/local-lisp/slime/slime.el

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;;; slime.el --- Superior Lisp Interaction Mode for Emacs
;;
;;;; License
;;     Copyright (C) 2003  Eric Marsden, Luke Gorrie, Helmut Eller
;;     Copyright (C) 2004,2005,2006  Luke Gorrie, Helmut Eller
;;     Copyright (C) 2007,2008,2009  Helmut Eller, Tobias C. Rittweiler
;;
;;     For a detailed list of contributors, see the manual.
;;
;;     This program 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 2 of
;;     the License, or (at your option) any later version.
;;
;;     This program 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, write to the Free
;;     Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
;;     MA 02111-1307, USA.


;;;; Commentary
;;
;; This file contains extensions for programming in Common Lisp. The
;; main features are:
;;
;;   A socket-based communication/RPC interface between Emacs and
;;   Lisp, enabling introspection and remote development.
;;
;;   The `slime-mode' minor-mode complementing `lisp-mode'. This new
;;   mode includes many commands for interacting with the Common Lisp
;;   process.
;;
;;   A Common Lisp debugger written in Emacs Lisp. The debugger pops up
;;   an Emacs buffer similar to the Emacs/Elisp debugger.
;;
;;   A Common Lisp inspector to interactively look at run-time data.
;;
;;   Trapping compiler messages and creating annotations in the source
;;   file on the appropriate forms.
;;
;; SLIME should work with Emacs 22 and 23.  If it works on XEmacs,
;; consider yourself lucky.
;;
;; In order to run SLIME, a supporting Lisp server called Swank is
;; required. Swank is distributed with slime.el and will automatically
;; be started in a normal installation.


;;;; Dependencies and setup

(eval-and-compile
  (when (<= emacs-major-version 20)
    (error "Slime requires an Emacs version of 21, or above")))

(eval-and-compile
  (require 'cl)
  (when (locate-library "hyperspec")
    (require 'hyperspec)))
(require 'thingatpt)
(require 'comint)
(require 'timer)
(require 'pp)
(require 'hideshow)
(require 'font-lock)
(when (featurep 'xemacs)
  (require 'overlay))
(require 'easymenu)
(eval-when (compile)
  (require 'arc-mode)
  (require 'apropos)
  (require 'outline)
  (require 'etags)
  (require 'compile)
  (require 'gud))

(eval-and-compile 
  (defvar slime-path
    (let ((path (or (locate-library "slime") load-file-name)))
      (and path (file-name-directory path)))
    "Directory containing the Slime package.
This is used to load the supporting Common Lisp library, Swank.
The default value is automatically computed from the location of the
Emacs Lisp package."))

(defvar slime-lisp-modes '(lisp-mode))
(defvar slime-setup-contribs nil)

(defun slime-setup (&optional contribs)
  "Setup Emacs so that lisp-mode buffers always use SLIME.
CONTRIBS is a list of contrib packages to load."
  (when (member 'lisp-mode slime-lisp-modes)
    (add-hook 'lisp-mode-hook 'slime-lisp-mode-hook))
  (setq slime-setup-contribs contribs)
  (slime-setup-contribs))

(defun slime-setup-contribs ()
  "Load and initialize contribs."
  (when slime-setup-contribs
    (add-to-list 'load-path (expand-file-name "contrib" slime-path))
    (dolist (c slime-setup-contribs)
      (require c)
      (let ((init (intern (format "%s-init" c))))
        (when (fboundp init)
          (funcall init))))))

(defun slime-lisp-mode-hook ()
  (slime-mode 1)
  (set (make-local-variable 'lisp-indent-function)
       'common-lisp-indent-function))

(eval-and-compile
  (defun slime-changelog-date (&optional interactivep)
    "Return the datestring of the latest entry in the ChangeLog file.
Return nil if the ChangeLog file cannot be found."
    (interactive "p")
    (let ((changelog (concat slime-path "ChangeLog"))
          (date nil))
      (when (file-exists-p changelog)
        (with-temp-buffer 
          (insert-file-contents-literally changelog nil 0 100)
          (goto-char (point-min))
          (setq date (symbol-name (read (current-buffer))))))
      (when interactivep
        (message "Slime ChangeLog dates %s." date))
      date)))

(defvar slime-protocol-version nil)
(setq slime-protocol-version
      (eval-when-compile (slime-changelog-date)))


;;;; Customize groups
;;
;;;;; slime

(defgroup slime nil
  "Interaction with the Superior Lisp Environment."
  :prefix "slime-"
  :group 'applications)

;;;;; slime-ui

(defgroup slime-ui nil
  "Interaction with the Superior Lisp Environment."
  :prefix "slime-"
  :group 'slime)

(defcustom slime-truncate-lines t
  "Set `truncate-lines' in popup buffers.
This applies to buffers that present lines as rows of data, such as
debugger backtraces and apropos listings."
  :type 'boolean
  :group 'slime-ui)

(defcustom slime-kill-without-query-p nil
  "If non-nil, kill SLIME processes without query when quitting Emacs.
This applies to the *inferior-lisp* buffer and the network connections."
  :type 'boolean
  :group 'slime-ui)

;;;;; slime-lisp

(defgroup slime-lisp nil
  "Lisp server configuration."
  :prefix "slime-"
  :group 'slime)

(defcustom slime-backend "swank-loader.lisp"
  "The name of the Lisp file that loads the Swank server.
This name is interpreted relative to the directory containing
slime.el, but could also be set to an absolute filename."
  :type 'string
  :group 'slime-lisp)

(defcustom slime-connected-hook nil
  "List of functions to call when SLIME connects to Lisp."
  :type 'hook
  :group 'slime-lisp)

(defcustom slime-enable-evaluate-in-emacs nil
  "*If non-nil, the inferior Lisp can evaluate arbitrary forms in Emacs.
The default is nil, as this feature can be a security risk."
  :type '(boolean)
  :group 'slime-lisp)

(defcustom slime-lisp-host "127.0.0.1"
  "The default hostname (or IP address) to connect to."
  :type 'string
  :group 'slime-lisp)

(defcustom slime-port 4005
  "Port to use as the default for `slime-connect'."
  :type 'integer
  :group 'slime-lisp)

