From 95109387d74c66fe02402bddb3fb5009b0550919 Mon Sep 17 00:00:00 2001
From: Kenichi Handa <handa@m17n.org>
Date: Thu, 7 Sep 2000 02:38:46 +0000
Subject: [PATCH] Don't require face. (quail): New group.
 (quail-other-command): Dummy command to make quail-help works better.
 (quail-keyboard-layout-alist): Add Keyboard type "jp106".
 (quail-keyboard-layout-substitution): New variable.
 (quail-update-keyboard-layout): New function. (quail-keyboard-layout-type):
 New customizable variable. (quail-set-keyboard-layout): Call
 quail-update-keyboard-layout. (quail-keyboard-translate): Pay attention to
 quail-keyboard-layout-substitution. (quail-insert-kbd-layout): New function.
 (quail-show-keyboard-layout): New function. (quail-get-translation): If the
 definition is a vector of length 1, and the element is a string of lenght 1,
 return the character in that string. (quail-update-current-translations): Fix
 the case of relative-index out of range. (quail-build-decode-map,
 quail-insert-decode-map): New Functions. (quail-help): Show keyboard layout
 by quail-insert-kbd-layout. Show key sequences for all avairable characters.
 (quail-help-insert-keymap-description): Don't show such verbose key bindings
 as quail-self-insert-command.

---
 lisp/international/quail.el | 525 +++++++++++++++++++++++++++++-------
 1 file changed, 430 insertions(+), 95 deletions(-)

diff --git a/lisp/international/quail.el b/lisp/international/quail.el
index 710f8c87d54..22e24f3fa37 100644
--- a/lisp/international/quail.el
+++ b/lisp/international/quail.el
@@ -43,7 +43,9 @@
 
 ;;; Code:
 
-(require 'faces)
+(defgroup quail nil
+  "Quail: multilingual input method."
+  :group 'leim)
 
 ;; Buffer local variables
 
@@ -270,6 +272,15 @@ Only a few especially complex input methods use this map;
 most use `quail-simple-translation-keymap' instead.
 This map is activated while translation region is active.")
 
+;; Hide some verbose commands to make the output of quail-help
+;; concise.
+(let ((l '(quail-other-command
+	   quail-self-insert-command
+	   quail-delete-last-char)))
+  (while l
+    (put (car l) 'quail-help-hide t)
+    (setq l (cdr l))))
+
 (defvar quail-simple-translation-keymap
   (let ((map (make-keymap))
 	(i 0))
@@ -319,6 +330,11 @@ This map is activated while translation region is active.")
 This map is activated while conversion region is active but translation
 region is not active.")
 
+;; Just a dummy definition.
+(defun quail-other-command ()
+  (interactive)
+  )
+
 ;;;###autoload
 (defun quail-define-package (name language title
 				  &optional guidance docstring translation-keys
@@ -562,6 +578,7 @@ The command `quail-set-keyboard-layout' usually sets this variable.")
 
 (defvar quail-keyboard-layout-alist
   (list
+   (cons "standard" quail-keyboard-layout-standard)
    '("sun-type3" . "\
                               \
   1!2@3#4$5%6^7&8*9(0)-_=+\\|`~\
@@ -585,10 +602,61 @@ The command `quail-set-keyboard-layout' usually sets this variable.")
 <>yYxXcCvVbBnNmM,;.:-_        \
                               ")
 
