GitLab

* src/frame.c (next_frame, prev_frame):
Remove now-redundant assertions.
* src/frame.h (FOR_EACH_FRAME): Assume Vframe_list is nonempty.

Add new frame parameters `undecorated', `override-redirect',
`parent-frame', `skip-taskbar', `no-focus-on-map',
`no-accept-focus', `z-group', `delete-before', `no-other-frame',
`mouse-wheel-frame', `min-width', `min-height'.  Add new
functions `frame-restack' and `frame-list-z-order'.

* lisp/cus-start.el (focus-follows-mouse): Adapt customization
type.
* lisp/frame.el (handle-delete-frame): Handle child and
`delete-before' frames.
(other-frame): Stop looking for other frame after one round.
(frame-list-z-order, frame-restack): New functions.
(delete-other-frames): Handle child frames.
* lisp/frameset.el (frameset-persistent-filter-alist)
(frameset--record-relationships): Handle `delete-before',
`parent-frame' and `mouse-wheel-frame' parameters.  Rename
latter from `frameset--record-minibuffer-relationships'.
(frameset--restore-frame): Handle ‘parent-frame’ parameter
specially.
(frameset-restore): Handle `delete-before', `parent-frame' and
`mouse-wheel-frame' parameters.
* lisp/mwheel.el (mwheel-scroll): Handle `mouse-wheel-frame'
parameter.
* lisp/window.el (window--min-size-ignore-p): Fix doc-string.
(mouse-autoselect-window-select, handle-select-window): Major
rewrite.  Try to not ignore errors.  Handle auto-selection of
child frames and different values of `focus-follows-mouse'.
* src/frame.c (frame_windows_min_size): Handle new `min-width'
and `min-height' frame parameters.
(make_frame): Initialize new frame structure members.
(do_switch_frame): Don't reset internal_last_event_frame for
descendant frames.
(Fframe_parent, frame_ancestor_p, Fframe_ancestor_p): New
functions.
(candidate_frame): Don't return `no-other-frame' frame.
(other_frames): New function replacing other_visible_frames.
(delete_frame): Rewrite.  Handle child and `delete-before' frames.
(Fmake_frame_invisible): Call other_frames.
(store_frame_param): Check `delete-before' and `parent-frame'
parameters for circular dependencies.
(frame_parms, syms_of_frame): Add entries for and define new
frame parameters.
(focus_follows_mouse): New meaningful value `auto-raise'.
* src/frame.h (z_group): New enumeration type.
(frame): New slots parent_frame, undecorated, override_redirect,
skip_taskbar, no_focus_on_map, no_accept_focus, z_group.
(fset_parent_frame): New inlined function.
(FRAME_UNDECORATED, FRAME_OVERRIDE_REDIRECT)
(FRAME_PARENT_FRAME, FRAME_SKIP_TASKBAR, FRAME_NO_FOCUS_ON_MAP)
(FRAME_NO_ACCEPT_FOCUS, FRAME_Z_GROUP, FRAME_Z_GROUP_NONE)
(FRAME_Z_GROUP_ABOVE, FRAME_Z_GROUP_ABOVE_SUSPENDED)
(FRAME_Z_GROUP_BELOW): New macros.
(frame_ancestor_p): Add declaration.
* src/gtkutil.c (xg_create_frame_widgets): Handle
`undecorated' and `override-redirect' frame parameters.
(x_wm_set_size_hint): None for child frames.
(xg_set_undecorated, xg_frame_restack, xg_set_skip_taskbar)
(xg_set_no_focus_on_map, xg_set_no_accept_focus)
(xg_set_override_redirect): New functions.
(xg_update_scrollbar_pos, xg_update_horizontal_scrollbar_pos):
Don't let scrollbars obscure child frames.
* src/gtkutil.h: (xg_set_undecorated, xg_frame_restack)
(xg_set_skip_taskbar, xg_set_no_focus_on_map)
(xg_set_no_accept_focus, xg_set_override_redirect): Add extern
declarations.
* src/nsfns.m (ns_frame_parm_handlers): Add entries for new
frame parameters.
(Fx_create_frame): Install `min-width' and `min-height' frame
parameters.
* src/nsterm.m (mouseMoved:): Handle focus_follows_mouse change.
* src/w32fns.c (WS_EX_NOACTIVATE): Define if necessary.
(x_real_positions): Handle child frames.
(x_set_menu_bar_lines): Don't for child frames.
(x_set_undecorated, x_set_parent_frame, x_set_skip_taskbar)
(x_set_no_focus_on_map, x_set_no_accept_focus)
(x_set_z_group): New functions.
(w32_createvscrollbar, w32_createhscrollbar): Don't draw
scroll bars over child frames.
(w32_createwindow): Handle new frame parameters and child frames.
(w32_wnd_proc): Let mouse clicks into a child frame activate
the frame.  Try to handle the `no-accept-focus' parameter.  Do
SetFocus when our window is brought to top or becomes the
foreground window.
(w32_window): Don't initialize menu bar for child frames.
(Fx_create_frame): Handle new frame parameters.
(x_create_tip_frame): Set explicit_parent slot.
(w32_dialog_in_progress): New function.
(Fx_file_dialog): Handle `z-group-above' frames.
(w32_frame_list_z_order, Fw32_frame_list_z_order)
(w32_frame_restack, Fw32_frame_restack): New functions.
(w32_frame_parm_handlers): Add entries for new frame
parameters.
* src/w32font.c (Fx_select_font): Handle `z-group-above'
frames during font selection dialogue.
* src/w32term.c (construct_mouse_wheel): Construct mouse wheel
event from F's w32 window.
(w32_mouse_position): Handle child frames.
(w32_set_vertical_scroll_bar, w32_set_horizontal_scroll_bar):
Don't draw scroll bars over child frames.
(w32_read_socket): Always erase background of child frames.
When generating SELECT_WINDOW_EVENTs handle new value of
`focus-follows-mouse' and handle `no-accept-focus' parameter.
Handle `mouse-wheel-frame' parameter.
(x_calc_absolute_position, x_set_offset, x_set_window_size):
Handle child frames.
(x_make_frame_visible): Handle child frames specially.  Handle
`no-focus-on-map' parameter.
* src/w32term.h (w32_dialog_in_progress): Add external
declaration.
* src/xdisp.c (x_consider_frame_title, prepare_menu_bars): Not
for child frames.
* src/xfns.c (Xm/MwmUtil.h): Include for WM hints.
(PropMotifWmHints, PROP_MOTIF_WM_HINTS_ELEMENTS): Define for
non-Motif, non-GTK case.
(x_real_pos_and_offsets): Handle child frames.
(x_set_undecorated, x_set_parent_frame)
(x_set_no_focus_on_map, x_set_no_accept_focus)
(x_set_override_redirect): New functions.
(x_set_menu_bar_lines): Not for child frames.
(x_window): Handle `undecorated' and `override_redirect' cases.
(Fx_create_frame): Handle new frame parameters.
(frame_geometry): Handle child frames and outer border.
(x_frame_list_z_order, Fx_frame_list_z_order)
(x_frame_restack, Fx_frame_restack): New functions.
(Fx_file_dialog, Fx_select_font): Set x_menu_set_in_use.
(x_frame_parm_handlers): Add entries for new frame parameters.
* src/xmenu.c (x_menu_set_in_use): Handle `z-group-above'
frames.
* src/xterm.c (x_set_frame_alpha): Don't set alpha of parent
for child frames.
(XTmouse_position): Handle child frames.
(x_scroll_bar_create, x_scroll_bar_expose): Don't let scroll
bars obscure child frames.
(handle_one_xevent): Handle child frame positions.  If necessary
set `skip-taskbar' and reassign proper `z-group' when we are
mapped.  When generating SELECT_WINDOW_EVENTs handle new value
of `focus-follows-mouse'.  Handle `mouse-wheel-frame' parameter.
Let mouse clicks into a child frame activate the frame.
(x_calc_absolute_position, x_set_offset): Handle child frames
specially.
(x_set_skip_taskbar, x_set_z_group): New functions.
(x_make_frame_visible): Handle child frames.
(ATOM_REFS_INIT): Add entries for
Xatom_net_wm_state_skip_taskbar, Xatom_net_wm_state_above,
Xatom_net_wm_state_below.
* src/xterm.h (top-level): Declare Xatom_net_wm_state_above,
Xatom_net_wm_state_below and Xatom_net_wm_state_skip_taskbar.
(x_set_skip_taskbar, x_set_z_group): Add extern declarations.

