* src/xdisp.c (next_element_from_display_vector): Only switch the
iterator from unibyte to multibyte, never in the other direction,
and not if the original character came from a unibyte buffer.
(Bug#79317)
The following changes make the changes for bug#79275 less
radical, closer to their previous shape, while still fixing
that bug.
* src/xdisp.c (push_prefix_prop, get_it_property): Restore
original code that determined the object and position on it.
(get_line_prefix_it_property): Take FROM_BUFFER from the actual
object of the prefix property.
Only allow string mutation that is certain not to require string data to
be resized and reallocated: writing bytes into a unibyte string, and
changing ASCII to ASCII in a multibyte string.
This ensures that mutation will never transform a unibyte string to
multibyte, that the size of a string in bytes never changes, and that
the byte offsets of characters remain the same. Most importantly, it
removes a long-standing obstacle to reform of string representation and
allow for future performance improvements.
* src/data.c (Faset): Disallow resizing string mutation.
* src/fns.c (clear_string_char_byte_cache):
* src/alloc.c (resize_string_data): Remove.
* test/src/data-tests.el (data-aset-string): New test.
* test/lisp/subr-tests.el (subr--subst-char-in-string):
Skip error cases.
* test/src/alloc-tests.el (aset-nbytes-change):
Remove test that is no longer relevant.
* doc/lispref/strings.texi (Modifying Strings):
* doc/lispref/sequences.texi (Array Functions):
* doc/lispref/text.texi (Substitution): Update manual.
* etc/NEWS: Announce.
* src/xdisp.c (push_it): Reset the 'string_from_prefix_prop_p' flag.
(try_window_id): Disable this optimization if the last unchanged
at-beg row begins with a display or overlay string and there;s a
line/wrap-prefix property on the row.
(push_prefix_prop): Accept an additional argument FROM_BUFFER to
indicate that the prefix property was found on buffer text
underlying a display or overlay property, and set up the position
to pop to accordingly. Reset the 'string_from_display_prop_p' flag
of the iterator after pushing IT to set up for iterating the
prefix string.
(get_it_property): Use it->string, not it->object, as indication
that prefix property is on a string.
(get_line_prefix_it_property): Accept an additional argument:
pointer to a flag indicating that the prefix property was found on
buffer text underlying a display or overlay property. Callers
adjusted.
(handle_line_prefix): Use the FROM_BUFFER flag to correctly handle
prefix properties on buffer text at the same position as a display
string. (Bug#79275)
We use the current parsing position instead. The line and column in the
error weren't used (nor very accurate to begin with) and the user can
easily compute them when needed. The line number calculation is kept
just in case but deprecated, for removal in Emacs 32.
* src/json.c (struct json_parser, json_parser_init): Update parser state.
(json_signal_error): New position computation.
(json_skip_whitespace_internal): Remove.
(is_json_whitespace): New.
(json_skip_whitespace, json_skip_whitespace_if_possible)
(json_parse_unicode, json_parse_string, json_parse_number)
(json_parse_value): Simplify and rewrite for efficiency.
(count_chars, count_newlines)
(string_byte_to_pos, string_byte_to_line)
(buffer_byte_to_pos, buffer_byte_to_line): New.
(Fjson_parse_string, Fjson_parse_buffer): Adapt to new parser state.
* test/src/json-tests.el (json-tests--parse-string-error-pos)
(json-tests--parse-buffer-error-pos, json-parse-error-position): New.
* etc/NEWS: Note deprecation of line and column.
end_of_file_error previously always signaled end-of-file with
load-true-file-name if that was non-nil (and a string).
However, this might be the wrong thing to do; for example, if a
file being loaded calls read on a buffer.
* src/lread.c (end_of_file_error): <source>: New argument; check
it to determine what data to signal with. (bug#68546)
(read_char_escape, read_char_literal, read_string_literal)
(skip_space_and_comments, read0): Pass source to
end_of_file_error.
.waiting_thread and .thread could be left set to non-NULL values
in a deleted fd_callback_info entry. These would never be
cleared by e.g. clear_waiting_thread_info since that only clears
fd_callback_info entries up to max_desc. Clear fd_callback_info
entirely when deleting an entry.
* src/process.c (clear_fd_callback_data): Add.
(delete_write_fd, delete_keyboard_wait_descriptor): Call
clear_fd_callback_data. (bug#79201)
(delete_read_fd): Remove duplicated clearing code.
(deactivate_process): Remove duplicate recompute_max_desc.
* lisp/treesit.el (treesit-enabled-modes): New user option.
* src/treesit.c (treesit-major-mode-remap-alist): New variable.
* lisp/progmodes/c-ts-mode.el:
* lisp/progmodes/csharp-mode.el:
* lisp/progmodes/java-ts-mode.el:
* lisp/progmodes/js.el:
* lisp/progmodes/json-ts-mode.el:
* lisp/progmodes/ruby-ts-mode.el:
* lisp/progmodes/sh-script.el:
* lisp/textmodes/css-mode.el:
* lisp/textmodes/mhtml-ts-mode.el:
* lisp/textmodes/toml-ts-mode.el:
Add ts-mode mapping to 'treesit-major-mode-remap-alist'
for ts-modes that already have the corresponding non-ts mode
association in 'auto-mode-alist'.
