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;;;;
;;;; Standard Library
;;;;
;;;;
;;;;           Author: Erick Gallesio [eg@essi.fr]
;;;;    Creation date: 21-Nov-2003 07:20 (eg)
;;;; Last file update: 21-Nov-2003 10:17 (eg)


(chapter :title "Standard Library" 

   (p [This section describes the Skribe standard library])

;;;
(section :title "File functions"
   
   (p [The function ,(code "include") is particularily useful to spread a
long document amongst several files.])
   
   (doc-markup 'include
	       '((file [The file containing the nodes to be included. 
These nodes are included in the document in place of the ,(code "include") 
call.]))
	       :common-args '()
	       :see-also '(skribe-load skribe-path skribe-path-set!)
	       :idx *function-index*)
   
   (p [The given file is searched in the current 
,(ref :mark "skribe-path" :text "Skribe path")])
   
   (p [The function ,(code "skribe-load") is generally used to load in the
Skribe memory, a package or an extension. In general the prelude of a 
Skribe document (the expressions placed before the ,(markup-ref "document")
call) contains several ,(code "skribe-load"). The file is search
in the ,(ref :mark "skribe-path" :text "Skribe path").])
   
   (doc-markup 'skribe-load
	       `((file [The file containing the expressions to be loaded.])
		 (:engine [The engine used to evaluate the expressions.])
		 (:path ,[The optional path where to find the file. The default
                          path is ,(markup-ref "skribe-path").])
		 (#!rest opt... [Additional user options.]))
               :skribe-source? #f
	       :source "skribilo/evaluator.scm"
	       :common-args '()
	       :see-also '(skribe-load-options skribe-path skribe-path-set!)
	       :idx *function-index*)
   
   (p [Returns the user of options of the last call to 
,(markup-ref "skribe-load")])
   (doc-markup 'skribe-load-options
	       '()
               :skribe-source? #f-
	       :source "skribilo/evaluator.scm"
	       :common-args '()
	       :see-also '(skribe-load)
	       :idx *function-index*)
   
   (p [Skribe provides functions for dealing with paths. These functions
are related to the path that can be specified on the command line,
when the Skribe compiler is invoked (see Chapter 
,(ref :chapter "Skribe compiler").)])
   
   (doc-markup 'skribe-path
	       '()
               :skribe-source? #f
	       :source "skribilo/evaluator.scm"
	       :common-args '()
	       :others '(skribe-image-path skribe-bib-path skribe-source-path)
	       :see-also '(include skribe-load image source bibliography skribe-path-set! skribe-image-path-set! skribe-bib-path-set! skribe-source-path-set!)
	       :idx *function-index*)
   
   (p [The function ,(code "skribe-path-set!") sets a new path.])
   (doc-markup 'skribe-path-set!
	       '((path [A list of strings which is the new Skribe search path.]))
               :skribe-source? #f
	       :source "skribilo/evaluator.scm"
	       :common-args '()
	       :others '(skribe-image-path-set! skribe-bib-path-set! skribe-source-path-set!)
	       :see-also '(skribe-path skribe-image-path skribe-bib-path skribe-source-path)
	       :idx *function-index*))
   
;;; Misc   
(section :title "Misc. Functions"
   
   (p [The function ,(code "skribe-release") returns the Skribe version 
as a string])
   (doc-markup 'skribe-release
	       '()
	       :common-args '()
	       :source #f
	       :def '(define (skribe-release) ...)
	       :idx *function-index*)
   
   (p [For instance, the following piece of code:])
   (prgm :language skribe 
	 "[This manual documents the ,(bold (skribe-release)) Skribe release]")
   (p [produces the following output])
   (disp [This manual documents the ,(bold (skribe-release)) Skribe release]))
   
   (p [The function ,(code "skribe-configure") accesses the whole
Skribe configuration. It can be used to ,(emph "get") or ,(emph "check")
the configuration.])
   
   (doc-markup 'skribe-configure
	       '((opt... [Optional arguments.]))
	       :common-args '()
	       :source #f
	       :def '(define (skribe-configure . opt...) ...)
	       :idx *function-index*)
   
   (p [The function ,(code "skribe-configure") can be used in three distinct 
ways depending on the number of provided arguments:])
   
   (enumerate
      (item [If no argument is provided, ,(code "skribe-configure") returns 
a fresh list of Skribe configuration.])
      (item [If one keyword argument is provided, ,(code "skribe-configure") 
returns the value associated with this keyword in the configuration list. 
If this value does not exist, it returns the symbol ,(code "void").])
      (item [(code "skribe-configure") is invoked with a list composed 
of ,(emph "keyword") ,(emph "value"). The actual configuration is checked 
against the provided values. Values are compared with ,(code "equal") except 
if the value to check has to be compared with a procedure. In that particular 
case the value of the check is the value produces by ,(emph "applying") the 
function to the actual value. The result of ,(code "skribe-configure") is a 
boolean.]))
   
   (p [Here are some examples.])
   (prgm :language skribe [
;; fetch the whole configuration list
(skribe-configure) 

;; fetch the release number
(skribe-configure :release) 

;; test if the release number is 1.0b
(skribe-configure :release "1.0b") 

;; test if the release number is greater or equal than "1.0b"
(skribe-configure :release (lambda (v) (string>=? v "1.0b")))

;; test if the release number is greater or equal than "1.0b"
;; and the implementation is bigloo
(skribe-configure :release (lambda (v) (string>=? v "1.0b")) :scheme "bigloo")])
   
   (p [The function ,(code "skribe-enforce-configure") checks for the Skribe
configuration. In case of mismatch, it raises an error. The syntax of the
arguments if the same as that of ,(code "skribe-configure") when invoked
with several arguments.])
   
   (doc-markup 'skribe-enforce-configure
	       '((opt... [Optional arguments.]))
	       :common-args '()
	       :source #f
	       :def '(define (skribe-enforce-configure . opt...) ...)
	       :idx *function-index*))