mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-05 08:53:45 +00:00
acf681d713
(windmove-coordinates-of-window-position): Remove. (windmove-reference-loc): Use posn-at-point instead.
575 lines
25 KiB
EmacsLisp
575 lines
25 KiB
EmacsLisp
;;; windmove.el --- directional window-selection routines
|
|
;;
|
|
;; Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004,
|
|
;; 2005 Free Software Foundation, Inc.
|
|
;;
|
|
;; Author: Hovav Shacham (hovav@cs.stanford.edu)
|
|
;; Created: 17 October 1998
|
|
;; Keywords: window, movement, convenience
|
|
;;
|
|
;; 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., 51 Franklin Street, Fifth Floor,
|
|
;; Boston, MA 02110-1301, USA.
|
|
;;
|
|
;; --------------------------------------------------------------------
|
|
|
|
;;; Commentary:
|
|
;;
|
|
;; This package defines a set of routines, windmove-{left,up,right,
|
|
;; down}, for selection of windows in a frame geometrically. For
|
|
;; example, `windmove-right' selects the window immediately to the
|
|
;; right of the currently-selected one. This functionality is similar
|
|
;; to the window-selection controls of the BRIEF editor of yore.
|
|
;;
|
|
;; One subtle point is what happens when the window to the right has
|
|
;; been split vertically; for example, consider a call to
|
|
;; `windmove-right' in this setup:
|
|
;;
|
|
;; -------------
|
|
;; | | A |
|
|
;; | | |
|
|
;; | |-----
|
|
;; | * | | (* is point in the currently
|
|
;; | | B | selected window)
|
|
;; | | |
|
|
;; -------------
|
|
;;
|
|
;; There are (at least) three reasonable things to do:
|
|
;; (1) Always move to the window to the right of the top edge of the
|
|
;; selected window; in this case, this policy selects A.
|
|
;; (2) Always move to the window to the right of the bottom edge of
|
|
;; the selected window; in this case, this policy selects B.
|
|
;; (3) Move to the window to the right of point in the selected
|
|
;; window. This may select either A or B, depending on the
|
|
;; position of point; in the illustrated example, it would select
|
|
;; B.
|
|
;;
|
|
;; Similar issues arise for all the movement functions. Windmove
|
|
;; resolves this problem by allowing the user to specify behavior
|
|
;; through a prefix argument. The cases are thus:
|
|
;; * if no argument is given to the movement functions, or the
|
|
;; argument given is zero, movement is relative to point;
|
|
;; * if a positive argument is given, movement is relative to the top
|
|
;; or left edge of the selected window, depending on whether the
|
|
;; movement is to be horizontal or vertical;
|
|
;; * if a negative argument is given, movement is relative to the
|
|
;; bottom or right edge of the selected window, depending on whether
|
|
;; the movement is to be horizontal or vertical.
|
|
;;
|
|
;;
|
|
;; Another feature enables wrap-around mode when the variable
|
|
;; `windmove-wrap-around' is set to a non-nil value. In this mode,
|
|
;; movement that falls off the edge of the frame will wrap around to
|
|
;; find the window on the opposite side of the frame. Windmove does
|
|
;; the Right Thing about the minibuffer; for example, consider:
|
|
;;
|
|
;; -------------
|
|
;; | * |
|
|
;; |-----------|
|
|
;; | A |
|
|
;; |-----------| (* is point in the currently
|
|
;; | B | C | selected window)
|
|
;; | | |
|
|
;; -------------
|
|
;;
|
|
;; With wraparound enabled, windmove-down will move to A, while
|
|
;; windmove-up will move to the minibuffer if it is active, or to
|
|
;; either B or C depending on the prefix argument.
|
|
;;
|
|
;;
|
|
;; A set of default keybindings is supplied: shift-{left,up,right,down}
|
|
;; invoke the corresponding Windmove function. See the installation
|
|
;; section if you wish to use these keybindings.
