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1489 lines
55 KiB
EmacsLisp
1489 lines
55 KiB
EmacsLisp
;;; bs.el --- menu for selecting and displaying buffers
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;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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;; Author: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
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;; Maintainer: Olaf Sylvester <Olaf.Sylvester@netsurf.de>
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;; Keywords: convenience
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Version: 1.17
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;; X-URL: http://www.geekware.de/software/emacs
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;;
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;; The bs-package contains a main function bs-show for poping up a
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;; buffer in a way similar to `list-buffers' and `electric-buffer-list':
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;; The new buffer offers a Buffer Selection Menu for manipulating
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;; the buffer list and buffers.
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;;
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;; -----------------------------------------------------------------------
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;; | MR Buffer Size Mode File |
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;; | -- ------ ---- ---- ---- |
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;; |. bs.el 14690 Emacs-Lisp /home/sun/sylvester/el/bs.e$|
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;; | % executable.el 9429 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
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;; | % vc.el 104893 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
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;; | % test_vc.el 486 Emacs-Lisp /home/sun/sylvester/el/test$|
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;; | % vc-hooks.el 43605 Emacs-Lisp /usr/share/emacs/19.34/lisp$|
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;; -----------------------------------------------------------------------
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;;; Quick Installation und Customization:
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;; Use
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;; M-x bs-show
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;; for buffer selection or optional bind a key to main function `bs-show'
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;; (global-set-key "\C-x\C-b" 'bs-show) ;; or another key
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;;
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;; For customization use
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;; M-x bs-customize
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;;; More Commentary:
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;; bs-show will generate a new buffer named *buffer-selection*, which shows
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;; all buffers or a subset of them, and has possibilities for deleting,
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;; saving and selecting buffers. For more details see docstring of
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;; function `bs-mode'. A current configuration describes which buffers appear
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;; in *buffer-selection*. See docstring of variable `bs-configurations' for
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;; more details.
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;;
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;; The package bs combines the advantages of the Emacs functions
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;; `list-buffers' and `electric-buffer-list'.
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;;
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;; Additional features for Buffer Selection Menu:
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;; - configurable list of buffers (show only files etc.).
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;; - comfortable way to change displayed subset of all buffers.
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;; - show sorted list of buffers.
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;; - cyclic navigation:
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;; - goes to top of buffer list if you are on last line and press down.
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;; - goes to end of buffer list if you are on first line and press up.
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;; - Offer an alternative buffer list by prefix key C-u.
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;;; Cycling through buffers
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;; This package offers two functions for buffer cycling. If you want to cycle
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;; through buffer list you can use `bs-cycle-next' or `bs-cycle-previous'.
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;; Bind these function to a key like
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;; (global-set-key [(f9)] 'bs-cycle-previous)
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;; (global-set-key [(f10)] 'bs-cycle-next)
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;;
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;; Both functions use a special subset of all buffers for cycling to avoid
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;; to go through internal buffers like *Messages*.
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;;
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;; Cycling through buffers ignores sorting because sorting destroys
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;; the logical buffer list. If buffer list is sorted by size you
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;; won't be able to cycle to the smallest buffer.
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;;; Customization:
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;; There is a customization group called `bs' in group `convenience'.
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;; Start customization by M-x bs-customize
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;;
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;; Buffer list
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;; -----------
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;; You can define your own configurations by extending variable
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;; `bs-configurations' (see docstring for details).
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;;
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;; `bs-default-configuration' contains the name of default configuration.
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;; The default value is "files" which means to show only files.
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;;
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;; If you always want to see all buffers, customize variable
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;; `bs-default-configuration' in customization group `bs'.
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;;
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;; Configure sorting
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;; -----------------
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;; You can define functions for sorting the buffer list.
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;; When selecting buffers, you can step through available sorting
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;; methods with key 'S'.
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;; To define a new way of sorting, customize variable `bs-sort-functions'.
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;;
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;; There are four basic functions for sorting:
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;; by buffer name, by mode, by size, or by filename
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;;
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;; Configure buffer cycling
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;; ------------------------
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;; When cycling through buffer list the functions for cycling will use
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;; the current configuration of bs to calculate the buffer list.
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;; If you want to use a different configuration for cycling you have to set
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;; the variable `bs-cycle-configuration-name'. You can customize this variable.
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;;
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;; For example: If you use the configuration called "files-and-scratch" you
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;; can cycle through all file buffers and *scratch* although your current
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;; configuration perhaps is "files" which ignores buffer *scratch*.
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;;; History:
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;;; Code:
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(eval-when-compile (require 'cl))
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;; ----------------------------------------------------------------------
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;; Globals for customization
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;; ----------------------------------------------------------------------
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(defgroup bs nil
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"Buffer Selection: Maintaining buffers by buffer menu."
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:version "21.1"
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:link '(emacs-commentary-link "bs")
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:link '(url-link "http://www.geekware.de/software/emacs")
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:group 'convenience)
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(defgroup bs-appearance nil
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"Buffer Selection appearance: Appearance of bs buffer menu."
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:group 'bs)
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(defcustom bs-attributes-list
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'(("" 1 1 left bs--get-marked-string)
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("M" 1 1 left bs--get-modified-string)
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("R" 2 2 left bs--get-readonly-string)
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("Buffer" bs--get-name-length 10 left bs--get-name)
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("" 1 1 left " ")
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("Size" 8 8 right bs--get-size-string)
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("" 1 1 left " ")
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("Mode" 12 12 right bs--get-mode-name)
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("" 2 2 left " ")
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("File" 12 12 left bs--get-file-name)
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("" 2 2 left " "))
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"List specifying the layout of a Buffer Selection Menu buffer.
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Each entry specifies a column and is a list of the form of:
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\(HEADER MINIMUM-LENGTH MAXIMUM-LENGTH ALIGNMENT FUN-OR-STRING)
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HEADER : String for header for first line or a function
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which calculates column title.
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MINIMUM-LENGTH : Minimum width of column (number or name of function).
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The function must return a positive integer.
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MAXIMUM-LENGTH : Maximum width of column (number or name of function)
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(currently ignored).
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ALIGNMENT : Alignment of column (`left', `right', `middle').
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FUN-OR-STRING : Name of a function for calculating the value or a
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string for a constant value.
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The function gets as parameter the buffer where we have started
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buffer selection and the list of all buffers to show. The function must
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return a string representing the column's value."
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:group 'bs-appearance
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:type '(repeat sexp))
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(defun bs--make-header-match-string ()
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"Return a regexp matching the first line of a Buffer Selection Menu buffer."
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(concat "^\\(" (mapconcat #'car bs-attributes-list " *") " *$\\)"))
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;; Font-Lock-Settings
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(defvar bs-mode-font-lock-keywords
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(list ;; header in font-lock-type-face
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(list (bs--make-header-match-string)
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'(1 font-lock-type-face append) '(1 'bold append))
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;; Buffername embedded by *
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(list "^\\(.*\\*.*\\*.*\\)$"
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1
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;; problem in XEmacs with font-lock-constant-face
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(if (facep 'font-lock-constant-face)
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'font-lock-constant-face
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'font-lock-comment-face))
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;; Dired-Buffers
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'("^..\\(.*Dired by .*\\)$" 1 font-lock-function-name-face)
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;; the star for modified buffers
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'("^.\\(\\*\\) +[^\\*]" 1 font-lock-comment-face))
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"Default font lock expressions for Buffer Selection Menu.")
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(defcustom bs-max-window-height 20
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"Maximal window height of Buffer Selection Menu."
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:group 'bs-appearance
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:type 'integer)
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(defvar bs-dont-show-regexp nil
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"Regular expression specifying which buffers not to show.
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A buffer whose name matches this regular expression will not be
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included in the buffer list.")
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(defvar bs-must-show-regexp nil
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"Regular expression for specifying buffers which must be shown.
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A buffer whose name matches this regular expression will be
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included in the buffer list.
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Note that this variable is temporary: if the configuration is changed
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it is reset to nil. Use `bs-must-always-show-regexp' to specify buffers
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that must always be shown regardless of the configuration.")