New hook `move-frame-functions'.  Run `focus-in-hook'
after switching to frame that gets focus.  Don't run
XMoveWindow for GTK.

* lisp/frame.el (handle-move-frame, frame-size-changed-p): New
functions.

* src/frame.c (do_switch_frame): Simplify code.
(Fhandle_switch_frame): Switch frame before running
`handle-focus-in'.
(Vfocus_in_hook, Vfocus_out_hook): Clarify doc-strings.
(Vmove_frame_functions): New hook variable.
* src/keyboard.c (kbd_buffer_get_event): Handle
MOVE_FRAME_EVENT.  Handle SELECT_WINDOW_EVENT separately.
(head_table): Add Qmove_frame entry.
(syms_of_keyboard): Add Qmove_frame.
(keys_of_keyboard): Define key for `move-frame'.
* src/termhooks.h (event_kind): Add MOVE_FRAME_EVENT.
* src/w32term.c (w32_read_socket): Create MOVE_FRAME_EVENT.
* src/window.c (run_window_size_change_functions): Record size of
FRAME's minibuffer window too.
* src/xterm.c (handle_one_xevent): Create MOVE_FRAME_EVENT.
(x_set_offset): For GTK call gtk_widget_move instead of
XMoveWindow.

* src/data.c (Frecordp): Rename from Frecordp_p, for consistency.
* src/data.c (syms_of_data):
* src/frame.c (syms_of_frame): Put all the primitive type names
together, under the "Types that type-of returns" comment.

Typo introduced 2013-04-01, "Prefer < to >
in range checks such as 0 <= i && i < N".

* src/frame.c (x_set_alpha): Use ‘ialpha’, not ‘alpha’.

Typo introduced 2013-04-01, "Prefer < to >
in range checks such as 0 <= i && i < N".

* src/frame.c (x_set_alpha): Use ‘ialpha’, not ‘alpha’.

Turn instances of extract_float into XFLOAT_DATA when possible,
and to a resurrected XFLOATINT when the arg is a number.
The resurrected XFLOATINT is more like XFLOAT and XINT in
that is valid only if its arg is a number.  This clarifies
the ways in which floats can be extracted at the C level.
* src/editfns.c (styled_format):
* src/floatfns.c (extract_float, Fexpt):
Use XFLOATINT rather than open-coding it.
* src/fns.c (internal_equal):
* src/image.c (imagemagick_load_image):
* src/xdisp.c (resize_mini_window):
Prefer XFLOAT_DATA to extract_float on values known to be floats.
* src/frame.c (x_set_screen_gamma):
* src/frame.h (NUMVAL):
* src/image.c (x_edge_detection, compute_image_size):
* src/lread.c (read_filtered_event):
* src/window.c (Fset_window_vscroll):
* src/xdisp.c (handle_single_display_spec, try_scrolling)
(redisplay_window, calc_pixel_width_or_height, x_produce_glyphs)
(on_hot_spot_p):
Prefer XFLOATINT to extract_float on values known to be numbers.
* src/lisp.h (XFLOATINT): Bring back this function, except
it now assumes its argument is a number.

* src/lisp.h (XFLOATINT): Remove this alias for extract_float.
All callers changed to use extract_float.
* src/frame.h (NUMVAL): Now an inline function, not a macro.

* src/frame.c (Ficonify_frame): No need to redisplay everything.

* src/xdisp.c (overlay_arrows_changed_p): Add `set_redisplay' argument.
(redisplay_internal): Use it to avoid redisplaying everything.
(try_window_id): Use it keep the same behavior as before.

* src/eval.c (FletX): Report an error for invalid constructs like
‘(let* (a . 0))’, so that ‘let*’ is more consistent with ‘let’.
(lambda_arity): Use plain CHECK_CONS.
* src/fns.c (CHECK_LIST_END): Move from here to lisp.h.
(Fcopy_alist): Remove unnecessary CHECK_LIST call, since
concat does that for us.
(Fnthcdr, Fmember, Fmemql, Fdelete, Fnreverse):
Use CHECK_LIST_END, not CHECK_LIST_CONS.  This hoists a
runtime check out of the loop.
(Fmemq): Simplify and use CHECK_LIST_END instead of CHECK_LIST.
(Fassq, Fassoc, Frassq, Frassoc):
Simplify and use CHECK_LIST_END instead of CAR.
(assq_no_quit, assoc_no_quit): Simplify and assume proper list.
(Fnconc): Use plain CHECK_CONS, and do-while instead of while loop.
* src/fontset.c (Fnew_fontset):
* src/frame.c (Fmodify_frame_parameters):
Use CHECK_LIST_END at end, rather than CHECK_LIST at start, for a
more-complete check.
* src/gfilenotify.c (Fgfile_add_watch):
Omit unnecessary CHECK_LIST, since Fmember does that for us.
* src/lisp.h (lisp_h_CHECK_LIST_CONS, CHECK_LIST_CONS):
Remove; no longer used.
(CHECK_LIST_END): New inline function.

