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- ;;; viper-util.el --- Utilities used by viper.el
- ;; Copyright (C) 1994, 1995 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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.
-
- ;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- (require 'ring)
-
- ;; Whether it is XEmacs or not
- (defconst vip-xemacs-p (string-match "\\(Lucid\\|XEmacs\\)" emacs-version))
- ;; Whether it is Emacs or not
- (defconst vip-emacs-p (not vip-xemacs-p))
- ;; Tell whether we are running as a window application or on a TTY
- (defsubst vip-device-type ()
- (if vip-emacs-p
- window-system
- (device-type (selected-device))))
- ;; in XEmacs: device-type is tty on tty and stream in batch.
- (defsubst vip-window-display-p ()
- (and (vip-device-type) (not (memq (vip-device-type) '(tty stream)))))
-
-
- ;;; Macros
-
- (defmacro vip-deflocalvar (var default-value &optional documentation)
- (` (progn
- (defvar (, var) (, default-value)
- (, (format "%s\n\(buffer local\)" documentation)))
- (make-variable-buffer-local '(, var))
- )))
-
- (defmacro vip-loop (count body)
- "(vip-loop COUNT BODY) Execute BODY COUNT times."
- (list 'let (list (list 'count count))
- (list 'while '(> count 0)
- body
- '(setq count (1- count))
- )))
-
- (defmacro vip-buffer-live-p (buf)
- (` (and (, buf) (get-buffer (, buf)) (buffer-name (get-buffer (, buf))))))
-
- ;; return buffer-specific macro definition, given a full macro definition
- (defmacro vip-kbd-buf-alist (macro-elt)
- (` (nth 1 (, macro-elt))))
- ;; get a pair: (curr-buffer . macro-definition)
- (defmacro vip-kbd-buf-pair (macro-elt)
- (` (assoc (buffer-name) (vip-kbd-buf-alist (, macro-elt)))))
- ;; get macro definition for current buffer
- (defmacro vip-kbd-buf-definition (macro-elt)
- (` (cdr (vip-kbd-buf-pair (, macro-elt)))))
-
- ;; return mode-specific macro definitions, given a full macro definition
- (defmacro vip-kbd-mode-alist (macro-elt)
- (` (nth 2 (, macro-elt))))
- ;; get a pair: (major-mode . macro-definition)
- (defmacro vip-kbd-mode-pair (macro-elt)
- (` (assoc major-mode (vip-kbd-mode-alist (, macro-elt)))))
- ;; get macro definition for the current major mode
- (defmacro vip-kbd-mode-definition (macro-elt)
- (` (cdr (vip-kbd-mode-pair (, macro-elt)))))
-
- ;; return global macro definition, given a full macro definition
- (defmacro vip-kbd-global-pair (macro-elt)
- (` (nth 3 (, macro-elt))))
- ;; get global macro definition from an elt of macro-alist
- (defmacro vip-kbd-global-definition (macro-elt)
- (` (cdr (vip-kbd-global-pair (, macro-elt)))))
-
- ;; last elt of a sequence
- (defsubst vip-seq-last-elt (seq)
- (elt seq (1- (length seq))))
-
- ;; Check if arg is a valid character for register
- ;; TYPE is a list that can contain `letter', `Letter', and `digit'.
- ;; Letter means lowercase letters, Letter means uppercase letters, and
- ;; digit means digits from 1 to 9.
- ;; If TYPE is nil, then down/uppercase letters and digits are allowed.
