Fix preserving selections if `x-lost-selection-functions' signals

* src/xterm.c (x_preserve_selections): Get selection owner and
run lost selection hook separately.

Merge from origin/emacs-28

9183d1672c ; * etc/PROBLEMS: Give a URL for bug#50666.
1f508a8b6f etc/PROBLEMS: Describe issues with native compilation on C...
84a5d47125 ; Fix last change
0461021893 ; * lisp/emacs-lisp/comp.el (native-comp-speed): Explain t...
876317271b * lisp/find-dired.el (find-dired): Doc fix; add crossrefer...

Try to save selections from being disowned during frame deletion

* lisp/cus-start.el (standard): Add
`x-auto-preserve-selections'.
* src/xselect.c (x_clear_frame_selections): Collect deleted
selections into a variable and preserve them.
* src/xterm.c (x_preserve_selections): New function.
(syms_of_xterm): New variable `x-auto-preserve-selections'.
* src/xterm.h: Update prototypes.

; * lisp/textmodes/rst.el: Delete stale comment.

* lisp/mail/mail-utils.el (mail-string-delete): Make obsolete.

; * etc/PROBLEMS: Give a URL for bug#50666.

etc/PROBLEMS: Describe issues with native compilation on Cygwin

Prefer defvar-keymap in thumbs.el

* lisp/thumbs.el (thumbs-mode-map, thumbs-view-image-mode-map):
Prefer defvar-keymap.

Remove obsolete uses of obsolete functions

* src/minibuf.c (minibuf_conform_representation): Remove.
(Ftry_completion): Don't call it.
(Ftest_completion): Don't use the obsolete Fstring_make_unibyte or
Fstring_make_multibyte; they don't serve any useful purpose here.
We don't try to equate unibyte and multibyte raw bytes in symbol
lookups elsewhere and there is no reason to do it here.

Remove dead branch from substitute-command-keys

* lisp/help.el (substitute-command-keys): Remove dead branch;
where-is-internal will follow any remaps for us.  Note also that the
test case for remapping still pass.

Make `g' in `vc-annotate' not bug out

* lisp/vc/vc-annotate.el (vc-annotate): Don't bug out on `g'
(bug#48359).

Only reset buffer-local buffer-stale-function in make-indirect-buffer

* src/buffer.c (Fmake_indirect_buffer): Don't set the global
buffer-stale-function (bug#48348).

; Fix last change

* doc/lispref/compile.texi (Native-Compilation Variables): Explain
better what the value -1 of 'native-comp-speed' means.

; * lisp/emacs-lisp/comp.el (native-comp-speed): Explain the -1 value.

Document the recent add-global-abbrev change

* doc/emacs/abbrevs.texi (Defining Abbrevs): Document that you can
use the active region.

Make add-mode-abbrev use the active region

* lisp/abbrev.el (add-mode-abbrev, add-global-abbrev): Document it.
(add-abbrev): If there's an active region, use that as the
expansion (bug#56496).

; * etc/NEWS: Announce obsoletion of rlogin.el.

* lisp/obsolete/rlogin.el: Add "Obsolete-since" line.

Make net/rlogin.el obsolete

* lisp/net/rlogin.el: Move from here...
* lisp/obsolete/rlogin.el: ...to here.  (Bug#56461)

* src/.lldbinit: Fix copyright year.

Allow commands that call `yes-or-no-p' to be repeatable again

* lisp/subr.el (y-or-n-p): Enable commands that call this function
to be repeatable (bug#45999).  This stopped working after this
function started using read-from-minibuffer.
* src/fns.c (Fyes_or_no_p): Ditto.

Move EIEIO autoloads to the common loaddefs.el

* lisp/emacs-lisp/eieio-core.el:
* lisp/emacs-lisp/eieio-custom.el:
* lisp/emacs-lisp/eieio-opt.el:
* lisp/obsolete/eieio-compat.el: Remove generated-autoload-file
setting and don't require eieio-loaddefs.el.

Support for debugging Emacs with LLDB

* (src/.lldbinit): New file.
* (etc/emacs_lldb.py): Module loaded from .lldbinit.

Don't create unused file rmail-loaddefs.el

* lisp/mail/undigest.el: Remove 'generated-autoload-file' local
variable.  (Bug#56491)

Simplify str_to_multibyte and related code

* src/character.h (str_to_multibyte):
* src/character.c (str_to_multibyte): Remove `nbytes` argument; return
it instead.  Copy forwards.
* src/fns.c (concat_to_string, Fstring_make_multibyte):
Use str_to_multibyte.
(string_make_multibyte): Remove.
(string_to_multibyte):
* src/print.c (print_string):  Adapt calls.