Run admin/update-copyright.

* src/charset.c (load_charset_map):
* src/coding.c (decode_coding_object):
* src/frame.c (make_frame):
* src/window.c (Frecenter):
Mark locals with UNINIT to silence false alarms from
-Wmaybe-uninitialized.
* src/lisp.h (SYMBOL_ALIAS, SYMBOL_BLV, SYMBOL_FWD)
(SET_SYMBOL_ALIAS, SET_SYMBOL_BLV, SET_SYMBOL_FWD):
Check and assume that values are nonnull.  This pacifies
-Wmaybe-uninitialized in Fmake_variable_buffer_local and
Fmake_local_variable.

* src/lisp.h (struct Lisp_Buffer_Local_Value): Remove `frame_local'.

* src/data.c (swap_in_symval_forwarding, set_internal)
(set_symbol_trapped_write, make_blv, Fmake_variable_buffer_local)
(Fmake_local_variable, Fkill_local_variable, Flocal_variable_p):
Don't pay attention to ->frame_local any more.
(syms_of_data): Remove Qtrapping_frame_local and don't defsubr
Smake_variable_frame_local.

* etc/NEWS (Incompatible Lisp Changes in Emacs 26.1): Announce removal
of make-variable-frame-local.

* lisp/help-fns.el (describe-variable): Don't handle the now impossible
frame-local case.

* lisp/subr.el (make-variable-frame-local): Remove obsolescence data.

* src/frame.c (store_frame_param):
* src/eval.c (specbind): Don't pay attention to ->frame_local any more.

* src/widget.c (first_frame_p): Remove, unused.

Apple changed the spelling of its operating system again, to "macOS",
effective with macOS 10.12 Sierra (2016-09-20).  Change Emacs
documentation and comments to match this.  Stick with older OS
spellings ("OS X", "Mac OS X") when talking about older releases where
the older names are more correct.

* src/dispextern.h (struct glyph_string): Remove window member
(block_buffer_flips, unblock_buffer_flips)
(buffer_flipping_blocked_p): Declare.

* src/xterm.h (struct x_display_info): New member supports_xdbe.
(struct x_output): New members draw_desc and need_buffer_flip.
(FRAME_X_DRAWABLE, FRAME_X_RAW_DRAWABLE)
(FRAME_X_DOUBLE_BUFFERED_P)
(FRAME_X_NEED_BUFFER_FLIP): New macros.
(set_up_x_back_buffer, tear_down_x_back_buffer)
(initial_set_up_x_back_buffer): Declare.

* src/xterm.c: Include Xdbe.h.
(x_begin_cr_clip, x_fill_rectangle, x_draw_rectangle)
(x_draw_vertical_window_border, x_update_end)
(x_setup_relief_color, x_draw_relief_rect)
(x_draw_fringe_bitmap, x_shift_glyphs_for_insert)
(x_scroll_run, x_draw_hollow_cursor, x_draw_bar_cursor): Use
FRAME_X_DRAWABLE instead of FRAME_X_WINDOW; rename local
variables appropriately; substitute calls to XClearArea with
x_clear_area, which DTRT for double buffering.
(x_clear_window, x_clear_area): In double-buffering mode, use
rect-drawing X functions instead of XClearWindow and
XClearArea, which always operate on the front buffer.
(show_back_buffer): New function.
(XTframe_up_to_date): Call show_back_buffer when done.
(x_clear_frame, x_clear_frame_area): Remove obsolete calls to
gtk_widget_queue_draw to refresh scroll bars; scroll bars are
now independent X windows.
(handle_one_xevent): Call font_drop_xrender_surfaces when
XftDraw might need regenerating; perform buffer flip when
responding to Expose events; issue front-buffer clearing
commands as stopgap while we wait for redisplay.
Call flush_dirty_back_buffers.
(x_make_frame_visible): Un-bitrot comment; move XSETFRAME
earlier in function.
(x_free_frame_resources): Call tear_down_x_back_buffer when
destroying frame.
(x_term_init): Attempt to initialize double buffer extension.
(x_flip_and_flush): New function.
(x_redisplay_interface): Point to x_flip_and_flush instead of
x_flip directly.
(flush_dirty_back_buffers): New function.
(x_create_terminal): Register buffer_flipping_unblocked_hook.

* src/xftfont.c (xftfont_drop_xrender_surfaces): Use
FRAME_X_DRAWABLE instead of FRAME_X_WINDOW.
(xftfont_draw): Call x_mark_frame_dirty.
(xftfont_drop_xrender_surfaces): New function.
(syms_of_xftfont): Register it.

* src/xfont.c (xfont_draw): Use FRAME_X_DRAWABLE instead of
FRAME_X_WINDOW.

* src/xfns.c: Include Xdbe.h.
(x_set_inhibit_double_buffering, set_up_x_back_buffer)
(Fx_double_buffered_p): New functions.
(x_window): Call initial_set_up_x_back_buffer.
(x_make_gc): Use FRAME_X_DRAWABLE instead of FRAME_X_WINDOW.
(Fx_create_frame): Configure `inhibit-double-buffering'
frame parameter.
(x_create_tip_frame): Call initial_set_up_x_back_buffer.
(x_frame_parm_handlers): Register
x_set_inhibit_double_buffering.
(syms_of_xfns): Register Sx_double_buffered_p.
(x_mark_frame_dirty): Define.

* src/xfaces.c (x_create_gc): Use FRAME_X_DRAWABLE instead of
FRAME_X_WINDOW.

* src/xdisp.c (remember_mouse_glyph, init_glyph_string): Use
FRAME_X_DRAWABLE instead of FRAME_X_WINDOW.
(redisplay_internal): Restart redisplay if a frame is garbaged
during updating; explain why. Block buffer flips
during redisplay.
(redisplay_preserve_echo_area): Block buffer flip during call
to redisplay_internal.
(buffer_flip_blocked_depth): New variable.
(block_buffer_flips, unblock_buffer_flips)
(buffer_flipping_blocked_p): New functions.
(init_glyph_string): Stop setting window member of struct
glyph_string.

* src/w32fns.c (w32_frame_parm_handlers): Add placeholder for
x_set_inhibit_double_buffering.

* src/termhooks.h (struct terminal): Add
buffer_flipping_unblocked_hook.

* src/nsfns.m (ns_frame_parm_handlers): Add placeholder for
x_set_inhibit_double_buffering.

* src/image.c (x_create_bitmap_from_data)
(x_create_bitmap_from_file, x_create_x_image_and_pixmap)
(Create_Pixmap_From_Bitmap_Data)
(x_create_bitmap_from_xpm_data, xpm_load, gs_load): Use
FRAME_X_DRAWABLE instead of FRAME_X_WINDOW; rename local
variables appropriately.

