xtodo emacs

• Emacs: Spell Check

• write a tutorial , install hunspell howto, add to emacs windows page.
• maybe install flip (convert eol), grep, ex, bzip2, findutils

• Emacs Flaw: Spell Checker (2010)

• Emacs: Microsoft Windows Tips

• Xah Talk Show 2025-07-01 Ep672 Make Spell Checking in Emacs Windows Work Again, Part 2

(when (eq system-type 'windows-nt)
  ;; 2025-07-01 thanks to
  ;; https://emacselements.com/getting-spelling-to-work-on-windows.html
  (require 'ispell)
  (progn
    ;; make sure hunspell is in system environment variable PATH
    (setq ispell-program-name "d:/bin/ezwinports/bin/hunspell.exe")
    (setq ispell-local-dictionary "en_US")
    (setq ispell-local-dictionary-alist
          '(("en_US" "[[:alpha:]]" "[^[:alpha:]]" "[']" nil ("-d" "en_US") nil utf-8)))

    (when (boundp 'ispell-hunspell-dictionary-alist)
      (setq ispell-hunspell-dictionary-alist ispell-local-dictionary-alist))
    ;; (setq hunspell-default-dict "en_US")
    ))

• emacs tutorial, completely redo, generate, emacs lisp function doc tooltip popup, and for xah emacs lisp mode keyword Syntax Coloring.
• example of uncolored functions
• dired-get-marked-files
• dired-mode
• set-buffer-file-coding-system
• Elisp: Generic Map Functions (for hash table, alist, plist)
• readme.txt

• Elisp: Symbol
• Elisp: Types of Functions

;; determine if a elisp function is written in C vs not.

(defvar xah-elisp-symbols-c nil "Lisp function written in C")
(defvar xah-elisp-symbols-not-c nil "Lisp function defined in lisp")

(mapcar
 (lambda (x)
   (if (subrp (symbol-function (intern-soft x)))
       (progn
         (push x xah-elisp-symbols-c))
     (progn (push x xah-elisp-symbols-not-c))))
 xah-elisp-all-symbols)

(length xah-elisp-all-symbols)
27324

(length xah-elisp-symbols-c)
9319

(length xah-elisp-symbols-not-c)
18005

• 2021-07-04 modify xah-reformat-lines if cursor is on a left parenthesis or bracket, just do the bracketed text. if cursor is at beginning of line, just do that line.

• look into how emacs function use keyword params (keyword args)
• look at define-keymap for implementing keyword args

• Elisp: Function Keyword Parameters (Named Parameters)

• emacs. fix why emacs windows on terminal does not show unicode emoji correctly

• Emacs: File Encoding (Unicode, UTF-8)
• Emacs: Declare Encoding for One File (Unicode, UTF-8)
• Emacs Init: Set Default File Encoding (Unicode, UTF-8)

(set-language-environment "utf-8")
;; current-language-environment

(set-default-coding-systems 'utf-8)

(set-terminal-coding-system 'utf-8)
;; default-terminal-coding-system

(set-keyboard-coding-system 'utf-8)

• what are these
• describe-personal-keybindings
• bind-key

• maybe setup keys in Xah Fly Keys
• C-x RET C-\ set-input-method
• C-x RET F set-file-name-coding-system
• C-x RET X set-next-selection-coding-system
• C-x RET c universal-coding-system-argument
• C-x RET f set-buffer-file-coding-system
• C-x RET k set-keyboard-coding-system
• C-x RET l set-language-environment
• C-x RET p set-buffer-process-coding-system
• C-x RET r revert-buffer-with-coding-system
• C-x RET t set-terminal-coding-system
• C-x RET x set-selection-coding-system

• add more detail
• Elisp: Format String

• multi-isearch-buffers
• multi-isearch-buffers-regexp
• multi-isearch-files
• multi-isearch-files-regexp

Open File as Hexadecimal

Alt+x hexl-find-file. If the file is already opened, Alt+x hexl-mode.

• Emacs: Syntax Color CSS Color Values 📜

• emacs problem. when a command uses completing-read, and user record a key macro calling that command, it does not work. you need to type the entire word. ido-completing-read works

;; this works

(defun ff ()
  "
Created: 2025-04-13
Version: 2025-04-13
"
  (interactive)
  (let (xmenu xresult)
    (setq xmenu (list "aa" "bb" "cc"))
    (setq xresult (completing-read "Pick one:" xmenu nil t))
    (insert xresult)))

;; need more test

;; (ido-completing-read "Pick CSS keyword:" xah-css-all-keywords nil t xword)

• Elisp: Get User Input

;; -*- coding: utf-8; lexical-binding: t; -*-

;; (defun my-number-to-binary (xnum)
;;   "Convert a number xnum to its binary representation as a string."
;;   (if (< xnum 0)
;;       (error "Negative numbers are not supported")
;;     (let ((xresult ""))
;;       (while (> xnum 0)
;;         (setq xresult (concat (number-to-string (mod xnum 2)) xresult))
;;         (setq xnum (/ xnum 2)))
;;       (if (string-empty-p xresult)
;;           "0"
;;         xresult))))

(defun xah-convert-number-base (xint xradix)
  "Convert a number xint to a list of digits in base xradix"
  (when (< xint 0) (error "negative not supported"))
  (when (not (integerp xint)) (error "float number not supported"))
  (let ((xresult (list)))
    (while (> xint 0)
      (push (mod xint xradix) xresult)
      (setq xint (/ xint xradix)))
    xresult))

(xah-convert-number-base -2 2)

(xah-convert-number-base 3.5 2)

(xah-convert-number-base 39 16)
;; (2 7)

;; (defun my-number-to-binary-string (xnum)
;;   "return a string of binary representation of number xnum.
;; Created: 2025-07-24
;; Version: 2025-07-24"
;;   (require 'calc-bin)
;;   (let ((calc-number-radix 2))
;;     (math-format-radix xnum)))

;; (my-number-to-binary-string 3)
;; "11"

• Elisp: Convert Number, String

• Binary / Hexadecimal Converter

• change side panel
• Elisp: Get Operating System Type

• xah_regex.txt

• add display-graphic-p to init tutorial

• in my html mode, fix all function so greater and less sign with space around is ok.
• change the search for them to include tag string regex.

