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;; geiser-xref.el -- utilities for cross-referencing
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Thu Mar 05, 2009 23:03
;; 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:
;; Obtaining cross-reference information (generic's methods, callers, etc.)
;;; Code:
(require' geiser-edit)
(require 'geiser-eval)
(require 'geiser-popup)
(require 'geiser-custom)
(require 'geiser-base)
(require 'button)
;;; Customization:
(defgroup geiser-xref nil
"Options for cross-referencing commands."
:group 'geiser)
(geiser-edit--define-custom-visit
geiser-xref-follow-link-method geiser-xref
"How to visit buffers when following xrefs.")
(geiser-custom--defface xref-link
'link geiser-xref "links in cross-reference buffers")
(geiser-custom--defface xref-header
'bold geiser-xref "headers in cross-reference buffers")
;;; Ref button:
(define-button-type 'geiser-xref--button
'action 'geiser-xref--button-action
'face 'geiser-font-lock-xref-link
'follow-link t)
(defun geiser-xref--button-action (button)
(let ((location (button-get button 'location))
(name (button-get button 'name)))
(when location
(geiser-edit--try-edit-location name location geiser-xref-follow-link-method))))
(defun geiser-xref--insert-button (xref)
(let* ((location (cdr (assoc 'location xref)))
(file (geiser-edit--location-file location))
(signature (cdr (assoc 'signature xref)))
(module (cdr (assoc 'module xref))))
(when signature
(insert "\t")
(if (stringp file)
(insert-text-button (format "%s" signature)
:type 'geiser-xref--button
'location location
'name (car signature)
'help-echo (format "%s in %s" (car signature) file))
(insert (format "%s" signature)))
(when (and (not (null module)) (not (eq '\#f module)))
(insert (format " in module %s" module)))
(newline))))
(defun geiser-xref--display-xrefs (header xrefs)
(geiser-xref--with-buffer
(erase-buffer)
(geiser--insert-with-face header 'geiser-font-lock-xref-header)
(newline 2)
(mapc 'geiser-xref--insert-button xrefs))
(geiser-xref--pop-to-buffer))
(defun geiser-xref--read-name (ask prompt)
(let ((name (or (and (not prompt) (symbol-at-point))
(read-string prompt nil nil (symbol-at-point)))))
(and name (format "%s" name))))
(defun geiser-xref--fetch-xrefs (ask kind rkind proc)
(let* ((name (geiser-xref--read-name (format "%s: " (capitalize kind)) ask))
(res (and name (geiser-eval--send/result
`(:eval ((:ge ,proc) (quote (:scm ,name))))))))
(if (or (not res) (not (listp res)))
(message "No %ss found for '%s'" rkind name)
(geiser-xref--display-xrefs (format "%ss for %s" rkind name) res))))
;;; Buffer and mode:
(geiser-popup--define xref "*Geiser xref*" geiser-xref-mode)
(defvar geiser-xref-mode-map
(let ((map (make-sparse-keymap)))
(suppress-keymap map)
(set-keymap-parent map button-buffer-map)
map))
(defun geiser-xref-mode ()
"Major mode for displaying cross-references.
\\{geiser-xref-mode-map}"
(interactive)
(kill-all-local-variables)
(buffer-disable-undo)
(use-local-map geiser-xref-mode-map)
(set-syntax-table scheme-mode-syntax-table)
(setq mode-name "Geiser Xref")
(setq major-mode 'geiser-xref-mode)
(setq buffer-read-only t))
;;; Commands:
(defun geiser-xref-generic-methods (&optional arg)
"Display information about known methods of a given generic.
With prefix, ask for the name of the generic."
(interactive "P")
(geiser-xref--fetch-xrefs arg "generic" "method" 'generic-methods))
(defun geiser-xref-callers (&optional arg)
"Display list of callers for procedure at point.
With prefix, ask for the procedure."
(interactive "P")
(geiser-xref--fetch-xrefs arg "procedure" "caller" 'callers))
(defun geiser-xref-callees (&optional arg)
"Display list of callees for procedure at point.
With prefix, ask for the procedure."
(interactive "P")
(geiser-xref--fetch-xrefs arg "procedure" "callee" 'callees))
(provide 'geiser-xref)
;;; geiser-xref.el ends here
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