|
|
|
|
|
|
;; Installation:
|
|
;;
|
|
;; Put the following line in your `.emacs' file:
|
|
;;
|
|
;; (windmove-default-keybindings) ; shifted arrow keys
|
|
;;
|
|
;; or
|
|
;;
|
|
;; (windmove-default-keybindings 'hyper) ; etc.
|
|
;;
|
|
;; to use another modifier key.
|
|
;;
|
|
;;
|
|
;; If you wish to enable wrap-around, also add a line like:
|
|
;;
|
|
;; (setq windmove-wrap-around t)
|
|
;;
|
|
;;
|
|
;; Note: If you have an Emacs that manifests a bug that sometimes
|
|
;; causes the occasional creation of a "lost column" between windows,
|
|
;; so that two adjacent windows do not actually touch, you may want to
|
|
;; increase the value of `windmove-window-distance-delta' to 2 or 3:
|
|
;;
|
|
;; (setq windmove-window-distance-delta 2)
|
|
;;
|
|
|
|
;; Acknowledgements:
|
|
;;
|
|
;; Special thanks to Julian Assange (proff@iq.org), whose
|
|
;; change-windows-intuitively.el predates Windmove, and provided the
|
|
;; inspiration for it. Kin Cho (kin@symmetrycomm.com) was the first
|
|
;; to suggest wrap-around behavior. Thanks also to Gerd Moellmann
|
|
;; (gerd@gnu.org) for his comments and suggestions.
|
|
|
|
;;; Code:
|
|
|
|
|
|
;; User configurable variables:
|
|
|
|
;; For customize ...
|
|
(defgroup windmove nil
|
|
"Directional selection of windows in a frame."
|
|
:prefix "windmove-"
|
|
:version "21.1"
|
|
:group 'windows
|
|
:group 'convenience)
|
|
|
|
|
|
(defcustom windmove-wrap-around nil
|
|
"Whether movement off the edge of the frame wraps around.
|
|
If this variable is set to t, moving left from the leftmost window in
|
|
a frame will find the rightmost one, and similarly for the other
|
|
directions. The minibuffer is skipped over in up/down movements if it
|
|
is inactive."
|
|
:type 'boolean
|
|
:group 'windmove)
|
|
|
|
;; If your Emacs sometimes places an empty column between two adjacent
|
|
;; windows, you may wish to set this delta to 2.
|
|
(defcustom windmove-window-distance-delta 1
|
|
"How far away from the current window to look for an adjacent window.
|
|
Measured in characters either horizontally or vertically; setting this
|
|
to a value larger than 1 may be useful in getting around window-
|
|
placement bugs in old versions of Emacs."
|
|
:type 'number
|
|
:group 'windmove)
|
|
|
|
|
|
|
|
;; Implementation overview:
|
|
;;
|
|
;; The conceptual framework behind this code is all fairly simple. We
|
|
;; are on one window; we wish to move to another. The correct window
|
|
;; to move to is determined by the position of point in the current
|
|
;; window as well as the overall window setup.
|
|
;;
|
|
;; Early on, I made the decision to base my implementation around the
|
|
;; built-in function `window-at'. This function takes a frame-based
|
|
;; coordinate, and returns the window that contains it. Using this
|
|
;; function, the job of the various top-level windmove functions can
|
|
;; be decomposed: first, find the current frame-based location of
|
|
;; point; second, manipulate it in some way to give a new location,
|
|
;; that hopefully falls in the window immediately at left (or right,
|
|
;; etc.); third, use `window-at' and `select-window' to select the
|
|
;; window at that new location.
|
|
;;
|
|
;; This is probably not the only possible architecture, and it turns
|
|
;; out to have some inherent cruftiness. (Well, okay, the third step
|
|
;; is pretty clean....) We will consider each step in turn.
|
|
;;
|
|
;; A quick digression about coordinate frames: most of the functions
|
|
;; in the windmove package deal with screen coordinates in one way or
|
|
;; another. These coordinates are always relative to some reference
|
|
;; points. Window-based coordinates have their reference point in the
|
|
;; upper-left-hand corner of whatever window is being talked about;
|
|
;; frame-based coordinates have their reference point in the
|
|
;; upper-left-hand corner of the entire frame (of which the current
|
|
;; window is a component).
