mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-28 07:45:00 +00:00
455 lines
16 KiB
EmacsLisp
455 lines
16 KiB
EmacsLisp
;;; mouse-sel.el --- Multi-click selection support for Emacs 19
|
|
|
|
;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
|
|
|
|
;; Author: Mike Williams <mikew@gopher.dosli.govt.nz>
|
|
;; Keywords: mouse
|
|
;; Version: 2.1
|
|
|
|
;; 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.
|
|
|
|
;;; Commentary:
|
|
;;
|
|
;; This module provides multi-click mouse support for GNU Emacs versions
|
|
;; 19.18 and later. I've tried to make it behave more like standard X
|
|
;; clients (eg. xterm) than the default Emacs 19 mouse selection handlers.
|
|
;; Basically:
|
|
;;
|
|
;; * Clicking mouse-1 starts (cancels) selection, dragging extends it.
|
|
;;
|
|
;; * Clicking or dragging mouse-3 extends the selection as well.
|
|
;;
|
|
;; * Double-clicking on word constituents selects words.
|
|
;; Double-clicking on symbol constituents selects symbols.
|
|
;; Double-clicking on quotes or parentheses selects sexps.
|
|
;; Double-clicking on whitespace selects whitespace.
|
|
;; Triple-clicking selects lines.
|
|
;;
|
|
;; * Selecting sets the region & X primary selection, but does NOT affect
|
|
;; the kill-ring. Because the mouse handlers set the primary selection
|
|
;; directly, mouse-sel sets the variables interprogram-cut-function
|
|
;; and interprogram-paste-function to nil.
|
|
;;
|
|
;; * Clicking mouse-2 pastes contents of primary selection at the mouse
|
|
;; position.
|
|
;;
|
|
;; * Pressing mouse-2 while selecting or extending copies selection
|
|
;; to the kill ring. Pressing mouse-1 or mouse-3 kills it.
|
|
;;
|
|
;; * Double-clicking mouse-3 also kills selection.
|
|
;;
|
|
;; This module requires my thingatpt.el module, which it uses to find the
|
|
;; bounds of words, lines, sexps, etc.
|
|
;;
|
|
;; Thanks to KevinB@bartley.demon.co.uk for his useful input.
|
|
;;
|
|
;;--- Customisation -------------------------------------------------------
|
|
;;
|
|
;; * You may want to use none or more of following:
|
|
;;
|
|
;; ;; Enable region highlight
|
|
;; (transient-mark-mode 1)
|
|
;;
|
|
;; ;; But only in the selected window
|
|
;; (setq highlight-nonselected-windows nil)
|
|
;;
|
|
;; ;; Enable pending-delete
|
|
;; (delete-selection-mode 1)
|
|
;;
|
|
;; * You can control the way mouse-sel binds its keys by setting the value
|
|
;; of mouse-sel-default-bindings before loading mouse-sel.
|
|
;;
|
|
;; (a) If mouse-sel-default-bindings = t (the default)
|
|
;;
|
|
;; Mouse sets and pastes selection
|
|
;; mouse-1 mouse-select
|
|
;; mouse-2 mouse-insert-selection
|
|
;; mouse-3 mouse-extend
|
|
;;
|
|
;; Selection/kill-ring interaction is disabled
|
|
;; interprogram-cut-function = nil
|
|
;; interprogram-paste-function = nil
|
|
;;
|
|
;; (b) If mouse-sel-default-bindings = 'interprogram-cut-paste
|
|
;;
|
|
;; Mouse sets selection, and pastes from kill-ring
|
|
;; mouse-1 mouse-select
|
|
;; mouse-2 mouse-yank-at-click
|
|
;; mouse-3 mouse-extend
|
|
;;
|
|
;; Selection/kill-ring interaction is retained
|
|
;; interprogram-cut-function = x-select-text
|
|
;; interprogram-paste-function = x-cut-buffer-or-selection-value
|
|
;;
|
|
;; What you lose is the ability to select some text in
|
|
;; delete-selection-mode and yank over the top of it.
