* 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.
* lisp/term/haiku-win.el (haiku-dnd-wheel-count): New defvar.
(haiku-note-wheel-click, haiku-handle-drag-wheel): New
functions.
* src/haiku_support.cc (EmacsWindow): Get rid of window ID
logic.
(MessageReceived, MouseMoved, be_drag_message): Use thread ID to
identify windows instead of window ID.
* src/haikuselect.c (Fhaiku_drag_message): Record whether or not
the DND frame is a valid drop target.
(haiku_note_drag_wheel): New function.
(syms_of_haikuselect): New defvar.
* src/haikuterm.c (haiku_read_socket): Call
`haiku_note_drag_wheel' when appropriate.
* src/haikuterm.h: Update prototypes.
* 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.
This is provided by the XDND protocol, so it isn't fair for it
to not work with local drag-and-drop.
* lisp/x-dnd.el (x-dnd-note-wheel-movement): New function. Set
it as the `x-dnd-wheel-function'.
* src/xterm.c (x_dnd_cleanup_drag_and_drop): Clear new flags.
(x_dnd_note_self_wheel): New function. Set some flags.
(x_dnd_process_quit, x_dnd_begin_drag_and_drop, handle_one_xevent)
(x_connection_closed, x_delete_terminal, mark_xterm): Handle and
set new wheel movement flags
(syms_of_xterm): New variable `x-dnd-wheel-function'.
* 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/w32proc.c (reader_thread): Wait for 'sys_close' to finish
processing the pipe read descriptor, before trying to close it.
* src/w32.c (sys_close): Attempt to detect when the reader thread
already exited, so that it would be possible to close descriptors
open by pipe processes for reading from the pipe. (Bug#56606)
* src/xdisp.c (redisplay_tab_bar): Compute the desired height of
the tab-bar before iterating over the tab-bar string, to detect
the required resizing earlier. Default 'change_p' to 'false'.
* lisp/tab-bar.el (tab-bar--update-tab-bar-lines): Support
'auto-resize-tab-bars' set to 'grow-only'.
* 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/xterm.c (x_dnd_send_position): Record event X and Y for
consumption by the XdndStatus handler. Ignore mouse rects if
waiting for status.
(x_dnd_send_leave): Clear pending DND event.
(handle_one_xevent): When handling XdndStatus, check if the
pending event is contained in the new mouse rect.
* lisp/cus-start.el (standard): Update defcustom type.
* src/xselect.c (x_should_preserve_selection): New function.
(x_clear_frame_selections): Use it to determine whether or not
to preserve a selection.
* src/xterm.c (x_preserve_selections): Fix tail initialization.
(syms_of_xterm): Update doc string of
`x-auto-preserve-selections'.
* lisp/x-dnd.el (x-dnd-get-drop-width-height): Handle window
width and height correctly. Remove unused parameter.
(x-dnd-after-move-frame): New function.
(move-frame-functions): Add new hook.
(x-dnd-compute-root-window-position): New function.
(x-dnd-get-drop-x-y): Use that instead of `left' and `top'
parameters, which include the title bar.
(x-dnd-handle-xdnd): Update accordingly.
* src/xfns.c (Fx_translate_coordinates): New function.
(syms_of_xfns): New defsym.
* lisp/image.el (image-animate-timeout): Eject cached animated
images that are no longer reachable (bug#56546).
* src/image.c (Fclear_image_cache): Allow specifying a cached
animated image to eject.
(gif_load, webp_load): Adjust what to use as the caching key --
the identity of the list itself is apparently changed by some
callers.
