Mrthfx

I'm trying to write Latex documents that will automatically satisfy government requirements for labeling certain classes of information:

- Each paragraph starts with a label indicating its importance.

- The header and footer of each page include a label indicating the
most important paragraph on that page (even if it started on the
previous page).

This is the closest I have come:

documentclass[12pt]{report}

usepackage{fancyhdr}

usepackage{ifthen}

usepackage{afterpage}

usepackage{color}

usepackage{lipsum}



setlengthparskip{.6baselineskip}

setlengthparindent{0pt}

setlengthheadheight{15pt}

setlengthtextheight{21baselineskip}

newcommandpageimport{TRIVIAL}

newcommandparaimport{TRIVIAL}



pagestyle{fancy}

lhead{}chead{leftmark}rhead{}

lfoot{}cfoot{leftmark}rfoot{thepage}



newcommand{IMP}[1]{renewcommandparaimport{IMPORTANT}

  renewcommandpageimport{IMPORTANT}

  markboth{pageimport}{paraimport}

  afterpage{renewcommandpageimport{protectparaimport}markboth{protectparaimport}{}}

textcolor{red}{(I)  #1}renewcommandparaimport{TRIVIAL}}



newcommand{TRI}[1]{renewcommandparaimport{TRIVIAL}

  markboth{pageimport}{paraimport}

  afterpage{renewcommandpageimport{protectparaimport}markboth{protectparaimport}{}}

(U)  #1renewcommandparaimport{TRIVIAL}}



begin{document}

immediatetypeout{a. pageimport = pageimportspace  paraimport = paraimport}

TRI{lipsum[1]}

TRI{lipsum[2]}

TRI{lipsum[3]}

immediatetypeout{b. pageimport = pageimportspace  paraimport = paraimport}

IMP{lipsum[4]}

immediatetypeout{c. pageimport = pageimportspace  paraimport = paraimport}

TRI{lipsum[5]}

TRI{lipsum[6]}

TRI{lipsum[7]}

TRI{lipsum[8]}

immediatetypeout{d. pageimport = pageimportspace  paraimport = paraimport}

IMP{lipsum[9]}

immediatetypeout{e. pageimport = pageimportspace  paraimport = paraimport}

TRI{lipsum[10]}

TRI{lipsum[11]}

TRI{lipsum[12]}

end{document}

(I've changed the labels here to avoid causing needless alarm. For
convenience, I have also set the "important" text in red.) My idea is
to keep the "importance" of each paragraph in paraimport. That gets
reset at the end of each paragraph. The header and footer get their
labels from pageimport, which records the highest importance on the
current page. At the end of each page, pageimport gets reset to the
value of paraimport.

This document has one "important" paragraph on page 2, and another
that starts on page 4 and ends on page 5. All the paragraphs are
correctly labeled. The first two pages have the right labels, but
pages 3 and 6 should be marked "trivial". The tracing statements
before and after each "important" paragraph show that pageimport is
not getting reset at the pagebreaks.

I suspect I'm moving something fragile, but rewriting the afterpage
commands as

afterpage{renewcommandpageimport{protectparaimport}markboth{protectparaimport}{}}

makes no difference.

I've seen secret.sty, but it's attacking a different problem. I have
not been able to adapt it for page marking.

I'd appreciate any suggestions.

Here is a solution.

The key point is to reset left and right marks

afterpage{%

renewcommandparaimport{TRIVIAL}%

markboth{paraimport}{paraimport}

Note We need only one command paraimport

Update the idea is to redefine parimport and markboth inside paragraphs i.e. just after (I).

