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+;; geiser-racket.el -- geiser support for Racket scheme
+
+;; 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: Sat Apr 25, 2009 21:13
+
+
+
+(require 'geiser-edit)
+(require 'geiser-doc)
+(require 'geiser-eval)
+(require 'geiser-syntax)
+(require 'geiser-custom)
+(require 'geiser-base)
+
+
+;;; Customization:
+
+(defgroup geiser-racket nil
+ "Customization for Geiser's Racket flavour."
+ :group 'geiser)
+
+(geiser-custom--defcustom geiser-racket-binary
+ (cond ((eq system-type 'windows-nt) "Racket.exe")
+ ((eq system-type 'darwin) "racket")
+ (t "racket"))
+ "Name to use to call the mzscheme executable when starting a REPL."
+ :type '(choice string (repeat string))
+ :group 'geiser-racket)
+
+(geiser-custom--defcustom geiser-racket-collects nil
+ "A list of paths to be added to mzscheme's collection directories."
+ :type '(repeat file)
+ :group 'geiser-racket)
+
+(geiser-custom--defcustom geiser-racket-init-file "~/.racket-geiser"
+ "Initialization file with user code for the mzscheme REPL."
+ :type 'string
+ :group 'geiser-racket)
+
+
+
+;;; REPL support:
+
+(defun geiser-racket--binary ()
+ (if (listp geiser-racket-binary)
+ (car geiser-racket-binary)
+ geiser-racket-binary))
+
+(defun geiser-racket--parameters ()
+ "Return a list with all parameters needed to start mzscheme.
+This function uses `geiser-racket-init-file' if it exists."
+ (let ((init-file (and (stringp geiser-racket-init-file)
+ (expand-file-name geiser-racket-init-file))))
+ `("-i" "-q"
+ "-S" ,(expand-file-name "racket/" geiser-scheme-dir)
+ ,@(apply 'append (mapcar (lambda (p) (list "-S" p)) geiser-racket-collects))
+ ,@(and (listp geiser-racket-binary) (cdr geiser-racket-binary))
+ ,@(and init-file (file-readable-p init-file) (list "-f" init-file))
+ "-f" ,(expand-file-name "racket/geiser.rkt" geiser-scheme-dir))))
+
+(defconst geiser-racket--prompt-regexp "^=?\\(mzscheme\\|racket\\)@[^ ]*?> ")
+
+
+;;; Evaluation support:
+
+(defun geiser-racket--language ()
+ (save-excursion
+ (goto-char (point-min))
+ (if (re-search-forward
+ "^\\(?:#lang\\|(module +[^ ]+?\\) +\\([^ ]+?\\|([^)]+)\\) *$" nil t)
+ (car (geiser-syntax--read-from-string (match-string-no-properties 1)))
+ :f)))
+
+(defun geiser-racket--geiser-procedure (proc)
+ (if (memq proc '(eval compile))
+ `((dynamic-require 'geiser 'geiser:eval) ',(geiser-racket--language))
+ `(dynamic-require 'geiser ',(intern (format "geiser:%s" proc)))))
+
+(defconst geiser-racket--module-re
+ "^(module +\\([^ ]+\\)")
+
+(defun geiser-racket--explicit-module ()
+ (save-excursion
+ (goto-char (point-min))
+ (and (re-search-forward geiser-racket--module-re nil t)
+ (ignore-errors
+ (car (geiser-syntax--read-from-string
+ (match-string-no-properties 1)))))))
+
+(defsubst geiser-racket--implicit-module ()
+ (save-excursion
+ (goto-char (point-min))
+ (if (re-search-forward "^#lang " nil t)
+ (buffer-file-name)
+ :f)))
+
+(defun geiser-racket--get-module (&optional module)
+ (cond ((and (null module) (buffer-file-name)))
+ ;; (geiser-racket--explicit-module)
+ ((null module) (geiser-racket--implicit-module))
