653e80e655
If Emacs wasn't built with X, Cocoa or NS display support (as is the case for evm emacs-25.1-travis build), the fringe library is missing and throws errors.
303 lines
11 KiB
EmacsLisp
303 lines
11 KiB
EmacsLisp
;; core-ui.el --- draw me like one of your French editors
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(defvar doom-ui-fringe-size '4 "Default fringe width")
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(setq-default
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bidi-display-reordering nil ; disable bidirectional text for tiny performance boost
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blink-matching-paren nil ; don't blink--too distracting
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cursor-in-non-selected-windows nil ; hide cursors in other windows
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frame-inhibit-implied-resize t
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;; remove continuation arrow on right fringe
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fringe-indicator-alist (delq (assq 'continuation fringe-indicator-alist)
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fringe-indicator-alist)
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highlight-nonselected-windows nil
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image-animate-loop t
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indicate-buffer-boundaries nil
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indicate-empty-lines nil
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jit-lock-defer-time nil
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jit-lock-stealth-nice 0.1
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jit-lock-stealth-time 0.2
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jit-lock-stealth-verbose nil
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max-mini-window-height 0.3
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mode-line-default-help-echo nil ; disable mode-line mouseovers
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mouse-yank-at-point t ; middle-click paste at point, not at click
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resize-mini-windows 'grow-only ; Minibuffer resizing
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show-help-function nil ; hide :help-echo text
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show-paren-delay 0.075
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show-paren-highlight-openparen t
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show-paren-when-point-inside-paren t
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split-width-threshold nil ; favor horizontal splits
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uniquify-buffer-name-style 'forward
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use-dialog-box nil ; always avoid GUI
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visible-cursor nil
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x-stretch-cursor nil
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;; no beeping or blinking please
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ring-bell-function #'ignore
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visible-bell nil
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;; Ask for confirmation on quit only if real buffers exist
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confirm-kill-emacs (lambda (_) (if (doom-real-buffers-list) (y-or-n-p "››› Quit?") t)))
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(fset #'yes-or-no-p #'y-or-n-p) ; y/n instead of yes/no
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;; auto-enabled in Emacs 25+; I'd rather enable it manually
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(global-eldoc-mode -1)
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;; show typed keystrokes in minibuffer
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(setq echo-keystrokes 0.02)
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;; ...but hide them while isearch is active
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(add-hook! isearch-mode (setq echo-keystrokes 0))
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(add-hook! isearch-mode-end (setq echo-keystrokes 0.02))
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;; A minor mode for toggling the mode-line
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(defvar-local doom--modeline-format nil
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"The modeline format to use when `doom-hide-modeline-mode' is active. Don't
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set this directly. Bind it in `let' instead.")
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(defvar-local doom--old-modeline-format nil
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"The old modeline format, so `doom-hide-modeline-mode' can revert when it's
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disabled.")
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(define-minor-mode doom-hide-modeline-mode
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"Minor mode to hide the mode-line in the current buffer."
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:init-value nil
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:global nil
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(if doom-hide-modeline-mode
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(setq doom--old-modeline-format mode-line-format
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mode-line-format doom--modeline-format)
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(setq mode-line-format doom--old-modeline-format
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doom--old-modeline-format nil))
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(force-mode-line-update))
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;; Ensure major-mode or theme changes don't overwrite these variables
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(put 'doom--modeline-format 'permanent-local t)
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(put 'doom--old-modeline-format 'permanent-local t)
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(put 'doom-hide-modeline-mode 'permanent-local t)
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(defun doom|hide-modeline-mode-reset ()
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"Sometimes, a major-mode is activated after `doom-hide-modeline-mode' is
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activated, thus disabling it (because changing major modes invokes
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`kill-all-local-variables' and specifically seems to kill `mode-line-format's
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local value, whether or not it's permanent-local. Therefore, we cycle
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`doom-hide-modeline-mode' to fix this."
