Deprecate intangible' and point-entered' properties

* lisp/emacs-lisp/cursor-sensor.el: New file.

* lisp/simple.el (pre-redisplay-functions): New hook.
(redisplay--pre-redisplay-functions): New function.
(pre-redisplay-function): Use it.
(minibuffer-avoid-prompt): Mark obsolete.
(redisplay--update-region-highlight): Adapt it to work as a function on
pre-redisplay-functions.

* lisp/cus-start.el (minibuffer-prompt-properties--setter): New fun.
(minibuffer-prompt-properties): Use it.  Use cursor-intangible rather
than point-entered to make the prompt intangible.

* lisp/forms.el: Move `provide' calls to the end.
(forms-mode): Don't use `run-hooks' on a local var.
(forms--make-format, forms--make-format-elt-using-text-properties):
Use cursor-intangible rather than `intangible'.
(forms-mode): Enable cursor-intangible-mode.

* lisp/isearch.el (isearch-mode): Use defvar-local.
(cursor-sensor-inhibit): Declare.
(isearch-mode): Set cursor-sensor-inhibit.
(isearch-done): Set it back.
(isearch-open-overlay-temporary, isearch-open-necessary-overlays)
(isearch-close-unnecessary-overlays): Don't bother with `intangible'
any more.

* lisp/ses.el (ses-localvars): Remove `mode-line-process'.
(ses-sym-rowcol, ses-cell-value, ses-col-width, ses-col-printer):
Add Edebug spec.
(ses-goto-print, ses-print-cell, ses-adjust-print-width)
(ses-goto-data, ses-setup, ses-copy-region): Don't let-bind
inhibit-point-motion-hooks any more.
(ses--cell-at-pos, ses--curcell): New functions, extracted from
ses-set-curcell.
(ses-set-curcell): Use them.
(ses-print-cell, ses-setup): Use cursor-intangible instead of
`intangible'.  Make sure cursor-intangible isn't sticky at BOB.
(ses-print-cell-new-width, ses-reprint-all, ses-recalculate-all):
Use ses--cell-at-pos.
(ses--mode-line-process, ses--cursor-sensor-highlight): New functions,
extracted from ses-command-hook.  Make them work with multiple windows
displaying the same buffer.
(ses-mode): Use them via mode-line-process and pre-redisplay-functions.
Enable cursor-intangible-mode.
(ses-command-hook): Remove cell highlight and mode-line update code.
(ses-forward-or-insert, ses-copy-region-helper, ses-sort-column):
Update for new name of text-property holding the cell name.
(ses-rename-cell): Don't mess with mode-line-process.

* lisp/erc/erc-stamp.el (erc-add-timestamp): Use the new
cursor-sensor-functions property instead of point-entered.
(erc-insert-timestamp-right, erc-format-timestamp):
Use cursor-intangible rather than `intangible'.
(erc-munge-invisibility-spec): Use add-to-invisibility-spec and
remove-from-invisibility-spec.  Enable cursor-intangible-mode and
cursor-sensor-mode if needed.
(erc-echo-timestamp): Adapt to calling convention of
cursor-sensor-functions.
(erc-insert-timestamp-right): Remove unused vars `current-window' and
`indent'.

* lisp/gnus/gnus-group.el (gnus-tmp-*): Declare.
(gnus-update-group-mark-positions): Remove unused `topic' var.
(gnus-group-insert-group-line): Remove unused var `header'.
(gnus-group--setup-tool-bar-update): New function.
(gnus-group-insert-group-line): Use it.
(gnus-group-update-eval-form): Declare local
dynamically-bound variables.
(gnus-group-unsubscribe-group): Use \` and \' to match string bounds.

