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- ;;; viper-mous.el --- mouse support for Viper
-
- ;; Copyright (C) 1994, 1995, 1996 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, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;; Code
-
- (require 'viper-util)
-
- ;; compiler pacifier
- (defvar double-click-time)
- (defvar mouse-track-multi-click-time)
- ;; end compiler pacifier
-
-
- ;;; Variables
-
- ;; Variable used for catching the switch-frame event.
- ;; If non-nil, indicates that previous-frame should be the selected
- ;; one. Used by vip-mouse-click-get-word. Not a user option.
- (defvar vip-frame-of-focus nil)
-
- ;; Frame that was selected before the switch-frame event.
- (defconst vip-current-frame-saved (selected-frame))
-
- (defvar vip-surrounding-word-function 'vip-surrounding-word
- "*Function that determines what constitutes a word for clicking events.
- Takes two parameters: a COUNT, indicating how many words to return,
- and CLICK-COUNT, telling whether this is the first click, a double-click,
- or a tripple-click.")
-
- ;; time interval in millisecond within which successive clicks are
- ;; considered related
- (defconst vip-multiclick-timeout (if vip-xemacs-p
- mouse-track-multi-click-time
- double-click-time)
- "*Time interval in millisecond within which successive clicks are
- considered related.")
-
- ;; current event click count; XEmacs only
- (defvar vip-current-click-count 0)
- ;; time stamp of the last click event; XEmacs only
- (defvar vip-last-click-event-timestamp 0)
-
- ;; Local variable used to toggle wraparound search on click.
- (vip-deflocalvar vip-mouse-click-search-noerror t)
-
- ;; Local variable used to delimit search after wraparound.
- (vip-deflocalvar vip-mouse-click-search-limit nil)
-
- ;; remembers prefix argument to pass along to commands invoked by second
- ;; click.
- ;; This is needed because in Emacs (not XEmacs), assigning to preix-arg
- ;; causes Emacs to count the second click as if it was a single click
- (defvar vip-global-prefix-argument nil)
-
-
-
- ;;; Code
-
- (defsubst vip-multiclick-p ()
- (not (vip-sit-for-short vip-multiclick-timeout t)))
-
- ;; Returns window where click occurs
- (defsubst vip-mouse-click-window (click)
- (if vip-xemacs-p
- (event-window click)
- (posn-window (event-start click))))
-
- ;; Returns window where click occurs
- (defsubst vip-mouse-click-frame (click)
- (window-frame (vip-mouse-click-window click)))
-
- ;; Returns the buffer of the window where click occurs
- (defsubst vip-mouse-click-window-buffer (click)
- (window-buffer (vip-mouse-click-window click)))
-
- ;; Returns the name of the buffer in the window where click occurs
- (defsubst vip-mouse-click-window-buffer-name (click)
- (buffer-name (vip-mouse-click-window-buffer click)))
-
- ;; Returns position of a click
- (defsubst vip-mouse-click-posn (click)
- (if vip-xemacs-p
- (event-point click)
- (posn-point (event-start click))))
-
-
- (defun vip-surrounding-word (count click-count)
- "Returns word surrounding point according to a heuristic.
- COUNT indicates how many regions to return.
- If CLICK-COUNT is 1, `word' is a word in Vi sense.
- If CLICK-COUNT is 2,then `word' is a Word in Vi sense.
- If the character clicked on is a non-separator and is non-alphanumeric but
- is adjacent to an alphanumeric symbol, then it is considered alphanumeric
- for the purpose of this command. If this character has a matching
- character, such as `\(' is a match for `\)', then the matching character is
- also considered alphanumeric.
- For convenience, in Lisp modes, `-' is considered alphanumeric.
-
- If CLICK-COUNT is 3 or more, returns the line clicked on with leading and
- trailing space and tabs removed. In that case, the first argument, COUNT,
- is ignored."