|
|
;;
|
|
;; (c) If mouse-sel-default-bindings = nil, no bindings are made.
|
|
;;
|
|
;; * By default, mouse-insert-selection (mouse-2) inserts the selection at
|
|
;; the mouse position. You can tell it to insert at point instead with:
|
|
;;
|
|
;; (setq mouse-yank-at-point t)
|
|
;;
|
|
;; * I like to leave point at the end of the region nearest to where the
|
|
;; mouse was, even though this makes region highlighting mis-leading (the
|
|
;; cursor makes it look like one extra character is selected). You can
|
|
;; disable this behaviour with:
|
|
;;
|
|
;; (setq mouse-sel-leave-point-near-mouse nil)
|
|
;;
|
|
;; * Normally, the selection highlight will be removed when the mouse is
|
|
;; lifted. You can tell mouse-sel to retain the selection highlight
|
|
;; (useful if you don't use transient-mark-mode) with:
|
|
;;
|
|
;; (setq mouse-sel-retain-highlight t)
|
|
;;
|
|
;; * By default, mouse-select cycles the click count after 3 clicks. That
|
|
;; is, clicking mouse-1 four times has the same effect as clicking it
|
|
;; once, clicking five times has the same effect as clicking twice, etc.
|
|
;; Disable this behaviour with:
|
|
;;
|
|
;; (setq mouse-sel-cycle-clicks nil)
|
|
;;
|
|
;; * The variables mouse-sel-{set,get,check}-selection-function control how
|
|
;; the selection is handled. Under X Windows, these variables default so
|
|
;; that the X primary selection is used. Under other windowing systems,
|
|
;; alternate functions are used, which simply store the selection value
|
|
;; in a variable.
|
|
;;
|
|
;;--- Hints ---------------------------------------------------------------
|
|
;;
|
|
;; * You can change the selection highlight face by altering the properties
|
|
;; of mouse-drag-overlay, eg.
|
|
;;
|
|
;; (overlay-put mouse-drag-overlay 'face 'bold)
|
|
;;
|
|
;; * Pasting from the primary selection under emacs 19.19 is SLOW (there's
|
|
;; a two second delay). The following code will cause mouse-sel to use
|
|
;; the cut buffer rather than the primary selection. However, be aware
|
|
;; that cut buffers are OBSOLETE, and some X applications may not support
|
|
;; them.
|
|
;;
|
|
;; (setq mouse-sel-set-selection-function 'x-select-text
|
|
;; mouse-sel-get-selection-function 'x-get-cut-buffer)
|
|
;;
|
|
;;--- Warnings ------------------------------------------------------------
|
|
;;
|
|
;; * When selecting sexps, the selection extends by sexps at the same
|
|
;; nesting level. This also means the selection cannot be extended out
|
|
;; of the enclosing nesting level. This is INTENTIONAL.
|
|
|
|
;;; Code: =================================================================
|
|
|
|
(provide 'mouse-sel)
|
|
|
|
(require 'mouse)
|
|
(require 'thingatpt)
|
|
|
|
;;=== Version =============================================================
|
|
|
|
(defconst mouse-sel-version "2.1"
|
|
"The version number of mouse-sel (as string).")
|
|
|
|
;;=== User Variables ======================================================
|
|
|
|
(defvar mouse-sel-leave-point-near-mouse t
|
|
"*Leave point near last mouse position.
|
|
If non-nil, \\[mouse-select] and \\[mouse-extend] leave point at the end
|
|
of the region nearest to where the mouse last was.
|
|
If nil, point is always placed at the beginning of the region.")
|
|
|
|
(defvar mouse-sel-retain-highlight nil
|
|
"*Retain highlight after dragging is finished.
|
|
If non-nil, regions selected using \\[mouse-select] and \\[mouse-extend] will
|
|
remain highlighted.
|
|
If nil, highlighting turns off when you release the mouse button.")
|
|
|
|
(defvar mouse-sel-cycle-clicks t
|
|
"*If non-nil, \\[mouse-select] cycles the click-counts after 3 clicks.
