#+title: Emacs Config
#+property: header-args:elisp :mkdirp yes :results silent :padline no
#+property: header-args:elisp+ :tangle "~/.config/emacs/init.el"

* General
** Settings
Quality of life settings.
#+begin_src elisp
  (setq-default
   help-window-select t
   delete-by-moving-to-trash t
   sentence-end-double-space nil
   confirm-kill-emacs 'yes-or-no-p
   scroll-conservatively 101
   cursor-in-non-selected-windows nil)
#+end_src

** Startup Screen
Disable default startup screen.
#+begin_src elisp
  (setq-default inhibit-startup-screen t)
#+end_src

** GUI Bars
Disable GUI bars.
#+begin_src elisp
  (tool-bar-mode -1)
  (menu-bar-mode -1)
  (scroll-bar-mode -1)
#+end_src

** Minibuffer
Enable vertical minibuffer.
#+begin_src elisp
  (fido-vertical-mode)
#+end_src

** Behaviour
Automatically move cursor point on window split.
#+begin_src elisp
  (advice-add 'split-window-below
              :after (lambda (&rest r) (other-window 1)))
  (advice-add 'split-window-right
              :after (lambda (&rest r) (other-window 1)))
#+end_src

Add advice to copy line at cursor point or region.
#+begin_src elisp
  (defadvice kill-ring-save (before dwim-copy activate compile)
    "Copy the current line at cursor point or region."
    (interactive
     (if mark-active
         (list (region-beginning) (region-end))
       (message "Line copied")
       (list (line-beginning-position)
             (line-beginning-position 2)))))
#+end_src

Add advice to cut line or region at cursor point.
#+begin_src elisp
  (defadvice kill-region (before dwim-cut activate compile)
    "Cut the current line at point or region."
    (interactive
     (if mark-active (list (region-beginning) (region-end))
       (list (line-beginning-position)
             (line-beginning-position 2)))))
#+end_src

Add advice to enable ~query-replace~ to search the whole buffer or region if selected, as the original default behaviour would only begin to replace from the cursor point position.
#+begin_src elisp
  (defun +advice-goto-top-no-region (func &rest args)
    "Move point to top of buffer when no region applying ARGS to FUNC."
    (save-excursion
      (when (not (use-region-p))
        (goto-char (point-min)))
      (apply func args)))

  (advice-add 'query-replace :around #'+advice-goto-top-no-region)
  (advice-add 'query-replace-regexp :around #'+advice-goto-top-no-region)
#+end_src

** Editor
Tab behaviour settings.
#+begin_src elisp
  (setq-default
   tab-width 4
   tab-always-indent 'complete
   backward-delete-char-untabify-method 'hungry
   indent-tabs-mode nil)
#+end_src

Replace selected region when yanking text.
#+begin_src elisp
  (delete-selection-mode)
#+end_src

Auto update buffer on any file changes.
#+begin_src elisp
  (global-auto-revert-mode)
#+end_src

Automatically remove trailing whitespace on file-save.
#+begin_src elisp
  (add-hook 'before-save-hook #'whitespace-cleanup)
#+end_src

Increase default column width.
#+begin_src elisp
  (setq-default fill-column 80)
#+end_src

Set whitespace column length and symbols.
#+begin_src elisp
  (with-eval-after-load 'whitespace
    (setq-default
     whitespace-line-column fill-column
     whitespace-display-mappings '((space-mark ?\s [?·] [?.])
                                   (newline-mark ?\n [?↴ ?\n])
                                   (tab-mark ?\t [?➔ ?\t] [?\\ ?\t]))))
#+end_src

Enable pairing brackets.
#+begin_src elisp
  (electric-pair-mode)
#+end_src

** Theme
Enable theme.
#+begin_src elisp
  (load-theme 'modus-vivendi)
#+end_src

** Modeline
Enable column number in modeline.
#+begin_src elisp
  (column-number-mode)
#+end_src

** Completion
Enable completions previews.
#+begin_src elisp
  (add-hook 'prog-mode-hook
            #'completion-preview-mode)
#+end_src

Set completion keybindings.
#+begin_src elisp
  (with-eval-after-load 'completion-preview
    (let ((map completion-preview-active-mode-map))
      (keymap-set map "M-n" #'completion-preview-next-candidate)
      (keymap-set map "M-p" #'completion-preview-prev-candidate)))
#+end_src

** Which-key
Enable which-key that displays a pop-up window of posisble keybindings sequences.
#+begin_src elisp
  (which-key-mode)
#+end_src

** Winner-mode
Enable winner-mode.
#+begin_src elisp
  (winner-mode)
#+end_src

Set winner mode keybindings.
#+begin_src elisp
  (with-eval-after-load 'winner
    (keymap-set winner-mode-map "C-<" #'winner-undo)
    (keymap-set winner-mode-map "C->" #'winner-redo))
#+end_src

** History
*** Minibuffer History
Enable saving minibuffer history.
#+begin_src elisp :noweb yes
  (savehist-mode)
  (with-eval-after-load 'savehist
    <<savehist-settings>>)
#+end_src

Automatically save history on exit.
#+begin_example elisp :tangle no :noweb-ref savehist-settings
  (add-hook 'kill-emacs-hook #'savehist-save)
#+end_example

