Dtyjlui

Initial problem:

I want to underline the text with a continuous line with the following code:

uline{No underlining for colorbox{lightgray}{everything} inside the colorbox.}

Workaround:

A solution to get a continuous line for the text inside colorbox as well, is to do:

sbox0{uline{hspace{fboxsep}everythinghspace{fboxsep}}}

uline{No underlining for colorbox{lightgray}{hspace{-fboxsep}usebox0hspace{-fboxsep}} inside the colorbox.}

Question:

How can I redefine uline, so every colorbox inside uline is locally defined as shown above in the workaround to have underlined text, too?

MCVE:

documentclass[12pt]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{lmodern}

usepackage{xcolor}

usepackage[normalem]{ulem}



begin{document}



uline{No underlining for colorbox{lightgray}{everything} inside the colorbox.}



end{document}

Here is a way with tikz and using a node, drawing a line at the bottom of the node. However, this does not work with text - wrapping, i.e. if the text is wider than text width, it will fail.

In principle, underlining is not the best way of typographical markup, in my point of view.

documentclass[12pt]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{lmodern}

usepackage{xcolor}

%usepackage[normalem]{ulem}

usepackage{tikz}



newcommand{underlinethis}[3][0.15baselineskip]{%

  tikz[remember picture,baseline=(A.base)]{% 

    node[inner sep=0pt,outer sep=0pt] (A) {#3}; % Place the node and typeset the text

    draw[#2] ([yshift=#1]A.south west) -- ([yshift=#1]A.south east); % Draw the line, shifted up by some value

  }%

}



begin{document}

underlinethis{blue, line width=1pt}{No underlining for colorbox{lightgray}{everything} inside the colorbox.}



underlinethis{red, line width=1pt,dashed}{No underlining for colorbox{lightgray}{everything} inside the colorbox.}

end{document}

Redefining uline to include a redefinition of colorbox.

documentclass[12pt]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{lmodern}

usepackage{xcolor}

usepackage[normalem]{ulem}



makeatletter

longdefafterelsefi#1else#2fi{fi#1}

longdefafterfi#1fi{fi#1}

defq@mark{q@mark}

newcommanduline@colorbox[3][q@mark]

  {%

    ifxq@mark#1%

      afterelseficolorbox@orig{#2}%

    else

      afterficolorbox@orig[#1]{#2}%

    fi

    {%

      % nested uline becomes a second rule which is a bit lower than first

      % the following changes the values of UL@height and ULdepth so that the

      % calculation done by ulem results in the original values

      advanceUL@heightULdepth

      advanceULdepth-thr@@UL@height

      hskip-fboxsep

      uline{hskipfboxsep#3hskipfboxsep}%

      hskip-fboxsep

    }%

  }

letcolorbox@origcolorbox

protecteddefuline

  {%

    relax

    ifmmode

      expandafterunderline

    else

      bgroup

      letcolorboxuline@colorbox % this is added compared to the original definition

      expandafterULset

    fi

  }

makeatother



begin{document}



uline{No underlining for colorbox{lightgray}{everything} inside the colorbox.}



end{document}

Don't underline. Ever.

If you don't want to adhere to the advice above, be aware that when you call uline inside uline the macro adds a further 1.2pt, because it thinks you want to double underline.

documentclass[12pt]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{lmodern}

usepackage{xcolor}

usepackage[normalem]{ulem}



letulemulineuline

renewcommand{uline}[1]{%

  begingroup

  redefinecolorbox

  ulemuline{#1}%

  endgroup

}

letlatexcolorboxcolorbox

newcommandredefinecolorbox{%

  renewcommandcolorbox[2]{%

    latexcolorbox{##1}{%

      advanceULdepth-1.2pt

      kern-fboxsep

      ulemuline{hspace{fboxsep}##2hspace{fboxsep}}%

     kern-fboxsep

    }%

  }%

}



begin{document}



uline{No underlining for colorbox{lightgray}{everything} inside the colorbox.}



end{document}