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-;;; custom-misc.el --- Miscellaneous utility functions  -*- coding: utf-8; lexical-binding: t; -*-
-
-;;; Commentary:
-;;
-;; Layer: 2 (Core UX).
-;; Category: L/C.
-;; Load shape: eager.
-;; Eager reason: registers its C-; command bindings and an align-regexp advice
-;;   at load. Currently eager by init order; a deferral candidate for Phase 3/4.
-;; Top-level side effects: advises align-regexp; binds several commands directly
-;;   under C-; (")", "f", "A", "SPC", "|", and others).
-;; Runtime requires: keybindings.
-;; Direct test load: yes (requires keybindings explicitly).
-;;
-;; This module provides various utility functions for text manipulation,
-;; formatting, and navigation.  Features include:
-;; - Jump between matching delimiters
-;; - Format regions/buffers (untabify, reindent, remove trailing whitespace)
-;; - Word counting with region awareness
-;; - Fraction glyph conversion (¼ ↔ 1/4)
-;; - Force align-regexp to use spaces instead of tabs
-;;
-;; All functions are bound to the cj/custom-keymap for easy access.
-;;
-;;; Code:
-
-(require 'keybindings)  ;; provides cj/custom-keymap
-
-(defun cj/jump-to-matching-paren ()
-  "Jump to the matching delimiter if point is on (or just after) one.
-If not on a delimiter, show a message. Respects the current syntax table."
-  (interactive)
-  (let* ((ca (char-after))
-		 (cb (char-before))
-		 ;; Check if on opening paren
-		 (open-p (and ca (eq (char-syntax ca) ?\()))
-		 ;; Check if on or just after closing paren
-		 (close-p (or (and ca (eq (char-syntax ca) ?\)))
-					  (and cb (eq (char-syntax cb) ?\))))))
-	(cond
-	 ;; Jump forward from opening
-	 (open-p
-	  (condition-case err
-		  (forward-sexp)
-		(scan-error
-		 (message "No matching delimiter: %s" (error-message-string err)))))
-	 ;; Jump backward from closing
-	 (close-p
-	  (condition-case err
-		  (backward-sexp)
-		(scan-error
-		 (message "No matching delimiter: %s" (error-message-string err)))))
-	 ;; Not on delimiter
-	 (t
-	  (message "Point is not on a delimiter.")))))
-
-
-(defun cj/--format-region (start end)
-  "Internal implementation: Reformat text between START and END.
-START and END define the region to operate on.
-Replaces tabs with spaces, reindents, and deletes trailing whitespace."
-  (when (> start end)
-    (error "Invalid region: start (%d) is greater than end (%d)" start end))
-  (save-excursion
-    (save-restriction
-      (narrow-to-region start end)
-      (untabify (point-min) (point-max))
-      (indent-region (point-min) (point-max))
-      (delete-trailing-whitespace (point-min) (point-max)))))
-
-(defun cj/format-region-or-buffer ()
-  "Reformat the region or the entire buffer.
-Replaces tabs with spaces, deletes trailing whitespace, and reindents."
-  (interactive)
-  (let ((start-pos (if (use-region-p) (region-beginning) (point-min)))
-        (end-pos (if (use-region-p) (region-end) (point-max))))
-    (cj/--format-region start-pos end-pos)
-    (message "Formatted %s" (if (use-region-p) "region" "buffer"))))
-
-(defun cj/switch-to-previous-buffer ()
-  "Switch to previously open buffer.
-Repeated invocations toggle between the two most recently open buffers."
-  (interactive)
-  (switch-to-buffer (other-buffer (current-buffer) 1)))
-
-(defun cj/--count-words (start end)
-  "Internal implementation: Count words between START and END.
-START and END define the region to count.
-Returns the word count as an integer."
-  (when (> start end)
-    (error "Invalid region: start (%d) is greater than end (%d)" start end))
-  (count-words start end))
-
-(defun cj/count-words-buffer-or-region ()
-  "Count the number of words in the buffer or region.
-Display the result in the minibuffer."
