1
0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-11 09:20:51 +00:00
emacs/lisp/t-mouse.el
Nick Roberts be0a287b76 (t-mouse-make-event-element): Use timestamp output
from client program, mev, to compute mouse event.
2007-03-19 20:07:45 +00:00

307 lines
12 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; t-mouse.el --- mouse support within the text terminal
;; Authors: Alessandro Rubini and Ian T Zimmerman
;; Maintainer: Nick Roberts <nickrob@gnu.org>
;; Keywords: mouse gpm linux
;; Copyright (C) 1994, 1995, 1998, 2006, 2007 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; This package provides access to mouse event as reported by the
;; gpm-Linux package. It uses the program "mev" to get mouse events.
;; It tries to reproduce the functionality offered by Emacs under X.
;; The "gpm" server runs under Linux, so this package is rather
;; Linux-dependent.
;; Modified by Nick Roberts for Emacs 22. In particular, the mode-line is
;; now position sensitive.
(defvar t-mouse-process nil
"Embeds the process which passes mouse events to Emacs.
It is used by the program t-mouse.")
(defvar t-mouse-filter-accumulator ""
"Accumulates input from the mouse reporting process.")
(defvar t-mouse-debug-buffer nil
"Events normally posted to command queue are printed here in debug mode.
See `t-mouse-start-debug'.")
(defvar t-mouse-current-xy '(0 . 0)
"Stores the last mouse position t-mouse has been told about.")
(defvar t-mouse-drag-start nil
"Whenever a drag starts in a special part of a window
\(not the text), the `translated' starting coordinates including the
window and part involved are saved here. This is necessary lest they
get re-translated when the button goes up, at which time window
configuration may have changed.")
(defvar t-mouse-prev-set-selection-function 'x-set-selection)
(defvar t-mouse-prev-get-selection-function 'x-get-selection)
(defvar t-mouse-swap-alt-keys nil
"When set, Emacs will handle mouse events with the right Alt
\(a.k.a. Alt-Ger) modifier, not with the regular left Alt modifier.
Useful for people who play strange games with their keyboard tables.")
(defvar t-mouse-fix-21 nil
"Enable brain-dead chords for 2 button mice.")
;;; Code:
;; get the number of the current virtual console
(defun t-mouse-tty ()
"Return number of virtual terminal Emacs is running on, as a string.
For example, \"2\" for /dev/tty2."
(with-temp-buffer
(call-process "ps" nil t nil "h" (format "%s" (emacs-pid)))
(goto-char (point-min))
(if (or
;; Many versions of "ps", all different....
(re-search-forward " +tty\\(.?[0-9a-f]\\)" nil t)
(re-search-forward "p \\([0-9a-f]\\)" nil t)
(re-search-forward "v0\\([0-9a-f]\\)" nil t)
(re-search-forward "[0-9]+ +\\([0-9]+\\)" nil t)
(re-search-forward "[\\t ]*[0-9]+[\\t ]+\\([0-9]+\\)" nil t)
(re-search-forward " +vc/\\(.?[0-9a-f]\\)" nil t)
(re-search-forward " +pts/\\(.?[0-9a-f]\\)" nil t))
(buffer-substring (match-beginning 1) (match-end 1)))))
;; due to a horrible kludge in Emacs' keymap handler
;; (read_key_sequence) mouse clicks on funny parts of windows generate
;; TWO events, the first being a dummy of the sort '(mode-line).
;; That's why Per Abrahamsen's code in xt-mouse.el doesn't work for
;; the modeline, for instance.
;; now get this: the Emacs C code that generates these fake events
;; depends on certain things done by the very lowest level input
;; handlers; namely the symbols for the events (for instance
;; 'C-S-double-mouse-2) must have an 'event-kind property, set to
;; 'mouse-click. Since events from unread-command-events do not pass
;; through the low level handlers, they don't get this property unless
;; I set it myself. I imagine this has caused innumerable attempts by
;; hackers to do things similar to t-mouse to lose.
;; The next page of code is devoted to fixing this ugly problem.
;; WOW! a fully general powerset generator
;; (C) Ian Zimmerman Mon Mar 23 12:00:16 PST 1998 :-)
(defun t-mouse-powerset (l)
(if (null l) '(nil)
(let ((l1 (t-mouse-powerset (cdr l)))
(first (nth 0 l)))
(append
(mapcar (function (lambda (l) (cons first l))) l1) l1))))
;; and a slightly less general cartesian product
(defun t-mouse-cartesian (l1 l2)
(if (null l1) l2
(append (mapcar (function (lambda (x) (append (nth 0 l1) x))) l2)
(t-mouse-cartesian (cdr l1) l2))))
(let* ((modifier-sets (t-mouse-powerset '(control meta shift)))
(typed-sets (t-mouse-cartesian '((down) (drag))
'((mouse-1) (mouse-2) (mouse-3))))
(multipled-sets (t-mouse-cartesian '((double) (triple)) typed-sets))
(all-sets (t-mouse-cartesian modifier-sets multipled-sets)))
(while all-sets
(let ((event-sym (event-convert-list (nth 0 all-sets))))
(if (not (get event-sym 'event-kind))
(put event-sym 'event-kind 'mouse-click)))
(setq all-sets (cdr all-sets))))
(defun t-mouse-make-event-element (x-dot-y-avec-time)
(let* ((x-dot-y (nth 0 x-dot-y-avec-time))
(time (nth 1 x-dot-y-avec-time))
(x (car x-dot-y))
(y (cdr x-dot-y))
(w (window-at x y))
(ltrb (window-edges w))
(left (nth 0 ltrb))
(top (nth 1 ltrb))
(event (if w
(posn-at-x-y (- x left) (- y top) w t)
(append (list nil 'menu-bar)
(nthcdr 2 (posn-at-x-y x y w t))))))
(setcar (nthcdr 3 event) time)
event))
;;; This fun is partly Copyright (C) 1994 Per Abrahamsen <abraham@iesd.auc.dk>
(defun t-mouse-make-event ()
"Make a Lisp style event from the contents of mouse input accumulator.
