112 lines
4.9 KiB
EmacsLisp
112 lines
4.9 KiB
EmacsLisp
;;; ui/vc-gutter/config.el -*- lexical-binding: t; -*-
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(defvar +vc-gutter-in-margin nil
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"If non-nil, use the margin for diffs instead of the fringe.")
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(defvar +vc-gutter-in-remote-files nil
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"If non-nil, enable the vc gutter in remote files (e.g. open through TRAMP).")
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(defvar +vc-gutter-diff-unsaved-buffer nil
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"If non-nil, `diff-hl-flydiff-mode' will be activated. This allows on-the-fly
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diffing, even for unsaved buffers.")
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(defvar +vc-gutter-default-style t
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"If non-nil, enable the default look of the vc gutter. This means subtle thin
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bitmaps on the left, an arrow bitmap for flycheck, and flycheck indicators moved
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to the right fringe.")
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;;
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;; Packages
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(use-package! git-gutter
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:commands git-gutter:revert-hunk git-gutter:stage-hunk
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:init
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(add-hook! 'find-file-hook
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(defun +vc-gutter-init-maybe-h ()
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"Enable `git-gutter-mode' in the current buffer.
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If the buffer doesn't represent an existing file, `git-gutter-mode's activation
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is deferred until the file is saved. Respects `git-gutter:disabled-modes'."
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(when (or +vc-gutter-in-remote-files
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(not (file-remote-p (or buffer-file-name default-directory))))
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(if (not buffer-file-name)
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(add-hook 'after-save-hook #'+vc-gutter-init-maybe-h nil 'local)
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(when (and (vc-backend buffer-file-name)
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(progn
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(require 'git-gutter)
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(not (memq major-mode git-gutter:disabled-modes))))
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(if (and (display-graphic-p)
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(require 'git-gutter-fringe nil t))
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(progn
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(setq-local git-gutter:init-function #'git-gutter-fr:init)
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(setq-local git-gutter:view-diff-function #'git-gutter-fr:view-diff-infos)
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(setq-local git-gutter:clear-function #'git-gutter-fr:clear)
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(setq-local git-gutter:window-width -1))
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(setq-local git-gutter:init-function 'nil)
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(setq-local git-gutter:view-diff-function #'git-gutter:view-diff-infos)
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(setq-local git-gutter:clear-function #'git-gutter:clear-diff-infos)
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(setq-local git-gutter:window-width 1))
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(git-gutter-mode +1)
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(remove-hook 'after-save-hook #'+vc-gutter-init-maybe-h 'local))))))
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;; Disable in Org mode, as per
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;; <https://github.com/syl20bnr/spacemacs/issues/10555> and
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;; <https://github.com/syohex/emacs-git-gutter/issues/24>. Apparently, the
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;; mode-enabling function for global minor modes gets called for new buffers
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;; while they are still in `fundamental-mode', before a major mode has been
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;; assigned. I don't know why this is the case, but adding `fundamental-mode'
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;; here fixes the issue.
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(setq git-gutter:disabled-modes '(fundamental-mode image-mode pdf-view-mode))
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;; standardize default fringe width
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(if (fboundp 'fringe-mode) (fringe-mode '4))
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:config
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(set-popup-rule! "^\\*git-gutter" :select nil :size '+popup-shrink-to-fit)
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;; Update git-gutter on focus (in case I was using git externally)
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(add-hook 'focus-in-hook #'git-gutter:update-all-windows)
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(add-hook! '(doom-escape-hook doom-switch-window-hook) :append
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(defun +vc-gutter-update-h (&rest _)
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"Refresh git-gutter on ESC. Return nil to prevent shadowing other
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`doom-escape-hook' hooks."
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(when (and git-gutter-mode
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(not (memq this-command '(git-gutter:stage-hunk
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git-gutter:revert-hunk))))
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(ignore (git-gutter)))))
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;; update git-gutter when using magit commands
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(advice-add #'magit-stage-file :after #'+vc-gutter-update-h)
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(advice-add #'magit-unstage-file :after #'+vc-gutter-update-h)
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(defadvice! +vc-gutter--fix-linearity-of-hunks-a (diffinfos is-reverse)
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"Fixes `git-gutter:next-hunk' and `git-gutter:previous-hunk' sometimes
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jumping to random hunks."
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:override #'git-gutter:search-near-diff-index
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(cl-position-if (let ((lineno (line-number-at-pos)))
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(lambda (line)
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(funcall (if is-reverse #'> #'<) lineno line)))
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diffinfos
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:key #'git-gutter-hunk-start-line
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:from-end is-reverse)))
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;; subtle diff indicators in the fringe
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(when +vc-gutter-default-style
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(after! git-gutter-fringe
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;; places the git gutter outside the margins.
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(setq-default fringes-outside-margins t)
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;; thin fringe bitmaps
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(define-fringe-bitmap 'git-gutter-fr:added [224]
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nil nil '(center repeated))
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(define-fringe-bitmap 'git-gutter-fr:modified [224]
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nil nil '(center repeated))
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(define-fringe-bitmap 'git-gutter-fr:deleted [128 192 224 240]
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nil nil 'bottom)
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;; let diff have left fringe, flycheck can have right fringe
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(after! flycheck
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(setq flycheck-indication-mode 'right-fringe)
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;; A non-descript, left-pointing arrow
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(define-fringe-bitmap 'flycheck-fringe-bitmap-double-arrow
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[16 48 112 240 112 48 16] nil nil 'center))))
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