(defvar slime-net-valid-coding-systems
  '((iso-latin-1-unix nil "iso-latin-1-unix")
    (iso-8859-1-unix  nil "iso-latin-1-unix")
    (binary           nil "iso-latin-1-unix")
    (utf-8-unix       t   "utf-8-unix")
    (emacs-mule-unix  t   "emacs-mule-unix")
    (euc-jp-unix      t   "euc-jp-unix"))
  "A list of valid coding systems. 
Each element is of the form: (NAME MULTIBYTEP CL-NAME)")

(defun slime-find-coding-system (name)
  "Return the coding system for the symbol NAME.
The result is either an element in `slime-net-valid-coding-systems'
of nil."
  (let ((probe (assq name slime-net-valid-coding-systems)))
    (when (and probe (if (fboundp 'check-coding-system)
                         (ignore-errors (check-coding-system (car probe)))
                         (eq (car probe) 'binary)))
      probe)))

(defcustom slime-net-coding-system
  (car (find-if 'slime-find-coding-system
                slime-net-valid-coding-systems :key 'car))
  "Coding system used for network connections.
See also `slime-net-valid-coding-systems'."
  :type (cons 'choice
              (mapcar (lambda (x)
                        (list 'const (car x)))
                      slime-net-valid-coding-systems))
  :group 'slime-lisp)

;;;;; slime-mode

(defgroup slime-mode nil
  "Settings for slime-mode Lisp source buffers."
  :prefix "slime-"
  :group 'slime)

(defcustom slime-find-definitions-function 'slime-find-definitions-rpc
  "Function to find definitions for a name.
The function is called with the definition name, a string, as its
argument."
  :type 'function
  :group 'slime-mode
  :options '(slime-find-definitions-rpc
             slime-etags-definitions
             (lambda (name)
               (append (slime-find-definitions-rpc name)
                       (slime-etags-definitions name)))
             (lambda (name)
               (or (slime-find-definitions-rpc name)
                   (and tags-table-list
                        (slime-etags-definitions name))))))

(defcustom slime-complete-symbol-function 'slime-simple-complete-symbol
  "*Function to perform symbol completion."
  :group 'slime-mode
  :type '(choice (const :tag "Simple" slime-simple-complete-symbol)
                 (const :tag "Compound" slime-complete-symbol*)
                 (const :tag "Fuzzy" slime-fuzzy-complete-symbol)))

;;;;; slime-mode-faces

(defgroup slime-mode-faces nil
  "Faces in slime-mode source code buffers."
  :prefix "slime-"
  :group 'slime-mode)

(defun slime-underline-color (color)
  "Return a legal value for the :underline face attribute based on COLOR."
  ;; In XEmacs the :underline attribute can only be a boolean.
  ;; In GNU it can be the name of a colour.
  (if (featurep 'xemacs)
      (if color t nil)
    color))

(defface slime-error-face
  `((((class color) (background light))
     (:underline ,(slime-underline-color "red")))
    (((class color) (background dark))
     (:underline ,(slime-underline-color "red")))
    (t (:underline t)))
  "Face for errors from the compiler."
  :group 'slime-mode-faces)

(defface slime-warning-face
  `((((class color) (background light))
     (:underline ,(slime-underline-color "orange")))
    (((class color) (background dark))
     (:underline ,(slime-underline-color "coral")))
    (t (:underline t)))
  "Face for warnings from the compiler."
  :group 'slime-mode-faces)

(defface slime-style-warning-face
  `((((class color) (background light))
     (:underline ,(slime-underline-color "brown")))
    (((class color) (background dark))
     (:underline ,(slime-underline-color "gold")))
    (t (:underline t)))
  "Face for style-warnings from the compiler."
  :group 'slime-mode-faces)

(defface slime-note-face
  `((((class color) (background light))
     (:underline ,(slime-underline-color "brown4")))
    (((class color) (background dark))
     (:underline ,(slime-underline-color "light goldenrod")))
    (t (:underline t)))
  "Face for notes from the compiler."
  :group 'slime-mode-faces)

(defun slime-face-inheritance-possible-p ()
  "Return true if the :inherit face attribute is supported." 
  (assq :inherit custom-face-attributes))

(defface slime-highlight-face
  (if (slime-face-inheritance-possible-p)
      '((t (:inherit highlight :underline nil)))
    '((((class color) (background light))
       (:background "darkseagreen2"))
      (((class color) (background dark))
       (:background "darkolivegreen"))
      (t (:inverse-video t))))
  "Face for compiler notes while selected."
  :group 'slime-mode-faces)

;;;;; sldb

(defgroup slime-debugger nil
  "Backtrace options and fontification."
  :prefix "sldb-"
  :group 'slime)

(defmacro define-sldb-faces (&rest faces)
  "Define the set of SLDB faces.
Each face specifiation is (NAME DESCRIPTION &optional PROPERTIES).
NAME is a symbol; the face will be called sldb-NAME-face.
DESCRIPTION is a one-liner for the customization buffer.
PROPERTIES specifies any default face properties."
  `(progn ,@(loop for face in faces
                  collect `(define-sldb-face ,@face))))

(defmacro define-sldb-face (name description &optional default)
  (let ((facename (intern (format "sldb-%s-face" (symbol-name name)))))
    `(defface ,facename
       (list (list t ,default))
      ,(format "Face for %s." description)
      :group 'slime-debugger)))

(define-sldb-faces
  (topline        "the top line describing the error")
  (condition      "the condition class")
  (section        "the labels of major sections in the debugger buffer")
  (frame-label    "backtrace frame numbers")
  (restart-type   "restart names."
                  (if (slime-face-inheritance-possible-p)
                      '(:inherit font-lock-keyword-face)))
  (restart        "restart descriptions")
  (restart-number "restart numbers (correspond to keystrokes to invoke)"
                  '(:bold t))
  (frame-line     "function names and arguments in the backtrace")
  (restartable-frame-line
   "frames which are surely restartable"
   '(:foreground "lime green"))
  (non-restartable-frame-line
   "frames which are surely not restartable")
  (detailed-frame-line
   "function names and arguments in a detailed (expanded) frame")
  (local-name     "local variable names")
  (local-value    "local variable values")
  (catch-tag      "catch tags"))


;;;; Minor modes

;;;;; slime-mode

(defvar slime-mode-indirect-map (make-sparse-keymap)
  "Empty keymap which has `slime-mode-map' as it's parent.
This is a hack so that we can reinitilize the real slime-mode-map
more easily. See `slime-init-keymaps'.")