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(defcustom bs-must-always-show-regexp nil
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"Regular expression for specifying buffers to show always.
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A buffer whose name matches this regular expression will
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be shown regardless of current configuration of Buffer Selection Menu."
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:group 'bs
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:type '(choice (const :tag "Nothing at all" nil) regexp))
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(defvar bs-dont-show-function nil
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"Function for specifying buffers not to show.
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The function gets one argument - the buffer to test. The function must
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return a value different from nil to ignore the buffer in
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Buffer Selection Menu.")
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(defvar bs-must-show-function nil
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"Function for specifying buffers which must be shown.
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The function gets one argument - the buffer to test.")
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(defvar bs-buffer-sort-function nil
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"Sort function to sort the buffers that appear in Buffer Selection Menu.
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The function gets two arguments - the buffers to compare.
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It must return non-nil if the first buffer should sort before the second.")
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(defcustom bs-maximal-buffer-name-column 45
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"Maximum column width for buffer names.
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The column for buffer names has dynamic width. The width depends on
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maximal and minimal length of names of buffers to show. The maximal
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width is bounded by `bs-maximal-buffer-name-column'.
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See also `bs-minimal-buffer-name-column'."
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:group 'bs-appearance
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:type 'integer)
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(defcustom bs-minimal-buffer-name-column 15
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"Minimum column width for buffer names.
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The column for buffer names has dynamic width. The width depends on
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maximal and minimal length of names of buffers to show. The minimal
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width is bounded by `bs-minimal-buffer-name-column'.
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See also `bs-maximal-buffer-name-column'."
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:group 'bs-appearance
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:type 'integer)
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(defconst bs-header-lines-length 2
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"Number of lines for headers in Buffer Selection Menu.")
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(defcustom bs-configurations
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'(("all" nil nil nil nil nil)
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("files" nil nil nil bs-visits-non-file bs-sort-buffer-interns-are-last)
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("files-and-scratch" "^\\*scratch\\*$" nil nil bs-visits-non-file
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bs-sort-buffer-interns-are-last)
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("all-intern-last" nil nil nil nil bs-sort-buffer-interns-are-last))
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"List of all configurations you can use in the Buffer Selection Menu.
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A configuration describes which buffers appear in Buffer Selection Menu
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and also the order of buffers. A configuration is a list with
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six elements. The first element is a string and describes the configuration.
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The following five elements represent the values for Buffer Selection Menu
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configuration variables `bs-must-show-regexp', `bs-must-show-function',
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`bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
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By setting these variables you define a configuration."
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:group 'bs-appearance
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:type '(repeat sexp))
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(defcustom bs-default-configuration "files"
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"Name of default configuration used by the Buffer Selection Menu.
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\\<bs-mode-map>
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Will be changed using key \\[bs-select-next-configuration].
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Must be a string used in `bs-configurations' for naming a configuration."
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:group 'bs
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:type 'string)
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(defcustom bs-alternative-configuration "all"
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"Name of configuration used when calling `bs-show' with \
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\\[universal-argument] as prefix key.
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Must be a string used in `bs-configurations' for naming a configuration."
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:group 'bs
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:type 'string)
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(defvar bs-current-configuration bs-default-configuration
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"Name of current configuration.
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Must be a string used in `bs-configurations' for naming a configuration.")
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(defcustom bs-cycle-configuration-name nil
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"Name of configuration used when cycling through the buffer list.
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A value of nil means to use current configuration `bs-default-configuration'.
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Must be a string used in `bs-configurations' for naming a configuration."
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:group 'bs
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:type '(choice (const :tag "like current configuration" nil)
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string))
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(defcustom bs-string-show-always "+"
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"String added in column 1 indicating a buffer will always be shown."
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:group 'bs-appearance
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:type 'string)
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(defcustom bs-string-show-never "-"
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"String added in column 1 indicating a buffer will never be shown."
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:group 'bs-appearance
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:type 'string)
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(defcustom bs-string-current "."
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"String added in column 1 indicating the current buffer."
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:group 'bs-appearance
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:type 'string)
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(defcustom bs-string-current-marked "#"
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"String added in column 1 indicating the current buffer when it is marked."
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:group 'bs-appearance
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:type 'string)
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(defcustom bs-string-marked ">"
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"String added in column 1 indicating a marked buffer."
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:group 'bs-appearance
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:type 'string)
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(defcustom bs-string-show-normally " "
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"String added in column 1 indicating an unmarked buffer."
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:group 'bs-appearance
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:type 'string)
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(defvar bs--name-entry-length 20
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"Maximum length of all displayed buffer names.
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Used internally, only.")
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;; ----------------------------------------------------------------------
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;; Internal globals
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;; ----------------------------------------------------------------------
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(defvar bs-buffer-show-mark nil
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"Flag for the current mode for showing this buffer.
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A value of nil means buffer will be shown depending on the current
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configuration.
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A value of `never' means to never show the buffer.
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A value of `always' means to show buffer regardless of the configuration.")
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(make-variable-buffer-local 'bs-buffer-show-mark)
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;; Make face named region (for XEmacs)
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(unless (facep 'region)
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(make-face 'region)
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(set-face-background 'region "gray75"))
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(defun bs--sort-by-name (b1 b2)
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"Compare buffers B1 and B2 by buffer name."
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(string< (buffer-name b1)
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(buffer-name b2)))
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(defun bs--sort-by-filename (b1 b2)
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"Compare buffers B1 and B2 by file name."
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(string< (or (buffer-file-name b1) "")
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(or (buffer-file-name b2) "")))
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(defun bs--sort-by-mode (b1 b2)
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"Compare buffers B1 and B2 by mode name."
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(save-current-buffer
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(string< (progn (set-buffer b1) (format-mode-line mode-name nil nil b1))
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(progn (set-buffer b2) (format-mode-line mode-name nil nil b2)))))
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(defun bs--sort-by-size (b1 b2)
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"Compare buffers B1 and B2 by buffer size."
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(< (buffer-size b1) (buffer-size b2)))
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(defcustom bs-sort-functions
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'(("by name" bs--sort-by-name "Buffer" region)
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("by size" bs--sort-by-size "Size" region)
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("by mode" bs--sort-by-mode "Mode" region)
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("by filename" bs--sort-by-filename "File" region)
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("by nothing" nil nil nil))
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"List of all possible sorting aspects for Buffer Selection Menu.
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You can add a new entry with a call to `bs-define-sort-function'.
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Each element is a list of four elements (NAME FUNCTION REGEXP-FOR-SORTING FACE).
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NAME specifies the sort order defined by function FUNCTION.
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FUNCTION nil means don't sort the buffer list. Otherwise the function
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must have two parameters - the buffers to compare.
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REGEXP-FOR-SORTING is a regular expression which describes the
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column title to highlight.
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FACE is a face used to fontify the sorted column title. A value of nil means
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don't highlight."
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:group 'bs
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:type '(repeat sexp))
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(defun bs-define-sort-function (name fun &optional regexp-for-sorting face)
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"Define a new function for buffer sorting in Buffer Selection Menu.
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NAME specifies the sort order defined by function FUN.
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A value of nil for FUN means don't sort the buffer list. Otherwise the
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functions must have two parameters - the buffers to compare.
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REGEXP-FOR-SORTING is a regular expression which describes the
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column title to highlight.
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FACE is a face used to fontify the sorted column title. A value of nil means
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don't highlight.
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The new sort aspect will be inserted into list `bs-sort-functions'."
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(let ((tupel (assoc name bs-sort-functions)))
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(if tupel
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(setcdr tupel (list fun regexp-for-sorting face))
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(setq bs-sort-functions
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(cons (list name fun regexp-for-sorting face)
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bs-sort-functions)))))
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(defvar bs--current-sort-function nil
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"Description of the current function for sorting the buffer list.
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This is an element of `bs-sort-functions'.")
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(defcustom bs-default-sort-name "by nothing"
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"Name of default sort behavior.
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Must be \"by nothing\" or a string used in `bs-sort-functions' for
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naming a sort behavior. Default is \"by nothing\" which means no sorting."