* src/gtkutil.c: Include Xdbe.h.
(xg_get_widget_from_map): Forward declare.
(xg_clear_under_internal_border): Remove obsolete calls to
refresh scroll bars.
(xg_create_frame_widgets): Call initial_set_up_x_back_buffer.
(xg_free_frame_widgets): Call tear_down_x_back_buffer; reset
FRAME_X_DRAWABLE as well as FRAME_X_WINDOW and for the
same reason.
(xg_set_background_color): Set scroll bar background colors.
(xg_finish_scroll_bar_creation): New function with common
logic of xg_create_scroll_bar, xg_create_horizontal_scroll_bar. Force
scroll bars to be real X11 windows.
(xg_create_scroll_bar, xg_create_horizontal_scroll_bar): Call
xg_finish_scroll_bar_creation.
(xg_update_scrollbar_pos, xg_update_horizontal_scrollbar_pos):
Remove obsolete calls to refresh scroll bars; fix comments.

* src/ftxfont.c (ftxfont_get_gcs, ftxfont_draw_bitmap,
(ftxfont_draw_background): Use FRAME_X_DRAWABLE instead of
FRAME_X_WINDOW.

* src/frame.c (frame_parms): Add table entry for new
`inhibit-double-buffering' frame parameter
(syms_of_frame): Register Qinhibit_double_buffering.

* src/font.h (struct font_driver): Add new `flush_frame_caches' hook.
(font_drop_xrender_surfaces): Declare.

* src/font.c (font_drop_xrender_surfaces): New function.

* src/Makefile.in (XDBE_LIBS, XDBE_CFLAGS): Substitute.

* etc/NEWS: Mention use of double buffering

* doc/lispref/frames.texi (Management Parameters): Document
`inhibit-double-buffering' frame parameters.
(Visibility of Frames): Document `x-double-buffered-p'.

* configure.ac: Check for the X double buffer extension

* src/frame.c (Fmake_terminal_frame): Don't complain when the
caller asks for a deviant minibuffer setting (Bug#24758).

* src/frame.c (do_switch_frame): Redirect frame focus also when
the frame switched to has its minibuffer window on the selected
frame.
* src/window.c (candidate_window_p): To qualify as candidate
it's not sufficient for the window's frame to just share the
minibuffer window - it must be active as well.

This follows up on recent problems with the fact that config.h
includes stdlib.h etc.; some files need to include stdlib.h later.
config.h generally should limit itself to includes that are
universally safe; outside of MS-Windows, only stdbool.h makes
the cut among the files currently included.  So, move the
other includes to just the files that need them (Bug#24506).
* configure.ac (config_opsysfile): Remove, as this generic hook
is no longer needed.
* lib-src/etags.c, src/unexmacosx.c, src/w32.c, src/w32notify.c:
* src/w32proc.c (_GNU_SOURCE):
Remove, as it’s OK for config.h to do this now.
* src/conf_post.h: Include <ms-w32.h>, instead of the generic
config_opsysfile, for simplicity as this old way of configuring is
now done only for the MS-Windows port.  Do not include <ms-w32.h>
if DEFER_MS_W32_H, for the benefit of the few files that want its
effects later.  Do not include <alloca.h>, <string.h>, or
<stdlib.h>.  Other files modified to include these headers as
needed, or to not include headers that are no longer needed.
* src/lisp.h: Include <alloca.h> and <string.h> here, since
some of the inline functions need them.
* src/regex.c: Include <alloca.h> if not emacs.  (If emacs,
we can rely on SAFE_ALLOCA.)  There is no longer any need to
worry about HAVE_ALLOCA_H.
* src/unexmacosx.c: Rely on config.h not including stdlib.h.
* src/w32.c, src/w32notify.c, src/w32proc.c (DEFER_MS_W32_H):
Define before including <config.h> first, and include <ms-w32.h>
after the troublesome headers.

This is for Fedora 24 when configured with --enable-gcc-warnings.
Although it does not fix all the problems, it fixes many of them.
* src/frame.c (XParseGeometry):
* src/nsterm.m (mouseDown:):
Mark locals with UNINIT to pacify --enable-gcc-warnings.
* src/image.c (PIX_MASK_DRAW, DefaultDepthOfScreen):
Remove unused macros.
(slurp_file xbm_scan, xbm_read_bitmap_data, xbm_load_image)
(xbm_file_p, xbm_load, xpm_scan, xpm_make_color_table_v)
(xpm_put_color_table_v, xpm_get_color_table_v)
(xpm_make_color_table_h, xpm_put_color_table_h)
(xpm_get_color_table_h, xpm_load_image, xpm_load)
(pbm_next_char, pbm_scan_number, pbm_load, svg_load)
(svg_load_image):
* src/nsfns.m (x_get_string_resource):
* src/nsimage.m (ns_image_from_XBM):
Fix pointer signedness problems.
* src/image.c (xpm_load_image, x_build_heuristic_mask, pbm_load)
(imagemagick_load_image): Omit unused locals.
* src/nsfns.m (ns_send_types, ns_return_types, ns_drag_types)
(Fx_open_connection):
* src/nsfont.m (ns_antialias_threshold):
Move extern decl to nsterm.h so it can be checked.
* src/nsmenu.m (svcsMenu, dockMenu):
Move to the only file that uses them, so they can be static.
* src/nsterm.h (find_and_call_menu_selection):
* src/nsterm.m (x_set_frame_alpha):
Omit duplicate decls.
* src/nsterm.h (ns_dump_glyphstring): Mark as EXTERNALLY_VISIBLE.
* src/nsfns.m (ns_tooltip, ns_display_info_for_name)
(ns_set_name_as_filename, x_set_menu_bar_lines)
(x_set_tool_bar_lines, x_set_internal_border_width):
* src/nsterm.m (ns_drag_types, ns_draw_text_decoration):
Now static.
* src/nsfns.m (ns_lisp_to_cursor_type, ns_cursor_type_to_lisp):
* src/nsterm.m (ns_free_indexed_color, ns_color_to_lisp):
Remove; unused.
* src/nsfont.m (ns_dump_glyphstring):
* src/nsterm.m (hide_bell, ns_get_color, ns_color_to_lisp)
(ns_clear_frame, keyDown:):
Fix signedness problem with printf arg.
* src/nsterm.h (ns_input_events, ns_finish_events):
* src/nsterm.m (ns_finish_events, hide_bell):
Prototype the decls.
* src/nsterm.m (NSMenuDidBeginTrackingNotification):
Omit unnecessary decl.
(dockMenu):
(mainMenu) [NS_IMPL_COCOA]: Now static, and in this file.
(ns_dumpglyphs_box_or_relief, changeFont:, initFrameFromEmacs:)
(toggleFullScreen:): Use FACE_FROM_ID instead of
FACE_FROM_ID_OR_NULL in contexts where the caller expects the
result to be non-null.
(applicationShouldTerminate:): Fix misleading indentation.

