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|
;;;;; -*-coding: iso-8859-1;-*-
;;;;;
;;;;; Copyright (C) 1991-2002 Lysator Academic Computer Association.
;;;;;
;;;;; This file is part of the LysKOM Emacs LISP client.
;;;;;
;;;;; LysKOM 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, or (at your option)
;;;;; any later version.
;;;;;
;;;;; LysKOM 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 LysKOM; see the file COPYING. If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se.
;;;;;
;;;; ================================================================
;;;; ================================================================
;;;;
;;;; File: command.el
;;;;
;;;; This file contains stuff regarding commands.
;;;;
;;; ======================================================================
;;; LysKOM user commands
;;; The new, blocking commands have a very similar structure
;;;
;;; (defun kom-cmd (args)
;;; "Documentation"
;;; (interactive "...")
;;; (lyskom-start-of-command 'kom-cmd)
;;; (unwind-protect
;;; (progn ...)
;;; (lyskom-end-of-command)))
;;;
;;; This can now be written as
;;;
;;; (def-kom-command kom-cmd (args)
;;; "Documentation"
;;; (interactive "...")
;;; ...)
(eval-and-compile
(defun lyskom-fix-interactive-decl (decl command)
(cond ((stringp (car (cdr decl))) decl)
(t `(interactive (let ((lyskom-current-command ',command))
,@(cdr decl)))))))
(defmacro def-kom-command (cmd args doc &rest forms)
"Define a LysKOM command CMD with args ARGS and docstring DOC.
This is like a defun for LysKOM commands. After the docstring you may
have a series of keywords that alter the behavior of the command,
followed by an interactive declaration (required) and the body of the
command.
The following keywords are recognized:
:dead-ok See the DEAD-OK paramter to lyskom-start-of-command
:may-interrupt See the MAY-INTERRUPT parameter to lyskom-start-of-command
:prompt-format See the PROMPT-FORMAT parameter to lyskom-start-of-command
Note that :prompt-format requires an argument."
(let (interactive-decl may-interrupt dead-ok prompt-format)
(while (memq (car forms) '(:prompt-format :dead-ok :may-interrupt))
(cond ((eq (car forms) :prompt-format)
(setq prompt-format (car (cdr forms)))
(setq forms (cdr forms)))
((eq (car forms) :dead-ok)
(setq dead-ok t))
((eq (car forms) :may-interrupt)
(setq may-interrupt t)))
(setq forms (cdr forms)))
(when (and (listp (car forms))
(eq 'interactive (car (car forms))))
(setq interactive-decl (car forms) forms (cdr forms)))
(if (not (stringp doc))
(progn (message "!! No docstring for command %S" cmd)
(setq forms (cons interactive-decl forms))
(setq interactive-decl doc)
(setq doc "")))
(if (not (eq (car interactive-decl) 'interactive))
(progn (message "!! Missing interactive declaration for %S; assuming \(interactive\)" cmd)
(setq forms (cons interactive-decl forms))
(setq interactive-decl '(interactive))))
(let ((bufsym (make-symbol (format "%S-start-buffer" cmd)))
(winsym (make-symbol (format "%S-start-window" cmd))))
`(defun ,cmd ,args
,doc
,(lyskom-fix-interactive-decl interactive-decl cmd)
(let ((lyskom-command-point (point)))
(lyskom-start-of-command ',cmd ,may-interrupt ,dead-ok ,prompt-format)
(let ((,bufsym (current-buffer))
(,winsym (selected-window)))
(unwind-protect
(condition-case nil
(progn ,@forms)
(quit (ding)
(lyskom-insert-before-prompt
(lyskom-get-string 'interrupted))))
(lyskom-save-excursion
(cond ((and (buffer-live-p ,bufsym)
(window-live-p ,winsym)
(eq (window-buffer ,winsym) ,bufsym))
(save-selected-window
(set-buffer ,bufsym)
(select-window ,winsym)
(lyskom-end-of-command)))
((buffer-live-p ,bufsym)
(set-buffer ,bufsym)
(lyskom-end-of-command))
(t (lyskom-end-of-command)))))))))))
;;
;; def-kom-emacs-command works like def-kom-command, but the template
;; is different. Commands defined this way will run as regular Emacs
;; commands when invoked outside of a LysKOM buffer.