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:group 'bs
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:type 'string
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:set (lambda (var-name value)
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(set var-name value)
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(setq bs--current-sort-function
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(assoc value bs-sort-functions))))
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(defvar bs--buffer-coming-from nil
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"The buffer in which the user started the current Buffer Selection Menu.")
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(defvar bs--show-all nil
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"Flag whether showing all buffers regardless of current configuration.
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Non-nil means to show all buffers. Otherwise show buffers
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defined by current configuration `bs-current-configuration'.")
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(defvar bs--window-config-coming-from nil
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"Window configuration before starting Buffer Selection Menu.")
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(defvar bs--intern-show-never "^ \\|\\*buffer-selection\\*"
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"Regular expression specifying which buffers never to show.
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A buffer whose name matches this regular expression will never be
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included in the buffer list.")
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(defvar bs-current-list nil
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"List of buffers shown in Buffer Selection Menu.
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Used internally, only.")
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(defvar bs--marked-buffers nil
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"Currently marked buffers in Buffer Selection Menu.")
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(defvar bs-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map " " 'bs-select)
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(define-key map "f" 'bs-select)
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(define-key map "v" 'bs-view)
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(define-key map "!" 'bs-select-in-one-window)
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(define-key map [mouse-2] 'bs-mouse-select) ;; for GNU EMACS
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(define-key map [button2] 'bs-mouse-select) ;; for XEmacs
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(define-key map "F" 'bs-select-other-frame)
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(let ((key ?1))
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(while (<= key ?9)
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(define-key map (char-to-string key) 'digit-argument)
|
|
(setq key (1+ key))))
|
|
(define-key map "-" 'negative-argument)
|
|
(define-key map "\e-" 'negative-argument)
|
|
(define-key map "o" 'bs-select-other-window)
|
|
(define-key map "\C-o" 'bs-tmp-select-other-window)
|
|
;; for GNU EMACS
|
|
(define-key map [mouse-3] 'bs-mouse-select-other-frame)
|
|
;; for XEmacs
|
|
(define-key map [button3] 'bs-mouse-select-other-frame)
|
|
(define-key map [up] 'bs-up)
|
|
(define-key map "n" 'bs-down)
|
|
(define-key map "p" 'bs-up)
|
|
(define-key map [down] 'bs-down)
|
|
(define-key map "\C-m" 'bs-select)
|
|
(define-key map "b" 'bs-bury-buffer)
|
|
(define-key map "s" 'bs-save)
|
|
(define-key map "S" 'bs-show-sorted)
|
|
(define-key map "a" 'bs-toggle-show-all)
|
|
(define-key map "d" 'bs-delete)
|
|
(define-key map "\C-d" 'bs-delete-backward)
|
|
(define-key map "k" 'bs-delete)
|
|
(define-key map "g" 'bs-refresh)
|
|
(define-key map "C" 'bs-set-configuration-and-refresh)
|
|
(define-key map "c" 'bs-select-next-configuration)
|
|
(define-key map "q" 'bs-kill)
|
|
;; (define-key map "z" 'bs-kill)
|
|
(define-key map "\C-c\C-c" 'bs-kill)
|
|
(define-key map "\C-g" 'bs-abort)
|
|
(define-key map "\C-]" 'bs-abort)
|
|
(define-key map "%" 'bs-toggle-readonly)
|
|
(define-key map "~" 'bs-clear-modified)
|
|
(define-key map "M" 'bs-toggle-current-to-show)
|
|
(define-key map "+" 'bs-set-current-buffer-to-show-always)
|
|
;;(define-key map "-" 'bs-set-current-buffer-to-show-never)
|
|
(define-key map "t" 'bs-visit-tags-table)
|
|
(define-key map "m" 'bs-mark-current)
|
|
(define-key map "u" 'bs-unmark-current)
|
|
(define-key map ">" 'scroll-right)
|
|
(define-key map "<" 'scroll-left)
|
|
(define-key map "?" 'bs-help)
|
|
map)
|
|
"Keymap of `bs-mode'.")
|
|
|
|
;; ----------------------------------------------------------------------
|
|
;; Functions
|
|
;; ----------------------------------------------------------------------
|
|
|
|
(defun bs-buffer-list (&optional list sort-description)
|
|
"Return a list of buffers to be shown.
|
|
LIST is a list of buffers to test for appearance in Buffer Selection Menu.
|
|
The result list depends on the global variables `bs-dont-show-regexp',
|
|
`bs-must-show-regexp', `bs-dont-show-function', `bs-must-show-function'
|
|
and `bs-buffer-sort-function'.
|
|
If SORT-DESCRIPTION isn't nil the list will be sorted by
|
|
a special function. SORT-DESCRIPTION is an element of `bs-sort-functions'."
|
|
(setq sort-description (or sort-description bs--current-sort-function)
|
|
list (or list (buffer-list)))
|
|
(let ((result nil))
|
|
(dolist (buf list)
|
|
(let* ((buffername (buffer-name buf))
|
|
(int-show-never (string-match-p bs--intern-show-never buffername))
|
|
(ext-show-never (and bs-dont-show-regexp
|
|
(string-match-p bs-dont-show-regexp
|
|
buffername)))
|
|
(extern-must-show (or (and bs-must-always-show-regexp
|
|
(string-match-p
|
|
bs-must-always-show-regexp
|
|
buffername))
|
|
(and bs-must-show-regexp
|
|
(string-match-p bs-must-show-regexp
|
|
buffername))))
|
|
(extern-show-never-from-fun (and bs-dont-show-function
|
|
(funcall bs-dont-show-function
|
|
buf)))
|
|
(extern-must-show-from-fun (and bs-must-show-function
|
|
(funcall bs-must-show-function
|
|
buf)))
|
|
(show-flag (buffer-local-value 'bs-buffer-show-mark buf)))
|
|
(when (or (eq show-flag 'always)
|
|
(and (or bs--show-all (not (eq show-flag 'never)))
|
|
(not int-show-never)
|
|
(or bs--show-all
|
|
extern-must-show
|
|
extern-must-show-from-fun
|
|
(and (not ext-show-never)
|
|
(not extern-show-never-from-fun)))))
|
|
(setq result (cons buf result)))))
|
|
(setq result (reverse result))
|
|
;; The current buffer which was the start point of bs should be an element
|
|
;; of result list, so that we can leave with space and be back in the
|
|
;; buffer we started bs-show.
|
|
(when (and bs--buffer-coming-from
|
|
(buffer-live-p bs--buffer-coming-from)
|
|
(not (memq bs--buffer-coming-from result)))
|
|
(setq result (cons bs--buffer-coming-from result)))
|
|
;; sorting
|
|
(if (and sort-description
|
|
(nth 1 sort-description))
|
|
(setq result (sort result (nth 1 sort-description)))
|
|
;; else standard sorting
|
|
(bs-buffer-sort result))))
|
|
|
|
(defun bs-buffer-sort (buffer-list)
|
|
"Sort buffers in BUFFER-LIST according to `bs-buffer-sort-function'."
|
|
(if bs-buffer-sort-function
|
|
(sort buffer-list bs-buffer-sort-function)
|
|
buffer-list))
|
|
|
|
(defun bs--redisplay (&optional keep-line-p sort-description)
|
|
"Redisplay whole Buffer Selection Menu.
|
|
If KEEP-LINE-P is non-nil the point will stay on current line.
|
|
SORT-DESCRIPTION is an element of `bs-sort-functions'."
|
|
(let ((line (1+ (count-lines 1 (point)))))
|
|
(bs-show-in-buffer (bs-buffer-list nil sort-description))
|
|
(when keep-line-p
|
|
(goto-line line))
|
|
(beginning-of-line)))
|
|
|
|
(defun bs--goto-current-buffer ()
|
|
"Goto line which represents the current buffer;
|
|
actually the line which begins with character in `bs-string-current' or
|
|
`bs-string-current-marked'."
