Merge branch 'scratch/tty-child-frames'

Add support for child frames on tty

The redisplay part is complete.  The frame-handling part supports
use-cases like Posframe, Corfu, and child frames acting like tooltips.
Other use-cases of child frames are not currently supported.  In
particular, trying to create minibuffer-only child frames on ttys will
signal an error.

* src/xfaces.c (free_frame_faces): Change formatting slightly.

* src/xdisp.c (redisplay_trace, move_tracxe): Print to stderr because
stdout screws up terminal display.
(init_iterator): Remove a #ifdef HAVE_WINDOW_SYSTEM.
(clear_garbaged_frames): Return a bool telling if we cleared matrix.
(echo_area_display): Use combine_updates on tty frames.
(redisplay_internal): Changes for redisplay of tty child windows.
(deep_copy_glyph_row): Take a frame parameter.
(display_tty_menu_item): Changes because of function signature changes.

* src/w32term.c (w32_read_socket): Don't use FRAME_OBSCRURED_P,
which has been removed.

* src/w32inevt.c (do_mouse_event): Workaround for mouse events on
child frafmes.

* src/w32console.c (w32con_write_glyphs, w32con_update_end):
Use glyphs' frame for faces.

* src/treesit.c (treesit_load_language): Pacify a warning.

* src/w32console.c (w32con_clear_end_of_line): Set glyph's frame.

* src/terminal.c (cursor_to, raw_cursor_to): Handle case that
frame is a child frame.

* src/termhooks.h: Declare formerly static functions.

* src/term.c (tty_hide_cursor, tty_show_cursor): Make externally
visible.
(tty_write_glyphs): Determine faces based on a glyph's frame.
(tty_write_glyphs_with_face): Take a struct face argument instead
of a face id.  Callers changed.
(tty_insert_glyphs): Use faces, not face ids.
(append_glyph, append_composite_glyph, append_glyphless_glyph):
Set glyph's frame.
(turn_on_face, turn_off_face): Take face argument instead of face
id.  Callers adapted.
(Fresume_tty): Act on root frame.
(tty_draw_row_with_mouse_face): Handle child frames.
(restore_desired_matrix): Make sure glyphs' is live.
(set_tty_hooks): Set terminal's frame_raise_lower_hook.
(tty_frame_geometry, Ftty_frame_geometry, Ftty_frame_edges)
(Ftty_frame_list_z_order, Ftty_frame_restack)
(tty_display_dimension, Ftty_display_pixel_width)
(Ftty_display_pixel_height): New functions.
(syms_of_term): Defsubr new Lisp functions.

* src/minibuf.c (read_minibuf): Use combine_updates for tty
frames.

* src/frame.h (struct frame): Always define parent_frame.  Change
'visible' to be a boolean.  Always define 'undecorated' and
'no_accept_focus'.  Add 'z_order'.
(FRAME_OBSCURED_P): Removed.
(FRAME_PARENT_FRAME): Make it a function.
(SET_FRAME_VISIBLE): Take a bool parameter, not an int.
(FRAME_INTERNAL_BORDER_WIDTH): Don't special-base HAVE_WINDOW_SYSTEM.

* src/frame.c (decode_tty_frame): New function.
(set_menu_bar_lines): Set menu bar lines and height to 0 for tty
child frames.  Compute min height differently.
(adjust_frame_size): Set FrameCols/Rows only for root tty frames.
Mark tty root frame garbaged if child frame is adjusted.  Run some
code even if not HAVE_WINDOW_SYSTEM.
(make_frame): Run some code even if not HAVE_WINDOW_SYSTEM.
(make_terminal_frame): Implement child frame creation.
(tty_child_pos_param, tty_child_size_param)
(tty_child_frame_rect): New functions.
(Fmake_terminal_frame): Parts rewritten for child frames.
(do_switch_frame): Add child frame support.
(Fframe_ancestor_p): Define if not HAVE_WINDOW_SYSTEM.
(Fmake_frame_visible, Fmake_frame_invisible)
(Fframe_visible_p, Fraise_frame):
Handle tty frames differently.
(store_frame_param): Signal error if trying to re-parent a tty
child frame.
(Fframe_parameters): Report some additional tty frame parameters.
(Fmodify_frame_parameters): Handle tty child frames.
(Fset_frame_position): Ditto.
(frame_parms): Define index for additional frame parameters.
(handle_frame_param): New function.
(gui_set_frame_parameters_1): Use handle_frame_param.

