common_headers.tex

%%%%%%%%%%%%%%% INDICES %%%%%%%%%%%%%%%

\usepackage{imakeidx}

%% This is deep magic required to make dotted_mode.ist work.
%% Found in https://tex.stackexchange.com/questions/594568/how-to-integrate-a-tabular-environment-in-the-index
\setlength{\columnseprule}{0.4pt}
\newsavebox\ltmcbox
\newlength\mysavecolroom
%% This is added before automatically-inserted instances of \\ in longtable-based indices in order to ignore those
\newcommand{\ignoreNL}[1]{} 
%% This is a special macro to be used for explicit newlines
%% inside indices where a tabular is used,
%% which are indices where the mode is printed,
%% to be used in the indexed value (i.e. the piece's title)
\newcommand{\idxnewline}{\newline\null\hspace{4mm}}
%% a simple newline\null can be added if it is at the end of the title.

\indexsetup{level=\section*,toclevel=section,noclearpage,othercode=\footnotesize\thispagestyle{empty}}
\makeindex[name=I,title=Index Invitatoriorum, columns=2,columnseprule, options=-s dotted_mode.ist]
\makeindex[name=H,title=Index Hymnorum, columns=2,columnseprule, options=-s dotted_thinmode.ist]
\makeindex[name=A,title=Index Antiphonarum, columns=2,columnseprule, options=-s dotted_mode.ist]
\makeindex[name=R,title=Index Responsoriorum, columns=2,columnseprule, options=-s dotted_thinmode.ist]
\makeindex[name=P,title=Index Psalmorum, columns=2,columnseprule, options=-s dotted.ist]
\makeindex[name=T,title=Toni Communes, columns=2,columnseprule, options=-s dotted.ist]
\makeindex[name=F,title=Index Festorum, columns=2,columnseprule, options=-s dotted.ist]

%%%%%%%%%%%%%%% STANDARD PACKAGES %%%%%%%%%%%%%%%

%% This is the format of the recent Solesmes books.
%\usepackage[paperwidth=135mm, paperheight=205mm]{geometry}

%% This is made to be printed on KDP 6inx9in paperback without changing the reference column width
\usepackage[paperwidth=145mm, paperheight=217.5mm]{geometry}

%% This is the format of the 1912 Antiphonale Romanum
%\usepackage[paperwidth=160mm, paperheight=240mm]{geometry}

\usepackage{fontspec}
\usepackage[nolocalmarks]{polyglossia}
\usepackage[table]{xcolor}
\usepackage{fancyhdr}
\usepackage{titlesec}
\usepackage{setspace}
\usepackage{expl3}
\usepackage{hyperref}
\usepackage{refcount}
\usepackage{needspace}
\usepackage{etoolbox}
\usepackage{enumitem}
\usepackage{lettrine}
\usepackage{longtable}
\usepackage{luacode}
\usepackage{paracol}

%%%%%%%%%%%%%%% HYPHENATION AND TYPOGRAPHICAL CONVENTIONS %%%%%%%%%%%%%%

%\setdefaultlanguage[variant=ecclesiastic, hyphenation=liturgical, usej=true, babelshorthands=false]{latin}
\setdefaultlanguage[variant=french, frenchitemlabels=false]{french}
\setotherlanguage{english}
%% this latin option basically boils down to French with slightly thinner pre-punctuation spaces 
%% and slightly different hyphenation (but how different?)
%% for some reason, it produces more underfull hboxes in two-col psalms, than French; and about 0.5% more pages.
%% French is therefore to be kept until further notice.
%\setotherlanguage[variant=ecclesiastic, hyphenation=liturgical, usej=true]{latin}

%%%%%%%%%%%%%%% GEOMETRY %%%%%%%%%%%%%%%

%% This should mimic the layout of the recent Solesmes books.
%\geometry{
%inner=15mm,
%outer=10mm,
%top=12mm,
%bottom=15mm,
%headsep=3mm,
%}

%% This should ensures the same column width (for line breaks) as the Solesmes reference layout, but to print on 6x9in KDP paperback
\geometry{
inner=25mm,
outer=10mm,
top=12mm,
bottom=15mm,
headsep=3mm,
}