- (let ((modifiers "")
- beg skip-flag result
- word-beg)
- (if (> click-count 2)
- (save-excursion
- (beginning-of-line)
- (vip-skip-all-separators-forward 'within-line)
- (setq beg (point))
- (end-of-line)
- (setq result (buffer-substring beg (point))))
-
- (if (and (not (vip-looking-at-alphasep))
- (or (save-excursion (vip-backward-char-carefully)
- (vip-looking-at-alpha))
- (save-excursion (vip-forward-char-carefully)
- (vip-looking-at-alpha))))
- (setq modifiers
- (cond ((looking-at "\\\\") "\\\\")
- ((looking-at "-") "C-C-")
- ((looking-at "[][]") "][")
- ((looking-at "[()]") ")(")
- ((looking-at "[{}]") "{}")
- ((looking-at "[<>]") "<>")
- ((looking-at "[`']") "`'")
- ((looking-at "\\^") "\\^")
- ((vip-looking-at-separator) "")
- (t (char-to-string (following-char))))
- ))
-
- ;; Add `-' to alphanum, if it wasn't added and if we are in Lisp
- (or (looking-at "-")
- (not (string-match "lisp" (symbol-name major-mode)))
- (setq modifiers (concat modifiers "C-C-")))
-
-
- (save-excursion
- (cond ((> click-count 1) (vip-skip-nonseparators 'backward))
- ((vip-looking-at-alpha modifiers)
- (vip-skip-alpha-backward modifiers))
- ((not (vip-looking-at-alphasep modifiers))
- (vip-skip-nonalphasep-backward))
- (t (if (> click-count 1)
- (vip-skip-nonseparators 'backward)
- (vip-skip-alpha-backward modifiers))))
-
- (setq word-beg (point))
-
- (setq skip-flag nil) ; don't move 1 char forw the first time
- (while (> count 0)
- (if skip-flag (vip-forward-char-carefully 1))
- (setq skip-flag t) ; now always move 1 char forward
- (if (> click-count 1)
- (vip-skip-nonseparators 'forward)
- (vip-skip-alpha-forward modifiers))
- (setq count (1- count)))
-
- (setq result (buffer-substring word-beg (point))))
- ) ; if
- ;; XEmacs doesn't have set-text-properties, but there buffer-substring
- ;; doesn't return properties together with the string, so it's not needed.
- (if vip-emacs-p
- (set-text-properties 0 (length result) nil result))
- result
- ))
-
-
- (defun vip-mouse-click-get-word (click count click-count)
- "Returns word surrounding the position of a mouse click.
- Click may be in another window. Current window and buffer isn't changed.
- On single or double click, returns the word as determined by
- `vip-surrounding-word-function'."
-
- (let ((click-word "")
- (click-pos (vip-mouse-click-posn click))
- (click-buf (vip-mouse-click-window-buffer click)))
- (or (natnump count) (setq count 1))
- (or (natnump click-count) (setq click-count 1))
-
- (save-excursion
- (save-window-excursion
- (if click-pos
- (progn
- (set-buffer click-buf)
-
- (goto-char click-pos)
- (setq click-word
- (funcall vip-surrounding-word-function count click-count)))
- (error "Click must be over a window."))
- click-word))))
-
-
- (defun vip-mouse-click-insert-word (click arg)
- "Insert word clicked or double-clicked on.
- With prefix argument, N, insert that many words.
- This command must be bound to a mouse click.
- The double-click action of the same mouse button must not be bound
- \(or it must be bound to the same function\).
- See `vip-surrounding-word' for the definition of a word in this case."
- (interactive "e\nP")
- (if vip-frame-of-focus ;; to handle clicks in another frame
- (select-frame vip-frame-of-focus))
-
- ;; turn arg into a number
- (cond ((integerp arg) nil)
- ;; prefix arg is a list when one hits C-u then command
- ((and (listp arg) (integerp (car arg)))
- (setq arg (car arg)))
- (t (setq arg 1)))
-
- (let (click-count interrupting-event)
- (if (and
- (vip-multiclick-p)
- ;; This trick checks if there is a pending mouse event
- ;; if so, we use this latter event and discard the current mouse click
- ;; If the next pending event is not a mouse event, we execute
- ;; the current mouse event
- (progn
- (setq interrupting-event (vip-read-event))
- (vip-mouse-event-p last-input-event)))
- (progn ;; interrupted wait
- (setq vip-global-prefix-argument arg)
- ;; count this click for XEmacs
- (vip-event-click-count click))
- ;; uninterrupted wait or the interrupting event wasn't a mouse event
- (setq click-count (vip-event-click-count click))
- (if (> click-count 1)
- (setq arg vip-global-prefix-argument
- vip-global-prefix-argument nil))
- (insert (vip-mouse-click-get-word click arg click-count))
- (if (and interrupting-event
- (eventp interrupting-event)
- (not (vip-mouse-event-p interrupting-event)))
- (vip-set-unread-command-events interrupting-event))
- )))
-
- ;; arg is an event. accepts symbols and numbers, too
- (defun vip-mouse-event-p (event)
- (if (eventp event)
- (string-match "\\(mouse-\\|frame\\|screen\\|track\\)"
- (prin1-to-string (vip-event-key event)))))
-
- ;; XEmacs has no double-click events. So, we must simulate.