(define-minor-mode slime-mode
  "\\<slime-mode-map>\
SLIME: The Superior Lisp Interaction Mode for Emacs (minor-mode).

Commands to compile the current buffer's source file and visually
highlight any resulting compiler notes and warnings:
\\[slime-compile-and-load-file]	- Compile and load the current buffer's file.
\\[slime-compile-file]	- Compile (but not load) the current buffer's file.
\\[slime-compile-defun]	- Compile the top-level form at point.

Commands for visiting compiler notes:
\\[slime-next-note]	- Goto the next form with a compiler note.
\\[slime-previous-note]	- Goto the previous form with a compiler note.
\\[slime-remove-notes]	- Remove compiler-note annotations in buffer.

Finding definitions:
\\[slime-edit-definition]	- Edit the definition of the function called at point.
\\[slime-pop-find-definition-stack]	- Pop the definition stack to go back from a definition.

Documentation commands:
\\[slime-describe-symbol]	- Describe symbol.
\\[slime-apropos]	- Apropos search.
\\[slime-disassemble-symbol]	- Disassemble a function.

Evaluation commands:
\\[slime-eval-defun]	- Evaluate top-level from containing point.
\\[slime-eval-last-expression]	- Evaluate sexp before point.
\\[slime-pprint-eval-last-expression]	- Evaluate sexp before point, pretty-print result.

Full set of commands:
\\{slime-mode-map}"
  nil
  nil
  slime-mode-indirect-map
  (slime-setup-command-hooks)
  (setq slime-modeline-string (slime-modeline-string)))



;;;;;; Modeline

;; For XEmacs only
(make-variable-buffer-local
 (defvar slime-modeline-string nil
   "The string that should be displayed in the modeline."))

(add-to-list 'minor-mode-alist
             `(slime-mode ,(if (featurep 'xemacs)
                               'slime-modeline-string
                             '(:eval (slime-modeline-string)))))

(defun slime-modeline-string ()
  "Return the string to display in the modeline.
\"Slime\" only appears if we aren't connected.  If connected,
include package-name, connection-name, and possibly some state
information."
  (let ((conn (slime-current-connection)))
    ;; Bail out early in case there's no connection, so we won't
    ;; implicitly invoke `slime-connection' which may query the user.
    (if (not conn)
        (and slime-mode " Slime")
        (let ((local (eq conn slime-buffer-connection))
              (pkg   (slime-current-package)))
          (concat " "
                  (if local "{" "[")
                  (if pkg (slime-pretty-package-name pkg) "?")
                  " "
                  ;; ignore errors for closed connections
                  (ignore-errors (slime-connection-name conn))
                  (slime-modeline-state-string conn)
                  (if local "}" "]"))))))

(defun slime-pretty-package-name (name)
  "Return a pretty version of a package name NAME."
  (cond ((string-match "^#?:\\(.*\\)$" name)    
         (match-string 1 name))
        ((string-match "^\"\\(.*\\)\"$" name) 
         (match-string 1 name))
        (t name)))

(defun slime-modeline-state-string (conn)
  "Return a string possibly describing CONN's state."
  (cond ((not (eq (process-status conn) 'open))
         (format " %s" (process-status conn)))
        ((let ((pending (length (slime-rex-continuations conn)))
               (sldbs (length (sldb-buffers conn))))
           (cond ((and (zerop sldbs) (zerop pending)) nil)
                 ((zerop sldbs) (format " %s" pending))
                 (t (format " %s/%s" pending sldbs)))))))

(defmacro slime-recompute-modelines ()
  ;; Avoid a needless runtime funcall on GNU Emacs:
  (and (featurep 'xemacs) `(slime-xemacs-recompute-modelines)))

(defun slime-xemacs-recompute-modelines ()
  (let (redraw-modeline)
    (walk-windows
     (lambda (object)
       (setq object (window-buffer object))
       (when (or (symbol-value-in-buffer 'slime-mode object)
                 (symbol-value-in-buffer 'slime-popup-buffer-mode object))
         ;; Only do the unwind-protect of #'with-current-buffer if we're
         ;; actually interested in this buffer
         (with-current-buffer object
           (setq redraw-modeline
                 (or (not (equal slime-modeline-string
                                 (setq slime-modeline-string
                                       (slime-modeline-string))))
                     redraw-modeline)))))
     'never 'visible)
    (and redraw-modeline (redraw-modeline t))))

(and (featurep 'xemacs)
     (pushnew 'slime-xemacs-recompute-modelines pre-idle-hook))


;;;;; Key bindings

(defvar slime-parent-map nil
  "Parent keymap for shared between all Slime related modes.")

(defvar slime-parent-bindings
  '(("\M-."      slime-edit-definition)
    ("\M-,"      slime-pop-find-definition-stack)
    ("\M-_"      slime-edit-uses)    ; for German layout
    ("\M-?"      slime-edit-uses)    ; for USian layout
    ("\C-x4." 	 slime-edit-definition-other-window)
    ("\C-x5." 	 slime-edit-definition-other-frame)
    ("\C-x\C-e"  slime-eval-last-expression)
    ("\C-\M-x"   slime-eval-defun)
    ;; Include PREFIX keys...
    ("\C-c"	 slime-prefix-map)))

(defvar slime-prefix-map nil
  "Keymap for commands prefixed with `slime-prefix-key'.")

(defvar slime-prefix-bindings
  '(("\C-r"  slime-eval-region)
    (":"     slime-interactive-eval)
    ("\C-e"  slime-interactive-eval)
    ("E"     slime-edit-value)
    ("\C-l"  slime-load-file)
    ("\C-b"  slime-interrupt)
    ("\M-d"  slime-disassemble-symbol)
    ("\C-t"  slime-toggle-trace-fdefinition)
    ("I"     slime-inspect)
    ("\C-xt" slime-list-threads)
    ("\C-xn" slime-cycle-connections)
    ("\C-xc" slime-list-connections)
    ("<"     slime-list-callers)
    (">"     slime-list-callees)
    ;; Include DOC keys...
    ("\C-d"  slime-doc-map)
    ;; Include XREF WHO-FOO keys...
    ("\C-w"  slime-who-map)
    ))

(defvar slime-editing-map nil
  "These keys are useful for buffers where the user can insert and
edit s-exprs, e.g. for source buffers and the REPL.")