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(when doom-hide-modeline-mode
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(doom-hide-modeline-mode -1)
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(doom-hide-modeline-mode +1)))
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(add-hook 'after-change-major-mode-hook #'doom|hide-modeline-mode-reset)
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;; no modeline in completion popups
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(add-hook 'completion-list-mode-hook #'doom-hide-modeline-mode)
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;; undo/redo changes to Emacs' window layout
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(defvar winner-dont-bind-my-keys t) ; I'll bind keys myself
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(require 'winner)
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(add-hook 'window-setup-hook #'winner-mode)
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;;
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;; Bootstrap
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;;
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(tooltip-mode -1) ; relegate tooltips to echo area only
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(menu-bar-mode -1)
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(when (display-graphic-p)
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(scroll-bar-mode -1)
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(tool-bar-mode -1)
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;; buffer name in frame title
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(setq-default frame-title-format '("DOOM Emacs"))
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;; standardize fringe width
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(push (cons 'left-fringe doom-ui-fringe-size) default-frame-alist)
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(push (cons 'right-fringe doom-ui-fringe-size) default-frame-alist)
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;; no fringe in the minibuffer
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(add-hook! (emacs-startup minibuffer-setup)
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(set-window-fringes (minibuffer-window) 0 0 nil)))
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;;
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;; Plugins
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;;
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;; I modified the built-in `hideshow' package to enable itself when needed. A
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;; better, more vim-like code-folding plugin would be the `origami' plugin, but
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;; until certain breaking bugs are fixed in it, I won't switch over.
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(def-package! hideshow ; built-in
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:commands (hs-minor-mode hs-toggle-hiding hs-already-hidden-p)
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:init
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(defun doom*autoload-hideshow ()
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(unless (bound-and-true-p hs-minor-mode)
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(hs-minor-mode 1)))
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(advice-add #'evil-toggle-fold :before #'doom*autoload-hideshow)
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:config
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(setq hs-hide-comments-when-hiding-all nil))
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;; Show uninterrupted indentation markers with some whitespace voodoo.
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(def-package! highlight-indentation
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:commands (highlight-indentation-mode highlight-indentation-current-column-mode)
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:config
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(defun doom|inject-trailing-whitespace (&optional start end)
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"The opposite of `delete-trailing-whitespace'. Injects whitespace into
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buffer so that `highlight-indentation-mode' will display uninterrupted indent
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markers. This whitespace is stripped out on save, as not to affect the resulting
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file."
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(interactive (progn (barf-if-buffer-read-only)
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(if (use-region-p)
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(list (region-beginning) (region-end))
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(list nil nil))))
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(unless indent-tabs-mode
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(save-match-data
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(save-excursion
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(let ((end-marker (copy-marker (or end (point-max))))
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(start (or start (point-min))))
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(goto-char start)
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(while (and (re-search-forward "^$" end-marker t) (< (point) end-marker))
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(let (line-start line-end next-start next-end)
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(save-excursion
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;; Check previous line indent
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(forward-line -1)
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(setq line-start (point)
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line-end (save-excursion (back-to-indentation) (point)))
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;; Check next line indent
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(forward-line 2)
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(setq next-start (point)
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next-end (save-excursion (back-to-indentation) (point)))
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;; Back to origin
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(forward-line -1)
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;; Adjust indent
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(let* ((line-indent (- line-end line-start))
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(next-indent (- next-end next-start))
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(indent (min line-indent next-indent)))
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(insert (make-string (if (zerop indent) 0 (1+ indent)) ? )))))
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(forward-line 1)))))
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(set-buffer-modified-p nil))
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nil)
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(add-hook! (highlight-indentation-mode highlight-indentation-current-column-mode)
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(if (or highlight-indentation-mode highlight-indentation-current-column-mode)
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(progn
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(doom|inject-trailing-whitespace)
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(add-hook 'before-save-hook #'delete-trailing-whitespace nil t)
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(add-hook 'after-save-hook #'doom|inject-trailing-whitespace nil t))
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(remove-hook 'before-save-hook #'delete-trailing-whitespace t)
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(remove-hook 'after-save-hook #'doom|inject-trailing-whitespace t)
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(delete-trailing-whitespace))))
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;; For modes that don't adequately highlight numbers
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(def-package! highlight-numbers :commands highlight-numbers-mode)
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;; Line highlighting
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(def-package! hl-line ; built-in
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:init
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(add-hook! (linum-mode nlinum-mode) #'hl-line-mode)
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:config
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;; stickiness doesn't play nice with emacs 25+
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(setq hl-line-sticky-flag nil
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global-hl-line-sticky-flag nil)
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;; acts weird with evil visual mode, so disable it temporarily
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(defun doom|hl-line-off () (hl-line-mode -1))
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(after! evil
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(add-hook! 'hl-line-mode-hook
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(when hl-line-mode
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(add-hook 'evil-visual-state-entry-hook #'doom|hl-line-off nil t)
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(add-hook 'evil-visual-state-exit-hook #'hl-line-mode nil t)))))
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;; Line numbers
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(def-package! linum
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:commands linum-mode
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:preface (defvar linum-format "%4d ")
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:init
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(add-hook! (prog-mode text-mode)
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(unless (eq major-mode 'org-mode)
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(call-interactively #'linum-mode)))
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:config
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(require 'hlinum) ; highlight current line number
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(hlinum-activate))
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;; Helps us distinguish stacked delimiter pairs. Especially in parentheses-drunk
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;; languages like Lisp.
