/* Keyboard and mouse input; editor command loop. Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of GNU Emacs. GNU Emacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #include #include #include "termchar.h" #include "termopts.h" #include "lisp.h" #include "termhooks.h" #include "macros.h" #include "keyboard.h" #include "frame.h" #include "window.h" #include "commands.h" #include "buffer.h" #include "charset.h" #include "disptab.h" #include "dispextern.h" #include "syntax.h" #include "intervals.h" #include "keymap.h" #include "blockinput.h" #ifdef MEADOW #include #include "mw32sync.h" #include "mw32mci.h" #include "coding.h" #endif #include "puresize.h" #include "systime.h" #include "atimer.h" #include #include #ifdef HAVE_GTK_AND_PTHREAD #include #endif #ifdef MSDOS #include "msdos.h" #include #else /* not MSDOS */ #ifndef VMS #include #endif #endif /* not MSDOS */ #include "syssignal.h" #include "systty.h" #include #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_FCNTL_H #include #endif /* This is to get the definitions of the XK_ symbols. */ #ifdef HAVE_X_WINDOWS #include "xterm.h" #endif #ifdef HAVE_NTGUI #ifdef MEADOW #include "mw32term.h" #else #include "w32term.h" #endif #endif /* HAVE_NTGUI */ #ifdef MAC_OS #include "macterm.h" #endif #ifndef USE_CRT_DLL extern int errno; #endif /* Variables for blockinput.h: */ /* Non-zero if interrupt input is blocked right now. */ volatile int interrupt_input_blocked; /* Nonzero means an input interrupt has arrived during the current critical section. */ int interrupt_input_pending; /* File descriptor to use for input. */ extern int input_fd; #ifdef HAVE_WINDOW_SYSTEM /* Make all keyboard buffers much bigger when using X windows. */ #ifdef MAC_OS8 /* But not too big (local data > 32K error) if on Mac OS Classic. */ #define KBD_BUFFER_SIZE 512 #else #define KBD_BUFFER_SIZE 4096 #endif #else /* No X-windows, character input */ #define KBD_BUFFER_SIZE 4096 #endif /* No X-windows */ #undef abs #define abs(x) ((x) >= 0 ? (x) : -(x)) /* Following definition copied from eval.c */ struct backtrace { struct backtrace *next; Lisp_Object *function; Lisp_Object *args; /* Points to vector of args. */ int nargs; /* length of vector. If nargs is UNEVALLED, args points to slot holding list of unevalled args */ char evalargs; /* Nonzero means call value of debugger when done with this operation. */ char debug_on_exit; }; #ifdef MULTI_KBOARD KBOARD *initial_kboard; KBOARD *current_kboard; KBOARD *all_kboards; int single_kboard; #else KBOARD the_only_kboard; #endif /* Non-nil disable property on a command means do not execute it; call disabled-command-function's value instead. */ Lisp_Object Qdisabled, Qdisabled_command_function; #define NUM_RECENT_KEYS (300) int recent_keys_index; /* Index for storing next element into recent_keys */ int total_keys; /* Total number of elements stored into recent_keys */ Lisp_Object recent_keys; /* Vector holds the last NUM_RECENT_KEYS keystrokes */ /* Vector holding the key sequence that invoked the current command. It is reused for each command, and it may be longer than the current sequence; this_command_key_count indicates how many elements actually mean something. It's easier to staticpro a single Lisp_Object than an array. */ Lisp_Object this_command_keys; int this_command_key_count; /* 1 after calling Freset_this_command_lengths. Usually it is 0. */ int this_command_key_count_reset; /* This vector is used as a buffer to record the events that were actually read by read_key_sequence. */ Lisp_Object raw_keybuf; int raw_keybuf_count; #define GROW_RAW_KEYBUF \ if (raw_keybuf_count == XVECTOR (raw_keybuf)->size) \ { \ int newsize = 2 * XVECTOR (raw_keybuf)->size; \ Lisp_Object new; \ new = Fmake_vector (make_number (newsize), Qnil); \ bcopy (XVECTOR (raw_keybuf)->contents, XVECTOR (new)->contents, \ raw_keybuf_count * sizeof (Lisp_Object)); \ raw_keybuf = new; \ } /* Number of elements of this_command_keys that precede this key sequence. */ int this_single_command_key_start; /* Record values of this_command_key_count and echo_length () before this command was read. */ static int before_command_key_count; static int before_command_echo_length; extern int minbuf_level; extern int message_enable_multibyte; extern struct backtrace *backtrace_list; /* If non-nil, the function that implements the display of help. It's called with one argument, the help string to display. */ Lisp_Object Vshow_help_function; /* If a string, the message displayed before displaying a help-echo in the echo area. */ Lisp_Object Vpre_help_message; /* Nonzero means do menu prompting. */ static int menu_prompting; /* Character to see next line of menu prompt. */ static Lisp_Object menu_prompt_more_char; /* For longjmp to where kbd input is being done. */ static jmp_buf getcjmp; /* True while doing kbd input. */ int waiting_for_input; /* True while displaying for echoing. Delays C-g throwing. */ int echoing; /* Non-null means we can start echoing at the next input pause even though there is something in the echo area. */ static struct kboard *ok_to_echo_at_next_pause; /* The kboard last echoing, or null for none. Reset to 0 in cancel_echoing. If non-null, and a current echo area message exists, and echo_message_buffer is eq to the current message buffer, we know that the message comes from echo_kboard. */ struct kboard *echo_kboard; /* The buffer used for echoing. Set in echo_now, reset in cancel_echoing. */ Lisp_Object echo_message_buffer; /* Nonzero means disregard local maps for the menu bar. */ static int inhibit_local_menu_bar_menus; /* Nonzero means C-g should cause immediate error-signal. */ int immediate_quit; /* The user's hook function for outputting an error message. */ Lisp_Object Vcommand_error_function; /* The user's ERASE setting. */ Lisp_Object Vtty_erase_char; /* Character to recognize as the help char. */ Lisp_Object Vhelp_char; /* List of other event types to recognize as meaning "help". */ Lisp_Object Vhelp_event_list; /* Form to execute when help char is typed. */ Lisp_Object Vhelp_form; /* Command to run when the help character follows a prefix key. */ Lisp_Object Vprefix_help_command; /* List of items that should move to the end of the menu bar. */ Lisp_Object Vmenu_bar_final_items; /* Non-nil means show the equivalent key-binding for any M-x command that has one. The value can be a length of time to show the message for. If the value is non-nil and not a number, we wait 2 seconds. */ Lisp_Object Vsuggest_key_bindings; /* How long to display an echo-area message when the minibuffer is active. If the value is not a number, such messages don't time out. */ Lisp_Object Vminibuffer_message_timeout; /* Character that causes a quit. Normally C-g. If we are running on an ordinary terminal, this must be an ordinary ASCII char, since we want to make it our interrupt character. If we are not running on an ordinary terminal, it still needs to be an ordinary ASCII char. This character needs to be recognized in the input interrupt handler. At this point, the keystroke is represented as a struct input_event, while the desired quit character is specified as a lispy event. The mapping from struct input_events to lispy events cannot run in an interrupt handler, and the reverse mapping is difficult for anything but ASCII keystrokes. FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an ASCII character. */ int quit_char; extern Lisp_Object current_global_map; extern int minibuf_level; /* If non-nil, this is a map that overrides all other local maps. */ Lisp_Object Voverriding_local_map; /* If non-nil, Voverriding_local_map applies to the menu bar. */ Lisp_Object Voverriding_local_map_menu_flag; /* Keymap