* src/xterm.c (x_get_window_below): New function.
(XTmouse_position): If track-mouse is drag-source and a window
is a tooltip, look below it.
(handle_one_xevent): Don't generate a nil help-echo event on
LeaveNotify if the display is grabbed and track-mouse is
drag-source.
* src/emacs.c (main): If invoked with --version, call
'init_bignum' before calling 'format-time-string', as that is
needed for safe manipulation of bignums in timefns.c.
Make the character literal ?\LF (linefeed) generate 10, not -1.
Ensure that Control escape sequences in character literals are
idempotent: ?\C-\C-a and ?\^\^a mean the same thing as ?\C-a and ?\^a,
generating the control character with value 1. "\C-\C-a" no longer
signals an error.
* src/lread.c (read_escape): Make nonrecursive and only combine
the base char with modifiers at the end, creating control chars
if applicable. Remove the `stringp` argument; assume character
literal syntax. Never return -1.
(read_string_literal): Handle string-specific escape semantics here
and simplify.
* test/src/lread-tests.el (lread-misc-2): New test.
* src/xterm.c (x_next_event_from_any_display): Don't call
XPending unless there is input to be read on the connection, and
don't call ConnectionNumber twice.
* doc/lispref/frames.texi (Window System Selections):
* etc/NEWS: Document new changes to `gui-get-selection'.
* lisp/dired.el (dired-mouse-drag): Specify text/uri-list value
explicitly.
* lisp/select.el (gui-set-selection): Update doc string.
(xselect-convert-to-text-uri-list): Update to handle either a
single URL (as a string) or a vector of URLs, instead of file
names.
(xselect-uri-list-available-p): Likewise.
* src/xselect.c (x_get_local_selection): Look in tem's text
properties (if it is a string) for a local value before using
tem itself.
* src/xterm.c (x_check_expected_move): Fix indent.
(x_sync_with_move): Use pselect to wait the 0.5 seconds instead
of wait_reading_process_output if input is blocked.
* src/nsselect.m (Fns_begin_drag): New argument `return-frame'.
(syms_of_nsselect): New defsym.
* src/nsterm.h (EmacsWindow): New fields.
* src/nsterm.m (ns_read_socket): Split parts off to
ns_read_socket_1.
(ns_read_socket_1): New function.
(ns_flush_display): Use that function instead.
([EmacsWindow beginDrag:forPasteboard:]): Update for
return-frame.
* src/nsterm.m (ns_mouse_position): Implement `drag-source'
on NS.
([EmacsView draggingUpdated:]): Add autorelease pool around
callbacks.
([EmacsWindow beginDrag:forPasteboard:]): Block input around
dragImage.
* src/xterm.c (x_get_current_wm_state): When lint checking,
initialize reply_data to a non-null dummy value instead of to a
null one. This pacifies GCC 12 -Wanalyzer-null-dereference.
* src/lisp.h (CHAR_TABLE_REF_ASCII): Refactor as a straightforward
for-loop. Redo an if-then-else to be an (!if)-else-then as this
is a bit cleaner, and it also works around GCC bug 105755.
* src/coding.c (detect_coding): Always initialize all
components of detect_info, so that detect_coding_utf_8 etc.
do not have undefined behavior when they read detect_info.checked.
This bug is not likely to cause problems on real systems.
Problem found by GCC 12 -fanalyzer.
(detect_coding_system): Use consistent style with detect_coding
initialization.
Restructure the reader to be nonrecursive so that it is not limited by
the C stack or crashes Emacs when reading deeply nested data.
This also improves performance.
A few minor bugs were fixed:
- (a .{NBSP}b) where {NBSP} is a non-breaking space (U+00A0) is now
the dotted pair (a . b), not the 3-element list (a \. b), since U+00A0
is treated as whitespace everywhere else.
- #_ with no symbol following is now equivalent to ## (empty interned
symbol), not #: (empty uninterned symbol).
* src/alloc.c (garbage_collect): Call mark_lread.
* src/lread.c (readevalloop): Use read0 instead of read_list.
(stackbufsize): Increase to 1024, now that read0 isn't recursive.
(invalid_radix_integer): Buffer overflow check.
(read1, read_list, read_vector): Remove.
(read_char_literal, read_string_literal)
(hash_table_from_plist, record_from_list, vector_from_rev_list)
(bytecode_from_rev_list, char_table_from_rev_list)
(sub_char_table_from_rev_list, string_props_from_rev_list)
(read_bool_vector, skip_lazy_string, symbol_char_span)
(skip_space_and_comments)
(enum read_entry_type, struct read_stack_entry, struct read_stack)
(rdstack, mark_lread, read_stack_top, read_stack_pop)
(read_stack_empty_p, grow_read_stack, read_stack_push): New.
(read0): Rewrite to be nonrecursive.
* test/src/lread-tests.el (lread-deeply-nested, lread-misc): New tests.
* src/atimer.c (set_alarm): If the atimer has already expired, signal
it right away instead of postponing it further. Previously this could
occur repeatedly, blocking atimers indefinitely.
Also only use `alarm` as fallback if `setitimer` is unavailable, not
both at the same time (which makes no sense, and they both typically
use the same mechanism behind the curtains).
* test/src/eval-tests.el (eval-tests/funcall-with-delayed-message):
New test, verifying proper functioning of funcall-with-delayed-message
which also serves as test for this bug (which also caused
debug-timer-check to fail, but that test is only run when Emacs is
built with enable-checking).
* src/haiku_support.cc (EmacsScreenChangeMonitor): Fix comment.
* src/haikufns.c (haiku_set_z_group): Ask for a position update,
since changing the Z group might change the feel of the window.
* src/xselect.c (wait_for_property_change):
(x_get_foreign_selection): Use `x_wait_for_cell_change' if input
is blocked. (bug#22214)
* src/xterm.c (x_wait_for_cell_change): New function.
* src/xterm.h: Update prototypes.
* lisp/term/ns-win.el (ns-handle-drag-motion): New function.
* src/nsterm.m ([EmacsView draggingUpdated:]): Call that
function instead.
(syms_of_nsterm): Clean up old style defvars and add new
defvar for the DND drag function.
* src/xfns.c (Fx_begin_drag): Alloca target list.
* src/xterm.c (x_set_dnd_targets): Copy the given targets list.
(x_dnd_begin_drag_and_drop): Record freeing the targets list on
the specpdl.
(handle_one_xevent, x_dnd_cleanup_drag_and_drop)
(x_connection_closed, x_delete_terminal): Stop calling
`x_set_dnd_targets' manually to free the targets list.
