-;;; mouse-sel.el --- Multi-click selection support for Emacs 19
-
-;; Copyright (C) 1993 Free Software Foundation, Inc.
-
-;; Author: Mike Williams <mikew@gopher.dosli.govt.nz>
-;; Keywords: mouse
-;; Version: 2.0
-
-;; 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.
-;;
-;; * 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 it's 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.
-;;
-;; * 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 "2.0"
- "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] will leave point at the end
-of the region nearest to where the mouse last was.
-If nil, point will always be placed at the beginning of the region.")
-
-(defvar mouse-sel-retain-highlight nil
- "*Retain highlight on mouse-drag-overlay.
-If non-nil, regions selected using \\[mouse-select] and \\[mouse-extend] will
-remain highlighted.
-If nil, highlighting will be turned off when the mouse is lifted.")
-
-(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 ""
- "This variable is used to store the selection value when mouse-sel is
-used on windowing systems other than X Windows.")
-
-(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-select] and \\[mouse-extend] should
-select by. The first argument is 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.
-
-On click, point & mark are set to click position, and mark is disabled.
-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))
-
-(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* ((min (if mark-active (region-beginning) (point)))
- (max (if mark-active (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 (window-frame (posn-window end))
- (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 (- end-row top)
- mouse-drag-overlay max))
- ((and end-row (not (eobp)) (>= end-row bottom))
- (mouse-scroll-subr (1+ (- end-row bottom))
- mouse-drag-overlay min))
- )))
-
- ;; On the mode line
- ((eq (posn-point end) 'mode-line)
- (mouse-scroll-subr 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."
- (interactive "e")
- (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.
+;;; mouse-sel.el --- Multi-click selection support for Emacs 19
+
+;; Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
+
+;; Author: Mike Williams <mikew@gopher.dosli.govt.nz>
+;; Keywords: mouse
+
+;; 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.
+
+;;; 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.
+;; Quad-clicking selects paragraphs.
+;;
+;; * 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 inserts the contents of the primary selection at
+;; the mouse position (or point, if mouse-yank-at-point is non-nil).
+;;
+;; * 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.
+;;
+;; * M-mouse-1, M-mouse-2 & M-mouse-3 work similarly to mouse-1, mouse-2
+;; & mouse-3, but operate on the X secondary selection rather than the
+;; primary selection and region.
+;;
+;; 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 insert 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)
+;;
+;; * By default, mouse-select cycles the click count after 4 clicks. That
+;; is, clicking mouse-1 five times has the same effect as clicking it
+;; once, clicking six 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}-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.
+;;
+;; * You can change the selection highlight face by altering the properties
+;; of mouse-drag-overlay, eg.
+;;
+;; (overlay-put mouse-drag-overlay 'face 'bold)
+
+;;; Code:
+
+(require 'mouse)
+(require 'thingatpt)
+
+(eval-when-compile
+ (require 'cl))
+
+;;=== User Variables ======================================================
+
+(defgroup mouse-sel nil
+ "Mouse selection enhancement."
+ :group 'mouse)
+
+(defcustom mouse-sel-mode nil
+ "Toggle Mouse Sel mode.
+When Mouse Sel mode is enabled, mouse selection is enhanced in various ways.
+You must modify via \\[customize] for this variable to have an effect."
+ :set (lambda (symbol value)
+ (mouse-sel-mode (or value 0)))
+ :initialize 'custom-initialize-default
+ :type 'boolean
+ :group 'mouse-sel
+ :require 'mouse-sel)
+
+(defcustom mouse-sel-leave-point-near-mouse t
+ "*Leave point near last mouse position.
+If non-nil, \\[mouse-select] and \\[mouse-extend] will leave point at the end
+of the region nearest to where the mouse last was.
+If nil, point will always be placed at the beginning of the region."
+ :type 'boolean
+ :group 'mouse-sel)
+
+(defcustom mouse-sel-cycle-clicks t
+ "*If non-nil, \\[mouse-select] cycles the click-counts after 4 clicks."
+ :type 'boolean
+ :group 'mouse-sel)
+
+(defcustom mouse-sel-default-bindings t
+ "*Control mouse bindings."