Ensure savehist file is loaded.
#+begin_src elisp :tangle no :noweb-ref savehist-settings
  (unless savehist-loaded
    (load-file savehist-file))
#+end_src

Add addtional variable lists to save.
#+begin_src elisp :tangle no :noweb-ref savehist-settings
  (dolist (var '(command-history
                 register-alist
                 mark-ring
                 kill-ring
                 search-ring
                 regexp-search-ring))
    (cl-pushnew var savehist-additional-variables))
#+end_src

*** Recent Files
Enable saving history of recent opened files.
#+begin_src elisp :noweb yes
  (recentf-mode)
  (with-eval-after-load 'recentf
    <<recentf-settings>>)
#+end_src

Recentf settings.
#+begin_src elisp :tangle no :noweb-ref recentf-settings
  (setq-default
   recentf-max-saved-items 50
   recentf-auto-cleanup 'never)
#+end_src

Save recent files and cleanup file list on exit.
#+begin_src elisp :tangle no :noweb-ref recentf-settings
  (add-hook 'kill-emacs-hook #'recentf-cleanup)
  (add-hook 'kill-emacs-hook #'recentf-save-list)
#+end_src

Disallow duplicates in history.
#+begin_src elisp :tangle no :noweb-ref recentf-settings
  (setq-default history-delete-duplicates t)
#+end_src

*** Cursor Point Position
Enable saving cursor point positions.
#+begin_src elisp :noweb yes
  (save-place-mode)
  (with-eval-after-load 'saveplace
    <<saveplace-settings>>)
#+end_src

Save place settings.
#+begin_src elisp :tangle no :noweb-ref saveplace-settings
  (setq-default
   save-place-abbreviate-file-names t
   save-place-limit 800)
#+end_src

*** Bookmarks
Don't display bookmark icon in fringe.
#+begin_src elisp
  (with-eval-after-load 'bookmark
    (setq-default bookmark-fringe-mark nil))
#+end_src

Disable auto-bookmarking org-mode files.
#+begin_src elisp
  (with-eval-after-load 'org
    (setq-default org-bookmark-names-plist nil))
#+end_src

** Spell Checking
Set dictionary.
#+begin_src elisp
  (setq-default ispell-dictionary "british")
#+end_src

Enable spell checking.
#+begin_src elisp
  (add-hook 'text-mode-hook #'flyspell-mode)
  (add-hook 'prog-mode-hook #'flyspell-prog-mode)
#+end_src

Add add word to dictionary function.
#+begin_src elisp
  (defun +flyspell-add-word-to-dictionary ()
    "Save word at point to personal dictionary."
    (interactive)
    (when-let ((loc (point))
               (word (flyspell-get-word)))
      (when (yes-or-no-p
             (format "Add '%s' to dictionary?" (car word)))
        (flyspell-do-correct
         'save nil (car word) loc (cadr word) (caddr word) loc)
        (save-buffer)
        (revert-buffer-quick)
        (message "Added '%s' to personal dictionary" (car word)))))
#+end_src

Set custom spell checking keybindings.
#+begin_src elisp
  (setq-default flyspell-mode-map (make-sparse-keymap))
  (with-eval-after-load 'flyspell
    (keymap-set flyspell-mode-map "C-x c c" #'flyspell-auto-correct-word)
    (keymap-set flyspell-mode-map "C-x c u" #'flyspell-auto-correct-previous-word)
    (keymap-set flyspell-mode-map "C-x c l" #'flyspell-check-previous-highlighted-word)
    (keymap-set flyspell-mode-map "C-x c n" #'flyspell-goto-next-error)
    (keymap-set flyspell-mode-map "C-x c b" #'flyspell-buffer)
    (keymap-set flyspell-mode-map "C-x c d" #'ispell-change-dictionary)
    (keymap-set flyspell-mode-map "C-x c i" #'+flyspell-add-word-to-dictionary))
#+end_src

** Dired
#+begin_src elisp :noweb yes
  (with-eval-after-load 'dired
    <<dired-settings>>)
#+end_src

Dired settings.
#+begin_src elisp :tangle no :noweb-ref dired-settings
  (setq-default
   dired-guess-shell-alist-user '(("\\.pdf$" "zathura"))
   dired-listing-switched "-AFhlv --group-directories-first")
#+end_src

Auto enable omit mode on Dired startup.
#+begin_src elisp :tangle no :noweb-ref dired-settings
  (add-hook 'dired-mode-hook (lambda ()
                               (dired-omit-mode)
                               (toggle-truncate-lines 1)))
#+end_src

Add shred function.
#+begin_src elisp :tangle no :noweb-ref dired-settings
  (if (executable-find "shred")
      (defun +dired-shred-file ()
        "Shred marked files or a file at point in Dired."
        (interactive)
        (mapc (lambda (file) "Run the shred shell command on FILE."
                (if (file-regular-p file)
                    (when (yes-or-no-p (format "Shred %s?" file))
                      (shell-command (format "shred -u \"%s\"" file)))
                  (error "Aborting shred procedure; \"%s\" is not a file!" file)))
              (dired-get-marked-files)))
    (error "Shred command not found!"))
#+end_src

Add additional dired keybindings.
#+begin_src elisp :tangle no :noweb-ref dired-settings
  (keymap-set dired-mode-map "b" #'dired-up-directory)
  (keymap-set dired-mode-map "z" #'+dired-shred-file)
#+end_src