|
|
(let ((regexp (concat "^"
|
|
(regexp-quote bs-string-current)
|
|
"\\|^"
|
|
(regexp-quote bs-string-current-marked)))
|
|
point)
|
|
(save-excursion
|
|
(goto-char (point-min))
|
|
(when (search-forward-regexp regexp nil t)
|
|
(setq point (1- (point)))))
|
|
(when point
|
|
(goto-char point))))
|
|
|
|
(defun bs--current-config-message ()
|
|
"Return a string describing the current `bs-mode' configuration."
|
|
(if bs--show-all
|
|
"Show all buffers."
|
|
(format "Show buffer by configuration %S"
|
|
bs-current-configuration)))
|
|
|
|
(defun bs--track-window-changes (frame)
|
|
"Track window changes to refresh the buffer list.
|
|
Used from `window-size-change-functions'."
|
|
(let ((win (get-buffer-window "*buffer-selection*" frame)))
|
|
(when win
|
|
(with-selected-window win
|
|
(bs--set-window-height)))))
|
|
|
|
(defun bs--remove-hooks ()
|
|
"Remove `bs--track-window-changes' and auxiliary hooks."
|
|
(remove-hook 'window-size-change-functions 'bs--track-window-changes)
|
|
;; Remove itself
|
|
(remove-hook 'kill-buffer-hook 'bs--remove-hooks t)
|
|
(remove-hook 'change-major-mode-hook 'bs--remove-hooks t))
|
|
|
|
(put 'bs-mode 'mode-class 'special)
|
|
|
|
(define-derived-mode bs-mode nil "Buffer-Selection-Menu"
|
|
"Major mode for editing a subset of Emacs' buffers.
|
|
\\<bs-mode-map>
|
|
Aside from two header lines each line describes one buffer.
|
|
Move to a line representing the buffer you want to edit and select
|
|
buffer by \\[bs-select] or SPC. Abort buffer list with \\[bs-kill].
|
|
There are many key commands similar to `Buffer-menu-mode' for
|
|
manipulating the buffer list and buffers.
|
|
For faster navigation each digit key is a digit argument.
|
|
|
|
\\[bs-select] or SPACE -- select current line's buffer and other marked buffers.
|
|
\\[bs-toggle-show-all] -- toggle between all buffers and a special subset.
|
|
\\[bs-select-other-window] -- select current line's buffer in other window.
|
|
\\[bs-tmp-select-other-window] -- make another window display that buffer and
|
|
remain in Buffer Selection Menu.
|
|
\\[bs-mouse-select] -- select current line's buffer and other marked buffers.
|
|
\\[bs-save] -- save current line's buffer immediately.
|
|
\\[bs-delete] -- kill current line's buffer immediately.
|
|
\\[bs-toggle-readonly] -- toggle read-only status of current line's buffer.
|
|
\\[bs-clear-modified] -- clear modified-flag on that buffer.
|
|
\\[bs-mark-current] -- mark current line's buffer to be displayed.
|
|
\\[bs-unmark-current] -- unmark current line's buffer to be displayed.
|
|
\\[bs-show-sorted] -- display buffer list sorted by next sort aspect.
|
|
\\[bs-set-configuration-and-refresh] -- ask user for a configuration and \
|
|
apply selected configuration.
|
|
\\[bs-select-next-configuration] -- select and apply next \
|
|
available Buffer Selection Menu configuration.
|
|
\\[bs-kill] -- leave Buffer Selection Menu without a selection.
|
|
\\[bs-toggle-current-to-show] -- toggle status of appearance.
|
|
\\[bs-set-current-buffer-to-show-always] -- mark current line's buffer \
|
|
to show always.
|
|
\\[bs-visit-tags-table] -- call `visit-tags-table' on current line's buffer.
|
|
\\[bs-help] -- display this help text."
|
|
(make-local-variable 'font-lock-defaults)
|
|
(make-local-variable 'font-lock-verbose)
|
|
(make-local-variable 'font-lock-global-modes)
|
|
(buffer-disable-undo)
|
|
(setq buffer-read-only t
|
|
truncate-lines t
|
|
show-trailing-whitespace nil
|
|
font-lock-global-modes '(not bs-mode)
|
|
font-lock-defaults '(bs-mode-font-lock-keywords t)
|
|
font-lock-verbose nil)
|
|
(add-hook 'window-size-change-functions 'bs--track-window-changes)
|
|
(add-hook 'kill-buffer-hook 'bs--remove-hooks nil t)
|
|
(add-hook 'change-major-mode-hook 'bs--remove-hooks nil t))
|
|
|
|
(defun bs--restore-window-config ()
|
|
"Restore window configuration on the current frame."
|
|
(when bs--window-config-coming-from
|
|
(let ((frame (selected-frame)))
|
|
(unwind-protect
|
|
(set-window-configuration bs--window-config-coming-from)
|
|
(select-frame frame)))
|
|
(setq bs--window-config-coming-from nil)))
|
|
|
|
(defun bs-kill ()
|
|
"Let buffer disappear and reset window configuration."
|
|
(interactive)
|
|
(bury-buffer (current-buffer))
|
|
(bs--restore-window-config))
|
|
|
|
(defun bs-abort ()
|
|
"Ding and leave Buffer Selection Menu without a selection."
|
|
(interactive)
|
|
(ding)
|
|
(bs-kill))
|
|
|
|
(defun bs-set-configuration-and-refresh ()
|
|
"Ask user for a configuration and apply selected configuration.
|
|
Refresh whole Buffer Selection Menu."
|
|
(interactive)
|
|
(call-interactively 'bs-set-configuration)
|
|
(bs--redisplay t))
|
|
|
|
(defun bs-refresh ()
|
|
"Refresh whole Buffer Selection Menu."
|
|
(interactive)
|
|
(bs--redisplay t))
|
|
|
|
(defun bs--set-window-height ()
|
|
"Change the height of the selected window to suit the current buffer list."
|
|
(unless (one-window-p t)
|
|
(fit-window-to-buffer (selected-window) bs-max-window-height)))
|
|
|
|
(defun bs--current-buffer ()
|
|
"Return buffer on current line.
|
|
Raise an error if not on a buffer line."
|
|
(beginning-of-line)
|
|
(let ((line (+ (- bs-header-lines-length)
|
|
(count-lines 1 (point)))))
|
|
(when (< line 0)
|
|
(error "You are on a header row"))
|
|
(nth line bs-current-list)))
|
|
|
|
(defun bs--update-current-line ()
|
|
"Update the entry on current line for Buffer Selection Menu."
|
|
(let ((buffer (bs--current-buffer))
|
|
(inhibit-read-only t))
|
|
(beginning-of-line)
|
|
(delete-region (point) (line-end-position))
|
|
(bs--insert-one-entry buffer)
|
|
(beginning-of-line)))
|
|
|
|
(defun bs-view ()
|
|
"View current line's buffer in View mode.
|
|
Leave Buffer Selection Menu."
|
|
(interactive)
|
|
(view-buffer (bs--current-buffer)))
|
|
|
|
(defun bs-select ()
|
|
"Select current line's buffer and other marked buffers.
|
|
If there are no marked buffers the window configuration before starting
|
|
Buffer Selection Menu will be restored.
|
|
If there are marked buffers each marked buffer and the current line's buffer
|
|
will be selected in a window.
|
|
Leave Buffer Selection Menu."
|
|
(interactive)
|
|
(let ((buffer (bs--current-buffer)))
|
|
(bury-buffer (current-buffer))
|
|
(bs--restore-window-config)
|
|
(switch-to-buffer buffer)
|
|
(when bs--marked-buffers
|
|
;; Some marked buffers for selection
|
|
(let* ((all (delq buffer bs--marked-buffers))
|
|
(height (/ (1- (frame-height)) (1+ (length all)))))
|
|
(delete-other-windows)
|
|
(switch-to-buffer buffer)
|
|
(dolist (buf all)
|
|
(split-window nil height)
|
|
(other-window 1)
|
|
(switch-to-buffer buf))
|
|
;; goto window we have started bs.
|
|
(other-window 1)))))
|
|
|
|
(defun bs-select-other-window ()
|
|
"Select current line's buffer by `switch-to-buffer-other-window'.
|
|
The window configuration before starting Buffer Selection Menu will be restored
|
|
unless there is no other window. In this case a new window will be created.
