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;;; base.scm -- Overhead transparencies, `base' engine.
;;;
;;; Copyright 2003, 2004 Manuel Serrano
;;; Copyright 2006 Ludovic Court�s <ludovic.courtes@laas.fr>
;;;
;;;
;;; 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 slide base)
:use-module (skribilo utils syntax)
:use-module (skribilo package slide)
:use-module (skribilo writer)
:use-module (skribilo engine)
:use-module (skribilo ast)
:autoload (skribilo output) (output)
:autoload (skribilo package base) (symbol color itemize item)
:use-module (srfi srfi-1)
:export (%slide-outline-title %slide-outline-itemize-symbols))
(fluid-set! current-reader %skribilo-module-reader)
;;;
;;; Simple markups.
;;;
(let ((be (lookup-engine-class 'base)))
;; slide-pause
(markup-writer 'slide-pause be
:action #f)
;; slide-vspace
(markup-writer 'slide-vspace be
:options '()
:action #f)
;; slide-embed
(markup-writer 'slide-embed be
:options '(:alt :geometry-opt)
:action (lambda (n e)
(output (markup-option n :alt) e)))
;; slide-record
(markup-writer 'slide-record be
:options '(:tag :play)
:action (lambda (n e)
(output (markup-body n) e)))
;; slide-play
(markup-writer 'slide-play be
:options '(:tag :color)
:action (lambda (n e)
(output (markup-option n :alt) e)))
;; slide-play*
(markup-writer 'slide-play* be
:options '(:tag :color :scolor)
:action (lambda (n e)
(output (markup-option n :alt) e))))
;;;
;;; Helper functions for the default topic/subtopic handling.
;;;
(define (make-subtopic-list node recurse?-proc make-entry-proc
itemize-symbols)
;; Make a list of the subtopic of `node'. Go recursive if `recurse?-proc'
;; returns true. `make-entry-proc' is passed a node and returns an entry
;; (a markup) for this node. `itemize-symbols' is a (circular) list
;; containing the symbols to be passed to `itemize'.
(let* ((subtopic? (lambda (n)
(or (is-markup? n 'slide-subtopic)
(is-markup? n 'slide))))
(subtopic-types (if (is-markup? node 'slide-topic)
'(slide-subtopic slide)
'(slide-topic))))
(if (subtopic? node)
'()
(apply itemize
`(,@(if (is-markup? (car itemize-symbols) 'symbol)
`(:symbol ,(car itemize-symbols))
'())
,@(map (lambda (t)
(item
(make-entry-proc t)
(if (recurse?-proc t)
(make-subtopic-list t recurse?-proc
make-entry-proc
(cdr itemize-symbols))
'())))
(filter (lambda (n)
(and (markup? n)
(member (markup-markup n)
subtopic-types)))
(markup-body node))))))))
(define (make-topic-list current-topic recurse? make-entry-proc)
;; Make a full topic list of the document which contains
;; `current-topic'. Here, `make-entry-proc' takes a topic node and
;; the current topic node as its arguments.
(let ((doc (ast-document current-topic)))
(make-subtopic-list doc
(lambda (t)
(and recurse? (eq? t current-topic)))
(lambda (t)
(make-entry-proc t current-topic))
%slide-outline-itemize-symbols)))
(define (make-topic-entry topic current-topic)
;; Produce an entry for `topic'. Colorize it based on the fact
;; that the current topic is `current-topic' (it may need to be
;; hightlighted).
(let ((title (markup-option topic :title))
(current? (eq? topic current-topic)))
(color :fg (if current? "#000000" "#666666")
(apply (if current? bold (lambda (x) x))
(list (markup-option topic :title))))))
;;;
;;; Default topic/subtopic handling.
;;;
;; Title for the automatically-generated outline slide.
(define %slide-outline-title "")
;; Circular list of symbols to be passed to `itemize' in outlines.
(define %slide-outline-itemize-symbols
(let loop ((names '(#t "-" "bullet" "->" "middot")))
(if (null? names)
'()
(cons (if (string? (car names))
(symbol (car names))
(car names))
(loop (cdr names))))))
(define (make-outline-slide topic engine)
(let ((parent-topic (if (is-markup? topic 'slide-topic)
topic
(find1-up (lambda (n)
(is-markup? n 'slide-topic))
topic))))
(output (slide :title %slide-outline-title :toc #f
:class (markup-class topic)
;; The mark below is needed for cross-referencing by PDF
;; bookmarks.
(if (markup-ident topic) (mark (markup-ident topic)) "")
(p (make-topic-list parent-topic #t
make-topic-entry)))
engine)))
(markup-writer 'slide-topic (lookup-engine-class 'base)
:options '(:title :outline? :class :ident)
:action (lambda (n e)
(if (markup-option n :outline?)
(make-outline-slide n e))
(output (markup-body n) e)))
(markup-writer 'slide-subtopic (lookup-engine-class 'base)
;; FIXME: Largely untested.
:options '(:title :outline? :class :ident)
:action (lambda (n e)
(if (markup-option n :outline?)
(make-outline-slide n e))
(output (markup-body n) e)))
;;; arch-tag: 1187ce0c-3ffc-4248-b68b-a7c77d6598b9
|