|
|
;;
|
|
;; All coordinates are zero-based, which simply means that the
|
|
;; reference point (whatever it is) is assigned the value (x=0, y=0).
|
|
;; X-coordinates grow down the screen, and Y-coordinates grow towards
|
|
;; the right of the screen.
|
|
;;
|
|
;; Okay, back to work. The first step is to gather information about
|
|
;; the frame-based coordinates of point, or rather, the reference
|
|
;; location. The reference location can be point, or the upper-left,
|
|
;; or the lower-right corner of the window; the particular one used is
|
|
;; controlled by the prefix argument to `windmove-left' and all the
|
|
;; rest.
|
|
;;
|
|
;; This work is done by `windmove-reference-loc'. It can figure out
|
|
;; the locations of the corners by calling `window-edges' combined
|
|
;; with the result of `posn-at-point'.
|
|
;;
|
|
;; The second step is more messy. Conceptually, it is fairly simple:
|
|
;; if we know the reference location, and the coordinates of the
|
|
;; current window, we can "throw" our reference point just over the
|
|
;; appropriate edge of the window, and see what other window is
|
|
;; there. More explicitly, consider this example from the user
|
|
;; documentation above.
|
|
;;
|
|
;; -------------
|
|
;; | | A |
|
|
;; | | |
|
|
;; | |-----
|
|
;; | * | | (* is point in the currently
|
|
;; | | B | selected window)
|
|
;; | | |
|
|
;; -------------
|
|
;;
|
|
;; The asterisk marks the reference point; we wish to move right.
|
|
;; Since we are moving horizontally, the Y coordinate of the new
|
|
;; location will be the same. The X coordinate can be such that it is
|
|
;; just past the edge of the present window. Obviously, the new point
|
|
;; will be inside window B. This in itself is fairly simple: using
|
|
;; the result of `windmove-reference-loc' and `window-edges', all the
|
|
;; necessary math can be performed. (Having said that, there is a
|
|
;; good deal of room for off-by-one errors, and Emacs 19.34, at least,
|
|
;; sometimes manifests a bug where two windows don't actually touch,
|
|
;; so a larger skip is required.) The actual math here is done by
|
|
;; `windmove-other-window-loc'.
|
|
;;
|
|
;; But we can't just pass the result of `windmove-other-window-loc' to
|
|
;; `window-at' directly. Why not? Suppose a move would take us off
|
|
;; the edge of the screen, say to the left. We want to give a
|
|
;; descriptive error message to the user. Or, suppose that a move
|
|
;; would place us in the minibuffer. What if the minibuffer is
|
|
;; inactive?
|
|
;;
|
|
;; Actually, the whole subject of the minibuffer edge of the frame is
|
|
;; rather messy. It turns out that with a sufficiently large delta,
|
|
;; we can fly off the bottom edge of the frame and miss the minibuffer
|
|
;; altogther. This, I think, is never right: if there's a minibuffer
|
|
;; and you're not in it, and you move down, the minibuffer should be
|
|
;; in your way.
|
|
;;
|
|
;; (By the way, I'm not totally sure that the code does the right
|
|
;; thing in really weird cases, like a frame with no minibuffer.)
|
|
;;
|
|
;; So, what we need is some ways to do constraining and such. The
|
|
;; early versions of windmove took a fairly simplistic approach to all
|
|
;; this. When I added the wrap-around option, those internals had to
|
|
;; be rewritten. After a *lot* of futzing around, I came up with a
|
|
;; two-step process that I think is general enough to cover the
|
|
;; relevant cases. (I'm not totally happy with having to pass the
|
|
;; window variable as deep as I do, but we can't have everything.)
|
|
;;
|
|
;; In the first phase, we make sure that the new location is sane.