+ :type '(choice (const :tag "none" nil)
+ (const :tag "default bindings" t)
+ (const :tag "cut and paste" interprogram-cut-paste))
+ :group 'mouse-sel)
+
+;;=== User Command ========================================================
+
+;;;###autoload
+(defun mouse-sel-mode (&optional arg)
+ "Toggle Mouse Sel mode.
+With prefix ARG, turn Mouse Sel mode on if and only if ARG is positive.
+Returns the new status of Mouse Sel mode (non-nil means on).
+
+When Mouse Sel mode is enabled, mouse selection is enhanced in various ways:
+
+- 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.
+Quad-clicking selects paragraphs.
+
+- 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 inserts the contents of the primary selection at
+the mouse position (or point, if mouse-yank-at-point is non-nil).
+
+- 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.
+
+- M-mouse-1, M-mouse-2 & M-mouse-3 work similarly to mouse-1, mouse-2
+& mouse-3, but operate on the X secondary selection rather than the
+primary selection and region."
+ (interactive "P")
+ (let ((on-p (if arg
+ (> (prefix-numeric-value arg) 0)
+ (not mouse-sel-mode))))
+ (if on-p
+ (add-hook 'x-lost-selection-hooks 'mouse-sel-lost-selection-hook)
+ (remove-hook 'x-lost-selection-hooks 'mouse-sel-lost-selection-hook))
+ (mouse-sel-bindings on-p)
+ (setq mouse-sel-mode on-p)))
+
+;;=== Key bindings ========================================================
+
+(defun mouse-sel-bindings (bind)
+ (cond ((not bind)
+ ;; These bindings are taken from mouse.el, i.e., they are the default
+ ;; bindings. It would be better to restore the previous bindings.
+ ;; Primary selection bindings.
+ (global-set-key [mouse-1] 'mouse-set-point)
+ (global-set-key [mouse-2] 'mouse-yank-at-click)
+ (global-set-key [mouse-3] 'mouse-save-then-kill)
+ (global-set-key [down-mouse-1] 'mouse-drag-region)
+ (global-set-key [drag-mouse-1] 'mouse-set-region)
+ (global-set-key [double-mouse-1] 'mouse-set-point)
+ (global-set-key [triple-mouse-1] 'mouse-set-point)
+ ;; Secondary selection bindings.
+ (global-set-key [M-mouse-1] 'mouse-start-secondary)
+ (global-set-key [M-mouse-2] 'mouse-yank-secondary)
+ (global-set-key [M-mouse-3] 'mouse-secondary-save-then-kill)
+ (global-set-key [M-drag-mouse-1] 'mouse-set-secondary)
+ (global-set-key [M-down-mouse-1] 'mouse-drag-secondary))
+ (mouse-sel-default-bindings
+ ;;
+ ;; Primary selection bindings.
+ (global-unset-key [mouse-1])
+ (global-unset-key [drag-mouse-1])
+ (global-unset-key [mouse-3])
+ (global-set-key [down-mouse-1] 'mouse-select)
+ (unless (eq mouse-sel-default-bindings 'interprogram-cut-paste)
+ (global-set-key [mouse-2] 'mouse-insert-selection)
+ (setq interprogram-cut-function nil
+ interprogram-paste-function nil))
+ (global-set-key [down-mouse-3] 'mouse-extend)
+ ;;
+ ;; Secondary selection bindings.
+ (global-unset-key [M-mouse-1])
+ (global-unset-key [M-drag-mouse-1])
+ (global-unset-key [M-mouse-3])
+ (global-set-key [M-down-mouse-1] 'mouse-select-secondary)
+ (global-set-key [M-mouse-2] 'mouse-insert-secondary)
+ (global-set-key [M-down-mouse-3] 'mouse-extend-secondary))))
+
+;;=== Command Variable ====================================================
+
+;; This has to come after the function `mouse-sel-mode' and its callee.
+;; An alternative is to put the option `mouse-sel-mode' here and remove its
+;; `:initialize' keyword.