(defvar slime-editing-keys
  `(;; Arglist display & completion
    ("\M-\t"      slime-complete-symbol)
    (" "          slime-space)
    ;; Evaluating
    ;;("\C-x\M-e" slime-eval-last-expression-display-output :inferior t)
    ("\C-c\C-p"   slime-pprint-eval-last-expression)
    ;; Macroexpand
    ("\C-c\C-m"   slime-macro/compiler-macro-expand-1)
    ("\C-c\M-m"   slime-macroexpand-all)
    ;; Misc
    ("\C-c\C-u"   slime-undefine-function)
    (,(kbd "C-M-.")   slime-next-location)
    (,(kbd "C-M-,")   slime-previous-location)
    ;; Obsolete, redundant bindings
    ("\C-c\C-i" slime-complete-symbol)
    ;;("\M-*" pop-tag-mark) ; almost to clever
    ))

(defvar slime-mode-map nil
  "Keymap for slime-mode.")

(defvar slime-keys
  '( ;; Compiler notes
    ("\M-p"       slime-previous-note)
    ("\M-n"       slime-next-note)
    ("\C-c\M-c"   slime-remove-notes)
    ("\C-c\C-k"   slime-compile-and-load-file)
    ("\C-c\M-k"   slime-compile-file)
    ("\C-c\C-c"   slime-compile-defun)))

(defun slime-nop ()
  "The null command. Used to shadow currently-unused keybindings."
  (interactive)
  (call-interactively 'undefined))

(defvar slime-doc-map nil
  "Keymap for documentation commands. Bound to a prefix key.")

(defvar slime-doc-bindings
  '((?a slime-apropos)
    (?z slime-apropos-all)
    (?p slime-apropos-package)
    (?d slime-describe-symbol)
    (?f slime-describe-function)
    (?h slime-documentation-lookup)
    (?~ common-lisp-hyperspec-format)
    (?# common-lisp-hyperspec-lookup-reader-macro)))
  
(defvar slime-who-map nil
  "Keymap for who-xref commands. Bound to a prefix key.")

(defvar slime-who-bindings
  '((?c slime-who-calls)
    (?w slime-calls-who)
    (?r slime-who-references)
    (?b slime-who-binds)
    (?s slime-who-sets)
    (?m slime-who-macroexpands)
    (?a slime-who-specializes)))

(defun slime-init-keymaps ()
  "(Re)initialize the keymaps for `slime-mode'."
  (interactive)
  (slime-init-keymap 'slime-doc-map t t slime-doc-bindings)
  (slime-init-keymap 'slime-who-map t t slime-who-bindings)
  (slime-init-keymap 'slime-prefix-map t nil slime-prefix-bindings)
  (slime-init-keymap 'slime-parent-map nil nil slime-parent-bindings)
  (slime-init-keymap 'slime-editing-map nil nil slime-editing-keys)
  (set-keymap-parent slime-editing-map slime-parent-map)
  (slime-init-keymap 'slime-mode-map nil nil slime-keys)
  (set-keymap-parent slime-mode-map slime-editing-map)
  (set-keymap-parent slime-mode-indirect-map slime-mode-map))

(defun slime-init-keymap (keymap-name prefixp bothp bindings)
  (set keymap-name (make-sparse-keymap))
  (when prefixp (define-prefix-command keymap-name))
  (slime-bind-keys (eval keymap-name) bothp bindings))

(defun slime-bind-keys (keymap bothp bindings)
  "Add BINDINGS to KEYMAP.
If BOTHP is true also add bindings with control modifier."
  (loop for (key command) in bindings do
        (cond (bothp
               (define-key keymap `[,key] command)
               (unless (equal key ?h)     ; But don't bind C-h
                 (define-key keymap `[(control ,key)] command)))
              (t (define-key keymap key command)))))

(slime-init-keymaps)

(define-minor-mode slime-editing-mode
  "Minor mode which makes slime-editing-map available.
\\{slime-editing-map}"
  nil
  nil
  slime-editing-map)


;;;; Setup initial `slime-mode' hooks

(make-variable-buffer-local
 (defvar slime-pre-command-actions nil
   "List of functions to execute before the next Emacs command.
This list of flushed between commands."))

(defun slime-pre-command-hook ()
  "Execute all functions in `slime-pre-command-actions', then NIL it."
  (dolist (undo-fn slime-pre-command-actions)
    (funcall undo-fn))
  (setq slime-pre-command-actions nil))

(defun slime-post-command-hook ()
  (when (null pre-command-hook) ; sometimes this is lost
    (add-hook 'pre-command-hook 'slime-pre-command-hook)))

(defun slime-setup-command-hooks ()
  "Setup a buffer-local `pre-command-hook' to call `slime-pre-command-hook'."
  (slime-add-local-hook 'pre-command-hook 'slime-pre-command-hook)
  (slime-add-local-hook 'post-command-hook 'slime-post-command-hook))


;;;; Framework'ey bits
;;;
;;; This section contains some standard SLIME idioms: basic macros,
;;; ways of showing messages to the user, etc. All the code in this
;;; file should use these functions when applicable.
;;;
;;;;; Syntactic sugar

(defmacro* when-let ((var value) &rest body)
  "Evaluate VALUE, if the result is non-nil bind it to VAR and eval BODY.