|
|
Leave Buffer Selection Menu."
|
|
(interactive)
|
|
(let ((buffer (bs--current-buffer)))
|
|
(bury-buffer (current-buffer))
|
|
(bs--restore-window-config)
|
|
(switch-to-buffer-other-window buffer)))
|
|
|
|
(defun bs-tmp-select-other-window ()
|
|
"Make the other window select this line's buffer.
|
|
The current window remains selected."
|
|
(interactive)
|
|
(let ((buffer (bs--current-buffer)))
|
|
(display-buffer buffer t)))
|
|
|
|
(defun bs-select-other-frame ()
|
|
"Select current line's buffer in new created frame.
|
|
Leave Buffer Selection Menu."
|
|
(interactive)
|
|
(let ((buffer (bs--current-buffer)))
|
|
(bury-buffer (current-buffer))
|
|
(bs--restore-window-config)
|
|
(switch-to-buffer-other-frame buffer)))
|
|
|
|
(defun bs-mouse-select-other-frame (event)
|
|
"Select selected line's buffer in new created frame.
|
|
Leave Buffer Selection Menu.
|
|
EVENT: a mouse click event."
|
|
(interactive "e")
|
|
(mouse-set-point event)
|
|
(bs-select-other-frame))
|
|
|
|
(defun bs-mouse-select (event)
|
|
"Select buffer on mouse click EVENT.
|
|
Select buffer by `bs-select'."
|
|
(interactive "e")
|
|
(mouse-set-point event)
|
|
(bs-select))
|
|
|
|
(defun bs-select-in-one-window ()
|
|
"Select current line's buffer in one window and delete other windows.
|
|
Leave Buffer Selection Menu."
|
|
(interactive)
|
|
(bs-select)
|
|
(delete-other-windows))
|
|
|
|
(defun bs-bury-buffer ()
|
|
"Bury buffer on current line."
|
|
(interactive)
|
|
(bury-buffer (bs--current-buffer))
|
|
(bs--redisplay t))
|
|
|
|
(defun bs-save ()
|
|
"Save buffer on current line."
|
|
(interactive)
|
|
(with-current-buffer (bs--current-buffer)
|
|
(save-buffer))
|
|
(bs--update-current-line))
|
|
|
|
(defun bs-visit-tags-table ()
|
|
"Visit the tags table in the buffer on this line.
|
|
See `visit-tags-table'."
|
|
(interactive)
|
|
(let ((file (buffer-file-name (bs--current-buffer))))
|
|
(if file
|
|
(visit-tags-table file)
|
|
(error "Specified buffer has no file"))))
|
|
|
|
(defun bs-toggle-current-to-show ()
|
|
"Toggle status of showing flag for buffer in current line."
|
|
(interactive)
|
|
(let ((res
|
|
(with-current-buffer (bs--current-buffer)
|
|
(setq bs-buffer-show-mark (case bs-buffer-show-mark
|
|
((nil) 'never)
|
|
((never) 'always)
|
|
(t nil))))))
|
|
(bs--update-current-line)
|
|
(bs--set-window-height)
|
|
(bs--show-config-message res)))
|
|
|
|
(defun bs-set-current-buffer-to-show-always (&optional not-to-show-p)
|
|
"Toggle status of buffer on line to `always shown'.
|
|
NOT-TO-SHOW-P: prefix argument.
|
|
With no prefix argument the buffer on current line is marked to show
|
|
always. Otherwise it is marked to show never."
|
|
(interactive "P")
|
|
(if not-to-show-p
|
|
(bs-set-current-buffer-to-show-never)
|
|
(bs--set-toggle-to-show (bs--current-buffer) 'always)))
|
|
|
|
(defun bs-set-current-buffer-to-show-never ()
|
|
"Toggle status of buffer on line to `never shown'."
|
|
(interactive)
|
|
(bs--set-toggle-to-show (bs--current-buffer) 'never))
|
|
|
|
(defun bs--set-toggle-to-show (buffer what)
|
|
"Set value `bs-buffer-show-mark' of buffer BUFFER to WHAT.
|
|
Redisplay current line and display a message describing
|
|
the status of buffer on current line."
|
|
(with-current-buffer buffer (setq bs-buffer-show-mark what))
|
|
(bs--update-current-line)
|
|
(bs--set-window-height)
|
|
(bs--show-config-message what))
|
|
|
|
(defun bs--mark-unmark (count fun)
|
|
"Call FUN on COUNT consecutive buffers of *buffer-selection*."
|
|
(let ((dir (if (> count 0) 1 -1)))
|
|
(dotimes (i (abs count))
|
|
(let ((buffer (bs--current-buffer)))
|
|
(when buffer (funcall fun buffer))
|
|
(bs--update-current-line)
|
|
(bs-down dir)))))
|
|
|
|
(defun bs-mark-current (count)
|
|
"Mark buffers.
|
|
COUNT is the number of buffers to mark.
|
|
Move cursor vertically down COUNT lines."
|
|
(interactive "p")
|
|
(bs--mark-unmark count
|
|
(lambda (buf)
|
|
(add-to-list 'bs--marked-buffers buf))))
|
|
|
|
(defun bs-unmark-current (count)
|
|
"Unmark buffers.
|
|
COUNT is the number of buffers to unmark.
|
|
Move cursor vertically down COUNT lines."
|
|
(interactive "p")
|
|
(bs--mark-unmark count
|
|
(lambda (buf)
|
|
(setq bs--marked-buffers (delq buf bs--marked-buffers)))))
|
|
|
|
(defun bs--show-config-message (what)
|
|
"Show message indicating the new showing status WHAT.
|
|
WHAT is a value of nil, `never', or `always'."
|
|
(bs-message-without-log (cond ((null what)
|
|
"Buffer will be shown normally.")
|
|
((eq what 'never)
|
|
"Mark buffer to never be shown.")
|
|
(t "Mark buffer to show always."))))
|
|
|
|
(defun bs-delete ()
|
|
"Kill buffer on current line."
|
|
(interactive)
|
|
(let ((current (bs--current-buffer))
|
|
(inhibit-read-only t))
|
|
(unless (kill-buffer current)
|
|
(error "Buffer was not deleted"))
|
|
(setq bs-current-list (delq current bs-current-list))
|
|
(beginning-of-line)
|
|
(delete-region (point) (save-excursion
|
|
(end-of-line)
|
|
(if (eobp) (point) (1+ (point)))))
|
|
(when (eobp)
|
|
(backward-delete-char 1)
|
|
(beginning-of-line)
|
|
(recenter -1))
|
|
(bs--set-window-height)))
|
|
|
|
(defun bs-delete-backward ()
|
|
"Like `bs-delete' but go to buffer in front of current."
|
|
(interactive)
|
|
(let ((on-last-line-p (save-excursion (end-of-line) (eobp))))
|
|
(bs-delete)
|
|
(unless on-last-line-p
|
|
(bs-up 1))))
|
|
|
|
(defun bs-show-sorted ()
|
|
"Show buffer list sorted by next sort aspect."
|
|
(interactive)
|
|
(setq bs--current-sort-function
|
|
(bs-next-config-aux (car bs--current-sort-function)
|
|
bs-sort-functions))
|
|
(bs--redisplay)
|
|
(bs--goto-current-buffer)
|
|
(bs-message-without-log "Sorted %s" (car bs--current-sort-function)))
|
|
|
|
(defun bs-apply-sort-faces (&optional sort-description)
|
|
"Set text properties for the sort described by SORT-DESCRIPTION.
|
|
SORT-DESCRIPTION is an element of `bs-sort-functions'.
|
|
Default is `bs--current-sort-function'."
|
|
(let ((sort-description (or sort-description
|
|
bs--current-sort-function)))
|
|
(save-excursion
|
|
(goto-char (point-min))
|
|
(when (and (nth 2 sort-description)
|
|
(search-forward-regexp (nth 2 sort-description) nil t))
|
|
(let ((inhibit-read-only t))
|
|
(put-text-property (match-beginning 0)
|
|
(match-end 0)
|
|
'face
|
|
(or (nth 3 sort-description)
|
|
'region)))))))
|
|
|
|
(defun bs-toggle-show-all ()
|
|
"Toggle show all buffers / show buffers with current configuration."
