* src/buffer.h (struct buffer_text): New field.
(BUF_CHARS_UNCHANGED_MODIFIED, CHARS_UNCHANGED_MODIFIED): New macros.
* src/buffer.c (Fget_buffer_create): Initialize the new field.
* src/xdisp.c (mark_window_display_accurate_1): Set the new field.
(redisplay_window): Use it, together with CHARS_MODIFF, instead of
MODIFF and UNCHANGED_MODIFIED to decide whether to check for long
lines.
* src/pdumper.c (dump_buffer): Dump the new field.
* src/xdisp.c (partial_line_height): Return zero for long and
truncated lines.
(fast_move_it_horizontally): New function.
(hscroll_window_tree, display_line): Use
'fast_move_it_horizontally' in preference to
'move_it_in_display_line_to', when dealing with long and truncated
lines.
(redisplay_internal): Optimize "optimization 3" for long and
truncated lines.
* src/buffer.c (syms_of_buffer) <large-hscroll-threshold>: New
variable.
* etc/NEWS: Announce 'large-hscroll-threshold'.
* src/xdisp.c (redisplay_window): Increase the threshold above which
long lines detection is performed in the buffer. This should avoid
triggering that detection for most simple editing operations.
* src/lisp.h (modiff_incr): Explain why the counter is incremented
logarithmically.
* src/buffer.h (struct buffer_text): Adapt the comment about the
'modiff' field accordingly.
* src/buffer.c (modify_overlay): Increase the counter by 1 instead of
the size of the buffer section on which the overlay is placed.
* etc/NEWS: Small improvement.
* src/lisp.h (modiff_incr): Add a parameter to 'modiff_incr' to record
the extent of the modification.
* src/insdel.c (insert_1_both, insert_from_string_1, insert_from_gap,
insert_from_buffer_1, adjust_after_replace, replace_range,
replace_range_2, del_range_2, modify_text): Add an argument to each
call to 'modiff_incr'.
* src/textprop.c (modify_text_properties): Add an argument to the call
to 'modiff_incr'.
* src/buffer.c (Frestore_buffer_modified_p, Fbuffer_swap_text,
modify_overlay): Add an argument to each call to 'modiff_incr'.
* src/xdisp.c (redisplay_window): Use the improved version of 'MODIFF'
for the heuristic.
* src/buffer.h (struct buffer_text): New 'unchanged_size' field.
(BUF_UNCHANGED_SIZE): New macro to access the field.
* src/buffer.c (Fget_buffer_create): Initialize the field.
(Fbuffer_swap_text): Handle it.
* src/xdisp.c (mark_window_display_accurate_1): Set the field.
(redisplay_window): Use the field for long lines detection.
* src/buffer.h (struct buffer): New field 'long_line_optimizations_p'.
* src/buffer.c (syms_of_buffer): New variable 'long-line-threshold'.
(reset_buffer): Initialize the 'long_line_optimizations_p' field.
(Fbuffer_swap_text): Handle it.
* src/xdisp.c (redisplay_window): Set 'long_line_optimizations_p' when
a buffer contains long lines.
(init_iterator): Use 'long_line_optimizations_p'.
(get_narrowed_begv): Update.
(SET_WITH_NARROWED_BEGV): New macro.
(unwind_narrowed_begv): New internal function used by the new macro.
(back_to_previous_line_start, get_visually_first_element,
move_it_vertically_backward): Use the new macro.
* src/search.c (find_newline1): Make it externally visible.
* src/lisp.h: Make 'find_newline1' externally visible.
* src/dispextern.h (struct it): Update comment. Remove the
'WITH_NARROWED_BEGV' macro.
* etc/NEWS: Mention the 'long-line-threshold' variable.
* src/buffer.c (Fmake_indirect_buffer): Kill the local
buffer-stale-function variable instead of setting it
buffer-locally to the default value. This should have the same
effect, but is less confusing.
* 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/loadup.el ("emacs-lisp/rmc"): Preload.
* lisp/simple.el (kill-buffer--possibly-save): New function to
offer to save the buffer before killing (bug#47075).
* src/buffer.c (Fkill_buffer): Call the new function to query the
user.
(syms_of_buffer): Define symbol.
This is mostly factored out from tabulated-list.el (with bugs fixed).
* doc/lispref/modes.texi (Header Lines): Document it.
* lisp/display-line-numbers.el (header-line-indent): New variable.
(header-line-indent--line-number-width)
(header-line-indent--watch-line-number-width)
(header-line-indent--window-scroll-function): New helper functions.
(header-line-indent-mode): New minor mode.
* lisp/display-line-numbers.el (header-line-indent-width): New
variable.
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-line-number-width)
(tabulated-list-watch-line-number-width)
(tabulated-list-window-scroll-function): Make into obsolete aliases.
(tabulated-list-mode): Use 'header-line-indent-mode'.
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-init-header):
Adjust the header line format and computation.