-   (cons "standard" quail-keyboard-layout-standard))
+   '("jp106" . "\
+                              \
+  1!2\"3#4$5%6&7'8(9)0~-=^~\\|  \
+  qQwWeErRtTyYuUiIoOpP@`[{    \
+  aAsSdDfFgGhHjJkKlL;+:*]}    \
+  zZxXcCvVbBnNmM,<.>/?\\_      \
+                              ")
+   )
   "Alist of keyboard names and corresponding layout strings.
 See the documentation of `quail-keyboard-layout' for the format of
- the layout string.")
+the layout string.")
+
+;; A non-standard keyboard layout may miss some key locations of the
+;; standard layout while having additional key locations not in the
+;; standard layout.  This alist maps those additional key locations to
+;; the missing locations.  The value is updated automatically by
+;; quail-set-keyboard-layout.
+(defvar quail-keyboard-layout-substitution nil)
+
+(defun quail-update-keyboard-layout (kbd-type)
+  (let ((layout (assoc kbd-type quail-keyboard-layout-alist)))
+    (if (null layout)
+	;; Here, we had better ask a user to define his own keyboard
+	;; layout interactively.
+	(error "Unknown keyboard type `%s'" kbd-type))
+    (setq quail-keyboard-layout (cdr layout))
+    (let ((i quail-keyboard-layout-len)
+	  subst-list missing-list)
+      ;; Sum up additional key locations not in the standard layout in
+      ;; subst-list, and missing key locations in missing-list.
+      (while (> i 0)
+	(setq i (1- i))
+	(if (= (aref quail-keyboard-layout i) ? )
+	    (if (/= (aref quail-keyboard-layout-standard i) ? )
+		(setq missing-list (cons i missing-list)))
+	  (if (= (aref quail-keyboard-layout-standard i) ? )
+	      (setq subst-list (cons (cons i nil) subst-list)))))
+      (setq quail-keyboard-layout-substitution subst-list)
+      ;; If there are additional key locations, map them to missing
+      ;; key locations.
+      (while missing-list
+	(while (and subst-list (cdr (car subst-list)))
+	  (setq subst-list (cdr subst-list)))
+	(if subst-list
+	    (setcdr (car subst-list) (car missing-list)))
+	(setq missing-list (cdr missing-list))))))
+
+(defcustom quail-keyboard-layout-type "standard"
+  "Type of keyboard layout used in Quail base input method.
+Available types are listed in the variable `quail-keyboard-layout-alist'."
+  :group 'quail
+  :type 'string
+  :set #'(lambda (symbol value)
+	   (quail-update-keyboard-layout value)
+	   (set symbol value)))
 
 ;;;###autoload
 (defun quail-set-keyboard-layout (kbd-type)
@@ -604,36 +672,166 @@ you type is correctly handled."
 	  (type (completing-read "Keyboard type: "
 				 quail-keyboard-layout-alist)))
      (list type)))
-  (let ((layout (assoc kbd-type quail-keyboard-layout-alist)))
-    (if (null layout)
-	;; Here, we had better ask a user to define his own keyboard
-	;; layout interactively.
-	(error "Unknown keyboard type `%s'" kbd-type))
-    (setq quail-keyboard-layout (cdr layout))))
+  (quail-update-keyboard-layout kbd-type)
+  (setq quail-keyboard-layout-type kbd-type))
 
