-;;; mouse.el --- window system-independent mouse support
+;;; mouse.el --- window system-independent mouse support -*- lexical-binding: t -*-
;; Copyright (C) 1993-1995, 1999-2012 Free Software Foundation, Inc.
"Popup the given menu and call the selected option.
MENU can be a keymap, an easymenu-style menu or a list of keymaps as for
`x-popup-menu'.
-POSITION can be a click event or ((XOFFSET YOFFSET) WINDOW) and defaults to
- the current mouse position. If POSITION is a symbol, `point' the current point
-position is used.
+The menu is shown at the place where POSITION specifies. About
+the form of POSITION, see `popup-menu-normalize-position'.
PREFIX is the prefix argument (if any) to pass to the command."
(let* ((map (cond
((keymapp menu) menu)
(filter (when (symbolp map)
(plist-get (get map 'menu-prop) :filter))))
(if filter (funcall filter (symbol-function map)) map)))))
- event cmd)
- (setq position
- (cond
- ((eq position 'point)
- (let* ((pp (posn-at-point pos window))
- (xy (posn-x-y pp)))
- (list (list (car xy) (cdr xy)) (posn-window pp))))
- ((not position)
- (let ((mp (mouse-pixel-position)))
- (list (list (cadr mp) (cddr mp)) (car mp))))
- (t
- position)))
+ event cmd
+ (position (popup-menu-normalize-position position)))
;; The looping behavior was taken from lmenu's popup-menu-popup
(while (and map (setq event
;; map could be a prefix key, in which case
binding)
(while (and map (null binding))
(setq binding (lookup-key (car map) mouse-click))
- (if (numberp binding) ; `too long'
+ (if (numberp binding) ; `too long'
(setq binding nil))
(setq map (cdr map)))
binding)
;; mouse-major-mode-menu was using `command-execute' instead.
(call-interactively cmd))))
+(defun popup-menu-normalize-position (position)
+ "Convert the POSITION to the form which `popup-menu' expects internally.
+POSITION can an event, a posn- value, a value having
+form ((XOFFSET YOFFSET) WINDOW), or nil.
+If nil, the current mouse position is used."
+ (pcase position
+ ;; nil -> mouse cursor position
+ (`nil
+ (let ((mp (mouse-pixel-position)))
+ (list (list (cadr mp) (cddr mp)) (car mp))))
+ ;; Value returned from `event-end' or `posn-at-point'.
+ ((pred posnp)
+ (let ((xy (posn-x-y position)))
+ (list (list (car xy) (cdr xy))
+ (posn-window position))))
+ ;; Event.
+ ((pred eventp)
+ (popup-menu-normalize-position (event-end position)))
+ (t position)))
+
(defun minor-mode-menu-from-indicator (indicator)
"Show menu for minor mode specified by INDICATOR.
Interactively, INDICATOR is read using completion.
;; Start tracking.
(track-mouse
- ;; Loop reading events and sampling the position of the mouse,
- ;; until there is a non-mouse-movement event. Also,
- ;; scroll-bar-movement events are the same as mouse movement for
- ;; our purposes. (Why? -- cyd)
- (while (progn
- (setq event (read-event))
- (memq (car-safe event) '(mouse-movement scroll-bar-movement)))
+ ;; Loop reading events and sampling the position of the mouse.
+ (while draggable
+ (setq event (read-event))
(setq position (mouse-position))
+ ;; Do nothing if
+ ;; - there is a switch-frame event.
+ ;; - the mouse isn't in the frame that we started in
+ ;; - the mouse isn't in any Emacs frame
+ ;; Drag if
+ ;; - there is a mouse-movement event
+ ;; - there is a scroll-bar-movement event (Why? -- cyd)
+ ;; (same as mouse movement for our purposes)
+ ;; Quit if
+ ;; - there is a keyboard event or some other unknown event.
(cond
+ ((not (consp event))
+ (setq draggable nil))
+ ((memq (car event) '(switch-frame select-window))
+ nil)
+ ((not (memq (car event) '(mouse-movement scroll-bar-movement)))
+ (when (consp event)
+ ;; Do not unread a drag-mouse-1 event to avoid selecting
+ ;; some other window. For vertical line dragging do not
+ ;; unread mouse-1 events either (but only if we dragged at
+ ;; least once to allow mouse-1 clicks get through.
+ (unless (and dragged
+ (if (eq line 'vertical)
+ (memq (car event) '(drag-mouse-1 mouse-1))
+ (eq (car event) 'drag-mouse-1)))
+ (push event unread-command-events)))
+ (setq draggable nil))
((or (not (eq (car position) frame))
- (null (cadr position)))
+ (null (car (cdr position))))
nil)
((eq line 'vertical)
;; Drag vertical divider.
(setcar event 'mouse-2))
(push event unread-command-events)))
-
(defun mouse-drag-mode-line (start-event)
"Change the height of a window by dragging on the mode line."
(interactive "e")
(choice
;; Either choice == 'x-select-font, or choice is a
;; symbol whose name is a font.
- (buffer-face-mode-invoke (font-face-attributes
- (if (eq choice 'x-select-font)
- (x-select-font)
- (symbol-name choice)))
- t
- (called-interactively-p 'interactive))))))))
+ (let ((font (if (eq choice 'x-select-font)
+ (x-select-font)
+ (symbol-name choice))))
+ (buffer-face-mode-invoke
+ (if (fontp font 'font-spec)
+ (list :font font)
+ (font-face-attributes font))
+ t (called-interactively-p 'interactive)))))))))
\f
;;; Bindings for mouse commands.