|
|
;; "Sane" means that we can only fall of the edge of the frame in the
|
|
;; direction we're moving in, and that we don't miss the minibuffer if
|
|
;; we're moving down and not already in the minibuffer. The function
|
|
;; `windmove-constrain-loc-for-movement' takes care of all this.
|
|
;;
|
|
;; Then, we handle the wraparound, if it's enabled. The function
|
|
;; `windmove-wrap-loc-for-movement' takes coordinate values (both X
|
|
;; and Y) that fall off the edge of the frame, and replaces them with
|
|
;; values on the other side of the frame. It also has special
|
|
;; minibuffer-handling code again, because we want to wrap through the
|
|
;; minibuffer if it's not enabled.
|
|
;;
|
|
;; So, that's it. Seems to work. All of this work is done by the fun
|
|
;; function `windmove-find-other-window'.
|
|
;;
|
|
;; So, now we have a window to move to (or nil if something's gone
|
|
;; wrong). The function `windmove-do-window-select' is the main
|
|
;; driver function: it actually does the `select-window'. It is
|
|
;; called by four little convenience wrappers, `windmove-left',
|
|
;; `windmove-up', `windmove-right', and `windmove-down', which make
|
|
;; for convenient keybinding.
|
|
|
|
|
|
;; Quick & dirty utility function to add two (x . y) coords.
|
|
(defun windmove-coord-add (coord1 coord2)
|
|
"Add the two coordinates.
|
|
Both COORD1 and COORD2 are coordinate cons pairs, (HPOS . VPOS). The
|
|
result is another coordinate cons pair."
|
|
(cons (+ (car coord1) (car coord2))
|
|
(+ (cdr coord1) (cdr coord2))))
|
|
|
|
|
|
(defun windmove-constrain-to-range (n min-n max-n)
|
|
"Ensure that N is between MIN-N and MAX-N inclusive by constraining.
|
|
If N is less than MIN-N, return MIN-N; if greater than MAX-N, return
|
|
MAX-N."
|
|
(max min-n (min n max-n)))
|
|
|
|
(defun windmove-constrain-around-range (n min-n max-n)
|
|
"Ensure that N is between MIN-N and MAX-N inclusive by wrapping.
|
|
If N is less than MIN-N, return MAX-N; if greater than MAX-N, return
|
|
MIN-N."
|
|
(cond
|
|
((< n min-n) max-n)
|
|
((> n max-n) min-n)
|
|
(t n)))
|
|
|
|
(defun windmove-frame-edges (window)
|
|
"Return (X-MIN Y-MIN X-MAX Y-MAX) for the frame containing WINDOW.
|
|
If WINDOW is nil, return the edges for the selected frame.
|
|
\(X-MIN, Y-MIN) is the zero-based coordinate of the top-left corner
|
|
of the frame; (X-MAX, Y-MAX) is the zero-based coordinate of the
|
|
bottom-right corner of the frame.
|
|
For example, if a frame has 76 rows and 181 columns, the return value
|
|
from `windmove-frame-edges' will be the list (0 0 180 75)."
|
|
(let* ((frame (if window
|
|
(window-frame window)
|
|
(selected-frame)))
|
|
(top-left (window-edges (frame-first-window frame)))
|
|
(x-min (nth 0 top-left))
|
|
(y-min (nth 1 top-left))
|
|
(x-max (1- (frame-width frame))) ; 1- for last row & col
|
|
(y-max (1- (frame-height frame))))
|
|
(list x-min y-min x-max y-max)))
|
|
|
|
;; it turns out that constraining is always a good thing, even when
|
|
;; wrapping is going to happen. this is because:
|
|
;; first, since we disallow exotic diagonal-around-a-corner type
|
|
;; movements, so we can always fix the unimportant direction (the one
|
|
;; we're not moving in).
|
|
;; second, if we're moving down and we're not in the minibuffer, then
|
|
;; constraining the y coordinate to max-y is okay, because if that
|
|
;; falls in the minibuffer and the minibuffer isn't active, that y
|
|
;; coordinate will still be off the bottom of the frame as the
|
|
;; wrapping function sees it and so will get wrapped around anyway.
