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(add-hook 'text-mode-hook 'abbrev-mode)
(add-hook 'prog-mode-hook 'abbrev-mode)
(define-abbrev-table 'typo-abbrev-table nil)
(abbrev-table-put global-abbrev-table :parents
(cons typo-abbrev-table
(abbrev-table-get global-abbrev-table :parents)))
(defun km/abbrev-add-case-global ()
"Define lower abbreviation for the word before point.
Like `add-global-abbrev', but always make the abbreviation the
lower case variant of the word before point."
(interactive)
;; Modified from `add-abbrev'.
(let* ((table global-abbrev-table)
(exp (buffer-substring-no-properties
(point)
(save-excursion (forward-word -1) (point))))
(name (downcase exp)))
(when (or (not (abbrev-expansion name table))
(y-or-n-p (format "%s expands to \"%s\"; redefine? "
name (abbrev-expansion name table))))
(define-abbrev table name exp))))
(defun km/abbrev-inverse-add-uppercase-global ()
"Define uppercase expansion for the word before point.
Like `inverse-add-global-abbrev', but always use the lower case
version of the word before point as the abbreviation and the
upper case version as the expansion."
(interactive)
;; Modified from `inverse-add-abbrev'.
(let* ((table global-abbrev-table)
(end (point))
(start (save-excursion (forward-word -1) (point)))
(name (downcase (buffer-substring-no-properties start end)))
(exp (upcase name)))
(when (or (not (abbrev-expansion name table))
(y-or-n-p (format "%s expands to \"%s\"; redefine? "
name (abbrev-expansion name table))))
(define-abbrev table name exp)
(save-excursion
(goto-char end)
(expand-abbrev)))))
(define-key abbrev-map "c" 'km/abbrev-add-case-global)
(define-key abbrev-map "iu" 'km/abbrev-inverse-add-uppercase-global)
(provide 'init-abbrev)
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