* src/disptab.h (DISP_TABLE_EXTRA_SLOTS): Change to 12.
(enum box): New enumeration.

* src/dispnew.c (check_rows): New function, #if 0.
(frame_matrix_frame): Variable removed.
(line_hash_code): Take glyph's frame into account.
(build_frame_matrix_from_leaf_window): Do not copy glyphs from
rows that aren't enabled.
(fill_up_glyph_row_with_spaces): Add frame parameter, uses
changed.
(fill_up_glyph_row_area_with_spaces): Add frame parameter.  Set
glyph's frame to it.
(fill_up_frame_row_with_spaces): Ditto.
(set_frame_matrix_frame): Function removed.
(make_current): Change signature.  Callers changed.
(mirrored_line_dance): Take a frame argument, not a matrix.
(redraw_frame): Don't clear_frame a child frame.
(struct rect): New.
(rect_intersect, frame_pos_abs, frame_rect_abs, root_frame)
(max_child_z_order, is_frame_ancestor, frames_with_root)
(frames_with_parent, frame_z_order_cmp, Fframe__z_order_lessp)
(frames_in_reverse_z_order, tty_raise_lower_frame, is_tty_frame)
(is_tty_child_frame, is_tty_root_frame, first_enabled_row)
(make_matrix_current, prepare_desired_root_row)
(make_glyph_space, neutralize_wide_char, produce_box_glyphs)
(produce_box_sides, produce_box_line, copy_child_glyphs)
(update_window_frame, update_initial_frame, flush_terminal)
(abs_cursor_pos, is_in_matrix, is_cursor_obscured)
(terminal_cursor_magic, combine_updates_for_frame)
(combine_updates): New functions.
(update_frame): Rewritten.
(Fdisplay__update_for_mouse_movement): Take a MOUSE_FRAME param.
(syms_of_display): New symbol frame--z-order--lessp, tty-non-selected-cursor.
New subr Sframe__z_order_lessp.  Provide tty-child-frames.

* src/dispextern.h (struct glyph): Add member 'frame'.
(CHAR_GLYPH_SPACE_P): Add FRAME parameter.  All uses changed.
(GLYPH_EQUAL_P): Compare glyphs' frame.
(SET_CHAR_GLYPH): Add parameter FRAME.
(SET_CHAR_GLYPH_FROM_GLYPH): Ditto.

* src/chartab.c (Fmake_char_table): Allow more than 10 display
table slots.

* lisp/xt-mouse.el (xterm-mouse--handle-mouse-movement): Use new
terminal parameter xterm-mouse-frame.
(xterm-mouse-position-function): Ditto.
(xterm-mouse-event): Determine frame under mouse and compute
frame-relative coordinates.  Set terminal parameter
xterm-mouse-frame.

* lisp/tty-tip.el: New file implementing tooltip for ttys.

* lisp/paren.el (show-paren-function): Don't check if
display-graphics-p when using child frames.

* lisp/frame.el (frame-at): New function.
(tty-frame-geometry, tty-frame-edges, tty-frame-restack)
(tty-display-pixel-height, tty-frame-list-z-order)
(tty-display-pixel-width): Declare C function.
(frame-geometry): Use tty-frame-geometry.
(frame-edges): Use tty-frame-edges.
(frame-list-z-order): Use tty-frame-list-z-order.
(frame-restack): Use tty-frame-restack.
(display-pixel-height): Use tty-display-pixel-height.
(display-pixel-width): Use tty-display-pixel-width.

* lisp/disp-table.el (display-table): Increase size to 12.
(box-horizontal, box-vertical, box-down-right, box-down-left)
(box-up-right, box-up-left): New display table slot names for
box-drawing characters.
(display-table-slot, set-display-table-slot): Extend doc string.
(describe-display-table): Display new display table slots.
(standard-display-unicode-special-glyphs): New function setting
up Unicode characters for display table entries.

* .gitignore: Don't ignore patch files, they are useful to see in
Magit status buffer when applying patches (git am).

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