* lisp/progmodes/cmake-ts-mode.el (cmake-ts-mode-maybe):
* lisp/progmodes/dockerfile-ts-mode.el (dockerfile-ts-mode-maybe):
* lisp/progmodes/elixir-ts-mode.el (elixir-ts-mode-maybe):
* lisp/progmodes/go-ts-mode.el (go-ts-mode-maybe)
(go-mod-ts-mode-maybe, go-work-ts-mode-maybe):
* lisp/progmodes/heex-ts-mode.el (heex-ts-mode-maybe):
* lisp/progmodes/lua-ts-mode.el (lua-ts-mode-maybe):
* lisp/progmodes/php-ts-mode.el (php-ts-mode-maybe):
* lisp/progmodes/rust-ts-mode.el (rust-ts-mode-maybe):
* lisp/progmodes/typescript-ts-mode.el (typescript-ts-mode-maybe)
(tsx-ts-mode-maybe):
* lisp/textmodes/markdown-ts-mode.el (markdown-ts-mode-maybe):
* lisp/textmodes/yaml-ts-mode.el (yaml-ts-mode-maybe):
Add a wrapper function to 'auto-mode-alist'
for ts-modes that have no corresponding non-ts mode.
Also add a mapping to 'treesit-major-mode-remap-alist'
for the case when a non-ts mode is installed from an external
source to be able to customize it with 'treesit-enabled-modes'.
* src/inotify.c (inotify_callback): Set event.frame_or_window to Qnil.
* src/keyboard.c (make_lispy_event): Make a better check for the
HAVE_W32NOTIFY case when creating a Qfile_notify event.
Fixes bug#74074, bug#79164.
* src/nsterm.m ([EmacsView windowDidEndLiveResize:]):
([EmacsView updateFramePosition]): New functions.
([EmacsView windowDidMove:]): Move contents of this function into
updateFramePosition and call it.
Copyright-paperwork-exempt: yes
* src/thread.c (Fmake_thread): Add new argument (bug#76969).
(thread_set_error): New function, extracted from thread-signal.
(Fthread_buffer_disposition): Add getter.
(Fthread_set_buffer_disposition): And setter.
(thread_check_current_buffer): Check the values of threads'
buffer_disposition.
(thread_all_before_buffer_killed): New function.
(init_threads): Set buffer_disposition to nil for the main thread.
(syms_of_threads): Add new symbols and define the error.
* src/thread.h (thread_state): New field buffer_disposition.
(thread_all_before_buffer_killed): Declare.
* src/buffer.c (Fkill_buffer): Call thread_check_current_buffer
one more time after all hooks and after that call
thread_all_before_buffer_killed.
* src/comp.c (ABI_VERSION): Increase the value.
* test/src/thread-tests.el (thread-buffer-disposition-t)
(thread-buffer-disposition-nil)
(thread-buffer-disposition-silently)
(thread-set-buffer-disposition)
(thread-set-buffer-disposition-main-thread): New tests.
* doc/lispref/threads.texi (Basic Thread Functions): Document
buffer-disposition in make-thread and its getter and setter.
* etc/NEWS: Add entry.
* src/print.c (print_create_variable_mapping): Fix a typo,
`unreadeable-function' to `unreadable-function'. Add `symbols-bare'
as an override for `print-symbols-bare'. (Bug#79161)
* src/term.c (syms_of_term): New variable.
* src/cm.c (calccost): Control overshooting with new variable.
* etc/NEWS: Document new variable.
* lisp/term/rxvt.el (terminal-init-rxvt): Force no TAB+BS for
rxvt. (Bug#78474)
* src/eval.c: new primitive debugger-trap
* src/.gdbinit: set breakpoint to Fdebugger_trap
* etc/DEBUG: document it.
Remove suggestion to use Fredraw_display.
This do-nothing primitive gives control to GDB, and for debugging
convenience a breakpoint is set by default in .gdbinit.
* src/xfns.c (x_set_tool_bar_lines, x_change_tool_bar_height)
* src/pgtkfns.c (x_change_tool_bar_height)
(pgtk_set_tool_bar_lines): Set f->tool_bar_resized to true so
inhibiting implied resizing works for frames without initial
tool bar too. See the thread
https://lists.gnu.org/archive/html/emacs-devel/2025-08/msg00034.html.
* src/lisp.h: Include <sys-limits.h>.
(MAX_RW_COUNT): Remove, as it is the same thing as sys-limits.h’s
SYS_BUFSIZE_MAX. All uses replaced by SYS_BUFSIZE_MAX.
Make the accessibility role of Emacs windows to be "standard
window" (AXWindow) instead of "text field" (AXTextField). This matches
other applications on NS, as can be verified with any accessibility
inspector. All widely used NS ports, such as Emacs Plus, have this
patch already applied. As for practical impact, this change makes Emacs,
for example, work with tiling window managers, such as Yabai, where many
users report problems with Emacs specifically, and are instructed to
simply avoid the official NS port of GNU Emacs due to this problem.