• 2025-05-07 mod xah-html-markdown-to-html, make it use external app

• 2025-05-07 emacs mod xah-html-split-section-to-new-page , make it add js at the end

• 2025-05-07
• xah-html-extract-url
• ;; make the command not rely on called-interactively-p. maybe separate it into a interactive wrapper.

• emacs lisp, do the twitter card, at least on the keyboard blog pages

• xah-build-thumb-table
• xah-add-to-thumb-table
• xah-insert-twitter-card

• xah_add_twitter_card.el

• emacs lisp write a find report version of xah-replace-invisible-char

• x_html_validate.txt

• fix. xah-html-relink jumps when on a p link. need complete rewrite.

• fix. why xah-html-move-image-file jiggles a block before inserting image tag.

• look at all my emacs lisp start process or call process, or shell, make it use call process region maybe

• dired-goto-file
• dired-next-line
• dired-get-filename

• Search-based Fontification (ELISP Manual)

• doc font-lock-keywords

• Elisp: Font Lock Mode

;; why some have double paren
  (setq font-lock-defaults '((xah-css-font-lock-keywords)))
  (setq font-lock-defaults '(xah-css-font-lock-keywords))

;; should this be nil
font-lock-maximum-decoration

• 2022-12-22 download a english dict word list. needed for abbrev system work. Xah Shorthand System (Abbrev Input)

• installing dict
• http://irreal.org/blog/?p=6546

• x-xah-get-matching-bracket.el

• review or clean xah-unicode-emoji-only-chars in xah-unicode-mode.el

• 2021-08-14 move this to main emacs lisp index
• Elisp: Enable Undo in Buffer
• also check Emacs Lisp Misc

xah html mode command changes:

This command was named xah-html-wrap-p-tag. Changed around 2021-08-17.

• xah-html-wrap-p-tag → xah-html-blocks-to-paragraph Emacs: HTML, Wrap Paragraph Tags

• xah-html-wrap-html-tag → xah-html-insert-tag

work on emacs lisp

• Emacs: Hippie Expand
• Emacs: Search Text

• find emacs lisp doc location of hippie-expand, read it.

• find in emacs doc and read
• char-fold-to-regexp
• char-fold-include
• search-default-mode
• isearch-toggle-char-fold
• isearch-toggle-case-fold
• isearch-toggle-lax-whitespace
• dabbrev-completion
• char-fold-symmetric

• Dynamic Abbrevs (GNU Emacs Manual)

emacs lisp XahEmacs key design

2021-08-08 notes. designing a key system for whole XahEmacs

now, with XahEmacs, several packages, with xah-fly-keys system, there needs to be a scheme for the leader keys. For example, gnu emacs has Emacs Keys Overview. I needd a scheme for XahEmacs, so the whole is consistant, as a secondary requirement to key efficiency and ergonomics.

here's outline of current xah-fly-keys

..[hilight]  p.replace       g.close c.[open]
e.[insert] u.switchBuff     h.[help] t.[edit]
j.copyAll k.pasteOrPrev     m.diredJump w.[eval/del]

• 2021-08-09 look at all my commands, if it's a repeatable command, add a t key to repeat, and if have a right/left or up/down or back/forth version, add a keymap

• 2021-07-21 mod xah-copy-file-path so C-u first will just copy file name sans directory.
• 2021-07-06 add a hook to xah-run-current-file so that when golang script is run it'll invoke xah-find-output-mode in the output buffer.
• 2021-02-12 add to emacs lisp tutorial xah-words-word-etymology-linkify remove the one at Xah Emacs Blog Archive 2018-08
• 2021-04-14 add somewhere 〔Rob Pike and Richard Stallman 2006-06-11 By Rob Pike. At https://commandcenter.blogspot.com/2006/06/ 〕
• 2021-04-14 add somewhere 〔Why Do Long Options Start with Two Dashes? 2019-08-02 By Djm. At https://blog.djmnet.org/2019/08/02/why-do-long-options-start-with/ 〕
• 2021-02-14 delete xahsite-web-path-to-filepath
• 2021-01-01 Emacs Key Layout Diagram redo in svg
• 2020-12-21 work in progress Emacs Magit Mode Problem
• 2020-12-19 look into make abbrev run a function
• maybe put somewhere make-empty-file . be careful, if you call it and just hit enter for current dir, it wipes out the current file.
• 2020-08-28 Emacs: Version Control
• 2020-08-26 emacs has window-toggle-side-windows. it can be used to toggle the side pane of treemacs. Thanks to Rick Naam for this tip. read in detail.
• Emacs Helm Doc Problem
• Problem of Calling Windows cmd.exe in Emacs Lisp
• 2020-12-15 fix xah-replace-straight-quotes so that it won't change things inside html tag.
• 2020-08-20 make the atom xml file title bold
• Emacs 27.1 Features (released 2020-08)

• xah-bracket-capitalized-words code updated
• write a tutorial on emacs lisp macro
• 2021-08-06 read eshell doc. seems grep , diff, are builtin. • also, find out how to use bash ||.
• 2021-08-06 code update xah-delete-current-file Emacs: Delete Current File
• 2021-07-17 mod xah-get-fullpath at Elisp: Get Script Name at Run Time, Call by Relative Path, maybe to a new page.