|
|
(defun windmove-constrain-loc-for-movement (coord window dir)
|
|
"Constrain COORD so that it is reasonable for the given movement.
|
|
This involves two things: first, make sure that the \"off\" coordinate
|
|
-- the one not being moved on, e.g., y for horizontal movement -- is
|
|
within frame boundaries; second, if the movement is down and we're not
|
|
moving from the minibuffer, make sure that the y coordinate does not
|
|
exceed the frame max-y, so that we don't overshoot the minibuffer
|
|
accidentally. WINDOW is the window that movement is relative to; DIR
|
|
is the direction of the movement, one of `left', `up', `right',
|
|
or `down'.
|
|
Returns the constrained coordinate."
|
|
(let ((frame-edges (windmove-frame-edges window))
|
|
(in-minibuffer (window-minibuffer-p window)))
|
|
(let ((min-x (nth 0 frame-edges))
|
|
(min-y (nth 1 frame-edges))
|
|
(max-x (nth 2 frame-edges))
|
|
(max-y (nth 3 frame-edges)))
|
|
(let ((new-x
|
|
(if (memq dir '(up down)) ; vertical movement
|
|
(windmove-constrain-to-range (car coord) min-x max-x)
|
|
(car coord)))
|
|
(new-y
|
|
(if (or (memq dir '(left right)) ; horizontal movement
|
|
(and (eq dir 'down)
|
|
(not in-minibuffer))) ; don't miss minibuffer
|
|
;; (technically, we shouldn't constrain on min-y in the
|
|
;; second case, but this shouldn't do any harm on a
|
|
;; down movement.)
|
|
(windmove-constrain-to-range (cdr coord) min-y max-y)
|
|
(cdr coord))))
|
|
(cons new-x new-y)))))
|
|
|
|
;; having constrained in the limited sense of windmove-constrain-loc-
|
|
;; for-movement, the wrapping code is actually much simpler than it
|
|
;; otherwise would be. the only complication is that we need to check
|
|
;; if the minibuffer is active, and, if not, pretend that it's not
|
|
;; even part of the frame.
|
|
(defun windmove-wrap-loc-for-movement (coord window dir)
|
|
"Takes the constrained COORD and wraps it around for the movement.
|
|
This makes an out-of-range x or y coordinate and wraps it around the
|
|
frame, giving a coordinate (hopefully) in the window on the other edge
|
|
of the frame. WINDOW is the window that movement is relative to (nil
|
|
means the currently selected window); DIR is the direction of the
|
|
movement, one of `left', `up', `right',or `down'.
|
|
Returns the wrapped coordinate."
|
|
(let* ((frame-edges (windmove-frame-edges window))
|
|
(frame-minibuffer (minibuffer-window (if window
|
|
(window-frame window)
|
|
(selected-frame))))
|
|
(minibuffer-active (minibuffer-window-active-p
|
|
frame-minibuffer)))
|
|
(let ((min-x (nth 0 frame-edges))
|
|
(min-y (nth 1 frame-edges))
|
|
(max-x (nth 2 frame-edges))
|
|
(max-y (if (not minibuffer-active)
|
|
(- (nth 3 frame-edges)
|
|
(window-height frame-minibuffer))
|
|
(nth 3 frame-edges))))
|
|
(cons
|
|
(windmove-constrain-around-range (car coord) min-x max-x)
|
|
(windmove-constrain-around-range (cdr coord) min-y max-y)))))
|
|
|
|
|
|
;; This calculates the reference location in the current window: the
|
|
;; frame-based (x . y) of either point, the top-left, or the
|
|
;; bottom-right of the window, depending on ARG.
|
|
(defun windmove-reference-loc (&optional arg window)
|
|
"Return the reference location for directional window selection.