%% General scale of all graphical elements.
%% Values different from 1 are largely untested.
%% Used in those commands (e.g. everything FontSpec) that use a scale parameter.
\newcommand{\customscale}{1}

%% Provide the command \fpevalc as a copy of the code-level \fp_eval:n.
%% \fpevalc allows to evaluate floating point calculation for scaled parameters, e.g. \setSomeStretchFactor{\fpevalc{0,6 * \customscale}}
\ExplSyntaxOn
\cs_new_eq:NN \fpevalc \fp_eval:n
\ExplSyntaxOff

%% No indentation of paragraphs
\setlength{\parindent}{0mm}

%% We want to allow large inter-words space 
%% to avoid overfull boxes in two-columns rubrics.
\sloppy

%%%%%%%%%%%%%%% GREGORIO CONFIG %%%%%%%%%%%%%%%
%%%%%%%%%%%%%%% BEWARE! THIS PART OF THE FILE IS HEAVILY MODIFIED FOR THE TRIDENTINE PSALTER
%%%%%%%%%%%%%%% IT PRINTS ALL ANTIPHONS WITHOUT EUOUAE BECAUSE THEY ARE ONLY FOR INCIPITS IN THE FERIAL OFFICE

\usepackage[forcecompile]{gregoriotex}

%% this limits how much scores can stretch vertically
%% when they are forced to adhere to the bottom of a page (i.e followed by \pagebreak)
%\grechangedim{baselineskip}{55pt plus 1pt minus 5pt}{scalable}
%% this however has been found to break the page layout of the psalterium festivum, somehow

%% text above lines shall be of color gregoriocolor
\grechangestyle{abovelinestext}{\color{gregoriocolor}\footnotesize\itshape}
%% fine-tuning of space beween the staff and the text above lines
\newcommand{\altraise}{-0.4mm} %% default is -0.1cm
\grechangedim{abovelinestextraise}{\altraise}{scalable}
\grechangedim{abovelinestextheight}{10mm}{scalable}

%% fine-tuning of space between the staff and the lyrics
\newcommand{\textraise}{2.8ex} %% default is 3.48471 ex
\grechangedim{spacelinestext}{\textraise}{scalable}

%% fine-tuning of space between the initial and the annotations
\newcommand{\annraise}{0mm} %% default is -0.2mm
\grechangedim{annotationraise}{\annraise}{scalable}

%% fine-tuning the behavior of text placed under bars. We use the so-called "new algorithm" which
%% places the bar in the middle of surrounding notes, and the text in the middle of surrounding text.
%% however, we restrict drastically the deviation of the text from the position of the bar.
\grechangedim{maxbaroffsettextleft}{0.5mm}{scalable}
\grechangedim{maxbaroffsettextright}{0.5mm}{scalable}

%% in case we show NABC, font selection
\gresetnabcfont{gregall}{9} 

%% \officepartannotation converts a letter (IHARPT) into the office part to be printed as annotation,
%% storing the result into \result.

\newcommand{\result}{}
\newcommand{\lookup}[3]{%
  \IfSubStr{#2}{#1}{ \renewcommand{\result}{#3} }{}%
}%
\newcommand{\officepartannotation}[1]{%
  \renewcommand{\result}{#1}%
  \lookup{#1}{T}{}%
  \lookup{#1}{H}{Hymn.}%
  \lookup{#1}{A}{Ant.}%
  \lookup{#1}{P}{}%
  \lookup{#1}{R}{Resp.}%
  \lookup{#1}{I}{Invit.}%
  \result%
}%