\(fn (VAR VALUE) &rest BODY)"
  `(let ((,var ,value))
     (when ,var ,@body)))

(put 'when-let 'lisp-indent-function 1)

(defmacro destructure-case (value &rest patterns)
  "Dispatch VALUE to one of PATTERNS.
A cross between `case' and `destructuring-bind'.
The pattern syntax is:
  ((HEAD . ARGS) . BODY)
The list of patterns is searched for a HEAD `eq' to the car of
VALUE. If one is found, the BODY is executed with ARGS bound to the
corresponding values in the CDR of VALUE."
  (let ((operator (gensym "op-"))
	(operands (gensym "rand-"))
	(tmp (gensym "tmp-")))
    `(let* ((,tmp ,value)
	    (,operator (car ,tmp))
	    (,operands (cdr ,tmp)))
       (case ,operator
	 ,@(mapcar (lambda (clause)
                     (if (eq (car clause) t)
                         `(t ,@(cdr clause))
                       (destructuring-bind ((op &rest rands) &rest body) clause
                         `(,op (destructuring-bind ,rands ,operands
                                 . ,body)))))
		   patterns)
	 ,@(if (eq (caar (last patterns)) t)
	       '()
	     `((t (error "Elisp destructure-case failed: %S" ,tmp))))))))

(put 'destructure-case 'lisp-indent-function 1)

(defmacro slime-define-keys (keymap &rest key-command)
  "Define keys in KEYMAP. Each KEY-COMMAND is a list of (KEY COMMAND)."
  `(progn . ,(mapcar (lambda (k-c) `(define-key ,keymap . ,k-c))
		     key-command)))

(put 'slime-define-keys 'lisp-indent-function 1)

(defmacro* with-struct ((conc-name &rest slots) struct &body body)
  "Like with-slots but works only for structs.
\(fn (CONC-NAME &rest SLOTS) STRUCT &body BODY)"
  (flet ((reader (slot) (intern (concat (symbol-name conc-name)
					(symbol-name slot)))))
    (let ((struct-var (gensym "struct")))
      `(let ((,struct-var ,struct))
	 (symbol-macrolet
	     ,(mapcar (lambda (slot)
			(etypecase slot
			  (symbol `(,slot (,(reader slot) ,struct-var)))
			  (cons `(,(first slot) (,(reader (second slot)) 
						 ,struct-var)))))
		      slots)
	   . ,body)))))

(put 'with-struct 'lisp-indent-function 2)

;;;;; Very-commonly-used functions

(defvar slime-message-function 'message)

;; Interface
(defun slime-buffer-name (type &optional hidden)
  (assert (keywordp type))
  (concat (if hidden " " "")
          (format "*slime-%s*" (substring (symbol-name type) 1))))

;; Interface
(defun slime-message (format &rest args)
  "Like `message' but with special support for multi-line messages.
Single-line messages use the echo area."
  (apply slime-message-function format args))

(defun slime-display-warning (message &rest args)
  (display-warning '(slime warning) (apply #'format message args)))

(defvar slime-background-message-function 'slime-display-oneliner)

;; Interface
(defun slime-background-message (format-string &rest format-args)
  "Display a message in passing.
This is like `slime-message', but less distracting because it
will never pop up a buffer or display multi-line messages.
It should be used for \"background\" messages such as argument lists."
  (apply slime-background-message-function format-string format-args))

(defun slime-display-oneliner (format-string &rest format-args)
  (let* ((msg (apply #'format format-string format-args)))
    (unless (minibuffer-window-active-p (minibuffer-window))
      (message  "%s" (slime-oneliner msg)))))

(defun slime-oneliner (string)
  "Return STRING truncated to fit in a single echo-area line."
  (substring string 0 (min (length string)
                           (or (position ?\n string) most-positive-fixnum)
                           (1- (frame-width)))))

;; Interface
(defun slime-set-truncate-lines ()
  "Apply `slime-truncate-lines' to the current buffer."
  (when slime-truncate-lines
    (set (make-local-variable 'truncate-lines) t)))

;; Interface
(defun slime-read-package-name (prompt &optional initial-value)
  "Read a package name from the minibuffer, prompting with PROMPT."
  (let ((completion-ignore-case t))
    (completing-read prompt (slime-bogus-completion-alist 
                             (slime-eval 
                              `(swank:list-all-package-names t)))
		     nil t initial-value)))

;; Interface
(defun slime-read-symbol-name (prompt &optional query)
  "Either read a symbol name or choose the one at point.
The user is prompted if a prefix argument is in effect, if there is no
symbol at point, or if QUERY is non-nil."
  (cond ((or current-prefix-arg query (not (slime-symbol-at-point)))
         (slime-read-from-minibuffer prompt (slime-symbol-at-point)))
        (t (slime-symbol-at-point))))

;; Interface
(defmacro slime-propertize-region (props &rest body)
  "Execute BODY and add PROPS to all the text it inserts.
More precisely, PROPS are added to the region between the point's
positions before and after executing BODY."
  (let ((start (gensym)))
    `(let ((,start (point)))
       (prog1 (progn ,@body)
	 (add-text-properties ,start (point) ,props)))))

(put 'slime-propertize-region 'lisp-indent-function 1)

(defun slime-add-face (face string)
  (add-text-properties 0 (length string) (list 'face face) string)
  string)

(put 'slime-add-face 'lisp-indent-function 1)

;; Interface
(defsubst slime-insert-propertized (props &rest args)
  "Insert all ARGS and then add text-PROPS to the inserted text."
  (slime-propertize-region props (apply #'insert args)))

(defmacro slime-with-rigid-indentation (level &rest body)
  "Execute BODY and then rigidly indent its text insertions.
Assumes all insertions are made at point."
  (let ((start (gensym)) (l (gensym)))
    `(let ((,start (point)) (,l ,(or level '(current-column))))
       (prog1 (progn ,@body)
         (slime-indent-rigidly ,start (point) ,l)))))

(put 'slime-with-rigid-indentation 'lisp-indent-function 1)

(defun slime-indent-rigidly (start end column)
  ;; Similar to `indent-rigidly' but doesn't inherit text props.
  (let ((indent (make-string column ?\ )))
    (save-excursion
      (goto-char end)
      (beginning-of-line)
      (while (and (<= start (point))
                  (progn
                    (insert-before-markers indent)
                    (zerop (forward-line -1))))))))

(defun slime-insert-indented (&rest strings)
  "Insert all arguments rigidly indented."
  (slime-with-rigid-indentation nil
    (apply #'insert strings)))

(defun slime-property-bounds (prop)
  "Return two the positions of the previous and next changes to PROP.
PROP is the name of a text property."
  (assert (get-text-property (point) prop))
  (let ((end (next-single-char-property-change (point) prop)))
    (list (previous-single-char-property-change end prop) end)))

(defun slime-curry (fun &rest args)
  "Partially apply FUN to ARGS.  The result is a new function.
This idiom is preferred over `lexical-let'."
  `(lambda (&rest more) (apply ',fun (append ',args more))))

(defun slime-rcurry (fun &rest args)
  "Like `slime-curry' but ARGS on the right are applied."
  `(lambda (&rest more) (apply ',fun (append more ',args))))


;;;;; Temporary popup buffers

(defvar slime-popup-restore-data nil
  "Data needed when closing popup windows.
This is used as buffer local variable.
The format is (POPUP-WINDOW SELECTED-WINDOW OLD-BUFFER).
POPUP-WINDOW is the window used to display the temp buffer.
That window may have been reused or freshly created.
SELECTED-WINDOW is the window that was selected before displaying
the popup buffer.
OLD-BUFFER is the buffer that was previously displayed in POPUP-WINDOW.
OLD-BUFFER is nil if POPUP-WINDOW was newly created.