- (defun vip-valid-register (reg &optional type)
- (or type (setq type '(letter Letter digit)))
- (or (if (memq 'letter type)
- (and (<= ?a reg) (<= reg ?z)))
- (if (memq 'digit type)
- (and (<= ?1 reg) (<= reg ?9)))
- (if (memq 'Letter type)
- (and (<= ?A reg) (<= reg ?Z)))
- ))
-
- ;; checks if object is a marker, has a buffer, and points to within that buffer
- (defun vip-valid-marker (marker)
- (if (and (markerp marker) (marker-buffer marker))
- (let ((buf (marker-buffer marker))
- (pos (marker-position marker)))
- (save-excursion
- (set-buffer buf)
- (and (<= pos (point-max)) (<= (point-min) pos))))))
-
-
- (defvar vip-minibuffer-overlay-priority 300)
- (defvar vip-replace-overlay-priority 400)
- (defvar vip-search-overlay-priority 500)
-
-
- ;;; XEmacs support
-
- (if vip-xemacs-p
- (progn
- (fset 'vip-read-event (symbol-function 'next-command-event))
- (fset 'vip-make-overlay (symbol-function 'make-extent))
- (fset 'vip-overlay-start (symbol-function 'extent-start-position))
- (fset 'vip-overlay-end (symbol-function 'extent-end-position))
- (fset 'vip-overlay-put (symbol-function 'set-extent-property))
- (fset 'vip-overlay-p (symbol-function 'extentp))
- (fset 'vip-overlay-get (symbol-function 'extent-property))
- (fset 'vip-move-overlay (symbol-function 'set-extent-endpoints))
- (if (vip-window-display-p)
- (fset 'vip-iconify (symbol-function 'iconify-frame)))
- (cond ((vip-window-display-p)
- (fset 'vip-get-face (symbol-function 'get-face))
- (fset 'vip-color-defined-p
- (symbol-function 'valid-color-name-p))
- )))
- (fset 'vip-read-event (symbol-function 'read-event))
- (fset 'vip-make-overlay (symbol-function 'make-overlay))
- (fset 'vip-overlay-start (symbol-function 'overlay-start))
- (fset 'vip-overlay-end (symbol-function 'overlay-end))
- (fset 'vip-overlay-put (symbol-function 'overlay-put))
- (fset 'vip-overlay-p (symbol-function 'overlayp))
- (fset 'vip-overlay-get (symbol-function 'overlay-get))
- (fset 'vip-move-overlay (symbol-function 'move-overlay))
- (if (vip-window-display-p)
- (fset 'vip-iconify (symbol-function 'iconify-or-deiconify-frame)))
- (cond ((vip-window-display-p)
- (fset 'vip-get-face (symbol-function 'internal-get-face))
- (fset 'vip-color-defined-p (symbol-function 'x-color-defined-p))
- )))
-
- (defsubst vip-color-display-p ()
- (if vip-emacs-p
- (x-display-color-p)
- (eq (device-class (selected-device)) 'color)))
-
- ;; OS/2
- (cond ((eq (vip-device-type) 'pm)
- (fset 'vip-color-defined-p
- (function (lambda (color) (assoc color pm-color-alist))))))
-
- ;; needed to smooth out the difference between Emacs and XEmacs
- (defsubst vip-italicize-face (face)
- (if vip-xemacs-p
- (make-face-italic face)
- (make-face-italic face nil 'noerror)))
-
- ;; test if display is color and the colors are defined
- (defsubst vip-can-use-colors (&rest colors)
- (if (vip-color-display-p)
- (not (memq nil (mapcar 'vip-color-defined-p colors)))
- ))
-
- ;; currently doesn't work for XEmacs
- (defun vip-change-cursor-color (new-color)
- (if (and (vip-window-display-p) (vip-color-display-p)
- (stringp new-color) (vip-color-defined-p new-color)
- (not (string= new-color (vip-get-cursor-color))))
- (modify-frame-parameters
- (selected-frame) (list (cons 'cursor-color new-color)))))
-
- (defsubst vip-save-cursor-color ()
- (if (and (vip-window-display-p) (vip-color-display-p))
- (let ((color (vip-get-cursor-color)))
- (if (and (stringp color) (vip-color-defined-p color)
- (not (string= color vip-replace-overlay-cursor-color)))
- (vip-overlay-put vip-replace-overlay 'vip-cursor-color color)))))
-
- (defsubst vip-restore-cursor-color ()
- (vip-change-cursor-color
- (vip-overlay-get vip-replace-overlay 'vip-cursor-color)))
-
- (defsubst vip-get-cursor-color ()
- (cdr (assoc 'cursor-color (frame-parameters))))
-
-
- ;; Check the current version against the major and minor version numbers
- ;; using op: cur-vers op major.minor If emacs-major-version or
- ;; emacs-minor-version are not defined, we assume that the current version
- ;; is hopelessly outdated. We assume that emacs-major-version and
- ;; emacs-minor-version are defined. Otherwise, for Emacs/XEmacs 19, if the
- ;; current minor version is < 10 (xemacs) or < 23 (emacs) the return value
- ;; will be nil (when op is =, >, or >=) and t (when op is <, <=), which may be
- ;; incorrect. However, this gives correct result in our cases, since we are
- ;; testing for sufficiently high Emacs versions.
