213 lines
11 KiB
EmacsLisp
213 lines
11 KiB
EmacsLisp
;;; ui/ligatures/config.el -*- lexical-binding: t; -*-
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(defvar +ligatures-extra-symbols
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'(;; org
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:name "»"
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:src_block "»"
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:src_block_end "«"
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:quote "“"
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:quote_end "”"
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;; Functional
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:lambda "λ"
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:def "ƒ"
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:composition "∘"
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:map "↦"
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;; Types
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:null "∅"
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:true "𝕋"
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:false "𝔽"
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:int "ℤ"
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:float "ℝ"
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:str "𝕊"
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:bool "𝔹"
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:list "𝕃"
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;; Flow
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:not "￢"
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:in "∈"
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:not-in "∉"
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:and "∧"
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:or "∨"
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:for "∀"
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:some "∃"
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:return "⟼"
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:yield "⟻"
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;; Other
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:union "⋃"
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:intersect "∩"
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:diff "∖"
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:tuple "⨂"
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:pipe "" ;; FIXME: find a non-private char
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:dot "•")
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"Maps identifiers to symbols, recognized by `set-ligatures'.
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This should not contain any symbols from the Unicode Private Area! There is no
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universal way of getting the correct symbol as that area varies from font to
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font.")
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(defvar +ligatures-extra-alist '((t))
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"A map of major modes to symbol lists (for `prettify-symbols-alist').")
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(defvar +ligatures-composition-alist
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'((?! . "\\(?:!\\(?:==\\|[!=]\\)\\)") ; (regexp-opt '("!!" "!=" "!=="))
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(?# . "\\(?:#\\(?:###?\\|_(\\|[#(:=?[_{]\\)\\)") ; (regexp-opt '("##" "###" "####" "#(" "#:" "#=" "#?" "#[" "#_" "#_(" "#{"))
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(?$ . "\\(?:\\$>>?\\)") ; (regexp-opt '("$>" "$>>"))
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(?% . "\\(?:%%%?\\)") ; (regexp-opt '("%%" "%%%"))
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(?& . "\\(?:&&&?\\)") ; (regexp-opt '("&&" "&&&"))
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(?* . "\\(?:\\*\\(?:\\*[*/]\\|[)*/>]\\)?\\)") ; (regexp-opt '("*" "**" "***" "**/" "*/" "*>" "*)"))
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(?+ . "\\(?:\\+\\(?:\\+\\+\\|[+:>]\\)?\\)") ; (regexp-opt '("+" "++" "+++" "+>" "+:"))
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(?- . "\\(?:-\\(?:-\\(?:->\\|[>-]\\)\\|<[<-]\\|>[>-]\\|[:<>|}~-]\\)\\)") ; (regexp-opt '("--" "---" "-->" "--->" "->-" "-<" "-<-" "-<<" "->" "->>" "-}" "-~" "-:" "-|"))
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(?. . "\\(?:\\.\\(?:\\.[.<]\\|[.=>-]\\)\\)") ; (regexp-opt '(".-" ".." "..." "..<" ".=" ".>"))
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(?/ . "\\(?:/\\(?:\\*\\*\\|//\\|==\\|[*/=>]\\)\\)") ; (regexp-opt '("/*" "/**" "//" "///" "/=" "/==" "/>"))
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(?: . "\\(?::\\(?:::\\|[+:<=>]\\)?\\)") ; (regexp-opt '(":" "::" ":::" ":=" ":<" ":=" ":>" ":+"))
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(?\; . ";;") ; (regexp-opt '(";;"))
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(?0 . "0\\(?:\\(x[a-fA-F0-9]\\).?\\)") ; Tries to match the x in 0xDEADBEEF
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;; (?x . "x") ; Also tries to match the x in 0xDEADBEEF
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;; (regexp-opt '("<!--" "<$" "<$>" "<*" "<*>" "<**>" "<+" "<+>" "<-" "<--" "<---" "<->" "<-->" "<--->" "</" "</>" "<<" "<<-" "<<<" "<<=" "<=" "<=<" "<==" "<=>" "<===>" "<>" "<|" "<|>" "<~" "<~~" "<." "<.>" "<..>"))