-(defun quail-keyboard-translate (ch)
-  "Translate CHAR according to `quail-keyboard-layout' and return the result."
+(defun quail-keyboard-translate (char)
+  "Translate CHAR to the one in the standard keyboard layout."
   (if (eq quail-keyboard-layout quail-keyboard-layout-standard)
       ;; All Quail packages are designed based on
       ;; `quail-keyboard-layout-standard'.
-      ch
+      char
     (let ((i 0))
+      ;; Find the key location on the current keyboard layout.
       (while (and (< i quail-keyboard-layout-len)
-		  (/= ch (aref quail-keyboard-layout i)))
+		  (/= char (aref quail-keyboard-layout i)))
 	(setq i (1+ i)))
       (if (= i quail-keyboard-layout-len)
-	  ;; CH is not in quail-keyboard-layout, which means that a
+	  ;; CHAR is not in quail-keyboard-layout, which means that a
 	  ;; user typed a key which generated a character code to be
-	  ;; handled out of Quail.  Just return CH and make
+	  ;; handled out of Quail.  Just return CHAR and make
 	  ;; quail-execute-non-quail-command handle it correctly.
-	  ch
-	(let ((char (aref quail-keyboard-layout-standard i)))
-	  (if (= char ?\ )
-	      ;; A user typed a key at the location not converted by
-	      ;; quail-keyboard-layout-standard.  Just return CH as
-	      ;; well as above.
-	      ch
-	    char))))))
+	  char
+	(let ((ch (aref quail-keyboard-layout-standard i)))
+	  (if (= ch ?\ )
+	      ;; This location not available in the standard keyboard
+	      ;; layout.  Check if the location is used to substitute
+	      ;; for the other location of the standard layout.
+	      (if (setq i (cdr (assq i quail-keyboard-layout-substitution)))
+		  (aref quail-keyboard-layout-standard i)
+		;; Just return CHAR as well as above.
+		char)
+	    ch))))))
+
+;; Insert the visual keyboard layout table according to KBD-LAYOUT.
+;; The format of KBD-LAYOUT is the same as `quail-keyboard-layout'.
+(defun quail-insert-kbd-layout (kbd-layout)
+  (let (done-list layout i ch)
+    ;; At first, convert KBD-LAYOUT to the same size vector that
+    ;; contains translated character or string.
+    (setq layout (string-to-vector kbd-layout)
+	  i 0)
+    (while (< i quail-keyboard-layout-len)
+      (setq ch (aref kbd-layout i))
+      (if (quail-kbd-translate)
+	  (setq ch (quail-keyboard-translate ch)))
+      (let* ((map (cdr (assq ch (cdr (quail-map)))))
+	     (translation (and map (quail-get-translation
+				    (car map) (char-to-string ch) 1))))
+	(if translation
+	    (progn
+	      (if (consp translation)
+		  (setq translation (aref (cdr translation) 0)))
+	      (setq done-list (cons translation done-list)))
+	  (setq translation ch))
+	(aset layout i translation))
+      (setq i (1+ i)))
+
+    (let ((pos (point))
+	  (bar "|")
+	  lower upper row)
+      ;; Make table without horizontal lines.  Each column for a key
+      ;; has the form "| LU |" where L is for lower key and and U is
+      ;; for a upper key.  If width of L (U) is greater than 1,
+      ;; preceding (following) space is not inserted.
+      (put-text-property 0 1 'face 'bold bar)
+      (setq i 0)
+      (while (< i quail-keyboard-layout-len)
+	(when (= (% i 30) 0)
+	  (setq row (/ i 30))
+	  (if (> row 1)
+	      (insert-char 32 (+ row (/ (- row 2) 2)))))
+	(setq lower (aref layout i)
+	      upper (aref layout (1+ i)))
+	(if (and (integerp lower) (>= lower 128) (< lower 256))
+	    (setq lower (unibyte-char-to-multibyte lower)))
+	(if (and (integerp upper) (>= upper 128) (< upper 256))
+	    (setq upper (unibyte-char-to-multibyte upper)))
+	(insert bar)
+	(if (= (if (stringp lower) (string-width lower) (char-width lower)) 1)
+	    (insert " "))
+	(insert lower upper)
+	(if (= (if (stringp upper) (string-width upper) (char-width upper)) 1)
+	    (insert " "))
+	(setq i (+ i 2))
+	(if (= (% i 30) 0)
+	    (insert bar "\n")))
+      ;; Insert horizontal lines while deleting blank key columns at the
+      ;; beginning and end of each line.
+      (save-restriction
+	(narrow-to-region pos (point))
+	(goto-char pos)
+	;;(while (looking-at "[| ]*$")
+	;;(forward-line 1)
+	;;(delete-region pos (point)))
+	(let ((from1 100) (to1 0) from2 to2)
+	  (while (not (eobp))
+	    (if (looking-at "[| ]*$")
+		;; The entire row is blank.
+		(delete-region (point) (match-end 0))
+	      ;; Delete blank key columns at the head.
+	      (if (looking-at " *\\(|    \\)+")
+		  (subst-char-in-region (point) (match-end 0) ?| ? ))
+	      ;; Delete blank key columns at the tail.
+	      (if (re-search-forward "\\(    |\\)+$" (line-end-position) t)
+		  (delete-region (match-beginning 0) (point)))
+	      (beginning-of-line))
+	    ;; Calculate the start and end columns of a horizontal line.
+	    (if (eolp)
+		(setq from2 from1 to2 to1)
+	      (skip-chars-forward " ")
+	      (setq from2 (current-column))
+	      (end-of-line)
+	      (setq to2 (current-column))
+	      (if (< from2 from1)
+		  (setq from1 from2))
+	      (if (> to2 to1)
+		  (setq to1 to2))
+	      (beginning-of-line))
+	    ;; If the previous or the current line has at least one key
+	    ;; column, insert a horizontal line.
+	    (when (> to1 0)
+	      (insert-char 32 from1)
+	      (setq pos (point))
+	      (insert "+")
+	      (insert-char ?- (- (- to1 from1) 2))
+	      (insert "+")
+	      (put-text-property pos (point) 'face 'bold)
+	      (insert "\n"))
+	    (setq from1 from2 to1 to2)
+	    (forward-line 1)))
+	;; Insert "space bar" box.
+	(forward-line -1)
+	(setq pos (point))
+	(insert
+"		    +-----------------------------+
+		    |          space bar          |
+		    +-----------------------------+
+")
+	(put-text-property pos (point) 'face 'bold)
+	(insert ?\n)))
+
+    done-list))
+
+;;;###autoload
+(defun quail-show-keyboard-layout (&optional keyboard-type)
+  "Show keyboard layout."
+  (interactive
+   (list (completing-read "Keyboard type (default, current choise): "
+			  quail-keyboard-layout-alist
+			  nil t)))
+  (or (and keyboard-type (> (length keyboard-type) 0))
+      (setq keyboard-type quail-keyboard-layout-type))
+  (let ((layout (assoc keyboard-type quail-keyboard-layout-alist)))
+    (or layout
+	(error "Unknown keyboard type: %s" keyboard-type))
+    (with-output-to-temp-buffer "*Help*"
+      (save-excursion
+	(set-buffer standard-output)
+	(insert "Keyboard layout (keyboard type: "
+		keyboard-type
+		")\n")
+	(quail-insert-kbd-layout (cdr layout))))))
 