+(when mouse-sel-mode
+ (mouse-sel-mode t))
+
+;;=== Internal Variables/Constants ========================================
+
+(defvar mouse-sel-primary-thing nil
+ "Type of PRIMARY selection in current buffer.")
+(make-variable-buffer-local 'mouse-sel-primary-thing)
+
+(defvar mouse-sel-secondary-thing nil
+ "Type of SECONDARY selection in current buffer.")
+(make-variable-buffer-local 'mouse-sel-secondary-thing)
+
+;; Ensure that secondary overlay is defined
+(unless (overlayp mouse-secondary-overlay)
+ (setq mouse-secondary-overlay (make-overlay 1 1))
+ (overlay-put mouse-secondary-overlay 'face 'secondary-selection))
+
+(defconst mouse-sel-selection-alist
+ '((PRIMARY mouse-drag-overlay mouse-sel-primary-thing)
+ (SECONDARY mouse-secondary-overlay mouse-sel-secondary-thing))
+ "Alist associating selections with variables. Each element is of
+the form:
+
+ (SELECTION-NAME OVERLAY-SYMBOL SELECTION-THING-SYMBOL)
+
+where SELECTION-NAME = name of selection
+ OVERLAY-SYMBOL = name of variable containing overlay to use
+ SELECTION-THING-SYMBOL = name of variable where the current selection
+ type for this selection should be stored.")
+
+(defvar mouse-sel-set-selection-function
+ (if (eq mouse-sel-default-bindings 'interprogram-cut-paste)
+ 'x-set-selection
+ (lambda (selection value)
+ (if (eq selection 'PRIMARY)
+ (x-select-text value)
+ (x-set-selection selection value))))
+ "Function to call to set selection.
+Called with two arguments:
+
+ SELECTION, the name of the selection concerned, and
+ VALUE, the text to store.
+
+This sets the selection as well as the cut buffer for the older applications,
+unless `mouse-sel-default-bindings' is `interprogram-cut-paste'.")
+
+(defvar mouse-sel-get-selection-function
+ (lambda (selection)
+ (if (eq selection 'PRIMARY)
+ (or (x-cut-buffer-or-selection-value) x-last-selected-text)
+ (x-get-selection selection)))
+ "Function to call to get the selection.
+Called with one argument:
+
+ SELECTION: the name of the selection concerned.")
+
+;;=== Support/access functions ============================================
+
+(defun mouse-sel-determine-selection-thing (nclicks)
+ "Determine what `thing' `mouse-sel' should operate on.
+The first argument is NCLICKS, is the number of consecutive
+mouse clicks at the same position.
+
+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.
+Quad-clicking selects paragraphs.
+
+Feel free to re-define this function to support your own desired
+multi-click semantics."
+ (let* ((next-char (char-after (point)))
+ (char-syntax (if next-char (char-syntax next-char))))
+ (if mouse-sel-cycle-clicks
+ (setq nclicks (1+ (% (1- nclicks) 4))))
+ (cond
+ ((= nclicks 1) nil)
+ ((= nclicks 3) 'line)
+ ((>= nclicks 4) 'paragraph)
+ ((memq char-syntax '(?\( ?\) ?\" ?')) 'sexp)
+ ((memq next-char '(? ?\t ?\n)) 'whitespace)
+ ((eq char-syntax ?_) 'symbol)
+ ((eq char-syntax ?w) 'word))))
+
+(defun mouse-sel-set-selection (selection value)
+ "Set the specified SELECTION to VALUE."
+ (if mouse-sel-set-selection-function
+ (funcall mouse-sel-set-selection-function selection value)
+ (put 'mouse-sel-internal-selection selection value)))
+
+(defun mouse-sel-get-selection (selection)
+ "Get the value of the specified SELECTION."
+ (if mouse-sel-get-selection-function
+ (funcall mouse-sel-get-selection-function selection)
+ (get 'mouse-sel-internal-selection selection)))
+
+(defun mouse-sel-selection-overlay (selection)
+ "Return overlay corresponding to SELECTION."