Doc fix; don't mention rlogin

* doc/emacs/misc.texi (Remote Host):
* doc/misc/eshell.texi (Bugs and ideas): Don't mention
rlogin.  (Bug#56461)

Improve behavior of `lost-selection-mode' with multiple buffers

* etc/NEWS: Announce new hook `post-select-region-hook'.

* lisp/select.el (lost-selection-last-region-buffer): New
variable.
(lost-selection-post-select-region-function): New function.
Deactivate the mark if the buffer changed.
(lost-selection-mode): Add new hook.

* src/keyboard.c (command_loop_1): Run that hook when
appropriate.
(syms_of_keyboard): New hook `post-select-region-hook'.

Fix crm.el compilation warning

* lisp/emacs-lisp/crm.el (crm-default-separator): Move to avoid
compilation warning.

Don't call home from test/src/process-tests.el

* test/src/process-tests.el (process-num-processors): Move from
here...
* test/manual/process-callout-tests.el: ... to here (bug#55858).

Make mouse-2 respect delete-selection mode

* lisp/delsel.el: Make the mouse yank commands delete-selection-mode
aware (bug#56421).

* lisp/emacs-lisp/package.el (define-package): Make obsolete.

Prevent setting user time if the WM doesn't support it

* src/xterm.c (x_update_frame_user_time_window): Don't set
_NET_WM_USER_TIME if it's not supported by the window manager.

Add test for the gradle-android compilation message pattern

* etc/compilation.txt (symbol): Add example.
* test/lisp/progmodes/compile-tests.el (compile-tests--test-regexps-data):
(compile-test-error-regexps): Add test case (bug#56249).

Fix memory leak in ns_draw_relief

* src/nsterm.h (struct ns_output): New fields to store the relief
colors.
* src/nsterm.m (ns_setup_relief_colors): New function to keep the
relief colors as part of the ns_output structure.
(ns_draw_relief): Remove static local variables.  Assigning them to
nil caused a memory leak of NSColor instances (bug#56462).  Call
ns_setup_relief_colors instead.

Autoload named-let

* lisp/emacs-lisp/subr-x.el (named-let): Autoload `named-let' for
easier use (bug#56473).

Fix `M-x lisp-fill-paragraph'

* lisp/emacs-lisp/lisp-mode.el (lisp-fill-paragraph): Fix filling
when called directly with `M-x lisp-fill-paragraph' instead of via
`M-q' (bug#56476).

Make crm-default-separator obsolete as per FIXME

* lisp/emacs-lisp/crm.el (crm-default-separator): Make into
obsolete variable alias for crm-separator.
(crm-separator): Update docstring for above change.

; * lwlib/xlwmenu.c (make_shadow_gcs): Remove "a = a" pattern.

* lwlib/xlwmenu.c (make_shadow_gcs): Remove code that sets a value
to itself (bug#56479).

* lisp/find-dired.el (find-dired): Doc fix; add crossreference.

Re-add comment on autoloading cookies in preloaded files

This comment was removed in 2009, but it is useful to explain why
we are keeping these autoload cookies.
* lisp/bindings.el:
* lisp/font-core.el:
* lisp/format.el:
* lisp/international/mule-cmds.el: Re-add comment on autoloading.
* lisp/font-core.el (font-lock-defaults): Re-add autoload cookie,
despite the fact that this file is preloaded.

Prefer :risky defcustom keyword

* lisp/align.el (align-region-separate, align-rules-list)
(align-exclude-rules-list, align-vhdl-rules-list):
* lisp/bindings.el (mode-line-percent-position):
* lisp/filesets.el (filesets-menu-cache-file, filesets-commands)
(filesets-external-viewers, filesets-ingroup-patterns)
(filesets-data):
* lisp/hi-lock.el (hi-lock-file-patterns-policy):
* lisp/mail/mailalias.el (mail-complete-alist)
(mail-directory-process, mail-directory-stream)
(mail-directory-parser):
* lisp/mail/rmail.el (rmail-confirm-expunge):
* lisp/mail/sendmail.el (mail-signature):
* lisp/mail/supercite.el (sc-cite-frame-alist)
(sc-uncite-frame-alist, sc-recite-frame-alist)
(sc-default-cite-frame, sc-default-uncite-frame)
(sc-default-recite-frame, sc-attrib-selection-list)
(sc-rewrite-header-list):
* lisp/progmodes/make-mode.el (makefile-special-targets-list):
* lisp/so-long.el (so-long-action-alist):
* lisp/textmodes/sgml-mode.el (sgml-tag-alist): Prefer defcustom
:risky keyword argument to directly setting the 'risky-local-variable'
symbol property.