Allow changing file permissions when in a writable dired buffer.
#+begin_src elisp :tangle no :noweb-ref dired-settings
  (with-eval-after-load 'wdired
    (setq-default wdired-allow-to-change-permissions t))
#+end_src

** Search & Replace
Case-sensitive search by default and show match count in minibuffer.
#+begin_src elisp
  (with-eval-after-load 'isearch
    (setq-default
     case-fold-search nil
     isearch-lazy-count t))
#+end_src

** Org
#+begin_src elisp :noweb yes
  (with-eval-after-load 'org
    <<org-settings>>
    <<org-todo-tag-settings>>
    <<org-babel-settings>>
    <<org-export-settings>>)
#+end_src

#+begin_src elisp :noweb yes
  (with-eval-after-load 'org-keys
    <<org-speed-command-settings>>)
#+end_src

#+begin_src elisp :noweb yes
  (with-eval-after-load 'org-agenda
    <<org-agenda-settings>>)
#+end_src

*** Org Settings
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-settings
:END:

Hide emphasis markers and set ellipse symbol.
#+begin_src elisp
  (setq-default org-ellipsis "⤵"
                org-hide-emphasis-markers t)
#+end_src

Enable checkbox dependency checking.
#+begin_src elisp
  (setq-default org-enforce-todo-dependencies t
                org-enforce-todo-checkbox-dependencies t
                org-checkbox-hierarchical-statistics nil)
#+end_src

Set org column format.
#+begin_src elisp
  (setq-default org-columns-default-format
                "%70ITEM %TODO %10CLOCKSUM %16DEADLINE")
#+end_src

Enable notes for various actions.
#+begin_src elisp
  (setq-default org-log-done 'time
                org-log-reschedule 'note
                org-log-redeadline 'note
                org-log-into-drawer t
                org-log-note-clock-out t)
#+end_src

Prioritise attribute tags for image width.
#+begin_src elisp
  (setq-default org-image-actual-width nil)
#+end_src

Add advice to prompt for confirmation before commenting or cutting a subtree.
#+begin_src elisp
  (advice-add 'org-cut-subtree
              :before-while (lambda (&rest _)
                              "Prompts for confirmation before cutting subtree."
                              (let ((heading (org-entry-get nil "ITEM")))
                                (y-or-n-p (format "Cut \"%s\" subtree?" heading)))))

  (advice-add 'org-toggle-comment
              :before-while (lambda (&rest _)
                              "Prompt for confirmation before commenting a subtree."
                              (let ((heading (org-entry-get nil "ITEM")))
                                (y-or-n-p (format "Toggle comment on \"%s\" subtree?" heading)))))
#+end_src

Use custom IDs for links.
#+begin_src elisp
  (with-eval-after-load 'org-id
    (setq-default org-id-link-to-org-use-id
                  'create-if-interactive-and-no-custom-id))
#+end_src

*** Org To-dos & Tags
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-todo-tag-settings
:END:
Set to-do key words and selection type.
#+begin_src elisp
  (setq-default
   org-use-fast-todo-selection 'expert
   org-todo-keywords '((sequence "IDLE(i)" "TODO(t)" "LIVE(l)" "WAIT(w@/!)"
                                 "|" "AXED(a@)" "DONE(d)")))
#+end_src

Style keywords.
#+begin_src elisp
  (set-face-attribute 'org-todo nil :weight 'bold :slant 'italic)
  (setq-default
   org-todo-keyword-faces '(("IDLE"  . "grey")
                            ("TODO"  . "RoyalBlue1")
                            ("LIVE"  . "goldenrod2")
                            ("WAIT"  . "linen")
                            ("DONE"  . "SeaGreen3")
                            ("AXED"  . "OrangeRed2")))
#+end_src

Add no-export tag.
#+begin_src elisp
  (with-eval-after-load 'ox
    (cl-pushnew "NOEXPORT" org-export-exclude-tags))
#+end_src

Set tag list.
#+begin_src elisp
  (setq-default
   org-tag-alist '(;; Built-in Actions
                   ("ARCHIVE") ("NOEXPORT") ("ignore")

                   ;; General definitions
                   ("blog") ("crypt") ("emacs") ("mail") ("note") ("web")

                   ;; Code
                   (:startgroup)
                   ("code")
                   (:grouptags)
                   ("bash") ("c") ("cpp") ("css") ("elisp") ("html")
                   (:endgroup)

                   ;; Text
                   (:startgroup)
                   ("text")
                   (:grouptags)
                   ("article") ("book") ("man") ("pdf") ("txt") ("doc")
                   (:endgroup)

                   ;; Audio
                   (:startgroup)
                   ("audio")
                   (:grouptags)
                   ("audbook") ("music") ("podcast")
                   (:endgroup)

                   ;; Video
                   (:startgroup)
                   ("video")
                   (:grouptags)
                   ("movie") ("yt")
                   (:endgroup)))
#+end_src

*** Org Speed Command Keys
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-speed-command-settings
:END:

Enable org speed commands.
#+begin_src elisp
  (setq-default org-use-speed-commands t)
#+end_src