|
|
(interactive)
|
|
(setq bs--show-all (not bs--show-all))
|
|
(bs--redisplay)
|
|
(bs--goto-current-buffer)
|
|
(bs-message-without-log "%s" (bs--current-config-message)))
|
|
|
|
(defun bs-toggle-readonly ()
|
|
"Toggle read-only status for buffer on current line.
|
|
Uses function `toggle-read-only'."
|
|
(interactive)
|
|
(with-current-buffer (bs--current-buffer)
|
|
(toggle-read-only))
|
|
(bs--update-current-line))
|
|
|
|
(defun bs-clear-modified ()
|
|
"Set modified flag for buffer on current line to nil."
|
|
(interactive)
|
|
(with-current-buffer (bs--current-buffer)
|
|
(set-buffer-modified-p nil))
|
|
(bs--update-current-line))
|
|
|
|
(defun bs--nth-wrapper (count fun &rest args)
|
|
"Call COUNT times function FUN with arguments ARGS."
|
|
(dotimes (i (or count 1))
|
|
(apply fun args)))
|
|
|
|
(defun bs-up (arg)
|
|
"Move cursor vertically up ARG lines in Buffer Selection Menu."
|
|
(interactive "p")
|
|
(if (and arg (numberp arg) (< arg 0))
|
|
(bs--nth-wrapper (- arg) 'bs--down)
|
|
(bs--nth-wrapper arg 'bs--up)))
|
|
|
|
(defun bs--up ()
|
|
"Move cursor vertically up one line.
|
|
If on top of buffer list go to last line."
|
|
(if (> (count-lines 1 (point)) bs-header-lines-length)
|
|
(forward-line -1)
|
|
(goto-char (point-max))
|
|
(beginning-of-line)
|
|
(recenter -1)))
|
|
|
|
(defun bs-down (arg)
|
|
"Move cursor vertically down ARG lines in Buffer Selection Menu."
|
|
(interactive "p")
|
|
(if (and arg (numberp arg) (< arg 0))
|
|
(bs--nth-wrapper (- arg) 'bs--up)
|
|
(bs--nth-wrapper arg 'bs--down)))
|
|
|
|
(defun bs--down ()
|
|
"Move cursor vertically down one line.
|
|
If at end of buffer list go to first line."
|
|
(if (eq (line-end-position) (point-max))
|
|
(progn
|
|
(goto-char (point-min))
|
|
(forward-line bs-header-lines-length))
|
|
(forward-line 1)))
|
|
|
|
(defun bs-visits-non-file (buffer)
|
|
"Return whether BUFFER visits no file.
|
|
A value of t means BUFFER belongs to no file.
|
|
A value of nil means BUFFER belongs to a file."
|
|
(not (buffer-file-name buffer)))
|
|
|
|
(defun bs-sort-buffer-interns-are-last (b1 b2)
|
|
"Function for sorting internal buffers at the end of all buffers."
|
|
(string-match-p "^\\*" (buffer-name b2)))
|
|
|
|
;; ----------------------------------------------------------------------
|
|
;; Configurations:
|
|
;; ----------------------------------------------------------------------
|
|
|
|
(defun bs-config-clear ()
|
|
"Reset all variables which specify a configuration.
|
|
These variables are `bs-dont-show-regexp', `bs-must-show-regexp',
|
|
`bs-dont-show-function', `bs-must-show-function' and
|
|
`bs-buffer-sort-function'."
|
|
(setq bs-dont-show-regexp nil
|
|
bs-must-show-regexp nil
|
|
bs-dont-show-function nil
|
|
bs-must-show-function nil
|
|
bs-buffer-sort-function nil))
|
|
|
|
(defun bs-config--only-files ()
|
|
"Define a configuration for showing only buffers visiting a file."
|
|
(bs-config-clear)
|
|
(setq ;; I want to see *-buffers at the end
|
|
bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
|
|
;; Don't show files who don't belong to a file
|
|
bs-dont-show-function 'bs-visits-non-file))
|
|
|
|
(defun bs-config--files-and-scratch ()
|
|
"Define a configuration for showing buffer *scratch* and file buffers."
|
|
(bs-config-clear)
|
|
(setq ;; I want to see *-buffers at the end
|
|
bs-buffer-sort-function 'bs-sort-buffer-interns-are-last
|
|
;; Don't show files who don't belong to a file
|
|
bs-dont-show-function 'bs-visits-non-file
|
|
;; Show *scratch* buffer.
|
|
bs-must-show-regexp "^\\*scratch\\*$"))
|
|
|
|
(defun bs-config--all ()
|
|
"Define a configuration for showing all buffers.
|
|
Reset all according variables by `bs-config-clear'."
|
|
(bs-config-clear))
|
|
|
|
(defun bs-config--all-intern-last ()
|
|
"Define a configuration for showing all buffers.
|
|
Internal buffers appear at end of all buffers."
|
|
(bs-config-clear)
|
|
;; I want to see *-buffers at the end
|
|
(setq bs-buffer-sort-function 'bs-sort-buffer-interns-are-last))
|
|
|
|
(defun bs-set-configuration (name)
|
|
"Set configuration to the one saved under string NAME in `bs-configurations'.
|
|
When called interactively ask user for a configuration and apply selected
|
|
configuration."
|
|
(interactive (list (completing-read "Use configuration: "
|
|
bs-configurations
|
|
nil
|
|
t)))
|
|
(let ((list (assoc name bs-configurations)))
|
|
(if list
|
|
(if (listp list)
|
|
(setq bs-current-configuration name
|
|
bs-must-show-regexp (nth 1 list)
|
|
bs-must-show-function (nth 2 list)
|
|
bs-dont-show-regexp (nth 3 list)
|
|
bs-dont-show-function (nth 4 list)
|
|
bs-buffer-sort-function (nth 5 list))
|
|
;; for backward compability
|
|
(funcall (cdr list)))
|
|
;; else
|
|
(ding)
|
|
(bs-message-without-log "No bs-configuration named %S." name))))
|
|
|
|
(defun bs-help ()
|
|
"Help for `bs-show'."
|
|
(interactive)
|
|
(describe-function 'bs-mode))
|
|
|
|
(defun bs-next-config-aux (start-name list)
|
|
"Get the next assoc after START-NAME in list LIST.
|
|
Will return the first if START-NAME is at end."
|
|
(let ((assocs list)
|
|
(length (length list))
|
|
pos)
|
|
(while (and assocs (not pos))
|
|
(when (string= (car (car assocs)) start-name)
|
|
(setq pos (- length (length assocs))))
|
|
(setq assocs (cdr assocs)))
|
|
(setq pos (1+ pos))
|
|
(if (eq pos length)
|
|
(car list)
|
|
(nth pos list))))
|
|
|
|
(defun bs-next-config (name)
|
|
"Return next configuration with respect to configuration with name NAME."
|
|
(bs-next-config-aux name bs-configurations))
|
|
|
|
(defun bs-select-next-configuration (&optional start-name)
|
|
"Apply next configuration START-NAME and refresh buffer list.
|
|
If START-NAME is nil the current configuration `bs-current-configuration'
|
|
will be used."
|
|
(interactive)
|
|
(let ((config (bs-next-config (or start-name bs-current-configuration))))
|
|
(bs-set-configuration (car config))
|
|
(setq bs-default-configuration bs-current-configuration)
|
|
(bs--redisplay t)
|
|
(bs--set-window-height)
|
|
(bs-message-without-log "Selected configuration: %s" (car config))))
|
|
|
|
(defun bs-show-in-buffer (list)
|
|
"Display buffer list LIST in buffer *buffer-selection*.
|
|
Select buffer *buffer-selection* and display buffers according to current
|
|
configuration `bs-current-configuration'. Set window height, fontify buffer
|
|
and move point to current buffer."