* src/frame.c (candidate_frame): Check minibuf argument before
comparing it to zero (Bug#24281).

This was backported from master
(cherry picked from commit dc491c3d)

This fixes the following warning:

	frame.c: In function ‘x_set_frame_parameters’:
	frame.c:3329:25: error: ‘width’ may be used uninitialized in
		this function [-Werror=maybe-uninitialized]
	       adjust_frame_size (f, width_change ? width : -1,
                         ^

* src/frame.c (x_set_frame_parameters): Drop width_changed and
height_changed variables in favour of storing that information in
width and height variables.

* src/frame.c (Fdelete_frame): Clarify doc-string.
* lisp/frame.el (delete-other-frames): Delete other frames on
FRAME's terminal instead of the current terminal.  Delete
non-minibuffer-only surrogate frames too.  See
http://lists.gnu.org/archive/html/emacs-devel/2016-08/msg00467.html
* doc/lispref/frames.texi (Deleting Frames): Minor fixes for
docs of `delete-frame' and `frame-live-p'.  Add entry for
`delete-other-frames'.
(Finding All Frames): Fix doc of `next-frame'.

* src/frame.c (candidate_frame): Check minibuf argument before
comparing it to zero (Bug#24281).

* src/charset.c (check_iso_charset_parameter):
* src/frame.c (store_frame_param):
* src/xselect.c (x_fill_property_data):
Use grave accent for left single quote in ‘error’ format strings.

The 'minibuffer' frame parameter is now t for a normal frame
(a frame with a root window plus a minibuffer window) and the
frame's minibuffer window for a minibuffer-less frame (a frame
whose minibuffer window is on another frame).  See also:
https://lists.gnu.org/archive/html/emacs-devel/2016-07/msg01259.html

* src/frame.c (make_frame, make_frame_without_minibuffer)
(make_minibuffer_frame): When assigning the frame's minibuffer
window also store corresponding 'minibuffer' frame parameter.
(store_frame_param): Move the 'minibuffer' parameter checks to
the beginning so we can silently override the value before it
gets stored in the parameter alist.  Fix error handling.
(Fframe_parameters): Return value of 'minibuffer' parameter
unmodified.

* lisp/frameset.el (frameset-filter-minibuffer): When the cdr of
the parameter is a minibuffer window, save (minibuffer . nil)
instead of (minibuffer . t).
(frameset--reuse-frame): To find a non-minibuffer-only frame
look out for a frame whose 'minibuffer' parameter is t instead
of that frame's minibuffer window.
(frameset-minibufferless-first-p): To find a minibuffer-less
frame look out for a frame whose 'minibuffer' parameter is a
window instead of nil.

* src/window.h (sanitize_window_sizes): Adjust prototype.
* src/frame.c (adjust_frame_size): Adjust calls.

This reverts commit 20038f8a.

I am reverting this change because it was applied without prior discussion
on emacs-devel, and has been found to break the NS port.  It needs more
testing and review before it should be applied here.

* src/dispextern.h (toplevel): Remove 'tip_frame' and 'tip_window' decls.
* src/frame.h (struct frame): New bitfield to indicate tooltip frame.
(FRAME_TOOLTIP_P): New macro.
* src/frame.c (make_frame): Mark new frame as regular frame by default.
(Fframe_list, delete_frame): Redesign to use FRAME_TOOLTIP_P.
(syms_of_frame): Don't DEFSYM 'Qtooltip' but use 'Qtooltip_timer'
and 'Qtooltip_parameters' instead.
* src/gtkutil.h (toplevel): Add 'xg_hide_tip' decl.
* src/gtkutil.c (xg_hide_tip): New function.
(xg_hide_tooltip): Adjust to cancel GTK event loop timeout if needed.
* src/menu.c (Fx_popup_menu): Adjust call to Fx_hide_tip.
* src/nsfns.c (toplevel): Remove 'tip_frame' leftover.
* src/w32fns.c (unwind_create_tip_frame): Remove.
(w32_display_monitor_attributes_list)
(w32_display_monitor_attributes_list_fallback): Use FRAME_TOOLTIP_P.
(toplevel): Remove 'tip_frame', 'tip_window' and 'last_show_tip_args'.
(x_create_tip_frame): Use do_unwind_create_frame.  Mark new frame
as a tooltip frame and record it using appropriate display info.
(x_hide_tooltip): Add frame arg.
(Fx_show_tip): Adjust to avoid globals, store tooltip parameters among
base frame parameters, store tooltip hide timer among tooltip frame
parameters.
(Fx_hide_tip): Add frame arg, hide tooltips on all displays by default.
(syms_of_w32fns): Don't DEFSYM 'Qtip_frame', don't initialize
and GC-protect 'tip_timer', 'tip_frame' and 'last_show_tip_args'.
* src/w32term.c (w32_read_socket): Extract tooltip window id from
per-display data.  Use FRAME_TOOLTIP_P where appropriate.
(x_new_font): Use FRAME_TOOLTIP_P.
(x_free_frame_resources): Reset pointer to tooltip frame.
* src/w32term.h (struct w32_display_info): New member 'w32_tooltip_frame'.
* src/xdisp.c (init_iterator, x_consider_frame_title, prepare_menu_bars):
Use FRAME_TOOLTIP_P.
* src/xfns.c (x_make_monitor_attribute_list)
(Fx_display_monitor_attributes_list): Likewise.
(unwind_create_tip_frame): Remove.
(toplevel): Remove 'tip_frame', 'tip_window' and 'last_show_tip_args'.
(x_create_tip_frame): Use do_unwind_create_frame.  Mark new frame
as a tooltip frame and record it using appropriate display info.
(x_hide_tooltip): Add frame arg.
(Fx_show_tip): Adjust to avoid globals, store tooltip parameters among
base frame parameters, store tooltip hide timer among tooltip frame
parameters.  To hide GTK system tooltip, use timeout hooked into GTK
event loop.
(Fx_hide_tip): Add frame arg, hide tooltips on all displays by default.
(syms_of_xfns): Don't DEFSYM 'Qtip_frame', don't initialize
and GC-protect 'tip_timer', 'tip_frame' and 'last_show_tip_args'.
* src/xterm.c (handle_one_xevent): Extract tooltip window id from
per-display data.  Use FRAME_TOOLTIP_P where appropriate.
(x_new_font, x_set_window_size): Use FRAME_TOOLTIP_P.
(x_free_frame_resources): Reset pointer to tooltip frame.
* src/xterm.h (struct x_display_info): New member 'x_tooltip_frame'.
(struct x_output) [USE_GTK_TOOLTIP]: New member 'ttip_timeout'.

