emacs - por - Cómo interceptar un archivo antes de que se abra y decidir qué marco

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Question

Estoy buscando algunas ideas, por favor, sobre cómo interceptar un archivo antes de que se abra y tomar una decisión que marco para abrirlo.

Tengo una versión modificada de frame-bufs por Alp Aker - https://github.com/alpaker/Frame-Bufs - que está trabajando con una versión actual de Emacs Trunk. Escribí una función que asocia el archivo que se abre con el marco que tiene foco. Me gustaría dar un paso más y configurar una lista de file types de file types y buffer names que siempre estarán asociados con un marco en particular. Estaba pensando en una función que hace algo como esto:

* If the file being opened is
(or (eq major-mode ''text-mode) (eq major-mode ''latex-mode) )
(switch-to-frame "TEXT")
* If the buffer being opened is
(or (equal (buffer-name) "Folder") (equal (buffer-name) "Summary") )
(switch-to-frame "WANDERLUST")
* After completing either of the above, open the file / buffer.
* Run the custom frame association function -- (associate-current-buffer)

Supongo que es posible averiguar qué modo es un archivo antes de que realmente se abra en un marco. Cuál sería la mejor forma de hacer esto?

Answer 1

;; To try out this example, copy and paste the entire contents of everything
;; in this answer to the `*scratch*'' buffer and type: M-x eval-buffer RET
;; Then type: M-x db-example RET
;;
;; `db-open-file'' also works out-of-the-box by typing: M-x db-open-file RET
;;
;;
;; The frame names are defined with the variable `db-frame-name''.
;; The preconfigured frame names are: SYSTEM, MAIN, ORG, MISCELLANEOUS.
;;
;; Buffers are displayed in specific frames based on the `buffer-name''.
;;
;; If the `buffer-name'' matches a regexp defined `db-special-buffer'',
;; then display that buffer in the current frame.
;;
;; If the `buffer-name'' matches a regexp defined by `db-system-buffer'',
;; then display that buffer in a frame named SYSTEM.
;;
;; If the `buffer-name'' matches a regexp defined by `db-main-buffer'',
;; then display that buffer in a frame named MAIN.
;;
;; If the `buffer-name'' matches a regexp defined by `db-org-buffer'',
;; then display that buffer in a frame named ORG.
;;
;; If the `buffer-name'' does not match any of the above-mentioned regexp,
;; then display that buffer in a frame named MISCELLANEOUS.
;;
;;
;; The following are a few methods of setting the `display-buffer-alist'':
;;
;; (1) Set the `display-buffer-alist'' explicitly with `setq'':
;;
;; (setq display-buffer-alist ''((".*" . (db-pop-up-frame))))
;;
;; (2) Add to an existing `display-buffer-alist'' using `add-to-list'':
;;
;; (add-to-list ''display-buffer-alist ''(".*" . (db-pop-up-frame)))
;;
;; (3) Call the function as part of the `display-buffer'' statement:
;;
;; (display-buffer (get-buffer-create "foo") ''(db-pop-up-frame))
;;
;; (4) Use the `display-buffer-alist'' on a let-bound basis:
;;
;; (let ((display-buffer-alist ''((".*" . (db-pop-up-frame)))))
;; [any additional code] )
(defvar db-frame-name "^//(?:SYSTEM//|MAIN//|ORG//|MISCELLANEOUS//)$"
"Frame names that are used to help organize buffers.")
(defvar db-system-buffer ''("//*scratch//*" "//*bbdb//*" "//*bar//*")
"Regexp of file / buffer names displayed in frame `SYSTEM`.")
(defvar db-main-buffer
''("//.txt" "//.tex" "//.el" "//.yasnippet" "//*foo//*")
"Regexp of file / buffer names displayed in frame `MAIN`.")
(defvar db-org-buffer
''("//*TODO//*" "//*Org Agenda//*" "//.org_archive" "//.org")
"Regexp of file / buffer names displayed in frame `ORG`.")
(defvar db-special-buffer
''("//*special//*" "//*baz//*")
"Regexp of file / buffer names that will display in current frame.")
(defun db-pop-up-frame (buffer alist)
(cond
;; condition # 1 -- either file-visiting or no-file buffers
((db-regexp-match-p db-org-buffer (buffer-name buffer))
(if (db-get-frame--drew-adams "ORG")
(select-frame-set-input-focus (db-get-frame--drew-adams "ORG"))
;; If unnamed frame exists, then take control of it.
(catch ''break (dolist (frame (frame-list))
(if (not (string-match db-frame-name