+ (let ((symbol (nth 1 (assoc selection mouse-sel-selection-alist))))
+ (or symbol (error "No overlay corresponding to %s selection" selection))
+ (symbol-value symbol)))
+
+(defun mouse-sel-selection-thing (selection)
+ "Return overlay corresponding to SELECTION."
+ (let ((symbol (nth 2 (assoc selection mouse-sel-selection-alist))))
+ (or symbol (error "No symbol corresponding to %s selection" selection))
+ symbol))
+
+(defun mouse-sel-region-to-primary (orig-window)
+ "Convert region to PRIMARY overlay and deactivate region.
+Argument ORIG-WINDOW specifies the window the cursor was in when the
+originating command was issued, and is used to determine whether the
+region was visible or not."
+ (if transient-mark-mode
+ (let ((overlay (mouse-sel-selection-overlay 'PRIMARY)))
+ (cond
+ ((and mark-active
+ (or highlight-nonselected-windows
+ (eq orig-window (selected-window))))
+ ;; Region was visible, so convert region to overlay
+ (move-overlay overlay (region-beginning) (region-end)
+ (current-buffer)))
+ ((eq orig-window (selected-window))
+ ;; Point was visible, so set overlay at point
+ (move-overlay overlay (point) (point) (current-buffer)))
+ (t
+ ;; Nothing was visible, so remove overlay
+ (delete-overlay overlay)))
+ (setq mark-active nil))))
+
+(defun mouse-sel-primary-to-region (&optional direction)
+ "Convert PRIMARY overlay to region.
+Optional argument DIRECTION specifies the mouse drag direction: a value of
+1 indicates that the mouse was dragged left-to-right, otherwise it was
+dragged right-to-left."
+ (let* ((overlay (mouse-sel-selection-overlay 'PRIMARY))
+ (start (overlay-start overlay))
+ (end (overlay-end overlay)))
+ (if (eq start end)
+ (progn
+ (if start (goto-char start))
+ (deactivate-mark))
+ (if (and mouse-sel-leave-point-near-mouse (eq direction 1))
+ (progn
+ (goto-char end)
+ (push-mark start 'nomsg 'active))
+ (goto-char start)
+ (push-mark end 'nomsg 'active)))
+ (if transient-mark-mode (delete-overlay overlay))))
+
+(defmacro mouse-sel-eval-at-event-end (event &rest forms)
+ "Evaluate forms at mouse position.
+Move to the end position of EVENT, execute FORMS, and restore original
+point and window."
+ (`
+ (let ((posn (event-end (, event))))
+ (if posn (mouse-minibuffer-check (, event)))
+ (if (and posn (not (windowp (posn-window posn))))
+ (error "Cursor not in text area of window"))
+ (let (orig-window orig-point-marker)
+ (setq orig-window (selected-window))
+ (if posn (select-window (posn-window posn)))
+ (setq orig-point-marker (point-marker))
+ (if (and posn (numberp (posn-point posn)))
+ (goto-char (posn-point posn)))
+ (unwind-protect
+ (progn
+ (,@ forms))
+ (goto-char (marker-position orig-point-marker))
+ (move-marker orig-point-marker nil)
+ (select-window orig-window)
+ )))))
+
+(put 'mouse-sel-eval-at-event-end 'lisp-indent-hook 1)
+
+;;=== Select ==============================================================
+
+(defun mouse-select (event)
+ "Set region/selection using the mouse.
+
+Click sets point & mark to click position.
+Dragging extends region/selection.
+
+Multi-clicking selects word/lines/paragraphs, as determined by
+'mouse-sel-determine-selection-thing.
+
+Clicking mouse-2 while selecting copies selected text to the kill-ring.
+Clicking mouse-1 or mouse-3 kills the selected text.
+
+This should be bound to a down-mouse event."
+ (interactive "@e")
+ (let (direction)
+ (unwind-protect
+ (setq direction (mouse-select-internal 'PRIMARY event))
+ (mouse-sel-primary-to-region direction))))
+
+(defun mouse-select-secondary (event)
+ "Set secondary selection using the mouse.
+
+Click sets the start of the secondary selection to click position.
+Dragging extends the secondary selection.
