Commit e66feb07 authored by Richard M. Stallman's avatar Richard M. Stallman

(mouse-start-secondary): New function.

(mouse-set-secondary, mouse-drag-secondary): New functions.
(mouse-kill-secondary, mouse-secondary-save-then-kill): New functions.
parent 1bf41cb0
......@@ -161,7 +161,7 @@ This must be bound to a button-down mouse event."
(push-mark newmark t t)
;; Turn off the old mark when we set up an empty region.
(setq deactivate-mark t))))
;; Subroutine: set the mark where CLICK happened,
;; but don't do anything else.
(defun mouse-set-mark-fast (click)
......@@ -252,7 +252,109 @@ which prepares for a second click to delete the text."
(setq mouse-save-then-kill-posn
(list (car kill-ring) (point) click-posn)))))
(global-set-key [M-mouse-1] 'mouse-start-secondary)
(global-set-key [M-drag-mouse-1] 'mouse-set-secondary)
(global-set-key [M-down-mouse-1] 'mouse-drag-secondary)
(global-set-key [M-mouse-3] 'mouse-secondary-save-then-kill)
(global-set-key [M-mouse-2] 'mouse-kill-secondary)
;; An overlay which records the current secondary selection
;; or else is deleted when there is no secondary selection.
;; May be nil.
(defvar mouse-secondary-overlay nil)
;; A marker which records the specified first end for a secondary selection.
;; May be nil.
(defvar mouse-secondary-start nil)
(defun mouse-start-secondary (click)
"Set one end of the secondary selection to the position clicked on.
Use \\[mouse-secondary-save-then-kill] to set the other end
and complete the secondary selection."
(interactive "e")
(let ((posn (event-start click)))
(select-window (posn-window posn))
;; Cancel any preexisting secondary selection.
(if mouse-secondary-overlay
(delete-overlay mouse-secondary-overlay))
(if (numberp (posn-point posn))
(or mouse-secondary-start
(setq mouse-secondary-start (make-marker)))
(move-marker mouse-secondary-start (posn-point posn))))))
(defun mouse-set-secondary (click)
"Set the secondary selection to the text that the mouse is dragged over.
This must be bound to a mouse drag event."
(interactive "e")
(let ((posn (event-start click))
(end (event-end click)))
(select-window (posn-window posn))
(if (numberp (posn-point posn))
(setq beg (posn-point posn)))
(if mouse-secondary-overlay
(move-overlay mouse-secondary-overlay beg (posn-point end))
(setq mouse-secondary-overlay (make-overlay beg (posn-point end))))
(overlay-put mouse-secondary-overlay 'face 'secondary-selection)))
(defun mouse-drag-secondary (click)
"Set the secondary selection to the text that the mouse is dragged over.
This must be bound to a button-down mouse event."
(interactive "e")
(let ((posn (event-start click)))
(select-window (posn-window posn))
;; Set point temporarily, so user sees where it is.
(if (numberp (posn-point posn))
(goto-char (posn-point posn)))))
(defun mouse-kill-secondary ()
"Kill the text in the secondary selection."
(interactive "*")
(kill-region (overlay-start mouse-secondary-overlay)
(overlay-end mouse-secondary-overlay))
(delete-overlay mouse-secondary-overlay)
(setq mouse-secondary-overlay nil))
(defun mouse-secondary-save-then-kill (click)
"Save text to secondary start point in kill ring; if twice, kill it.
If the text between secondary start point and the mouse is the same as what's
at the front of the kill ring, this deletes the text.
Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
which prepares for a second click to delete the text."
(interactive "e")
(let ((click-posn (posn-point (event-start click)))
(start (+ 0 mouse-secondary-start))
;; Don't let a subsequent kill command append to this one:
;; prevent setting this-command to kill-region.
(this-command this-command))
(if (and (eq last-command 'mouse-secondary-save-then-kill)
(eq (car mouse-save-then-kill-posn) (car kill-ring))
(equal (cdr mouse-save-then-kill-posn)
(list start click-posn)))
;; If this is the second time we've called
;; mouse-save-then-kill, delete the text from the buffer.
(let ((buffer-undo-list t))
(delete-overlay mouse-secondary-overlay)
(delete-region start click-posn))
;; Make the undo list by hand so it is shared.
(if (not (eq buffer-undo-list t))
(setq buffer-undo-list
(cons (cons (car kill-ring) start)
;; Otherwise, save this region.
(select-window (posn-window (event-start click)))
(kill-ring-save start click-posn)
(if mouse-secondary-overlay
(move-overlay mouse-secondary-overlay start click-posn)
(setq mouse-secondary-overlay (make-overlay start click-posn)))
(overlay-put mouse-secondary-overlay 'face 'secondary-selection)
(setq mouse-save-then-kill-posn
(list (car kill-ring) start click-posn)))))
(defun mouse-buffer-menu (event)
"Pop up a menu of buffers for selection with the mouse.
This switches buffers in the window that you clicked on,
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