Simplify and speed up string-to-multibyte

* src/character.h (str_to_multibyte):
* src/character.c (str_to_multibyte): Change signature and simplify;
the conversion is no longer done in-place.
* src/fns.c (string_to_multibyte): Drop temporary buffer and memcpy;
adapt to new str_to_multibyte signature.
* src/print.c (print_string): Drop memcpy; adapt call to str_to_multibyte.
* test/src/fns-tests.el (fns--string-to-unibyte): Rename to...
(fns--string-to-unibyte-multibyte): ... this and strengthen, so that
the test covers string-to-multibyte reasonably well.

Rename 'longlines-breakpoint-chars' to 'longlines-break-chars'

* etc/NEWS:
* lisp/longlines.el (longlines-break-chars): Rename
'longlines-breakpoint-chars' to 'longlines-break-chars'
(bug#56335).

Handle errors sending selection decline events asynchronously

* src/xselect.c (x_decline_selection_request): Handle errors
asynchronously.
* src/xterm.c (x_ignore_errors_for_next_request)
(x_stop_ignoring_errors): Export functions.
* src/xterm.h: Update prototypes.

* time-date.el (decoded-time-period): Rename TIME in docstring

; * lisp/emacs-lisp/ert-x.el (tramp-remote-path): Fix last change.

Remove some ineffectual calls to purecopy

* lisp/dired.el (dired-chown-program, dired-trivial-filenames):
* lisp/emacs-lisp/shortdoc.el (shortdoc--display-function):
* lisp/help-fns.el (help-fns--mention-shortdoc-groups):
* lisp/mail/mail-extr.el (mail-extr-full-name-prefixes)
(mail-extr-all-letters-but-separators, mail-extr-all-letters)
(mail-extr-first-letters, mail-extr-last-letters)
(mail-extr-bad-dot-pattern, mail-extr-full-name-suffix-pattern)
(mail-extr-alternative-address-pattern)
(mail-extr-trailing-comment-start-pattern)
(mail-extr-name-pattern, mail-extr-telephone-extension-pattern)
(mail-extr-ham-call-sign-pattern, mail-extr-normal-name-pattern)
(mail-extr-two-name-pattern)
(mail-extr-listserv-list-name-pattern)
(mail-extr-stupid-vms-date-stamp-pattern)
(mail-extr-hz-embedded-gb-encoded-chinese-pattern)
(mail-extr-x400-encoded-address-pattern)
(mail-extr-x400-encoded-address-field-pattern-format)
(mail-extr-x400-encoded-address-surname-pattern)
(mail-extr-x400-encoded-address-given-name-pattern)
(mail-extr-x400-encoded-address-full-name-pattern): Remove
ineffectual calls to purecopy.

Rename new option to browse-url-default-scheme

* lisp/net/browse-url.el (browse-url-default-scheme): Rename from
'browse-url-guess-default-scheme'.  Update caller.
Suggested by Eli Zaretskii <eliz@gnu.org>.

Speed up string-to-unibyte

* src/character.h (str_to_unibyte):
* src/character.c (str_to_unibyte): Remove.
* src/fns.c (Fstring_to_unibyte): Ditch the call to str_to_unibyte and
the unnecessary heap allocation.  Write new, faster code.
* test/src/fns-tests.el (fns--string-to-unibyte): New test.

Fix Tramp test environment on hydra.nixos.org

* lisp/emacs-lisp/ert-x.el (tramp-remote-path): Declare.  Adapt
`tramp-remote-path' on hydra.  (Bug#56424)

* test/lisp/dnd-tests.el (dnd-tests-begin-drag-files): Remove instrumentation.

* test/lisp/filenotify-tests.el:
* test/lisp/shadowfile-tests.el:
* test/lisp/net/tramp-tests.el: Do not adapt `tramp-remote-path'.

Don't use purecopy in dictionary.el

* lisp/net/dictionary.el (dictionary-pre-buffer)
(dictionary-display-dictionary-line)
(dictionary-display-more-info, dictionary-display-strategy-line)
(dictionary-display-match-lines): Don't use purecopy; it has no
effect here.

