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Split default-buffer-default into separate display action components.
* lisp/window.el (display-buffer-alist): Doc fix. (display-buffer): Add docstring. Don't treat display-buffer-default specially. (display-buffer-reuse-selected-window) (display-buffer-same-window, display-buffer-maybe-same-window) (display-buffer-reuse-window, display-buffer-pop-up-frame) (display-buffer-pop-up-window) (display-buffer-reuse-or-pop-window) (display-buffer-use-some-window): New functions. (display-buffer-default-action): Use them. (display-buffer-default): Deleted. (pop-to-buffer-1): Fix choice of actions.
This commit is contained in:
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@ -1,3 +1,18 @@
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2011-09-02 Chong Yidong <cyd@stupidchicken.com>
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* window.el (display-buffer-alist): Doc fix.
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(display-buffer): Add docstring. Don't treat
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display-buffer-default specially.
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(display-buffer-reuse-selected-window)
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(display-buffer-same-window, display-buffer-maybe-same-window)
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(display-buffer-reuse-window, display-buffer-pop-up-frame)
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(display-buffer-pop-up-window)
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(display-buffer-reuse-or-pop-window)
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(display-buffer-use-some-window): New functions.
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(display-buffer-default-action): Use them.
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(display-buffer-default): Deleted.
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(pop-to-buffer-1): Fix choice of actions.
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2011-09-02 Stefan Monnier <monnier@iro.umontreal.ca>
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* minibuffer.el (completion--insert-strings): Don't get confused by
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508
lisp/window.el
508
lisp/window.el
@ -4478,155 +4478,6 @@ Return WINDOW."
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The actual non-nil value of this variable will be copied to the
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`window-dedicated-p' flag.")
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(defun display-buffer-default (buffer-or-name &optional not-this-window frame)
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"Make buffer BUFFER-OR-NAME appear in some window but don't select it.
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BUFFER-OR-NAME must be a buffer or the name of an existing
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buffer. Return the window chosen to display BUFFER-OR-NAME or
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nil if no such window is found.
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Optional argument NOT-THIS-WINDOW non-nil means display the
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buffer in a window other than the selected one, even if it is
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already displayed in the selected window.
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Optional argument FRAME specifies which frames to investigate
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when the specified buffer is already displayed. If the buffer is
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already displayed in some window on one of these frames simply
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return that window. Possible values of FRAME are:
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`visible' - consider windows on all visible frames on the current
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terminal.
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0 - consider windows on all visible or iconified frames on the
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current terminal.
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t - consider windows on all frames.
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A specific frame - consider windows on that frame only.
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nil - consider windows on the selected frame \(actually the
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last non-minibuffer frame\) only. If, however, either
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`display-buffer-reuse-frames' or `pop-up-frames' is non-nil
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\(non-nil and not graphic-only on a text-only terminal),
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consider all visible or iconified frames on the current terminal."
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(interactive "BDisplay buffer:\nP")
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(let* ((can-use-selected-window
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;; The selected window is usable unless either NOT-THIS-WINDOW
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;; is non-nil, it is dedicated to its buffer, or it is the
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;; `minibuffer-window'.
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(not (or not-this-window
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(window-dedicated-p (selected-window))
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(window-minibuffer-p))))
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(buffer (if (bufferp buffer-or-name)
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buffer-or-name
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(get-buffer buffer-or-name)))
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(name-of-buffer (buffer-name buffer))
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;; On text-only terminals do not pop up a new frame when
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;; `pop-up-frames' equals graphic-only.
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(use-pop-up-frames (if (eq pop-up-frames 'graphic-only)
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(display-graphic-p)
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pop-up-frames))
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;; `frame-to-use' is the frame where to show `buffer' - either
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;; the selected frame or the last nonminibuffer frame.
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(frame-to-use
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(or (window--frame-usable-p (selected-frame))
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(window--frame-usable-p (last-nonminibuffer-frame))))
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;; `window-to-use' is the window we use for showing `buffer'.
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window-to-use popped-up-frame)
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(cond
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((not (buffer-live-p buffer))
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(error "No such buffer %s" buffer))
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(display-buffer-function
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;; Let `display-buffer-function' do the job.
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(funcall display-buffer-function buffer not-this-window))
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((and (not not-this-window)
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(eq (window-buffer (selected-window)) buffer))
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;; The selected window already displays BUFFER and
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;; `not-this-window' is nil, so use it.
