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;;; geiser-edit.el -- scheme edit locations
;; Copyright (C) 2009 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: Wed Feb 11, 2009 21:07
(require 'geiser-completion)
(require 'geiser-eval)
(require 'geiser-custom)
(require 'geiser-base)
(require 'etags)
;;; Customization:
(defmacro geiser-edit--define-custom-visit (var group doc)
`(geiser-custom--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-mode
"How the new buffer is opened when invoking \\[geiser-edit-symbol-at-point]
or following links in error buffers.")
(geiser-custom--defface error-link
'link geiser-debug "links in error buffers")
;;; 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))
((eq method 'noselect) (find-file-noselect file t))
(t (find-file file))))
(defsubst geiser-edit--location-name (loc)
(cdr (assoc 'name loc)))
(defsubst geiser-edit--location-file (loc)
(cdr (assoc 'file loc)))
(defsubst geiser-edit--to-number (x)
(cond ((numberp x) x)
((stringp x) (string-to-number x))))
(defsubst geiser-edit--location-line (loc)
(geiser-edit--to-number (cdr (assoc 'line loc))))
(defsubst geiser-edit--location-column (loc)
(geiser-edit--to-number (cdr (assoc 'column loc))))
(defsubst geiser-edit--make-location (name file line column)
`((name . ,name) (file . ,file) (line . ,line) (column . ,column)))
(defconst geiser-edit--def-re
(regexp-opt '("define"
"defmacro"
"define-macro"
"define-syntax"
"-define-syntax"
"-define"
"define*"
"define-method"
"define-class"
"define-struct")))
(defconst geiser-edit--def-re*
(regexp-opt '("define-syntaxes" "define-values")))
(defsubst geiser-edit--def-re (thing)
(format "(%s +(?%s\\_>"
geiser-edit--def-re
(regexp-quote (format "%s" thing))))
(defsubst geiser-edit--def-re* (thing)
(format "(%s +([^)]*?\\_<%s\\_>"
geiser-edit--def-re*
(regexp-quote (format "%s" thing))))
(defsubst geiser-edit--symbol-re (thing)
(format "\\_<%s\\_>" (regexp-quote (format "%s" thing))))
(defun geiser-edit--goto-line (symbol line)
(goto-char (point-min))
(if (numberp line)
(forward-line (max 0 (1- line)))
(goto-char (point-min))
(when (or (re-search-forward (geiser-edit--def-re symbol) nil t)
(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-location (symbol loc &optional method)
(let ((symbol (or (geiser-edit--location-name loc) symbol))
(file (geiser-edit--location-file loc))
(line (geiser-edit--location-line loc))
(col (geiser-edit--location-column loc)))
(unless file (error "Couldn't find edit location for '%s'" symbol))
(unless (file-readable-p file) (error "Couldn't open '%s' for read" file))
(geiser-edit--visit-file file (or method geiser-edit-symbol-method))
(geiser-edit--goto-line symbol line)
(when col
(beginning-of-line)
(forward-char col))
(cons (current-buffer) (point))))
(defsubst geiser-edit--try-edit (symbol ret &optional method)
(geiser-edit--try-edit-location symbol (geiser-eval--retort-result ret) method))
;;; Links
(define-button-type 'geiser-edit--button
'action 'geiser-edit--button-action
'face 'geiser-font-lock-error-link
'follow-link t)
(defun geiser-edit--button-action (button)
(let ((loc (button-get button 'geiser-location)))
(when loc (geiser-edit--try-edit-location nil loc))))
(defun geiser-edit--make-link (beg end file line col)
(make-button beg end
:type 'geiser-edit--button
'geiser-location
(geiser-edit--make-location 'error file line col)
'help-echo "Go to error location"))
;;; Commands:
(defvar geiser-edit--symbol-history nil)
(defun geiser-edit-symbol (symbol &optional method)
"Asks for a symbol to edit, with completion."
(interactive (list (geiser-completion--read-symbol "Edit symbol: "
nil
geiser-edit--symbol-history)))
(let ((cmd `(:eval ((:ge symbol-location) ',symbol))))
(geiser-edit--try-edit symbol (geiser-eval--send/wait cmd) method)))
(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 `(:eval ((: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")))
(defun geiser-edit-module (module &optional method)
"Asks for a module and opens it in a new buffer."
(interactive (list (geiser-completion--read-module)))
(let ((cmd `(:eval ((:ge module-location) (:module ,module)))))
(geiser-edit--try-edit module (geiser-eval--send/wait cmd) method)))
(provide 'geiser-edit)
;;; geiser-edit.el ends here
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