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(def-package! rainbow-delimiters
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:commands rainbow-delimiters-mode
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:config (setq rainbow-delimiters-max-face-count 3)
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:init (add-hook 'lisp-mode-hook #'rainbow-delimiters-mode))
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;; indicators for empty lines past EOF
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(def-package! vi-tilde-fringe
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:when (display-graphic-p)
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:demand t
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:config (global-vi-tilde-fringe-mode t))
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;; For a distractions-free-like UI, that dynamically resizes margets and can
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;; center a buffer.
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(def-package! visual-fill-column
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:commands visual-fill-column-mode
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:config
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(setq-default visual-fill-column-center-text nil
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visual-fill-column-width fill-column))
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;;
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;; Modeline
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;;
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(defmacro def-modeline-segment! (name &rest forms)
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"Defines a modeline segment and byte compiles it."
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(declare (indent defun) (doc-string 2))
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(let ((sym (intern (format "doom-modeline-segment--%s" name))))
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`(progn
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(defun ,sym () ,@forms)
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,(unless (bound-and-true-p byte-compile-current-file)
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`(let (byte-compile-warnings)
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(byte-compile #',sym))))))
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(defsubst doom--prepare-modeline-segments (segments)
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(let (segs)
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(dolist (seg segments (nreverse segs))
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(push (if (stringp seg)
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seg
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(list (intern (format "doom-modeline-segment--%s" (symbol-name seg)))))
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segs))))
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(defmacro def-modeline! (name lhs &optional rhs)
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"Defines a modeline format and byte-compiles it. NAME is a symbol to identify
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it (used by `doom-modeline' for retrieval). LHS and RHS are lists of symbols of
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modeline segments defined with `def-modeline-segment!'.
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Example:
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(def-modeline! minimal
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(bar matches \" \" buffer-info)
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(media-info major-mode))
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(doom-set-modeline 'minimal t)"
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(let ((sym (intern (format "doom-modeline-format--%s" name)))
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(lhs-forms (doom--prepare-modeline-segments lhs))
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(rhs-forms (doom--prepare-modeline-segments rhs)))
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`(progn
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(defun ,sym ()
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(let ((lhs (list ,@lhs-forms))
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(rhs (list ,@rhs-forms)))
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(list lhs
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(propertize
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" " 'display
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`((space :align-to (- (+ right right-fringe right-margin)
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,(+ 1 (string-width (format-mode-line rhs)))))))
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rhs)))
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,(unless (bound-and-true-p byte-compile-current-file)
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`(let (byte-compile-warnings)
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(byte-compile #',sym))))))
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(defun doom-modeline (key)
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"Returns a mode-line configuration associated with KEY (a symbol). Throws an
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error if it doesn't exist."
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(let ((fn (intern (format "doom-modeline-format--%s" key))))
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(when (functionp fn)
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`(:eval (,fn)))))
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(defun doom-set-modeline (key &optional default)
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"Set the modeline format. Does nothing if the modeline KEY doesn't exist. If
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DEFAULT is non-nil, set the default mode-line for all buffers."
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(let ((modeline (doom-modeline key)))
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(when modeline
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(setf (if default
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(default-value 'mode-line-format)
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(buffer-local-value 'mode-line-format (current-buffer)))
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modeline))))
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(provide 'core-ui)
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;;; core-ui.el ends here
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