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;;; web-book2.scm -- Another web book style.
;;; -*- coding: iso-8859-1 -*-
;;;
;;; Copyright 2008, 2012 Ludovic Courtès <ludo@gnu.org>
;;;
;;;
;;; This file is part of Skribilo.
;;;
;;; Skribilo 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 3 of the License, or
;;; (at your option) any later version.
;;;
;;; Skribilo 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 Skribilo. If not, see <http://www.gnu.org/licenses/>.
(define-module (skribilo package web-book2)
:use-module (skribilo ast)
:use-module (skribilo engine)
:use-module ((skribilo package base) :renamer (symbol-prefix-proc 'b:))
:use-module (skribilo utils syntax)
:use-module (skribilo utils keywords)
:use-module (srfi srfi-1)
:replace (chapter section subsection subsubsection))
(skribilo-module-syntax)
;;; 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 %small-toc-class
"small-toc")
(define (section? n)
(and (container? n)
(memq (markup-markup n)
'(chapter section subsection subsubsection))))
(define (make-small-toc n e)
;; Return a small table of contents, for use at the beginning of chapter N.
(define enclose
(if (engine-format? "html" e)
(lambda (toc)
(b:! (format #f "\n<div class=\"~a\">\n$1\n</div>" %small-toc-class)
toc))
(lambda (toc)
(b:p :class %small-toc-class toc))))
(define (make-uplink)
(let ((parent (ast-parent n)))
(and parent
(b:ref :handle (b:handle parent)
:text (list (b:symbol "uparrow") " "
(markup-option parent :title))))))
(let ((kids (filter section? (markup-body n))))
(enclose
(list
(and (not (null? kids))
(list "Contents"
(b:itemize
(map (lambda (section)
(b:item (b:ref :handle (b: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 (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.
(lambda args
;;(format (current-error-port) "in new '~a'~%" markup)
(if (engine-format? "html")
(apply markup
(append (concatenate (the-options args))
(cons (b:resolve (lambda (n e env)
(let ((p (ast-parent n)))
(and (in-file-of-its-own? p e)
(make-small-toc p e)))))
(the-body args))))
(apply markup args))))
;; FIXME: With this technique, source location info is lost.
(define chapter
(make-overriding-markup b:chapter))
(define section
(make-overriding-markup b:section))
(define subsection
(make-overriding-markup b:subsection))
(define subsubsection
(make-overriding-markup b:subsubsection))
;;; web-book2.scm ends here
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