Alternative comment key =;= added to be consistent with ~org-toggle-comment~ (=C-c ;=).
#+begin_src elisp
  (dolist (key '(("P" . org-set-property)
                 ("$" . org-archive-subtree-default-with-confirmation)
                 ("q" . org-set-tags-command)
                 ("]" . org-shiftright)
                 ("[" . org-shiftleft)
                 (";" . org-toggle-comment)
                 ("z" . org-add-note)
                 ("y" . org-copy-subtree)))
    (cl-pushnew key org-speed-commands))
#+end_src

Add ='= shortcut key to edit source blocks, which is consistent with ~org-edit-special~ (=C-c '=).
#+begin_src elisp
  (cl-pushnew '("'" . org-edit-src-code) org-babel-key-bindings)
#+end_src

*** Org Babel
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-babel-settings
:END:

Add new structure template shortcuts when inserting a block.
#+begin_src elisp
  (cl-pushnew '("se" . "src elisp") org-structure-template-alist)
#+end_src

Add advice to automatically open an edit buffer when inserting a structure template.
#+begin_src elisp
  (defadvice org-insert-structure-template
      (after edit-src activate compile)
    "Auto enter an edit buffer when inserted an Org block."
    (call-interactively 'org-edit-special))
#+end_src

Enable supported org babel languages.
#+begin_src elisp
  (dolist (lang '(shell C latex plantuml))
    (cl-pushnew `(,lang . t) org-babel-load-languages))
#+end_src

Redisplay images when executing an org block.
#+begin_src elisp
  (with-eval-after-load 'ob-core
    (add-hook 'org-babel-after-execute-hook
              (lambda () "Redisplay Org inline images."
                (when org-inline-image-overlays
                  (org-redisplay-inline-images)))))
#+end_src

*** Org Export
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-export-settings
:END:

Use SVG LaTeX previews.
#+begin_src elisp
  (setq-default org-preview-latex-default-process 'dvisvgm)
  (with-eval-after-load 'ox-html
    (setq-default org-html-with-latex 'dvisvgm))
#+end_src


Set [[https://ctan.org/pkg/hyperref][hyperref]] LaTeX settings.
#+begin_src elisp
  (with-eval-after-load 'ox-latex
    (setq-default org-latex-hyperref-template
   "\\hypersetup{
     pdfauthor={%a},
     pdftitle={%t},
     pdfkeywords={%k},
     pdfsubject={%d},
     pdfcreator={%c},
     pdflang={%L},
     linktoc=all,
     colorlinks=true,
     urlcolor=blue,
     citecolor=blue,
     linkcolor=blue
    }
    ")
    )
#+end_src

Add =doc= LaTeX class.
#+begin_src elisp
  (with-eval-after-load 'ox-latex
    (cl-pushnew
     '("doc"
       "
  % Document Type
  \\documentclass[11pt]{article}

  % Geometry
  \\usepackage[a4paper,margin=1in]{geometry}

  % Paraskip
  \\usepackage{parskip}
  \\setlength{\\parindent}{0em}
  \\setlength{\\parskip}{1em}

  % Line height
  \\renewcommand{\\baselinestretch}{1.2}

  % Fancyhdr (header/footer)
  \\usepackage{fancyhdr}
  \\pagestyle{fancy}
  \\fancyhead[LH,LH]{\\scriptsize\\leftmark}
  \\fancyhead[RH,RH]{\\scriptsize\\rightmark}
  \\fancyfoot[CF]{\\thepage}
  \\fancyfootoffset{\\pagewidth}
  \\renewcommand{\\headrulewidth}{0.5pt} % top line thickness
  \\renewcommand{\\footrulewidth}{0.5pt} % bottom line thickness
  \\renewcommand{\\headruleskip}{10pt}   % top line padding
  \\renewcommand{\\footruleskip}{10pt}    % bottom line padding
  "
       ("\\section{%s}" . "\\section*{%s}")
       ("\\subsection{%s}" . "\\subsection*{%s}")
       ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
       ("\\paragraph{%s}" . "\\paragraph*{%s}")
       ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
     org-latex-classes)
    )
#+end_src

*** Org Habit
#+begin_src elisp
  (with-eval-after-load "org-habit"
    (setq-default
     org-habit-today-glyph ?T
     org-habit-completed-glyph ?+))
#+end_src

*** Org Agenda
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-agenda-settings
:END:

Match encrypted org files for agenda.
#+begin_src elisp
  (setq-default org-agenda-file-regexp "^[^.#].+\\.org\\(?:\\.gpg\\)?$")
#+end_src

Set agenda directory location and add files to agenda.
#+begin_src elisp
  (let ((dir (expand-file-name "agenda/" org-directory)))
    (if (file-exists-p dir)
        (setq-default org-agenda-files (directory-files-recursively
                                        dir org-agenda-file-regexp))
      (warn "Org-agenda directory '%s' not found" dir)))
#+end_src

Set agenda header formats.
#+begin_src elisp
  (setq-default
   org-agenda-prefix-format '((agenda . "%?2i%-5c%?t%s\s")
                              (todo . "%?2i%-5c")
                              (tags . "⬜ %?2i%-5c")
                              (search . "%?2i%-5c"))
   org-agenda-deadline-leaders '("!" "In %2d d.:" "[!%2dx]")
   org-agenda-scheduled-leaders '("+" "[+%2dx]")
   org-agenda-format-date "%F %A")
#+end_src

