[Tex/LaTex] latexdiff don’t work in table with \scalebox

latexdiff

When revise my manuscript, I found latexdiff can't label changes in tables. For example, there are two tex files before and after revision:

Before revision

\documentclass{article}
\usepackage{graphicx}

\begin{document}
    \begin{table}
        \centering
        \caption{Example}
        \scalebox{0.8}{\begin{tabular}{lcc}
            A & 1 & 1 \\
            B & 2 & 2 \\
        \end{tabular}}
    \end{table}
\end{document}

After revision

\documentclass{article}
\usepackage{graphicx}

  \begin{document}
        \begin{table}
            \centering
            \caption{New Example}
            \scalebox{0.8}{
            \begin{tabular}{lcc}
                C & 3 & 3 \\
                D & 4 & 4 \\
            \end{tabular}}
        \end{table}
  \end{document}

The diff.tex is followed:

\documentclass{article}
%DIF LATEXDIFF DIFFERENCE FILE
%DIF DEL old.tex   Thu Mar  7 08:20:20 2019
%DIF ADD new.tex   Thu Mar  7 08:19:50 2019
\usepackage{graphicx}
%DIF PREAMBLE EXTENSION ADDED BY LATEXDIFF
%DIF UNDERLINE PREAMBLE %DIF PREAMBLE
\RequirePackage[normalem]{ulem} %DIF PREAMBLE
\RequirePackage{color}\definecolor{RED}{rgb}{1,0,0}\definecolor{BLUE}{rgb}{0,0,1} %DIF PREAMBLE
\providecommand{\DIFadd}[1]{{\protect\color{blue}\uwave{#1}}} %DIF PREAMBLE
\providecommand{\DIFdel}[1]{{\protect\color{red}\sout{#1}}}                      %DIF PREAMBLE
%DIF SAFE PREAMBLE %DIF PREAMBLE
\providecommand{\DIFaddbegin}{} %DIF PREAMBLE
\providecommand{\DIFaddend}{} %DIF PREAMBLE
\providecommand{\DIFdelbegin}{} %DIF PREAMBLE
\providecommand{\DIFdelend}{} %DIF PREAMBLE
%DIF FLOATSAFE PREAMBLE %DIF PREAMBLE
\providecommand{\DIFaddFL}[1]{\DIFadd{#1}} %DIF PREAMBLE
\providecommand{\DIFdelFL}[1]{\DIFdel{#1}} %DIF PREAMBLE
\providecommand{\DIFaddbeginFL}{} %DIF PREAMBLE
\providecommand{\DIFaddendFL}{} %DIF PREAMBLE
\providecommand{\DIFdelbeginFL}{} %DIF PREAMBLE
\providecommand{\DIFdelendFL}{} %DIF PREAMBLE
\newcommand{\DIFscaledelfig}{0.5}
%DIF HIGHLIGHTGRAPHICS PREAMBLE %DIF PREAMBLE
\RequirePackage{settobox} %DIF PREAMBLE
\RequirePackage{letltxmacro} %DIF PREAMBLE
\newsavebox{\DIFdelgraphicsbox} %DIF PREAMBLE
\newlength{\DIFdelgraphicswidth} %DIF PREAMBLE
\newlength{\DIFdelgraphicsheight} %DIF PREAMBLE
% store original definition of \includegraphics %DIF PREAMBLE
\LetLtxMacro{\DIFOincludegraphics}{\includegraphics} %DIF PREAMBLE
\newcommand{\DIFaddincludegraphics}[2][]{{\color{blue}\fbox{\DIFOincludegraphics[#1]{#2}}}} %DIF PREAMBLE
\newcommand{\DIFdelincludegraphics}[2][]{% %DIF PREAMBLE
\sbox{\DIFdelgraphicsbox}{\DIFOincludegraphics[#1]{#2}}% %DIF PREAMBLE
\settoboxwidth{\DIFdelgraphicswidth}{\DIFdelgraphicsbox} %DIF PREAMBLE