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(display-buffer-record-window 'reuse-window (selected-window) buffer)
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(window--display-buffer-1 (selected-window)))
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((and can-use-selected-window (same-window-p name-of-buffer))
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;; If the buffer's name tells us to use the selected window do so.
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(display-buffer-record-window 'reuse-window (selected-window) buffer)
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(window--display-buffer-2 buffer (selected-window)))
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((let ((frames (or frame
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(and (or use-pop-up-frames
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display-buffer-reuse-frames
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(not (last-nonminibuffer-frame)))
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0)
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(last-nonminibuffer-frame))))
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(setq window-to-use
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(catch 'found
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;; Search frames for a window displaying BUFFER. Return
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;; the selected window only if we are allowed to do so.
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(dolist (window (get-buffer-window-list buffer 'nomini frames))
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(when (or can-use-selected-window
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(not (eq (selected-window) window)))
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(throw 'found window))))))
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;; The buffer is already displayed in some window; use that.
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(display-buffer-record-window 'reuse-window window-to-use buffer)
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(window--display-buffer-1 window-to-use))
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((and special-display-function
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;; `special-display-p' returns either t or a list of frame
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;; parameters to pass to `special-display-function'.
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(let ((pars (special-display-p name-of-buffer)))
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(when pars
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(funcall special-display-function
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buffer (if (listp pars) pars))))))
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((or use-pop-up-frames (not frame-to-use))
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;; We want or need a new frame.
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(setq window-to-use
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(frame-selected-window (funcall pop-up-frame-function)))
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(display-buffer-record-window 'pop-up-frame window-to-use buffer)
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(window--display-buffer-2 buffer window-to-use))
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((and pop-up-windows
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;; Make a new window.
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(or (not (frame-parameter frame-to-use 'unsplittable))
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;; If the selected frame cannot be split look at
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;; `last-nonminibuffer-frame'.
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(and (eq frame-to-use (selected-frame))
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(setq frame-to-use (last-nonminibuffer-frame))
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(window--frame-usable-p frame-to-use)
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(not (frame-parameter frame-to-use 'unsplittable))))
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;; Attempt to split largest or least recently used window.
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(setq window-to-use
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(or (window--try-to-split-window
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(get-largest-window frame-to-use t))
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(window--try-to-split-window
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(get-lru-window frame-to-use t))))
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(display-buffer-record-window 'pop-up-window window-to-use buffer)
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(window--display-buffer-2 buffer window-to-use)))
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((let ((window-to-undedicate
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;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate
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;; the selected window to its buffer, to avoid that some of
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;; the `get-' routines below choose it. (Bug#1415)
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(and not-this-window (not (window-dedicated-p))
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(set-window-dedicated-p (selected-window) t)
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(selected-window))))
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(unwind-protect
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(setq window-to-use
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;; Reuse an existing window.
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(or (get-lru-window frame-to-use)
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(let ((window (get-buffer-window buffer 'visible)))
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(unless (and not-this-window
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(eq window (selected-window)))
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window))
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(get-largest-window 'visible)
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(let ((window (get-buffer-window buffer 0)))
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(unless (and not-this-window
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(eq window (selected-window)))
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window))
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(get-largest-window 0)
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(prog1
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(frame-selected-window (funcall pop-up-frame-function))
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(setq popped-up-frame t))))
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(when (window-live-p window-to-undedicate)
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;; Restore dedicated status of selected window.
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(set-window-dedicated-p window-to-undedicate nil))))
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(display-buffer-record-window
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(if popped-up-frame 'pop-up-frame 'reuse-window) window-to-use buffer)
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(window--even-window-heights window-to-use)
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(window--display-buffer-2 buffer window-to-use)))))
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(defun window-normalize-buffer-to-display (buffer-or-name)
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"Normalize BUFFER-OR-NAME argument for buffer display functions.
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If BUFFER-OR-NAME is nil, return the curent buffer. Else, if a
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@ -4641,24 +4492,52 @@ BUFFER-OR-NAME and return that buffer."
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(current-buffer)))
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(defvar display-buffer-alist nil
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"Specifications of user preferences for `display-buffer'.
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This is a list of elements of the form (CONDITION . ACTION) where
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CONDITION is either a regexp matching buffer names, or a function
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that takes a buffer and returns a boolean. ACTION is a list of
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the form (FUNCTION . ALIST) where FUNCTION can be either a
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function or a list of functions. Those functions will be called
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with 2 arguments: the buffer to display and an ALIST built from
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the various alists specified in the various ACTIONs. It should
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either return the window used, or nil to fallback to the next
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function.")
