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;;; xref.scm -- cross-referencing utilities
;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Mon Mar 02, 2009 02:37
(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 (let ((obj (symbol->object sym)))
(or (and (program? obj) (program-location obj))
'())))))
(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 s #f)))
(else #f)))
(define (program-path p)
(let* ((mod (program-module p))
(name (and (module? mod) (module-name mod))))
(and name (module-path name))))
(define (procedure-xref proc . mod-name)
(let* ((proc-name (or (procedure-name proc) '<anonymous>))
(mod-name (if (null? mod-name)
(symbol-module proc-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)))))))
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