Mrthfx

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Problem patching by appending to footnote command. “Missing endcsname inserted”

Please tutor the usage of patchcmd and xpatchsame command with output X in main body and Y in footnoteDetect whether I'm in a footnote?footnote boolean: how to check whether currently in a footnoteHow to test if I'm currently in a footnote or notGetting those %#!^& signs in the footnote!error when patching with etoolbox apptocmd: “the patching command seems to be nested in the argument to some other command”Does \* within footnotes have any effect?Does LaTeX3 have something for patching (or appending code to) commands?Epigraph and fancyhdr: a patching problemWhy won't my boolean work correctly?Problem with footnoteParacol package creates endcsname error with footnotesregexpatch xpatchcmd fails in patching command begins with spaceA problem with footnote - missing number, treated as zero

0

I want to test whether a macro is (a) outside or (b) inside a footnote command, similar to what's asked in (i) How to test if I'm currently in a footnote or not, (ii) Detect whether I'm in a footnote?, (iii) footnote boolean: how to check whether currently in a footnote, and (iv) same command with output X in main body and Y in footnote.

The general technique is (1) define a boolean, defaulted to false; (2) redefine footnote so that it sets the boolean to true upon entry and resets it to false when exiting. This requires a prepending and an appending to the original footnote command.

Where my question differs from the answers given for (i)–(iii) above is that they all do the redefinition with a let. However, though it's often forgotten, the footnote command takes an optional argument (for the number of the footnote). (E.g., see "footnote" of LaTeX2e unofficial reference manual (October 2018).) This fact should make using let inappropriate. (E.g., "Remember that one must never use the old trick letORIxyzxzy… if xyz has been defined with an optional argument." xpatch documentation)

(The answer in (iv) redefines footnotetext rather than footnote, which I don't understand.)

Thus, I want to redefine footnote using the commands xpretocmd and xapptocmd from the xpatch package (to prepend and append, respectively). (See Enrico's helpful explanation.)

The below MWE is my attempt to solve this problem.

If I comment out the appending xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{}{} command, it works well (except for the obvious problem that it doesn't reset the boolean to false and, hence, thinks it's in the footnote even after it's exited). See this output:

But when I leave the appending command uncommented, (a) it fails to reset the boolean and (b) the output falls apart both in the body text and in the footnote text, and (c) I get the error, associated with the footnote commands itself:

Missing endcsname inserted.

unskip
I.38 footnote
[Here's the footnote:amIInAFootnote]
The control sequence marked should not appear between csname and endcsname.

Here's the output:

Where am I going wrong?

Here's the MWE:

documentclass{article}

usepackage{xcolor}

usepackage{xpatch}

usepackage{etoolbox}



newtoggle{inFootnoteCommand}

togglefalse{inFootnoteCommand}



newcommand{amIInAFootnote}{%

    iftoggle{inFootnoteCommand}{%

        textcolor{blue}{You are in a footnote.}

    }{%

        textcolor{red}{You are NOT in a footnote.}

    }%

}



parindent=0pt



begin{document}

This line intentionally left blank %To move the text closer to the footnote

vspace{400pt}



xpretocmd{footnote}{toggletrue{inFootnoteCommand}}{SUCCESS\}{FAIL\}

xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{SUCCESS\}{FAIL\}



Before a footnote: amIInAFootnote.



At the end of this sentence is a footnote:%

    footnote{Here’s the footnote: amIInAFootnote}



Now, I'm back from the footnote: amIInAFootnote

end{document}

footnotes etoolbox xpatch

share

asked 5 mins ago

Jim RatliffJim Ratliff

5071411

add a comment | 

0

I want to test whether a macro is (a) outside or (b) inside a footnote command, similar to what's asked in (i) How to test if I'm currently in a footnote or not, (ii) Detect whether I'm in a footnote?, (iii) footnote boolean: how to check whether currently in a footnote, and (iv) same command with output X in main body and Y in footnote.

The general technique is (1) define a boolean, defaulted to false; (2) redefine footnote so that it sets the boolean to true upon entry and resets it to false when exiting. This requires a prepending and an appending to the original footnote command.

Where my question differs from the answers given for (i)–(iii) above is that they all do the redefinition with a let. However, though it's often forgotten, the footnote command takes an optional argument (for the number of the footnote). (E.g., see "footnote" of LaTeX2e unofficial reference manual (October 2018).) This fact should make using let inappropriate. (E.g., "Remember that one must never use the old trick letORIxyzxzy… if xyz has been defined with an optional argument." xpatch documentation)

(The answer in (iv) redefines footnotetext rather than footnote, which I don't understand.)

Thus, I want to redefine footnote using the commands xpretocmd and xapptocmd from the xpatch package (to prepend and append, respectively). (See Enrico's helpful explanation.)

The below MWE is my attempt to solve this problem.

If I comment out the appending xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{}{} command, it works well (except for the obvious problem that it doesn't reset the boolean to false and, hence, thinks it's in the footnote even after it's exited). See this output:

But when I leave the appending command uncommented, (a) it fails to reset the boolean and (b) the output falls apart both in the body text and in the footnote text, and (c) I get the error, associated with the footnote commands itself:

Missing endcsname inserted.

unskip
I.38 footnote
[Here's the footnote:amIInAFootnote]
The control sequence marked should not appear between csname and endcsname.

