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+;;;; source.scm -- Highlighting source files.
+;;;;
+;;;; Copyright 2003, 2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
+;;;; Copyright 2005, 2006 Ludovic Courtès <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 source)
+ :export (<language> language? language-extractor language-fontifier
+ source-read-lines source-read-definition source-fontify)
+
+ :use-module (srfi srfi-35)
+ :autoload (srfi srfi-34) (raise)
+ :autoload (srfi srfi-13) (string-prefix-length)
+ :autoload (skribilo condition) (&file-search-error &file-open-error)
+
+ :use-module (skribilo utils syntax)
+ :use-module (skribilo parameters)
+ :use-module (skribilo lib)
+ :use-module (oop goops)
+ :use-module (ice-9 rdelim))
+
+
+(fluid-set! current-reader %skribilo-module-reader)
+
+
+;;;
+;;; Class definition.
+;;;
+
+(define-class <language> ()
+ (name :init-keyword :name :init-value #f :getter langage-name)
+ (fontifier :init-keyword :fontifier :init-value #f
+ :getter language-fontifier)
+ (extractor :init-keyword :extractor :init-value #f
+ :getter language-extractor))
+
+(define (language? obj)
+ (is-a? obj <language>))
+
+
+
+;*---------------------------------------------------------------------*/
+;* source-read-lines ... */
+;*---------------------------------------------------------------------*/
+(define (source-read-lines file start stop tab)
+ (let ((p (search-path (*source-path*) file)))
+ (if (or (not (string? p)) (not (file-exists? p)))
+ (raise (condition (&file-search-error (file-name file)
+ (path (*source-path*)))))
+ (with-input-from-file p
+ (lambda ()
+ (if (> (*verbose*) 0)
+ (format (current-error-port) " [source file: ~S]\n" p))
+ (let ((startl (if (string? start) (string-length start) -1))
+ (stopl (if (string? stop) (string-length stop) -1)))
+ (let loop ((l 0) ;; In Guile, line nums are 0-origined.
+ (armedp (not (or (integer? start) (string? start))))
+ (s (read-line))
+ (r '()))
+ (cond
+ ((or (eof-object? s)
+ (and (integer? stop) (> l stop))
+ (and (string? stop)
+ (= (string-prefix-length stop s) stopl)))
+ (apply string-append (reverse! r)))
+ (armedp
+ (loop (+ l 1)
+ #t
+ (read-line)
+ (cons* "\n" (untabify s tab) r)))
+ ((and (integer? start) (>= l start))
+ (loop (+ l 1)
+ #t
+ (read-line)
+ (cons* "\n" (untabify s tab) r)))
+ ((and (string? start)
+ (= (string-prefix-length start s) startl))
+ (loop (+ l 1) #t (read-line) r))
+ (else
+ (loop (+ l 1) #f (read-line) r))))))))))
+
+;*---------------------------------------------------------------------*/
+;* untabify ... */
+;*---------------------------------------------------------------------*/
+(define (untabify obj tab)
+ (if (not tab)
+ obj
+ (let ((len (string-length obj))
+ (tabl tab))
+ (let loop ((i 0)
+ (col 1))
+ (cond
+ ((= i len)
+ (let ((nlen (- col 1)))
+ (if (= len nlen)
+ obj
+ (let ((new (make-string col #\space)))
+ (let liip ((i 0)
+ (j 0)
+ (col 1))
+ (cond
+ ((= i len)
+ new)
+ ((char=? (string-ref obj i) #\tab)
+ (let ((next-tab (* (/ (+ col tabl)
+ tabl)
+ tabl)))
+ (liip (+ i 1)
+ next-tab
+ next-tab)))
+ (else
+ (string-set! new j (string-ref obj i))
+ (liip (+ i 1) (+ j 1) (+ col 1)))))))))
+ ((char=? (string-ref obj i) #\tab)
+ (loop (+ i 1)
+ (* (/ (+ col tabl) tabl) tabl)))
+ (else
+ (loop (+ i 1) (+ col 1))))))))
+
+;*---------------------------------------------------------------------*/
+;* source-read-definition ... */
+;*---------------------------------------------------------------------*/
+(define (source-read-definition file definition tab lang)
+ (let ((p (search-path (*source-path*) file)))
+ (cond
+ ((not (language-extractor lang))
+ (skribe-error 'source
+ "The specified language has not defined extractor"
+ (slot-ref lang 'name)))
+
+ ((or (not p) (not (file-exists? p)))
+ (raise (condition (&file-search-error (file-name file)
+ (path (*source-path*))))))
+
+ (else
+ (let ((ip (open-input-file p)))
+ (if (> (*verbose*) 0)
+ (format (current-error-port) " [source file: ~S]\n" p))
+ (if (not (input-port? ip))
+ (raise (condition (&file-open-error (file-name p))))
+ (unwind-protect
+ (let ((s ((language-extractor lang) ip definition tab)))
+ (if (not (string? s))
+ (skribe-error 'source
+ "Can't find definition"
+ definition)
+ s))
+ (close-input-port ip))))))))
+
+;*---------------------------------------------------------------------*/
+;* source-fontify ... */
+;*---------------------------------------------------------------------*/
+(define (source-fontify o language)
+ (define (fontify f o)
+ (cond
+ ((string? o) (f o))
+ ((pair? o) (map (lambda (s) (if (string? s) (f s) (fontify f s))) o))
+ (else o)))
+ (let ((f (language-fontifier language)))
+ (if (procedure? f)
+ (fontify f o)
+ o)))
+
+;*---------------------------------------------------------------------*/
+;* split-string-newline ... */
+;*---------------------------------------------------------------------*/
+(define (split-string-newline str)
+ (let ((l (string-length str)))
+ (let loop ((i 0)
+ (j 0)
+ (r '()))
+ (cond
+ ((= i l)
+ (if (= i j)
+ (reverse! r)
+ (reverse! (cons (substring str j i) r))))
+ ((char=? (string-ref str i) #\newline)
+ (loop (+ i 1)
+ (+ i 1)
+ (if (= i j)
+ (cons 'eol r)
+ (cons* 'eol (substring str j i) r))))
+ ((and (char=? (string-ref str i) #\cr)
+ (< (+ i 1) l)
+ (char=? (string-ref str (+ i 1)) #\newline))
+ (loop (+ i 2)
+ (+ i 2)
+ (if (= i j)
+ (cons 'eol r)
+ (cons* 'eol (substring str j i) r))))
+ (else
+ (loop (+ i 1) j r))))))
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