|
|
Ie. 4 clicks = 1 click, 5 clicks = 2 clicks, etc.")
|
|
|
|
(defvar mouse-sel-default-bindings t
|
|
"Set to nil before loading `mouse-sel' to prevent default mouse bindings.")
|
|
|
|
;;=== Selection ===========================================================
|
|
|
|
(defvar mouse-sel-selection-type nil "Type of current selection")
|
|
(make-variable-buffer-local 'mouse-sel-selection-type)
|
|
|
|
(defvar mouse-sel-selection ""
|
|
"Store the selection value when using a window systems other than X.")
|
|
|
|
(defvar mouse-sel-set-selection-function
|
|
(if (fboundp 'x-set-selection)
|
|
(function (lambda (s) (x-set-selection 'PRIMARY s)))
|
|
(function (lambda (s) (setq mouse-sel-selection s))))
|
|
"Function to call to set selection.
|
|
Called with one argument, the text to select.")
|
|
|
|
(defvar mouse-sel-get-selection-function
|
|
(if (fboundp 'x-get-selection)
|
|
'x-get-selection
|
|
(function (lambda () mouse-sel-selection)))
|
|
"Function to call to get the selection.
|
|
Called with no argument.")
|
|
|
|
(defvar mouse-sel-check-selection-function
|
|
(if (fboundp 'x-selection-owner-p)
|
|
'x-selection-owner-p
|
|
nil)
|
|
"Function to check whether Emacs still owns the selection.
|
|
Called with no arguments.")
|
|
|
|
(defun mouse-sel-determine-selection-type (NCLICKS)
|
|
"Determine what \"thing\" `mouse-sel' should operate on.
|
|
The first argument, NCLICKS, is the number of consecutive
|
|
mouse clicks at the same position."
|
|
(let* ((next-char (char-after (point)))
|
|
(char-syntax (if next-char (char-syntax next-char)))
|
|
(nclicks (if mouse-sel-cycle-clicks (1+ (% (1- NCLICKS) 3)) NCLICKS)))
|
|
(cond
|
|
((= nclicks 1) nil)
|
|
((>= nclicks 3) 'line)
|
|
((memq char-syntax '(?\( ?\) ?\" ?')) 'sexp)
|
|
((memq next-char '(? ?\t ?\n)) 'whitespace)
|
|
((eq char-syntax ?_) 'symbol)
|
|
((eq char-syntax ?w) 'word))))
|
|
|
|
(defun mouse-select (EVENT)
|
|
"Set region/selection using the mouse.
|
|
|
|
Clicking sets point to click position, and deactivates the mark
|
|
if you are in Transient Mark mode.
|
|
Dragging extends region/selection.
|
|
|
|
Double-clicking on word constituents selects words.
|
|
Double-clicking on symbol constituents selects symbols.
|
|
Double-clicking on quotes or parentheses selects sexps.
|
|
Double-clicking on whitespace selects whitespace.
|
|
Triple-clicking selects lines.
|
|
|
|
Clicking mouse-2 while selecting copies the region to the kill-ring.
|
|
Clicking mouse-1 or mouse-3 kills the region.
|
|
|
|
This should be bound to a down-mouse event."
|
|
(interactive "e")
|
|
(mouse-set-point EVENT)
|
|
(setq mouse-sel-selection-type
|
|
(mouse-sel-determine-selection-type (event-click-count EVENT)))
|
|
(let ((object-bounds (bounds-of-thing-at-point mouse-sel-selection-type)))
|
|
(if object-bounds
|
|
(progn
|
|
(setq mark-active t)
|
|
(goto-char (car object-bounds))
|
|
(set-mark (cdr object-bounds)))
|
|
(deactivate-mark)))
|
|
(mouse-extend (if mouse-sel-selection-type EVENT)))
|
|
|
|
(defun mouse-extend (&optional EVENT)
|
|
"Extend region/selection using the mouse.
|
|
|
|
See documentation for mouse-select for more details.