|
|
Return a coordinate (HPOS . VPOS) that is frame-based. If ARG is nil
|
|
or not supplied, the reference point is the buffer's point in the
|
|
currently-selected window, or WINDOW if supplied; otherwise, it is the
|
|
top-left or bottom-right corner of the selected window, or WINDOW if
|
|
supplied, if ARG is greater or smaller than zero, respectively."
|
|
(let ((effective-arg (if (null arg) 0 (prefix-numeric-value arg)))
|
|
(edges (window-inside-edges window)))
|
|
(let ((top-left (cons (nth 0 edges)
|
|
(nth 1 edges)))
|
|
;; Subtracting 1 converts the edge to the last column or line
|
|
;; within the window.
|
|
(bottom-right (cons (- (nth 2 edges) 1)
|
|
(- (nth 3 edges) 1))))
|
|
(cond
|
|
((> effective-arg 0)
|
|
top-left)
|
|
((< effective-arg 0)
|
|
bottom-right)
|
|
((= effective-arg 0)
|
|
(windmove-coord-add
|
|
top-left
|
|
(let ((col-row
|
|
(posn-col-row
|
|
(posn-at-point (window-point window) window))))
|
|
(cons (- (car col-row) (window-hscroll window))
|
|
(cdr col-row)))))))))
|
|
|
|
;; This uses the reference location in the current window (calculated
|
|
;; by `windmove-reference-loc' above) to find a reference location
|
|
;; that will hopefully be in the window we want to move to.
|
|
(defun windmove-other-window-loc (dir &optional arg window)
|
|
"Return a location in the window to be moved to.
|
|
Return value is a frame-based (HPOS . VPOS) value that should be moved
|
|
to. DIR is one of `left', `up', `right', or `down'; an optional ARG
|
|
is handled as by `windmove-reference-loc'; WINDOW is the window that
|
|
movement is relative to."
|
|
(let ((edges (window-edges window)) ; edges: (x0, y0, x1, y1)
|
|
(refpoint (windmove-reference-loc arg window))) ; (x . y)
|
|
(cond
|
|
((eq dir 'left)
|
|
(cons (- (nth 0 edges)
|
|
windmove-window-distance-delta)
|
|
(cdr refpoint))) ; (x0-d, y)
|
|
((eq dir 'up)
|
|
(cons (car refpoint)
|
|
(- (nth 1 edges)
|
|
windmove-window-distance-delta))) ; (x, y0-d)
|
|
((eq dir 'right)
|
|
(cons (+ (1- (nth 2 edges)) ; -1 to get actual max x
|
|
windmove-window-distance-delta)
|
|
(cdr refpoint))) ; (x1+d-1, y)
|
|
((eq dir 'down) ; -1 to get actual max y
|
|
(cons (car refpoint)
|
|
(+ (1- (nth 3 edges))
|
|
windmove-window-distance-delta))) ; (x, y1+d-1)
|
|
(t (error "Invalid direction of movement: %s" dir)))))
|
|
|
|
(defun windmove-find-other-window (dir &optional arg window)
|
|
"Return the window object in direction DIR.
|
|
DIR, ARG, and WINDOW are handled as by `windmove-other-window-loc'."
|
|
(let* ((actual-current-window (or window (selected-window)))
|
|
(raw-other-window-loc
|
|
(windmove-other-window-loc dir arg actual-current-window))
|
|
(constrained-other-window-loc
|
|
(windmove-constrain-loc-for-movement raw-other-window-loc
|
|
actual-current-window
|
|
dir))
|
|
(other-window-loc
|
|
(if windmove-wrap-around
|
|
(windmove-wrap-loc-for-movement constrained-other-window-loc
|
|
actual-current-window
|
|
dir)
|
|
constrained-other-window-loc)))
|
|
(window-at (car other-window-loc)
|
|
(cdr other-window-loc))))
|
|
|
|
|
|
;; Selects the window that's hopefully at the location returned by
|
|
;; `windmove-other-window-loc', or screams if there's no window there.
|
|
(defun windmove-do-window-select (dir &optional arg window)
|
|
"Move to the window at direction DIR.