%% header capture setup for the mode, with indexation of the score
%% IMPORTANT NOTE: giving mode info is necessary for a score to be indexed.
%% in this context, the mode may not be left blank in the gabc, as in: "mode:;",
%% but must have some sort of text going on, as in: "mode:~;" which will produce the expected result
\newcommand{\defaultannotationshift}{-2mm}
\newcommand{\indexnamebuffer}{}
\newcommand{\piecenamebuffer}{}
\newcommand{\modeannotation}[1]{
  \greannotation{\hspace{\defaultannotationshift}#1}
  \modeindexing{#1}
}
\newcommand{\modeindexing}[1]{
  \ifblank{\piecenamebuffer}{}{% if the indexed name of the piece is not given, no indexation effort is made
    \ifthenelse{\equal{I}{\indexnamebuffer}}{
      \index[\indexnamebuffer]{{\piecenamebuffer}@#1 & \piecenamebuffer}
    }{
	  \ifthenelse{\equal{H}{\indexnamebuffer}}{
        \index[\indexnamebuffer]{{\piecenamebuffer}@#1 & \piecenamebuffer}
      }{
	    \ifthenelse{\equal{A}{\indexnamebuffer}}{
          \index[\indexnamebuffer]{{\piecenamebuffer}@#1 & \piecenamebuffer}
        }{
	      % if the piece is not among the given office_parts, no indexation effort is made
        }
      }
    }
  }
}

\gresetheadercapture{mode}{modeannotation}{string}

%% outputs a score with no label, indexing, initials or annotations
%% for 
\newcommand{\unindexedscore}[1]{
  \gresetinitiallines{0}
  %% the use of a directory called "gabc" is linked
  %% to the management of gabc files by the website: do not change 
  %% without also changing the website static files structure
  \gregorioscore{\subfix{nocturnale-romanum/gabc/#1}}
  \gresetinitiallines{1}
}

%% this removes instances of \newline from a string.
%% used in order to allow new lines in the indexed name of a piece, 
%% but not have those new lines in the \@currentlabelname for reference purposes
\begin{luacode*}
function delete_newline ( s )
   s = string.gsub ( s, 'newline', '')
   s = string.gsub ( s, 'hspace', '')
   s = string.gsub ( s, '4mm', '')
   s = string.gsub ( s, 'protect', '')
   s = string.gsub ( s, 'hbox', '')
   s = string.gsub ( s, [[\]], '')
   s = string.gsub ( s, "{}", '')
   tex.sprint ( s )
end
\end{luacode*}

%% outputs a score with label, indexing, and annotations. no initials if [n] is passed
\makeatletter
\newcommand{\gscore}[5][y]{
  %% #1 (passed as option) : y = initial, n = no initial
  %% #2 : name of the score file, should be a code, e.g. Q4F4A3 or 1225N1R1
  %% #3 : office-part among the values: T, H, A, P, R, I (toni communes, hy., ant., psalmus, resp., invit.)
  %% #4 : if applicable, a number between 1 and 9 (rank of the ant./resp.) - else: empty
  %% #5 : the indexed name of the piece
  
  %% this prevents page breaks between the phantom section and its label, and the actual score.
  \needspace{4\baselineskip} 
  \protected@edef\@currentlabelname{\directlua{delete_newline(\luastring{#5})}}
  \phantomsection
  \label{#2}
  %% we add the office part, and number of that ant. or resp. in the current office, if applicable
  %% todo : the negative hspace is here because somehow the initial and annotation (first line only) are misaligned by 1mm _with this initial font size_.
  %% this should probably be fixed in a more elegant way.
  \greannotation[c]{\hspace{-1.4mm}\hspace{\defaultannotationshift}\officepartannotation{#3}#4}
  %% if #5 (indexed name) is blank, nothing is indexed.
  %% this is for pieces that are repetitions of another piece (antiphons after psalms)
  \ifblank{#5}{
    \renewcommand{\indexnamebuffer}{}
    \renewcommand{\piecenamebuffer}{}
  }{
    \renewcommand{\indexnamebuffer}{#3}
    \renewcommand{\piecenamebuffer}{#5}
    \ifthenelse{\equal{I}{\indexnamebuffer}}{
    % in this case, the mode is added to the index entry, and therefore indexation will be done by the header capture
    }{
      \ifthenelse{\equal{A}{\indexnamebuffer}}{
      % in this case, the mode is added to the index entry, and therefore indexation will be done by the header capture
      }{
	    \ifthenelse{\equal{H}{\indexnamebuffer}}{
        % in this case, the mode is added to the index entry, and therefore indexation will be done by the header capture
        }{
	      \index[#3]{#5}
	    }
	  }
	}
  }
  %% if optional arg #1 has been passed as 'n', set no initial
  \ifx n#1\gresetinitiallines{0}\fi
  %% the use of a directory called "gabc" is linked
  %% to the management of gabc files by the website: do not change 
  %% without also changing the website static files structure
  \gregorioscore{\subfix{nocturnale-romanum/gabc/#2}}
  %% if optional arg #1 has been passed as 'n', unset no initial
  \ifx n#1\gresetinitiallines{1}\fi
  \vspace{1mm}
}
\makeatother