that defines special misc events that should be processed immediately at a low level. */ Lisp_Object Vspecial_event_map; /* Current depth in recursive edits. */ int command_loop_level; /* Total number of times command_loop has read a key sequence. */ EMACS_INT num_input_keys; /* Last input character read as a command. */ Lisp_Object last_command_char; /* Last input character read as a command, not counting menus reached by the mouse. */ Lisp_Object last_nonmenu_event; /* Last input character read for any purpose. */ Lisp_Object last_input_char; /* If not Qnil, a list of objects to be read as subsequent command input. */ Lisp_Object Vunread_command_events; /* If not Qnil, a list of objects to be read as subsequent command input including input method processing. */ Lisp_Object Vunread_input_method_events; /* If not Qnil, a list of objects to be read as subsequent command input but NOT including input method processing. */ Lisp_Object Vunread_post_input_method_events; /* If not -1, an event to be read as subsequent command input. */ EMACS_INT unread_command_char; /* If not Qnil, this is a switch-frame event which we decided to put off until the end of a key sequence. This should be read as the next command input, after any unread_command_events. read_key_sequence uses this to delay switch-frame events until the end of the key sequence; Fread_char uses it to put off switch-frame events until a non-ASCII event is acceptable as input. */ Lisp_Object unread_switch_frame; /* A mask of extra modifier bits to put into every keyboard char. */ EMACS_INT extra_keyboard_modifiers; /* Char to use as prefix when a meta character is typed in. This is bound on entry to minibuffer in case ESC is changed there. */ Lisp_Object meta_prefix_char; /* Last size recorded for a current buffer which is not a minibuffer. */ static int last_non_minibuf_size; /* Number of idle seconds before an auto-save and garbage collection. */ static Lisp_Object Vauto_save_timeout; /* Total number of times read_char has returned. */ int num_input_events; /* Total number of times read_char has returned, outside of macros. */ EMACS_INT num_nonmacro_input_events; /* Auto-save automatically when this many characters have been typed since the last time. */ static EMACS_INT auto_save_interval; /* Value of num_nonmacro_input_events as of last auto save. */ int last_auto_save; /* The command being executed by the command loop. Commands may set this, and the value set will be copied into current_kboard->Vlast_command instead of the actual command. */ Lisp_Object Vthis_command; /* This is like Vthis_command, except that commands never set it. */ Lisp_Object real_this_command; /* If the lookup of the command returns a binding, the original command is stored in this-original-command. It is nil otherwise. */ Lisp_Object Vthis_original_command; /* The value of point when the last command was started. */ int last_point_position; /* The buffer that was current when the last command was started. */ Lisp_Object last_point_position_buffer; /* The window that was selected when the last command was started. */ Lisp_Object last_point_position_window; /* The frame in which the last input event occurred, or Qmacro if the last event came from a macro. We use this to determine when to generate switch-frame events. This may be cleared by functions like Fselect_frame, to make sure that a switch-frame event is generated by the next character. */ Lisp_Object internal_last_event_frame; /* A user-visible version of the above, intended to allow users to figure out where the last event came from, if the event doesn't carry that information itself (i.e. if it was a character). */ Lisp_Object Vlast_event_frame; /* The timestamp of the last input event we received from the X server. X Windows wants this for selection ownership. */ unsigned long last_event_timestamp; Lisp_Object Qself_insert_command; Lisp_Object Qforward_char; Lisp_Object Qbackward_char; Lisp_Object Qundefined; Lisp_Object Qtimer_event_handler; /* read_key_sequence stores here the command definition of the key sequence that it reads. */ Lisp_Object read_key_sequence_cmd; /* Echo unfinished commands after this many seconds of pause. */ Lisp_Object Vecho_keystrokes; /* Form to evaluate (if non-nil) when Emacs is started. */ Lisp_Object Vtop_level; /* User-supplied table to translate input characters. */ Lisp_Object Vkeyboard_translate_table; /* Keymap mapping ASCII function key sequences onto their preferred forms. */ extern Lisp_Object Vfunction_key_map; /* Another keymap that maps key sequences into key sequences. This one takes precedence over ordinary definitions. */ extern Lisp_Object Vkey_translation_map; /* If non-nil, this implements the current input method. */ Lisp_Object Vinput_method_function; Lisp_Object Qinput_method_function; /* When we call Vinput_method_function, this holds the echo area message that was just erased. */ Lisp_Object Vinput_method_previous_message; /* Non-nil means deactivate the mark at end of this command. */ Lisp_Object Vdeactivate_mark; /* Menu bar specified in Lucid Emacs fashion. */ Lisp_Object Vlucid_menu_bar_dirty_flag; Lisp_Object Qrecompute_lucid_menubar, Qactivate_menubar_hook; Lisp_Object Qecho_area_clear_hook; /* Hooks to run before and after each command. */ Lisp_Object Qpre_command_hook, Vpre_command_hook; Lisp_Object Qpost_command_hook, Vpost_command_hook; Lisp_Object Qcommand_hook_internal, Vcommand_hook_internal; /* List of deferred actions to be performed at a later time. The precise format isn't relevant here; we just check whether it is nil. */ Lisp_Object Vdeferred_action_list; /* Function to call to handle deferred actions, when there are any. */ Lisp_Object Vdeferred_action_function; Lisp_Object Qdeferred_action_function; Lisp_Object Qinput_method_exit_on_first_char; Lisp_Object Qinput_method_use_echo_area; /* File in which we write all commands we read. */ FILE *dribble; /* Nonzero if input is available. */ int input_pending; /* 1 if should obey 0200 bit in input chars as "Meta", 2 if should keep 0200 bit in input chars. 0 to ignore the 0200 bit. */ int meta_key; extern char *pending_malloc_warning; /* Circular buffer for pre-read keyboard input. */ static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; /* Pointer to next available character in kbd_buffer. If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next available char is in kbd_buffer[0]. */ static struct input_event *kbd_fetch_ptr; /* Pointer to next place to store character in kbd_buffer. This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next character should go in kbd_buffer[0]. */ static struct input_event * volatile kbd_store_ptr; /* The above pair of variables forms a "queue empty" flag. When we enqueue a non-hook event, we increment kbd_store_ptr. When we dequeue a non-hook event, we increment kbd_fetch_ptr. We say that there is input available if the two pointers are not equal. Why not just have a flag set and cleared by the enqueuing and dequeuing functions? Such a flag could be screwed up by interrupts at inopportune times. */ /* If this flag is non-nil, we check mouse_moved to see when the mouse moves, and motion events will appear in the input stream. Otherwise, mouse motion is ignored. */ Lisp_Object do_mouse_tracking; /* Symbols to head events. */ Lisp_Object Qmouse_movement; Lisp_Object Qscroll_bar_movement; Lisp_Object Qswitch_frame; Lisp_Object Qdelete_frame; Lisp_Object Qiconify_frame; Lisp_Object Qmake_frame_visible; Lisp_Object Qselect_window; Lisp_Object Qhelp_echo; #ifdef HAVE_MOUSE Lisp_Object Qmouse_fixup_help_message; #endif /* Symbols to denote kinds of events. */ Lisp_Object Qfunction_key; Lisp_Object