* src/dispextern.h (struct it): New 'narrowed_begv' field.
* src/dispextern.h (WITH_NARROWED_BEGV): New macro.
* src/xdisp.c (get_narrowed_begv): New function.
(init_iterator): Initilize the 'narrowed_begv' field.
(back_to_previous_line_start, get_visually_first_element,
move_it_vertically_backward): Use the new macro.
* src/dispextern.h: Prototype of 'get_narrowed_begv'.
* src/window.c (window_body_height): Make it externally visible.
* src/window.h: Prototype of 'window_body_height'.
* src/composite.c (find_automatic_composition): Optimize display in buffers
with very long lines with 'get_narrowed_begv'.
* lisp/obsolete/longlines.el: Reobsolete longlines-mode.
* etc/NEWS: Announce the new minor mode, and remove the unobsoletion
indication for 'longlines-mode'.
* doc/emacs/trouble.texi (Long Lines): Remove the section.
(Lossage): Remove the entry for the Long Lines section.
* doc/emacs/emacs.texi (Top): Remove the entry for the Long Lines section.
* lisp/files.el (auto-narrow--reset-isearch-lazy-highlight): New internal
function.
(auto-narrow-pre-command-function, auto-narrow-post-command-function): Use the
new internal function.
* lisp/isearch.el (isearch-search): Set isearch-lazy-highlight to nil before
widening in auto-narrow-mode.
* lisp/files.el (auto-narrow--isearch-lazy-highlight): New internal variable.
(auto-narrow-pre-command-function, auto-narrow-post-command-function): Use it.
* lisp/files.el (auto-narrow-display-length): Improve docstring.
(auto-narrow-widen-automatically): Add 'undo' to the command list.
(auto-narrow-hook): New defcustom.
(auto-narrow-pre-command-function, auto-narrow-post-command-function):
Move initialization code.
(auto-narrow-mode): Do not make the 'auto-narrow-mode' permanent local
anymore.
* lisp/font-lock.el (turn-off-font-lock-mode): New convenience function.
* src/xdisp.c (set_vertical_scroll_bar): Fix typo.
(redisplay_window): Use the new convenience function.
* src/buffer.h (BUFFER_NEEDS_AUTO_NARROWING_P,
BUFFER_AUTO_NARROWED_NON_NARROWED_P): Two new convenience functions.
* src/window.c (Frecenter): Do not recenter auto-narrowed buffers that
are not actually narrowed.
* etc/NEWS: Improvement.
* doc/emacs/display.texi (Auto-Narrowing): Improvement.
* lisp/files.el (auto-narrow-mode): New minor mode.
(auto-narrow-pre-command-function, auto-narrow-post-command-function):
New auxiliary functions for the minor mode.
(auto-narrow-display-length, auto-narrow-widen-automatically): New
defcustoms for the minor mode.
(auto-narrow--widen-automatically, auto-narrow--isearch-widen-automatically,
auto-narrow--initialized): New internal variables for the minor mode.
* src/buffer.h (struct buffer): New internal variable for the minor mode.
(bset_auto_narrow__narrowing_state, BUFFER_AUTO_NARROWED_P): New
auxiliary functions.
* src/buffer.c (init_buffer_once, syms_of_buffer): New internal variable
for the minor mode. Update the docstring of mode-line-format.
* src/fileio.c (Finsert_file_contents): Detect whether the minor mode should
be entered when the buffer is displayed.
(syms_of_fileio): New defcustom for the minor mode.
* src/keyboard.c (syms_of_keyboard): New hook functions for the minor mode.
(command_loop_1): Execute the hook functions.
* src/xdisp.c (redisplay_window): Enter the minor mode when the buffer is
displayed.
(decode_mode_spec): Indicate when the minor mode is active
in the modeline. Indicate the buffer position relative to the whole buffer.
(set_vertical_scroll_bar): Indicate the buffer position relative to the
whole buffer.
(syms_of_xdisp): Two new symbols.
* lisp/isearch.el (isearch-widen-automatically): New defcustom.
(isearch-search): Use the new defcustom.
* lisp/bindings.el (mode-line-modes): Do not propertize the indication
in the modeline when the new minor mode is active.