* lisp/gnus/gnus-topic.el (gnus-topic-jump-to-topic)
(gnus-group-prepare-topics, gnus-topic-update-topic)
(gnus-topic-change-level, gnus-topic-catchup-articles)
(gnus-topic-remove-group, gnus-topic-delete, gnus-topic-indent):
Use inhibit-read-only.
(gnus-topic-prepare-topic): Use gnus-group--setup-tool-bar-update.
(gnus-topic-mode): Use define-minor-mode and derived-mode-p.

* lisp/textmodes/reftex-index.el (reftex-display-index):
Use cursor-intangible-mode if available.
(reftex-index-post-command-hook): Check cursor-intangible.

* lisp/textmodes/reftex-toc.el (reftex-toc):
Use cursor-intangible-mode if available.
(reftex-toc-recenter, reftex-toc-post-command-hook):
Check cursor-intangible.

* lisp/textmodes/sgml-mode.el: Use lexical-binding.
(sgml-tag): Use cursor-sensor-functions instead of point-entered.
(sgml-tags-invisible): Use with-silent-modifications and
inhibit-read-only.  Enable cursor-sensor-mode.
(sgml-cursor-sensor): Rename from sgml-point-entered and adjust to
calling convention of cursor-sensor-functions.

* lisp/textmodes/table.el (table-cell-map-hook, table-load-hook)
(table-point-entered-cell-hook, table-point-left-cell-hook):
Don't autoload.
(table-cell-entered-state): Remove var.
(table--put-cell-point-entered/left-property)
(table--remove-cell-properties):
Use cursor-sensor-functions rather than point-entered/left.
(table--point-entered/left-cell-function): Merge
table--point-entered-cell-function and table--point-left-cell-function
and adjust to calling convention of cursor-sensor-functions.

lisp/erc/erc-stamp.el

@@ -114,7 +114,7 @@ If `erc-timestamp-format' is set, this will not be used."
 		 (string)))
 
 (defcustom erc-insert-away-timestamp-function
-  'erc-insert-timestamp-left-and-right
+  #'erc-insert-timestamp-left-and-right
   "Function to use to insert the away timestamp.
 
 See `erc-insert-timestamp-function' for details."
@@ -161,12 +161,12 @@ from entering them and instead jump over them."
 ;;;###autoload (autoload 'erc-timestamp-mode "erc-stamp" nil t)
 (define-erc-module stamp timestamp
   "This mode timestamps messages in the channel buffers."
-  ((add-hook 'erc-mode-hook 'erc-munge-invisibility-spec)
-   (add-hook 'erc-insert-modify-hook 'erc-add-timestamp t)
-   (add-hook 'erc-send-modify-hook 'erc-add-timestamp t))
-  ((remove-hook 'erc-mode-hook 'erc-munge-invisibility-spec)
-   (remove-hook 'erc-insert-modify-hook 'erc-add-timestamp)
-   (remove-hook 'erc-send-modify-hook 'erc-add-timestamp)))
+  ((add-hook 'erc-mode-hook #'erc-munge-invisibility-spec)
+   (add-hook 'erc-insert-modify-hook #'erc-add-timestamp t)
+   (add-hook 'erc-send-modify-hook #'erc-add-timestamp t))
+  ((remove-hook 'erc-mode-hook #'erc-munge-invisibility-spec)
+   (remove-hook 'erc-insert-modify-hook #'erc-add-timestamp)
+   (remove-hook 'erc-send-modify-hook #'erc-add-timestamp)))
 
 (defun erc-add-timestamp ()
   "Add timestamp and text-properties to message.
@@ -188,7 +188,8 @@ or `erc-send-modify-hook'."
       (add-text-properties (point-min) (point-max)
 			   (list 'timestamp ct))
       (add-text-properties (point-min) (point-max)
-			   (list 'point-entered 'erc-echo-timestamp)))))
+			   (list 'cursor-sensor-functions
+				 (list #'erc-echo-timestamp))))))
 
