5331a28533
Occurs when unsetting pretty symbols for a mode with (set-pretty-symbols! 'some-mode nil), because of a forgotten loop and let-var.
107 lines
3.5 KiB
EmacsLisp
107 lines
3.5 KiB
EmacsLisp
;;; ui/pretty-code/settings.el -*- lexical-binding: t; -*-
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;;;###autoload
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(defvar +pretty-code-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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;; 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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;; 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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:tuple "⨂"
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:pipe "" ;; FIXME: find a non-private char
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:dot "•")
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"Options plist for `set-pretty-symbols!'.
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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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;;;###autoload
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(defvar +pretty-code-symbols-alist '((t))
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"An alist containing a mapping of major modes to its value for
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`prettify-symbols-alist'.")
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;;;###autodef
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(defun +pretty-code--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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;;;###autodef
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(defun set-pretty-symbols! (modes &rest plist)
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"Associates string patterns with icons in certain major-modes.
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MODES is a major mode symbol or a list of them.
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PLIST is a property list whose keys must match keys in `+pretty-code-symbols',
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and whose values are strings representing the text to be replaced with that
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symbol. If the car of PLIST is nil, then unset any pretty symbols previously
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defined for MODES.
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The following properties are special:
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:alist ALIST
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Appends ALIST to `prettify-symbols-alist' literally, without mapping text to
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`+pretty-code-symbols'.
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:merge BOOL
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If non-nil, merge with previously defined `prettify-symbols-alist',
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otherwise overwrite it.
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For example, the rule for emacs-lisp-mode is very simple:
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(set-pretty-symbols! 'emacs-lisp-mode
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:lambda \"lambda\")
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This will replace any instances of \"lambda\" in emacs-lisp-mode with the symbol
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assicated with :lambda in `+pretty-code-symbols'.
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Pretty symbols can be unset for emacs-lisp-mode with:
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(set-pretty-symbols! 'emacs-lisp-mode nil)"
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(declare (indent defun))
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(if (null (car-safe plist))
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(dolist (mode (doom-enlist modes))
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(delq (assq mode +pretty-code-symbols-alist)
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+pretty-code-symbols-alist))
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(let (results merge key)
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(while plist
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(pcase (setq key (pop plist))
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(:merge (setq merge (pop plist)))
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(:alist (setq results (append (pop plist) results)))
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(_
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(when-let* ((char (plist-get +pretty-code-symbols key)))
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(push (cons (pop plist) char) results)))))
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(dolist (mode (doom-enlist modes))
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(unless merge
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(delq (assq mode +pretty-code-symbols-alist)
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+pretty-code-symbols-alist))
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(push (cons mode results) +pretty-code-symbols-alist)))))
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