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"Alist of conditional actions for `display-buffer'.
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This is a list of elements (CONDITION . ACTION), where:
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(defvar display-buffer-default-action (list #'display-buffer-default)
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"Default action to perform to display a buffer.
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This is an ACTION just like in `display-buffer-alist'.")
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CONDITION is either a regexp matching buffer names, or a function
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that takes a buffer and returns a boolean.
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(defvar display-buffer-overriding-action '(nil)
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ACTION is a cons cell (FUNCTION . ALIST), where FUNCTION is
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either a function or a list of functions. Each such function
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should accept 2 arguments: a buffer to display and an alist of
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the same form as ALIST. It should return the window used, or
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nil if it fails to display the window. See `display-buffer'
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for more details.
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Usable action functions include:
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`display-buffer-reuse-selected-window'
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`display-buffer-same-window'
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`display-buffer-maybe-same-window'
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`display-buffer-reuse-window'
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`display-buffer-pop-up-frame'
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`display-buffer-pop-up-window'
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`display-buffer-reuse-or-pop-window'
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`display-buffer-use-some-window'
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The above functions recognize the following alist entries:
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- `inhibit-same-window', if non-nil, prevents the same window
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from being used for display.
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- `reuse-frame' specifies the frames that can be searched for a
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window displaying the buffer. Its values have the same
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meaning as the ALL-FRAMES arg to `get-buffer-window-list'.")
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(defvar display-buffer-default-action
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'((display-buffer-reuse-selected-window
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display-buffer-maybe-same-window
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display-buffer-reuse-or-pop-window
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display-buffer-use-some-window
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;; If all else fails, pop up a new frame regardless of
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;; restrictions.
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display-buffer-pop-up-frame))
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"List of default actions for `display-buffer'.
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It should be a cons cell of the form (FUNCTION . ALIST), which
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has the same meaning as in `display-buffer-alist'.")
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(defvar display-buffer-overriding-action nil
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"Overriding action to perform to display a buffer.
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This is an ACTION just like in `display-buffer-alist'.")
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If non-nil, it should be a cons cell (FUNCTION . ALIST), which
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has the same meaning as in `display-buffer-alist'.")
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(defun display-buffer-assq-regexp (buffer-name alist)
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"Retrieve ALIST entry corresponding to BUFFER-NAME."
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@ -4673,46 +4552,72 @@ This is an ACTION just like in `display-buffer-alist'.")
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(throw 'match (cdr entry)))))))
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(defun display-buffer (&optional buffer-or-name action frame)
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"Display BUFFER in some window."
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(interactive "BDisplay buffer:\nP")
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(let* ((buffer (window-normalize-buffer-to-display buffer-or-name))
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(buffer-name (buffer-name buffer))
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(user-action
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(display-buffer-assq-regexp buffer-name display-buffer-alist))
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(functions
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(append
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(list (car display-buffer-overriding-action))
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(list (car user-action))
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(and (listp action) (list (car action)))
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(list (car display-buffer-default-action))))
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(specifiers (append (cdr display-buffer-overriding-action)
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(cdr user-action)
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(and (listp action) (cdr action))
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(cdr display-buffer-default-action)))
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function window)
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(while (and functions (not window))
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(setq function (car functions))
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(cond
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((listp function)
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(while (and function (not window))
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(cond
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((eq (car function) 'display-buffer-default)
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(setq window
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(display-buffer-default
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buffer (memq action '(t other-window)) frame)))
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((functionp (car function))
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(setq window (funcall (car function) buffer specifiers))))
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(setq function (cdr function))))
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((eq function 'display-buffer-default)
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(setq window
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(display-buffer-default
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buffer (memq action '(t other-window)) frame)))
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((functionp function)
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(setq window
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(funcall function buffer specifiers))))
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(setq functions (cdr functions)))
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"Display BUFFER-OR-NAME in some window.
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BUFFER-OR-NAME must be a buffer or the name of an existing
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buffer. Return the window chosen for displaying BUFFER-OR-NAME,
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or nil if no such window is found.
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window))
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Optional argument ACTION should have the form (FUNCTION . ALIST).
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FUNCTION is either a function or a list of functions. Each such
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function is called with 2 arguments: the buffer to display and an
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alist. It should either display the buffer and return the
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window, or return nil if it is unable to display the buffer.