|
|
(setq bs-current-list list)
|
|
(switch-to-buffer (get-buffer-create "*buffer-selection*"))
|
|
(bs-mode)
|
|
(let* ((inhibit-read-only t)
|
|
(map-fun (lambda (entry)
|
|
(length (buffer-name entry))))
|
|
(max-length-of-names (apply 'max
|
|
(cons 0 (mapcar map-fun list))))
|
|
(name-entry-length (min bs-maximal-buffer-name-column
|
|
(max bs-minimal-buffer-name-column
|
|
max-length-of-names))))
|
|
(erase-buffer)
|
|
(setq bs--name-entry-length name-entry-length)
|
|
(bs--show-header)
|
|
(dolist (buffer list)
|
|
(bs--insert-one-entry buffer)
|
|
(insert "\n"))
|
|
(delete-backward-char 1)
|
|
(bs--set-window-height)
|
|
(bs--goto-current-buffer)
|
|
(font-lock-fontify-buffer)
|
|
(bs-apply-sort-faces)
|
|
(set-buffer-modified-p nil)))
|
|
|
|
(defun bs-next-buffer (&optional buffer-list sorting-p)
|
|
"Return next buffer and buffer list for buffer cycling in BUFFER-LIST.
|
|
Ignore sorting when SORTING-P is nil.
|
|
If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
|
|
buffer list. The result is a cons of normally the second element of
|
|
BUFFER-LIST and the buffer list used for buffer cycling."
|
|
(let* ((bs--current-sort-function (if sorting-p
|
|
bs--current-sort-function))
|
|
(bs-buffer-list (or buffer-list (bs-buffer-list))))
|
|
(cons (or (car (cdr bs-buffer-list))
|
|
(car bs-buffer-list)
|
|
(current-buffer))
|
|
bs-buffer-list)))
|
|
|
|
(defun bs-previous-buffer (&optional buffer-list sorting-p)
|
|
"Return previous buffer and buffer list for buffer cycling in BUFFER-LIST.
|
|
Ignore sorting when SORTING-P is nil.
|
|
If BUFFER-LIST is nil the result of `bs-buffer-list' will be used as
|
|
buffer list. The result is a cons of last element of BUFFER-LIST and the
|
|
buffer list used for buffer cycling."
|
|
(let* ((bs--current-sort-function (if sorting-p
|
|
bs--current-sort-function))
|
|
(bs-buffer-list (or buffer-list (bs-buffer-list))))
|
|
(cons (or (car (last bs-buffer-list))
|
|
(current-buffer))
|
|
bs-buffer-list)))
|
|
|
|
(defun bs-message-without-log (&rest args)
|
|
"Like `message' but don't log it on the message log.
|
|
All arguments ARGS are transferred to function `message'."
|
|
(let ((message-log-max nil))
|
|
(apply 'message args)))
|
|
|
|
(defvar bs--cycle-list nil
|
|
"Current buffer list used for cycling.")
|
|
|
|
;;;###autoload
|
|
(defun bs-cycle-next ()
|
|
"Select next buffer defined by buffer cycling.
|
|
The buffers taking part in buffer cycling are defined
|
|
by buffer configuration `bs-cycle-configuration-name'."
|
|
(interactive)
|
|
(let ((bs--buffer-coming-from (current-buffer))
|
|
(bs-dont-show-regexp bs-dont-show-regexp)
|
|
(bs-must-show-regexp bs-must-show-regexp)
|
|
(bs-dont-show-function bs-dont-show-function)
|
|
(bs-must-show-function bs-must-show-function)
|
|
(bs--show-all nil))
|
|
(bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
|
|
(let ((bs-buffer-sort-function nil)
|
|
(bs--current-sort-function nil))
|
|
(let* ((tupel (bs-next-buffer (if (or (eq last-command
|
|
'bs-cycle-next)
|
|
(eq last-command
|
|
'bs-cycle-previous))
|
|
bs--cycle-list)))
|
|
(next (car tupel))
|
|
(cycle-list (cdr tupel)))
|
|
(unless (window-dedicated-p (selected-window))
|
|
;; We don't want the frame iconified if the only window in the frame
|
|
;; happens to be dedicated; let's get the error from switch-to-buffer
|
|
(bury-buffer))
|
|
(switch-to-buffer next)
|
|
(setq bs--cycle-list (append (cdr cycle-list)
|
|
(list (car cycle-list))))
|
|
(bs-message-without-log "Next buffers: %s"
|
|
(or (cdr bs--cycle-list)
|
|
"this buffer"))))))
|
|
|
|
;;;###autoload
|
|
(defun bs-cycle-previous ()
|
|
"Select previous buffer defined by buffer cycling.
|
|
The buffers taking part in buffer cycling are defined
|
|
by buffer configuration `bs-cycle-configuration-name'."
|
|
(interactive)
|
|
(let ((bs--buffer-coming-from (current-buffer))
|
|
(bs-dont-show-regexp bs-dont-show-regexp)
|
|
(bs-must-show-regexp bs-must-show-regexp)
|
|
(bs-dont-show-function bs-dont-show-function)
|
|
(bs-must-show-function bs-must-show-function)
|
|
(bs--show-all nil))
|
|
(bs-set-configuration (or bs-cycle-configuration-name bs-default-configuration))
|
|
(let ((bs-buffer-sort-function nil)
|
|
(bs--current-sort-function nil))
|
|
(let* ((tupel (bs-previous-buffer (if (or (eq last-command
|
|
'bs-cycle-next)
|
|
(eq last-command
|
|
'bs-cycle-previous))
|
|
bs--cycle-list)))
|
|
(prev-buffer (car tupel))
|
|
(cycle-list (cdr tupel)))
|
|
(switch-to-buffer prev-buffer)
|
|
(setq bs--cycle-list (append (last cycle-list)
|
|
(reverse (cdr (reverse cycle-list)))))
|
|
(bs-message-without-log "Previous buffers: %s"
|
|
(or (reverse (cdr bs--cycle-list))
|
|
"this buffer"))))))
|
|
|
|
(defun bs--get-value (fun &optional args)
|
|
"Apply function FUN with arguments ARGS.
|
|
Return result of evaluation. Will return FUN if FUN is a number
|
|
or a string."
|
|
(cond ((numberp fun)
|
|
fun)
|
|
((stringp fun)
|
|
fun)
|
|
(t (apply fun args))))
|
|
|
|
(defun bs--get-marked-string (start-buffer all-buffers)
|
|
"Return a string which describes whether current buffer is marked.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu.
|
|
The result string is one of `bs-string-current', `bs-string-current-marked',
|
|
`bs-string-marked', `bs-string-show-normally', `bs-string-show-never', or
|
|
`bs-string-show-always'."
|
|
(cond ;; current buffer is the buffer we started buffer selection.
|
|
((eq (current-buffer) start-buffer)
|
|
(if (memq (current-buffer) bs--marked-buffers)
|
|
bs-string-current-marked ; buffer is marked
|
|
bs-string-current))
|
|
;; current buffer is marked
|
|
((memq (current-buffer) bs--marked-buffers)
|
|
bs-string-marked)
|
|
;; current buffer hasn't a special mark.
|
|
((null bs-buffer-show-mark)
|
|
bs-string-show-normally)
|
|
;; current buffer has a mark not to show itself.
|
|
((eq bs-buffer-show-mark 'never)
|
|
bs-string-show-never)
|
|
;; otherwise current buffer is marked to show always.
|
|
(t
|
|
bs-string-show-always)))
|
|
|
|
(defun bs--get-modified-string (start-buffer all-buffers)
|
|
"Return a string which describes whether current buffer is modified.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
|
|
(if (buffer-modified-p) "*" " "))
|
|
|
|
(defun bs--get-readonly-string (start-buffer all-buffers)
|
|
"Return a string which describes whether current buffer is read only.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
|
|
(if buffer-read-only "%" " "))
|
|
|
|
(defun bs--get-size-string (start-buffer all-buffers)
|
|
"Return a string which describes the size of current buffer.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
|
|
(int-to-string (buffer-size)))
|
|
|
|
(defun bs--get-name (start-buffer all-buffers)
|
|
"Return name of current buffer for Buffer Selection Menu.