(frame-parameter frame ''name)))
(throw ''break (progn
(select-frame-set-input-focus
(db-get-frame--drew-adams (frame-parameter frame ''name)))
(set-frame-name "ORG"))))))
;; If dolist found no unnamed frame, then create / name it.
(when (not (db-get-frame--drew-adams "ORG"))
(make-frame (list ''(name . "ORG")))) )
(unless (get-buffer-window buffer)
(set-window-buffer (get-largest-window) buffer))
(select-window (get-buffer-window buffer)) )
;; condition # 2 -- either file-visiting or no-file buffers
((db-regexp-match-p db-main-buffer (buffer-name buffer))
(if (db-get-frame--drew-adams "MAIN")
(select-frame-set-input-focus (db-get-frame--drew-adams "MAIN"))
;; If unnamed frame exists, then take control of it.
(catch ''break (dolist (frame (frame-list))
(if (not (string-match db-frame-name
(frame-parameter frame ''name)))
(throw ''break (progn
(select-frame-set-input-focus
(db-get-frame--drew-adams (frame-parameter frame ''name)))
(set-frame-name "MAIN"))))))
;; If dolist found no unnamed frame, then create / name it.
(when (not (db-get-frame--drew-adams "MAIN"))
(make-frame (list ''(name . "MAIN")))) )
(unless (get-buffer-window buffer)
(set-window-buffer (get-largest-window) buffer))
(select-window (get-buffer-window buffer)) )
;; condition # 3 -- either file-visiting or no-file buffers
((db-regexp-match-p db-system-buffer (buffer-name buffer))
(if (db-get-frame--drew-adams "SYSTEM")
(select-frame-set-input-focus (db-get-frame--drew-adams "SYSTEM"))
;; If unnamed frame exists, then take control of it.
(catch ''break (dolist (frame (frame-list))
(if (not (string-match db-frame-name
(frame-parameter frame ''name)))
(throw ''break (progn
(select-frame-set-input-focus
(db-get-frame--drew-adams (frame-parameter frame ''name)))
(set-frame-name "SYSTEM"))))))
;; If dolist found no unnamed frame, then create / name it.
(when (not (db-get-frame--drew-adams "SYSTEM"))
(make-frame (list ''(name . "SYSTEM")))) )
(unless (get-buffer-window buffer)
(set-window-buffer (get-largest-window) buffer))
(select-window (get-buffer-window buffer)) )
;; condition # 4
;; display buffer in the existing frame
((db-regexp-match-p db-special-buffer (buffer-name buffer))
(unless (get-buffer-window buffer)
(set-window-buffer (get-largest-window) buffer))
(select-window (get-buffer-window buffer)) )
;; condition # 5
;; file-visiting buffers that do NOT match any pre-defined regexp
((and (not (db-regexp-match-p db-org-buffer (buffer-name buffer)))
(not (db-regexp-match-p db-main-buffer (buffer-name buffer)))
(not (db-regexp-match-p db-system-buffer (buffer-name buffer)))
(not (db-regexp-match-p db-special-buffer (buffer-name buffer)))
(buffer-file-name (get-buffer (buffer-name buffer))))
(if (db-get-frame--drew-adams "MISCELLANEOUS")
(select-frame-set-input-focus
(db-get-frame--drew-adams "MISCELLANEOUS"))
;; If unnamed frame exists, then take control of it.
(catch ''break (dolist (frame (frame-list))
(if (not (string-match db-frame-name
(frame-parameter frame ''name)))
(throw ''break (progn
(select-frame-set-input-focus
(db-get-frame--drew-adams (frame-parameter frame ''name)))
(set-frame-name "MISCELLANEOUS"))))))
;; If dolist found no unnamed frame, then create / name it.
(when (not (db-get-frame--drew-adams "MISCELLANEOUS"))
(make-frame (list ''(name . "MISCELLANEOUS")))) )
(unless (get-buffer-window buffer)
(set-window-buffer (get-largest-window) buffer))
(select-window (get-buffer-window buffer)) )
;; condition # 6
;; default display for no-file-visiting buffers
(t nil )))
;; https://github.com/kentaro/auto-save-buffers-enhanced
;; `db-regexp-match-p` function modified by @sds on
;; http://.com/a/20343715/2112489
(defun db-regexp-match-p (regexps string)
(and string
(catch ''matched
(let ((inhibit-changing-match-data t))
(dolist (regexp regexps)
(when (string-match regexp string)
(throw ''matched t)))))))
;; Original Author: Drew Adams -- http://www.emacswiki.org/emacs/frame-fns.el
;; @lawlist combined the functions `get-frame-name` and `get-a-frame`.
(defun db-get-frame--drew-adams (frame)
"Return a frame, if any, named FRAME (a frame or a string).