;;
;; The variable <cmd>-running-as-kom-command is non-nil when running
;; as a LysKOM command and nil otherwise.
;;
;; Note: this function catches *all* errors in lyskom-start-of-command
;; which may not be what you want, so be careful.
;;
;;
;; (defun kom-cmd (args)
;; "Documentation"
;; (interactive "...")
;; (let ((kom-cmd-running-as-kom-command nil))
;; (condition-case nil
;; (progn (lyskom-start-of-command 'kom-cmd)
;; (setq kom-cmd-running-as-kom-command t))
;; (error nil))
;; (unwind-protect
;; (condition-case nil
;; (progn ...)
;; (quit (ding)
;; (lyskom-insert-before-prompt
;; (lyskom-get-string 'interrupted))))
;; (and kom-cmd-running-as-kom-command (lyskom-end-of-command)))))
;;
(defmacro def-kom-emacs-command (cmd args doc &rest forms)
(let (interactive-decl may-interrupt dead-ok prompt-format)
(while (memq (car forms) '(:prompt-format :dead-ok :may-interrupt))
(cond ((eq (car forms) :prompt-format)
(setq prompt-format (car (cdr forms)))
(setq forms (cdr forms)))
((eq (car forms) :dead-ok)
(setq dead-ok t))
((eq (car forms) :may-interrupt)
(setq may-interrupt t)))
(setq forms (cdr forms)))
(when (and (listp (car forms))
(eq 'interactive (car (car forms))))
(setq interactive-decl (car forms) forms (cdr forms)))
(if (not (stringp doc))
(progn (message "!! No docstring for command %S" cmd)
(setq forms (cons interactive-decl forms))
(setq interactive-decl doc)
(setq doc "")))
(if (not (eq (car interactive-decl) 'interactive))
(progn (message "!! Missing interactive declaration for %S; assuming \(interactive\)" cmd)
(setq forms (cons interactive-decl forms))
(setq interactive-decl '(interactive))))
(let ((rsym (intern (format "%S-running-as-kom-command" cmd)))
(bufsym (make-symbol (format "%S-start-buffer" cmd)))
(winsym (make-symbol (format "%S-start-window" cmd))))
`(defun ,cmd ,args
,doc
,(lyskom-fix-interactive-decl interactive-decl cmd)
(let ((,rsym nil))
(condition-case nil
(progn (lyskom-start-of-command ',cmd ,may-interrupt ,dead-ok ,prompt-format)
(setq ,rsym t))
(error nil))
(let ((,bufsym (current-buffer))
(,winsym (selected-window)))
(unwind-protect
(condition-case nil
(progn ,@forms)
(quit (ding)
(lyskom-insert-before-prompt
(lyskom-get-string 'interrupted))))
(and ,rsym
(lyskom-save-excursion
(cond ((and (buffer-live-p ,bufsym)
(window-live-p ,winsym)
(eq (window-buffer ,winsym) ,bufsym))
(save-selected-window
(set-buffer ,bufsym)
(select-window ,winsym)
(lyskom-end-of-command)))
((buffer-live-p ,bufsym)
(set-buffer ,bufsym)
(lyskom-end-of-command))
(t (lyskom-end-of-command))))))))))))
(put 'def-kom-command 'edebug-form-spec
'(&define name lambda-list
[&optional stringp] ; Match the doc string, if present.
("interactive" interactive)
def-body))
(put 'def-kom-emacs-command 'edebug-form-spec
'(&define name lambda-list
[&optional stringp] ; Match the doc string, if present.
("interactive" interactive)
def-body))
;;;; ================================================================
;;;; User-level commands and functions.
(defsubst lyskom-command-name (command &optional language)
"Get the command name for the command COMMAND"
(condition-case nil
(lyskom-get-string command 'lyskom-command language)
(error nil)))
(defun lyskom-ok-command (alternative administrator)
"Returns non-nil if it is ok to do such a command right now."
