromrange\endcsname}
% \expandafter\expandafter\expandafter{%
% \expandafter\the
% \expandafter\arrayM %\arrayM <-- \expandonce{\csname#1M\endcsname}%
% \expandafter}%
% \expandafter{%
% \the\arrayN %\arrayN <-- \expandonce{\csname#1N\endcsname}%
% }%
% }%
% \end{lstlisting}
% \begin{macrocode}
\csedef{#1values}{%
\noexpand\expandafter\noexpand\expandafter\noexpand\expandafter\expandonce{\csname#1valuesfromrange\endcsname}%
\noexpand\expandafter\noexpand\expandafter\noexpand\expandafter{%
\noexpand\expandafter\noexpand\the
\noexpand\expandafter\expandonce{\csname#1M\endcsname}%
\noexpand\expandafter}%
\noexpand\expandafter{\noexpand\the\expandonce{\csname#1N\endcsname}}%
}%
% \end{macrocode}
% \begin{lstlisting}
% \def\arrayvaluesfromrange##1##2{% ##1/##2 = lower/upper bounds (we receive them expanded) <-- \csedef{#1vuesfromrange}
% \ifnum##1<##2
% {\expandafter\expandonce\expandafter{\csname#1##1\endcsname}}% here we add braces (for the general case, we might want an arbitrary prefix&suffix)
% \expandafter\@escapeif\expandafter{\expandafter\arrayvaluesfromrange % <-- \expandonce{\csname#1valuesfromrange\endcsname}%
% \expandafter{\number\numexpr##1+1}{##2}}%
% \fi
% }%
% \end{lstlisting}
% As we need this to be expandable, we cannot check the range within the macro. You need to to this on your own using |...checkrange| defined above.
% \begin{macrocode}
\csedef{#1valuesfromrange}##1##2{% ##1/##2 = lower/upper bounds (we receive them expanded)
\noexpand\ifnum##1<##2
{\noexpand\expandafter\noexpand\expandonce\noexpand\expandafter{\noexpand\csname#1##1\noexpand\endcsname}}% here we add braces (for the general case, we might want an arbitrary prefix&suffix)
\noexpand\expandafter\noexpand\@escapeif\noexpand\expandafter{\noexpand\expandafter\expandonce{\csname#1valuesfromrange\endcsname}%
\noexpand\expandafter{\noexpand\number\noexpand\numexpr##1+1}{##2}}%
\noexpand\fi
}%
% \end{macrocode}
% Puts all items until |\forest@eov| into the array. After that is done, execute |\forest@topextend@next| (Why this macro? So that we can extend the array by tokens never seen before.). This code is difficult and not run often, so it doesn't need specialized control sequences.
% \begin{macrocode}
\csdef{#1topextend}{\def\forest@array@currentarray{#1}\forest@array@topextend}%
}
\def\forest@array@topextend{\futurelet\forest@ate@next@token\forest@ate@checkforspace}
\def\forest@ate@checkforspace{%
\expandafter\ifx\space\forest@ate@next@token
\expandafter\forest@ate@havespace
\else
\expandafter\forest@ate@checkforgroup
\fi
}
\def\forest@ate@havespace{\expandafter\forest@array@topextend\romannumeral-`0}%
\def\forest@ate@checkforgroup{%
\ifx\forest@ate@next@token\bgroup
\expandafter\forest@ate@appendgroup
\else
\expandafter\forest@ate@checkforeov
\fi
}
\def\forest@ate@appendgroup{%
\expandonce{\csname\forest@array@currentarray setappend@\endcsname}\forest@array@topextend
}
\def\forest@ate@checkforeov{%
\ifx\forest@ate@next@token\forest@eov
\expandafter\forest@ate@finish
\else
\expandafter\forest@ate@appendtoken
\fi
}
\def\forest@ate@appendtoken#1{%
\expandonce{\csname\forest@array@currentarray setappend\endcsname}{#1}%
\forest@array@topextend
}
\def\forest@ate@finish\forest@eov{\forest@topextend@next}
\let\forest@topextend@next\relax
\forest@newarray\forest@temparray@
\forest@newglobalarray\forest@global@temparray@
% \end{macrocode}
%
%
% \subsection{Testing for numbers and dimensions}
% \label{sec:is-count-or-dimen}
%
% Test if the argument is an integer (only base 10) that can be assigned to a \TeX\ count register.