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`display-buffer' constructs a list of action functions and an
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action alist from `display-buffer-overriding-action',
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`user-action', ACTION, and `display-buffer-default-action' (in
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order). It calls each action function in turn, passing the
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consolidated action alist as the second argument, until one of
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the functions returns non-nil.
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ACTION can also have a non-nil and non-list value. This means to
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display the buffer in a window other than the selected one, even
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if it is already displayed in the selected window. If called
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interactively with a prefix argument, ACTION is t.
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Optional argument FRAME specifies where to look for a window that
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already displays the buffer. If nil, check only the selected
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frame (actually the last non-minibuffer frame), except if
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`display-buffer-reuse-frames' or `pop-up-frames' is non-nil
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\(non-nil and not graphic-only on a text-only terminal), in which
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case check all visible or iconified frames. Otherwise, FRAME can
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be a specific frame, `visible' (all visible frames), 0 (all
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frames on the current terminal), or t (all frames)."
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(interactive "BDisplay buffer:\nP")
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(let ((buffer (window-normalize-buffer-to-display buffer-or-name))
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;; Handle the old form of the first argument.
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(inhibit-same-window (and action (not (listp action)))))
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(unless (listp action) (setq action nil))
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(if display-buffer-function
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;; If `display-buffer-function' is defined, let it do the job.
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(funcall display-buffer-function buffer inhibit-same-window)
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;; Otherwise, use the defined actions.
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(let* ((user-action
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(display-buffer-assq-regexp (buffer-name buffer)
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display-buffer-alist))
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;; Extra actions from the arguments to this function:
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(extra-action
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(cons nil (append (if inhibit-same-window
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'((inhibit-same-window . t)))
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(if frame
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`((reuse-frame . ,frame))))))
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;; Construct action function list and action alist.
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(actions (list display-buffer-overriding-action
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user-action action extra-action
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display-buffer-default-action))
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(functions (apply 'append
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(mapcar (lambda (x)
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(setq x (car x))
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(if (listp x) x (list x)))
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actions)))
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(alist (apply 'append (mapcar 'cdr actions)))
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window)
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(unless (buffer-live-p buffer)
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(error "Invalid buffer"))
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(while (and functions (not window))
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(setq window (funcall (car functions) buffer alist)
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functions (cdr functions)))
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window))))
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(defun display-buffer-other-frame (buffer)
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"Display buffer BUFFER in another frame.
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@ -4737,24 +4642,182 @@ its documentation for additional customization information."
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;;(make-frame-visible (window-frame old-window))
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))
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;;; Functions for use via `display-buffer-alist'.
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;;; `display-buffer' action functions:
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(defun display-buffer-reuse-selected-window (buffer alist)
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"Try to display BUFFER in the selected window if it is already there.
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If this succeeds, return the selected window.
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This fails if BUFFER is not displayed in the selected window, or
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if ALIST has a non-nil `inhibit-same-window' entry. In that
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case, return nil."
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(when (and (not (cdr (assq 'inhibit-same-window alist)))
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(eq buffer (window-buffer)))
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(display-buffer-record-window 'reuse-window (selected-window) buffer)
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(window--display-buffer-1 (selected-window))))
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(defun display-buffer-same-window (buffer alist)
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"Display BUFFER in the selected window, and return the window.
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If BUFFER cannot be displayed in the selected window (usually
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because it is dedicated to another buffer), return nil."
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(let ((norecord (cadr (assq 'norecord alist))))
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(cond
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((eq buffer (window-buffer))
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(selected-window))
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((not (or (window-minibuffer-p) (window-dedicated-p)))
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(set-window-buffer nil buffer)
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(selected-window)))))
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"Try to display BUFFER in the selected window.
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If this succeeds, return the selected window.
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(defun display-buffer-other-window (buffer alist)
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"Display BUFFER in another window, and return BUFFER.
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If BUFFER cannot be displayed in another window, just return nil."
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(display-buffer-default buffer t))
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This fails if the selected window is a minibuffer window or is
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dedicated to another buffer, or if ALIST has a non-nil
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`inhibit-same-window' entry. In that case, return nil."