Qmouse_click; #if defined (WINDOWSNT) || defined (MAC_OS) Lisp_Object Qlanguage_change; #endif Lisp_Object Qdrag_n_drop; Lisp_Object Qsave_session; #ifdef MAC_OS Lisp_Object Qmac_apple_event; #endif /* Lisp_Object Qmouse_movement; - also an event header */ /* Properties of event headers. */ Lisp_Object Qevent_kind; Lisp_Object Qevent_symbol_elements; /* menu item parts */ Lisp_Object Qmenu_alias; Lisp_Object Qmenu_enable; Lisp_Object QCenable, QCvisible, QChelp, QCfilter, QCkeys, QCkey_sequence; Lisp_Object QCbutton, QCtoggle, QCradio; extern Lisp_Object Vdefine_key_rebound_commands; extern Lisp_Object Qmenu_item; /* An event header symbol HEAD may have a property named Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS); BASE is the base, unmodified version of HEAD, and MODIFIERS is the mask of modifiers applied to it. If present, this is used to help speed up parse_modifiers. */ Lisp_Object Qevent_symbol_element_mask; /* An unmodified event header BASE may have a property named Qmodifier_cache, which is an alist mapping modifier masks onto modified versions of BASE. If present, this helps speed up apply_modifiers. */ Lisp_Object Qmodifier_cache; /* Symbols to use for parts of windows. */ Lisp_Object Qmode_line; Lisp_Object Qvertical_line; Lisp_Object Qvertical_scroll_bar; Lisp_Object Qmenu_bar; extern Lisp_Object Qleft_margin, Qright_margin; extern Lisp_Object Qleft_fringe, Qright_fringe; extern Lisp_Object QCmap; Lisp_Object recursive_edit_unwind (), command_loop (); Lisp_Object Fthis_command_keys (); Lisp_Object Qextended_command_history; EMACS_TIME timer_check (); extern Lisp_Object Vhistory_length, Vtranslation_table_for_input; extern char *x_get_keysym_name (); static void record_menu_key (); static int echo_length (); Lisp_Object Qpolling_period; /* List of absolute timers. Appears in order of next scheduled event. */ Lisp_Object Vtimer_list; /* List of idle time timers. Appears in order of next scheduled event. */ Lisp_Object Vtimer_idle_list; /* Incremented whenever a timer is run. */ int timers_run; extern Lisp_Object Vprint_level, Vprint_length; /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt happens. */ EMACS_TIME *input_available_clear_time; /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. Default is 1 if INTERRUPT_INPUT is defined. */ int interrupt_input; /* Nonzero while interrupts are temporarily deferred during redisplay. */ int interrupts_deferred; /* Nonzero means use ^S/^Q for flow control. */ int flow_control; /* Allow m- file to inhibit use of FIONREAD. */ #ifdef BROKEN_FIONREAD #undef FIONREAD #endif /* We are unable to use interrupts if FIONREAD is not available, so flush SIGIO so we won't try. */ #if !defined (FIONREAD) #ifdef SIGIO #undef SIGIO #endif #endif /* If we support a window system, turn on the code to poll periodically to detect C-g. It isn't actually used when doing interrupt input. */ #if defined(HAVE_WINDOW_SYSTEM) && !defined(USE_ASYNC_EVENTS) #ifndef MEADOW #define POLL_FOR_INPUT #endif #endif /* After a command is executed, if point is moved into a region that has specific properties (e.g. composition, display), we adjust point to the boundary of the region. But, if a command sets this variable to non-nil, we suppress this point adjustment. This variable is set to nil before reading a command. */ Lisp_Object Vdisable_point_adjustment; /* If non-nil, always disable point adjustment. */ Lisp_Object Vglobal_disable_point_adjustment; /* The time when Emacs started being idle. */ static EMACS_TIME timer_idleness_start_time; /* After Emacs stops being idle, this saves the last value of timer_idleness_start_time from when it was idle. */ static EMACS_TIME timer_last_idleness_start_time; /* If non-nil, events produced by disabled menu items and tool-bar buttons are not ignored. Help functions bind this to allow help on those items and buttons. */ Lisp_Object Venable_disabled_menus_and_buttons; /* Global variable declarations. */ /* Flags for readable_events. */ #define READABLE_EVENTS_DO_TIMERS_NOW (1 << 0) #define READABLE_EVENTS_FILTER_EVENTS (1 << 1) #define READABLE_EVENTS_IGNORE_SQUEEZABLES (1 << 2) /* Function for init_keyboard to call with no args (if nonzero). */ void (*keyboard_init_hook) (); static int read_avail_input P_ ((int)); static void get_input_pending P_ ((int *, int)); static int readable_events P_ ((int)); static Lisp_Object read_char_x_menu_prompt P_ ((int, Lisp_Object *, Lisp_Object, int *)); static Lisp_Object read_char_x_menu_prompt (); static Lisp_Object read_char_minibuf_menu_prompt P_ ((int, int, Lisp_Object *)); static Lisp_Object make_lispy_event P_ ((struct input_event *)); #ifdef HAVE_MOUSE static Lisp_Object make_lispy_movement P_ ((struct frame *, Lisp_Object, enum scroll_bar_part, Lisp_Object, Lisp_Object, unsigned long)); #endif static Lisp_Object modify_event_symbol P_ ((int, unsigned, Lisp_Object, Lisp_Object, char **, Lisp_Object *, unsigned)); static Lisp_Object make_lispy_switch_frame P_ ((Lisp_Object)); static int parse_solitary_modifier P_ ((Lisp_Object)); static int parse_solitary_modifier (); static void save_getcjmp P_ ((jmp_buf)); static void save_getcjmp (); static void restore_getcjmp P_ ((jmp_buf)); static Lisp_Object apply_modifiers P_ ((int, Lisp_Object)); static void clear_event P_ ((struct input_event *)); static void any_kboard_state P_ ((void)); static SIGTYPE interrupt_signal P_ ((int signalnum)); static void timer_start_idle P_ ((void)); static void timer_stop_idle P_ ((void)); static void timer_resume_idle P_ ((void)); static SIGTYPE handle_user_signal P_ ((int)); static char *find_user_signal_name P_ ((int)); static int store_user_signal_events P_ ((void)); /* Nonzero means don't try to suspend even if the operating system seems to support it. */ static int cannot_suspend; extern Lisp_Object Qidentity, Qonly; /* Install the string STR as the beginning of the string of echoing, so that it serves as a prompt for the next character. Also start echoing. */ void echo_prompt (str) Lisp_Object str; { current_kboard->echo_string = str; current_kboard->echo_after_prompt = SCHARS (str); echo_now (); } /* Add C to the echo string, if echoing is going on. C can be a character, which is printed prettily ("M-C-x" and all that jazz), or a symbol, whose name is printed. */ void echo_char (c) Lisp_Object c; { if (current_kboard->immediate_echo) { int size = KEY_DESCRIPTION_SIZE + 100; char *buffer = (char *) alloca (size); char *ptr = buffer; Lisp_Object echo_string; echo_string = current_kboard->echo_string; /* If someone has passed us a composite event, use its head symbol. */ c = EVENT_HEAD (c); if (INTEGERP (c)) { ptr = push_key_description (XINT (c), ptr, 1); } else if (SYMBOLP (c)) { Lisp_Object name = SYMBOL_NAME (c); int nbytes = SBYTES (name); if (size - (ptr - buffer) < nbytes) { int offset = ptr - buffer; size = max (2 * size, size + nbytes); buffer = (char *) alloca (size); ptr = buffer + offset; } ptr += copy_text (SDATA (name), ptr, nbytes, STRING_MULTIBYTE (name), 1); } if ((NILP (echo_string) || SCHARS (echo_string) == 0) && help_char_p (c)) { const char *text = " (Type ? for further options)"; int len = strlen (text); if (size - (ptr - buffer) < len) { int offset = ptr - buffer; size += len; buffer = (char *) alloca (size); ptr = buffer + offset; } bcopy (text, ptr, len); ptr += len; } /* Replace a dash from echo_dash with a space, otherwise add a space at the end as a separator between keys. */ if (STRINGP (echo_string) && SCHARS (echo_string) > 1) { Lisp_Object last_char, prev_char, idx; idx = make_number (SCHARS (echo_string) - 2); prev_char = Faref (echo_string, idx); idx = make_number (SCHARS (echo_string) - 1); last_char = Faref (echo_string, idx); /* We test PREV_CHAR to make sure this isn't the echoing of a minus-sign. */ if (XINT (last_char) == '-' && XINT (prev_char) != ' ') Faset (echo_string, idx, make_number (' ')); else echo_string = concat2 (echo_string, build_string (" ")); } else if (STRINGP (echo_string)) echo_string = concat2 (echo_string, build_string (" ")); current_kboard->echo_string = concat2 (echo_string, make_string (buffer, ptr - buffer)); echo_now (); } } /* Temporarily add a dash to the end of the echo string if it's not empty, so that it serves as a mini-prompt for the very next character. */ void echo_dash () { /* Do nothing if not echoing at all. */ if (NILP (current_kboard->echo_string)) return; if (!current_kboard->immediate_echo && SCHARS (current_kboard->echo_string) == 0) return; /* Do nothing if we just printed a prompt. */ if (current_kboard->echo_after_prompt == SCHARS (current_kboard->echo_string)) return; /* Do nothing if we have already put a dash at the end. */ if (SCHARS (current_kboard->echo_string) > 1) { Lisp_Object last_char, prev_char, idx; idx = make_number (SCHARS (current_kboard->echo_string) - 2); prev_char = Faref (current_kboard->echo_string, idx); idx = make_number (SCHARS (current_kboard->echo_string) - 1); last_char = Faref (current_kboard->echo_string, idx); if (XINT (last_char) == '-' && XINT (prev_char) != ' ') return; } /* Put a dash at the end of the buffer temporarily, but make it go away when the next character is added. */ current_kboard->echo_string = concat2 (current_kboard->echo_string, build_string ("-")); echo_now (); } /* Display the current echo string, and begin echoing if not already doing so. */ void echo_now () { if (!current_kboard->immediate_echo) { int i; current_kboard->immediate_echo = 1; for (i = 0; i < this_command_key_count; i++) { Lisp_Object c; /* Set before_command_echo_length to the value that would have been saved before the start of this subcommand in command_loop_1, if we had already been echoing then. */ if (i == this_single_command_key_start) before_command_echo_length = echo_length (); c = XVECTOR (this_command_keys)->contents[i]; if (! (EVENT_HAS_PARAMETERS (c) && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement))) echo_char (c); } /* Set before_command_echo_length to the value that would have been saved before the start of this subcommand in command_loop_1, if we had already been echoing then. */ if (this_command_key_count == this_single_command_key_start) before_command_echo_length = echo_length (); /* Put a dash at the end to invite the user to type more. */ echo_dash (); } echoing = 1; message3_nolog (current_kboard->echo_string, SBYTES (current_kboard->echo_string), STRING_MULTIBYTE (current_kboard->echo_string)); echoing = 0; /* Record in what buffer we echoed, and from which kboard. */ echo_message_buffer = echo_area_buffer[0]; echo_kboard = current_kboard; if (waiting_for_input && !NILP (Vquit_flag)) quit_throw_to_read_char (); } /* Turn off echoing, for the start of a new command. */ void cancel_echoing () { current_kboard->immediate_echo = 0; current_kboard->echo_after_prompt = -1; current_kboard->echo_string = Qnil; ok_to_echo_at_next_pause = NULL; echo_kboard = NULL; echo_message_buffer = Qnil; } /* Return the length of the current echo string. */ static int echo_length () { return (STRINGP (current_kboard->echo_string) ? SCHARS (current_kboard->echo_string) : 0); } /* Truncate the current echo message to its first LEN chars. This and echo_char get used by read_key_sequence when the user switches frames while entering a key sequence. */ static void echo_truncate (nchars) int nchars; { if (STRINGP (current_kboard->echo_string)) current_kboard->echo_string = Fsubstring (current_kboard->echo_string, make_number (0), make_number (nchars)); truncate_echo_area (nchars); } /* Functions for manipulating this_command_keys. */ static void add_command_key (key) Lisp_Object key; { #if 0 /* Not needed after we made Freset_this_command_lengths do the job immediately. */ /* If reset-this-command-length was called recently, obey it now. See the doc string of that function for an explanation of why. */ if (before_command_restore_flag) { this_command_key_count = before_command_key_count_1; if (this_command_key_count < this_single_command_key_start) this_single_command_key_start = this_command_key_count; echo_truncate (before_command_echo_length_1); before_command_restore_flag = 0; } #endif if (this_command_key_count >= ASIZE (this_command_keys)) this_command_keys = larger_vector (this_command_keys, 2 * ASIZE (this_command_keys), Qnil); AREF (this_command_keys, this_command_key_count) = key; ++this_command_key_count; } Lisp_Object recursive_edit_1 () { int count = SPECPDL_INDEX (); Lisp_Object val; if (command_loop_level > 0) { specbind (Qstandard_output, Qt); specbind (Qstandard_input, Qt); } #ifdef HAVE_X_WINDOWS /* The command loop has started an hourglass timer, so we have to cancel it here, otherwise it will fire because the recursive edit can take some time. Do not check for display_hourglass_p here, because it could already be nil. */ cancel_hourglass (); #endif /* This function may have been called from a debugger called from within redisplay, for instance by Edebugging a function called from fontification-functions. We want to allow redisplay in the debugging session. The recursive edit is left with a `(throw exit ...)'. The `exit' tag is not caught anywhere in redisplay, i.e. when we leave the recursive edit, the original redisplay leading to the recursive edit will be unwound. The outcome should therefore be safe. */ specbind (Qinhibit_redisplay, Qnil); redisplaying_p = 0; val = command_loop (); if (EQ (val, Qt)) Fsignal (Qquit, Qnil); /* Handle throw from read_minibuf when using minibuffer while it's active but we're in another window. */ if (STRINGP (val)) xsignal1 (Qerror, val); return unbind_to (count, Qnil); } /* When an auto-save happens, record the "time", and don't do again soon. */ void record_auto_save () { last_auto_save = num_nonmacro_input_events; } /* Make an auto save happen as soon as possible at command level. */ void force_auto_save_soon () { last_auto_save = - auto_save_interval - 1; record_asynch_buffer_change (); } DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", doc: /* Invoke the editor command loop recursively. To get out of the recursive edit, a command can do `(throw 'exit nil)'; that tells this function to return. Alternatively, `(throw 'exit t)' makes this function signal an error. This function is called by the editor initialization to begin editing. */) () { int count = SPECPDL_INDEX (); Lisp_Object buffer; /* If we enter while input is blocked, don't lock up here. This may happen through the debugger during redisplay. */ if (INPUT_BLOCKED_P) return Qnil; command_loop_level++; update_mode_lines = 1; if (command_loop_level && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) buffer = Fcurrent_buffer (); else buffer = Qnil; /* If we leave recursive_edit_1 below with a `throw' for instance, like it is done in the splash screen display, we have to make sure that we restore single_kboard as command_loop_1 would have done if it were left normally. */ record_unwind_protect (recursive_edit_unwind, Fcons (buffer, single_kboard ? Qt : Qnil)); recursive_edit_1 (); return unbind_to (count, Qnil); } Lisp_Object recursive_edit_unwind (info) Lisp_Object info; { if (BUFFERP (XCAR (info))) Fset_buffer (XCAR (info)); if (NILP (XCDR (info))) any_kboard_state (); else single_kboard_state (); command_loop_level--; update_mode_lines = 1; return Qnil; } static void any_kboard_state () { #ifdef MULTI_KBOARD #if 0 /* Theory: if there's anything in