* src/frame.c (Fframe_parameter): Avoid call to Fframe_parameters for the
parameters frequently requested by calls to 'next-line' and 'previous-line'.

* src/frame.c (x_set_frame_parameters): Avoid extra loop processing
foreground color, background color and font parameters.  Adjust
comments.

* src/composite.c (autocmp_chars):
* src/conf_post.h (DebPrint) [HAVE_NTGUI && !DebPrint && !EMACSDEBUG]:
Use simpler ((void) 0) for no-op expression returning void.
* src/dispextern.h [HAVE_WINDOW_SYSTEM]:
Include fontset.h, for face_for_char.
(FACE_SUITABLE_FOR_ASCII_CHAR_P, FACE_FOR_CHAR):
Now inline functions instead of macros.  This avoids the need for
all those casts to void.
(FACE_SUITABLE_FOR_ASCII_CHAR_P): Omit 2nd (unused) arg.
All uses changed.
* src/frame.c (Ficonify_frame, Fset_frame_position):
* src/xdisp.c (Fmove_point_visually, show_mouse_face):
* src/xdisp.c (note_mode_line_or_margin_highlight)
(note_mouse_highlight):
Assume HAVE_WINDOW_SYSTEM for simplicity, since the code should
now work either way without generating warnings.
* src/frame.c (display_available) [HAVE_WINDOW_SYSTEM]: New function.
(window_system_available) [HAVE_WINDOW_SYSTEM]: Move to frame.h.
(decode_window_system_frame): Use check_window_system instead of
rolling the code ourself.  Return needed only if HAVE_WINDOW_SYSTEM.
(decode_window_system_frame, check_window_system):
Merge the HAVE_WINDOW_SYSTEM and !HAVE_WINDOW_SYSTEM versions into one.
* src/frame.c (Ficonify_frame, Fset_frame_position):
* src/xdisp.c (show_mouse_face, define_frame_cursor1)
(note_mouse_highlight):
Narrow the scope of the HAVE_WINDOW_SYSTEM #ifdef;
this is a better way to pacify GCC.
* src/xdisp.c (x_set_left_fringe, x_set_right_fringe)
(x_set_right_divider_width, x_set_bottom_divider_width):
* src/xfns.c (x_set_internal_border_width):
Don’t use what are now function calls as lvalues.
* src/frame.h (WINDOW_SYSTEM_RETURN): New macro.
(decode_window_system_frame, check_window_system):
Use it, to avoid the need for duplicate declarations.
(window_system_available): Now an inline function.
(display_available): New decl.
(frame_dimension): New inline function.
(FRAME_FRINGE_COLS, FRAME_LEFT_FRINGE_WIDTH)
(FRAME_RIGHT_FRINGE_WIDTH, FRAME_TOTAL_FRINGE_WIDTH)
(FRAME_INTERNAL_BORDER_WIDTH, FRAME_RIGHT_DIVIDER_WIDTH)
(FRAME_BOTTOM_DIVIDER_WIDTH):
Use it, to avoid the need for duplicate definitions.
Now inline functions instead of macros.
* src/gnutls.c (gnutls_log_function2i): Remove.
* src/gnutls.h (GNUTLS_LOG2i): Use ‘message’ directly.
This avoids complaints about gnutls_log_function2i being defined
and not used on older platforms that do not need to call GNUTLS_LOG2i.
* src/image.c (DefaultDepthOfScreen) [0]: Remove unused macro.
* src/lisp.h (AUTO_STRING_WITH_LEN): Revert change from ‘type id =
expr’ to ‘type id; id = expr’, as this would suppress valid
jump-misses-init diagnostics.  Let’s find a better way to address
the problem.
* src/vm-limit.c (__MALLOC_HOOK_VOLATILE):
Define only if needed.
* src/xdisp.c (handle_single_display_spec):
Simplify fringe_bitmap computation.
(define_frame_cursor1): Do nothing unless in a window system.
All callers changed and simplified.
* src/xfaces.c (realize_default_face):
Use a simpler way to pacify GCC when a return value is not used
on some platforms.

* src/composite.c (autocmp_chars): Declare and set 'f' only if
HAVE_WINDOW_SYSTEM.

* src/dispextern.h (FACE_SUITABLE_FOR_ASCII_CHAR_P)
(FACE_FOR_CHAR): Explicitly discard unused arguments.

* src/font.c (font_open_entity): Declare 'min_width' where it is
first set, and only if HAVE_WINDOW_SYSTEM.

* src/frame.c [!HAVE_WINDOW_SYSTEM] (decode_window_system_frame):
Define _Noreturn version to avoid "suggest attribute noreturn"
compiler warning.
(check_window_system): Declare as _Noreturn.
(Ficonify_frame):
(Fset_frame_position): Don’t declare and set 'f'.

* src/frame.h [!HAVE_WINDOW_SYSTEM] (decode_window_system_frame)
(check_window_system):  Add _Noreturn prototypes.
(FRAME_FRINGE_COLS, FRAME_TOTAL_FRINGE_WIDTH)
(FRAME_LEFT_FRINGE_WIDTH, FRAME_RIGHT_FRINGE_WIDTH)
(FRAME_INTERNAL_BORDER_WIDTH, FRAME_RIGHT_DIVIDER_WIDTH)
(FRAME_BOTTOM_DIVIDER_WIDTH): Explicitly discard unused argument.

* src/xdisp.c (handle_single_display_spec): Declare
'fringe_bitmap' only if HAVE_WINDOW_SYSTEM.
(append_space_for_newline): Declare 'g' where it is first set.
(Fmove_point_visually): Declare and set 'target_is_eol_p' only if
HAVE_WINDOW_SYSTEM.
(show_mouse_face): Declare and set 'f' and 'phys_cursor_on_p' only
if HAVE_WINDOW_SYSTEM.
(note_mode_line_or_margin_highlight):
(note_mouse_highlight): Declare and set 'cursor' and 'pointer'
only if HAVE_WINDOW_SYSTEM.

* src/xfaces.c (realize_default_face): Declare and set 'face' only
if HAVE_X_WINDOWS.  Remove redundant #ifdef.

