Initial commit: Klammertext source distribution

Curated source subset assembled by klammertext-dev's doc/make_dist.sh: the Klammermachine (mac), the Standard Klammer Set (sks), the commands (com), editor plugins and install guides (doc), a test subset (tst), and lib/bin placeholders. Builds with 'make -C com'.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

sks/section/sty/headerfooter.sty

@@ -0,0 +1,143 @@
+% Header and footer definitions for the SKS @document klammer.
+%
+% Three page style sets, one per document structure:
+%
+%   plain structure:   No headers.  Centered page number in footer.
+%   article structure: No headers.  Centered page number in footer.
+%                      First page has no header (same as regular pages).
+%   book structure:    Verso header: chapter number + title.
+%                      Recto header: section number + title.
+%                      Page number in outer header margin.
+%                      No footer.  Chapter-opening pages get centered
+%                      page number in footer and no header.
+%
+% Special styles used across structures:
+%   \pagestyle{empty}  — title pages, copyright pages, part pages, blank pages
+%
+% The style names use a "sks" prefix to avoid clashing with LaTeX's
+% built-in page style names:
+%   \pagestyle{sksplain}, \pagestyle{sksarticle}, \pagestyle{sksbook}
+%
+% titlesec's pagestyles option (loaded by titles.sty) provides \newpagestyle,
+% \sethead, \setfoot, and the automatic marks \chaptertitle, \sectiontitle,
+% \subsectiontitle.
+
+\usepackage{ifthen}
+
+% --- Font for header/footer text ---
+
+\newcommand{\hdrfont}[1]{{\sffamily\scalefont{.9}{#1}}}
+
+% --- Running head content ---
+%
+% These commands produce the running head text, using titlesec's automatic
+% mark variables.  They suppress output when the counter is zero (before
+% the first heading of that level has appeared).
+%
+% The \sect dispatch from titles.sty shifts heading levels between book
+% and article classes: in book class, \sA expands to \chapter and the
+% top-level counter is \thechapter; in article class, \sA expands to
+% \section and the top-level counter is \thesection.  The running head
+% commands follow the same shift.
+
+\ifthenelse{\equal{\documentisbook}{true}}{%
+  \newcommand{\runningchapter}{%
+    \ifthenelse{\equal{0}{\thechapter}}{}{\hdrfont{\thechapter~~\chaptertitle}}}
+  \newcommand{\runningsection}{%
+    \ifthenelse{\equal{0}{\thesection}}{}{\hdrfont{\thesection~~\sectiontitle}}}
+}{%
+  \newcommand{\runningchapter}{%
+    \ifthenelse{\equal{0}{\thesection}}{}{\hdrfont{\thesection~~\sectiontitle}}}
+  \newcommand{\runningsection}{%
+    \ifthenelse{\equal{0}{\thesubsection}}{}{\hdrfont{\thesubsection~~\subsectiontitle}}}
+}
+
+% --- Plain structure ---
+%
+% No headers, centered page number in footer, no rules.
+
+\newpagestyle{sksplain}{%
+  \ifdefined\documentbottom
+    \setfoot{\hdrfont{\documentbottom}}{}{\hdrfont{\thepage}}%
+  \else
+    \setfoot{}{\hdrfont{\thepage}}{}%
+  \fi
+}
+
+% --- Article structure ---
+%
+% Same as plain: no headers, centered page number in footer, no rules.
+% Defined as a separate style so that it can be extended independently
+% (e.g., adding author/title running heads for longer articles).
+
+\newpagestyle{sksarticle}{%
+  \ifdefined\documentbottom
+    \setfoot{\hdrfont{\documentbottom}}{}{\hdrfont{\thepage}}%
+  \else
+    \setfoot{}{\hdrfont{\thepage}}{}%
+  \fi
+}
+
+% --- Book structure ---
+%
+% Twoside layout with running heads and page numbers in the outer margin.
+% Verso (even): chapter title in header.
+% Recto (odd): section title in header.
+% No footer on regular pages.
+
+\newpagestyle{sksbook}{%
+  \sethead[\hdrfont{\thepage}]%
+          []%
+          [\runningchapter]%
+          {\runningsection}%
+          {}%
+          {\hdrfont{\thepage}}%
+  \ifdefined\documentbottom
+    \setfoot[\hdrfont{\documentbottom}]%
+            []%
+            []%
+            {}%
+            {}%
+            {\hdrfont{\documentbottom}}%
+  \fi
+}
+
+% --- Book opening style ---
+%
+% \chapter internally calls \thispagestyle{plain}, so we must override
+% LaTeX's built-in plain style for book structure.  For plain and article
+% structures, the override is harmless (plain is not used as the main
+% page style, and this matches the centered-page-number convention).
+
+\ifthenelse{\equal{\documentisbook}{true}}{%
+  \renewpagestyle{plain}{%
+    \ifdefined\documentbottom
+      \setfoot{\hdrfont{\documentbottom}}{}{\hdrfont{\thepage}}%
+    \else
+      \setfoot{}{}{\hdrfont{\thepage}}%
+    \fi
+  }
+}{%
+  \renewpagestyle{plain}{%
+    \ifdefined\documentbottom
+      \setfoot{\hdrfont{\documentbottom}}{}{\hdrfont{\thepage}}%
+    \else
+      \setfoot{}{\hdrfont{\thepage}}{}%
+    \fi
+  }
+}
+
+% --- Noheader (compatibility) ---
+%
+% Used by toc.sty for TOC chapter entries.  No running heads, centered
+% page number in footer.
+
+\newpagestyle{noheader}{%
+  \ifdefined\documentbottom
+    \setfoot{\hdrfont{\documentbottom}}{}{\hdrfont{\thepage}}%
+  \else
+    \setfoot{}{\hdrfont{\thepage}}{}%
+  \fi
+}
+
+\write0{Headers and page styles defined}