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;; xref.scm -- cross-referencing utilities
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Mon Mar 02, 2009 02:37
;; This file 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.
;; This file 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, see <http://www.gnu.org/licenses/>.
;;; Comentary:
;; Procedures to locate symbols and their xrefs.
;;; Code:
(define-module (geiser xref)
#:export (symbol-location
generic-methods
callers
callees
find-file)
#:use-module (geiser utils)
#:use-module (geiser modules)
#:use-module (geiser doc)
#:use-module (oop goops)
#:use-module (system xref)
#:use-module (system vm program))
(define (symbol-location sym)
(cond ((symbol-module sym) => module-location)
(else '())))
(define (generic-methods sym)
(let* ((gen (symbol->object sym))
(methods (if (is-a? gen <generic>)
(generic-function-methods gen)
'())))
(filter (lambda (x) (not (null? x)))
(map (lambda (m)
(make-xref (method-procedure m) sym (symbol-module sym)))
methods))))
(define (make-xref proc name module)
(and proc
`((location . ,(or (program-location proc) (symbol-location name)))
(signature . ,(object-signature name proc))
(module . ,(or module '())))))
(define (program-location p)
(cond ((not (program? p)) #f)
((program-source p 0) =>
(lambda (s) (make-location (program-path p) (source:line s))))
((program-path p) =>
(lambda (s) (make-location (program-path p) #f)))
(else #f)))
(define (program-path p)
(let* ((mod (program-module p))
(name (and mod (module-name mod))))
(and name (module-filename name))))
(define (procedure-xref proc . mod-name)
(let ((proc-name (or (procedure-name proc) '<anonymous>))
(mod-name (if (null? mod-name)
(symbol-module name)
(car mod-name))))
(make-xref proc proc-name mod-name)))
(define (callers sym)
(let ((mod (symbol-module sym #t)))
(and mod
(apply append (map (lambda (procs)
(map (lambda (proc)
(procedure-xref proc (car procs)))
(cdr procs)))
(procedure-callers (cons mod sym)))))))
(define (callees sym)
(let ((obj (symbol->object sym)))
(and obj
(map procedure-xref (procedure-callees obj)))))
(define (find-file path)
(let loop ((dirs %load-path))
(if (null? dirs) #f
(let ((candidate (string-append (car dirs) "/" path)))
(if (file-exists? candidate) candidate (loop (cdr dirs)))))))
;;; xref.scm ends here
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