* src/dired.c (directory_files_internal): Update comment

* src/dired.c (directory_files_internal): Fix bug#56469

Avoid concatenating encoded and decoded file names.

New user option browse-url-guess-default-scheme

* lisp/net/browse-url.el (browse-url-guess-default-scheme): New
user option.
(browse-url-url-at-point): Use above new user option.

; Use example.org in an example

* lisp/net/browse-url.el (browse-url-filename-alist): Use example.org
to be more RFC2606 compliant.

* doc/misc/tramp.texi (Frequently Asked Questions): Fix formatting.

Minor fixes to WM_DELETE_WINDOW handling

* src/xterm.c (handle_one_xevent): Only handle WM_DELETE_WINDOW
to toplevel windows, and set event timestamp.

Make browse-url.el support for plain "mozilla" obsolete

* lisp/net/browse-url.el (browse-url-mozilla-program)
(browse-url-mozilla-arguments)
(browse-url-mozilla-startup-arguments)
(browse-url-mozilla-new-window-is-tab, browse-url-mozilla)
(browse-url-mozilla-sentinel): Make obsolete.  (Bug#56464)
(browse-url--browser-defcustom-type, browse-url-default-browser):
Don't refer to above obsolete function 'browse-url-mozilla'.

* lisp/net/browse-url.el: Improve commentary.

; * test/lisp/dnd-tests.el (dnd-tests-begin-drag-files): Instrument.

; * lisp/startup.el (command-line-1): Fix last change.

Fix the startup.el behavior when 'face-font-rescale-alist' is non-nil

* lisp/startup.el (command-line-1, normal-top-level): Reset the
default face's font only if 'face-font-rescale-alist' affects that
face's font.  For the use case where it matters, see
https://lists.gnu.org/archive/html/emacs-devel/2022-07/msg00157.html.
Make the 'inhibit-startup-screen' and non-inhibit branches behave
the same in that case.

; * src/composite.c (Fcomposition_get_gstring): Fix compiler warnings.

Fix build with old sqlite libraries

* src/sqlite.c (Fsqlite_open): Don't use SQLITE_OPEN_FULLMUTEX
if not defined.

Speed up 'find_automatic_composition'

* src/composite.c (find_automatic_composition): Limit search
backward in buffers to the first newline.  Fix commentary.

Don't sync for errors setting up DND targets and toplevels

* src/xterm.c (xm_setup_dnd_targets, x_dnd_free_toplevels)
(x_dnd_compute_toplevels): Avoid catching errors synchronously.

Merge from origin/emacs-28

115261b323 ; Improve wording of recently-changed doc strings.

Make `x-no-window-manager' cover user time as well

* src/xterm.c (x_update_frame_user_time_window):
(x_wm_supports_1): Respect `x-no-window-manager'.  This makes
testing some features easier.

* test/Makefile.in (WRITE_LOG): Always be verbose on hydra.nixos.

Make STRING_SET_MULTIBYTE an inline function

* src/lisp.h (STRING_SET_MULTIBYTE): Make it into a function.

* src/composite.c (Fcomposition_get_gstring):
Prefer `make_multibyte_string` over Fconcat+STRING_SET_MULTIBYTE.

Exclude platform specific browsers from custom type

* lisp/net/browse-url.el (browse-url--browser-defcustom-type):
Don't include platform specific browsers on other platforms.

* lisp/net/eww.el (eww): Improve docstring.

Make browse-url-default-browser fall back to EWW

* lisp/net/browse-url.el (browse-url-default-browser): Fall back
to EWW.

Drop support for the dead third-party w3 package

The w3 package was removed from GNU ELPA in 2020 as it doesn't run on
a recent Emacs, and development had stopped over a decade before that.
If anyone wants to revive the w3 package, they should look this all
over, but it doesn't make sense for us to maintain this support code.
Ref: https://debbugs.gnu.org/25395

* lisp/net/browse-url.el (browse-url-w3): Make obsolete.
(browse-url--browser-defcustom-type)
(browse-url-default-browser):
* lisp/ffap.el (ffap-url-at-point, ffap-file-at-point):
* lisp/net/newst-plainview.el (newsticker--buffer-do-insert-text):
* lisp/net/newst-reader.el (newsticker-html-renderer)
(newsticker-show-news):
* lisp/net/newst-treeview.el (newsticker--treeview-render-text):
* lisp/org/ol.el (org-store-link):
* lisp/url/url.el (url-retrieve): Remove w3 support code and related
documentation and comments.  (Bug#56435)

* test/lisp/net/browse-url-tests.el
(browse-url-tests-browser-kind): Adjust test for above changes.