If none, return nil.
If FRAME is a frame, it is returned."
(let ((get-frame-name--drew-adams
(lambda (&optional frame)
(unless frame (setq frame (selected-frame)))
(if (framep frame)
(cdr (assq ''name (frame-parameters frame)))
(error "Argument not a frame: `%s''" frame)))))
(cond ((framep frame) frame)
((stringp frame)
(catch ''get-a-frame-found
(dolist (fr (frame-list))
(when (string= frame (funcall get-frame-name--drew-adams fr))
(throw ''get-a-frame-found fr)))
nil))
(t
(error "Arg neither a string nor a frame: `%s''" frame)))))
(defun db-open-file (&optional filename)
"With assistance from the `display-buffer-alist'', locate or create a
specific frame, and then open the file."
(interactive)
(let ((display-buffer-alist ''((".*" . (db-pop-up-frame)))))
(display-buffer (find-file-noselect
(if filename
filename
(if (eq system-type ''darwin)
(ns-read-file-name "Select File: " "~/" t nil nil)
(read-file-name "Select File: " "~/" nil nil nil nil) ))))))
(when (eq system-type ''darwin)
(defun db-ns-find-file ()
"Do a `find-file'' with the `ns-input-file'' as argument."
(interactive)
(let* (
(display-buffer-alist ''((".*" . (db-pop-up-frame))))
(f (file-truename (expand-file-name (pop ns-input-file)
command-line-default-directory))) )
(ns-hide-emacs ''activate)
(display-buffer (find-file-noselect f))))
(defalias ''ns-find-file ''db-ns-find-file) )
(defun db-example ()
"This is an example that uses the custom function `db-pop-up-frame'' to
display buffers in different frames or windows depending upon the situation.
The `auto-mode-alist'' is set to `nil` due to a bug in one of the versions
of `org-mode'' where it attempts to recenter a window that is not visible."
(interactive)
;; condition # 3 | file-visiting buffer
(let* (
(auto-mode-alist nil)
(display-buffer-alist ''((".*" . (db-pop-up-frame)))) )
(display-buffer (find-file-noselect "*bar*"))
(set-frame-height (selected-frame) 20)
(set-frame-width (selected-frame) 80)
(set-frame-position (selected-frame) 0 0)
(message "/*bar/* appears in frame name SYSTEM.")
(sit-for 2)
;; condition # 4(a) | no-file-visiting buffer
(display-buffer (get-buffer-create "*default*"))
(message "NO-FILE buffer existing frame.")
(sit-for 2)
;; condition # 2(a) | file-visiting buffer
(display-buffer (find-file-noselect "foo.txt"))
(set-frame-height (selected-frame) 20)
(set-frame-width (selected-frame) 80)
(set-frame-position (selected-frame) 100 100)
(message "/"foo.txt/" appears in frame name MAIN.")
(sit-for 2)
;; condition # 1 | file-visiting buffer
(display-buffer (find-file-noselect "doe.org"))
(set-frame-height (selected-frame) 20)
(set-frame-width (selected-frame) 80)
(set-frame-position (selected-frame) 200 200)
(message "/"doe.org/" appears in frame name ORG.")
(sit-for 2)
;; condition # 4(b) | file-visiting buffer
(display-buffer (find-file-noselect "*special*"))
(message "FILE buffer existing frame.")
(sit-for 2)
;; condition # 6 | no-file-visiting buffer default display
(calendar)
(message "Default for no-file-visiting-buffers.")
(sit-for 2)
;; condition # 5 | file-visiting buffer with no pre-defined regexp.
(display-buffer (find-file-noselect "*undefined*"))
(set-frame-height (selected-frame) 20)
(set-frame-width (selected-frame) 80)
(set-frame-position (selected-frame) 300 300)
(message "/*IS/* buffer-filename. /*NOT/* defined by any particular regexp.")
(sit-for 2)
;; condition # 2(b) | no-file-visiting buffer
(display-buffer (get-buffer-create "*foo*"))
(set-frame-height (selected-frame) 20)
(set-frame-width (selected-frame) 80)
(set-frame-position (selected-frame) 400 400)
(message "/*NOT/* buffer-filename. /*IS/* defined by db-main-buffer.")
(sit-for 2)
(kill-buffer "*foo*")
(kill-buffer "*bar*")
(kill-buffer "*default*")
(kill-buffer "*undefined*")
(kill-buffer "*Calendar*")
(kill-buffer "*special*")
(kill-buffer "foo.txt")
(kill-buffer "doe.org")
(make-frame)
(delete-frame (db-get-frame--drew-adams "SYSTEM"))
(delete-frame (db-get-frame--drew-adams "MAIN"))
(delete-frame (db-get-frame--drew-adams "ORG"))
(delete-frame (db-get-frame--drew-adams "MISCELLANEOUS"))
(message "THE END.")))