\settoboxtotalheight{\DIFdelgraphicsheight}{\DIFdelgraphicsbox} %DIF PREAMBLE
\scalebox{\DIFscaledelfig}{% %DIF PREAMBLE
\parbox[b]{\DIFdelgraphicswidth}{\usebox{\DIFdelgraphicsbox}\\[-\baselineskip] \rule{\DIFdelgraphicswidth}{0em}}\llap{\resizebox{\DIFdelgraphicswidth}{\DIFdelgraphicsheight}{% %DIF PREAMBLE
\setlength{\unitlength}{\DIFdelgraphicswidth}% %DIF PREAMBLE
\begin{picture}(1,1)% %DIF PREAMBLE
\thicklines\linethickness{2pt} %DIF PREAMBLE
{\color[rgb]{1,0,0}\put(0,0){\framebox(1,1){}}}% %DIF PREAMBLE
{\color[rgb]{1,0,0}\put(0,0){\line( 1,1){1}}}% %DIF PREAMBLE
{\color[rgb]{1,0,0}\put(0,1){\line(1,-1){1}}}% %DIF PREAMBLE
\end{picture}% %DIF PREAMBLE
}\hspace*{3pt}}} %DIF PREAMBLE
} %DIF PREAMBLE
\LetLtxMacro{\DIFOaddbegin}{\DIFaddbegin} %DIF PREAMBLE
\LetLtxMacro{\DIFOaddend}{\DIFaddend} %DIF PREAMBLE
\LetLtxMacro{\DIFOdelbegin}{\DIFdelbegin} %DIF PREAMBLE
\LetLtxMacro{\DIFOdelend}{\DIFdelend} %DIF PREAMBLE
\DeclareRobustCommand{\DIFaddbegin}{\DIFOaddbegin \let\includegraphics\DIFaddincludegraphics} %DIF PREAMBLE
\DeclareRobustCommand{\DIFaddend}{\DIFOaddend \let\includegraphics\DIFOincludegraphics} %DIF PREAMBLE
\DeclareRobustCommand{\DIFdelbegin}{\DIFOdelbegin \let\includegraphics\DIFdelincludegraphics} %DIF PREAMBLE
\DeclareRobustCommand{\DIFdelend}{\DIFOaddend \let\includegraphics\DIFOincludegraphics} %DIF PREAMBLE
\LetLtxMacro{\DIFOaddbeginFL}{\DIFaddbeginFL} %DIF PREAMBLE
\LetLtxMacro{\DIFOaddendFL}{\DIFaddendFL} %DIF PREAMBLE
\LetLtxMacro{\DIFOdelbeginFL}{\DIFdelbeginFL} %DIF PREAMBLE
\LetLtxMacro{\DIFOdelendFL}{\DIFdelendFL} %DIF PREAMBLE
\DeclareRobustCommand{\DIFaddbeginFL}{\DIFOaddbeginFL \let\includegraphics\DIFaddincludegraphics} %DIF PREAMBLE
\DeclareRobustCommand{\DIFaddendFL}{\DIFOaddendFL \let\includegraphics\DIFOincludegraphics} %DIF PREAMBLE
\DeclareRobustCommand{\DIFdelbeginFL}{\DIFOdelbeginFL \let\includegraphics\DIFdelincludegraphics} %DIF PREAMBLE
\DeclareRobustCommand{\DIFdelendFL}{\DIFOaddendFL \let\includegraphics\DIFOincludegraphics} %DIF PREAMBLE
%DIF END PREAMBLE EXTENSION ADDED BY LATEXDIFF

\begin{document}
    \begin{table}
        \centering
        \caption{\DIFaddbeginFL \DIFaddFL{New }\DIFaddendFL Example}
        \DIFdelbeginFL %DIFDELCMD < \scalebox{0.8}{\begin{tabular}{lcc}
%DIFDELCMD <            A & 1 & 1 \\
%DIFDELCMD <            B & 2 & 2 \\
%DIFDELCMD <        \end{tabular}}
%DIFDELCMD <    %%%
\DIFdelendFL \DIFaddbeginFL \scalebox{0.8}{
        \begin{tabular}{lcc}
            C & 3 & 3 \\
            D & 4 & 4 \\
        \end{tabular}}
    \DIFaddendFL \end{table}
\end{document}

Actually, I have found the question lies on the \scalebox{}{}. If I don't use \scalebox, the diff.tex is

This is what I want.