Vunread_command_events, it will right away be read by read_key_sequence, and then if we do switch KBOARDS, it will go into the side queue then. So we don't need to do anything special here -- rms. */ if (CONSP (Vunread_command_events)) { current_kboard->kbd_queue = nconc2 (Vunread_command_events, current_kboard->kbd_queue); current_kboard->kbd_queue_has_data = 1; } Vunread_command_events = Qnil; #endif single_kboard = 0; #endif } /* Switch to the single-kboard state, making current_kboard the only KBOARD from which further input is accepted. */ void single_kboard_state () { #ifdef MULTI_KBOARD single_kboard = 1; #endif } /* If we're in single_kboard state for kboard KBOARD, get out of it. */ void not_single_kboard_state (kboard) KBOARD *kboard; { #ifdef MULTI_KBOARD if (kboard == current_kboard) single_kboard = 0; #endif } /* Maintain a stack of kboards, so other parts of Emacs can switch temporarily to the kboard of a given frame and then revert to the previous status. */ struct kboard_stack { KBOARD *kboard; struct kboard_stack *next; }; static struct kboard_stack *kboard_stack; void push_frame_kboard (f) FRAME_PTR f; { #ifdef MULTI_KBOARD struct kboard_stack *p = (struct kboard_stack *) xmalloc (sizeof (struct kboard_stack)); p->next = kboard_stack; p->kboard = current_kboard; kboard_stack = p; current_kboard = FRAME_KBOARD (f); #endif } void pop_frame_kboard () { #ifdef MULTI_KBOARD struct kboard_stack *p = kboard_stack; current_kboard = p->kboard; kboard_stack = p->next; xfree (p); #endif } /* Handle errors that are not handled at inner levels by printing an error message and returning to the editor command loop. */ Lisp_Object cmd_error (data) Lisp_Object data; { Lisp_Object old_level, old_length; char macroerror[50]; #ifdef HAVE_X_WINDOWS if (display_hourglass_p) cancel_hourglass (); #endif if (!NILP (executing_kbd_macro)) { if (executing_kbd_macro_iterations == 1) sprintf (macroerror, "After 1 kbd macro iteration: "); else sprintf (macroerror, "After %d kbd macro iterations: ", executing_kbd_macro_iterations); } else *macroerror = 0; Vstandard_output = Qt; Vstandard_input = Qt; Vexecuting_kbd_macro = Qnil; executing_kbd_macro = Qnil; current_kboard->Vprefix_arg = Qnil; current_kboard->Vlast_prefix_arg = Qnil; cancel_echoing (); /* Avoid unquittable loop if data contains a circular list. */ old_level = Vprint_level; old_length = Vprint_length; XSETFASTINT (Vprint_level, 10); XSETFASTINT (Vprint_length, 10); cmd_error_internal (data, macroerror); Vprint_level = old_level; Vprint_length = old_length; Vquit_flag = Qnil; Vinhibit_quit = Qnil; #ifdef MULTI_KBOARD if (command_loop_level == 0 && minibuf_level == 0) any_kboard_state (); #endif return make_number (0); } /* Take actions on handling an error. DATA is the data that describes the error. CONTEXT is a C-string containing ASCII characters only which describes the context in which the error happened. If we need to generalize CONTEXT to allow multibyte characters, make it a Lisp string. */ void cmd_error_internal (data, context) Lisp_Object data; char *context; { struct frame *sf = SELECTED_FRAME (); /* The immediate context is not interesting for Quits, since they are asyncronous. */ if (EQ (XCAR (data), Qquit)) Vsignaling_function = Qnil; Vquit_flag = Qnil; Vinhibit_quit = Qt; /* Use user's specified output function if any. */ if (!NILP (Vcommand_error_function)) call3 (Vcommand_error_function, data, build_string (context ? context : ""), Vsignaling_function); /* If the window system or terminal frame hasn't been initialized yet, or we're not interactive, write the message to stderr and exit. */ else if (!sf->glyphs_initialized_p /* This is the case of the frame dumped with Emacs, when we're running under a window system. */ || (!NILP (Vwindow_system) && !inhibit_window_system && FRAME_TERMCAP_P (sf)) || noninteractive) { print_error_message (data, Qexternal_debugging_output, context, Vsignaling_function); Fterpri (Qexternal_debugging_output); Fkill_emacs (make_number (-1)); } else { clear_message (1, 0); Fdiscard_input (); message_log_maybe_newline (); bitch_at_user (); print_error_message (data, Qt, context, Vsignaling_function); } Vsignaling_function = Qnil; } Lisp_Object command_loop_1 (); Lisp_Object command_loop_2 (); Lisp_Object top_level_1 (); /* Entry to editor-command-loop. This level has the catches for exiting/returning to editor command loop. It returns nil to exit recursive edit, t to abort it. */ Lisp_Object command_loop () { if (command_loop_level > 0 || minibuf_level > 0) { Lisp_Object val; val = internal_catch (Qexit, command_loop_2, Qnil); executing_kbd_macro = Qnil; return val; } else while (1) { internal_catch (Qtop_level, top_level_1, Qnil); /* Reset single_kboard in case top-level set it while evaluating an -f option, or we are stuck there for some other reason. */ any_kboard_state (); internal_catch (Qtop_level, command_loop_2, Qnil); executing_kbd_macro = Qnil; /* End of file in -batch run causes exit here. */ if (noninteractive) Fkill_emacs (Qt); } } /* Here we catch errors in execution of commands within the editing loop, and reenter the editing loop. When there is an error, cmd_error runs and returns a non-nil value to us. A value of nil means that command_loop_1 itself returned due to end of file (or end of kbd macro). */ Lisp_Object command_loop_2 () { register Lisp_Object val; do val = internal_condition_case (command_loop_1, Qerror, cmd_error); while (!NILP (val)); return Qnil; } Lisp_Object top_level_2 () { return Feval (Vtop_level); } Lisp_Object top_level_1 () { /* On entry to the outer level, run the startup file */ if (!NILP (Vtop_level)) internal_condition_case (top_level_2, Qerror, cmd_error); else if (!NILP (Vpurify_flag)) message ("Bare impure Emacs (standard Lisp code not loaded)"); else message ("Bare Emacs (standard Lisp code not loaded)"); return Qnil; } DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", doc: /* Exit all recursive editing levels. */) () { #ifdef HAVE_X_WINDOWS if (display_hourglass_p) cancel_hourglass (); #endif /* Unblock input if we enter with input blocked. This may happen if redisplay traps e.g. during tool-bar update with input blocked. */ while (INPUT_BLOCKED_P) UNBLOCK_INPUT; return Fthrow (Qtop_level, Qnil); } DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", doc: /* Exit from the innermost recursive edit or minibuffer. */) () { if (command_loop_level > 0 || minibuf_level > 0) Fthrow (Qexit, Qnil); error ("No recursive edit is in progress"); return Qnil; } DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", doc: /* Abort the command that requested this recursive edit or minibuffer input. */) () { if (command_loop_level > 0 || minibuf_level > 0) Fthrow (Qexit, Qt); error ("No recursive edit is in progress"); return Qnil; } #ifdef HAVE_MOUSE /* Restore mouse tracking enablement. See Ftrack_mouse for the only use of this function. */ static Lisp_Object tracking_off (old_value) Lisp_Object old_value; { do_mouse_tracking = old_value; if (NILP (old_value)) { /* Redisplay may have been preempted because there was input available, and it assumes it will be called again after the input has been processed. If the only input available was the sort that we have just disabled, then we need to call redisplay. */ if (!readable_events (READABLE_EVENTS_DO_TIMERS_NOW)) { redisplay_preserve_echo_area (6); get_input_pending (&input_pending, READABLE_EVENTS_DO_TIMERS_NOW); } } return Qnil; } DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, doc: /* Evaluate BODY with mouse movement events enabled. Within a `track-mouse' form, mouse motion generates input events that you can read with `read-event'. Normally, mouse motion