(defvar bg-mouse-fast-select-window nil
"*Non-nil for mouse hits to select new window, then execute; else just select.")
(defconst bg-button-r 1)
(defconst bg-button-m 2)
(defconst bg-button-c 2)
(defconst bg-button-l 4)
(defconst bg-in-modeline 8)
(defconst bg-in-scrollbar 16)
(defconst bg-in-minibuf 24)
(defconst semicolon ?\
(defvar bg-mouse-x)
(defvar bg-mouse-y)
(defvar bg-cursor-window)
(defvar mouse-map)
(defun bg-mouse-report (prefix-arg)
"Read, parse, and execute a BBN BitGraph mouse click.
L-- move point | These apply for mouse click in a window.
--R set mark | If bg-mouse-fast-select-window is nil,
L-R kill region | these commands on a nonselected window
-C- move point and yank | just select that window.
LC- yank-pop |
-CR or LCR undo | \"Scroll bar\" is right-hand window column.
on modeline: on \"scroll bar\": in minibuffer:
L-- scroll-up line to top execute-extended-command
--R scroll-down line to bottom eval-expression
-C- proportional goto-char line to middle suspend-emacs
To reinitialize the mouse if the terminal is reset, type ESC : RET"
(interactive "P")
(bg-get-tty-num semicolon)
(let*
((screen-mouse-x (min (1- (frame-width)) (/ (bg-get-tty-num semicolon) 9)))
(screen-mouse-y (- (1- (frame-height)) (/ (bg-get-tty-num semicolon) 16)))
(bg-mouse-buttons (% (bg-get-tty-num ?c) 8))
(bg-mouse-window (bg-window-from-x-y screen-mouse-x screen-mouse-y))
(bg-cursor-window (selected-window))
(edges (window-edges bg-mouse-window))
(minibuf-p (= screen-mouse-y (1- (frame-height))))
(in-modeline-p (and (not minibuf-p)
(= screen-mouse-y (1- (nth 3 edges)))))
(in-scrollbar-p (and (not minibuf-p) (not in-modeline-p)
(>= screen-mouse-x (1- (nth 2 edges)))))
(same-window-p (eq bg-mouse-window bg-cursor-window))
(in-minibuf-p (and minibuf-p
(not bg-mouse-window))) (bg-mode-bits (+ (if in-minibuf-p bg-in-minibuf 0)
(if in-modeline-p bg-in-modeline 0)
(if in-scrollbar-p bg-in-scrollbar 0)))
(bg-command
(lookup-key mouse-map
(char-to-string (+ bg-mode-bits bg-mouse-buttons))))
(bg-mouse-x (- screen-mouse-x (nth 0 edges)))
(bg-mouse-y (- screen-mouse-y (nth 1 edges))))
(cond ((or in-modeline-p in-scrollbar-p)
(select-window bg-mouse-window)
(bg-command-execute bg-command)
(select-window bg-cursor-window))
((or same-window-p in-minibuf-p)
(bg-command-execute bg-command))
(t (select-window bg-mouse-window)
(if bg-mouse-fast-select-window
(bg-command-execute bg-command)))
)))
(defun bg-set-point ()
"Move point to location of BitGraph mouse."
(interactive)
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(setq this-command 'next-line) (setq temporary-goal-column bg-mouse-x))
(defun bg-set-mark ()
"Set mark at location of BitGraph mouse."
(interactive)
(push-mark)
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(exchange-point-and-mark))
(defun bg-yank ()
"Move point to location of BitGraph mouse and yank."
(interactive "*")
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(setq this-command 'yank)
(yank))
(defun yank-pop-1 ()
(interactive "*")
(yank-pop 1))
(defun bg-yank-or-pop ()
"Move point to location of BitGraph mouse and yank. If last command
was a yank, do a yank-pop."
(interactive "*")
(if (eq last-command 'yank)
(yank-pop 1)
(bg-yank)))
(defconst bg-most-positive-fixnum 8388607)
(defun bg-move-by-percentage ()
"Go to location in buffer that is the same percentage of the way
through the buffer as the BitGraph mouse's X position in the window."
(interactive)
(goto-char
(cond ((zerop bg-mouse-x)
0)
((< (buffer-size) (/ bg-most-positive-fixnum bg-mouse-x))
(/ (* bg-mouse-x (buffer-size))
(1- (window-width))))
(t
(* (/ (buffer-size) (1- (window-width)))
bg-mouse-x))))
(beginning-of-line)
(what-cursor-position))
(defun bg-mouse-line-to-top ()
"Scroll the line pointed to by the BitGraph mouse to the top of the window."
