From cfe32a6a09ce6af4b993e96fd5a3e2785bf6bb24 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès
Date: Sat, 19 Jan 2008 15:55:48 +0100
Subject: Add `web-book2' package.

---
 src/guile/skribilo/package/Makefile.am   |   2 +-
 src/guile/skribilo/package/web-book2.scm | 124 +++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+), 1 deletion(-)
 create mode 100644 src/guile/skribilo/package/web-book2.scm

(limited to 'src')

diff --git a/src/guile/skribilo/package/Makefile.am b/src/guile/skribilo/package/Makefile.am
index d6c0a28..191b102 100644
--- a/src/guile/skribilo/package/Makefile.am
+++ b/src/guile/skribilo/package/Makefile.am
@@ -3,7 +3,7 @@ dist_module_DATA =      acmproc.scm french.scm jfp.scm letter.scm	\
 			lncs.scm scribe.scm sigplan.scm			\
 			slide.scm web-article.scm web-book.scm		\
 			eq.scm pie.scm base.scm diff.scm		\
-			html-navtabs.scm
+			html-navtabs.scm web-book2.scm
 
 SUBDIRS = slide eq pie
 
diff --git a/src/guile/skribilo/package/web-book2.scm b/src/guile/skribilo/package/web-book2.scm
new file mode 100644
index 0000000..978d012
--- /dev/null
+++ b/src/guile/skribilo/package/web-book2.scm
@@ -0,0 +1,124 @@
+;;; web-book2.scm  --  Another web book style.
+;;;
+;;; Copyright 2008  Ludovic Courtès <ludo@gnu.org>
+;;;
+;;;
+;;; This program is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 2 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program; if not, write to the Free Software
+;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+;;; USA.
+
+(define-module (skribilo package web-book2)
+  :use-module (skribilo ast)
+  :use-module (skribilo engine)
+  :use-module (skribilo package base)
+
+  :use-module (skribilo utils syntax)
+  :use-module (skribilo utils keywords)
+
+  :use-module (srfi srfi-1)
+
+  :replace (chapter section subsection subsubsection))
+
+(fluid-set! current-reader %skribilo-module-reader)
+
+;;; Author: Ludovic Courtès
+;;;
+;;; Commentary:
+;;;
+;;; Another variant of the web book publishing.  This module is purely
+;;; functional, i.e., unlike `web-book', it doesn't modify the HTML engine
+;;; customs or writers.  Instead, it replaces the `chapter' and
+;;; `(sub)*section' markups with variants that produce a small table of
+;;; contents at the beginning of new files.
+;;;
+;;; Code:
+
+
+;;;
+;;; Small table-of-contents.
+;;;
+
+(define (section? n)
+  (and (container? n)
+       (memq (markup-markup n)
+             '(chapter section subsection subsubsection))))
+
+(define (make-small-toc n)
+  ;; Return a small table of contents, for use at the beginning of chapter N.
+  (define (make-uplink)
+    (let ((parent (ast-parent n)))
+      (and parent
+           (ref :handle (handle parent)
+                :text (list "<< up to ``"
+                            (markup-option parent :title)
+                            "''")))))
+
+  (let ((kids (filter section? (markup-body n))))
+    (p :class "small-toc"
+       (list
+        (and (not (null? kids))
+             (list "Table of Contents"
+                   (itemize
+                    (map (lambda (section)
+                           (item (ref :handle (handle section)
+                                      :text (markup-option section :title))))
+                         kids))))
+        (make-uplink)))))
+
+
+(define (in-file-of-its-own? n e)
+  ;; Return true if node N is in an HTML file of its own.
+  (and (engine-format? "html" e)
+       (section? n)
+       (or (markup-option n :file)
+           (let ((custom (symbol-append (markup-markup n) '-file)))
+             (engine-custom e custom)))))
+
+
+;;;
+;;; Overrides.
+;;;
+
+(define %base-package
+  (resolve-interface '(skribilo package base)))
+
+(define (make-overriding-markup markup)
+  ;; Override the `chapter' markup from the `base' package to allow the
+  ;; production of a small TOC at the beginning of each chapter.
+  (let ((real-markup (module-ref %base-package markup)))
+    (lambda args
+      ;;(format (current-error-port) "in new `~a'~%" markup)
+      (if (engine-format? "html")
+          (apply real-markup
+                 (append (concatenate (the-options args))
+                         (cons (resolve (lambda (n e env)
+                                          (let ((p (ast-parent n)))
+                                            (and (in-file-of-its-own? p e)
+                                                 (make-small-toc p)))))
+                               (the-body args))))
+          (apply real-markup args)))))
+
+(define chapter
+  (make-overriding-markup 'chapter))
+
+(define section
+  (make-overriding-markup 'section))
+
+(define subsection
+  (make-overriding-markup 'subsection))
+
+(define subsubsection
+  (make-overriding-markup 'subsubsection))
+
+;;; web-book2.scm ends here
-- 
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