- (defun vip-check-version (op major minor &optional type-of-emacs)
- (if (and (boundp 'emacs-major-version) (boundp 'emacs-minor-version))
- (and (cond ((eq type-of-emacs 'xemacs) vip-xemacs-p)
- ((eq type-of-emacs 'emacs) vip-emacs-p)
- (t t))
- (cond ((eq op '=) (and (= emacs-minor-version minor)
- (= emacs-major-version major)))
- ((memq op '(> >= < <=))
- (and (or (funcall op emacs-major-version major)
- (= emacs-major-version major))
- (if (= emacs-major-version major)
- (funcall op emacs-minor-version minor)
- t)))
- (t
- (error "%S: Invalid op in vip-check-version" op))))
- (cond ((memq op '(= > >=)) nil)
- ((memq op '(< <=)) t))))
-
- ;;;; warn if it is a wrong version of emacs
- ;;(if (or (vip-check-version '< 19 29 'emacs)
- ;; (vip-check-version '< 19 12 'xemacs))
- ;; (progn
- ;; (with-output-to-temp-buffer " *vip-info*"
- ;; (switch-to-buffer " *vip-info*")
- ;; (insert
- ;; (format "
- ;;
- ;;This version of Viper requires
- ;;
- ;;\t Emacs 19.29 and higher
- ;;\t OR
- ;;\t XEmacs 19.12 and higher
- ;;
- ;;It is unlikely to work under Emacs version %s
- ;;that you are using... " emacs-version))
- ;;
- ;; (if noninteractive
- ;; ()
- ;; (beep 1)
- ;; (beep 1)
- ;; (insert "\n\nType any key to continue... ")
- ;; (vip-read-event)))
- ;; (kill-buffer " *vip-info*")))
-
-
- (defun vip-get-visible-buffer-window (wind)
- (if vip-xemacs-p
- (get-buffer-window wind t)
- (get-buffer-window wind 'visible)))
-
-
- ;; Return line position.
- ;; If pos is 'start then returns position of line start.
- ;; If pos is 'end, returns line end. If pos is 'mid, returns line center.
- ;; Pos = 'indent returns beginning of indentation.
- ;; Otherwise, returns point. Current point is not moved in any case."
- (defun vip-line-pos (pos)
- (let ((cur-pos (point))
- (result))
- (cond
- ((equal pos 'start)
- (beginning-of-line))
- ((equal pos 'end)
- (end-of-line))
- ((equal pos 'mid)
- (goto-char (+ (vip-line-pos 'start) (vip-line-pos 'end) 2)))
- ((equal pos 'indent)
- (back-to-indentation))
- (t nil))
- (setq result (point))
- (goto-char cur-pos)
- result))
-
-
- ;; Like move-marker but creates a virgin marker if arg isn't already a marker.
- ;; The first argument must eval to a variable name.
- ;; Arguments: (var-name position &optional buffer).
- ;;
- ;; This is useful for moving markers that are supposed to be local.
- ;; For this, VAR-NAME should be made buffer-local with nil as a default.
- ;; Then, each time this var is used in `vip-move-marker-locally' in a new
- ;; buffer, a new marker will be created.
- (defun vip-move-marker-locally (var pos &optional buffer)
- (if (markerp (eval var))
- ()
- (set var (make-marker)))
- (move-marker (eval var) pos buffer))
-
-
- ;; Print CONDITIONS as a message.
- (defun vip-message-conditions (conditions)
- (let ((case (car conditions)) (msg (cdr conditions)))
- (if (null msg)
- (message "%s" case)
- (message "%s: %s" case (mapconcat 'prin1-to-string msg " ")))
- (beep 1)))
-
-
-
- ;;; List/alist utilities
-
- ;; Convert LIST to an alist
- (defun vip-list-to-alist (lst)
- (let ((alist))
- (while lst
- (setq alist (cons (list (car lst)) alist))
- (setq lst (cdr lst)))
- alist))
-
- ;; Convert ALIST to a list.
- (defun vip-alist-to-list (alst)
- (let ((lst))
- (while alst
- (setq lst (cons (car (car alst)) lst))
- (setq alst (cdr alst)))
- lst))
-
- ;; Filter ALIST using REGEXP. Return alist whose elements match the regexp.
- (defun vip-filter-alist (regexp alst)
- (interactive "s x")
- (let ((outalst) (inalst alst))
- (while (car inalst)
- (if (string-match regexp (car (car inalst)))
- (setq outalst (cons (car inalst) outalst)))
- (setq inalst (cdr inalst)))
- outalst))
-
- ;; Filter LIST using REGEXP. Return list whose elements match the regexp.