Here's the output:

Where am I going wrong?

Here's the MWE:

documentclass{article}

usepackage{xcolor}

usepackage{xpatch}

usepackage{etoolbox}



newtoggle{inFootnoteCommand}

togglefalse{inFootnoteCommand}



newcommand{amIInAFootnote}{%

    iftoggle{inFootnoteCommand}{%

        textcolor{blue}{You are in a footnote.}

    }{%

        textcolor{red}{You are NOT in a footnote.}

    }%

}



parindent=0pt



begin{document}

This line intentionally left blank %To move the text closer to the footnote

vspace{400pt}



xpretocmd{footnote}{toggletrue{inFootnoteCommand}}{SUCCESS\}{FAIL\}

xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{SUCCESS\}{FAIL\}



Before a footnote: amIInAFootnote.



At the end of this sentence is a footnote:%

    footnote{Here’s the footnote: amIInAFootnote}



Now, I'm back from the footnote: amIInAFootnote

end{document}

footnotes etoolbox xpatch

share

asked 5 mins ago

Jim RatliffJim Ratliff

5071411

add a comment | 

I want to test whether a macro is (a) outside or (b) inside a footnote command, similar to what's asked in (i) How to test if I'm currently in a footnote or not, (ii) Detect whether I'm in a footnote?, (iii) footnote boolean: how to check whether currently in a footnote, and (iv) same command with output X in main body and Y in footnote.

The general technique is (1) define a boolean, defaulted to false; (2) redefine footnote so that it sets the boolean to true upon entry and resets it to false when exiting. This requires a prepending and an appending to the original footnote command.

Where my question differs from the answers given for (i)–(iii) above is that they all do the redefinition with a let. However, though it's often forgotten, the footnote command takes an optional argument (for the number of the footnote). (E.g., see "footnote" of LaTeX2e unofficial reference manual (October 2018).) This fact should make using let inappropriate. (E.g., "Remember that one must never use the old trick letORIxyzxzy… if xyz has been defined with an optional argument." xpatch documentation)

(The answer in (iv) redefines footnotetext rather than footnote, which I don't understand.)

Thus, I want to redefine footnote using the commands xpretocmd and xapptocmd from the xpatch package (to prepend and append, respectively). (See Enrico's helpful explanation.)

The below MWE is my attempt to solve this problem.

If I comment out the appending xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{}{} command, it works well (except for the obvious problem that it doesn't reset the boolean to false and, hence, thinks it's in the footnote even after it's exited). See this output:

But when I leave the appending command uncommented, (a) it fails to reset the boolean and (b) the output falls apart both in the body text and in the footnote text, and (c) I get the error, associated with the footnote commands itself:

Missing endcsname inserted.

unskip
I.38 footnote
[Here's the footnote:amIInAFootnote]
The control sequence marked should not appear between csname and endcsname.

Here's the output:

Where am I going wrong?

Here's the MWE:

documentclass{article}

usepackage{xcolor}

usepackage{xpatch}

usepackage{etoolbox}



newtoggle{inFootnoteCommand}

togglefalse{inFootnoteCommand}



newcommand{amIInAFootnote}{%

    iftoggle{inFootnoteCommand}{%

        textcolor{blue}{You are in a footnote.}

    }{%

        textcolor{red}{You are NOT in a footnote.}

    }%

}



parindent=0pt



begin{document}

This line intentionally left blank %To move the text closer to the footnote

vspace{400pt}



xpretocmd{footnote}{toggletrue{inFootnoteCommand}}{SUCCESS\}{FAIL\}

xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{SUCCESS\}{FAIL\}



Before a footnote: amIInAFootnote.



At the end of this sentence is a footnote:%

    footnote{Here’s the footnote: amIInAFootnote}



Now, I'm back from the footnote: amIInAFootnote

end{document}

footnotes etoolbox xpatch

share

asked 5 mins ago

Jim RatliffJim Ratliff

5071411

documentclass{article}

usepackage{xcolor}

usepackage{xpatch}

usepackage{etoolbox}



newtoggle{inFootnoteCommand}

togglefalse{inFootnoteCommand}



newcommand{amIInAFootnote}{%

    iftoggle{inFootnoteCommand}{%

        textcolor{blue}{You are in a footnote.}

    }{%

        textcolor{red}{You are NOT in a footnote.}

    }%

}



parindent=0pt



begin{document}

This line intentionally left blank %To move the text closer to the footnote

vspace{400pt}



xpretocmd{footnote}{toggletrue{inFootnoteCommand}}{SUCCESS\}{FAIL\}

xapptocmd{footnote}{togglefalse{inFootnoteCommand}}{SUCCESS\}{FAIL\}



Before a footnote: amIInAFootnote.



At the end of this sentence is a footnote:%

    footnote{Here’s the footnote: amIInAFootnote}



Now, I'm back from the footnote: amIInAFootnote

end{document}

share

asked 5 mins ago

Jim RatliffJim Ratliff

5071411

share

asked 5 mins ago

Jim RatliffJim Ratliff

5071411

asked 5 mins ago

Jim RatliffJim Ratliff

5071411

asked 5 mins ago

Jim RatliffJim Ratliff

5071411