From 377d6d19debce5572052727323931f1b8306226b Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Sun, 8 Feb 2009 01:09:07 +0100
Subject: Basic Guile/Emacs connection and evaluation working.

---
 elisp/geiser-repl.el | 113 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)

(limited to 'elisp/geiser-repl.el')

diff --git a/elisp/geiser-repl.el b/elisp/geiser-repl.el
index 3c75cfc..1353019 100644
--- a/elisp/geiser-repl.el
+++ b/elisp/geiser-repl.el
@@ -25,16 +25,129 @@
 
 ;;; Code:
 
+(require 'geiser-eval)
+(require 'geiser-connection)
 (require 'geiser-base)
 (require 'comint)
 
 
 ;;; Customization:
 
+(defgroup geiser-repl nil
+  "Interacting with a Guile process inside Emacs."
+  :group 'geiser)
+
+(defcustom geiser-repl-guile-binary
+  (cond ((eq system-type 'windows-nt) "guile.exe")
+        ((eq system-type 'darwin) "guile")
+        (t "guile"))
+  "Name to use to call the guile executable when starting a REPL."
+  :type 'string
+  :group 'geiser-repl)
+
+(defcustom geiser-repl-use-other-window t
+  "Use a window other than the current buffer's when switching to
+the Geiser REPL buffer."
+  :type 'boolean
+  :group 'geiser-repl)
+
+(defcustom geiser-repl-window-allow-split t
+  "Allow window splitting when switching to the Geiser REPL buffer."
+  :type 'boolean
+  :group 'geiser-repl)
+
+
+;;; Geiser REPL buffer/process:
+
+(defvar geiser-repl--buffer nil
+  "The buffer in which the Guile REPL is running.")
+
+(defun geiser-repl--buffer ()
+  (if (buffer-live-p geiser-repl--buffer) geiser-repl--buffer
+    (with-current-buffer (get-buffer-create "*Geiser REPL*")
+      (geiser-repl-mode)
+      (setq geiser-repl--buffer (current-buffer)))))
+
+(defun geiser-repl--start-process ()
+  (let ((guile geiser-repl-guile-binary))
+    (message "Starting Geiser REPL ...")
+    (pop-to-buffer (geiser-repl--buffer))
+    (make-comint-in-buffer "Geiser REPL"
+                           (current-buffer)
+                           guile
+                           nil
+                           "-L" geiser-scheme-dir "-q")
+    (geiser-repl--wait-for-prompt 10000)
+    (geiser-con--setup-connection (current-buffer))))
+
+(defun geiser-repl--process (&optional start)
+  (or (and (buffer-live-p (geiser-repl--buffer))
+           (get-buffer-process (geiser-repl--buffer)))
+      (if (not start)
+          (error "No running Guile REPL (try M-x run-guile)")
+        (geiser-repl--start-process)
+        (geiser-repl--process))))
+
+(setq geiser-eval--default-proc-function 'geiser-repl--process)
+
+(defun geiser-repl--wait-for-prompt (timeout)
+  (let ((p (point)) (seen))
+    (while (and (not seen) (> timeout 0))
+      (sleep-for 0.1)
+      (setq timeout (- timeout 100))
+      (goto-char p)
+      (setq seen (re-search-forward comint-prompt-regexp nil t)))
+    (goto-char (point-max))
+    (unless seen (error "No prompt found!"))))
+
+
+;;; Interface: starting and interacting with geiser REPL:
+
+(defalias 'switch-to-guile 'run-guile)
+(defalias 'switch-to-geiser-repl 'run-guile)
+
+(defun run-guile (&optional arg)
+  "Show the geiser-repl buffer, starting the process if needed."
+  (interactive)
+  (let ((buf (process-buffer (geiser-repl--process t)))
+        (pop-up-windows geiser-repl-window-allow-split))
+    (if geiser-repl-use-other-window
+        (pop-to-buffer buf)
+      (switch-to-buffer buf))))
+
+(defun geiser-repl-nuke ()
+  "Try this command if the REPL becomes unresponsive."
+  (interactive)
+  (goto-char (point-max))
+  (comint-kill-region comint-last-input-start (point))
+  (comint-redirect-cleanup)
+  (geiser-con--setup-connection geiser-repl--buffer))
+
 
 ;;; geiser-repl mode:
 
+(defun geiser-repl--bol ()
+  (interactive)
+  (when (= (point) (comint-bol)) (beginning-of-line)))
 
+;;;###autoload
+(define-derived-mode geiser-repl-mode comint-mode "Geiser REPL"
+  "Major mode for interacting with an inferior Guile repl process.
+\\{geiser-repl-mode-map}"
+  (set (make-local-variable 'comint-prompt-regexp) geiser-con--prompt-regex)
+  (set (make-local-variable 'comint-use-prompt-regexp) t)
+  (set (make-local-variable 'comint-prompt-read-only) t))
 
+(define-key geiser-repl-mode-map "\C-cz" 'run-guile)
+(define-key geiser-repl-mode-map "\C-c\C-z" 'run-guile)
+(define-key geiser-repl-mode-map "\C-a" 'geiser-repl--bol)
+;; (define-key geiser-repl-mode-map "\C-ca" 'geiser-autodoc-mode)
+;; (define-key geiser-repl-mode-map "\C-ch" 'geiser-help)
+;; (define-key geiser-repl-mode-map "\C-cp" 'geiser-apropos)
+;; (define-key geiser-repl-mode-map "\M-." 'geiser-edit-word-at-point)
+;; (define-key geiser-repl-mode-map "\C-ck" 'geiser-compile-file)
+;; (define-key geiser-repl-mode-map (kbd "TAB") 'geiser-completion--complete-symbol)
+
+
 (provide 'geiser-repl)
 ;;; geiser-repl.el ends here
-- 
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