(when (vectorp alternative)
(setq alternative (cons (elt alternative 0) (elt alternative 1))))
(if administrator
(not (memq (cdr alternative) lyskom-admin-removed-commands))
(not (memq (cdr alternative) lyskom-noadmin-removed-commands))))
(defun kom-extended-command ()
"Read a LysKOM function name and call the function."
(interactive)
(let ((fnc (lyskom-read-extended-command current-prefix-arg)))
(cond
(fnc (call-interactively fnc))
(t (kom-next-command)))) )
(defvar lyskom-command-minibuffer-local-completion-map
(let ((map (copy-keymap minibuffer-local-completion-map)))
(define-key map " " 'lyskom-command-complete-word)
map)
"Keymap used for reading LysKOM names.")
(defvar lyskom-command-minibuffer-local-must-match-map
(let ((map (copy-keymap minibuffer-local-must-match-map)))
(lyskom-xemacs-or-gnu
(progn (lyskom-set-keymap-parent map lyskom-minibuffer-local-completion-map)
(define-key map " " 'lyskom-command-complete-word))
(define-key map " " 'lyskom-command-complete-word))
map)
"Keymap used for reading LysKOM names.")
(defun lyskom-read-extended-command (&optional prefix-arg prompt)
"Reads and returns a command"
(let* ((completion-ignore-case t)
(minibuffer-setup-hook minibuffer-setup-hook)
(base-prompt (cond ((null prompt) (lyskom-get-string 'extended-command))
((symbolp prompt) (lyskom-get-string prompt))
(t prompt)))
(alternatives (mapcar
(lambda (pair)
(cons
(cdr pair)
(car pair)))
(lyskom-get-strings lyskom-commands
'lyskom-command)))
(name nil)
(prefix-text
(cond ((eq prefix-arg '-) "- ")
((equal prefix-arg '(4)) "C-u ")
((integerp prefix-arg)
(format "%d " prefix-arg))
((and (consp prefix-arg)
(integerp (car prefix-arg)))
(format "%d " (car prefix-arg)))
(t nil)))
(prompt (if prefix-text
(concat prefix-text base-prompt)
base-prompt)))
(let ((minibuffer-local-completion-map
lyskom-command-minibuffer-local-completion-map)
(minibuffer-local-must-match-map
lyskom-command-minibuffer-local-must-match-map))
(while (or (null name)
(string= "" name))
(setq name (lyskom-completing-read prompt
'lyskom-complete-command
;; lyskom-is-administrator is buffer-local and
;; must be evalled before the call to
;; completing-read
;; Yes, this is not beautiful
(list 'lambda '(alternative) ;
(list 'lyskom-ok-command 'alternative
lyskom-is-administrator))
t
nil
'lyskom-command-history))))
(cdr (lyskom-string-assoc name alternatives))))
(defun lyskom-update-command-completion ()
"Build a list of alternatives for completion of LysKOM commands.
Each list element is a vector [NAME COMMAND CANONICAL]. NAME is the
command name, COMMAND is the command and CANONICAL is the name
transformed for matching."
(setq lyskom-command-alternatives
(mapcar (lambda (el)
(vector (cdr el)
(car el)
(lyskom-completing-strip-command
(lyskom-unicase (cdr el)))
(lyskom-unicase (cdr el))))
(lyskom-get-strings lyskom-commands 'lyskom-command))))
(defun lyskom-lookup-command-by-name (string &optional predicate)
"Look up the command that corresponds to a certain string."
(lyskom-complete-command string predicate 'lyskom-lookup))
(defsubst lyskom-command-match-string-regexp (string)
(concat
"^\\s-*"
(replace-in-string (regexp-quote
(lyskom-unicase
(lyskom-completing-strip-command string)))
"\\s-+" "\\\\S-*\\\\s-+")
"\\s-*"))
(defun lyskom-completing-strip-command (string)
"Strip parens and crap from a name.
If optional DONT-STRIP-SPACES is non-nil, don't strip spaces at front
and back of the string."
(while (string-match "([^()]*)" string) ; Strip nested parens
(setq string (replace-match "" t t string)))
(while (string-match "\\s-\\s-+" string) ; Collapse spaces
(setq string (replace-match " " t t string)))
(while (string-match "([^()]*$" string) ; Strip incomplete parens at end
(setq string (substring string 0 (match-beginning 0))))
string)
;;; FIXME: Below is an idea on how to do command completion more right.