- (defun vip-filter-list (regexp lst)
- (interactive "s x")
- (let ((outlst) (inlst lst))
- (while (car inlst)
- (if (string-match regexp (car inlst))
- (setq outlst (cons (car inlst) outlst)))
- (setq inlst (cdr inlst)))
- outlst))
-
-
- ;; Append LIS2 to LIS1, both alists, by side-effect and returns LIS1
- ;; LIS2 is modified by filtering it: deleting its members of the form
- ;; \(car elt\) such that (car elt') is in LIS1.
- (defun vip-append-filter-alist (lis1 lis2)
- (let ((temp lis1)
- elt)
-
- ;;filter-append the second list
- (while temp
- ;; delete all occurrences
- (while (setq elt (assoc (car (car temp)) lis2))
- (setq lis2 (delq elt lis2)))
- (setq temp (cdr temp)))
-
- (nconc lis1 lis2)))
-
-
-
-
- ;;; Insertion ring
-
- ;; Rotate RING's index. DIRection can be positive or negative.
- (defun vip-ring-rotate1 (ring dir)
- (if (and (ring-p ring) (> (ring-length ring) 0))
- (progn
- (setcar ring (cond ((> dir 0)
- (ring-plus1 (car ring) (ring-length ring)))
- ((< dir 0)
- (ring-minus1 (car ring) (ring-length ring)))
- ;; don't rotate if dir = 0
- (t (car ring))))
- (vip-current-ring-item ring)
- )))
-
- (defun vip-special-ring-rotate1 (ring dir)
- (if (memq vip-intermediate-command
- '(repeating-display-destructive-command
- repeating-insertion-from-ring))
- (vip-ring-rotate1 ring dir)
- ;; don't rotate otherwise
- (vip-ring-rotate1 ring 0)))
-
- ;; current ring item; if N is given, then so many items back from the
- ;; current
- (defun vip-current-ring-item (ring &optional n)
- (setq n (or n 0))
- (if (and (ring-p ring) (> (ring-length ring) 0))
- (aref (cdr (cdr ring)) (mod (- (car ring) 1 n) (ring-length ring)))))
-
- ;; push item onto ring. the second argument is a ring-variable, not value.
- (defun vip-push-onto-ring (item ring-var)
- (or (ring-p (eval ring-var))
- (set ring-var (make-ring (eval (intern (format "%S-size" ring-var))))))
- (or (null item) ; don't push nil
- (and (stringp item) (string= item "")) ; or empty strings
- (equal item (vip-current-ring-item (eval ring-var))) ; or old stuff
- ;; Since vip-set-destructive-command checks if we are inside vip-repeat,
- ;; we don't check whether this-command-keys is a `.'.
- ;; The cmd vip-repeat makes a call to the current function only if
- ;; `.' is executing a command from the command history. It doesn't
- ;; call the push-onto-ring function if `.' is simply repeating the
- ;; last destructive command.
- ;; We only check for ESC (which happens when we do insert with a
- ;; prefix argument, or if this-command-keys doesn't give anything
- ;; meaningful (in that case we don't know what to show to the user).
- (and (eq ring-var 'vip-command-ring)
- (string-match "\\([0-9]*\e\\|^[ \t]*$\\|escape\\)"
- (vip-array-to-string (this-command-keys))))
- (vip-ring-insert (eval ring-var) item))
- )
-
-
- ;; removing elts from ring seems to break it
- (defun vip-cleanup-ring (ring)
- (or (< (ring-length ring) 2)
- (null (vip-current-ring-item ring))
- ;; last and previous equal
- (if (equal (vip-current-ring-item ring) (vip-current-ring-item ring 1))
- (vip-ring-pop ring))))
-
- ;; ring-remove seems to be buggy, so we concocted this for our purposes.