+ ((symbolp module) module)
+ ((and (stringp module) (file-name-absolute-p module)) module)
+ ((stringp module) (intern module))
+ (t nil)))
+
+(defun geiser-racket--symbol-begin (module)
+ (save-excursion (skip-syntax-backward "^-()>") (point)))
+
+(defun geiser-racket--enter-command (module)
+ (and (stringp module) (format "(enter! (file %S))" module)))
+
+(defconst geiser-racket--binding-forms
+ '(for for/list for/hash for/hasheq for/and for/or
+ for/lists for/first for/last for/fold))
+
+(defconst geiser-racket--binding-forms*
+ '(for* for*/list for*/lists for*/hash for*/hasheq for*/and
+ for*/or for*/first for*/last for*/fold))
+
+;;; External help
+
+(defsubst geiser-racket--get-help (symbol module)
+ (geiser-eval--send/wait
+ `(:eval (get-help ',symbol (:module ,module)) geiser/autodoc)))
+
+(defun geiser-racket--external-help (id module)
+ (message "Requesting help for '%s'..." id)
+ (let ((out (geiser-eval--retort-output
+ (geiser-racket--get-help id module))))
+ (when (and out (string-match " but provided by:\n +\\(.+\\)\n" out))
+ (geiser-racket--get-help symbol (match-string 1 out))))
+ (minibuffer-message "%s done" (current-message))
+ t)
+
+
+;;; Error display
+
+(defconst geiser-racket--file-rxs
+ '("^\\([^:\n\"]+\\):\\([0-9]+\\):\\([0-9]+\\)"
+ "path:\"?\\([^>\"\n]+\\)\"?>"
+ "module: \"\\([^>\"\n]+\\)\""))
+
+(defun geiser-racket--find-files (rx)
+ (save-excursion
+ (while (re-search-forward rx nil t)
+ (geiser-edit--make-link (match-beginning 1)
+ (match-end 1)
+ (match-string 1)
+ (match-string 2)
+ (match-string 3)))))
+
+(defun geiser-racket--display-error (module key msg)
+ (when key
+ (insert "Error: ")
+ (geiser-doc--insert-button key nil 'racket)
+ (newline 2))
+ (when msg
+ (let ((p (point)))
+ (insert msg)
+ (when key
+ (let ((end (point)))
+ (goto-char p)
+ (mapc 'geiser-racket--find-files geiser-racket--file-rxs)
+ (goto-char end)
+ (newline)))))
+ t)
+
+
+;;; Trying to ascertain whether a buffer is mzscheme scheme:
+
+(defun geiser-racket--guess ()
+ (or (save-excursion
+ (goto-char (point-min))
+ (re-search-forward "#lang " nil t))
+ (geiser-racket--explicit-module)))
+
+
+;;; Implementation definition:
+
+(define-geiser-implementation racket
+ (unsupported-procedures '(callers callees generic-methods))
+ (binary geiser-racket--binary)
+ (arglist geiser-racket--parameters)
+ (startup)
+ (prompt-regexp geiser-racket--prompt-regexp)
+ (marshall-procedure geiser-racket--geiser-procedure)
+ (find-module geiser-racket--get-module)
+ (enter-command geiser-racket--enter-command)
+ (find-symbol-begin geiser-racket--symbol-begin)
+ (display-error geiser-racket--display-error)
+ (display-help geiser-racket--external-help)
+ (check-buffer geiser-racket--guess)
+ (binding-forms geiser-racket--binding-forms)
+ (binding-forms* geiser-racket--binding-forms*))
+
+(geiser-impl--add-to-alist 'regexp
+ "\\.\\(mzscheme\\|racket\\)\\.sl?s$" 'racket t)
+(geiser-impl--add-to-alist 'regexp "\\.ss$" 'racket t)
+(geiser-impl--add-to-alist 'regexp "\\.rkt$" 'racket t)
+
+
+(provide 'geiser-racket)
+;;; geiser-racket.el ends here