* doc/lispref/frames.texi (Drag and Drop): Document new
parameter `return-frame' to `x-begin-drag'.
* lisp/mouse.el (mouse-drag-and-drop-region): Utilize new
feature.
* src/xfns.c (Fx_begin_drag): New parameter `return-frame'.
* src/xterm.c (x_dnd_begin_drag_and_drop): New parameter
return_frame_p.
(handle_one_xevent): Set new flags and return frame whenever
appropriate.
* src/xterm.h: Update prototypes.
This still probably needs some more protection from
malfunctioning clients which delete windows at random, but I
don't know if that's a problem in practice.
* doc/emacs/frames.texi (Drag and Drop):
* doc/lispref/frames.texi (Drag and Drop): Document new
features.
* etc/NEWS: Announce new function `x-begin-drag' and new user
option `mouse-drag-and-drop-region-cross-program'.
* lisp/mouse.el (mouse-drag-and-drop-region-cross-program): New
user option.
(x-begin-drag): New variable declaration.
(mouse-drag-and-drop-region): If the mouse moves out of an Emacs
frame, begin a window system drag.
* lisp/x-dnd.el (x-dnd-handle-xdnd): Remove left-over debugging
code.
* src/xfns.c (Fx_set_mouse_absolute_pixel_position): Fix
indentation of opening paren.
(Fx_begin_drag): New function.
(syms_of_xfns): Define new subr.
* src/xselect.c (x_timestamp_for_selection): New function.
* src/xterm.c (X_DND_SUPPORTED_VERSION): New preprocessor
declaration.
(x_dnd_get_window_proto, x_dnd_send_enter, x_dnd_send_position)
(x_dnd_send_leave, x_dnd_send_drop, x_set_dnd_targets)
(x_dnd_begin_drag_and_drop): New functions.
(handle_one_xevent): Handle drag-and-drop motion and button
events when active.
(x_free_frame_resources): If f is the DND source, stop
drag-and-drop.
(x_term_init): Intern new atoms.
(syms_of_xterm): New symbol QXdndSelection.
* src/xterm.h (struct x_display_info): New atoms
Xatom_XdndAware, Xatom_XdndSelection, Xatom_XdndTypeList,
Xatom_XdndActionCopy, Xatom_XdndActionMove,
Xatom_XdndActionLink, Xatom_XdndActionAsk,
Xatom_XdndActionPrivate, Xatom_XdndActionList,
Xatom_XdndActionDescription, Xatom_XdndProxy, Xatom_XdndEnter,
Xatom_XdndPosition, Xatom_XdndStatus, Xatom_XdndLeave,
Xatom_XdndDrop, and Xatom_XdndFinished.
* src/bytecode.c (Fbyte_code):
* src/composite.c (Fclear_composition_cache):
Prefer CALLN to doing it by hand.
* src/fns.c (ccall2): Remove. All uses replaced by CALLN.
* src/haiku_io.c (haiku_read_with_timeout): Accept `bigtime_t'
instead of `time_t' for values which are cast to bigtime_t
anyway.
* src/haiku_support.cc (BMenu_run): Read all help events instead
of just one.
* src/haiku_support.h: Update prototypes.
* src/haiku_support.cc (class EmacsScrollBar): New field
`maybe_overscroll'.
(MouseDown): Set that field.
(MouseUp): Clear that field.
(MouseMoved): Also test `maybe_overscroll' to ensure that a grab
started inside the scroll bar.
Use a dedicated stack for bytecode, instead of using the C stack.
Stack frames are managed explicitly and we stay in the same
exec_byte_code activation throughout bytecode function calls and
returns. In other words, exec_byte_code no longer uses recursion
for calling bytecode functions.
This results in better performance, and bytecode recursion is no
longer limited by the size of the C stack. The bytecode stack is
currently of fixed size but overflow is handled gracefully by
signalling a Lisp error instead of the hard crash that we get now.
In addition, GC marking of the stack is now faster and more precise.
Full precision could be attained if desired.
* src/alloc.c (ATTRIBUTE_NO_SANITIZE_ADDRESS): Make non-static.
* src/bytecode.c (enum stack_frame_index, BC_STACK_SIZE)
(sf_get_ptr, sf_set_ptr, sf_get_lisp_ptr, sf_set_lisp_ptr)
(sf_get_saved_pc, sf_set_saved_pc, init_bc_thread, free_bc_thread)
(mark_bytecode, Finternal_stack_stats, valid_sp): New.
(exec_byte_code): Adapt to use the new bytecode stack.
(syms_of_bytecode): Add defsubr.
* src/eval.c (unwind_to_catch): Restore saved stack frame.
(push_handler_nosignal): Save stack frame.
* src/lisp.h (struct handler): Add act_rec member.
(get_act_rec, set_act_rec): New.