 ;; Quail map
 
@@ -921,19 +1119,23 @@ selected translation."
     nil)
 
    ((stringp def)
-    ;; Each character in DEF is a candidate of translation.  Reform
-    ;; it as (INDICES . VECTOR).
-    (setq def (string-to-vector def))
-    ;; But if the length is 1, we don't need vector but a single
-    ;; candidate as the translation.
+    ;; If the length is 1, we don't need vector but a single candidate
+    ;; as the translation.
     (if (= (length def) 1)
 	(aref def 0)
-      (cons (list 0 0 0 0 nil) def)))
+      ;; Each character in DEF is a candidate of translation.  Reform
+      ;; it as (INDICES . VECTOR).
+      (cons (list 0 0 0 0 nil) (string-to-vector def))))
 
    ((vectorp def)
-    ;; Each element (string or character) in DEF is a candidate of
-    ;; translation.  Reform it as (INDICES . VECTOR).
-    (cons (list 0 0 0 0 nil) def))
+    ;; If the length is 1, and the length of element string is 1, we
+    ;; don't need vector but a single candidate as the translation.
+    (if (and (= (length def) 1)
+	     (= (length (aref def 0)) 1))
+	(aref (aref def 0) 0)
+      ;; Each element (string or character) in DEF is a candidate of
+      ;; translation.  Reform it as (INDICES . VECTOR).
+      (cons (list 0 0 0 0 nil) def)))
 