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(?< . "\\(?:<\\(?:!--\\|\\$>\\|\\*\\(?:\\*?>\\)\\|\\+>\\|-\\(?:-\\(?:->\\|[>-]\\)\\|[>-]\\)\\|\\.\\(?:\\.?>\\)\\|/>\\|<[<=-]\\|=\\(?:==>\\|[<=>]\\)\\||>\\|~~\\|[$*+./<=>|~-]\\)\\)")
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(?= . "\\(?:=\\(?:/=\\|:=\\|<<\\|=[=>]\\|>>\\|[=>]\\)\\)") ; (regexp-opt '("=/=" "=:=" "=<<" "==" "===" "==>" "=>" "=>>"))
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(?> . "\\(?:>\\(?:->\\|=>\\|>[=>-]\\|[:=>-]\\)\\)") ; (regexp-opt '(">-" ">->" ">:" ">=" ">=>" ">>" ">>-" ">>=" ">>>"))
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(?? . "\\(?:\\?[.:=?]\\)") ; (regexp-opt '("??" "?." "?:" "?="))
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(?\[ . "\\(?:\\[\\(?:|]\\|[]|]\\)\\)") ; (regexp-opt '("[]" "[|]" "[|"))
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(?\\ . "\\(?:\\\\\\\\[\\n]?\\)") ; (regexp-opt '("\\\\" "\\\\\\" "\\\\n"))
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(?^ . "\\(?:\\^==?\\)") ; (regexp-opt '("^=" "^=="))
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(?w . "\\(?:wwww?\\)") ; (regexp-opt '("www" "wwww"))
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(?{ . "\\(?:{\\(?:|\\(?:|}\\|[|}]\\)\\|[|-]\\)\\)") ; (regexp-opt '("{-" "{|" "{||" "{|}" "{||}"))
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(?| . "\\(?:|\\(?:->\\|=>\\||=\\|[]=>|}-]\\)\\)") ; (regexp-opt '("|=" "|>" "||" "||=" "|->" "|=>" "|]" "|}" "|-"))
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(?_ . "\\(?:_\\(?:|?_\\)\\)") ; (regexp-opt '("_|_" "__"))
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(?\( . "\\(?:(\\*\\)") ; (regexp-opt '("(*"))
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(?~ . "\\(?:~\\(?:~>\\|[=>@~-]\\)\\)")) ; (regexp-opt '("~-" "~=" "~>" "~@" "~~" "~~>"))
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"An alist of all ligatures used by `+ligatures-extras-in-modes'.
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The car is the character ASCII number, cdr is a regex which will call
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`font-shape-gstring' when matched.
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Because of the underlying code in :ui ligatures module, the regex should match a
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string starting with the character contained in car.
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This variable is used only if you built Emacs with Harfbuzz on a version >= 28")
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(defvar +ligatures-in-modes
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'(not special-mode comint-mode eshell-mode term-mode vterm-mode)
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"List of major modes where ligatures should be enabled.
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If t, enable it everywhere (except `fundamental-mode').
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If the first element is 'not, enable it in any mode besides what is listed.
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If nil, don't enable ligatures anywhere.")
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(defvar +ligatures-extras-in-modes t
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"List of major modes where extra ligatures should be enabled.
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Extra ligatures are mode-specific substituions, defined in
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`+ligatures-extra-symbols' and assigned with `set-ligatures!'. This variable
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controls where these are enabled.
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If t, enable it everywhere (except `fundamental-mode').
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If the first element is 'not, enable it in any mode besides what is listed.
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If nil, don't enable these extra ligatures anywhere (though it's more
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efficient to remove the `+extra' flag from the :ui ligatures module instead).")
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(defvar +ligatures--init-font-hook nil)
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(defun +ligatures--correct-symbol-bounds (ligature-alist)
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"Prepend non-breaking spaces to a ligature.
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This way `compose-region' (called by `prettify-symbols-mode') will use the
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correct width of the symbols instead of the width measured by `char-width'."
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(let ((len (length (car ligature-alist)))
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(acc (list (cdr ligature-alist))))
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(while (> len 1)
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(setq acc (cons #X00a0 (cons '(Br . Bl) acc))
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len (1- len)))
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(cons (car ligature-alist) acc)))
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(defun +ligatures--enable-p (modes)
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"Return t if ligatures should be enabled in this buffer depending on MODES."