Updated MWE

documentclass[12pt]{report}

usepackage{fancyhdr}

usepackage{afterpage}

usepackage{color}

usepackage{lipsum}



setlengthparskip{.6baselineskip}

setlengthparindent{0pt}

setlengthheadheight{15pt}

setlengthtextheight{21baselineskip}





pagestyle{fancy}

lhead{}chead{leftmark}rhead{}

lfoot{}cfoot{leftmark}rfoot{thepage}



newcommandparaimport{TRIVIAL}

markboth{paraimport}{paraimport}



newcommand{IMP}[1]{%

textcolor{red}{(I)

renewcommandparaimport{IMPORTANT}%

markboth{paraimport}{paraimport}%

 #1}%

afterpage{%

renewcommandparaimport{TRIVIAL}%

markboth{paraimport}{paraimport}}%

}



newcommand{TRI}[1]{(U)  #1}



begin{document}

TRI{lipsum[1]}

TRI{lipsum[2]}

TRI{lipsum[3]}

IMP{lipsum[4]}

TRI{lipsum[5]}

TRI{lipsum[6]}

TRI{lipsum[7]}

TRI{lipsum[8]}

IMP{lipsum[9]}

TRI{lipsum[10]}

TRI{lipsum[11]}

TRI{lipsum[12]}

end{document}

It seems as though the most complicated part of this problem is the case when a paragraph continues through a page break. Perhaps the easiest thing to do is to prevent paragraphs from doing so:

widowpenalties 1 10000

raggedbottom

The question is a bit old, but it still comes up high on a web search. I was trying to adapt the solution for multiple importance levels and came across this answer to check if a paragraph spans a page break. My thought solution is to set a counter and increment the counter if a paragraph has a higher importance level than the current paragraph. If the last paragraph on the page spans the page break, I set the page level on the next page to the current level and repeat the process. What I came up with is

documentclass{article}



usepackage{afterpage}

usepackage{lipsum}

usepackage{fancyhdr}

pagestyle{fancy}

fancyhf{}



newcounter{pagelevel}



usepackage{atbegshi}

usepackage{zref-user}

usepackage{zref-abspage}



makeatletter

newcounter{clscnt}

newenvironment{markingenv}[1]{%

    stepcounter{clscnt}%

    zlabel{markingenv-begin-theclscnt}%

    (#1 --- thepagelevel)

    ifnum #1 > thepagelevel%

        setcounter{pagelevel}{#1}%

        chead{Level thepagelevel}%

    fi%

}{%

    zlabel{markingenv-end-theclscnt}%

    ifnumzref@extract{markingenv-begin-theclscnt}{abspage}

            =zref@extract{markingenv-end-theclscnt}{abspage}

        AtBeginShipoutNext{setcounter{pagelevel}{thepagelevel}}%

    else

        AtBeginShipoutNext{setcounter{pagelevel}{0}}%

    fi

}

makeatother



newcommand{marking}[2]{%

    begin{markingenv}{#1}%

        #2

    end{markingenv}%

}



newcommand{VI}[1]{marking{3}{(V) #1}}

newcommand{IMP}[1]{marking{2}{(I) #1}}

newcommand{TRI}[1]{marking{1}{(U) #1}}



begin{document}

TRI{lipsum[1]par}

TRI{lipsum[2]par}

TRI{lipsum[3]par}

IMP{lipsum[4]par}

TRI{lipsum[5]par}

TRI{lipsum[6]par}

TRI{lipsum[7]par}

TRI{lipsum[8]par}

IMP{lipsum[9]par}

TRI{lipsum[10]par}

TRI{lipsum[11]par}

TRI{lipsum[12]par}

TRI{lipsum[13]par}

TRI{lipsum[14]par}

TRI{lipsum[15]par}

VI{lipsum[16]par}

IMP{lipsum[17]par}

TRI{lipsum[18]par}

TRI{lipsum[19]par}

TRI{lipsum[20]par}

TRI{lipsum[21]par}

TRI{lipsum[22]par}

TRI{lipsum[23]par}

TRI{lipsum[24]par}

TRI{lipsum[25]par}

TRI{lipsum[26]par}

TRI{lipsum[27]par}

TRI{lipsum[28]par}

TRI{lipsum[29]par}

end{document}

I modified the example to explicitly show the page level and paragraph level. Note that pages 3 and 4 correctly have the heading set to level 3 and the heading is reset to 1 on pages 5 and 6.