;;;
;;; Precompute lists of words in all commands. Include the optional words
;;; and mark them as optional. Possibly allow sublists in the list, and
;;; make lists of words into sublists and mark the entire sublist as
;;; optional.
;;;
;;; When matching, divide the input into a list of words. Start matchin
;;; prefixes against the list of words for a command. It goes something
;;; like this:
;;;
;;; C = 0, I = 0
;;; while there are more words in the input and command
;;; A = word I of the input
;;; B = word C of the command
;;; if B is an optional word then
;;; N = index of word following optional group that B is part of
;;; push N,I onto backtracking stack
;;; if A is a prefix of B then
;;; I = I + 1
;;; C = C + 1
;;; next iteration of the loop
;;; if the backtracking stack is empty then
;;; return mismatch
;;; pop X,Y from the backtracking stack
;;; C = X
;;; I = Y
;;; next iteration of the loop
;;; end while
;;; if there are left-over words in C then
;;; return a mismatch
;;; else
;;; return a match (I,C)
;;;
;;; When doing a word completion we can let the completion function do the
;;; actual work. It computes the longest possible completion we can have
;;; (i.e. one full word more than what we've got) and hands that over to
;;; lyskom-complete-string. Computing the longest possible completion
;;; goes something like this:
;;;
;;; W = nil
;;; Store I,C for all matches
;;; for all matches M = 1 .. N do
;;; do something useful
;;;
;;; The idea is to get the last word that matches the input by storing
;;; the results of the match computation and then looking at the
;;; following word in all possible completions. If the following word
;;; is a word in an optional group that is the same in all possible
;;; completions, then that plus the first C words of any of the
;;; possible completions is the maximum possible. If the next word is
;;; a word of an optional group that does *not* match in all
;;; possibles, then ignore the optional group and look at the next
;;; word instead.
(defun lyskom-complete-command (string predicate all)
"Completion function for LysKOM commands."
(when (string-match "^\\s-+" string)
(setq string (substring string (match-end 0))))
(let ((alternatives nil)
(m-string (lyskom-command-match-string-regexp string))
(u-string (lyskom-unicase string))
(exact nil))
(lyskom-traverse el lyskom-command-alternatives
(when (and (string-match m-string (elt el 2))
(or (null predicate) (funcall predicate el)))
(setq alternatives (cons (if (eq all 'lyskom-lookup) el (elt el 0)) alternatives))
(if (string-equal u-string (elt el 3)) (setq exact el))))
(cond
((eq all 'lyskom-lookup) (and exact (elt exact 1)))
((eq all 'lambda) exact)
(all alternatives)
((null alternatives) nil)
((and (= (length alternatives) 1) exact) t)
(t (let ((tmp (lyskom-complete-string alternatives)))
(lyskom-maybe-recode-string
(if (string-match (concat (regexp-quote (lyskom-unicase tmp)) "\\s-") u-string)
(concat tmp " ")
tmp)))))))
(defun lyskom-command-complete-word ()
(interactive)
(let ((string (buffer-string)))
(when (next-single-property-change 0 'read-only string)
(setq string
(substring string
(next-single-property-change 0 'read-only string))))
(let ((completion (try-completion string
minibuffer-completion-table
minibuffer-completion-predicate)))
(cond ((null completion) (lyskom-minibuffer-message " [No match]") nil)
((eq completion t) nil)
(t (let* ((tmp string))
(when (and (string-equal (lyskom-unicase completion)
(lyskom-unicase tmp))
(not (string-match "\\s-$" completion)))
(if (stringp (setq tmp (try-completion
(concat tmp " ")
minibuffer-completion-table
minibuffer-completion-predicate)))
(setq completion tmp)))
(if (string-equal (lyskom-unicase completion)
(lyskom-unicase string))
(progn (minibuffer-completion-help) nil)
(delete-region (- (point-max) (length string))
(point-max))
;; Now we have the suggested completion
;; Expand what's in the buffer by one real word.