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(unless (eq major-mode 'fundamental-mode)
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(or (eq modes t)
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(if (eq (car modes) 'not)
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(not (apply #'derived-mode-p (cdr modes)))
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(apply #'derived-mode-p modes)))))
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(defun +ligatures-init-buffer-h ()
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"Set up ligatures for the current buffer.
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Extra ligatures are mode-specific substituions, defined in
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`+ligatures-extra-symbols', assigned with `set-ligatures!', and made possible
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with `prettify-symbols-mode'. This variable controls where these are enabled.
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See `+ligatures-extras-in-modes' to control what major modes this function can
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and cannot run in."
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(when after-init-time
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(when (+ligatures--enable-p +ligatures-in-modes)
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(if (boundp '+ligature--composition-table)
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(setq-local composition-function-table +ligature--composition-table)
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(run-hooks '+ligatures--init-font-hook)
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(setq +ligatures--init-font-hook nil)))
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(when (and (featurep! +extra)
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(+ligatures--enable-p +ligatures-extras-in-modes))
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(prependq! prettify-symbols-alist (alist-get major-mode +ligatures-extra-alist)))
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(when prettify-symbols-alist
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(if prettify-symbols-mode (prettify-symbols-mode -1))
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(prettify-symbols-mode +1))))
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;;
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;;; Bootstrap
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;;;###package prettify-symbols
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;; When you get to the right edge, it goes back to how it normally prints
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(setq prettify-symbols-unprettify-at-point 'right-edge)
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(add-hook! 'doom-init-ui-hook :append
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(defun +ligatures-init-h ()
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(add-hook 'after-change-major-mode-hook #'+ligatures-init-buffer-h)))
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(cond
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;; The emacs-mac build of Emacs appears to have built-in support for ligatures,
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;; using the same composition-function-table method
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;; https://bitbucket.org/mituharu/emacs-mac/src/26c8fd9920db9d34ae8f78bceaec714230824dac/lisp/term/mac-win.el?at=master#lines-345:805
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;; so use that instead if this module is enabled.
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((and IS-MAC (fboundp 'mac-auto-operator-composition-mode))
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(add-hook 'doom-init-ui-hook #'mac-auto-operator-composition-mode 'append))
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;; Harfbuzz and Mac builds do not need font-specific ligature support
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;; if they are above emacs-27.
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((and EMACS28+
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(or (featurep 'ns)
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(string-match-p "HARFBUZZ" system-configuration-features))
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(featurep 'composite)) ; Emacs loads `composite' at startup
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(defvar +ligature--composition-table (make-char-table nil))
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(add-hook! 'doom-init-ui-hook :append
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(defun +ligature-init-composition-table-h ()
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(dolist (char-regexp +ligatures-composition-alist)
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(set-char-table-range
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+ligature--composition-table
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(car char-regexp) `([,(cdr char-regexp) 0 font-shape-gstring])))
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(set-char-table-parent +ligature--composition-table composition-function-table)
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(add-hook 'after-change-major-mode-hook #'+ligatures-init-buffer-composition-table-h))))
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;; Fallback ligature support for certain, patched fonts. Install them with
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;; `+ligatures/install-patched-font'
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((defmacro +ligatures--def-font (id font-plist &rest alist)
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(declare (indent 2))
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(let ((alist-var (intern (format "+ligatures-%s-font-alist" id)))
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(setup-fn (intern (format "+ligatures-init-%s-font-h" id))))
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`(progn
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(setf (alist-get ',id +ligatures--font-alist) (list ,@font-plist))
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(defvar ,alist-var ',alist ,(format "Name of the %s ligature font." id))
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(defun ,setup-fn (&rest _)
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(cl-destructuring-bind (name &key _url files range)
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(or (alist-get ',id +ligatures--font-alist)
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(error "No ligature font called %s" ',id))
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(when range
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(set-fontset-font t range name nil 'prepend))
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(setq-default prettify-symbols-alist
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(append (default-value 'prettify-symbols-alist)
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(mapcar #'+ligatures--correct-symbol-bounds ,alist-var)))))
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(add-hook '+ligatures--init-font-hook #',setup-fn))))
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(defvar +ligatures--font-alist ())
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(cond ((featurep! +fira) (load! "+fira"))
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((featurep! +iosevka) (load! "+iosevka"))
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((featurep! +hasklig) (load! "+hasklig"))
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((featurep! +pragmata-pro) (load! "+pragmata-pro")))))
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