* etc/TODO: Remove TODO to install W3.
* doc/misc/org.org (Handling Links): Don't mention W3.
* lisp/msb.el (msb--few-menus, msb--very-many-menus): Check for
eww-mode instead of w3-mode.

Improve introductory section of TRAMP manual

* doc/misc/tramp.texi (Top, Overview): Explain what TRAMP is
without contrasting to Ange FTP.  (Bug#56440)
(Frequently Asked Questions): Move information on Ange FTP here.

Prefer defvar-keymap in net/*.el

* lisp/net/dictionary.el (dictionary-mode-map):
* lisp/net/dig.el (dig-mode-map):
* lisp/net/eudc-hotlist.el (eudc-hotlist-mode-map):
* lisp/net/eudc.el (eudc-mode-map):
* lisp/net/mairix.el (mairix-searches-mode-map):
* lisp/net/newst-treeview.el
(newsticker-treeview-list-sort-button-map)
(newsticker-treeview-mode-map):
* lisp/net/quickurl.el (quickurl-list-mode-map):
* lisp/net/rcirc.el (rcirc-mode-map)
(rcirc-multiline-minor-mode-map, rcirc-track-minor-mode-map):
* lisp/net/rlogin.el (rlogin-mode-map):
* lisp/net/secrets.el (secrets-mode-map):
* lisp/net/sieve-mode.el (sieve-mode-map):
* lisp/net/sieve.el (sieve-manage-mode-map):
* lisp/net/snmp-mode.el (snmp-mode-map):
* lisp/net/telnet.el (telnet-mode-map): Prefer defvar-keymap.

Avoid extra sync and atom name query on ending Motif DND

* src/xterm.c (handle_one_xevent): Use `x_dnd_action_symbol' to
set the Motif action instead.

Delete obsolete variable tooltip-use-echo-area

* lisp/tooltip.el (tooltip-use-echo-area): Delete variable
obsolete since 24.1.
(tooltip-help-tips):
* lisp/progmodes/gud.el (gud-tooltip-process-output)
(gud-tooltip-tips): Don't use above deleted variable.

* lisp/woman.el (woman-fill-column): Increase default to 70.

* lisp/mh-e/mh-mime.el (mh-small-show-buffer-p): Double value.

Delete obsolete variable font-lock-maximum-size

* lisp/font-lock.el (font-lock-maximum-size): Delete variable
obsolete since 24.1.
(font-lock-initial-fontify):
* lisp/mail/rmail.el (rmail-variables):
* lisp/mh-e/mh-mime.el (mh-small-show-buffer-p): Don't use above
deleted variable.
* lisp/font-core.el (font-lock-mode):
* lisp/font-lock.el:
* lisp/info.el: Don't mention above deleted variable.

; * lisp/emacs-lisp/cconv.el (cconv--var-classification): Optimise.

New command emacs-news-toggle-tag

* lisp/textmodes/emacs-news-mode.el (emacs-news-toggle-tag): New
command.
(emacs-news-mode-map): Bind above new command to "C-c C-t".
* test/lisp/textmodes/emacs-news-mode-resources/toggle-tag.erts:
* test/lisp/textmodes/emacs-news-mode-tests.el: New files.

Improve ert-test-erts-file documentation

* lisp/emacs-lisp/ert.el (ert-test-erts-file): Improve docstring.
* doc/misc/ert.texi (erts files): Fix typo.

Bind M-G unconditionally in Dired

* lisp/dired-x.el: Move dired-goto-subdir binding from here...
* lisp/dired.el (dired-mode-map): ...to here.  (Bug#21981)

* doc/misc/dired-x.texi (Miscellaneous Commands): Move
documentation of above command from here...
* doc/emacs/dired.texi (Subdirectory Motion): ...to here.

Move dired-buffer-more-recently-used-p to dired.el

* lisp/dired-x.el (dired-buffer-more-recently-used-p): Move from
here...
* lisp/dired.el (dired-buffer-more-recently-used-p): ...to here.

Delete obsolete variable buffer-substring-filters

* lisp/simple.el (buffer-substring-filters): Delete variable obsolete
since 24.1.
(buffer-substring--filter): Adjust for deleted variable.
* doc/lispref/text.texi (Buffer Contents): Adjust documentation
for deleted variable.