- (defun vip-ring-pop (ring)
- (let* ((ln (ring-length ring))
- (vec (cdr (cdr ring)))
- (veclen (length vec))
- (hd (car ring))
- (idx (max 0 (ring-minus1 hd ln)))
- (top-elt (aref vec idx)))
-
- ;; shift elements
- (while (< (1+ idx) veclen)
- (aset vec idx (aref vec (1+ idx)))
- (setq idx (1+ idx)))
- (aset vec idx nil)
-
- (setq hd (max 0 (ring-minus1 hd ln)))
- (if (= hd (1- ln)) (setq hd 0))
- (setcar ring hd) ; move head
- (setcar (cdr ring) (max 0 (1- ln))) ; adjust length
- top-elt
- ))
-
- (defun vip-ring-insert (ring item)
- (let* ((ln (ring-length ring))
- (vec (cdr (cdr ring)))
- (veclen (length vec))
- (hd (car ring))
- (vecpos-after-hd (if (= hd 0) ln hd))
- (idx ln))
-
- (if (= ln veclen)
- (progn
- (aset vec hd item) ; hd is always 1+ the actual head index in vec
- (setcar ring (ring-plus1 hd ln)))
- (setcar (cdr ring) (1+ ln))
- (setcar ring (ring-plus1 vecpos-after-hd (1+ ln)))
- (while (and (>= idx vecpos-after-hd) (> ln 0))
- (aset vec idx (aref vec (1- idx)))
- (setq idx (1- idx)))
- (aset vec vecpos-after-hd item))
- item))
-
-
- ;;; String utilities
-
- ;; If STRING is longer than MAX-LEN, truncate it and print ...... instead
- ;; PRE-STRING is a string to prepend to the abbrev string.
- ;; POST-STRING is a string to append to the abbrev string.
- ;; ABBREV_SIGN is a string to be inserted before POST-STRING
- ;; if the orig string was truncated.
- (defun vip-abbreviate-string (string max-len
- pre-string post-string abbrev-sign)
- (let (truncated-str)
- (setq truncated-str
- (if (stringp string)
- (substring string 0 (min max-len (length string)))))
- (cond ((null truncated-str) "")
- ((> (length string) max-len)
- (format "%s%s%s%s"
- pre-string truncated-str abbrev-sign post-string))
- (t (format "%s%s%s" pre-string truncated-str post-string)))))
-
- ;; tells if we are over a whitespace-only line
- (defsubst vip-over-whitespace-line ()
- (save-excursion
- (beginning-of-line)
- (looking-at "^[ \t]*$")))
-
-
- ;;; Saving settings in custom file
-
- ;; Save the current setting of VAR in CUSTOM-FILE.
- ;; If given, MESSAGE is a message to be displayed after that.
- ;; This message is erased after 2 secs, if erase-msg is non-nil.
- ;; Arguments: var message custom-file &optional erase-message
- (defun vip-save-setting (var message custom-file &optional erase-msg)
- (let* ((var-name (symbol-name var))
- (var-val (if (boundp var) (eval var)))
- (regexp (format "^[^;]*%s[ \t\n]*[a-zA-Z---_']*[ \t\n)]" var-name))
- (buf (find-file-noselect (substitute-in-file-name custom-file)))
- )
- (message message)
- (save-excursion
- (set-buffer buf)
- (goto-char (point-min))
- (if (re-search-forward regexp nil t)
- (let ((reg-end (1- (match-end 0))))
- (search-backward var-name)
- (delete-region (match-beginning 0) reg-end)
- (goto-char (match-beginning 0))
- (insert (format "%s '%S" var-name var-val)))
- (goto-char (point-max))
- (if (not (bolp)) (insert "\n"))
- (insert (format "(setq %s '%S)\n" var-name var-val)))
- (save-buffer))
- (kill-buffer buf)
- (if erase-msg
- (progn
- (sit-for 2)
- (message "")))
- ))
-
- ;; Save STRING in CUSTOM-FILE. If PATTERN is non-nil, remove strings that
- ;; match this pattern.
