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;; geiser-edit.el -- visiting source files
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Wed Feb 11, 2009 21:07
;; 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:
;; Functions to access Scheme files and spots.
;;; Code:
(require 'geiser-completion)
(require 'geiser-eval)
(require 'geiser-base)
(require 'etags)
;;; Customization
(defmacro geiser-edit--define-custom-visit (var group doc)
`(defcustom ,var nil
,doc
:group ',group
:type '(choice (const :tag "Other window" window)
(const :tag "Other frame" frame)
(const :tag "Current window" nil))))
(geiser-edit--define-custom-visit
geiser-edit-symbol-method geiser
"How the new buffer is opened when invoking \\[geiser-edit-symbol-at-point]")
;;; Auxiliar functions:
(defun geiser-edit--visit-file (file method)
(cond ((eq method 'window) (find-file-other-window file))
((eq method 'frame) (find-file-other-frame file))
(t (find-file file))))
(defsubst geiser-edit--location-file (loc)
(cdr (assoc 'file loc)))
(defsubst geiser-edit--location-line (loc)
(cdr (assoc 'line loc)))
(defconst geiser-edit--def-re
(regexp-opt '("define" "defmacro" "define-macro" "define-syntax" "define*")))
(defsubst geiser-edit--def-re (symbol)
(format "(%s +(?%s\\_>" geiser-edit--def-re (regexp-quote (symbol-name symbol))))
(defsubst geiser-edit--symbol-re (symbol)
(format "\\_<%s\\_>" (regexp-quote (symbol-name symbol))))
(defun geiser-edit--goto-line (symbol line)
(if (numberp line)
(goto-line line)
(goto-char (point-min))
(when (or (re-search-forward (geiser-edit--def-re symbol) nil t)
(re-search-forward (geiser-edit--symbol-re symbol) nil t))
(goto-char (match-beginning 0)))))
(defun geiser-edit--try-edit (symbol ret)
(let* ((loc (geiser-eval--retort-result ret))
(file (geiser-edit--location-file loc))
(line (geiser-edit--location-line loc)))
(unless file (error "Couldn't find edit location"))
(unless (file-readable-p file) (error "Couldn't open '%s' for read" file))
(geiser-edit--visit-file file geiser-edit-symbol-method)
(geiser-edit--goto-line symbol line)))
;;; Commands:
(defun geiser-edit-symbol ()
"Asks for a symbol to edit, with completion."
(interactive)
(let* ((symbol (geiser-completion--read-symbol "Edit symbol: "
nil
geiser-edit--symbol-history))
(cmd `(:gs ((:ge symbol-location) ',symbol))))
(geiser-edit--try-edit symbol (geiser-eval--send/wait cmd))))
(defun geiser-edit-symbol-at-point (&optional arg)
"Opens a new window visiting the definition of the symbol at point.
With prefix, asks for the symbol to edit."
(interactive "P")
(let* ((symbol (or (and (not arg) (symbol-at-point))
(geiser-completion--read-symbol "Edit symbol: ")))
(cmd `(:gs ((:ge symbol-location) ',symbol)))
(marker (point-marker)))
(geiser-edit--try-edit symbol (geiser-eval--send/wait cmd))
(when marker (ring-insert find-tag-marker-ring marker))))
(defun geiser-edit-pop-edit-symbol-stack ()
"Pop back to where \\[geiser-edit-symbol-at-point] was last invoked."
(interactive)
(condition-case nil
(pop-tag-mark)
(error "No previous location for find symbol invocation")))
(provide 'geiser-edit)
;;; geiser-edit.el ends here
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