    (t
     (error "Invalid object in Quail map: %s" def))))
@@ -1346,7 +1548,7 @@ The returned value is a Quail map specific to KEY."
 	  (setcar (nthcdr 2 indices) end)))
     (if relative-index
 	(if (>= (+ start relative-index) end)
-	    (setcar indices end)
+	    (setcar indices (1- end))
 	  (setcar indices (+ start relative-index))))
     (setq quail-current-str
 	  (aref (cdr quail-current-translations) (car indices)))
@@ -1992,92 +2194,225 @@ are shown (at most to the depth specified `quail-completion-max-depth')."
 	       (select-window (active-minibuffer-window))
 	     (exit-minibuffer))))))
 
+(defun quail-build-decode-map (map key decode-map num &optional maxnum ignores)
+  (let ((translation (quail-get-translation (car map) key (length key)))
+	elt)
+    (cond ((integerp translation)
+	   (when (and (> translation 255) (not (memq translation ignores)))
+	     (setcdr decode-map
+		     (cons (cons key translation) (cdr decode-map)))
+	     (setq num (1+ num))))
+	  ((consp translation)
+	   (setq translation (cdr translation))
+	   (let ((multibyte nil))
+	     (mapc (function (lambda (x)
+			       (if (and (if (integerp x) (> x 255)
+					  (> (string-bytes x) (length x)))
+					(not (member x ignores)))
+				   (setq multibyte t))))
+		   translation)
+	     (when multibyte
+	       (setcdr decode-map
+		       (cons (cons key translation) (cdr decode-map)))
+	       (setq num (+ num (length translation)))))))
+    (if (and maxnum (> num maxnum))
+	(- num)
+      (setq map (cdr map))
+      (while (and map (>= num 0))
+	(setq elt (car map) map (cdr map))
+	(when (and (integerp (car elt)) (consp (cdr elt)))
+	  (setq num (quail-build-decode-map (cdr elt)
+					    (format "%s%c" key (car elt))
+					    decode-map num maxnum ignores))))
+      num)))
+
+(defun quail-insert-decode-map (decode-map)
+  (setq decode-map
+	(sort (cdr decode-map)
+	      (function (lambda (x y)
+			  (setq x (car x) y (car y))
+			  (or (> (length x) (length y))
+			      (and (= (length x) (length y))
+				   (not (string< x y))))))))
+  (let ((frame-width (frame-width))
+	(short-key-width 3)
+	(short-trans-width 4)
+	(long-key-width 3)
+	(short-list nil)
+	(long-list nil)
+	elt trans width pos cols rows col row str col-width)
+    ;; Divide the decoding map into shorter one and longer one.
+    (while decode-map
+      (setq elt (car decode-map) decode-map (cdr decode-map)
+	    trans (cdr elt))
+      (if (and (vectorp trans) (= (length trans) 1))
+	  (setq trans (aref trans 0)))
+      (if (vectorp trans)
+	  (setq long-list (cons elt long-list))
+	(setq short-list (cons (cons (car elt) trans) short-list)
+	      width (if (stringp trans) (string-width trans)
+		      (char-width trans)))
+	(if (> width short-trans-width)
+	    (setq short-trans-width width)))
+      (setq width (length (car elt)))
+      (if (> width short-key-width)
+	  (setq short-key-width width))
+      (if (> width long-key-width)
+	  (setq long-key-width width)))
+    (when short-list
+      (setq col-width (+ short-key-width 1 short-trans-width 1)
+	    cols (/ frame-width col-width)
+	    rows (/ (length short-list) cols))
+      (if (> (% (length short-list) cols) 0)
+	  (setq rows (1+ rows)))
+      (insert "key")
+      (indent-to (1+ short-key-width))
+      (insert "char")
+      (indent-to (1+ col-width))
+      (insert "[type a key sequence to insert the corresponding character]\n")
+      (setq pos (point))
+      (insert-char ?\n (+ rows 2))
+      (goto-char pos)
+      (setq col (- col-width) row 0)
+      (while short-list
+	(setq elt (car short-list) short-list (cdr short-list))
+	(when (= (% row rows) 0)
+	  (goto-char pos)
+	  (setq col (+ col col-width))
+	  (move-to-column col t)
+	  (insert-char ?- short-key-width)
+	  (insert ? )
+	  (insert-char ?- short-trans-width)
+	  (forward-line 1))
+	(move-to-column col t)