(let* ((count (lyskom-command-complete-count-words string))
(result (lyskom-command-complete-word-truncate
completion count)))
(when (string= result string)
(setq result (lyskom-command-complete-word-truncate
completion (1+ count))))
(insert result))
t)))))))
(defvar lyskom-command-complete-regexp
"\\(([^\)]*)\\s-+\\)*\\S-+\\(\\s-*([^\)]*)\\)*\\(\\s-+\\|\\'\\)")
(defun lyskom-command-complete-word-truncate (completion count)
"Truncate completion COMPLETION to COUNT words."
(let ((start 0))
(while (and (> count 0)
(string-match lyskom-command-complete-regexp completion start))
(setq start (match-end 0)
count (1- count)))
(substring completion 0 start)))
(defun lyskom-command-complete-count-words (string)
"Count number of real words in command name or completion STRING."
(let ((start 0)
(count 0))
(while (string-match lyskom-command-complete-regexp string start)
(setq start (match-end 0)
count (1+ count)))
count))
;;; The code below is an alternative implementation of
;;; lyskom-command-complete-word that mucks with the
;;; contents of the minibuffer and then calls the regular
;;; minibuffer functions.
;;;
;;;
;;;(defun lyskom-command-complete-word-count-words (string)
;;; (let ((count 0)
;;; (start 0))
;;; (while (string-match lyskom-command-complete-regexp string start)
;;; (setq start (match-end 0)
;;; count (1+ count)))
;;; count))
;;;
;;;(defun lyskom-command-complete-word ()
;;; (interactive)
;;; (let* ((string (buffer-string))
;;; completions)
;;; ;; Strip the prompt in Emacs 21
;;; (when (next-single-property-change 0 'read-only string)
;;; (setq string
;;; (substring string
;;; (next-single-property-change 0 'read-only string))))
;;;
;;; (setq completions (save-excursion
;;; (set-buffer lyskom-buffer)
;;; (lyskom-complete-command string
;;; nil
;;; nil)))
;;; (when (stringp completions)
;;; (let ((original-count (lyskom-command-complete-word-count-words string))
;;; (start 0))
;;; (while (and (> original-count 0)
;;; (string-match lyskom-command-complete-regexp completions start))
;;; (setq start (match-end 0)
;;; original-count (1- original-count)))
;;;
;;; (delete-region (- (point-max) (length string)) (point-max))
;;; (let ((result (substring completions 0 start)))
;;; (string-match "\\s-*\\'" result)
;;; (insert (substring result 0 (match-beginning 0)))))))
;;; (minibuffer-complete-word))
(defun lyskom-start-of-command (function &optional may-interrupt dead-ok prompt-format)
"This function is run at the beginning of every LysKOM command.
It moves the cursor one line down, and +++ later it will tell the server
that the previous text has been read.
Argument FUNCTION is a string the string will be written in the buffer
on start of the command. If it is a symbol it searches for the corresponding
command name in lyskom-commands and writes this in the message buffer.
If optional argument MAY-INTERRUPT is present and non-nil,
don't signal an error if this call is interrupting another command.
If optional DEAD-OK is non-nil, don't signal an error if the session
has been closed.
If optional PROMPT-FORMAT is non-nil, this will be used to format the prompt.
It should be a format string suitable for lyskom-format. Argument one is the
command name (a symbol or string).
Special: if lyskom-is-waiting then we are allowed to break if we set
lyskom-is-waiting nil.
This function checks if lyskom-doing-default-command and
lyskom-first-time-around are bound. The text entered in the buffer is
chosen according to this"
(cond ((or (not (boundp 'lyskom-proc))
(not (boundp 'lyskom-buffer))
(and (null lyskom-proc) (null lyskom-buffer)))
(lyskom-error "%s" (lyskom-get-string 'not-lyskom-buffer)))
((and (not (or dead-ok
(memq function kom-relogin-inhibit-commands)))
(or (not lyskom-proc)
(memq (process-status lyskom-proc) '(closed signal exited nil))))
(if (or (eq t kom-relogin-behaviour)
(and (eq 'ask kom-relogin-behaviour)
(lyskom-j-or-n-p (lyskom-get-string 'resurrect-session))))
(lyskom (if (= 4894 lyskom-server-port) ; Should we do this different?