See `view-return-to-alist' for a similar idea.")

;; keep compiler quiet
(defvar slime-buffer-package)
(defvar slime-buffer-connection)

;; Interface
(defmacro* slime-with-popup-buffer ((name &key package connection select mode)
                                    &body body)
  "Similar to `with-output-to-temp-buffer'.
Bind standard-output and initialize some buffer-local variables.
Restore window configuration when closed.

NAME is the name of the buffer to be created.
PACKAGE is the value `slime-buffer-package'.
CONNECTION is the value for `slime-buffer-connection'.
MODE is the name of a major mode which will be enabled.
If nil, no explicit connection is associated with
the buffer.  If t, the current connection is taken.
"
  `(let* ((vars% (list ,(if (eq package t) '(slime-current-package) package)
                       ,(if (eq connection t) '(slime-connection) connection)))
          (standard-output (slime-make-popup-buffer ,name vars% ,mode)))
     (with-current-buffer standard-output
       (prog1 (progn ,@body)
         (assert (eq (current-buffer) standard-output))
         (setq buffer-read-only t)
         (set-window-point (slime-display-popup-buffer ,(or select nil))
                           (point))))))

(put 'slime-with-popup-buffer 'lisp-indent-function 1)

(defun slime-make-popup-buffer (name buffer-vars mode)
  "Return a temporary buffer called NAME.
The buffer also uses the minor-mode `slime-popup-buffer-mode'."
  (with-current-buffer (get-buffer-create name)
    (kill-all-local-variables)
    (when mode
      (funcall mode))
    (setq buffer-read-only nil)
    (erase-buffer)
    (set-syntax-table lisp-mode-syntax-table)
    (slime-init-popup-buffer buffer-vars)
    (current-buffer)))

(defun slime-init-popup-buffer (buffer-vars)
  (slime-popup-buffer-mode 1)
  (multiple-value-setq (slime-buffer-package slime-buffer-connection)
    buffer-vars))

(defun slime-display-popup-buffer (select)
  "Display the current buffer.
Save the selected-window in a buffer-local variable, so that we
can restore it later."
  (let ((selected-window (selected-window))
        (old-windows))
    (walk-windows (lambda (w) (push (cons w (window-buffer w)) old-windows))
                  nil t)
    (let ((new-window (display-buffer (current-buffer))))
      (unless slime-popup-restore-data
        (set (make-local-variable 'slime-popup-restore-data)
             (list new-window
                   selected-window
                   (cdr (find new-window old-windows :key #'car)))))
      (when select
        (select-window new-window))
      new-window)))

(defun slime-close-popup-window ()
  (when slime-popup-restore-data
    (destructuring-bind (popup-window selected-window old-buffer)
        slime-popup-restore-data
      (kill-local-variable 'slime-popup-restore-data)
      (bury-buffer)
      (when (eq popup-window (selected-window))
        (cond ((and (not old-buffer) (not (one-window-p)))
               (delete-window popup-window))
              ((and old-buffer (buffer-live-p old-buffer))
               (set-window-buffer popup-window old-buffer))))
      (when (window-live-p selected-window)
        (select-window selected-window)))))

(defmacro slime-save-local-variables (vars &rest body)
  (let ((vals (make-symbol "vals")))
  `(let ((,vals (mapcar (lambda (var)
                          (if (slime-local-variable-p var)
                              (cons var (eval var))))
                        ',vars)))
     (prog1 (progn . ,body)
       (mapc (lambda (var+val)
               (when (consp var+val)
                 (set (make-local-variable (car var+val)) (cdr var+val))))
             ,vals)))))

(put 'slime-save-local-variables 'lisp-indent-function 1)

(define-minor-mode slime-popup-buffer-mode 
  "Mode for displaying read only stuff"
  nil
  nil
  '(("q" . slime-popup-buffer-quit-function)
    ;;("\C-c\C-z" . slime-switch-to-output-buffer)
    ("\M-." . slime-edit-definition)))

(add-to-list 'minor-mode-alist
             `(slime-popup-buffer-mode
               ,(if (featurep 'xemacs)
                    'slime-modeline-string
                    '(:eval (unless slime-mode
                              (slime-modeline-string))))))

(set-keymap-parent slime-popup-buffer-mode-map slime-parent-map)

(make-variable-buffer-local
 (defvar slime-popup-buffer-quit-function 'slime-popup-buffer-quit
   "The function that is used to quit a temporary popup buffer."))

(defun slime-popup-buffer-quit-function (&optional kill-buffer-p)
  "Wrapper to invoke the value of `slime-popup-buffer-quit-function'."
  (interactive)
  (funcall slime-popup-buffer-quit-function kill-buffer-p))

;; Interface
(defun slime-popup-buffer-quit (&optional kill-buffer-p)
  "Get rid of the current (temp) buffer without asking.
Restore the window configuration unless it was changed since we
last activated the buffer."
  (interactive)
  (let ((buffer (current-buffer)))
    (slime-close-popup-window)
    (when kill-buffer-p
      (kill-buffer buffer))))

;;;;; Filename translation
;;;
;;; Filenames passed between Emacs and Lisp should be translated using
;;; these functions. This way users who run Emacs and Lisp on separate
;;; machines have a chance to integrate file operations somehow.

(defvar slime-to-lisp-filename-function #'convert-standard-filename
  "Function to translate Emacs filenames to CL namestrings.")
(defvar slime-from-lisp-filename-function #'identity
  "Function to translate CL namestrings to Emacs filenames.")