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(unless (or (cdr (assq 'inhibit-same-window alist))
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(window-minibuffer-p)
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(window-dedicated-p))
|
||||
(display-buffer-record-window 'reuse-window (selected-window) buffer)
|
||||
(window--display-buffer-2 buffer (selected-window))))
|
||||
|
||||
(defun display-buffer-maybe-same-window (buffer alist)
|
||||
"Try to display BUFFER in the selected window.
|
||||
This acts like `display-buffer-same-window', except that it also
|
||||
fails if `same-window-p' returns nil for this buffer."
|
||||
(and (same-window-p (buffer-name buffer))
|
||||
(display-buffer-same-window buffer alist)))
|
||||
|
||||
(defun display-buffer-reuse-window (buffer alist)
|
||||
"Return a window that is already displaying BUFFER.
|
||||
If no usable window is found, return nil.
|
||||
|
||||
If ALIST has a non-nil `inhibit-same-window' entry, the same
|
||||
window cannot be reused.
|
||||
|
||||
If ALIST contains a `reuse-frame' entry, that determines the
|
||||
frames to check for a window displaying the buffer. If the entry
|
||||
is omitted or the value is nil, check only this frame. The value
|
||||
can also be a specific frame, `visible' (all visible frames),
|
||||
0 (all frames on the current terminal), or t (all frames)."
|
||||
(let* ((can-use-selected-window
|
||||
(not (cdr (assq 'inhibit-same-window alist))))
|
||||
(frames (or (cdr (assq 'reuse-frame alist))
|
||||
(last-nonminibuffer-frame)))
|
||||
(window (catch 'found
|
||||
(dolist (window (get-buffer-window-list
|
||||
buffer 'nomini frames))
|
||||
(when (or can-use-selected-window
|
||||
(not (eq (selected-window) window)))
|
||||
(throw 'found window))))))
|
||||
(when window
|
||||
(display-buffer-record-window 'reuse-window window buffer)
|
||||
(window--display-buffer-1 window))))
|
||||
|
||||
(defun display-buffer-pop-up-frame (buffer alist)
|
||||
"Display BUFFER in a new frame.
|
||||
This works by calling `pop-up-frame-function'. If sucessful,
|
||||
return the window on the new frame; otherwise return nil."
|
||||
(let ((fun pop-up-frame-function)
|
||||
frame window)
|
||||
(when (and fun
|
||||
(setq frame (funcall fun))
|
||||
(setq window (frame-selected-window frame)))
|
||||
(display-buffer-record-window 'pop-up-frame window buffer)
|
||||
(window--display-buffer-2 buffer window))))
|
||||
|
||||
(defun display-buffer-pop-up-window (buffer alist)
|
||||
"Display BUFFER by popping up a new window.
|
||||
The new window is created on the selected frame, or in
|
||||
`last-nonminibuffer-frame' if no windows can be created there.
|
||||
If sucessful, return the new window; otherwise return nil."
|
||||
(let ((frame (or (window--frame-usable-p (selected-frame))
|
||||
(window--frame-usable-p (last-nonminibuffer-frame))))
|
||||
window)
|
||||
(when (and (or (not (frame-parameter frame 'unsplittable))
|
||||
;; If the selected frame cannot be split, look at
|
||||
;; `last-nonminibuffer-frame'.
|
||||
(and (eq frame (selected-frame))
|
||||
(setq frame (last-nonminibuffer-frame))
|
||||
(window--frame-usable-p frame)
|
||||
(not (frame-parameter frame 'unsplittable))))
|
||||
;; Attempt to split largest or least recently used window.
|
||||
(setq window (or (window--try-to-split-window
|
||||
(get-largest-window frame t))
|
||||
(window--try-to-split-window
|
||||
(get-lru-window frame t)))))
|
||||
(display-buffer-record-window 'pop-up-window window buffer)
|
||||
(window--display-buffer-2 buffer window))))
|
||||
|
||||
;; This display action function groups together some lower-level ones:
|
||||
(defun display-buffer-reuse-or-pop-window (buffer alist)
|
||||
"Display BUFFER in some window other than the selected one.
|
||||
This attempts to call the following functions (in order):
|
||||
- `display-buffer-reuse-window', ensuring that it checks all
|
||||
frames on this terminal if `display-buffer-reuse-frames' or
|
||||
`pop-up-frames' is non-nil.
|
||||
- `special-display-function', if it is available.
|
||||
- `display-buffer-pop-up-frame', if specified by `pop-up-frames'.
|
||||
- `display-buffer-pop-up-window', if specified by `pop-up-windows'.
|
||||
|
||||
If BUFFER is sucessfully display, return its window; otherwise
|
||||
return nil."