lyskom-server-name
(concat lyskom-server-name
":"
(int-to-string lyskom-server-port)))
lyskom-pers-no
lyskom-default-password)
(lyskom-error "%s" (lyskom-get-string 'dead-session)))))
(if (and lyskom-is-waiting
(listp lyskom-is-waiting))
(progn
(setq lyskom-is-waiting nil)
(lyskom-end-of-command)))
(setq lyskom-is-waiting nil)
(if (and lyskom-executing-command (not may-interrupt))
(lyskom-error "%s" (lyskom-get-string 'wait-for-prompt)))
(if (not (and (boundp 'lyskom-doing-default-command)
lyskom-doing-default-command))
(cond
(lyskom-first-time-around)
((stringp function) (lyskom-insert function))
((lyskom-command-name function)
(if prompt-format
(lyskom-format-insert prompt-format function)
(lyskom-insert (lyskom-command-name function)))))
(save-excursion
(if lyskom-current-prompt
(let ((inhibit-read-only t))
(goto-char (point-max))
(beginning-of-line)
(delete-region (point) (point-max)))))
(lyskom-insert (lyskom-modify-prompt
(cond ((stringp lyskom-current-prompt)
(apply 'lyskom-format
lyskom-current-prompt
lyskom-current-prompt-args))
((symbolp lyskom-current-prompt)
(apply 'lyskom-format
(lyskom-get-string lyskom-current-prompt)
lyskom-current-prompt-args))
(t (format "%S" lyskom-current-prompt)))
t)))
(setq mode-line-process (lyskom-get-string 'mode-line-working))
(if (lyskom-pos-visible-in-window-p (point-max))
(save-excursion
(goto-char (point-max))
(lyskom-set-last-viewed)))
(setq lyskom-executing-command t)
(setq lyskom-current-command function)
(setq lyskom-current-prompt nil)
(lyskom-insert "\n")
(if (and (eq (window-buffer (selected-window))
(current-buffer)))
(progn
(if (lyskom-pos-visible-in-window-p (1- (point-max)))
(goto-char (point-max)))
(sit-for 0)))
(run-hooks 'lyskom-before-command-hook)
(if kom-page-before-command ;Nice with dumb terminals.
(if (or (not (listp kom-page-before-command))
(memq function kom-page-before-command))
(recenter 1))))
(defun lyskom-end-of-command ()
"Print prompt, maybe scroll, prefetch info."
(lyskom-save-excursion
(message "")
(lyskom-clean-all-buffer-lists)
(while (and lyskom-to-be-printed-before-prompt
(lyskom-queue->first lyskom-to-be-printed-before-prompt))
(if (not (bolp)) (lyskom-insert "\n"))
(lyskom-insert (car (lyskom-queue->first
lyskom-to-be-printed-before-prompt)))
(lyskom-queue-delete-first lyskom-to-be-printed-before-prompt))
(setq lyskom-executing-command nil)
(setq lyskom-current-command nil)
(setq lyskom-current-prompt nil) ; Already set in s-o-c really
(lyskom-scroll)
(setq mode-line-process (lyskom-get-string 'mode-line-waiting))
(if (lyskom-pos-visible-in-window-p (point-max) (selected-window))
(lyskom-set-last-viewed))
(lyskom-prefetch-and-print-prompt)
(run-hooks 'lyskom-after-command-hook)
(when (and (lyskom-have-feature idle-time)
(not lyskom-is-anonymous))
(lyskom-with-lyskom-buffer
(initiate-user-active 'background nil)))
(if kom-inhibit-typeahead
(discard-input))
;; lyskom-pending-commands should probably be a queue or a stack.
(when lyskom-pending-commands
(let ((command (car lyskom-pending-commands)))
(setq lyskom-pending-commands (cdr lyskom-pending-commands))
(if (symbolp command)
(call-interactively command)
(eval command))))
(when lyskom-slow-mode
(buffer-enable-undo))))
(eval-and-compile (provide 'lyskom-command))
;;; command.el ends here
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