(defun slime-to-lisp-filename (filename)
  "Translate the string FILENAME to a Lisp filename."
  (funcall slime-to-lisp-filename-function filename))

(defun slime-from-lisp-filename (filename)
  "Translate the Lisp filename FILENAME to an Emacs filename."
  (funcall slime-from-lisp-filename-function filename))


;;;; Starting SLIME
;;;
;;; This section covers starting an inferior-lisp, compiling and
;;; starting the server, initiating a network connection.

;;;;; Entry points

;; We no longer load inf-lisp, but we use this variable for backward
;; compatibility.
(defvar inferior-lisp-program "lisp" 
  "*Program name for invoking an inferior Lisp with for Inferior Lisp mode.")

(defvar slime-lisp-implementations nil
  "*A list of known Lisp implementations.
The list should have the form: 
  ((NAME (PROGRAM PROGRAM-ARGS...) &key KEYWORD-ARGS) ...)

NAME is a symbol for the implementation.
PROGRAM and PROGRAM-ARGS are strings used to start the Lisp process.
For KEYWORD-ARGS see `slime-start'.

Here's an example: 
 ((cmucl (\"/opt/cmucl/bin/lisp\" \"-quiet\") :init slime-init-command)
  (acl (\"acl7\") :coding-system emacs-mule))")

(defvar slime-default-lisp nil
  "*The name of the default Lisp implementation.
See `slime-lisp-implementations'")

;; dummy definitions for the compiler
(defvar slime-net-processes)
(defvar slime-default-connection)

(defun slime (&optional command coding-system)
  "Start an inferior^_superior Lisp and connect to its Swank server."
  (interactive)
  (let ((inferior-lisp-program (or command inferior-lisp-program))
        (slime-net-coding-system (or coding-system slime-net-coding-system)))
    (slime-start* (cond ((and command (symbolp command))
                         (slime-lisp-options command))
                        (t (slime-read-interactive-args))))))

(defvar slime-inferior-lisp-program-history '()
  "History list of command strings.  Used by `slime'.")
                                                  
(defun slime-read-interactive-args ()
  "Return the list of args which should be passed to `slime-start'.

The rules for selecting the arguments are rather complicated:

- In the most common case, i.e. if there's no prefix-arg in
  effect and if `slime-lisp-implementations' is nil, use
  `inferior-lisp-program' as fallback.

- If the table `slime-lisp-implementations' is non-nil use the
  implementation with name `slime-default-lisp' or if that's nil
  the first entry in the table.

- If the prefix-arg is `-', prompt for one of the registered
  lisps.

- If the prefix-arg is positive, read the command to start the
  process."
  (let ((table slime-lisp-implementations))
    (cond ((not current-prefix-arg) (slime-lisp-options))
          ((eq current-prefix-arg '-)
           (let ((key (completing-read 
                       "Lisp name: " (mapcar (lambda (x) 
                                               (list (symbol-name (car x)))) 
                                             table)
                       nil t)))
             (slime-lookup-lisp-implementation table (intern key))))
          (t
           (destructuring-bind (program &rest program-args)
               (split-string (read-string 
                              "Run lisp: " inferior-lisp-program
                              'slime-inferior-lisp-program-history))
             (let ((coding-system 
                    (if (eq 16 (prefix-numeric-value current-prefix-arg))
                        (read-coding-system "set slime-coding-system: "
                                            slime-net-coding-system)
                      slime-net-coding-system)))
               (list :program program :program-args program-args
                     :coding-system coding-system)))))))

(defun slime-lisp-options (&optional name)
  (let ((table slime-lisp-implementations))
    (assert (or (not name) table))
    (cond (table (slime-lookup-lisp-implementation slime-lisp-implementations 
                                                   (or name slime-default-lisp
                                                       (car (car table)))))
          (t (destructuring-bind (program &rest args)
                 (split-string inferior-lisp-program)
               (list :program program :program-args args))))))

(defun slime-lookup-lisp-implementation (table name)
  (destructuring-bind (name (prog &rest args) &rest keys) (assoc name table)
    (list* :name name :program prog :program-args args keys)))

(defun* slime-start (&key (program inferior-lisp-program) program-args 
                          directory
                          (coding-system slime-net-coding-system)
                          (init 'slime-init-command)
                          name
                          (buffer "*inferior-lisp*")
                          init-function
                          env)
  "Start a Lisp process and connect to it.
This function is intended for programmatic use if `slime' is not
flexible enough.

PROGRAM and PROGRAM-ARGS are the filename and argument strings
  for the subprocess.
INIT is a function that should return a string to load and start
  Swank. The function will be called with the PORT-FILENAME and ENCODING as
  arguments.  INIT defaults to `slime-init-command'. 
CODING-SYSTEM a symbol for the coding system. The default is 
  slime-net-coding-system
ENV environment variables for the subprocess (see `process-environment').
INIT-FUNCTION function to call right after the connection is established.
BUFFER the name of the buffer to use for the subprocess.
NAME a symbol to describe the Lisp implementation
DIRECTORY change to this directory before starting the process.
"
  (let ((args (list :program program :program-args program-args :buffer buffer 
                    :coding-system coding-system :init init :name name
                    :init-function init-function :env env)))
    (slime-check-coding-system coding-system)
    (when (slime-bytecode-stale-p)
      (slime-urge-bytecode-recompile))
    (let ((proc (slime-maybe-start-lisp program program-args env
                                        directory buffer)))
      (slime-inferior-connect proc args)
      (pop-to-buffer (process-buffer proc)))))

(defun slime-start* (options)
  (apply #'slime-start options))

(defun slime-connect (host port &optional coding-system)
  "Connect to a running Swank server. Return the connection."
  (interactive (list (read-from-minibuffer "Host: " slime-lisp-host)
                     (read-from-minibuffer "Port: " (format "%d" slime-port)
                                           nil t)))
  (when (and (interactive-p) slime-net-processes
             (y-or-n-p "Close old connections first? "))
    (slime-disconnect-all))
  (message "Connecting to Swank on port %S.." port)
  (let ((coding-system (or coding-system slime-net-coding-system)))
    (slime-check-coding-system coding-system)
    (message "Connecting to Swank on port %S.." port)
    (let* ((process (slime-net-connect host port coding-system))
           (slime-dispatching-connection process))
      (slime-setup-connection process))))

;; FIXME: seems redundant
(defun slime-start-and-init (options fun)
  (let* ((rest (plist-get options :init-function))
         (init (cond (rest `(lambda () (funcall ',rest) (funcall ',fun)))
                     (t fun))))
    (slime-start* (plist-put (copy-list options) :init-function init))))

;;;;; Start inferior lisp
;;;
;;; Here is the protocol for starting SLIME:
;;;
;;;   0. Emacs recompiles/reloads slime.elc if it exists and is stale.
;;;   1. Emacs starts an inferior Lisp process.
;;;   2. Emacs tells Lisp (via stdio) to load and start Swank.
;;;   3. Lisp recompiles the Swank if needed.
;;;   4. Lisp starts the Swank server and writes its TCP port to a temp file.
;;;   5. Emacs reads the temp file to get the port and then connects.
;;;   6. Emacs prints a message of warm encouragement for the hacking ahead.
;;;
;;; Between steps 2-5 Emacs polls for the creation of the temp file so
;;; that it can make the connection. This polling may continue for a
;;; fair while if Swank needs recompilation.