Set bulk actions and marker.
#+begin_src elisp
  (setq-default
   org-agenda-bulk-custom-functions '((?k org-agenda-kill))
   org-agenda-bulk-mark-char "☑️")
#+end_src

Set priority faces.
#+begin_src elisp
  (setq-default org-priority-faces
                '((?A . (:foreground "red" :slant italic))
                  (?B . (:foreground "cadetblue" :slant italic))
                  (?C . (:foreground "goldenrod" :slant italic))))
#+end_src

Set face for to-dos in agenda view.
#+begin_src elisp
  (set-face-attribute
   'org-agenda-dimmed-todo-face nil
   :weight 'bold
   :inherit nil
   :background 'unspecified)
#+end_src

Set sorting strategy.
#+begin_src elisp
  (setq-default
   org-agenda-sorting-strategy
   '((agenda
      deadline-up
      time-up
      habit-down
      priority-up
      category-up)
     (todo
      todo-state-down
      deadline-up
      scheduled-up
      priority-down
      category-keep)
     (tags
      todo-state-down
      priority-down
      category-keep)
     (search
      category-keep)))
#+end_src

Set time grid.
#+begin_src elisp
  (setq-default
   org-agenda-time-grid
   '((daily today require-timed)
     (0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100
      1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300)
     "⏰" "——————————————————————————————"))
#+end_src

**** Org Agenda Commands
Command to view to personal planner.
#+begin_src elisp
  (cl-pushnew '("=" "Day Planner: Personal"
                ((agenda "" ((org-agenda-overriding-header "PERSONAL AGENDA:")
                             (org-agenda-span 'day)
                             (org-agenda-include-deadlines nil)
                             (org-agenda-show-all-dates nil)))

                 (agenda "" ((org-agenda-overriding-header "\nPERSONAL DEADLINES:")
                             (org-agenda-span 'day)
                             (org-agenda-format-date "%F %A")
                             (org-agenda-entry-types '(:deadline))
                             (org-agenda-skip-deadline-if-done t)))

                 (tags-todo "-goal/TODO" ((org-agenda-overriding-header "\nPERSONAL TASKS:"))))

                ((org-habit-show-habits nil)
                 (org-agenda-include-diary nil)
                 (org-agenda-use-time-grid nil)
                 (org-agenda-block-separator nil)
                 (org-agenda-category-filter-preset '("-Work"))))
              org-agenda-custom-commands)
#+end_src

Command to view work planner.
#+begin_src elisp
  (cl-pushnew '("-" "Day Planner: Work"
                ((agenda "" ((org-agenda-overriding-header "WORK AGENDA:")
                             (org-agenda-start-day "monday")
                             (org-agenda-span 5)
                             (org-agenda-include-deadlines nil)
                             (org-agenda-show-all-dates nil)
                             (org-habit-show-habits nil)))

                 (agenda "" ((org-agenda-overriding-header "\nWORK DEADLINES:")
                             (org-agenda-span 'day)
                             (org-agenda-time-grid nil)
                             (org-agenda-format-date "%F %A")
                             (org-agenda-entry-types '(:deadline))
                             (org-agenda-skip-deadline-if-done t)))

                 (alltodo "" ((org-agenda-overriding-header "\nWORK TASKS:"))))

                ((org-agenda-block-separator nil)
                 (org-agenda-category-filter-preset '("+Work"))))
              org-agenda-custom-commands)
#+end_src

Command to view all personal tasks.
#+begin_src elisp
  (cl-pushnew '("l" "All Personal Tasks"
                tags-todo "-goal-milestone"
                ((org-agenda-overriding-header "PERSONAL TASKS:")
                 (org-agenda-category-filter-preset '("-Work"))))
              org-agenda-custom-commands)
#+end_src

Command to view all work tasks.
#+begin_src elisp
  (cl-pushnew '("k" "All Work Related Tasks"
                todo ""
                ((org-agenda-overriding-header "WORK TASKS:")
                 (org-agenda-category-filter-preset '("+Work"))))
              org-agenda-custom-commands)
#+end_src

Command to organise idle tasks.
#+begin_src elisp
  (cl-pushnew '("o" "Organise Tasks"
                todo "IDLE"
                ((org-agenda-overriding-header "TASKS TO ORGANISE:")))
              org-agenda-custom-commands)
#+end_src

Command to view tasks that require archiving.
#+begin_src elisp
  (cl-pushnew '("$" "Tasks to Archive"
                tags "CLOSED<=\"<-3m>\"+CATEGORY={Task}/DONE|AXED"
                ((org-agenda-show-inherited-tags nil)
                 (org-agenda-todo-list-sublevels nil)
                 (org-agenda-search-view-max-outline-level 1)
                 (org-agenda-overriding-header "PERSONAL TASKS TO ARCHIVE")))
              org-agenda-custom-commands)
#+end_src

Command to view habits.
#+begin_src elisp
  (cl-pushnew '("h" "Habits"
                tags-todo "STYLE=\"habit\""
                ((org-agenda-overriding-header "HABITS:")))
              org-agenda-custom-commands)
#+end_src

