Ttyjukl

Problem Description

I am quite a newbie at *TeX, but I defined some newcommands as some kind of paragraph styles (maybe not the proper way to do so, maybe someone could tell me how to accomplish this better).

I want to have default paragraph style with no indentation, space after paragraph should be 0.08", space before paragraph should be 0". However, any of the paragraph style could change any of these settings and some something more (like character styles, e.g. bold, italics, underline, etc).

Now, sometimes I want to insert a paragraph in particular paragraph style without space after that paragraph. For that I use line break (\), which usually does the job. However, with the paragraphStyle below, this is broken.

It seems like if in the first paragraph, there is an indentation of a size of a space, which I cannot elimininate, no matter what I do.

What I have Tried

I tried to use noindent and setlength{parindent}{0em} in many different combinations.

Minimal Working Example

%%%%%  Preamble  %%%%%

documentclass[10pt]{book}

usepackage[a4paper]{geometry}

geometry{

    a4paper,

    left=1in,

    right=1in,

    top=1in,

    bottom=1in,

    portrait

}



usepackage{xcolor}



% Font family

usepackage[math-style=ISO, bold-style=ISO, partial=upright, nabla=upright]{unicode-math}

setmainfont{Libertinus Serif}



% Paragraph and line settings

setlength{parindent}{0em}           % Set paragraph indentation

setlength{parskip}{0.08in}          % Paragraph spacing

renewcommand{baselinestretch}{1.0}  % Line expandafterselectlanguageexpandafter{cvlang}



% Custom commands

newcommand{paragraphStyle}[1]{setlength{parindent}{0pt}setlength{parskip}{0.16in}renewcommand{baselinestretch}{2.0}color{black!100}fontsize{20pt}{24pt}selectfont{textbf{#1}}color{black!100}normalsizesetlength{parindent}{0em}setlength{parskip}{0.08in}selectfontrenewcommand{baselinestretch}{1.0}}%



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



begin{document}

    pagestyle{empty}



    This is wrong:



    paragraphStyle{

        First line\

        Second line

    }



    This is correct:



    paragraphStyle{First line}\

    paragraphStyle{Second line}





    Also this is correct in indentation, but not in space after paragraph:



    First Line\

    Second Line

end{document}

Output

As Marcel pointed out, there is a stray space in your input. You can remove that space, as Marcel suggests, or you can add ignorespaces, within your macro definition, to your argument of textbf, prior to #1. Also, there is no need for the textbf{} to be in its own braces, so I removed it.

Note: an alternative for that part of the definition that now reads textbf{ignorespaces#1} could also be {bfseries#1}. Here, the braces are now necessary to limit the scope, but the ignorespaces is no longer required because bfseries leaves you in vertical mode, so the leading space in #1 is ignored, whereas textbf{} puts you in horizontal mode, where the leading space counts.

Also, I reorganized your definition of paragraphStyle to make it easier for humans to read. Note the presence of % end-of-line delimiters, to avoid the very same problem again.

documentclass[10pt]{book}

usepackage[a4paper]{geometry}

geometry{

    a4paper,

    left=1in,

    right=1in,

    top=1in,

    bottom=1in,

    portrait

}



usepackage{xcolor}



% Font family

%usepackage[math-style=ISO, bold-style=ISO, partial=upright, nabla=upright]{unicode-math}

%setmainfont{Libertinus Serif}



% Paragraph and line settings

setlength{parindent}{0em}           % Set paragraph indentation

setlength{parskip}{0.08in}          % Paragraph spacing

renewcommand{baselinestretch}{1.0}  % Line expandafterselectlanguageexpandafter{cvlang}



% Custom commands

newcommand{paragraphStyle}[1]{%

  setlength{parindent}{0pt}%

  setlength{parskip}{0.16in}%

  renewcommand{baselinestretch}{2.0}%

  color{black!100}%

  fontsize{20pt}{24pt}%

  selectfont%

  textbf{ignorespaces#1}%

  color{black!100}%

  normalsize%

  setlength{parindent}{0em}%

  setlength{parskip}{0.08in}%

  selectfont%

  renewcommand{baselinestretch}{1.0}%

}%



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



begin{document}

    pagestyle{empty}



    This is no longer wrong:



    paragraphStyle{

        First line\

        Second line

    }



    This is correct:



    paragraphStyle{First line}\

    paragraphStyle{Second line}





    Also this is correct in indentation, but not in space after paragraph:



    First Line\

    Second Line

end{document}

The "indentation of a size of a space" actually isn't an indentation, it is a space at the start of the line:

Look at

    This is wrong:



    paragraphStyle{

        First line\

        Second line

    }

The newline after paragraphStyle{ is converted to a space which results in the observed "indentation".
You can avoid this by adding a % to comment the newline, suppressing the space:

    This is wrong:



    paragraphStyle{%

        First line\

        Second line

    }

The full document becomes

%%%%%  Preamble  %%%%%

documentclass[10pt]{book}

usepackage[a4paper]{geometry}

geometry{

    a4paper,

    left=1in,

    right=1in,

    top=1in,

    bottom=1in,

    portrait

}



usepackage{xcolor}



% Font family

usepackage[math-style=ISO, bold-style=ISO, partial=upright, nabla=upright]{unicode-math}

setmainfont{Libertinus Serif}



% Paragraph and line settings

setlength{parindent}{0em}           % Set paragraph indentation

setlength{parskip}{0.08in}          % Paragraph spacing

renewcommand{baselinestretch}{1.0}  % Line expandafterselectlanguageexpandafter{cvlang}



% Custom commands

newcommand{paragraphStyle}[1]{setlength{parindent}{0pt}setlength{parskip}{0.16in}renewcommand{baselinestretch}{2.0}color{black!100}fontsize{20pt}{24pt}selectfont{textbf{#1}}color{black!100}normalsizesetlength{parindent}{0em}setlength{parskip}{0.08in}selectfontrenewcommand{baselinestretch}{1.0}}%



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



begin{document}

    pagestyle{empty}



    This is wrong:



    paragraphStyle{%

        First line\

        Second line

    }



    This is correct:



    paragraphStyle{First line}\

    paragraphStyle{Second line}





    Also this is correct in indentation, but not in space after paragraph:



    First Line\

    Second Line

end{document}