- (defun vip-save-string-in-file (string custom-file &optional pattern)
- (let ((buf (find-file-noselect (substitute-in-file-name custom-file))))
- (save-excursion
- (set-buffer buf)
- (goto-char (point-min))
- (if pattern (delete-matching-lines pattern))
- (goto-char (point-max))
- (if string (insert string))
- (save-buffer))
- (kill-buffer buf)
- ))
-
-
- ;;; Overlays
-
- ;; Search
-
- (defun vip-flash-search-pattern ()
- (if (vip-overlay-p vip-search-overlay)
- (vip-move-overlay vip-search-overlay (match-beginning 0) (match-end 0))
- (setq vip-search-overlay
- (vip-make-overlay
- (match-beginning 0) (match-end 0) (current-buffer))))
-
- (vip-overlay-put vip-search-overlay 'priority vip-search-overlay-priority)
- (if (vip-window-display-p)
- (progn
- (vip-overlay-put vip-search-overlay 'face vip-search-face)
- (sit-for 2)
- (vip-overlay-put vip-search-overlay 'face nil))))
-
- ;; Replace state
-
- (defun vip-set-replace-overlay (beg end)
- (if (vip-overlay-p vip-replace-overlay)
- (vip-move-replace-overlay beg end)
- (setq vip-replace-overlay (vip-make-overlay beg end (current-buffer)))
- (vip-overlay-put vip-replace-overlay
- 'vip-start
- (move-marker (make-marker)
- (vip-overlay-start vip-replace-overlay)))
- (vip-overlay-put vip-replace-overlay
- 'vip-end
- (move-marker (make-marker)
- (vip-overlay-end vip-replace-overlay)))
- (vip-overlay-put
- vip-replace-overlay 'priority vip-replace-overlay-priority))
- (if (vip-window-display-p)
- (vip-overlay-put vip-replace-overlay 'face vip-replace-overlay-face))
- (vip-save-cursor-color)
- (vip-change-cursor-color vip-replace-overlay-cursor-color)
- )
-
-
-
- (defsubst vip-hide-replace-overlay ()
- (vip-set-replace-overlay-glyphs nil nil)
- (vip-restore-cursor-color)
- (if (vip-window-display-p)
- (vip-overlay-put vip-replace-overlay 'face nil)))
-
- (defsubst vip-set-replace-overlay-glyphs (before-glyph after-glyph)
- (if (or (not (vip-window-display-p))
- vip-use-replace-region-delimiters)
- (let ((before-name (if vip-xemacs-p 'begin-glyph 'before-string))
- (after-name (if vip-xemacs-p 'end-glyph 'after-string)))
- (vip-overlay-put vip-replace-overlay before-name before-glyph)
- (vip-overlay-put vip-replace-overlay after-name after-glyph))))
-
-
- (defsubst vip-replace-start ()
- (vip-overlay-get vip-replace-overlay 'vip-start))
- (defsubst vip-replace-end ()
- (vip-overlay-get vip-replace-overlay 'vip-end))
-
- (defsubst vip-move-replace-overlay (beg end)
- (vip-move-overlay vip-replace-overlay beg end)
- (move-marker (vip-replace-start) (vip-overlay-start vip-replace-overlay))
- (move-marker (vip-replace-end) (vip-overlay-end vip-replace-overlay)))
-
-
- ;; Minibuffer
-
- (defun vip-set-minibuffer-overlay ()
- (vip-check-minibuffer-overlay)
- ;; We always move the minibuffer overlay, since in XEmacs
- ;; this overlay may get detached. Moving will reattach it.
- ;; This overlay is also moved via the vip-post-command-hook,
- ;; to insure that it covers the whole minibuffer.
- (vip-move-minibuffer-overlay)
- (if (vip-window-display-p)
- (progn
- (vip-overlay-put
- vip-minibuffer-overlay 'face vip-minibuffer-current-face)
- (vip-overlay-put
- vip-minibuffer-overlay 'priority vip-minibuffer-overlay-priority))
- ))
-
- (defun vip-check-minibuffer-overlay ()
- (if (vip-overlay-p vip-minibuffer-overlay)
- ()
- (setq vip-minibuffer-overlay
- (vip-make-overlay 1 (1+ (buffer-size)) (current-buffer)))))
-
- ;; arguments to this function are dummies. they are needed just because
- ;; it is used as a insert-in-front-hook to vip-minibuffer-overlay, and such
- ;; hooks require 3 arguments.
- (defun vip-move-minibuffer-overlay (&optional overl beg end)
- (if (vip-is-in-minibuffer)
- (progn
- (vip-check-minibuffer-overlay)
- (vip-move-overlay vip-minibuffer-overlay 1 (1+ (buffer-size))))))
-
- (defsubst vip-is-in-minibuffer ()
- (string-match "\*Minibuf-" (buffer-name)))
-
-
-
- ;;; XEmacs compatibility
-
- ;; Sit for VAL milliseconds. XEmacs doesn't support the millisecond arg
- ;; in sit-for, so this function smoothes out the differences.