|
|
DIR, ARG, and WINDOW are handled as by `windmove-other-window-loc'.
|
|
If no window is at direction DIR, an error is signaled."
|
|
(let ((other-window (windmove-find-other-window dir arg window)))
|
|
(cond ((null other-window)
|
|
(error "No window %s from selected window" dir))
|
|
((and (window-minibuffer-p other-window)
|
|
(not (minibuffer-window-active-p other-window)))
|
|
(error "Minibuffer is inactive"))
|
|
(t
|
|
(select-window other-window)))))
|
|
|
|
|
|
;;; end-user functions
|
|
;; these are all simple interactive wrappers to `windmove-do-
|
|
;; window-select', meant to be bound to keys.
|
|
|
|
;;;###autoload
|
|
(defun windmove-left (&optional arg)
|
|
"Select the window to the left of the current one.
|
|
With no prefix argument, or with prefix argument equal to zero,
|
|
\"left\" is relative to the position of point in the window; otherwise
|
|
it is relative to the top edge (for positive ARG) or the bottom edge
|
|
\(for negative ARG) of the current window.
|
|
If no window is at the desired location, an error is signaled."
|
|
(interactive "P")
|
|
(windmove-do-window-select 'left arg))
|
|
|
|
;;;###autoload
|
|
(defun windmove-up (&optional arg)
|
|
"Select the window above the current one.
|
|
With no prefix argument, or with prefix argument equal to zero, \"up\"
|
|
is relative to the position of point in the window; otherwise it is
|
|
relative to the left edge (for positive ARG) or the right edge (for
|
|
negative ARG) of the current window.
|
|
If no window is at the desired location, an error is signaled."
|
|
(interactive "P")
|
|
(windmove-do-window-select 'up arg))
|
|
|
|
;;;###autoload
|
|
(defun windmove-right (&optional arg)
|
|
"Select the window to the right of the current one.
|
|
With no prefix argument, or with prefix argument equal to zero,
|
|
\"right\" is relative to the position of point in the window;
|
|
otherwise it is relative to the top edge (for positive ARG) or the
|
|
bottom edge (for negative ARG) of the current window.
|
|
If no window is at the desired location, an error is signaled."
|
|
(interactive "P")
|
|
(windmove-do-window-select 'right arg))
|
|
|
|
;;;###autoload
|
|
(defun windmove-down (&optional arg)
|
|
"Select the window below the current one.
|
|
With no prefix argument, or with prefix argument equal to zero,
|
|
\"down\" is relative to the position of point in the window; otherwise
|
|
it is relative to the left edge (for positive ARG) or the right edge
|
|
\(for negative ARG) of the current window.
|
|
If no window is at the desired location, an error is signaled."
|
|
(interactive "P")
|
|
(windmove-do-window-select 'down arg))
|
|
|
|
|
|
;;; set up keybindings
|
|
;; Idea for this function is from iswitchb.el, by Stephen Eglen
|
|
;; (stephen@cns.ed.ac.uk).
|
|
;; I don't think these bindings will work on non-X terminals; you
|
|
;; probably want to use different bindings in that case.
|
|
|
|
;;;###autoload
|
|
(defun windmove-default-keybindings (&optional modifier)
|
|
"Set up keybindings for `windmove'.
|
|
Keybindings are of the form MODIFIER-{left,right,up,down}.
|
|
Default MODIFIER is 'shift."
|
|
(interactive)
|
|
(unless modifier (setq modifier 'shift))
|
|
(global-set-key (vector (list modifier 'left)) 'windmove-left)
|
|
(global-set-key (vector (list modifier 'right)) 'windmove-right)
|
|
(global-set-key (vector (list modifier 'up)) 'windmove-up)
|
|
(global-set-key (vector (list modifier 'down)) 'windmove-down))
|
|
|
|
|
|
(provide 'windmove)
|
|
|
|
;;; arch-tag: 56267432-bf1a-4296-a9a0-85c6bd9f2375
|
|
;;; windmove.el ends here
|