; Rename 'ffap--accept-or-reject-p'

* lisp/ffap.el (ffap-accept-or-reject-p): Renamed from
'ffap--accept-or-reject-p'; all users changed.  Doc fix.

Improve drag-and-drop emulation time handling

* src/xselect.c (x_handle_selection_request): Use
display-specific pending DND time.
(x_set_pending_dnd_time): Delete function.
* src/xterm.c (x_dnd_do_unsupported_drop, handle_one_xevent):
Set dpyinfo->pending_dnd_time instead.
* src/xterm.h (struct x_display_info): New field
`pending_dnd_time'.  Make handling pending drops
display-specific to avoid interference when there are multiple
displays.

; Improve wording of recently-changed doc strings.

* lisp/simple.el (auto-save-mode):
* lisp/files.el (auto-save-visited-mode): Improve wording of the
doc strings.

Fix race conditions handling selection clear events on Haiku

* src/haiku_select.cc (be_handle_clipboard_changed_message):
Include current clipboard count.
(be_selection_outdated_p): New function.
* src/haikuselect.c (haiku_handle_selection_clear): Ignore
outdated events.
(haiku_selection_disowned): New argument `count'.  Include it in
the timestamp field of the selection clear event.
* src/haikuselect.h: Update prototypes.
* src/systime.h: Define `Time' to an appropriate value on Haiku.

Merge from origin/emacs-28

3442de2edd Doc fix; don't mention obsolete variable
c4e251103b ; * lisp/textmodes/rst.el: Update URLs.

Fix redisplay after running selection hook on Haiku

* src/haikuselect.c (haiku_handle_selection_clear): Call
redisplay_preserve_echo_area.

Add new minor mode to deactivate the region once PRIMARY is lost

* doc/emacs/killing.texi (Primary Selection): Document new minor
mode `lost-selection-mode'.
* etc/NEWS: Announce new minor mode.
* lisp/select.el (lost-selection-function): New function.
(lost-selection-mode): New global minor mode.

; * message.el (message-auto-save-directory): Clarify docstring.

Speed up querying for window manager support

* src/xterm.c (handle_one_xevent): Clear net_supported_window if
it is destroyed.
(x_get_wm_check_window): New function.
(x_wm_supports_1): First try net_supported_window.  If it still
exists, don't ask for _NET_SUPPORTING_WM_CHECK.

Remove now unused parameter TRACK from do_switch_frame.

* src/lisp.h (extern do_swith_frame declaration)
* src/frame.c (do_switch_frame): Remove parameter TRACK and its comment.
* src/frame.c (Fselect_frame, Fhandle_switch_frame, delete_frame)
* src/keyboard.c (quit_throw_to_read_char)
* src/minibuf.c (read_minibuf_unwind (twice))
* src/window.c (Fset_window_configuration): Remove argument TRACK.

Doc fix; don't mention obsolete variable

* src/window.c (Fset_window_hscroll): Doc fix; don't mention obsolete
variable.

* lisp/isearch.el (isearch-search-fun-in-noncontiguous-region): New function.

(isearch-search-fun-in-text-property): Refactor body to
'search-within-boundaries', then call it (bug#14013).
(search-within-boundaries): New function refactored from
isearch-search-fun-in-text-property.

* test/lisp/isearch-tests.el: Add tests for new search functions.
(isearch--test-search-within-boundaries): New function.
(isearch--test-search-fun-in-text-property)
(isearch--test-search-fun-in-noncontiguous-region): New tests.

Display the number of invisible matches for isearch-lazy-count (bug#40808)

* lisp/isearch.el (lazy-count-invisible-format): New variable.
(isearch-mode): Set isearch-lazy-count-invisible to nil.
(isearch-lazy-count-format): Use lazy-count-invisible-format and
isearch-lazy-count-invisible.
(isearch-range-invisible): Handle the value 'can-be-opened' of
'search-invisible' and don't open overlays for it, just check
if these overlays can be opened.
(isearch-lazy-count-invisible): New variable.
(isearch-lazy-highlight-new-loop): Set isearch-lazy-count-invisible to nil.
(isearch-lazy-highlight-search): Let-bind search-invisible either to t
for non-nil isearch-lazy-count, or to 'can-be-opened'.
(isearch-lazy-highlight-match): Don't highlight matches intended
to be counted only, not highlighted.
(isearch-lazy-highlight-buffer-update): Separately count invisible
matches by isearch-lazy-count-invisible.

* lisp/info.el (Info-isearch-filter): Check if search-invisible is t.