109 lines
4.7 KiB
EmacsLisp
109 lines
4.7 KiB
EmacsLisp
;;; buffers.el --- Default settings for buffers. -*- lexical-binding: t; -*-
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;; Time-stamp: <2020-03-10T14:01:00+0100>
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;;; Commentary:
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;; * Setup scratch buffer.
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;; * Set fill-column.
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;; * Define which buffers should be ignored.
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;; * Enable auto-fill-mode.
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;;; Code:
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(use-package emacs
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:ensure nil
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:custom ((initial-scratch-message nil) ; Make scratch buffer empty,
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(initial-major-mode 'gfm-mode)) ; and select mode.
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:config (progn
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(defvar my/skippable-buffers '("^\\*" "^magit[:-]")
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"Buffer names ignored by `next-buffer' and `previous-buffer'.")
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(defvar my/never-skippable-buffers
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'("^\\*scratch\\*$" "^\\*Easy-hugo\\*$")
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"Buffer names never ignored by `next-buffer' and `previous-buffer'.")
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(defun my/buffer-predicate (buffer)
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"Return nil if buffer-name matches expression in `my/skippable-buffers'."
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(catch 'return
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;; Return t if buffer-name is on never-skippable list.
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(dolist (expression my/never-skippable-buffers)
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(if (string-match expression (buffer-name buffer))
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(throw 'return t)))
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;; Return nil if buffer-name is on skippable list.
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(dolist (expression my/skippable-buffers)
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(if (string-match expression (buffer-name buffer))
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(throw 'return nil)))
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t))
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(set-frame-parameter nil 'buffer-predicate 'my/buffer-predicate)
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(defun my/truncate-lines ()
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"Truncate lines in local buffer instead of wrapping them."
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(setq-local truncate-lines t)))
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:bind (("M-<left>" . previous-buffer)
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("M-<right>" . next-buffer))
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:hook ((prog-mode . my/truncate-lines)
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(conf-mode . my/truncate-lines)))
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;; Show and select buffers. Minimal interface for recovery situations.
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(use-package bs
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:bind ("C-x C-b" . bs-show))
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;; Delete old buffers.
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;; https://www.emacswiki.org/emacs/CleanBufferList
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(use-package midnight
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:defer 10
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:init (setq midnight-delay 30 ; 30 seconds after “midnight”.
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midnight-period (* 2 60 60)) ; Clean every 2 hours.
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:custom ((clean-buffer-list-delay-general 1) ; Clean normal bufs after 1d,
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(clean-buffer-list-delay-special (* 30 60))) ; special after 30m.
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:config (progn
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(setq clean-buffer-list-kill-regexps ; Add these to special buffers.
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(nconc clean-buffer-list-kill-regexps
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'("^magit-?.*:"
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"\\.log$"
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"^\\*rdm\\*$"
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"^\\*Backtrace\\*$"
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"^Pfuture-Callback"
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)))
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(midnight-mode t)))
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;; Dedicate windows to “purposes”.
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(use-package window-purpose
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:pin melpa ; We need > 1.7 <https://github.com/bmag/emacs-purpose/issues/158>
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:defer nil
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:config (progn
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(purpose-mode)
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(add-to-list 'purpose-user-mode-purposes '(c++-mode . cpp))
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(add-to-list 'purpose-user-mode-purposes '(qml-mode . cpp))
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(add-to-list 'purpose-user-mode-purposes '(emacs-lisp-mode . elisp))
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(add-to-list 'purpose-user-mode-purposes '(ebuild-mode . ebuild))
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(add-to-list 'purpose-user-mode-purposes '(adoc-mode . adoc))
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(add-to-list 'purpose-user-mode-purposes '(markdown-mode . md))
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(add-to-list 'purpose-user-mode-purposes '(gfm-mode . md))
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(add-to-list 'purpose-user-mode-purposes '(Man-mode . help-buf))
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(add-to-list 'purpose-user-mode-purposes '(help-mode . help-buf))
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(add-to-list 'purpose-user-mode-purposes '(info-mode . help-buf))
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(add-to-list 'purpose-user-mode-purposes
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'(compilation-mode . compile))
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(add-to-list 'purpose-special-action-sequences
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'(help-buf purpose-display-reuse-window-buffer))
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(purpose-compile-user-configuration)
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(require 'window-purpose-x)
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;; Assign all Magit buffers the same purpose.
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(purpose-x-magit-single-on)
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(purpose-x-kill-setup)) ; Replace killed buffers with same purpose.
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:bind (("<f2>" . purpose-toggle-window-purpose-dedicated)
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("C-<f2>" . purpose-toggle-window-buffer-dedicated)
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("M-<f2>" . purpose-load-window-layout)))
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;; Highlight which buffer is active by dimming the others.
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(use-package dimmer
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:pin melpa ; We need > 0.4.2 for configure-magit.
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:config (progn
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(dimmer-configure-which-key)
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(dimmer-configure-magit)
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(dimmer-mode t)))
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(provide 'basics/buffers)
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;;; buffers.el ends here
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