Emacs useful tips

Link: Emacs

Text search and completion §

Full text search for both English and Chinese §

[2023-09-03 Sun] Use helm-org-rifle to search text with preview pane Use M-x counsel-ripgrep or M-x consult-org-roam-search to search full text in orgmode/orgroam directory Note that the search is conflicted with ivy

Auto completion §

Use ivy package to enhance autocompletion (conflit with ripgrep)

File explorer function when find files §

Use counsel pacakge to counsel-find-files, after finding a file, press M-o to show more options such as open in other window, delete, etc

Backlink §

Backlink display §

Preview through backlinks §

Use consult-org-roam with M-x consult-org-roam-backlinks to scan through each backlinks

Add all backlinks as block in current file §

Use org-roam-backlink-collections with M-x org-roam-backlink-collections-add-all to add all backlinks (read only) in current note. Alternatively, use ~mode to preview without actual adding it.

Package management §

Refresh package source §

If it shows “xx package not found” for a package available on MELPA, use M-x package-refresh-contents to refresh

Theme §

Auto switch light/dark mode §

Source: https://yannesposito.com/posts/0014-change-emacs-theme-automatically/index.html Did some minor changes since the original code is in doom emacs.

     (defun y/auto-update-theme ()
  "depending on time use different theme"
  ;; morning to afternoon: nord-light
  ;; night: monokai-machine
  (let* ((hour (nth 2 (decode-time (current-time))))
         (theme (cond ((<= 6 hour 18)   'doom-nord-light)
                      (t               'doom-monokai-machine))))
    (when (not (equal custom-enabled-themes theme))
      (load-theme theme t))
    ;; run that function again next hour
    (run-at-time (format "%02d:%02d" (+ hour 1) 0) nil 'y/auto-update-theme)))
 
(y/auto-update-theme)

Clock table §

Use :tstart ”<-30d>” :tend “<now>” to indicate date range, e.g.

#+BEGIN: clocktable :maxlevel 9 :scope agenda :tstart ”<-30d>” :tend “<now>” :step semimonth :hidefiles t :emphasize t :compact t :properties (“Effort”)

Custom key binding §

To customize key bindings for exising commands, define it directly with “SPC” won’t work. Instead, check out which keymap it belongs to. E.g. kill-this-buffer is part of doom-leader-map, and then define it by map!.

;; Bind SPC b k to 'kill-this-buffer'
(map! :map doom-leader-map
      "b k" #'kill-this-buffer)

Turn off evil mode in selected buffer mode §

(evil-set-initial-state 'dired-mode 'emacs)