- (defsubst vip-sit-for-short (val &optional nodisp)
- (if vip-xemacs-p
- (sit-for (/ val 1000.0) nodisp)
- (sit-for 0 val nodisp)))
-
- ;; EVENT may be a single event of a sequence of events
- (defsubst vip-ESC-event-p (event)
- (let ((ESC-keys '(?\e (control \[) escape))
- (key (vip-event-key event)))
- (member key ESC-keys)))
-
- ;; like (set-mark-command nil) but doesn't push twice, if (car mark-ring)
- ;; is the same as (mark t).
- (defsubst vip-set-mark-if-necessary ()
- (setq mark-ring (delete (vip-mark-marker) mark-ring))
- (set-mark-command nil))
-
- (defsubst vip-mark-marker ()
- (if vip-xemacs-p
- (mark-marker t)
- (mark-marker)))
-
- ;; In transient mark mode (zmacs mode), it is annoying when regions become
- ;; highlighted due to Viper's pushing marks. So, we deactivate marks, unless
- ;; the user explicitly wants highlighting, e.g., by hitting '' or ``
- (defun vip-deactivate-mark ()
- (if vip-xemacs-p
- (zmacs-deactivate-region)
- (deactivate-mark)))
-
- (defsubst vip-leave-region-active ()
- (if vip-xemacs-p
- (setq zmacs-region-stays t)))
-
-
- (defsubst vip-events-to-keys (events)
- (cond (vip-xemacs-p (events-to-keys events))
- (t events)))
-
-
- (defun vip-eval-after-load (file form)
- (if vip-emacs-p
- (eval-after-load file form)
- (or (assoc file after-load-alist)
- (setq after-load-alist (cons (list file) after-load-alist)))
- (let ((elt (assoc file after-load-alist)))
- (or (member form (cdr elt))
- (setq elt (nconc elt (list form)))))
- form
- ))
-
- ;; This is here because Emacs changed the way local hooks work.
- ;;
- ;;Add to the value of HOOK the function FUNCTION.
- ;;FUNCTION is not added if already present.
- ;;FUNCTION is added (if necessary) at the beginning of the hook list
- ;;unless the optional argument APPEND is non-nil, in which case
- ;;FUNCTION is added at the end.
- ;;
- ;;HOOK should be a symbol, and FUNCTION may be any valid function. If
- ;;HOOK is void, it is first set to nil. If HOOK's value is a single
- ;;function, it is changed to a list of functions."
- (defun vip-add-hook (hook function &optional append)
- (if (not (boundp hook)) (set hook nil))
- ;; If the hook value is a single function, turn it into a list.
- (let ((old (symbol-value hook)))
- (if (or (not (listp old)) (eq (car old) 'lambda))
- (setq old (list old)))
- (if (member function old)
- nil
- (set hook (if append
- (append old (list function)) ; don't nconc
- (cons function old))))))
-
- ;; This is here because of Emacs's changes in the semantics of add/remove-hooks
- ;; and due to the bugs they introduced.
- ;;
- ;; Remove from the value of HOOK the function FUNCTION.
- ;; HOOK should be a symbol, and FUNCTION may be any valid function. If
- ;; FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the
- ;; list of hooks to run in HOOK, then nothing is done. See `vip-add-hook'."
- (defun vip-remove-hook (hook function)
- (if (or (not (boundp hook)) ;unbound symbol, or
- (null (symbol-value hook)) ;value is nil, or
- (null function)) ;function is nil, then
- nil ;Do nothing.
- (let ((hook-value (symbol-value hook)))
- (if (consp hook-value)
- ;; don't side-effect the list
- (setq hook-value (delete function (copy-sequence hook-value)))
- (if (equal hook-value function)
- (setq hook-value nil)))
- (set hook hook-value))))
-
-
-
- ;; like read-event, but in XEmacs also try to convert to char, if possible
- (defun vip-read-event-convert-to-char ()
- (let (event)
- (if vip-emacs-p
- (read-event)
- (setq event (next-command-event))
- (or (event-to-character event)
- event))
- ))
-
- ;; This function lets function-key-map convert key sequences into logical
- ;; keys. This does a better job than vip-read-event when it comes to kbd
- ;; macros, since it enables certain macros to be shared between X and TTY
- ;; modes.
