Overhaul and simplify single_kboard API. Allow calls to `recursive-edit' in...
Overhaul and simplify single_kboard API. Allow calls to `recursive-edit' in process filters. Small fixes. * lisp/server.el (server-process-filter): Protect `display-splash-screen' call in a condition-case. Explain why. * src/callint.c (Fcall_interactively): Update call to `temporarily_switch_to_single_kboard'. * src/fns.c (Fy_or_n_p): Ditto. * src/frame.c (Fdelete_frame): Remove unused variable `count'. * src/keyboard.c (wrong_kboard_jmpbuf): Remove global variable. * src/keyboard.c (read_char): Add wrong_kboard_jmpbuf parameter to allow for recursive calls. Update longjmp invocations. Remember the original current_kboard, and longjmp to `wrong_kboard_jmpbuf' when a filter, timer or sentinel changes it. Comment out unnecessary calls to `record_single_kboard_state' and `any_kboard_state'. Update recursive calls. * src/keyboard.c (read_key_sequence): Add `wrong_kboard_jmpbuf' local variable. Update setjmp and read_char calls. Abort if interrupted_kboard died in read_char. * src/keyboard.c (any_kboard_state, single_kboard_state) (record_single_kboard_state): Comment out obsolete functions. (push_frame_kboard): Remove function. (pop_kboard): Switch out of single_kboard mode if the kboard has been deleted. (temporarily_switch_to_single_kboard): Change first parameter to a frame pointer. Throw an error when caller wants to change kboards while in single_kboard mode. (restore_kboard_configuration): Abort if pop_kboard changed the kboard in single_kboard mode. (Frecursive_edit): Switch to single_kboard mode only in nested command loops. (cmd_error, command_loop, command_loop_1, timer_check): Comment out unnecessary call to `any_kboard_state' and `record_single_kboard_state'. * src/keyboard.c (delete_kboard): Exit single_kboard mode if we have just deleted that kboard. * src/keyboard.c (interrupt_signal): Use `Fkill_emacs' to exit Emacs, not `fatal_error_signal'. * src/keyboard.h (read_char, single_kboard_state) (record_single_kboard_state): Remove. (temporarily_switch_to_single_kboard): Update. * src/lread.c: Include setjmp.h. Update declaration of `read_char'. (read_filtered_event): Call `read_char' with a local `wrong_kboard_jmpbuf'. * src/minibuf.c (read_minibuf): Update call to `temporarily_switch_to_single_kboard'. * src/termchar.h (tty_display_info): Rename `previous_terminal_frame' member to `previous_frame'. * src/xdisp.c (redisplay_internal): Update references to `previous_terminal_frame'. (display_mode_line, Fformat_mode_line): Replace calls to `push_frame_kboard' with `push_kboard'. git-archimport-id: firstname.lastname@example.org/emacs--multi-tty--0--patch-489
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