is ignored. usage: (track-mouse BODY...) */) (args) Lisp_Object args; { int count = SPECPDL_INDEX (); Lisp_Object val; record_unwind_protect (tracking_off, do_mouse_tracking); do_mouse_tracking = Qt; val = Fprogn (args); return unbind_to (count, val); } /* If mouse has moved on some frame, return one of those frames. Return 0 otherwise. If ignore_mouse_drag_p is non-zero, ignore (implicit) mouse movement after resizing the tool-bar window. */ int ignore_mouse_drag_p; static FRAME_PTR some_mouse_moved () { Lisp_Object tail, frame; if (ignore_mouse_drag_p) { /* ignore_mouse_drag_p = 0; */ return 0; } FOR_EACH_FRAME (tail, frame) { if (XFRAME (frame)->mouse_moved) return XFRAME (frame); } return 0; } #endif /* HAVE_MOUSE */ /* This is the actual command reading loop, sans error-handling encapsulation. */ static int read_key_sequence P_ ((Lisp_Object *, int, Lisp_Object, int, int, int)); void safe_run_hooks P_ ((Lisp_Object)); static void adjust_point_for_property P_ ((int, int)); /* Cancel hourglass from protect_unwind. ARG is not used. */ #ifdef HAVE_X_WINDOWS static Lisp_Object cancel_hourglass_unwind (arg) Lisp_Object arg; { cancel_hourglass (); return Qnil; } #endif Lisp_Object command_loop_1 () { Lisp_Object cmd; int lose; int nonundocount; Lisp_Object keybuf[30]; int i; int no_direct; int prev_modiff = 0; struct buffer *prev_buffer = NULL; #ifdef MULTI_KBOARD int was_locked = single_kboard; #endif int already_adjusted; current_kboard->Vprefix_arg = Qnil; current_kboard->Vlast_prefix_arg = Qnil; Vdeactivate_mark = Qnil; waiting_for_input = 0; cancel_echoing (); nonundocount = 0; this_command_key_count = 0; this_command_key_count_reset = 0; this_single_command_key_start = 0; if (NILP (Vmemory_full)) { /* Make sure this hook runs after commands that get errors and throw to top level. */ /* Note that the value cell will never directly contain nil if the symbol is a local variable. */ if (!NILP (Vpost_command_hook) && !NILP (Vrun_hooks)) safe_run_hooks (Qpost_command_hook); /* If displaying a message, resize the echo area window to fit that message's size exactly. */ if (!NILP (echo_area_buffer[0])) resize_echo_area_exactly (); if (!NILP (Vdeferred_action_list)) safe_run_hooks (Qdeferred_action_function); } /* Do this after running Vpost_command_hook, for consistency. */ current_kboard->Vlast_command = Vthis_command; current_kboard->Vreal_last_command = real_this_command; if (!CONSP (last_command_char)) current_kboard->Vlast_repeatable_command = real_this_command; while (1) { if (! FRAME_LIVE_P (XFRAME (selected_frame))) Fkill_emacs (Qnil); /* Make sure the current window's buffer is selected. */ if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); /* Display any malloc warning that just came out. Use while because displaying one warning can cause another. */ while (pending_malloc_warning) display_malloc_warning (); no_direct = 0; Vdeactivate_mark = Qnil; /* If minibuffer on and echo area in use, wait a short time and redraw minibuffer. */ if (minibuf_level && !NILP (echo_area_buffer[0]) && EQ (minibuf_window, echo_area_window) && NUMBERP (Vminibuffer_message_timeout)) { /* Bind inhibit-quit to t so that C-g gets read in rather than quitting back to the minibuffer. */ int count = SPECPDL_INDEX (); specbind (Qinhibit_quit, Qt); sit_for (Vminibuffer_message_timeout, 0, 2); /* Clear the echo area. */ message2 (0, 0, 0); safe_run_hooks (Qecho_area_clear_hook); unbind_to (count, Qnil); /* If a C-g came in before, treat it as input now. */ if (!NILP (Vquit_flag)) { Vquit_flag = Qnil; Vunread_command_events = Fcons (make_number (quit_char), Qnil); } } #ifdef C_ALLOCA alloca (0); /* Cause a garbage collection now */ /* Since we can free the most stuff here. */ #endif /* C_ALLOCA */ #if 0 /* Select the frame that the last event came from. Usually, switch-frame events will take care of this, but if some lisp code swallows a switch-frame event, we'll fix things up here. Is this a good idea? */ if (FRAMEP (internal_last_event_frame) && !EQ (internal_last_event_frame, selected_frame)) Fselect_frame (internal_last_event_frame); #endif /* If it has changed current-menubar from previous value, really recompute the menubar from the value. */ if (! NILP (Vlucid_menu_bar_dirty_flag) && !NILP (Ffboundp (Qrecompute_lucid_menubar))) call0 (Qrecompute_lucid_menubar); before_command_key_count = this_command_key_count; before_command_echo_length = echo_length (); Vthis_command = Qnil; real_this_command = Qnil; Vthis_original_command = Qnil; /* Read next key sequence; i gets its length. */ i = read_key_sequence (keybuf, sizeof keybuf / sizeof keybuf[0], Qnil, 0, 1, 1); /* A filter may have run while we were reading the input. */ if (! FRAME_LIVE_P (XFRAME (selected_frame))) Fkill_emacs (Qnil); if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); ++num_input_keys; /* Now we have read a key sequence of length I, or else I is 0 and we found end of file. */ if (i == 0) /* End of file -- happens only in */ return Qnil; /* a kbd macro, at the end. */ /* -1 means read_key_sequence got a menu that was rejected. Just loop around and read another command. */ if (i == -1) { cancel_echoing (); this_command_key_count = 0; this_command_key_count_reset = 0; this_single_command_key_start = 0; goto finalize; } last_command_char = keybuf[i - 1]; /* If the previous command tried to force a specific window-start, forget about that, in case this command moves point far away from that position. But also throw away beg_unchanged and end_unchanged information in that case, so that redisplay will update the whole window properly. */ if (!NILP (XWINDOW (selected_window)->force_start)) { struct buffer *b; XWINDOW (selected_window)->force_start = Qnil; b = XBUFFER (XWINDOW (selected_window)->buffer); BUF_BEG_UNCHANGED (b) = BUF_END_UNCHANGED (b) = 0; } cmd = read_key_sequence_cmd; if (!NILP (Vexecuting_kbd_macro)) { if (!NILP (Vquit_flag)) { Vexecuting_kbd_macro = Qt; QUIT; /* Make some noise. */ /* Will return since macro now empty. */ } } /* Do redisplay processing after this command except in special cases identified below. */ prev_buffer = current_buffer; prev_modiff = MODIFF; last_point_position = PT; last_point_position_window = selected_window; XSETBUFFER (last_point_position_buffer, prev_buffer); /* By default, we adjust point to a boundary of a region that has such a property that should be treated intangible (e.g. composition, display). But, some commands will set this variable differently. */ Vdisable_point_adjustment = Qnil; /* Process filters and timers may have messed with deactivate-mark. reset it before we execute the command. */ Vdeactivate_mark = Qnil; /* Remap command through active keymaps */ Vthis_original_command = cmd; if (SYMBOLP (cmd)) { Lisp_Object cmd1; if (cmd1 = Fcommand_remapping (cmd, Qnil, Qnil), !NILP (cmd1)) cmd = cmd1; } /* Execute the command. */ Vthis_command = cmd; real_this_command = cmd; /* Note that the value cell will never directly contain nil if the symbol is a local variable. */ if (!NILP (Vpre_command_hook) && !NILP (Vrun_hooks)) safe_run_hooks (Qpre_command_hook); already_adjusted = 0; if (NILP (Vthis_command)) { /* nil means key is undefined. */ Lisp_Object keys = Fvector (i, keybuf); keys = Fkey_description (keys, Qnil); bitch_at_user (); message_with_string ("%s is undefined", keys, 0); current_kboard->defining_kbd_macro = Qnil; update_mode_lines = 1; current_kboard->Vprefix_arg = Qnil; } else { if (NILP (current_kboard->Vprefix_arg) && ! no_direct) { /* In case we jump to directly_done. */ Vcurrent_prefix_arg = current_kboard->Vprefix_arg; /* Recognize some common commands in common situations and do them directly. */ if (EQ (Vthis_command, Qforward_char) && PT < ZV) { struct Lisp_Char_Table *dp = window_display_table (XWINDOW (selected_window)); lose = FETCH_CHAR (PT_BYTE); SET_PT (PT + 1); if (! NILP (Vpost_command_hook)) /* Put this before calling adjust_point_for_property so it will only get called once in any case. */ goto directly_done; if (current_buffer == prev_buffer && last_point_position != PT && NILP (Vdisable_point_adjustment) && NILP (Vglobal_disable_point_adjustment)) adjust_point_for_property (last_point_position, 0); already_adjusted = 1; if (PT == last_point_position + 1 && (dp ? (VECTORP (DISP_CHAR_VECTOR (dp, lose)) ? XVECTOR (DISP_CHAR_VECTOR (dp, lose))->size == 1 : (NILP (DISP_CHAR_VECTOR (dp, lose)) && (lose >= 0x20 && lose < 0x7f))) : (lose >= 0x20 && lose < 0x7f)) /* To extract the case of continuation on wide-column characters. */ && (WIDTH_BY_CHAR_HEAD (FETCH_BYTE (PT_BYTE)) == 1) && (XFASTINT (XWINDOW (selected_window)->last_modified) >= MODIFF) && (XFASTINT (XWINDOW (selected_window)->last_overlay_modified) >= OVERLAY_MODIFF) && (XFASTINT (XWINDOW (selected_window)->last_point) == PT - 1) && !windows_or_buffers_changed && EQ (current_buffer->selective_display, Qnil) && !detect_input_pending () && NILP (XWINDOW (selected_window)->column_number_displayed) && NILP (Vexecuting_kbd_macro)) direct_output_forward_char (1); goto directly_done; } else if (EQ (Vthis_command, Qbackward_char) && PT > BEGV) { struct Lisp_Char_Table *dp = window_display_table (XWINDOW (selected_window)); SET_PT (PT - 1); lose = FETCH_CHAR (PT_BYTE); if (! NILP (Vpost_command_hook)) goto directly_done; if (current_buffer == prev_buffer && last_point_position != PT && NILP (Vdisable_point_adjustment) && NILP (Vglobal_disable_point_adjustment)) adjust_point_for_property (last_point_position, 0); already_adjusted = 1; if (PT == last_point_position - 1 && (dp ? (VECTORP (DISP_CHAR_VECTOR (dp, lose)) ? XVECTOR (DISP_CHAR_VECTOR (dp, lose))->size == 1 : (NILP (DISP_CHAR_VECTOR (dp, lose)) && (lose >= 0x20 && lose < 0x7f))) : (lose >= 0x20 && lose < 0x7f)) && (XFASTINT (XWINDOW (selected_window)->last_modified) >= MODIFF) && (XFASTINT (XWINDOW (selected_window)->last_overlay_modified) >= OVERLAY_MODIFF) && (XFASTINT (XWINDOW (selected_window)->last_point) == PT + 1) && !windows_or_buffers_changed && EQ (current_buffer->selective_display, Qnil) && !detect_input_pending () && NILP (XWINDOW (selected_window)->column_number_displayed) && NILP (Vexecuting_kbd_macro)) direct_output_forward_char (-1); goto directly_done; } else if (EQ (Vthis_command, Qself_insert_command) /* Try this optimization only on char keystrokes. */ && NATNUMP (last_command_char) && CHAR_VALID_P (XFASTINT (last_command_char), 0)) { unsigned int c = translate_char (Vtranslation_table_for_input, XFASTINT (last_command_char), 0, 0, 0); int value; if (NILP (Vexecuting_kbd_macro) && !EQ (minibuf_window, selected_window)) { if (!nonundocount || nonundocount >= 20) { Fundo_boundary (); nonundocount = 0; } nonundocount++; } lose = ((XFASTINT (XWINDOW (selected_window)->last_modified) < MODIFF) || (XFASTINT (XWINDOW (selected_window)->last_overlay_modified) < OVERLAY_MODIFF) || (XFASTINT (XWINDOW (selected_window)->last_point) != PT) || MODIFF <= SAVE_MODIFF || windows_or_buffers_changed || !EQ (current_buffer->selective_display, Qnil) || detect_input_pending () || !NILP (XWINDOW (selected_window)->column_number_displayed) || !NILP (Vexecuting_kbd_macro)); value = internal_self_insert (c, 0); if (value == 2) nonundocount = 0; if (! NILP (Vpost_command_hook)) /* Put this before calling adjust_point_for_property so it will only get called once in any case. */ goto directly_done; /* VALUE == 1 when AFTER-CHANGE functions are installed which is the case most of the time because FONT-LOCK installs one. */ if (!lose && !value) direct_output_for_insert (c); goto directly_done; } } /* Here for a command that isn't executed directly */ { #ifdef HAVE_X_WINDOWS int scount = SPECPDL_INDEX (); if (display_hourglass_p && NILP (Vexecuting_kbd_macro)) { record_unwind_protect (cancel_hourglass_unwind, Qnil); start_hourglass (); } #endif nonundocount = 0; if (NILP (current_kboard->Vprefix_arg)) Fundo_boundary (); Fcommand_execute (Vthis_command, Qnil, Qnil, Qnil); #ifdef HAVE_X_WINDOWS /* Do not check display_hourglass_p here, because Fcommand_execute could change it, but we should cancel hourglass cursor anyway. But don't cancel the hourglass within a macro just because a command in the macro finishes. */ if (NILP (Vexecuting_kbd_macro)) unbind_to (scount, Qnil); #endif } } directly_done: ; current_kboard->Vlast_prefix_arg = Vcurrent_prefix_arg; /* Note that the value cell will never directly contain nil if the symbol is a local variable. */ if (!NILP (Vpost_command_hook) && !NILP (Vrun_hooks)) safe_run_hooks (Qpost_command_hook); /* If displaying a message, resize the echo area window to fit that message's size exactly. */ if (!NILP (echo_area_buffer[0])) resize_echo_area_exactly (); if (!NILP (Vdeferred_action_list)) safe_run_hooks (Qdeferred_action_function); /* If there is a prefix argument, 1) We don't want Vlast_command to be ``universal-argument'' (that would be dumb), so don't set Vlast_command, 2) we want to leave echoing on so that the prefix will be echoed as part of this key sequence, so don't call cancel_echoing, and 3) we want to leave this_command_key_count non-zero, so that read_char will realize that it is re-reading a character, and not echo it a second time. If the command didn't actually create a prefix arg, but is merely a frame event that is transparent to prefix args, then the above doesn't apply. */ if (NILP (current_kboard->Vprefix_arg) || CONSP (last_command_char)) { current_kboard->Vlast_command = Vthis_command; current_kboard->Vreal_last_command = real_this_command; if (!CONSP (last_command_char)) current_kboard->Vlast_repeatable_command = real_this_command; cancel_echoing (); this_command_key_count = 0; this_command_key_count_reset = 0; this_single_command_key_start = 0; } if (!NILP (current_buffer->mark_active) && !NILP (Vrun_hooks)) { /* Setting transient-mark-mode to `only' is a way of turning it on for just one command. */ if (EQ (Vtransient_mark_mode, Qidentity)) Vtransient_mark_mode = Qnil; if (EQ (Vtransient_mark_mode, Qonly)) Vtransient_mark_mode = Qidentity; if (!NILP (Vdeactivate_mark) && !NILP (Vtransient_mark_mode)) { /* We could also call `deactivate'mark'. */ if (EQ (Vtransient_mark_mode, Qlambda)) Vtransient_mark_mode = Qnil; else { current_buffer->mark_active = Qnil; call1 (Vrun_hooks, intern ("deactivate-mark-hook")); } } else if (current_buffer != prev_buffer || MODIFF != prev_modiff) call1 (Vrun_hooks, intern ("activate-mark-hook")); } finalize: if (current_buffer == prev_buffer && last_point_position != PT && NILP (Vdisable_point_adjustment) && NILP (Vglobal_disable_point_adjustment) && !already_adjusted) adjust_point_for_property (last_point_position, MODIFF != prev_modiff); /* Install chars successfully executed in kbd macro. */ if (!NILP (current_kboard->defining_kbd_macro) && NILP (current_kboard->Vprefix_arg)) finalize_kbd_macro_chars (); #ifdef MULTI_KBOARD if (!was_locked) any_kboard_state (); #endif } } extern Lisp_Object Qcomposition, Qdisplay; /* Adjust point to a boundary of a region that has such a property that should be treated intangible. For the moment, we check `composition', `display' and `invisible' properties. LAST_PT is the last position of point. */ extern Lisp_Object Qafter_string, Qbefore_string; extern Lisp_Object get_pos_property P_ ((Lisp_Object, Lisp_Object, Lisp_Object)); static void adjust_point_for_property (last_pt, modified) int last_pt; int modified; { int beg, end; Lisp_Object