\newcommand{\postpsalmantiphon}[5][y]{
    %% we temporarily disable mode annotation and replace it with the first line of "anti-phona"
	%% however, we keep mode header capture for indexation purposes
	%% we temporarily redefine the A->Ant correspondence so that it displays the second lien of "anti-phona"
	\gresetheadercapture{mode}{modeindexing}{string}
	{
		\greannotation{\hspace{-3mm}Anti-}
		\renewcommand{\officepartannotation}[1]{phona}
		%% we output the score without the antiphon number
		\gscore[#1]{#2_noeuouae}{#3}{}{#5}
	}
	\gresetheadercapture{mode}{modeannotation}{string}
}

\newcommand{\scoreincipit}[3]{
	\gscore{#1_incipit}{#2}{#3}{}
}

%%% We select if we want to show NABC. Here, we do.

\gresetnabc{1}{visible}
\gresetnabc{2}{invisible}

%%%%%%%%%%%%%%% FONTS %%%%%%%%%%%%%%%

%%%%%%%%%%%%%%% Main font
\setmainfont[Ligatures=TeX, Scale=\customscale]{Charis SIL}
%\setmainfont[Ligatures=TeX, Scale=\customscale]{TeXGyreBonum-Regular}
\setstretch{\fpevalc{1.05 * \customscale}}

%%%%%%%%%%%%%%% Score initials
%% \initialsize resizes the initials, with one argument (size in points)
\newcommand{\initialsize}[1]{
    \grechangestyle{initial}{\fontspec{Zallman Caps}\fontsize{#1}{#1}\selectfont}
}
%% default initial size is 32 points
\newcommand{\defaultinitialsize}{28}
\initialsize{\defaultinitialsize}

%% spacing before and after initials to kern the Zallman Caps.
%% this should be changed if we move away from Zallman Caps.
\newcommand{\initialspace}[2]{
  \grechangedim{afterinitialshift}{#2}{scalable}
  \grechangedim{beforeinitialshift}{#1}{scalable}
}
%% default space before and after initials is 0mm to the left and 2mm to the right.
\newcommand{\defaultinitialspace}{\initialspace{0mm}{-\defaultannotationshift}}
\defaultinitialspace{}

%%%%%%%%%%%%%%% Score annotations
\grechangestyle{annotation}{\small}

%%%%%%%%%%%%%%% GRAPHICAL ELEMENTS %%%%%%%%%%%%%%%

%% V/, R/, A/ and + signs for in-line use (\vv \rr \aa \cc)
\newcommand{\specialcharhsep}{3mm} % space after invoking R/ or V/ or A/ outside rubrics
\newcommand{\vv}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{Charis SIL}℣.\nolinebreak[4]\hspace{\specialcharhsep}\nolinebreak[4]}}
\newcommand{\rr}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{Charis SIL}℟.\nolinebreak[4]\hspace{\specialcharhsep}\nolinebreak[4]}}
\renewcommand{\aa}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{Charis SIL}\Abar.\nolinebreak[4]\hspace{\specialcharhsep}\nolinebreak[4]}}
\newcommand{\cc}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{FreeSerif}\symbol{"2720}~}}
%% Same special characters, for in-score use (<sp>V/ R/ A/ +</sp>)
\gresetspecial{V/}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{Charis SIL}℣.~}}
\gresetspecial{R/}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{Charis SIL}℟.~}}
\gresetspecial{A/}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{Charis SIL}\Abar.~}}
\gresetspecial{+}{{\fontspec[Scale=\customscale]{FreeSerif}†~}}
\gresetspecial{*}{\gresixstar}
\gresetspecial{cross}{\textcolor{gregoriocolor}{\fontspec[Scale=\customscale]{FreeSerif}\symbol{"2720}}}
\gresetspecial{labiacross}{\textcolor{gregoriocolor}{+}}
%% Same special characters, for use in rubrics (no space, and no red command since it will be reddified with the rest)
\newcommand{\vvrub}{{\fontspec[Scale=\customscale]{Charis SIL}℣.~}}
\newcommand{\rrrub}{{\fontspec[Scale=\customscale]{Charis SIL}℟.~}}
\newcommand{\aarub}{{\fontspec[Scale=\customscale]{Charis SIL}\Abar.~}}