Nowadays GCC is smarter, or the Emacs code has mutated, or both,
and now is as good a time as any to remove uses of IF_LINT that
now seem to be unnecessary.
* lib-src/emacsclient.c (set_local_socket):
* lib-src/movemail.c (main) [MAIL_USE_MAILLOCK && HAVE_TOUCHLOCK]:
* src/buffer.c (fix_start_end_in_overlays, fix_overlays_before):
* src/casefiddle.c (casify_region):
* src/charset.c (load_charset_map):
* src/coding.c (decode_coding_object, encode_coding_object):
* src/data.c (Fmake_variable_buffer_local, Fmake_local_variable)
(cons_to_unsigned, cons_to_signed):
* src/frame.c (make_frame, x_set_frame_parameters):
* src/keyboard.c (read_event_from_main_queue):
* src/regex.c (regex_compile):
* src/syntax.c (back_comment):
* src/window.c (Frecenter):
* src/xfaces.c (Fx_list_fonts):
Remove IF_LINT that no longer seems necessary.
* src/image.c (png_load_body, jpeg_load_body): Simplify use of IF_LINT.
* src/keyboard.c (read_char): Use IF_LINT (volatile) rather than
a pragma dance to pacify GCC -Wclobbered.
* src/xdisp.c (x_produce_glyphs): Rewrite to avoid need for IF_LINT.

* src/xterm.c (x_connection_closed): Now _Noreturn, which should
mean we do not need IF_LINT any more.
(x_io_error_quitter): Now _Noreturn.  Put an 'assume (false)’
at the end, to forestall warnings from older compilers.

* config.bat:
* msdos/sedlisp.inp:
* msdos/sedlibmk.inp:
* msdos/sedleim.inp:
* msdos/sedadmin.inp:
* msdos/sed6.inp:
* msdos/sed3v2.inp:
* msdos/sed2v2.inp:
* msdos/sed1v2.inp: Adapt to Emacs 25.

* src/process.c (remove_slash_colon): Move out of "#ifdef
subprocesses" block, as it its called unconditionally.  Move
ADD_SUBFEATURE calls into "#ifdef subprocesses" block, as they
reference variables only defined in that block.
* src/msdos.h: Provide prototypes for IT_set_frame_parameters,
faccessat, msdos_fatal_signal, syms_of_msdos, pthread_sigmask,
dos_keysns, dos_keyread, run_msdos_command, and
syms_of_win16select, to avoid compiler warnings.
* src/msdos.c (SYS_ENVIRON): Define to either '_environ' or
'environ', depending on the DJGPP version.
Remove declarations of externally-visible Lisp objects, like
Qbackground_color and Qreverse.
(run_msdos_command): First argument is not signed, not unsigned.
Use SYS_ENVIRON.
(sys_select): Use 'timespec_cmp' instead of 'timespec_sign', as
the latter doesn't work when 'time_t' is an unsigned data type.
This caused idle timers to behave incorrectly: they only fired
after a keyboard input event.
* src/frame.c (adjust_frame_size) [MSDOS]: Account for
FRAME_TOP_MARGIN that isn't counted in the frame's number of
lines, but dos_set_window_size needs it to be added.
* src/lread.c (INFINITY, NAN) [DJGPP < 2.05]: Provide definitions.
* src/fns.c (sort_vector_copy) [__GNUC__ < 4]: Provide a prototype
that works around compilation errors with older GCC versions.
* src/w16select.c: Don't declare QCLIPBOARD and QPRIMARY as Lisp
Objects.
* src/filelock.c [MSDOS]: Ifdef away most of the code.  Provide
no-op implementations for 'lock_file' and 'unlock_file'.
(Ffile_locked_p) [MSDOS]: Always return nil.  This avoids multiple
ifdefs in all users of filelock.c functionality.
* src/conf_post.h (EOVERFLOW, SIZE_MAX) [DJGPP < 2.04]: Define.
* src/emacs.c [MSDOS]: Include dosfns.h, to avoid compiler
warnings.
* src/dosfns.h: Provide prototypes for dos_cleanup,
syms_of_dosfns, and init_dosfns.
* src/deps.mk (atimer.o): Depend on msdos.h.
(emacs.o): Depend on dosfns.h.
* src/atimer.c [MSDOS]: Include msdos.h, to avoid compiler
warnings.

* lisp/window.el (window--adjust-process-windows): Skip the body
if 'process-list' is not available.  This avoids failure to start
up on MS-DOS.
* lisp/vc/diff.el (diff-no-select): Test 'make-process', not
'start-process', as the latter is now available on all platforms.
* lisp/textmodes/ispell.el (ispell-async-processp): Replace
'start-process' with 'make-process' in a comment.
* lisp/term/internal.el (IT-unicode-translations): Modify and add
a few translations to display Info files with Unicode markup.  Fix
an ancient off-by-one mismatch error with Unicode codepoints.
* lisp/progmodes/compile.el (compilation-start): Test
'make-process', not 'start-process', as the latter is now
available on all platforms.
* lisp/man.el (Man-build-man-command, Man-getpage-in-background):
Test 'make-process', not 'start-process', as the latter is now
available on all platforms.
* lisp/international/mule-cmds.el (set-coding-system-map): Test
'make-process', not 'start-process', as the latter is now
available on all platforms.
* lisp/eshell/esh-cmd.el (eshell-do-pipelines-synchronously): Doc
fix.
(eshell-execute-pipeline): Test 'make-process', not
'start-process', as the latter is now available on all platforms.

This was inspired by commit e65c3079,
which fixed a bug where the C name for a symbol disagreed with the
symbol name itself.  Fix other instances of disagreements that I found.
Although this doesn’t fix a bug, it should make code easier to follow.
The remaining disagreements are idiosyncratic: Qminus, Qplus,
Qsans__serif, Qbackquote, Qcomma, Qcomma_at, Qcomma_dot.
All uses changed.
* src/alloc.c (QAutomatic_GC): Rename from Qautomatic_gc.
* src/dbusbind.c (QCsystem): Rename from QCdbus_system_bus.
(QCsession): Rename from QCdbus_session_bus.
(QCtimeout): Rename from QCdbus_timeout.
(QCbyte): Rename from QCdbus_type_byte.
(QCboolean): Rename from QCdbus_type_boolean.
(QCint16): Rename from QCdbus_type_int16.
(QCuint16): Rename from QCdbus_type_uint16.
(QCint32): Rename from QCdbus_type_int32.
(QCuint32): Rename from QCdbus_type_uint32.
(QCint64): Rename from QCdbus_type_int64.
(QCuint64): Rename from QCdbus_type_uint64.
(QCdouble): Rename from QCdbus_type_double.
(QCstring): Rename from QCdbus_type_string.
(QCobject_path): Rename from QCdbus_type_object_path.
(QCsignature): Rename from QCdbus_type_signature.
(QCunix_fd): Rename from QCdbus_type_unix_fd.
(QCarray): Rename from QCdbus_type_array.
(QCvariant): Rename from QCdbus_type_variant.
(QCstruct): Rename from QCdbus_type_struct.
(QCdict_entry): Rename from QCdbus_type_dict_entry.
(QCserial): Rename from QCdbus_registered_serial.
(QCmethod): Rename from QCdbus_registered_method.
(QCsignal): Rename from QCdbus_registered_signal.
* src/emacs-module.c (Qinternal__module_call):
Rename from Qinternal_module_call.
* src/frame.c (Qwindow__pixel_to_total):
Rename from Qwindow_pixel_to_total.
* src/gnutls.c (QChostname): Rename from QCgnutls_bootprop_hostname.
(QCpriority): Rename from QCgnutls_bootprop_priority.
(QCtrustfiles): Rename from QCgnutls_bootprop_trustfiles.
(QCkeylist): Rename from QCgnutls_bootprop_keylist.
(QCcrlfiles): Rename from QCgnutls_bootprop_crlfiles.
(QCmin_prime_bits): Rename from QCgnutls_bootprop_min_prime_bits.
(QCloglevel): Rename from QCgnutls_bootprop_loglevel.
(QCcomplete_negotiation): Rename from QCgnutls_complete_negotiation.
(QCverify_flags): Rename from QCgnutls_bootprop_verify_flags.
(QCverify_error): Rename from QCgnutls_bootprop_verify_error.
* src/w32fns.c (Qfont_parameter): Rename from Qfont_param.
(Qgnutls): Rename from Qgnutls_dll.
(Qlibxml2): Rename from Qlibxml2_dll.
(Qzlib): Rename from Qzlib_dll.
* src/w32select.c (Qutf_16le_dos): Rename from QUNICODE.
* src/window.c (Qwindow__resize_root_window):
Rename from Qwindow_resize_root_window.
(Qwindow__resize_root_window_vertically):
Rename from Qwindow_resize_root_window_vertically.
(Qwindow__sanitize_window_sizes):
Rename from Qwindow_sanitize_window_sizes.
(Qwindow__pixel_to_total): Rename from Qwindow_pixel_to_total.
* src/xdisp.c (Qredisplay_internal_xC_functionx):
Rename from Qredisplay_internal.
* src/xfns.c (Qfont_parameter): Rename from Qfont_param.
* src/xselect.c (Q_EMACS_TMP_): Rename from QEMACS_TMP.