(defvar slime-connect-retry-timer nil
  "Timer object while waiting for an inferior-lisp to start.")

;;; Recompiling bytecode:

(defun slime-bytecode-stale-p ()
  "Return true if slime.elc is older than slime.el."
  (when-let (libfile (locate-library "slime"))
    (let* ((basename (file-name-sans-extension libfile))
           (sourcefile (concat basename ".el"))
           (bytefile (concat basename ".elc")))
      (and (file-exists-p bytefile)
           (file-newer-than-file-p sourcefile bytefile)))))

(defun slime-recompile-bytecode ()
  "Recompile and reload slime.
Warning: don't use this in XEmacs, it seems to crash it!"
  (interactive)
  (let ((sourcefile (concat (file-name-sans-extension (locate-library "slime"))
                            ".el")))
    (byte-compile-file sourcefile t)))

(defun slime-urge-bytecode-recompile ()
  "Urge the user to recompile slime.elc.
Return true if we have been given permission to continue."
  (cond ((featurep 'xemacs)
         ;; My XEmacs crashes and burns if I recompile/reload an elisp
         ;; file from itself. So they have to do it themself.
         (or (y-or-n-p "slime.elc is older than source.  Continue? ")
             (signal 'quit nil)))
        ((y-or-n-p "slime.elc is older than source.  Recompile first? ")
         (slime-recompile-bytecode))
        (t)))

(defun slime-abort-connection ()
  "Abort connection the current connection attempt."
  (interactive)
  (cond (slime-connect-retry-timer
         (slime-cancel-connect-retry-timer)
         (message "Cancelled connection attempt."))
        (t (error "Not connecting"))))

;;; Starting the inferior Lisp and loading Swank:

(defun slime-maybe-start-lisp (program program-args env directory buffer)
  "Return a new or existing inferior lisp process."
  (cond ((not (comint-check-proc buffer))
         (slime-start-lisp program program-args env directory buffer))
        ((slime-reinitialize-inferior-lisp-p program program-args env buffer)
         (when-let (conn (find (get-buffer-process buffer) slime-net-processes 
                               :key #'slime-inferior-process))
           (slime-net-close conn))
         (get-buffer-process buffer))
        (t (slime-start-lisp program program-args env directory
                             (generate-new-buffer-name buffer)))))

(defun slime-reinitialize-inferior-lisp-p (program program-args env buffer)
  (let ((args (slime-inferior-lisp-args (get-buffer-process buffer))))
    (and (equal (plist-get args :program) program)
         (equal (plist-get args :program-args) program-args)
         (equal (plist-get args :env) env)
         (not (y-or-n-p "Create an additional *inferior-lisp*? ")))))

(defvar slime-inferior-process-start-hook nil
  "Hook called whenever a new process gets started.")

(defun slime-start-lisp (program program-args env directory buffer)
  "Does the same as `inferior-lisp' but less ugly.
Return the created process."
  (with-current-buffer (get-buffer-create buffer)
    (when directory
      (cd (expand-file-name directory)))
    (comint-mode)
    (let ((process-environment (append env process-environment))
          (process-connection-type nil))
      (comint-exec (current-buffer) "inferior-lisp" program nil program-args))
    (lisp-mode-variables t)
    (let ((proc (get-buffer-process (current-buffer))))
      (slime-set-query-on-exit-flag proc)
      (run-hooks 'slime-inferior-process-start-hook)
      proc)))

(defun slime-inferior-connect (process args)
  "Start a Swank server in the inferior Lisp and connect."
  (slime-delete-swank-port-file 'quiet)
  (slime-start-swank-server process args)
  (slime-read-port-and-connect process nil))

(defvar slime-inferior-lisp-args nil
  "A buffer local variable in the inferior proccess.
See `slime-start'.")

(defun slime-start-swank-server (process args)
  "Start a Swank server on the inferior lisp."
  (destructuring-bind (&key coding-system init &allow-other-keys) args
    (with-current-buffer (process-buffer process)
      (make-local-variable 'slime-inferior-lisp-args)
      (setq slime-inferior-lisp-args args)
      (let ((str (funcall init (slime-swank-port-file) coding-system)))
        (goto-char (process-mark process)) 
        (insert-before-markers str)
        (process-send-string process str)))))

(defun slime-inferior-lisp-args (process)
  "Return the initial process arguments.
See `slime-start'."
  (with-current-buffer (process-buffer process)
    slime-inferior-lisp-args))

;; XXX load-server & start-server used to be separated. maybe that was  better.
(defun slime-init-command (port-filename coding-system)
  "Return a string to initialize Lisp."
  (let ((loader (if (file-name-absolute-p slime-backend)
                    slime-backend
                  (concat slime-path slime-backend)))
        (encoding (slime-coding-system-cl-name coding-system)))
    ;; Return a single form to avoid problems with buffered input.
    (format "%S\n\n"
            `(progn
               (load ,(slime-to-lisp-filename (expand-file-name loader)) 
                     :verbose t)
               (funcall (read-from-string "swank-loader:init"))
               (funcall (read-from-string "swank:start-server")
                        ,(slime-to-lisp-filename port-filename)
                        :coding-system ,encoding)))))

(defun slime-swank-port-file ()
  "Filename where the SWANK server writes its TCP port number."
  (concat (file-name-as-directory (slime-temp-directory))
          (format "slime.%S" (ema…

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