%% the asterisk as found in the mediants of text-only psalms
\newcommand{\psstar}{\GreSpecial{*}}
\newcommand{\pscross}{\GreSpecial{+}}
%% also, most psalms do not call those but use † and * - todo

%% Roman Numerals
\usepackage{modroman}
\newcommand{\Rnum}[1]{\nbRoman{#1}}
\newcommand{\rnum}[1]{\nbshortroman{#1}}

%% Macro to print versicles
\newcommand{\versiculus}[2]{\par\vv #1 \\ \rr #2\par}

\newcommand{\versiculustpall}[2]
	{\versiculus{#1 \rubric{(T.P.} Allelúia.\rubric{)}}{#2 \rubric{(T.P.} Allelúia.\rubric{)}}}

%% Macro to print rubrics
\newcommand{\rubric}[1]{\textcolor{gregoriocolor}{\emph{#1}}}

%% Macro to print the name of a score in normal characters inside a \rubric
\newcommand{\normaltext}[1]{{\normalfont\normalcolor #1}}
\newcommand{\scorename}[1]{\normaltext{\nameref{M-#1}}}

%% Macro to print a full reference to a responsory
%% #1 is the R/ number in the feast, #2 is the R/ code, #3 is an optional additional text, like "sine Gloria Patri".
\newcommand{\respref}[3]{\rubric{%
\rrrub #1 \scorename{#2}, pag.\ \pageref{M-#2}%
\if\relax\detokenize{#3}\relax%
.%
\else%
, #3.%
\fi%
}}

\newcommand{\resprefcumgp}[2]
	{\respref{#1}{#2}{sed cum \normaltext{Glória Patri} in fine}}
	
\newcommand{\resprefsinegp}[2]
	{\respref{#1}{#2}{sine \normaltext{Glória Patri}}}

%% Macro to print the common rubric that signals the Te Deum
\newcommand{\tedeumrubric}{\rubric{Lectione ultima peracta Hymnus \normaltext{Te Deum} cantatur.}}

%% Macro to print the common rubric that signals the Paschaltide three-psalm one-antiphon rule
\newcommand{\tptresrubric}{\rubric{Tempore Paschali tres Psalmi sub hac Antiphona dicuntur.}}

%% Macro to print a reference to a single Invitatory
\newcommand{\invitref}[1]{\rubric{Invitatorium \scorename{#1}, pag.\ \pageref{M-#1}.}}

%% Macro to print the common rubric "invitatorium de feria"
\newcommand{\invitferia}{\rubric{Invitatorium de Feria.}}

%% Macros to print the common rubrics regarding feast solemnity
\newcommand{\rubricsimplefeasts}{\rubric{Tonus simplex:}}
\newcommand{\rubricdoublefeasts}{\rubric{Tonus festivus:}}
\newcommand{\rubricsolemnfeasts}{\rubric{Tonus solemnis:}}
\newcommand{\rubrictp}{\rubric{Tempore Paschali:}}
\newcommand{\perannumrubric}{\rubric{Per Annum:}}
\let\tprubric\rubrictp
\newcommand{\quadrubric}{\rubric{In Quadragesima:}}
\newcommand{\passrubric}{\rubric{Tempore Passionis:}}
\newcommand{\adventrubric}{\rubric{In Adventu:}}
\newcommand{\nonrepetiturrubric}{\rubric{Et non repetitur in Psalmo.}}