- ;; So, we have to simulate event-click-count.
- (defun vip-event-click-count (click)
- (if vip-xemacs-p
- (progn
- ;; if more than 1 second
- (if (> (- (event-timestamp click) vip-last-click-event-timestamp)
- vip-multiclick-timeout)
- (setq vip-current-click-count 0))
- (setq vip-last-click-event-timestamp (event-timestamp click)
- vip-current-click-count (1+ vip-current-click-count)))
- (event-click-count click)))
-
-
-
- (defun vip-mouse-click-search-word (click arg)
- "Find the word clicked or double-clicked on. Word may be in another window.
- With prefix argument, N, search for N-th occurrence.
- This command must be bound to a mouse click. The double-click action of the
- same button must not be bound \(or it must be bound to the same function\).
- See `vip-surrounding-word' for the details on what constitutes a word for
- this command."
- (interactive "e\nP")
- (if vip-frame-of-focus ;; to handle clicks in another frame
- (select-frame vip-frame-of-focus))
- (let (click-word click-count
- (previous-search-string vip-s-string))
-
- (if (and
- (vip-multiclick-p)
- ;; This trick checks if there is a pending mouse event
- ;; if so, we use this latter event and discard the current mouse click
- ;; If the next pending event is not a mouse event, we execute
- ;; the current mouse event
- (progn
- (vip-read-event)
- (vip-mouse-event-p last-input-event)))
- (progn ;; interrupted wait
- (setq vip-global-prefix-argument
- (or vip-global-prefix-argument arg))
- ;; remember command that was before the multiclick
- (setq this-command last-command)
- ;; make sure we counted this event---needed for XEmacs only
- (vip-event-click-count click))
- ;; uninterrupted wait
- (setq click-count (vip-event-click-count click))
- (setq click-word (vip-mouse-click-get-word click nil click-count))
-
- (if (> click-count 1)
- (setq arg vip-global-prefix-argument
- vip-global-prefix-argument nil))
- (setq arg (or arg 1))
-
- (vip-deactivate-mark)
- (if (or (not (string= click-word vip-s-string))
- (not (markerp vip-search-start-marker))
- (not (equal (marker-buffer vip-search-start-marker)
- (current-buffer)))
- (not (eq last-command 'vip-mouse-click-search-word)))
- (progn
- (setq vip-search-start-marker (point-marker)
- vip-local-search-start-marker vip-search-start-marker
- vip-mouse-click-search-noerror t
- vip-mouse-click-search-limit nil)
-
- ;; make search string known to Viper
- (setq vip-s-string (if vip-re-search
- (regexp-quote click-word)
- click-word))
- (if (not (string= vip-s-string (car vip-search-history)))
- (setq vip-search-history
- (cons vip-s-string vip-search-history)))
- ))
-
- (push-mark nil t)
- (while (> arg 0)
- (vip-forward-word 1)
- (condition-case nil
- (progn
- (if (not (search-forward click-word vip-mouse-click-search-limit
- vip-mouse-click-search-noerror))
- (progn
- (setq vip-mouse-click-search-noerror nil)
- (setq vip-mouse-click-search-limit
- (save-excursion
- (if (and
- (markerp vip-local-search-start-marker)
- (marker-buffer vip-local-search-start-marker))
- (goto-char vip-local-search-start-marker))
- (vip-line-pos 'end)))
-
- (goto-char (point-min))
- (search-forward click-word
- vip-mouse-click-search-limit nil)))
- (goto-char (match-beginning 0))
- (message "Searching for: %s" vip-s-string)
- (if (<= arg 1)
- (vip-flash-search-pattern))
- )
- (error (beep 1)
- (if (or (not (string= click-word previous-search-string))
- (not (eq last-command 'vip-mouse-click-search-word)))
- (message "`%s': String not found in %s"
- vip-s-string (buffer-name (current-buffer)))
- (message
- "`%s': Last occurrence in %s. Back to beginning of search"
- click-word (buffer-name (current-buffer)))
- (setq arg 1) ;; to terminate the loop
- (sit-for 2))
- (setq vip-mouse-click-search-noerror t)
- (setq vip-mouse-click-search-limit nil)
- (if (and (markerp vip-local-search-start-marker)
- (marker-buffer vip-local-search-start-marker))
- (goto-char vip-local-search-start-marker))))
- (setq arg (1- arg)))
- )))
-
- (defun vip-mouse-catch-frame-switch (event arg)
- "Catch the event of switching frame.