+
+Multi-clicking selects word/lines/paragraphs, as determined by
+'mouse-sel-determine-selection-thing.
+
+Clicking mouse-2 while selecting copies selected text to the kill-ring.
+Clicking mouse-1 or mouse-3 kills the selected text.
+
+This should be bound to a down-mouse event."
+ (interactive "e")
+ (mouse-select-internal 'SECONDARY event))
+
+(defun mouse-select-internal (selection event)
+ "Set SELECTION using the mouse."
+ (mouse-sel-eval-at-event-end event
+ (let ((thing-symbol (mouse-sel-selection-thing selection))
+ (overlay (mouse-sel-selection-overlay selection)))
+ (set thing-symbol
+ (mouse-sel-determine-selection-thing (event-click-count event)))
+ (let ((object-bounds (bounds-of-thing-at-point
+ (symbol-value thing-symbol))))
+ (if object-bounds
+ (progn
+ (move-overlay overlay
+ (car object-bounds) (cdr object-bounds)
+ (current-buffer)))
+ (move-overlay overlay (point) (point) (current-buffer)))))
+ (mouse-extend-internal selection)))
+
+;;=== Extend ==============================================================
+
+(defun mouse-extend (event)
+ "Extend region/selection using the mouse."
+ (interactive "e")
+ (let ((orig-window (selected-window))
+ direction)
+ (select-window (posn-window (event-end event)))
+ (unwind-protect
+ (progn
+ (mouse-sel-region-to-primary orig-window)
+ (setq direction (mouse-extend-internal 'PRIMARY event)))
+ (mouse-sel-primary-to-region direction))))
+
+(defun mouse-extend-secondary (event)
+ "Extend secondary selection using the mouse."
+ (interactive "e")
+ (save-window-excursion
+ (mouse-extend-internal 'SECONDARY event)))
+
+(defun mouse-extend-internal (selection &optional initial-event)
+ "Extend specified SELECTION using the mouse.
+Track mouse-motion events, adjusting the SELECTION appropriately.
+Optional argument INITIAL-EVENT specifies an initial down-mouse event to
+process.
+
+See documentation for mouse-select-internal for more details."
+ (mouse-sel-eval-at-event-end initial-event
+ (let ((orig-cursor-type
+ (cdr (assoc 'cursor-type (frame-parameters (selected-frame))))))
+ (unwind-protect
+
+ (let* ((thing-symbol (mouse-sel-selection-thing selection))
+ (overlay (mouse-sel-selection-overlay selection))
+ (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)))
+ (mark-active nil) ; inhibit normal region highlight
+ (echo-keystrokes 0) ; don't echo mouse events
+ min max
+ direction
+ event)
+
+ ;; Get current bounds of overlay
+ (if (eq (overlay-buffer overlay) (current-buffer))
+ (setq min (overlay-start overlay)
+ max (overlay-end overlay))
+ (setq min (point)
+ max min)
+ (set thing-symbol nil))
+
+
+ ;; Bar cursor
+ (if (fboundp 'modify-frame-parameters)
+ (modify-frame-parameters (selected-frame)
+ '((cursor-type . bar))))
+
+ ;; Handle dragging
+ (track-mouse
+
+ (while (if initial-event ; Use initial event
+ (prog1
+ (setq event initial-event)
+ (setq initial-event nil))
+ (setq event (read-event))
+ (and (consp event)
+ (memq (car event) '(mouse-movement switch-frame))))
+
+ (let ((selection-thing (symbol-value thing-symbol))
+ (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)
+ overlay max))
+ ((and end-row (not (eobp)) (>= end-row bottom))
+ (mouse-scroll-subr orig-window (1+ (- end-row bottom))
+ overlay min))
+ )))
+
+ ;; On the mode line
+ ((eq (posn-point end) 'mode-line)
+ (mouse-scroll-subr orig-window 1 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 selection-thing) 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)))
+ (goto-char (if (eq 1 direction) min max))
+ (condition-case nil
+ (progn