%% Macro to print a separator

\newcommand{\sep}{{\centering\greseparator{3}{20}\par}}

%% Macro to print alternative text (feminine, plural...) between red parentheses
\newcommand{\bracketed}[1]{{\textcolor{gregoriocolor}(}#1{\textcolor{gregoriocolor})}}

%%%%%%%%%%%%%%% COLUMN MANAGEMENT %%%%%%%%%%%%%%%

\usepackage{multicol}
\usepackage{parcolumns}
\setlength\columnseprule{0.4pt}
\setlength{\multicolsep}{6pt plus 2pt minus 1.5pt}

%% Macro to print an itemized list on two columns (psalm, canticle, etc) from a tex file
\newcommand{\twocolitemized}[1]{
	\begin{multicols}{2}%
	\begin{itemize}[
		label=\null, 
		leftmargin=0pt, 
		itemindent=5pt, 
		labelsep=0pt, 
		labelwidth=0pt, 
		rightmargin=0pt, 
		parsep=0pt, 
		itemsep=0pt plus 1pt]
	\input{#1}%
	\end{itemize}%
	\end{multicols}%
}

%% Macro to print a psalm on two columns with the title "psalmus N".
\newcommand{\psalmus}[3][]{
	%% #1, passed as option, label or blank.
	%% Every psalm_tone combination should be printed once with label, and the other times without label.
	%% #2, psalm number
	%% #3, tone
	\vspace{0.5\baselineskip}
	\needspace{5\baselineskip}
	\phantomsection
	\ifblank{#1}{}{\label{Psalm#2_#3}}
	\index[P]{#2 (mode #3)}
	\smalltitle{Psalmus #2}
	\twocolitemized{nocturnale-romanum/psalmi/#2_#3.tex}%
}

\newcommand{\unpointedpsalm}[1]{
    \psalmus{#1}{}
}

%% Macro to print a psalm on two columns with the title "in tono N"
\newcommand{\psalmustonus}[3][]{
	%% #1, passed as option, label or blank.
	%% Every psalm_tone combination should be printed once with label, and the other times without label.
	%% #2, psalm number
	%% #3, tone
	\vspace{0.5\baselineskip}
	\needspace{3\baselineskip}
	\phantomsection
	\ifblank{#1}{}{\label{Psalm#2_#3}}
	\index[P]{#2 (mode #3)}
	\smalltitle{in tono #3}
	\twocolitemized{nocturnale-romanum/psalmi/#2_#3.tex}%
}

%% Macro to reference a psalm printed elsewhere
\newcommand{\psalmusref}[2]{
	\rubric{Psalmus \normaltext{#1} in tono \normaltext{#2}, pag.\ \pageref{M-Psalm#1_#2}.}\par
}

\newcommand{\twocolrubric}[2]{
	\begin{parcolumns}[rulebetween]{2}
	\colchunk{%
      \rubric{#1}
	}
	\colchunk{%
	  \rubric{#2} 
    }
	\end{parcolumns}
}

%%%%%%%%%%%%%%% HEADER STYLES %%%%%%%%%%%%%%%

\pagestyle{fancy}
\fancyhead{}
\fancyfoot{}
\renewcommand{\headrulewidth}{0pt}
\setlength{\headheight}{20pt}
\fancyhead[RO]{\small\rightmark\hspace{1cm}\thepage}
\fancyhead[LE]{\small\thepage\hspace{1cm}\leftmark}

% this command is called every time the left and right header texts are set (e.g. by calling \feast)
% the hyphenpenalty override is neede only on older versions of gregorio which do not reset it correctly after typesetting the score.
% see https://tex.stackexchange.com/questions/581013/lualatex-hyphenation-issue-in-fancyhdr-with-gregoriotex-and-multicols-latin-te
\newcommand{\setheaders}[2]{
	\renewcommand{\rightmark}{\hyphenpenalty=50{\sc#2}}
	\renewcommand{\leftmark}{\hyphenpenalty=50{\sc#1}}
}
\setheaders{}{}