 (defvar erc-timestamp-last-inserted nil
   "Last timestamp inserted into the buffer.")
@@ -289,8 +290,7 @@ be printed just before the window-width."
     (setq erc-timestamp-last-inserted string)
     (goto-char (point-max))
     (forward-char -1);; before the last newline
-    (let* ((current-window (get-buffer-window (current-buffer)))
-	   (str-width (string-width string))
+    (let* ((str-width (string-width string))
 	   (pos (cond
 		 (erc-timestamp-right-column erc-timestamp-right-column)
 		 ((and (boundp 'erc-fill-mode)
@@ -303,8 +303,7 @@ be printed just before the window-width."
 		 (t
 		  (- (window-width) str-width 1))))
 	   (from (point))
-	   (col (current-column))
-	   indent)
+	   (col (current-column)))
       ;; The following is a kludge used to calculate whether to move
       ;; to the next line before inserting a stamp.  It allows for
       ;; some margin of error if what is displayed on the line differs
@@ -319,9 +318,9 @@ be printed just before the window-width."
       (erc-put-text-property from (point) 'field 'erc-timestamp)
       (erc-put-text-property from (point) 'rear-nonsticky t)
       (when erc-timestamp-intangible
-	(erc-put-text-property from (1+ (point)) 'intangible t)))))
+	(erc-put-text-property from (1+ (point)) 'cursor-intangible t)))))
 
-(defun erc-insert-timestamp-left-and-right (string)
+(defun erc-insert-timestamp-left-and-right (_string)
   "This is another function that can be assigned to
 `erc-insert-timestamp-function'.  If the date is changed, it will
 print a blank line, the date, and another blank line.  If the time is
@@ -356,7 +355,7 @@ Return the empty string if FORMAT is nil."
 	;; inelegant, hack. -- BPT
 	(and erc-timestamp-intangible
 	     (not erc-hide-timestamps)	; bug#11706
-	     (erc-put-text-property 0 (length ts) 'intangible t ts))
+	     (erc-put-text-property 0 (length ts) 'cursor-intangible t ts))
 	ts)
     ""))
 
@@ -366,15 +365,13 @@ Return the empty string if FORMAT is nil."
 ;; please modify this function and move it to a more appropriate
 ;; location.
 (defun erc-munge-invisibility-spec ()
+  (and erc-timestamp-intangible (not (bound-and-true-p cursor-intangible-mode))
+       (cursor-intangible-mode 1))
+  (and erc-echo-timestamps (not (bound-and-true-p cursor-sensor-mode))
+       (cursor-sensor-mode 1))
   (if erc-hide-timestamps
-      (setq buffer-invisibility-spec
-	    (if (listp buffer-invisibility-spec)
-		(cons 'timestamp buffer-invisibility-spec)
-	      (list 't 'timestamp)))
-    (setq buffer-invisibility-spec
-	  (if (listp buffer-invisibility-spec)
-	      (remove 'timestamp buffer-invisibility-spec)
-	    (list 't)))))
+      (add-to-invisibility-spec 'timespec)
+    (remove-from-invisibility-spec 'timespec)))
 
 (defun erc-hide-timestamps ()
   "Hide timestamp information from display."
@@ -405,12 +402,11 @@ enabled when the message was inserted."
 	    (erc-munge-invisibility-spec)))
 	(erc-buffer-list)))
 
-(defun erc-echo-timestamp (before now)
-  "Print timestamp text-property of an IRC message.
-Argument BEFORE is where point was before it got moved and
-NOW is position of point currently."
-  (when erc-echo-timestamps
-    (let ((stamp (get-text-property now 'timestamp)))
+(defun erc-echo-timestamp (window _before dir)
+  "Print timestamp text-property of an IRC message."
+  (when (and erc-echo-timestamps (eq 'entered dir))
+    (let* ((now (window-point window))
+	   (stamp (get-text-property now 'timestamp)))
       (when stamp
 	(message "%s" (format-time-string erc-echo-timestamp-format
 					  stamp))))))