|
|
|
|
This should be bound to a down-mouse event."
|
|
(interactive "e")
|
|
(if EVENT (select-window (posn-window (event-end EVENT))))
|
|
(let* ((use-region (and (or EVENT transient-mark-mode) mark-active))
|
|
(min (if use-region (region-beginning) (point)))
|
|
(max (if use-region (region-end) (point)))
|
|
(orig-window (selected-window))
|
|
(orig-window-frame (window-frame orig-window))
|
|
(top (nth 1 (window-edges orig-window)))
|
|
(bottom (nth 3 (window-edges orig-window)))
|
|
(orig-cursor-type
|
|
(cdr (assoc 'cursor-type (frame-parameters (selected-frame)))))
|
|
direction
|
|
event)
|
|
|
|
;; Inhibit normal region highlight
|
|
(setq mark-active nil)
|
|
|
|
;; Highlight region (forcing re-highlight)
|
|
(move-overlay mouse-drag-overlay min max (current-buffer))
|
|
(overlay-put mouse-drag-overlay 'face
|
|
(overlay-get mouse-drag-overlay 'face))
|
|
|
|
;; Bar cursor
|
|
(if (fboundp 'modify-frame-parameters)
|
|
(modify-frame-parameters (selected-frame) '((cursor-type . bar))))
|
|
|
|
;; Handle dragging
|
|
(unwind-protect
|
|
(progn
|
|
(track-mouse
|
|
|
|
(while (if EVENT ; Use initial event
|
|
(prog1
|
|
(setq event EVENT)
|
|
(setq EVENT nil))
|
|
(setq event (read-event))
|
|
(and (consp event)
|
|
(memq (car event) '(mouse-movement switch-frame))))
|
|
|
|
(let ((end (event-end event)))
|
|
|
|
(cond
|
|
|
|
;; Ignore any movement outside the frame
|
|
((eq (car-safe event) 'switch-frame) nil)
|
|
((and (posn-window end)
|
|
(not (eq (let ((posn-w (posn-window end)))
|
|
(if (windowp posn-w)
|
|
(window-frame posn-w)
|
|
posn-w))
|
|
(window-frame orig-window)))) nil)
|
|
|
|
;; Different window, same frame
|
|
((not (eq (posn-window end) orig-window))
|
|
(let ((end-row (cdr (cdr (mouse-position)))))
|
|
(cond
|
|
((and end-row (not (bobp)) (< end-row top))
|
|
(mouse-scroll-subr orig-window (- end-row top)
|
|
mouse-drag-overlay max))
|
|
((and end-row (not (eobp)) (>= end-row bottom))
|
|
(mouse-scroll-subr orig-window (1+ (- end-row bottom))
|
|
mouse-drag-overlay min))
|
|
)))
|
|
|
|
;; On the mode line
|
|
((eq (posn-point end) 'mode-line)
|
|
(mouse-scroll-subr orig-window 1 mouse-drag-overlay min))
|
|
|
|
;; In original window
|
|
(t (goto-char (posn-point end)))
|
|
|
|
)
|
|
;; Determine direction of drag
|
|
(cond
|
|
((and (not direction) (not (eq min max)))
|
|
(setq direction (if (< (point) (/ (+ min max) 2)) -1 1)))
|
|
((and (not (eq direction -1)) (<= (point) min))
|
|
(setq direction -1))
|
|
((and (not (eq direction 1)) (>= (point) max))
|
|
(setq direction 1)))
|
|
|
|
(if (not mouse-sel-selection-type) nil
|
|
|
|
;; If dragging forward, goal is next character
|
|
(if (and (eq direction 1) (not (eobp))) (forward-char 1))
|
|
|
|
;; Move to start/end of selected thing
|
|
(let ((goal (point))
|
|
last)
|
|
(goto-char (if (eq 1 direction) min max))
|
|
(condition-case nil
|
|
(progn
|
|
(while (> (* direction (- goal (point))) 0)
|
|
(setq last (point))
|
|
(forward-thing mouse-sel-selection-type
|