* src/nsterm.m: ([EmacsWindow accessibilityAttributeValue:]): Make the
accessibility role of Emacs windows to be "standard window" (AXWindow)
instead of "text field" (AXTextField).
Simplify the code by using the already existing dynamic string buffer
type. This is a refactoring; performance isn't measurably affected.
* src/lread.c (grow_read_buffer): Dissolve into...
(readbuf_grow): ...here, simplifying the code.
(add_char_to_buffer): Check for growth before adding char, not after.
(read_integer, read_string_literal): Use readbuf_t.
These have nothing to do with the Lisp reader at all.
Suggested by Lynn Winebarger (bug#79035).
* src/lread.c (read_filtered_event, Fread_char, Fread_event)
(Fread_char_exclusive, Qascii_character): Move...
* src/keyboard.c: ...here.
* test/src/lread-tests.el (test-inhibit-interaction): Move...
* test/src/keyboard-tests.el (keyboard-inhibit-interaction): ...here.
Prepare for the next Gnulib merge by disabling the optional
support for non-Gregorian calendars recently added to Gnulib’s
nstrftime module. This would be tricky to integrate with Emacs,
as Emacs has its own (much fancier) calendar system, one that at
least for the Persian calendar sometimes disagrees with Gnulib’s,
and it’s likely not worth the trouble of reconciling the conflicts.
* src/conf_post.h (SUPPORT_NON_GREG_CALENDARS_IN_STRFTIME):
New macro, defined to false.
* admin/merge-gnulib (GNULIB_MODULES): nstrftime → nstrftime-limited.
(AVOIDED_MODULES): Add localcharset.
Near the end, also remove the files lib/calendar-ethiopian.h,
lib/calendar-persian.h, lib/calendar-thai.h, lib/calendars.h.
This does not change behavior.
* src/emacs.c (follow_if_symlink): New static function, as a
vehicle for commentary explaining the deal with readlink and realpath.
(find_emacs_executable): Use it.
The new 'borders-respect-alpha-background' frame parameter, when
set to 't', will make window dividers and internal borders
respect the 'alpha-background' frame parameter. This allows
transparent gaps between windows.
* doc/lispref/frames.texi (Font and Color Parameters):
Document the change.
* src/frame.c (frame_parm_table, syms_of_frame)
(gui_set_borders_respect_alpha_background):
* src/frame.h (struct frame): Add frame parameter.
* src/androidfns.c (x_create_frame, android_create_tip_frame)
(android_frame_parm_handlers):
* src/haikufns.c (haiku_create_frame, haiku_create_tip_frame)
(haiku_frame_parm_handlers):
* src/nsfns.m (ns_frame_parm_handlers, x_create_frame):
* src/w32fns.c (x_create_frame, w32_create_tip_frame)
(w32_frame_parm_handlers): Add dummy parameters for backends
that don't support opacity.
* src/pgtkfns.c (pgtk_frame_parm_handlers, x_create_frame)
(pgtk_create_tip_frame):
* src/pgtkterm.c (pgtk_draw_window_divider):
* src/xfns.c (x_create_frame, x_create_tip_frame)
(x_frame_parm_handlers)
* src/xterm.c (x_draw_window_divider)
(x_clear_under_internal_border): Implement parameter on backends
that support opacity.
* src/nsterm.m (ns_draw_fringe_bitmap): Move the call to ns_focus out of
the if for overlay_p and rename the rect from clearRect to bmpRect to
make it's purpose clearer.
* src/nsterm.m (ns_define_fringe_bitmap): Replace the fringe bitmap
"tracing" method to a true tracing method. This should make the
resulting vector simpler and therefore faster to draw.
* src/nsterm.m (selectedRange): Implement to fix dictation.
* etc/NEWS: Announce regression fix.
* etc/PROBLEMS: Help users recover from rejected permission.
* src/callproc.c (init_callproc): Don’t bother testing for the
existence of ../src/ and NEWS if installation-directory is
non-nil, because in that case we will test for ../etc/NEWS anyway.
Simplify by using AUTO_STR.
* src/lisp.h (AUTO_STR, AUTO_STR_WITH_LEN): New macros.
Long ago this sort of thing would have been a no-no
because we needed to GCPRO the strings.
However, GCPRO went away a decade ago.
When PATH is unset or empty, use the system default,
to be consistent with GNU/Linux and with POSIX.
If there is no system default do not default to "."
as that can be dangerous.
* src/callproc.c (init_callproc_1, init_callproc):
Default PATH to the null pointer, not the empty string.
* src/emacs.c (default_PATH): New function.
(find_emacs_executable, decode_env_path): Be consistent with POSIX
and with glibc about what to do when PATH is unset or empty.
* src/emacs.c (find_emacs_executable): If the executable name
contains a slash, use the same optimization for symlink resolution
that we already use when the executable name has no slash.