However, when use \scalebox, it would be

But in practice my table is very wide so I have to use \scalebox. My question is, is there any method to keep table fit to text width, meanwhile make latexdiff work?

Best Answer

\scalebox is treated as an un-safe command by default, hence being commented out by %DIFDELCMD. Appending \scalebox to the list of text command seems solve your problem. Check doc of latexdiff for more info.

latexdiff --append-textcmd="scalebox" old.tex new.tex > diff.tex

Selected lines of diff.tex

\begin{document}
      \begin{table}
          \centering
          \caption{\DIFaddbeginFL \DIFaddFL{New }\DIFaddendFL Example}
          \scalebox{0.8}{
          \begin{tabular}{lcc}
              \DIFdelbeginFL \DIFdelFL{A }\DIFdelendFL \DIFaddbeginFL \DIFaddFL{C }\DIFaddendFL & \DIFdelbeginFL \DIFdelFL{1 }\DIFdelendFL \DIFaddbeginFL \DIFaddFL{3 }\DIFaddendFL & \DIFdelbeginFL \DIFdelFL{1 }\DIFdelendFL \DIFaddbeginFL \DIFaddFL{3 }\DIFaddendFL \\
              \DIFdelbeginFL \DIFdelFL{B }\DIFdelendFL \DIFaddbeginFL \DIFaddFL{D }\DIFaddendFL & \DIFdelbeginFL \DIFdelFL{2 }\DIFdelendFL \DIFaddbeginFL \DIFaddFL{4 }\DIFaddendFL & \DIFdelbeginFL \DIFdelFL{2 }\DIFdelendFL \DIFaddbeginFL \DIFaddFL{4 }\DIFaddendFL \\
          \end{tabular}}
      \end{table} \end{document}

Output

Related Solutions

[Tex/LaTex] Make Latexdiff work on big, complex project

»Doesn't work« is not really helpfull, but I hit limitations of the latexdiff and found it very helpfull to put those lines into the preamble of my document:

\providecommand{\DIFadd}[1]{{\protect\color{blue}#1}} %DIF PREAMBLE
\providecommand{\DIFdel}[1]{{\protect\color{red}\protect\scriptsize{#1}}}

[Tex/LaTex] Latexdiff with subfiles

Note that the following is a work-around rather than a full solution:

latexdiff --append-safecmd=subfile d1/main.tex d2/main.tex --flatten > mydiff.tex

will take care of the cases where a \subfile command has been added or removed from the file, and the whole block is marked up (only tested on the MWE, would need to be confirmed for longer included material), or the filename of included file changes. You would still need to copy the included files into the directory where the difference file is generated (current directory in the MWE).

To highlight content changes to the subfiles, you can process each file separately

cat /dev/null > null latexdiff -pnull d1/includeme.tex d2/includeme.tex > includeme.tex

The -p option forces latexdiff to omit the preamble commands that it normally inserts automatically when it finds a \begin{document} (auxiliary file "null" is needed as -p/dev/null is not recognised due to a bug in latexdiff).

Now all that remains is to automate this. The following line is a hacky way to achieve some automation as proof-of-concept but would really need to be expanded into a more robust and flexible small shell script:

grep -v '^%' main.tex | grep subfile\{ | sed 's/^.*subfile{$.*$}.*$/\1/' \ | awk '{ print "latexdiff -pnull d1/" $1, "d2/" $1,">", $1 }' | sh

Best Answer

Related Solutions

[Tex/LaTex] Make Latexdiff work on big, complex project

[Tex/LaTex] Latexdiff with subfiles

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