* src/frame.c (DEFAULT_ROWS): Enlarge to 36, so that the initial
window displayed by "emacs -q" has enough space to show the whole
text even if it includes 2 lines talking about recovering crashes
sessions.  (Bug#23074)

* lisp/startup.el (use-fancy-splash-screens-p): Fix off-by-one
error when computing the window-height from frame-height.

* etc/NEWS: Mention the change.

Work around Bug#22884 by rewording comments and strings to avoid ‘(’
at the start of a line unless it starts a function.  This change
is a short-term hack; in the longer run we plan to fix cc-mode’s
performance for C files that have ‘(’ at the start of a line in a
comment or string.

* src/frame.c (tooltip_reuse_hidden_frame): New option.
* src/w32fns.c (x_create_tip_frame): Remove argument TEXT.  Fix
handling of dividers.
(x_hide_tip): New function.
(Fx_show_tip): Try to reuse old tooltip frame when
`tooltip-reuse-hidden-frame' is non-nil and frame parameters
have not changed.  Insert STRING here instead of passing it to
x_create_tip_frame.  Compute size of tooltip window with
Fwindow_text_pixel_size.  Obey Vw32_tooltip_extra_pixels when
padding tooltip window.
(Fx_hide_tip): Call x_hide_tip.
(Vw32_tooltip_extra_pixels): New variable.
* src/xdisp.c (Fwindow_text_pixel_size): Don't return negative y
value.  Fix doc-string.
* src/xfns.c (x_create_tip_frame): Remove argument TEXT.  Call
make_frame with mini_p argument false.
(x_hide_tip): New function.
(Fx_show_tip): Try to reuse old tooltip frame when
`tooltip-reuse-hidden-frame' is non-nil and frame parameters
have not changed.  Insert STRING here instead of passing it to
x_create_tip_frame.  Compute size of tooltip window with
Fwindow_text_pixel_size.
(Fx_hide_tip): Call x_hide_tip.
* lisp/cus-start.el (tooltip-reuse-hidden-frame): Add
customization entry.

* src/frame.c (make_initial_frame): Allocate glyph matrices (Bug#22787).

* src/dispnew.c (clear_glyph_matrix_rows): matrix->nrows can be 0.

Copyright-paperwork-exempt: yes

(1) Run `window-configuration-change-hook' if and only if at least
one window was deleted or created or shows another buffer since
last redisplay.

(2) Run `window-size-change-functions' if and only if at least
one window changed its size since last redisplay (in a few cases
`window-size-change-functions' will also run when no window
changed its size).

(3) Provide two functions `window-pixel-height-before-size-change'
and `window-pixel-width-before-size-change' that allow to easily
detect which window changed size.

* src/frame.h (struct frame): New boolean member
window_configuration_changed.
(FRAME_WINDOW_SIZES_CHANGED): Remove macro.
(FRAME_WINDOW_CONFIGURATION_CHANGED): New macro.
* src/frame.c (adjust_frame_size): Don't run
`window-configuration-change-hook'.
* src/window.h (struct window): New fields
pixel_width_before_size_change and pixel_height_before_size_change.
(WINDOW_INTERNAL_P): New macro.
* src/window.c (Fwindow_pixel_width_before_size_change)
(Fwindow_pixel_height_before_size_change): New functions.
(Fdelete_other_windows_internal, Fwindow_resize_apply)
(resize_frame_windows, Fsplit_window_internal)
(Fdelete_window_internal, grow_mini_window)
(shrink_mini_window, Fresize_mini_window_internal): Don't call
FRAME_WINDOW_SIZES_CHANGED.
(window_size_changed, window_set_before_size_change_sizes)
(run_window_size_change_functions): New functions.
(make_window): Initialize pixel_width_before_size_change and
pixel_height_before_size_change.
(Fdelete_window_internal): Don't call
run_window_configuration_change_hook.
(struct saved_window): Add pixel_height_before_size_change and
pixel_width_before_size_change.
(Fset_window_configuration): Try to identify window configuration
changes correctly so run_window_configuration_change_hook and
run_window_size_change_functions run only if configuration and size
really changed.
(save_window_save): Set the pixel_height_before_size_change and
pixel_width_before_size_change fields.
(Vwindow_size_change_functions): Move here definiton from xdisp.c.
* src/xdisp.c (prepare_menu_bars, redisplay_internal): Call
run_window_size_change_functions.
(Vwindow_size_change_functions): Move definition to window.c.
* src/xfns.c (x_set_menu_bar_lines): Don't call
run_window_configuration_change_hook.
* doc/lispref/windows.texi (Window Sizes): Document new
functions `window-pixel-height-before-size-change' and
`window-pixel-width-before-size-change'.
(Window Configurations): Mention that this may trigger
execution of `window-size-change-functions' although no window
changed size.
(Window Hooks): Update descriptions of `window-size-change-functions'
and `window-configuration-change-hook'.