% This is supposed to be a fast, not complete test, as anything not recognized as an integer will be
% passed on to |pgfmath| (by the code that uses these macros).
%
% We support |+|s, |-|s and spaces before the number. We don't support count registers.
%
% Dillema? Should |0abc| be interpreted as \TeX\ style (decimal) or PGF style (octal)? We go for
% \TeX\ style.
%
% The return value will hide in \TeX-style |\if|-macro |\forest@isnum| and counter |\forest@isnum@count|.
%
% \begin{macrocode}
\def\forest@eon{ }
\newif\ifforest@isnum@minus
\newif\ifforest@isnum
\def\forest@isnum#1{%
\forest@isnum@minusfalse
\let\forest@isnum@next\forest@isnum@finish
% \end{macrocode}
% Expand in advance, like pgfmath does.
% \begin{macrocode}
\edef\forest@isnum@temp{#1}%
% \end{macrocode}
% Add two end-of-value markers. The first one might be eaten by count assignment: that's why there
% are two and they expand to a space.
% \begin{macrocode}
\expandafter\forest@isnum@a\forest@isnum@temp\forest@eon\forest@eon\forest@END
\ifforest@isnum
\expandafter\@firstoftwo
\else
\expandafter\@secondoftwo
\fi
}
\def\forest@isnum@a{\futurelet\forest@isnum@token\forest@isnum@b}
% \end{macrocode}
% Test for three special characters: |-|, |+|, and space.
% \begin{macrocode}
\def\forest@isnum@minustoggle{%
\ifforest@isnum@minus\forest@isnum@minusfalse\else\forest@isnum@minustrue\fi
}
\def\forest@isnum@b{%
\let\forest@next\forest@isnum@p
\ifx-\forest@isnum@token
\forest@isnum@minustoggle
\let\forest@next\forest@isnum@c
\else
\ifx+\forest@isnum@token
\let\forest@next\forest@isnum@c
\else
\expandafter\ifx\space\forest@isnum@token
\let\forest@next\forest@isnum@s
\fi
\fi
\fi
\forest@next
}
% \end{macrocode}
% Eat |+| and |-|.
% \begin{macrocode}
\def\forest@isnum@c#1{\forest@isnum@a}%
% \end{macrocode}
% Eat the space!
% \begin{macrocode}
\def\forest@isnum@s#1{\forest@isnum@a#1}%
\newcount\forest@isnum@count
% \end{macrocode}
% Check for |0|. Why? If we have one, we know that the initial argument started with a number, so
% we have a chance that it is a number even if our assignment will yield $0$. If we have no |0| and the assignment yields $0$, we know we don't have a number.
% \begin{macrocode}
\def\forest@isnum@p{%
\ifx0\forest@isnum@token
\let\forest@next\forest@isnum@next
\else
\let\forest@next\forest@isnum@nz@
\fi
\forest@isnumtrue
\afterassignment\forest@isnum@q\forest@isnum@count\ifforest@isnum@minus-\fi0%
}
\def\forest@isnum@q{%
\futurelet\forest@isnum@token\forest@next
}
\def\forest@isnum@nz@{%
\ifnum\forest@isnum@count=0
\forest@isnumfalse
\fi
\forest@isnum@next
}
% \end{macrocode}
% This is the end of testing for an integer. If we have left-over stuff (|#1|), this was not a number.
% \begin{macrocode}
\def\forest@isnum@finish#1\forest@END{%
\ifx\forest@isnum@token\forest@eon
\else
\forest@isnumfalse
\fi