+ (while (> (* direction (- goal (point))) 0)
+ (forward-thing selection-thing direction))
+ (let ((end (point)))
+ (forward-thing selection-thing (- direction))
+ (goto-char
+ (if (> (* direction (- goal (point))) 0)
+ end (point)))))
+ (error))))
+
+ ;; Move overlay
+ (move-overlay overlay
+ (if (eq 1 direction) min (point))
+ (if (eq -1 direction) max (point))
+ (current-buffer))
+
+ ))) ; end track-mouse
+
+ ;; Finish up after dragging
+ (let ((overlay-start (overlay-start overlay))
+ (overlay-end (overlay-end overlay)))
+
+ ;; Set selection
+ (if (not (eq overlay-start overlay-end))
+ (mouse-sel-set-selection
+ selection
+ (buffer-substring overlay-start overlay-end)))
+
+ ;; Handle copy/kill
+ (let (this-command)
+ (cond
+ ((eq (event-basic-type last-input-event) 'mouse-2)
+ (copy-region-as-kill overlay-start overlay-end)
+ (read-event) (read-event))
+ ((and (memq (event-basic-type last-input-event)
+ '(mouse-1 mouse-3))
+ (memq 'down (event-modifiers last-input-event)))
+ (kill-region overlay-start overlay-end)
+ (move-overlay overlay overlay-start overlay-start)
+ (read-event) (read-event))
+ ((and (eq (event-basic-type last-input-event) 'mouse-3)
+ (memq 'double (event-modifiers last-input-event)))
+ (kill-region overlay-start overlay-end)
+ (move-overlay overlay overlay-start overlay-start)))))
+
+ direction)
+
+ ;; Restore cursor
+ (if (fboundp 'modify-frame-parameters)
+ (modify-frame-parameters
+ (selected-frame) (list (cons 'cursor-type orig-cursor-type))))
+
+ ))))
+
+;;=== Paste ===============================================================
+
+(defun mouse-insert-selection (event)
+ "Insert the contents of the PRIMARY selection at mouse click.
+If `mouse-yank-at-point' is non-nil, insert at point instead."
+ (interactive "e")
+ (mouse-insert-selection-internal 'PRIMARY event))
+
+(defun mouse-insert-secondary (event)
+ "Insert the contents of the SECONDARY selection at mouse click.
+If `mouse-yank-at-point' is non-nil, insert at point instead."
+ (interactive "e")
+ (mouse-insert-selection-internal 'SECONDARY event))
+
+(defun mouse-insert-selection-internal (selection event)
+ "Insert the contents of the named SELECTION at mouse click.
+If `mouse-yank-at-point' is non-nil, insert at point instead."
+ (unless mouse-yank-at-point
+ (mouse-set-point event))
+ (when mouse-sel-get-selection-function
+ (push-mark (point) 'nomsg)
+ (insert (or (funcall mouse-sel-get-selection-function selection) ""))))
+
+;;=== Handle loss of selections ===========================================
+
+(defun mouse-sel-lost-selection-hook (selection)
+ "Remove the overlay for a lost selection."
+ (let ((overlay (mouse-sel-selection-overlay selection)))
+ (delete-overlay overlay)))
+
+;;=== Bug reporting =======================================================
+
+;(defconst mouse-sel-maintainer-address "mikew@gopher.dosli.govt.nz")
+
+;(defun mouse-sel-submit-bug-report ()
+; "Submit a bug report on mouse-sel.el via mail."
+; (interactive)
+; (require 'reporter)
+; (reporter-submit-bug-report
+; mouse-sel-maintainer-address
+; (concat "mouse-sel.el "
+; (or (condition-case nil mouse-sel-version (error))
+; "(distributed with Emacs)"))
+; (list 'transient-mark-mode
+; 'delete-selection-mode
+; 'mouse-sel-default-bindings
+; 'mouse-sel-leave-point-near-mouse
+; 'mouse-sel-cycle-clicks
+; 'mouse-sel-selection-alist
+; 'mouse-sel-set-selection-function
+; 'mouse-sel-get-selection-function
+; 'mouse-yank-at-point)))
+
+(provide 'mouse-sel)
+
+;; mouse-sel.el ends here.
HCoop / bpt / emacs.git / blobdiff