Command to view projects.
#+begin_src elisp
  (cl-pushnew
   '("p" "Projects"
     ((tags-todo "+proj|+goal|+milestone"
                 ((org-agenda-overriding-header "PROJECTS:")))
      (tags-todo "-proj-goal-milestone"
                 ((org-agenda-overriding-header "\nPROJECT TASKS:"))))
     ((org-agenda-prefix-format "⬜ %?2i%-5c%?t%?s%(+org-agenda-breadcrumb)")
      (org-agenda-compact-blocks t)
      (org-agenda-category-filter-preset +project-categories)
      (org-agenda-sorting-strategy
       '(category-up deadline-up time-up priority-down effort-up))))
   org-agenda-custom-commands)
#+end_src

Command to view clock report.
#+begin_src elisp
  (cl-pushnew '("c" "Clock Review"
                agenda ""
                ((org-agenda-span 'day)
                 (org-agenda-prefix-format " %-5c | %t | %s | ")
                 (org-agenda-archives-mode t)
                 (org-agenda-use-time-grid nil)
                 (org-agenda-start-with-log-mode 'clockcheck)
                 (org-agenda-start-with-clockreport-mode t)
                 (org-agenda-clock-consistency-checks
                  '(:min-duration 0
                    :max-gap 5
                    :inherit 'warning
                    :default-face ((:background 'unspecified)
                                   (:family "monospace"))))))
              org-agenda-custom-commands)
#+end_src

Command to review the week.
#+begin_src elisp
  (cl-pushnew '("r" "Review: Week"
                agenda ""
                ((org-agenda-overriding-header
                  (format "WEEK %s REVIEW"
                          (format-time-string "%U" (current-time))))
                 (org-habit-show-habits nil)
                 (org-agenda-span 'week)
                 (org-agenda-include-diary nil)
                 (org-agenda-show-all-dates t)
                 (org-agenda-clockreport-mode t)))
              org-agenda-custom-commands)
#+end_src

Command to review the month.
#+begin_src elisp
  (cl-pushnew '("R" "Review: Month"
                agenda ""
                ((org-agenda-overriding-header
                  (format "%s REVIEW"
                          (upcase (format-time-string "%B" (current-time)))))
                 (org-habit-show-habits nil)
                 (org-agenda-span 'month)
                 (org-agenda-include-diary nil)
                 (org-agenda-show-all-dates t)
                 (org-agenda-start-with-clockreport-mode t)))
              org-agenda-custom-commands)
#+end_src

Command to review the weekend.
#+begin_src elisp
  (cl-pushnew '("w" "Review: Weekend"
                agenda ""
                ((org-agenda-overriding-header "WEEKEND REVIEW")
                 (org-agenda-span 2)
                 (org-agenda-start-day "saturday")))
              org-agenda-custom-commands)
#+end_src
*** Org Clock-table
Define a custom clocktable formatter function for ~+org-clocktable-format~.
#+begin_src elisp
  (with-eval-after-load 'org-clock
    (defun +org-clocktable-format (&rest args)
      "A cleaner Org clocktable format."
      (apply #'org-clocktable-write-default args)
      (save-excursion
        ;; Rename headline
        (search-forward "Headline")
        (backward-kill-sexp)
        (insert "Tasks")
        (org-table-align)

        ;; Capitalise row
        (beginning-of-line)
        (setq this-command-keys-shift-translated t)
        (call-interactively 'end-of-line)
        (call-interactively 'capitalize-dwim)
        (deactivate-mark)

        ;; Remove cookies
        (org-mark-element)
        (while (re-search-forward
                "\\[[0-9]+\\(?:/[0-9]\\|%\\)\\] " nil t)
          (replace-match ""))
        (org-table-align)
        (exchange-point-and-mark t)

        ;; Move total time row to the end of the table
        (kill-whole-line)
        (condition-case nil
            (while t
              (org-table-move-row-down))
          (error nil))
        (org-table-insert-hline t))))
#+end_src

Set default clocktable parameters.
#+begin_src elisp :tangle no :noweb-ref org-agenda-settings
  (setq-default
   org-agenda-clockreport-parameter-plist
   '(:link t :fileskip0 t :hidefiles t :formatter +org-clocktable-format))
#+end_src

*** Org Capture
#+begin_src elisp :noweb yes
  (with-eval-after-load 'org-capture
    <<org-capture-quick-keys>>
    <<org-capture-personal-keys>>)
#+end_src

**** Capture Templates
Task template.
#+begin_src elisp :tangle no :noweb-ref capture-task-template
  "* IDLE %^{Task} %^G
  :PROPERTIES:
  :CAPTURED: %U
  :END:"
#+end_src

Event template.
#+begin_src elisp :tangle no :noweb-ref capture-event-template
  "* %^{Event}
  SCHEDULED: %^T
  :PROPERTIES:
  :CAPTURED: %U
  :END:"
#+end_src

Note template.
#+begin_src elisp :tangle no :noweb-ref capture-note-template
  "* %^{Note} %^G
  :PROPERTIES:
  :CAPTURED: %U
  :END:"
#+end_src

Meeting template.
#+begin_src elisp :tangle no :noweb-ref capture-meeting-template
  "* TODO Meeting with: *%\\1* at *%\\2*                                       :meeting:
  SCHEDULED: %^T
  :PROPERTIES:
  :CAPTURED: %U
  :NAME: %^{Name}
  :LOCATION: %^{Location}
  :END:"
#+end_src