+	(insert (car elt))
+	(indent-to (+ col short-key-width 1))
+	(insert (cdr elt))
+	(forward-line 1)
+	(setq row (1+ row)))
+      (goto-char (point-max)))
+
+    (when long-list
+      (insert "key")
+      (indent-to (1+ long-key-width))
+      (insert "character(s)  [type a key (sequence) and select one from the list]\n")
+      (insert-char ?- long-key-width)
+      (insert " ------------\n")
+      (while long-list
+	(setq elt (car long-list) long-list (cdr long-list))
+	(insert (car elt))
+	(indent-to long-key-width)
+	(if (vectorp (cdr elt))
+	    (mapc (function
+		   (lambda (x)
+		     (let ((width (if (integerp x) (char-width x)
+				    (string-width x))))
+		       (when (> (+ (current-column) 1 width) frame-width)
+			 (insert "\n")
+			 (indent-to long-key-width))			 
+		       (insert " " x))))
+		  (cdr elt))
+	  (insert " " (cdr elt)))
+	(insert ?\n))
+      (insert ?\n))))
+
 (defun quail-help (&optional package)
   "Show brief description of the current Quail package.
 Optional 2nd arg PACKAGE specifies the alternative Quail package to describe."
   (interactive)
-  (or package
-      (setq package quail-current-package))
+  (if package
+      (setq package (assoc package quail-package-alist))
+    (setq package quail-current-package))
   (let ((help-xref-mule-regexp help-xref-mule-regexp-template))
     (with-output-to-temp-buffer "*Help*"
       (save-excursion
 	(set-buffer standard-output)
 	(setq quail-current-package package)
-	(insert "Quail input method (name:"
-		(quail-name)
-		", mode line indicator:["
+	(insert "Input method: " (quail-name)
+		" (mode line indicator:"
 		(quail-title)
-		"])\n\n---- Documentation ----\n"
+		")\n\n"
 		(quail-docstring))
-	(newline)
-	(if (quail-show-layout) (quail-show-kbd-layout))
+	(or (bolp)
+	    (insert "\n"))
+	(insert "\n")
+
+	(let ((done-list nil))
+	  ;; Show keyboard layout if the current package requests it..
+	  (when (quail-show-layout)
+	    (insert
+"Physical key layout for this input method is as below.
+You can input a character in the table by typing a key
+at the same location on your keyboard.\n")
+	    (setq done-list
+		  (quail-insert-kbd-layout quail-keyboard-layout))
+	    (insert "It is assumed that your keyboard type is `")
+	    (help-insert-xref-button
+	     quail-keyboard-layout-type
+	     #'quail-show-keyboard-layout quail-keyboard-layout-type
+	     "mouse-2, RET: show this layout")
+	    (insert "'.
+If the layout is different from your keyboard, or you see the
+different characters when you type keys according to this layout,
+adjust the variable `quail-keyboard-layout-type' ")
+	    (help-insert-xref-button
+	     "[customize it]"
+	     #'customize-variable 'quail-keyboard-layout-type
+	     "mouse-2, RET: set keyboard layout type")
+	    (insert ".\n"))
+
+	  ;; Show key sequences.
+	  (let ((decode-map (list 'decode-map))
+		elt pos num)
+	    (setq num (quail-build-decode-map (quail-map) "" decode-map
+					      0 512 done-list))
+	    (when (> num 0)
+	      (insert ?\n)
+	      (if (quail-show-layout)
+		  (insert "You can also input more characters")
+		(insert "You can input characters"))
+	      (insert " by the following key sequences:\n")
+	      (quail-insert-decode-map decode-map))))
+
 	(quail-help-insert-keymap-description
 	 (quail-translation-keymap)
-	 (format "--- Key bindings%s ---\n"
-		 (if (quail-conversion-keymap)
-		     " (while translating)"
-		   "")))
+	 "--- key bindings for selecting a character ---\n")
+	(insert ?\n)
 	(if (quail-conversion-keymap)
 	    (quail-help-insert-keymap-description
 	     (quail-conversion-keymap)
-	     "\n--- Key bindings (while converting) ---\n"))
+	     "--- Key bindings for converting a character (sequence) ---\n"))
 	(setq quail-current-package nil)
 	(help-setup-xref (list #'quail-help package)
 			 (interactive-p))))))
 
