Change function argument globally in renewcommand

Question

I want to set one argument of a function permanently to a specific value. In my case it is the function \TextField which has the argument bordercolor. I want to set it globally to "nothing" instead of writing \TextField[bordercolor=,name=xyz] everytime. This was my attempt which leads to an error: \renewcommand{\TextField}{\TextField[bordercolor=]}

score 2 · Accepted Answer · answered Aug 06 '19 at 12:15

2

\documentclass{article}
\usepackage{xcolor}
\usepackage{hyperref}
\let\TEXTFIELD\TextField
\renewcommand\TextField[1][]{\TEXTFIELD[bordercolor=,#1]}

\begin{document}
\begin{Form}
\TextField[name=xy]{foo}
\TextField[bordercolor=red,name=xy]{bar}
\end{Form}
\end{document}

answered Aug 06 '19 at 12:15

user187802

16,850

Thank you, works fine! Could you explain line 4 and 5 and why you need "TEXTFIELD"? – TobiSonne Aug 06 '19 at 12:24
It holds the original definition of \TextField. We need it to prevent a recursion. – user187802 Aug 06 '19 at 12:28
2

Since \TextField is defined with \DeclareRobustCommand, \let\TEXTFIELD\TextField is dangerous. Load \usepackage{letltxmacro} and do \LetLtxMacro\TEXTFIELD\TextField instead. See When to use \LetLtxMacro. – egreg Aug 06 '19 at 12:55

Ulrike Fischer · Answer 2 · 2019-08-06T12:48:55.047

hyperref has a command to which you can append default keys for the textfield (by default it contains only "print"):

\documentclass{article}
\usepackage{xcolor}
\usepackage{hyperref}
\usepackage{etoolbox}
\apptocmd\DefaultOptionsofText{,bordercolor=}{}{\fail}

\begin{document}
\begin{Form}
\TextField[name=xy]{foo}
\TextField[bordercolor=red,name=xy]{bar}
\end{Form}
\end{document}

The alternative is to simply set the key with \kvsetkeys (this will affect the border of other field types too):

\documentclass{article}
\usepackage{xcolor}
\usepackage{hyperref}


\begin{document}
\begin{Form}
\kvsetkeys{Field}{bordercolor=}

\TextField[name=x]{foo}
\TextField[bordercolor=red,name=y]{bar}


\end{Form}
\end{document}

Change function argument globally in renewcommand

2 Answers2