* src/buffer.c (syms_of_buffer): Mention header-line-indent-mode.
* doc/lispref/buffers.texi (Buffer Modification): Adjust
documentation.
* src/buffer.c (Frestore_buffer_modified_p): Fix up the logic
around `autosaved': It means "the buffer is modified, and also
autosaved".
* lisp/simple.el (get-scratch-buffer-create): New function, factored
out of scratch-buffer, and additionally clearing the modification flag
and calling substitute-command-keys (bug#55257).
(scratch-buffer):
* lisp/server.el (server-execute):
* lisp/startup.el (normal-no-mouse-startup-screen, command-line-1):
* lisp/window.el (last-buffer, window-normalize-buffer-to-switch-to):
* src/buffer.c (Fother_buffer, other_buffer_safely): Use it.
(syms_of_buffer): Add Qget_scratch_buffer_create.
* lisp/startup.el (startup--get-buffer-create-scratch): Delete
now-unused function.
* doc/lispref/os.texi (Summary: Sequence of Actions at Startup):
* NEWS (Incompatible changes in Emacs 29.1): Document the change.
* doc/lispref/buffers.texi (Buffer Modification): Document
buffer-modified-p returning `autosaved'.
* lisp/subr.el (with-silent-modifications): Use
restore-buffer-modified-p instead of altering the buffer modiff
(since this has other side effects like not updating after async
`display' changes.
* src/buffer.c (Fbuffer_modified_p): Allow returning whether the
buffer has been autosaved after changes.
(Frestore_buffer_modified_p): Allow adjusting whether the buffer
has been autosaved after changes.
* src/fileio.c (Fdo_auto_save): Refill the doc string.
* lisp/subr.el (with-silent-modifications): Use it to restore the
ticks (bug#11303).
* src/buffer.c (Finternal__set_buffer_modified_tick): New function.
* doc/emacs/buffers.texi (Indirect Buffers):
* src/buffer.c (syms_of_buffer) <clone-indirect-buffer-hook>:
Update the documentation of 'clone-indirect-buffer-hook' due the
recent changes.
* etc/NEWS: Mention the change in where the hook is run.
* lisp/face-remap.el (face-attrs--make-indirect-safe): Doc fix.
* lisp/face-remap.el (face-attrs--make-indirect-safe):
(clone-indirect-buffer-hook): Set up a face remapping alist
(bug#53294).
* lisp/simple.el (clone-indirect-buffer): Move the point the hook
is run.
* src/buffer.c (Fmake_indirect_buffer, syms_of_buffer): Move the
place where the clone-indirect-buffer-hook variable is defined, so
that we can call it from C.
* src/data.c (Fkill_local_variable):
* src/buffer.c (buffer_local_value): Use assq_no_quit instead of
Fassoc/Fassq on local_var_alist (bug#53242).
* src/data.c (Flocal_variable_p): Use assq_no_quit instead of
open-coding the search on local_var_alist.
This fixes bug#1338.
* src/buffer.c (Frename_buffer): Call `uniquify--rename-buffer-advice`.
* lisp/files.el (create-file-buffer):
Call`uniquify--create-file-buffer-advice`.
* lisp/uniquify.el (uniquify--rename-buffer-advice)
(uniquify--create-file-buffer-advice): Don't add them as advice any more.
Adjust their calling convention accordingly.
efb1cd7fa9 ; * etc/charsets/README: Update the format documentation.
cc796b7409 Tramp doc cleanup
a338d46060 Make emacs-lisp-byte-compile-and-load load the .elc file a...
3eac7dc780 Fix point movement in image-dired
4e9452a399 Improve shortdoc for vector
f223ac6ef9 Fix test bug when calloc returns null
ebeaa54f19 Pacify GCC 11 -fanalyzer on x86-64
56d1f42f30 Improve handling of non-character events in input methods
3fbe6fd367 ; Fix mistakes in last doc rewording about shorthands
* doc/emacs/display.texi (Line Truncation, Visual Line Mode):
* doc/lispref/display.texi (Truncation): Document that turning on
line truncation disables wrapping, and vice versa.
* src/buffer.c (syms_of_buffer) <truncate-lines>:
* src/xdisp.c (syms_of_xdisp) <truncate-partial-width-windows>:
Warn against turning on when 'visual-line-mode' is in effect.
* lisp/simple.el (visual-line-mode): Document that this mode
disables line truncation. (Bug#29664)
* doc/emacs/files.texi (Auto Save Files): Document it.
* lisp/cus-start.el (standard): Add customize form.
* lisp/files.el (delete-auto-save-files): Move definition to C
(since it's used in the C layer).
* src/buffer.c (Fkill_buffer): Use the new variable (and remove
the old code that apparently didn't trigger for
kill-buffer/delete-auto-save-files.
(syms_of_buffer): Add new variable
kill-buffer-delete-auto-save-files and move definition of
delete-auto-save-files here (bug#21612).