 (defun quail-help-insert-keymap-description (keymap &optional header)
-  (let (pos)
+  (let (pos1 pos2 eol)
+    (setq pos1 (point))
     (if header
 	(insert header))
-    (setq pos (point))
     (insert (substitute-command-keys "\\{keymap}"))
-    (goto-char pos)
-    (while (search-forward "quail-other-command" nil 'move)
-      (delete-region (line-beginning-position) (1+ (line-end-position))))))
-
-(defun quail-show-kbd-layout ()
-  "Show keyboard layout with key tops of multilingual characters."
-  (insert "--- Keyboard layout ---\n")
-  (let ((blink-matching-paren nil)
-	(i 0)
-	ch)
-    (while (< i quail-keyboard-layout-len)
-      (if (= (% i 30) 0)
-	  (progn
-	    (newline)
-	    (indent-to (/ i 30)))
-	(if (= (% i 2) 0)
-	    (insert "   ")))
-      (setq ch (aref quail-keyboard-layout i))
-      (when (and (quail-kbd-translate)
-		 (/= ch ?\ ))
-	;; This is the case that the current input method simulates
-	;; some keyboard layout (which means it requires keyboard
-	;; translation) and a key at location `i' exists on users
-	;; keyboard.  We must translate that key by
-	;; `quail-keyboard-layout-standard'.  But if if there's no
-	;; corresponding key in that standard layout, we must simulate
-	;; what is inserted if that key is pressed by setting CH a
-	;; minus value.
-	(setq ch (aref quail-keyboard-layout-standard i))
-	(if (= ch ?\ )
-	    (setq ch (- (aref quail-keyboard-layout i)))))
-      (if (< ch 0)
-	  (let ((last-command-event (- ch)))
-	    (self-insert-command 1))
-	(if (= ch ?\ )
-	    (insert ch)
-	  (let* ((map (cdr (assq ch (cdr (quail-map)))))
-		 (translation (and map (quail-get-translation 
-					(car map) (char-to-string ch) 1))))
-	    (if (integerp translation)
-		(insert translation)
-	      (if (consp translation)
-		  (insert (aref (cdr translation) (car (car translation))))
-		(let ((last-command-event ch))
-		  (self-insert-command 1)))))))
-      (setq i (1+ i))))
-  (newline))
+    (goto-char pos1)
+    ;; Skip headers "--- key bindings ---", etc.
+    (forward-line 3)
+    (setq pos2 (point))
+    (with-syntax-table emacs-lisp-mode-syntax-table
+      (while (re-search-forward "\\sw\\(\\sw\\|\\s_\\)+" nil t)
+	(let ((sym (intern-soft (buffer-substring (match-beginning 0)
+						  (point)))))
+	  (if (and sym (fboundp sym)
+		   (get sym 'quail-help-hide))
+	      (delete-region (line-beginning-position)
+			     (1+ (line-end-position)))))))
+    (goto-char pos2)
+    (while (not (eobp))
+      (if (looking-at "[ \t]*$")
+	  (delete-region (point) (1+ (line-end-position)))
+	(forward-line 1)))
+    (goto-char pos2)
+    (if (eobp)
+	(delete-region pos1 (point)))
+    (goto-char (point-max))))
 
 (defun quail-translation-help ()
   "Show help message while translating in Quail input method."
-- 
2.39.2