%%%%%%%%%%%%%%% TITLE STYLES %%%%%%%%%%%%%%%

%% Titles are centered and small-caps
\titleformat{\chapter}[block]{\Large\filcenter\sc}{}{}{}
\titleformat{\section}[block]{\large\filcenter\sc}{}{}{}
\titleformat{\subsection}[block]{\filcenter\sc}{}{}{}
\setcounter{secnumdepth}{0}
%% Fine-tuning of space around titles
\titlespacing*{\paragraph}{0pt}{1ex}{.6ex}

%% Typesets all titles throughout the NR except Nocturn titles and a few special titles.
%% Using a continuation is necessary because there are 11 arguments.
%% Only \feast, \nocturn, \intermediatetitle and \smalltitle should ever be used.
\newcommand{\feast}[6]{
  %% #1: feast code, e.g. 1225 or A1F1
  %% #2: feast title
  %% #3: left header title
  %% #4: right header title
  %% #5: title level
    %% title level 1 : full page width, a few major feasts + titles of temporale, sanctorale, etc.
	%% title level 2 : all feasts, sundays and major ferias
	%% title level 3 : ferias
  %% #6: incipit date (goes above feast title)
  %% cont'd #1: 1954 rank
  %% cont'd #2: 1960 rank
  %% cont'd #3: name of the feast as it shows up in the index
  %% cont'd #4: 1945 feast-wide rubrics
  %% cont'd #5: 1960 feast-wide rubrics

  %% needspace: should be barely more than the vertical space for the titles, rubrics excluded.
  %% this is to ensure that the page does not get cut after the title or the phantomsection.
  \needspace{8\baselineskip}
  %% phantomsection is to allow the label to attach to the title and not the previous counter object.
  \phantomsection
  \label{#1}
  \begin{center}
  %% we typeset a line for the date if the date is not blank
  \ifblank{#6}{}{
    {\large #6}\\%
  }%
  %% the actual title
  \ifx 1#5{\setstretch{1.2}\sc\huge #2\par}\fi
  \ifx 2#5{\Large #2\par}\fi
  \ifx 3#5{\large #2\par}\fi
  \end{center}
  %% If this is a level 1 title, empty pagestyle
  \ifx 1#5\thispagestyle{empty}\fi
  
  %% we define the header titles manually
  \setheaders{#3}{#4}
  
  %% moving on to a continuation macro to unpack the last 5 arguments
  \feastcontinued
}
\newcommand{\feastcontinued}[5]
{
  %% we name the last 5 arguments
  \def\oldrank{#1}%
  \def\newrank{#2}%
  \def\indexfeastname{#3}%
  \def\oldrubric{#4}%
  \def\newrubric{#5}%
  %% we index the feast if the indexing name is given
  \ifblank{#3}{}{
	\index[F]{\indexfeastname}
  }
  %% we typeset a two-column rank & rubrics block if one rank is filled in
  %% if the left rubric is filled in, we add a rule between the columns
  \ifblank{#5}{\def\ourrule{}}{\def\ourrule{rulebetween}}
  \ifblank{#1}{}{\vspace{-2mm}%
    \begin{parcolumns}[\ourrule]{2}
	\colchunk{%
      {\centering\oldrank\par}#4}%
	\colchunk{%
	  {\centering\newrank\par}#5}%
	\end{parcolumns}
	\vspace{2mm}
  }
}

\newcommand{\smalltitle}[1]{
  \needspace{7\baselineskip}
  \par{\centering\textbf{#1}\par}
}

\newcommand{\intermediatetitle}[1]{
  \needspace{10\baselineskip}
  \begin{center}
  {\large #1}
  \end{center}
 }

\newcommand{\nocturn}[1]{
  \intermediatetitle{In \Rnum{#1} Nocturno}
}

%% command to wrap printindex and set the headers for indices
\newcommand{\cprintindex}[2]{
	\setheaders{Indices}{#2}
	\pagestyle{fancy}
	\thispagestyle{empty}
	\printindex[#1]
}

%%%%%%%%%%%%%%% SUBFILES %%%%%%%%%%%%%%%

\usepackage{xr}
\usepackage{subfiles}

%% When we start a new subfile (new chapter), 
%% we start on a new page (with blank filling on the previous page) and create a corresponding label.
\newcommand{\customsubfile}[1]{\newpage\label{#1}\thispagestyle{empty}\subfile{#1}}