- (defun vip-read-key ()
- (let ((overriding-local-map vip-overriding-map)
- key)
- (use-global-map vip-overriding-map)
- (setq key (elt (read-key-sequence nil) 0))
- (use-global-map global-map)
- key))
-
-
- ;; Emacs has a bug in eventp, which causes (eventp nil) to return (nil)
- ;; instead of nil, if '(nil) was previously inadvertantly assigned to
- ;; unread-command-events
- (defun vip-event-key (event)
- (or (and event (eventp event))
- (error "vip-event-key: Wrong type argument, eventp, %S" event))
- (let ((mod (event-modifiers event))
- basis)
- (setq basis
- (cond
- (vip-xemacs-p
- (cond ((key-press-event-p event)
- (event-key event))
- ((button-event-p event)
- (concat "mouse-" (prin1-to-string (event-button event))))
- (t
- (error "vip-event-key: Unknown event, %S" event))))
- (t
- ;; Emacs doesn't handle capital letters correctly, since
- ;; \S-a isn't considered the same as A (it behaves as
- ;; plain `a' instead). So we take care of this here
- (cond ((and (numberp event) (<= ?A event) (<= event ?Z))
- (setq mod nil
- event event))
- ;; Emacs has the oddity whereby characters 128+char
- ;; represent M-char *if* this appears inside a string.
- ;; So, we convert them manually into (mata char).
- ((and (numberp event) (< ?\C-? event) (<= event 255))
- (setq mod '(meta)
- event (- event ?\C-? 1)))
- (t (event-basic-type event)))
- )))
-
- (if (numberp basis)
- (setq basis
- (if (= basis ?\C-?)
- (list 'control '\?) ; taking care of an emacs bug
- (intern (char-to-string basis)))))
-
- (if mod
- (append mod (list basis))
- basis)
- ))
-
- (defun vip-key-to-emacs-key (key)
- (let (key-name char-p modifiers mod-char-list base-key base-key-name)
- (cond (vip-xemacs-p key)
- ((symbolp key)
- (setq key-name (symbol-name key))
- (if (= (length key-name) 1) ; character event
- (string-to-char key-name)
- key))
- ((listp key)
- (setq modifiers (subseq key 0 (1- (length key)))
- base-key (vip-seq-last-elt key)
- base-key-name (symbol-name base-key)
- char-p (= (length base-key-name) 1))
- (setq mod-char-list
- (mapcar
- '(lambda (elt) (upcase (substring (symbol-name elt) 0 1)))
- modifiers))
- (if char-p
- (setq key-name
- (car (read-from-string
- (concat
- "?\\"
- (mapconcat 'identity mod-char-list "-\\")
- "-"
- base-key-name))))
- (setq key-name
- (intern
- (concat
- (mapconcat 'identity mod-char-list "-")
- "-"
- base-key-name))))))
- ))
-
-
- ;; Args can be a sequence of events, a string, or a Viper macro. Will try to
- ;; convert events to keys and, if all keys are regular printable
- ;; characters, will return a string. Otherwise, will return a string
- ;; representing a vector of converted events. If the input was a Viper macro,
- ;; will return a string that represents this macro as a vector.
- (defun vip-array-to-string (event-seq &optional representation)
- (let (temp)
- (cond ((stringp event-seq) event-seq)
- ((vip-event-vector-p event-seq)
- (setq temp (mapcar 'vip-event-key event-seq))
- (if (vip-char-symbol-sequence-p temp)
- (mapconcat 'symbol-name temp "")
- (prin1-to-string (vconcat temp))))
- ((vip-char-symbol-sequence-p event-seq)
- (mapconcat 'symbol-name event-seq ""))
- (t (prin1-to-string event-seq)))))
-
-
- (defsubst vip-fast-keysequence-p ()
- (not (vip-sit-for-short vip-fast-keyseq-timeout t)))
-
- (defun vip-read-char-exclusive ()
- (let (char
- (echo-keystrokes 1))
- (while (null char)
- (condition-case nil
- (setq char (read-char))
- (error
- ;; skip event if not char
- (vip-read-event))))
- char))
-
-
-
- (defun vip-setup-master-buffer (&rest other-files-or-buffers)
- "Set up the current buffer as a master buffer.
- Arguments become related buffers. This function should normally be used in
- the `Local variables' section of a file."
- (setq vip-related-files-and-buffers-ring
- (make-ring (1+ (length other-files-or-buffers))))
- (mapcar '(lambda (elt)
- (vip-ring-insert vip-related-files-and-buffers-ring elt))
- other-files-or-buffers)
- (vip-ring-insert vip-related-files-and-buffers-ring (buffer-name))
- )
-
-
- (provide 'viper-util)
-
- ;;; viper-util.el ends here
-