* src/thread.c (mark_one_thread): Call mark_bytecode.
(finalize_one_thread): Free bytecode thread state.
(Fmake_thread, init_threads): Set up bytecode thread state.
* src/thread.h (struct bc_thread_state): New.
(struct thread_state): Add bytecode thread state.
Pass the function object and encoded arity, not the other components.
This speeds up several call paths and is necessary for improvements to
come.
* src/bytecode.c (Fbyte_code): Make a new byte code object for
execution. This is slower but performance isn't critical here.
(exec_byte_code): Retrieve components from the passed function.
* src/eval.c (fetch_and_exec_byte_code):
* src/lisp.h (exec_byte_code): Update signature.
* src/haiku_support.cc (class EmacsScrollBar): New field
`real_max_value'.
(MessageReceived): Set real max value.
(MouseMoved): Get rid of magic numbers by using real max value
instead.
* src/haiku_support.cc (class EmacsScrollBar): New fields
`in_overscroll', `can_overscroll', `last_overscroll',
`last_reported_overscroll_value' and `max_value'.
(ValueChanged): Make very sure extraneous value are not
generated.
(MouseUp): Clear overscroll if enabled.
(MouseMoved): If overscroll is enabled and dragging downwards
fails to dislodge the maximum value, enable overscrolling.
(BView_scroll_bar_update): New parameter `can_overscroll'
* src/haiku_support.h: Update prototypes.
* src/haikuterm.c (haiku_set_scroll_bar_thumb)
(haiku_set_horizontal_scroll_bar_thumb): Adjust parameters to
scroll bar update functions.
(haiku_read_socket): Take ceiling of bar position if
horizontal.
Don't use `openp`s functionality to remap `.elc` files to `.eln` files
since `locate-file` is not specific to ELisp files.
This should be not just simpler but more robust than the current
hack which tries to undo the damage after the fact.
* src/lread.c (Flocate_file_internal): Don't map `.elc` to `.eln`.
* lisp/files.el (locate-file): Simplify accordingly.
* src/gtkutil.c (xg_scroll_bar_size_allocate_cb): New function.
(xg_finish_scroll_bar_creation): Attach new signal.
(xg_update_scrollbar_pos)
(xg_update_horizontal_scrollbar_pos): Also set window dimensions
for the event box.
* src/xterm.c (x_scroll_bar_configure): New function.
* src/xterm.h: Update prototypes.
* src/bytecode.c (BYTE_CODES, enum byte_code_op, exec_byte_code):
Don't display custom messages in debug mode for Bscan_buffer and
Bset_mark which were removed long ago.
* src/bytecode.c (FETCH2):
Use `|` instead of `+` to combine the bytes forming a 16-bit immediate
argument so that GCC (prior to version 12) recognises the idiom and
generates a 16-bit load. This applies for little-endian machines with
cheap unaligned accesses such as x86[-64], arm64 and power64le.
This 1-character change results in a measurable speed gain on many
kinds of Lisp code, as 16-bit immediates are used by all jump
instructions.
Clang performs this optimisation for both `+` and `|` from version 10.
Keep track of the end of specpdl explicitly since that is what we are
comparing against on critical code paths.
* src/eval.c (init_eval_once_for_pdumper, signal_or_quit)
(grow_specpdl_allocation):
* src/fileio.c (Fdo_auto_save):
* src/lisp.h (grow_specpdl):
* src/thread.c (run_thread, Fmake_thread):
* src/thread.h (struct thread_state):
Replace specpdl_size with specpdl_end, according to the equation
specpdl_end = specpdl + specpdl_size.
It's critical in several function call paths.
* src/eval.c (grow_specpdl_allocation): Make non-static.
(grow_specpdl, record_in_backtrace): Move from here...
* src/lisp.h (grow_specpdl, record_in_backtrace): ... to here,
and declare inline.
* src/gtkutil.c (xg_get_widget_from_map): New argument DISPLAY.
All callers changed.
(find_scrollbar_cb): New function.
(xg_finish_scroll_bar_creation, xg_remove_scroll_bar)
(xg_update_scrollbar_pos, xg_update_horizontal_scrollbar_pos)
(xg_set_toolkit_scroll_bar_thumb)
(xg_set_toolkit_horizontal_scroll_bar_thumb, xg_initialize):
Stop using id_to_widget_map on X builds with GTK 3 and set the
event box as the x_window instead.
* src/xterm.c (x_window_to_scroll_bar): Don't look for ID on GTK
3.
(handle_one_xevent): If a ConfigureNotify event is found for a
scroll bar and the dimensions are wrong, resize the X window to
the right ones.
* src/haiku_support.cc (MessageReceived): Use floats for
calculating portion and subtract proportion directly.
* src/haikuterm.c (haiku_set_scroll_bar_thumb): Take ceiling of
value instead of rounding it.