(interactive)
(scroll-up bg-mouse-y))
(defun bg-mouse-line-to-center ()
"Scroll the line pointed to by the BitGraph mouse to the center
of the window"
(interactive)
(scroll-up (/ (+ 2 bg-mouse-y bg-mouse-y (- (window-height))) 2)))
(defun bg-mouse-line-to-bottom ()
"Scroll the line pointed to by the mouse to the bottom of the window."
(interactive)
(scroll-up (+ bg-mouse-y (- 2 (window-height)))))
(defun bg-kill-region ()
(interactive "*")
(kill-region (region-beginning) (region-end)))
(defun bg-insert-moused-sexp ()
"Insert a copy of the word (actually sexp) that the mouse is pointing at.
Sexp is inserted into the buffer at point (where the text cursor is)."
(interactive)
(let ((moused-text
(save-excursion
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(if (looking-at "\\s)")
(forward-char 1)
(forward-sexp 1))
(buffer-substring (save-excursion (backward-sexp 1) (point))
(point)))))
(select-window bg-cursor-window)
(delete-horizontal-space)
(cond
((bolp)
(indent-according-to-mode))
((save-excursion (forward-char -1)
(and (not (looking-at "\\s\""))
(looking-at "[`'\"\\]\\|\\s(")))
nil)
(t
(insert " ")))
(insert moused-text)
(or (eolp)
(looking-at "\\s.\\|\\s)")
(and (looking-at "'") (looking-at "\\sw")) (save-excursion (insert " ")))))
(defun bg-get-tty-num (term-char)
"Read from terminal until TERM-CHAR is read, and return intervening number.
If non-numeric not matching TERM-CHAR, reprogram the mouse and signal an error."
(let
((num 0)
(char (- (read-char) 48)))
(while (and (>= char 0)
(<= char 9))
(setq num (+ (* num 10) char))
(setq char (- (read-char) 48)))
(or (eq term-char (+ char 48))
(progn
(bg-program-mouse)
(error
"Invalid data format in bg-mouse command: mouse reinitialized.")))
num))
(defun bg-move-point-to-x-y (x y)
"Position cursor in window coordinates.
X and Y are 0-based character positions in the window."
(move-to-window-line y)
(let ((zero-column (current-column))
(scroll-offset (window-hscroll)))
(if (> scroll-offset 0)
(setq scroll-offset (1- scroll-offset)))
(move-to-column (+ zero-column scroll-offset x))
))
(defun bg-window-from-x-y (x y)
"Find window corresponding to screen coordinates.
X and Y are 0-based character positions on the screen."
(get-window-with-predicate (lambda (w)
(coordinates-in-window-p (cons x y) w))))
(defun bg-command-execute (bg-command)
(if (commandp bg-command)
(command-execute bg-command)
(ding)))
(defun bg-program-mouse ()
(send-string-to-terminal "\e:0;7;;;360;512;9;16;9;16c"))
(or (keymapp mouse-map)
(setq mouse-map (make-keymap)))
(defun bind-bg-mouse-click (click-code function)
"Bind bg-mouse CLICK-CODE to run FUNCTION."
(define-key mouse-map (char-to-string click-code) function))
(bind-bg-mouse-click bg-button-l 'bg-set-point)
(bind-bg-mouse-click bg-button-m 'bg-yank)
(bind-bg-mouse-click bg-button-r 'bg-set-mark)
(bind-bg-mouse-click (+ bg-button-l bg-button-m) 'yank-pop-1)
(bind-bg-mouse-click (+ bg-button-l bg-button-r) 'bg-kill-region)
(bind-bg-mouse-click (+ bg-button-m bg-button-r) 'undo)
(bind-bg-mouse-click (+ bg-button-l bg-button-m bg-button-r) 'undo)
(bind-bg-mouse-click (+ bg-in-modeline bg-button-l) 'scroll-up)
(bind-bg-mouse-click (+ bg-in-modeline bg-button-m) 'bg-move-by-percentage)
(bind-bg-mouse-click (+ bg-in-modeline bg-button-r) 'scroll-down)
(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-l) 'bg-mouse-line-to-top)
(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-m) 'bg-mouse-line-to-center)
(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-r) 'bg-mouse-line-to-bottom)
(bind-bg-mouse-click (+ bg-in-minibuf bg-button-l) 'execute-extended-command)
(bind-bg-mouse-click (+ bg-in-minibuf bg-button-m) 'suspend-emacs)
(bind-bg-mouse-click (+ bg-in-minibuf bg-button-r) 'eval-expression)
(provide 'bg-mouse)