- Usually is bound to a 'down-mouse' event to work properly. See sample
- bindings in viper.el and in the Viper manual."
- (interactive "e\nP")
- (setq vip-frame-of-focus nil)
- ;; pass prefix arg along to vip-mouse-click-search/insert-word
- (setq prefix-arg arg)
- (if (eq last-command 'handle-switch-frame)
- (setq vip-frame-of-focus vip-current-frame-saved))
- ;; make Emacs forget that it executed vip-mouse-catch-frame-switch
- (setq this-command last-command))
-
- ;; Called just before switching frames. Saves the old selected frame.
- ;; Sets last-command to handle-switch-frame (this is done automatically in
- ;; Emacs.
- ;; The semantics of switching frames is different in Emacs and XEmacs.
- ;; In Emacs, if you select-frame A while mouse is over frame B and then
- ;; start typing, input goes to frame B, which becomes selected.
- ;; In XEmacs, input will go to frame A. This may be a bug in one of the
- ;; Emacsen, but also may be a design decision.
- ;; Also, in Emacs sending input to frame B generates handle-switch-frame
- ;; event, while in XEmacs it doesn't.
- ;; All this accounts for the difference in the behavior of
- ;; vip-mouse-click-* commands when you click in a frame other than the one
- ;; that was the last to receive input. In Emacs, focus will be in frame A
- ;; until you do something other than vip-mouse-click-* command.
- ;; In XEmacs, you have to manually select frame B (with the mouse click) in
- ;; order to shift focus to frame B.
- (defsubst vip-remember-current-frame (frame)
- (setq last-command 'handle-switch-frame
- vip-current-frame-saved (selected-frame)))
-
-
- (cond ((vip-window-display-p)
- (let* ((search-key (if vip-xemacs-p
- [(meta shift button1up)] [M-S-mouse-1]))
- (search-key-catch (if vip-xemacs-p
- [(meta shift button1)] [M-S-down-mouse-1]))
- (insert-key (if vip-xemacs-p
- [(meta shift button2up)] [M-S-mouse-2]))
- (insert-key-catch (if vip-xemacs-p
- [(meta shift button2)] [M-S-down-mouse-2]))
- (search-key-unbound (and (not (key-binding search-key))
- (not (key-binding search-key-catch))))
- (insert-key-unbound (and (not (key-binding insert-key))
- (not (key-binding insert-key-catch))))
- )
-
- (if search-key-unbound
- (global-set-key search-key 'vip-mouse-click-search-word))
- (if insert-key-unbound
- (global-set-key insert-key 'vip-mouse-click-insert-word))
-
- ;; The following would be needed if you want to use the above two
- ;; while clicking in another frame. If you only want to use them
- ;; by clicking in another window, not frame, the bindings below
- ;; aren't necessary.
-
- ;; These must be bound to mouse-down event for the same mouse
- ;; buttons as 'vip-mouse-click-search-word and
- ;; 'vip-mouse-click-insert-word
- (if search-key-unbound
- (global-set-key search-key-catch 'vip-mouse-catch-frame-switch))
- (if insert-key-unbound
- (global-set-key insert-key-catch 'vip-mouse-catch-frame-switch))
-
- (if vip-xemacs-p
- (add-hook 'mouse-leave-frame-hook
- 'vip-remember-current-frame)
- (defadvice handle-switch-frame (before vip-frame-advice activate)
- "Remember the selected frame before the switch-frame event."
- (vip-remember-current-frame (selected-frame))))
- )))
-
-
-
- (provide 'viper-mous)
-
- ;;; viper-mous.el ends here
-