-  (interactive)
-  (let* ((use-region (use-region-p))
-		 (begin (if use-region (region-beginning) (point-min)))
-		 (end (if use-region (region-end) (point-max)))
-		 (area-type (if use-region "the region" "the buffer"))
-		 (word-count (cj/--count-words begin end)))
-	(message "There are %d words in %s." word-count area-type)))
-
-(defun cj/--count-characters (start end)
-  "Internal implementation: Count characters between START and END.
-START and END define the region to count.
-Returns the character count as an integer."
-  (when (> start end)
-    (error "Invalid region: start (%d) is greater than end (%d)" start end))
-  (- end start))
-
-(defun cj/count-characters-buffer-or-region ()
-  "Count the number of characters in the buffer or region.
-Display the result in the minibuffer."
-  (interactive)
-  (let* ((use-region (use-region-p))
-		 (begin (if use-region (region-beginning) (point-min)))
-		 (end (if use-region (region-end) (point-max)))
-		 (area-type (if use-region "the region" "the buffer"))
-		 (char-count (cj/--count-characters begin end)))
-	(message "There are %d characters in %s." char-count area-type)))
-
-
-(defun cj/--replace-fraction-glyphs (start end to-glyphs)
-  "Internal implementation: Replace fraction glyphs or text between START and END.
-START and END define the region to operate on.
-TO-GLYPHS when non-nil converts text (1/4) to glyphs (¼),
-otherwise converts glyphs to text."
-  (when (> start end)
-    (error "Invalid region: start (%d) is greater than end (%d)" start end))
-  (let ((replacements (if to-glyphs
-                          '(("1/4" . "¼")
-                            ("1/2" . "½")
-                            ("3/4" . "¾")
-                            ("1/3" . "⅓")
-                            ("2/3" . "⅔"))
-                        '(("¼" . "1/4")
-                          ("½" . "1/2")
-                          ("¾" . "3/4")
-                          ("⅓" . "1/3")
-                          ("⅔" . "2/3"))))
-        (count 0)
-        (end-marker (copy-marker end)))
-    (save-excursion
-      (dolist (r replacements)
-        (goto-char start)
-        (while (search-forward (car r) end-marker t)
-          (replace-match (cdr r))
-          (setq count (1+ count)))))
-    count))
-
-(defun cj/replace-fraction-glyphs (start end)
-  "Replace common fraction glyphs between START and END.
-Operate on the buffer or region designated by START and END.
-Replace the text representations with glyphs when called with a
-\\[universal-argument] prefix."
-  (interactive (if (use-region-p)
-                   (list (region-beginning) (region-end))
-                 (list (point-min) (point-max))))
-  (let ((count (cj/--replace-fraction-glyphs start end current-prefix-arg)))
-    (message "Replaced %d fraction%s" count (if (= count 1) "" "s"))))
-
-(defun cj/align-regexp-with-spaces (orig-fun &rest args)
-  "Call ORIG-FUN with ARGS while temporarily disabling tabs for alignment.
-This advice ensures =align-regexp' uses spaces by binding =indent-tabs-mode'
-to nil."
-  (let ((indent-tabs-mode nil))
-	(apply orig-fun args)))
-
-;; avoid double advice stacking in case the file is reloaded
-(advice-remove 'align-regexp #'cj/align-regexp-with-spaces)
-(advice-add    'align-regexp :around #'cj/align-regexp-with-spaces)
-
-(cj/register-command ")" #'cj/jump-to-matching-paren)
-(cj/register-command "f" #'cj/format-region-or-buffer)
-(cj/register-command "# w" #'cj/count-words-buffer-or-region)
-(cj/register-command "# c" #'cj/count-characters-buffer-or-region)
-(cj/register-command "/" #'cj/replace-fraction-glyphs)
-(cj/register-command "A" #'align-regexp)
-(cj/register-command "SPC" #'cj/switch-to-previous-buffer)
-(cj/register-command "|" #'display-fill-column-indicator-mode)
-
-(with-eval-after-load 'which-key
-  (which-key-add-key-based-replacements
-    "C-; )" "jump to paren"
-    "C-; f" "format buffer"
-    "C-; # w" "count words"
-    "C-; # c" "count characters"
-    "C-; /" "fraction glyphs"
-    "C-; A" "align regexp"
-    "C-; SPC" "prev buffer"
-    "C-; |" "fill column"))
-
-(provide 'custom-misc)
-;;; custom-misc.el ends here