* etc/NEWS: Announce the new minor mode, and remove the unobsoletion
indication for 'longlines-mode'.
* lisp/longlines.el: Reobsolete longlines-mode.
* doc/emacs/display.texi (Auto-Narrowing): New section, describing the new
minor mode.
(Display): Entry for the new section.
* doc/emacs/trouble.texi (Long Lines): Remove the section.
(Lossage): Remove the entry for the Long Lines section.
* doc/emacs/emacs.texi (Top): Remove the entry for the Long Lines section.
* lisp/files.el (remote-file-name-inhibit-auto-save-visited):
Rename from 'auto-save-visited-remote-files' and invert logic.
(auto-save-visited-mode): Adjust accordingly. (Bug#41333)
Suggested by Michael Albinus <michael.albinus@gmx.de>.
* lisp/cus-edit.el (setopt--set): Mark the variable for checking.
* lisp/custom.el (custom-initialize-reset): Give a warning if the
type is wrong (bug#56400).
* lisp/wid-edit.el (widget-convert): Autoload.
* lisp/replace.el (read-regexp-map): New map.
(read-regexp--case-fold, read-regexp-toggle-case-folding)
(read-regexp): Factor out to avoid hard-coding `M-c'.
* lisp/files.el (auto-save-visited-remote-files): New user option.
(auto-save-visited-mode): Use above new variable to decide whether
or not to save remote files. (Bug#41333)
* lisp/files.el (auto-save-visited-mode-predicate): New defcustom.
(auto-save-visited-mode): Use above new variable as a predicate to
decide whether or not to save a buffer.
* lisp/international/emoji.el (emoji-insert): Remove the prefix
action from this command, since the same is already available on
`C-x 8 e s', and we're considering using the prefix to copy to the
kill ring.
This fixes things with programs that have a very timeout, such
as Chromium, within which it isn't practical for the user to
confirm the default file name.
* lisp/x-dnd.el (x-dnd-direct-save-function): Add new choices to
defcustom.
(x-dnd-init-frame): Use fast protocol requests.
(x-dnd-save-direct-immediately): New function.
(x-dnd-handle-xds-drop): Fix nil values of selected file name.
* lisp/net/eudc.el (eudc-translate-query): new optional parameter to
reverse the mapping direction
(eudc-translate-attribute-list): new optional parameter to
reverse the mapping direction
* doc/lispref/keymaps.texi (Inheritance and Keymaps): Document
using 'make-composed-keymap' with 'defvar-keymap'.
* lisp/help-mode.el (help-mode-map): Use defvar-keymap to make this
code match the above documentation change.
This is shorter, simplifies use inside rx expressions, and removes
need for eval-when-compile elsewhere (for later exploitation).
* lisp/emacs-lisp/lisp-mode.el (lisp-mode-symbol): New rx-define.
(lisp-mode-symbol-regexp): Redefine using lisp-mode-symbol.
(lisp-imenu-generic-expression, lisp--el-match-keyword)
(lisp-fdefs, lisp-string-in-doc-position-p):
* lisp/emacs-lisp/checkdoc.el (checkdoc--error-bad-format-p):
* lisp/emacs-lisp/shorthands.el (shorthands-font-lock-shorthands):
Use lisp-mode-symbol instead of lisp-mode-symbol-regexp.
* lisp/view.el (view-old-Helper-return-blurb): Make obsolete.
(view--enable, view--disable): Delete remaining Helper-help support
code; view-mode stopped using it in 1995.
* doc/lispref/files.texi (Directory Names):
* lisp/files.el (file-parent-directory): Improve wording of the
documentation of 'file-parent-directory'. (Bug#56355)
* lisp/thumbs.el (thumbs-call-convert): Pass 'action-prefix' and
'action' as a combined parameter. Do not pass 'arg' if it is nil.
(thumbs-modify-image): Do not pass "" as 'arg' to
'thumbs-call-convert' (bug#56375).
Some time in the past this was converted from using the shell to
passing the parameters directly, but the fallout was not handled
correctly.
* lisp/help-fns.el (help-fns-edit-mode-cancel): New command.
(help-fns--edit-value-mode-map): Bind it to 'C-c C-k'.
(help-fns-edit-variable): Advertise it in help text.