|
||||
(let ((use-pop-up-frames (if (eq pop-up-frames 'graphic-only)
|
||||
(display-graphic-p)
|
||||
pop-up-frames)))
|
||||
(or (display-buffer-reuse-window
|
||||
buffer
|
||||
;; If `display-buffer-reuse-frames' or `pop-up-frames' is
|
||||
;; non-nil, check all frames on this terminal.
|
||||
(if (and (null (cdr (assq 'reuse-frame alist)))
|
||||
(or use-pop-up-frames display-buffer-reuse-frames))
|
||||
(cons '(reuse-frame . 0) alist)
|
||||
alist))
|
||||
;; Try with `special-display-function':
|
||||
(and special-display-function
|
||||
;; `special-display-p' returns either t or a list of frame
|
||||
;; parameters to pass to `special-display-function'.
|
||||
(let ((pars (special-display-p (buffer-name buffer))))
|
||||
(when pars
|
||||
(funcall special-display-function
|
||||
buffer (if (listp pars) pars)))))
|
||||
(and use-pop-up-frames
|
||||
(display-buffer-pop-up-frame buffer alist))
|
||||
(and pop-up-windows
|
||||
(display-buffer-pop-up-window buffer alist)))))
|
||||
|
||||
(defun display-buffer-use-some-window (buffer alist)
|
||||
"Display BUFFER in an existing window.
|
||||
Search for a usable window, set that window to the buffer, and
|
||||
return the window. If no suitable window is found, return nil."
|
||||
(let* ((not-this-window (cdr (assq 'inhibit-same-window alist)))
|
||||
(window-to-undedicate
|
||||
;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate the
|
||||
;; selected window to its buffer, to prevent any of the
|
||||
;; `get-' routines below from choosing it. (Bug#1415)
|
||||
(and not-this-window (not (window-dedicated-p))
|
||||
(set-window-dedicated-p (selected-window) t)
|
||||
(selected-window)))
|
||||
(frame (or (window--frame-usable-p (selected-frame))
|
||||
(window--frame-usable-p (last-nonminibuffer-frame))))
|
||||
(use-pop-up-frames (if (eq pop-up-frames 'graphic-only)
|
||||
(display-graphic-p)
|
||||
pop-up-frames))
|
||||
window popped-up-frame)
|
||||
(unwind-protect
|
||||
(setq window
|
||||
;; Reuse an existing window.
|
||||
(or (get-lru-window frame)
|
||||
(let ((window (get-buffer-window buffer 'visible)))
|
||||
(unless (and not-this-window
|
||||
(eq window (selected-window)))
|
||||
window))
|
||||
(get-largest-window 'visible)
|
||||
(let ((window (get-buffer-window buffer 0)))
|
||||
(unless (and not-this-window
|
||||
(eq window (selected-window)))
|
||||
window))
|
||||
(get-largest-window 0)
|
||||
(and use-pop-up-frames
|
||||
(prog1
|
||||
(frame-selected-window (funcall pop-up-frame-function))
|
||||
(setq popped-up-frame t)))))
|
||||
(when (window-live-p window-to-undedicate)
|
||||
;; Restore dedicated status of selected window.
|
||||
(set-window-dedicated-p window-to-undedicate nil)))
|
||||
(when window
|
||||
(display-buffer-record-window
|
||||
(if popped-up-frame 'pop-up-frame 'reuse-window) window buffer)
|
||||
(window--even-window-heights window)
|
||||
(window--display-buffer-2 buffer window))))
|
||||
|
||||
;;; Display + selection commands:
|
||||
|
||||
@ -4808,12 +4871,11 @@ for `pop-to-buffer'."
|
||||
;; Based on the WINDOW-CHOICE argument, choose an action
|
||||
;; argument to pass to `display-buffer'.
|
||||
(cond
|
||||
((null window-choice)
|
||||
'((display-buffer-other-window display-buffer-same-window)))
|
||||
((eq window-choice 'same-window)
|
||||
'((display-buffer-same-window display-buffer-other-window)))
|
||||
(t
|
||||
'((display-buffer-other-window)))))
|
||||
'((display-buffer-reuse-selected-window
|
||||
display-buffer-same-window)))
|
||||
(window-choice
|
||||
'(nil (inhibit-same-window . t)))))
|
||||
(window (display-buffer (current-buffer) action))
|
||||
(frame (window-frame window)))
|
||||
(if (eq frame old-frame)
|
||||
|
Loading…
Reference in New Issue
Block a user