Goal setting template.
#+begin_src elisp :tangle no :noweb-ref capture-goal-template
  "* [/] %^{Goal Title}                                                           :goal:
  DEADLINE: %^{When do you expect this goal to be completed?}t
  :PROPERTIES:
  :CAPTURED: %U
  :END:

  :SMART:
  :SPECIFIC: %^{What SPECIFICALLY is the goal?}
  :MEASURABLE: %^{What RESULTS will determine the completion of the goal?}
  :ACTIONABLE: %^{What ACTIONS will you take to accomplish this goal?}
  :RELEVANT: %^{Why is it IMPORTANT to accomplish this goal?}
  :TIMELY: Due by =DEADLINE=
  :END:"
#+end_src

Daily review template.
#+begin_src elisp :tangle no :noweb-ref capture-weekly-review-template
  ":PROPERTIES:
   :CAPTURED: %U
   :END:
   %?
   ,,#+BEGIN: clocktable :scope agenda-with-archives :block %t
   ,,#+END:"
#+end_src

Weekly review template.
#+begin_src elisp :tangle no :noweb-ref capture-weekly-review-template
  ":PROPERTIES:
   :CAPTURED: %U
   :END:
   %?
   ,,#+BEGIN: clocktable :scope agenda-with-archives :block %<%Y>-W%<%V>
   ,,#+END:"
#+end_src

Monthly review template.
#+begin_src elisp :tangle no :noweb-ref capture-monthly-review-template
  ":PROPERTIES:
   :CAPTURED: %U
   :END:
   %?
   ,,#+BEGIN: clocktable :scope agenda-with-archives :block %<%Y-%m>
   ,,#+END:"
#+end_src

**** Capture Template Quick Keys
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-capture-quick-keys :noweb yes :noweb-prefix no
:END:

Capture a quick task.
#+begin_src elisp :noweb yes
  (cl-pushnew
   '("c" "Quick Task (personal)" entry
     (file "agenda/tasks.org")
     <<capture-task-template>>
     :prepend t
     :empty-lines-after 1
     :immediate-finish t)
   org-capture-templates)
#+end_src

Capture event.
#+begin_src elisp
  (cl-pushnew
   '("v" "Event" entry
     (file "agenda/events.org")
     <<capture-event>>
     :prepend t
     :empty-lines-after 1
     :immediate-finish t)
   org-capture-templates)
#+end_src

Captured to last clocked file.
#+begin_src elisp
  (cl-pushnew
   '("l" "Clocked File" item (clock) nil)
   org-capture-templates)
#+end_src

**** Capture Template Personal Keys
:PROPERTIES:
:header-args:elisp: :tangle no :noweb-ref org-capture-personal-keys :noweb yes :noweb-prefix no
:END:

Personal capture templates.
#+begin_src elisp
  (cl-pushnew '("p" "personal...") org-capture-templates)

  (cl-pushnew
   '("pt" "Task" entry
     (file "agenda/tasks.org")
     <<capture-task-template>>
     :prepend t
     :empty-lines-after 1
     :immediate-finish t)
   org-capture-templates)

  (cl-pushnew
   '("pT" "Detailed Task" entry
     (file "agenda/tasks.org")
     <<capture-task-template>>
     :prepend t
     :empty-lines-after 1)
   org-capture-templates)

  (cl-pushnew
   '("pp" "Plan Today" checkitem
     (file+olp+datetree "agenda/planner.org")
     nil
     :empty-lines-after 1
     :jump-to-captured t)
   org-capture-templates)

  (cl-pushnew
   '("pn" "Note" entry (file "notes/notes.org")
     <<capture-note-template>>
     :empty-lines-after 1)
   org-capture-templates)

  (cl-pushnew
   '("pe" "Meeting" entry
     (file "agenda/tasks.org")
     <<capture-meeting-template>>
     :prepend t
     :empty-lines-after 1)
   org-capture-templates)
#+end_src

Review captures.
#+begin_src elisp
  (cl-pushnew '("pr" "Review") org-capture-templates)

  (cl-pushnew
   '("prd" "Daily Review" plain
     (file+olp+datetree "agenda/planner.org" "Reviews" "Daily")
     <<capture-daily-review-template>>
     :time-prompt t
     :empty-lines-after 1)
   org-capture-templates)

  (cl-pushnew
   '("prw" "Weekly Review" plain
     (file+olp+datetree "agenda/planner.org" "Reviews" "Weekly")
     <<capture-weekly-review-template>>
     :time-prompt t
     :tree-type week
     :jump-to-captured t
     :empty-lines-after 1)
   org-capture-templates)

  (cl-pushnew
   '("prm" "Monthly Review" plain
     (file+olp+datetree "agenda/planner.org" "Reviews" "Monthly")
     <<capture-monthly-review-template>>
     :time-prompt t
     :tree-type month
     :jump-to-captured t
     :empty-lines-after 1)
   org-capture-templates)
#+end_src

** Error Checking
Enable flymake for programming modes.
#+begin_src elisp
  (add-hook 'prog-mode-hook #'flymake-mode)
#+end_src

