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;;; engine.skb -- The description of the Skribe engines
;;;
;;; Copyright 2003, 2004 Manuel Serrano
;;;
;;;
;;; 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.
(cond-expand
(guile
(define *engine-src* "skribilo/engine.scm")
(define *types-src* #f))
(bigloo
(define *engine-src* "../src/bigloo/engine.scm")
(define *types-src* "../src/bigloo/types.scm"))
(stklos
(define *engine-src* "../src/stklos/engine.stk")
(define *types-src* "../src/stklos/types.stk")))
;*---------------------------------------------------------------------*/
;* Engine */
;*---------------------------------------------------------------------*/
(chapter :title "Engines"
(p [When Skribe produces a document in a given format, it uses a
specialize engine. For instance, when a Web page is made from a Skribe
document, the HTML engine is used. The engines provided by Skribe are
given below:])
(resolve (lambda (n e env)
(let* ((current-chapter (ast-chapter n))
(body (map (lambda (x) (if (pair? x) (car x) x))
(markup-body current-chapter)))
(sects (filter (lambda (x) (is-markup? x 'section))
body)))
(itemize
(map (lambda (x)
(let ((title (markup-option x :title)))
(item (ref :text title :section title))))
sects)))))
(section :title "Functions dealing with engines"
(subsection :title "Creating engines"
(p [The function ,(code "make-engine") creates a brand new engine.])
(doc-markup 'make-engine
'((ident [The name (a symbol) of the new engine.])
(:version [The version number.])
(:format [The output format (a string) of this engine.])
(:filter [A string filter (a function).])
(:delegate [A delegate engine.])
(:symbol-table [The engine symbol table.])
(:custom [The engine custom list.])
(:info [Miscellaneous.]))
:common-args '()
:skribe-source? #f
:source *engine-src*
:idx *function-index*)
(p [The function ,(code "copy-engine") duplicates an existing engine.])
(doc-markup 'copy-engine
'((ident [The name (a symbol) of the new engine.])
(e [The old engine to be duplicated.])
(:version [The version number.])
(:filter [A string filter (a function).])
(:delegate [A delegate engine.])
(:symbol-table [The engine symbol table.])
(:custom [The engine custom list.]))
:common-args '()
:skribe-source? #f
:source *engine-src*
:idx *function-index*))
(subsection :title "Retrieving engines"
(p [The ,(code "find-engine") function searches in the list of defined
engines. It returns an ,(code "engine") object on success and ,(code "#f")
on failure.])
(doc-markup 'find-engine
'((id [The name (a symbol) of the engine to be searched.])
(:version [An optional version number for the searched engine.]))
:common-args '()
:skribe-source? #f
:source *engine-src*
:idx *function-index*))
(subsection :title "Engine accessors"
(p [The predicate ,(code "engine?") returns ,(code "#t") if its
argument is an engine. Otherwise, it returns ,(code "#f"). In other words,
,(code "engine?") returns ,(code "#t") for objects created by
,(code "make-engine"), ,(code "copy-engine"), and ,(code "find-engine").])
(doc-markup 'engine?
'((obj [The checked object.]))
:common-args '()
:skribe-source? #f
:source *engine-src*
:idx *function-index*)
(p [The following functions return information about engines.])
(doc-markup 'engine-ident
'((obj [The engine.]))
:common-args '()
:others '(engine-format engine-customs engine-filter engine-symbol-table)
:skribe-source? #f
:source *engine-src*
:idx *function-index*))
(subsection :title "Engine customs"
(p [Engine customs are locations where dynamic informations relative
to engines can be stored. Engine custom can be seen a global variables that
are specific to engines. The function ,(code "engine-custom") returns the
value of a custom or ,(code "#f") if that custom is not defined. The
function ,(code "engine-custom-set!") defines or sets a new value for
a custom.])
(doc-markup 'engine-custom
`((e ,[The engine (as returned by
,(ref :mark "find-engine" :text (code "find-engine"))).])
(id [The name of the custom.]))
:common-args '()
:skribe-source? #f
:source *engine-src*
:idx *function-index*)
(doc-markup 'engine-custom-set!
`((e ,[The engine (as returned by
,(ref :mark "find-engine" :text (code "find-engine"))).])
(id [The name of the custom.])
(val [The new value of the custom.]))
:common-args '()
:skribe-source? #f
:source *engine-src*
:idx *function-index*)))
;; existing engines
(include "htmle.skb")
(include "latexe.skb")
(include "xmle.skb"))
|