|
direction))
|
|
(let ((end (point)))
|
|
(forward-thing mouse-sel-selection-type
|
|
(- direction))
|
|
(goto-char
|
|
(if (> (* direction (- goal (point))) 0)
|
|
end last))))
|
|
(error))))
|
|
|
|
;; Move overlay
|
|
(move-overlay mouse-drag-overlay
|
|
(if (eq 1 direction) min (point))
|
|
(if (eq -1 direction) max (point))
|
|
(current-buffer))
|
|
|
|
))) ; end track-mouse
|
|
|
|
(let ((overlay-start (overlay-start mouse-drag-overlay))
|
|
(overlay-end (overlay-end mouse-drag-overlay)))
|
|
|
|
;; Set region
|
|
(if (eq overlay-start overlay-end)
|
|
(deactivate-mark)
|
|
(if (and mouse-sel-leave-point-near-mouse (eq direction 1))
|
|
(progn
|
|
(set-mark overlay-start)
|
|
(goto-char overlay-end))
|
|
(set-mark overlay-end)
|
|
(goto-char overlay-start)))
|
|
|
|
;; Set selection
|
|
(if (and mark-active mouse-sel-set-selection-function)
|
|
(funcall mouse-sel-set-selection-function
|
|
(buffer-substring overlay-start overlay-end)))
|
|
|
|
;; Handle copy/kill
|
|
(cond
|
|
((eq (car-safe last-input-event) 'down-mouse-2)
|
|
(copy-region-as-kill overlay-start overlay-end)
|
|
(read-event) (read-event))
|
|
((memq (car-safe last-input-event) '(down-mouse-1 down-mouse-3))
|
|
(kill-region overlay-start overlay-end)
|
|
(deactivate-mark)
|
|
(read-event) (read-event))
|
|
((eq (car-safe last-input-event) 'double-mouse-3)
|
|
(kill-region overlay-start overlay-end)
|
|
(deactivate-mark)))))
|
|
|
|
;; Restore cursor
|
|
(if (fboundp 'modify-frame-parameters)
|
|
(modify-frame-parameters
|
|
(selected-frame) (list (cons 'cursor-type orig-cursor-type))))
|
|
|
|
;; Remove overlay
|
|
(or mouse-sel-retain-highlight
|
|
(delete-overlay mouse-drag-overlay)))))
|
|
|
|
(defun mouse-insert-selection (click)
|
|
"Insert the contents of the selection at mouse click.
|
|
If `mouse-yank-at-point' is non-nil, insert at point instead."
|
|
(interactive "e")
|
|
(or mouse-yank-at-point
|
|
(mouse-set-point click))
|
|
(deactivate-mark)
|
|
(if mouse-sel-get-selection-function
|
|
(insert (or (funcall mouse-sel-get-selection-function) ""))))
|
|
|
|
(defun mouse-sel-validate-selection ()
|
|
"Remove selection highlight if emacs no longer owns the primary selection."
|
|
(or (not mouse-sel-check-selection-function)
|
|
(funcall mouse-sel-check-selection-function)
|
|
(delete-overlay mouse-drag-overlay)))
|
|
|
|
(add-hook 'pre-command-hook 'mouse-sel-validate-selection)
|
|
|
|
;;=== Key bindings ========================================================
|
|
|
|
(if (not mouse-sel-default-bindings) nil
|
|
|
|
(global-unset-key [mouse-1])
|
|
(global-unset-key [drag-mouse-1])
|
|
(global-unset-key [mouse-3])
|
|
|
|
(global-set-key [down-mouse-1] 'mouse-select)
|
|
(global-set-key [down-mouse-3] 'mouse-extend)
|
|
|
|
(if (eq mouse-sel-default-bindings 'interprogram-cut-paste) nil
|
|
|
|
(global-set-key [mouse-2] 'mouse-insert-selection)
|
|
(setq interprogram-cut-function nil
|
|
interprogram-paste-function nil))
|
|
|
|
)
|
|
|
|
;; mouse-sel.el ends here.
|