|
|
The name of current buffer gets additional text properties
|
|
for mouse highlighting.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
|
|
(propertize (buffer-name)
|
|
'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"
|
|
'mouse-face 'highlight))
|
|
|
|
(defun bs--get-mode-name (start-buffer all-buffers)
|
|
"Return the name of mode of current buffer for Buffer Selection Menu.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
|
|
(format-mode-line mode-name nil nil start-buffer))
|
|
|
|
(defun bs--get-file-name (start-buffer all-buffers)
|
|
"Return string for column 'File' in Buffer Selection Menu.
|
|
This is the variable `buffer-file-name' of current buffer.
|
|
If current mode is `dired-mode' or `shell-mode' it returns the
|
|
default directory.
|
|
START-BUFFER is the buffer where we started buffer selection.
|
|
ALL-BUFFERS is the list of buffers appearing in Buffer Selection Menu."
|
|
(propertize (if (member major-mode '(shell-mode dired-mode))
|
|
default-directory
|
|
(or buffer-file-name ""))
|
|
'mouse-face 'highlight
|
|
'help-echo "mouse-2: select this buffer, mouse-3: select in other frame"))
|
|
|
|
(defun bs--insert-one-entry (buffer)
|
|
"Generate one entry for buffer BUFFER in Buffer Selection Menu.
|
|
It goes over all columns described in `bs-attributes-list'
|
|
and evaluates corresponding string. Inserts string in current buffer;
|
|
normally *buffer-selection*."
|
|
(let ((string "")
|
|
(to-much 0)
|
|
(apply-args (append (list bs--buffer-coming-from bs-current-list))))
|
|
(with-current-buffer buffer
|
|
(dolist (column bs-attributes-list)
|
|
(let* ((min (bs--get-value (nth 1 column)))
|
|
(new-string (bs--format-aux (bs--get-value (nth 4 column) ; fun
|
|
apply-args)
|
|
(nth 3 column) ; align
|
|
(- min to-much)))
|
|
(len (length new-string)))
|
|
(setq string (concat string new-string))
|
|
(when (> len min)
|
|
(setq to-much (- len min))))))
|
|
(insert string)))
|
|
|
|
(defun bs--format-aux (string align len)
|
|
"Pad STRING to length LEN with alignment ALIGN.
|
|
ALIGN is one of the symbols `left', `middle', or `right'."
|
|
(let* ((width (length string))
|
|
(len (max len width)))
|
|
(format (format "%%%s%ds" (if (eq align 'right) "" "-") len)
|
|
(if (eq align 'middle)
|
|
(concat (make-string (/ (- len width) 2) ?\s) string)
|
|
string))))
|
|
|
|
(defun bs--show-header ()
|
|
"Insert header for Buffer Selection Menu in current buffer."
|
|
(insert (bs--create-header-line #'identity)
|
|
"\n"
|
|
(bs--create-header-line (lambda (title)
|
|
(make-string (length title) ?-)))
|
|
"\n"))
|
|
|
|
(defun bs--get-name-length ()
|
|
"Return value of `bs--name-entry-length'."
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|
bs--name-entry-length)
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|
|
|
(defun bs--create-header-line (col)
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|
"Generate a line for the header.
|
|
COL is called for each column in `bs-attributes-list' as a
|
|
function of one argument, the string heading for the column."
|
|
(mapconcat (lambda (column)
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|
(bs--format-aux (funcall col (bs--get-value (car column)))
|
|
(nth 3 column) ; align
|
|
(bs--get-value (nth 1 column))))
|
|
bs-attributes-list
|
|
""))
|
|
|
|
(defun bs--show-with-configuration (name &optional arg)
|
|
"Display buffer list of configuration with name NAME.
|
|
Set configuration NAME and determine window for Buffer Selection Menu.
|
|
Unless current buffer is buffer *buffer-selection* we have to save
|
|
the buffer we started Buffer Selection Menu and the current window
|
|
configuration to restore buffer and window configuration after a
|
|
selection. If there is already a window displaying *buffer-selection*
|
|
select this window for Buffer Selection Menu. Otherwise open a new
|
|
window.
|
|
The optional argument ARG is the prefix argument when calling a function
|
|
for buffer selection."
|
|
(bs-set-configuration name)
|
|
(let ((bs--show-all (or bs--show-all arg)))
|
|
(unless (string= "*buffer-selection*" (buffer-name))
|
|
;; Only when not in buffer *buffer-selection*
|
|
;; we have to set the buffer we started the command
|
|
(setq bs--buffer-coming-from (current-buffer)))
|
|
(let ((liste (bs-buffer-list))
|
|
(active-window (get-window-with-predicate
|
|
(lambda (w)
|
|
(string= (buffer-name (window-buffer w))
|
|
"*buffer-selection*"))
|
|
nil (selected-frame))))
|
|
(if active-window
|
|
(select-window active-window)
|
|
(bs--restore-window-config)
|
|
(setq bs--window-config-coming-from (current-window-configuration))
|
|
(when (> (window-height (selected-window)) 7)
|
|
(split-window-vertically)
|
|
(other-window 1)))
|
|
(bs-show-in-buffer liste)
|
|
(bs-message-without-log "%s" (bs--current-config-message)))))
|
|
|
|
(defun bs--configuration-name-for-prefix-arg (prefix-arg)
|
|
"Convert prefix argument PREFIX-ARG to a name of a buffer configuration.
|
|
If PREFIX-ARG is nil return `bs-default-configuration'.
|
|
If PREFIX-ARG is an integer return PREFIX-ARG element of `bs-configurations'.
|
|
Otherwise return `bs-alternative-configuration'."
|
|
(cond ;; usually activation
|
|
((null prefix-arg)
|
|
bs-default-configuration)
|
|
;; call with integer as prefix argument
|
|
((integerp prefix-arg)
|
|
(if (and (< 0 prefix-arg) (<= prefix-arg (length bs-configurations)))
|
|
(car (nth (1- prefix-arg) bs-configurations))
|
|
bs-default-configuration))
|
|
;; call by prefix argument C-u
|
|
(t bs-alternative-configuration)))
|
|
|
|
;; ----------------------------------------------------------------------
|
|
;; Main function bs-customize and bs-show
|
|
;; ----------------------------------------------------------------------
|
|
|
|
;;;###autoload
|
|
(defun bs-customize ()
|
|
"Customization of group bs for Buffer Selection Menu."
|
|
(interactive)
|
|
(customize-group "bs"))
|
|
|
|
;;;###autoload
|
|
(defun bs-show (arg)
|
|
"Make a menu of buffers so you can manipulate buffers or the buffer list.
|
|
\\<bs-mode-map>
|
|
There are many key commands similar to `Buffer-menu-mode' for
|
|
manipulating the buffer list and the buffers themselves.
|
|
User can move with [up] or [down], select a buffer
|
|
by \\[bs-select] or [SPC]\n
|
|
Type \\[bs-kill] to leave Buffer Selection Menu without a selection.
|
|
Type \\[bs-help] after invocation to get help on commands available.
|
|
With prefix argument ARG show a different buffer list. Function
|
|
`bs--configuration-name-for-prefix-arg' determine accordingly
|
|
name of buffer configuration."
|
|
(interactive "P")
|
|
(setq bs--marked-buffers nil)
|
|
(bs--show-with-configuration (bs--configuration-name-for-prefix-arg arg)))
|
|
|
|
;; ----------------------------------------------------------------------
|
|
;; Cleanup
|
|
;; ----------------------------------------------------------------------
|
|
|
|
(defun bs-unload-function ()
|
|
"Unload the Buffer Selection library."
|
|
(let ((bs-buf (get-buffer "*buffer-selection*")))
|
|
(when bs-buf
|
|
(with-current-buffer bs-buf
|
|
(when (eq major-mode 'bs-mode)
|
|
(bs-kill)
|
|
(kill-buffer bs-buf)))))
|
|
;; continue standard unloading
|
|
nil)
|
|
|
|
;; Now provide feature bs
|
|
(provide 'bs)
|
|
|
|
;; arch-tag: c0d9ab34-bf06-4368-ae9d-af88878e6802
|
|
;;; bs.el ends here
|