Also trim the accumulator by all the data used to build the event."
(let (ob (ob-pos (condition-case nil
(progn
;; this test is just needed for Fedora Core 3
(if (string-match "STILL RUNNING_1\n"
t-mouse-filter-accumulator)
(setq t-mouse-filter-accumulator
(substring
t-mouse-filter-accumulator (match-end 0))))
(read-from-string t-mouse-filter-accumulator))
(error nil))))
;; this test is just needed for Fedora Core 3
(if (or (eq (car ob-pos) 'STILL) (eq (car ob-pos) '***) (not ob-pos))
nil
(setq ob (car ob-pos))
(setq t-mouse-filter-accumulator
(substring t-mouse-filter-accumulator (cdr ob-pos)))
;;now the real work
(let ((event-type (nth 0 ob))
(current-xy-avec-time (nth 1 ob))
(type-switch (length ob)))
(if t-mouse-fix-21
(let
;;Acquire the event's symbol's name.
((event-name-string (symbol-name event-type))
end-of-root-event-name
new-event-name-string)
(if (string-match "-\\(21\\|\\12\\)$" event-name-string)
;;Transform the name to what it should have been.
(progn
(setq end-of-root-event-name (match-beginning 0))
(setq new-event-name-string
(concat (substring
event-name-string 0
end-of-root-event-name) "-3"))
;;Change the event to the symbol that corresponds to the
;;name we made. The proper symbol already exists.
(setq event-type
(intern new-event-name-string))))))
;;store current position for mouse-position
(setq t-mouse-current-xy (nth 0 current-xy-avec-time))
;;events have many types but fortunately they differ in length
(cond
((= type-switch 4) ;must be drag
(let ((count (nth 2 ob))
(start-element
(or t-mouse-drag-start
(t-mouse-make-event-element (nth 3 ob))))
(end-element
(t-mouse-make-event-element current-xy-avec-time)))
(setq t-mouse-drag-start nil)
(list event-type start-element end-element count)))
((= type-switch 3) ;down or up
(let ((count (nth 2 ob))
(element
(t-mouse-make-event-element current-xy-avec-time)))
(if (and (not t-mouse-drag-start)
(symbolp (nth 1 element)))
;; OUCH! GOTCHA! emacs uses setc[ad]r on these!
(setq t-mouse-drag-start (copy-sequence element))
(setq t-mouse-drag-start nil))
(list event-type element count)))
((= type-switch 2) ;movement
(list (if (eq 'vertical-scroll-bar
(nth 1 t-mouse-drag-start)) 'scroll-bar-movement
'mouse-movement)
(t-mouse-make-event-element current-xy-avec-time))))))))
(defun t-mouse-process-filter (proc string)
(setq t-mouse-filter-accumulator
(concat t-mouse-filter-accumulator string))
(let ((event (t-mouse-make-event)))
(while event
(if (or track-mouse
(not (eq 'mouse-movement (event-basic-type event))))
(setq unread-command-events
(nconc unread-command-events (list event))))
(if t-mouse-debug-buffer
(print unread-command-events t-mouse-debug-buffer))
(setq event (t-mouse-make-event)))))
(defun t-mouse-mouse-position-function (pos)
"Return the t-mouse-position unless running with a window system.
The (secret) scrollbar interface is not implemented yet."
(setcdr pos t-mouse-current-xy)
pos)
;; It should be possible to just send SIGTSTP to the inferior with
;; stop-process. That doesn't work; mev receives the signal fine but
;; is not really stopped: instead it returns from
;; kill(getpid(), SIGTSTP) immediately. I don't understand what's up
;; itz Tue Mar 24 14:27:38 PST 1998.
(add-hook 'suspend-hook
(function (lambda ()
(and t-mouse-process
;(stop-process t-mouse-process)
(process-send-string
t-mouse-process "push -enone -dall -Mnone\n")))))
(add-hook 'suspend-resume-hook
(function (lambda ()
(and t-mouse-process
;(continue-process t-mouse-process)
(process-send-string t-mouse-process "pop\n")))))
;;;###autoload
(define-minor-mode t-mouse-mode
"Toggle t-mouse mode.
With prefix arg, turn t-mouse mode on iff arg is positive.
Turn it on to use Emacs mouse commands, and off to use t-mouse commands."
nil " Mouse" nil :global t
(if t-mouse-mode
;; Turn it on
(unless window-system
;; Starts getting a stream of mouse events from an asynchronous process.
;; Only works if Emacs is running on a virtual terminal without a window system.
(progn
(setq mouse-position-function #'t-mouse-mouse-position-function)
(let ((tty (t-mouse-tty))
(process-connection-type t))
(if (not (stringp tty))
(error "Cannot find a virtual terminal"))
(setq t-mouse-process
(start-process "t-mouse" nil
"mev" "-i" "-E" "-C" tty
(if t-mouse-swap-alt-keys
"-M-leftAlt" "-M-rightAlt")
"-e-move"
"-dall" "-d-hard"
"-f")))
(setq t-mouse-filter-accumulator "")
(set-process-filter t-mouse-process 't-mouse-process-filter)
(set-process-query-on-exit-flag t-mouse-process nil)))
;; Turn it off
(setq mouse-position-function nil)
(delete-process t-mouse-process)
(setq t-mouse-process nil)))
(provide 't-mouse)
;; arch-tag: a63163b3-bfbe-4eb2-ab4f-201cd164b05d
;;; t-mouse.el ends here