Set flymake keybindings.
#+begin_src elisp
  (with-eval-after-load 'flymake
    (keymap-set flymake-mode-map "M-# #" #'flymake-show-buffer-diagnostics)
    (keymap-set flymake-mode-map "M-# M-#" #'flymake-show-project-diagnostics)
    (keymap-set flymake-mode-map "M-# M-]" #'flymake-goto-next-error)
    (keymap-set flymake-mode-map "M-# M-[" #'flymake-goto-prev-error))
#+end_src

* Keybindings
Unlock previously unusable keybinding.
#+begin_src elisp
  (define-key input-decode-map [?\C-\[] (kbd "<C-[>"))
#+end_src

** Global Keybindings
To prevent other packages overriding any custom global keybinding, all custom global keybinding are stored in a global minor mode.
#+begin_src elisp
  (define-minor-mode +global-keys
    "Minor to store my custom global keybindings."
    :global t
    :lighter " +GKEYS"
    :keymap (make-sparse-keymap))

  (+global-keys)
#+end_src

File actions.
#+begin_src elisp
  (keymap-set +global-keys-map "C-x x R" #'rename-visited-file)
  (keymap-set +global-keys-map "C-x x D" #'delete-file)
#+end_src

Window actions.
#+begin_src elisp
  (keymap-set +global-keys-map "M-o" #'other-window)
  (keymap-set +global-keys-map "M-O" #'window-swap-states)
  (keymap-set +global-keys-map "M-V" #'scroll-other-window-down)
  (keymap-set +global-keys-map "C-S-V" #'scroll-other-window)
  (keymap-set +global-keys-map "C-M-<" #'beginning-of-buffer-other-window)
  (keymap-set +global-keys-map "C-M->" #'end-of-buffer-other-window)
  (keymap-set +global-keys-map "C-M-]" #'next-buffer)
  (keymap-set +global-keys-map "M-ESC" #'previous-buffer) ; C-M-[ translates to M-ESC
#+end_src

Set meta-key quick actions to mirror =C-x DIGIT= bindings, therefore reducing the need for additional keypresses.
These bindings override their corresponding numerical argument, however these can be can be alternatively called with =C-u DIGIT= or =C-DIGIT=.
#+begin_src elisp
  (keymap-set +global-keys-map "C-M-0" #'kill-buffer-and-window)
  (keymap-set +global-keys-map "C-M--" #'kill-this-buffer)
  (keymap-set +global-keys-map "M-0" #'delete-window)
  (keymap-set +global-keys-map "M-1" #'delete-other-windows)
  (keymap-set +global-keys-map "M-2" #'split-window-below)
  (keymap-set +global-keys-map "M-3" #'split-window-right)
  (keymap-set +global-keys-map "M-4" #'ctl-x-4-prefix)
  (keymap-set +global-keys-map "M-5" #'ctl-x-5-prefix)
  (keymap-set +global-keys-map "M-6" (keymap-global-lookup "C-x 6"))
  (keymap-set +global-keys-map "M-7" (keymap-global-lookup "C-x 7"))
  (keymap-set +global-keys-map "M-8" (keymap-global-lookup "C-x 8"))
  (keymap-set +global-keys-map "M-9" (keymap-global-lookup "C-x 9"))
#+end_src

Tab actions.
#+begin_src elisp
  (keymap-set +global-keys-map "C-x C-<tab>" #'tab-new)
  (keymap-set +global-keys-map "C-x C-<backspace>" #'tab-close)
  (keymap-set +global-keys-map "C-x t l" #'tab-list)
  (keymap-set +global-keys-map "C-x t <tab>" #'toggle-frame-tab-bar)
#+end_src

Improve region text manipulation.
#+begin_src elisp
  (keymap-set +global-keys-map "M-c" #'capitalize-dwim)
  (keymap-set +global-keys-map "M-l" #'downcase-dwim)
  (keymap-set +global-keys-map "M-u" #'upcase-dwim)
  (keymap-set +global-keys-map "M-U" #'upcase-char)
#+end_src

Help actions.
#+begin_src elisp
  (keymap-set +global-keys-map "C-h M" #'describe-keymap)
  (keymap-set +global-keys-map "C-h j" #'describe-char)
#+end_src

Display modes.
#+begin_src elisp
  (keymap-set +global-keys-map "C-x x c" #'display-fill-column-indicator-mode)
  (keymap-set +global-keys-map "C-x x l" #'display-line-numbers-mode)
  (keymap-set +global-keys-map "C-x x h" #'hl-line-mode)
  (keymap-set +global-keys-map "C-x x o" #'overwrite-mode)
  (keymap-set +global-keys-map "C-x x s" #'prettify-symbols-mode)
  (keymap-set +global-keys-map "C-x x w" #'visual-line-mode)
  (keymap-set +global-keys-map "C-x x SPC" #'whitespace-mode)
#+end_src

Org functions.
#+begin_src elisp
  (keymap-set +global-keys-map "C-c a" #'org-agenda)
#+end_src
** Diff-mode
Rebind diff-mode's ~diff-goto-source~ keybinding (due to conflict with =M-o=).
Add version control next action shortcut in diff-mode buffer.
#+begin_src elisp
  (with-eval-after-load 'diff-mode
    (keymap-set diff-mode-map "M-j" #'diff-goto-source)
    (keymap-set diff-mode-map "v" #'vc-next-action))
#+end_src