val, overlay, tmp; int check_composition = 1, check_display = 1, check_invisible = 1; int orig_pt = PT; /* FIXME: cycling is probably not necessary because these properties can't be usefully combined anyway. */ while (check_composition || check_display || check_invisible) { if (check_composition && PT > BEGV && PT < ZV && get_property_and_range (PT, Qcomposition, &val, &beg, &end, Qnil) && COMPOSITION_VALID_P (beg, end, val) && beg < PT /* && end > PT <- It's always the case. */ && (last_pt <= beg || last_pt >= end)) { xassert (end > PT); SET_PT (PT < last_pt ? beg : end); check_display = check_invisible = 1; } check_composition = 0; if (check_display && PT > BEGV && PT < ZV && !NILP (val = get_char_property_and_overlay (make_number (PT), Qdisplay, Qnil, &overlay)) && display_prop_intangible_p (val) && (!OVERLAYP (overlay) ? get_property_and_range (PT, Qdisplay, &val, &beg, &end, Qnil) : (beg = OVERLAY_POSITION (OVERLAY_START (overlay)), end = OVERLAY_POSITION (OVERLAY_END (overlay)))) && (beg < PT /* && end > PT <- It's always the case. */ || (beg <= PT && STRINGP (val) && SCHARS (val) == 0))) { xassert (end > PT); SET_PT (PT < last_pt ? (STRINGP (val) && SCHARS (val) == 0 ? beg - 1 : beg) : end); check_composition = check_invisible = 1; } check_display = 0; if (check_invisible && PT > BEGV && PT < ZV) { int inv, ellipsis = 0; beg = end = PT; /* Find boundaries `beg' and `end' of the invisible area, if any. */ while (end < ZV && !NILP (val = get_char_property_and_overlay (make_number (end), Qinvisible, Qnil, &overlay)) && (inv = TEXT_PROP_MEANS_INVISIBLE (val))) { ellipsis = ellipsis || inv > 1 || (OVERLAYP (overlay) && (!NILP (Foverlay_get (overlay, Qafter_string)) || !NILP (Foverlay_get (overlay, Qbefore_string)))); tmp = Fnext_single_char_property_change (make_number (end), Qinvisible, Qnil, Qnil); end = NATNUMP (tmp) ? XFASTINT (tmp) : ZV; } while (beg > BEGV && !NILP (val = get_char_property_and_overlay (make_number (beg - 1), Qinvisible, Qnil, &overlay)) && (inv = TEXT_PROP_MEANS_INVISIBLE (val))) { ellipsis = ellipsis || inv > 1 || (OVERLAYP (overlay) && (!NILP (Foverlay_get (overlay, Qafter_string)) || !NILP (Foverlay_get (overlay, Qbefore_string)))); tmp = Fprevious_single_char_property_change (make_number (beg), Qinvisible, Qnil, Qnil); beg = NATNUMP (tmp) ? XFASTINT (tmp) : BEGV; } /* Move away from the inside area. */ if (beg < PT && end > PT) { SET_PT ((orig_pt == PT && (last_pt < beg || last_pt > end)) /* We haven't moved yet (so we don't need to fear infinite-looping) and we were outside the range before (so either end of the range still corresponds to a move in the right direction): pretend we moved less than we actually did, so that we still have more freedom below in choosing which end of the range to go to. */ ? (orig_pt = -1, PT < last_pt ? end : beg) /* We either have moved already or the last point was already in the range: we don't get to choose which end of the range we have to go to. */ : (PT < last_pt ? beg : end)); check_composition = check_display = 1; } #if 0 /* This assertion isn't correct, because SET_PT may end up setting the point to something other than its argument, due to point-motion hooks, intangibility, etc. */ xassert (PT == beg || PT == end); #endif /* Pretend the area doesn't exist if the buffer is not modified. */ if (!modified && !ellipsis && beg < end) { if (last_pt == beg && PT == end && end < ZV) (check_composition = check_display = 1, SET_PT (end + 1)); else if (last_pt == end && PT == beg && beg > BEGV) (check_composition = check_display = 1, SET_PT (beg - 1)); else if (PT == ((PT < last_pt) ? beg : end)) /* We've already moved as far as we can. Trying to go to the other end would mean moving backwards and thus could lead to an infinite loop. */ ; else if (val = get_pos_property (make_number (PT), Qinvisible, Qnil), TEXT_PROP_MEANS_INVISIBLE (val) && (val = get_pos_property (make_number (PT == beg ? end : beg), Qinvisible, Qnil), !TEXT_PROP_MEANS_INVISIBLE (val))) (check_composition = check_display = 1, SET_PT (PT == beg ? end : beg)); } } check_invisible = 0; } } /* Subroutine for safe_run_hooks: run the hook HOOK. */ static Lisp_Object safe_run_hooks_1 (hook) Lisp_Object hook; { if (NILP (Vrun_hooks)) return Qnil; return call1 (Vrun_hooks, Vinhibit_quit); } /* Subroutine for safe_run_hooks: handle an error by clearing out the hook. */ static Lisp_Object safe_run_hooks_error (data) Lisp_Object data; { Lisp_Object args[3]; args[0] = build_string ("Error in %s: %s"); args[1] = Vinhibit_quit; args[2] = data; Fmessage (3, args); return Fset (Vinhibit_quit, Qnil); } /* If we get an error while running the hook, cause the hook variable to be nil. Also inhibit quits, so that C-g won't cause the hook to mysteriously evaporate. */ void safe_run_hooks (hook) Lisp_Object hook; { int count = SPECPDL_INDEX (); specbind (Qinhibit_quit, hook); internal_condition_case (safe_run_hooks_1, Qt, safe_run_hooks_error); unbind_to (count, Qnil); } /* Number of seconds between polling for input. This is a Lisp variable that can be bound. */ EMACS_INT polling_period; /* Nonzero means polling for input is temporarily suppressed. */ int poll_suppress_count; /* Asynchronous timer for polling. */ struct atimer *poll_timer; #ifdef POLL_FOR_INPUT /* Poll for input, so what we catch a C-g if it comes in. This function is called from x_make_frame_visible, see comment there. */ void poll_for_input_1 () { if (interrupt_input_blocked == 0 && !waiting_for_input) read_avail_input (0); } /* Timer callback function for poll_timer. TIMER is equal to poll_timer. */ void poll_for_input (timer) struct atimer *timer; { if (poll_suppress_count == 0) #ifdef SYNC_INPUT interrupt_input_pending = 1; #else poll_for_input_1 (); #endif } #endif /* POLL_FOR_INPUT */ /* Begin signals to poll for input, if they are appropriate. This function is called unconditionally from various places. */ void start_polling () { #ifdef POLL_FOR_INPUT if (read_socket_hook && !interrupt_input) { /* Turn alarm handling on unconditionally. It might have been turned off in process.c. */ turn_on_atimers (1); /* If poll timer doesn't exist, are we need one with a different interval, start a new one. */ if (poll_timer == NULL || EMACS_SECS (poll_timer->interval) != polling_period) { EMACS_TIME interval; if (poll_timer) cancel_atimer (poll_timer); EMACS_SET_SECS_USECS (interval, polling_period, 0); poll_timer = start_atimer (ATIMER_CONTINUOUS, interval, poll_for_input, NULL); } /* Let the timer's callback function poll for input if this becomes zero. */ --poll_suppress_count; } #endif } /* Nonzero if we are using polling to handle input asynchronously. */ int input_polling_used () { #ifdef POLL_FOR_INPUT return read_socket_hook && !interrupt_input; #else return 0; #endif } /* Turn off polling. */ void stop_polling () { #ifdef POLL_FOR_INPUT if (read_socket_hook && !interrupt_input) ++poll_suppress_count; #endif } /* Set the value of poll_suppress_count to COUNT and start or stop polling accordingly. */ void set_poll_suppress_count (count) int count; { #ifdef POLL_FOR_INPUT if (count == 0 && poll_suppress_count != 0) { poll_suppress_count = 1; start_polling (); } else if (count != 0 && poll_suppress_count == 0) { stop_polling (); } poll_suppress_count = count; #endif } /* Bind polling_period to a value at least N. But don't decrease it. */ void bind_polling_period (n) int n; { #ifdef POLL_FOR_INPUT int new = polling_period; if (n > new) new = n; stop_other_atimers (poll_timer); stop_polling (); specbind (Qpolling_period, make_number (new)); /* Start a new alarm with the new period. */ start_polling (); #endif } /* Apply the control modifier to CHARACTER. */ int make_ctrl_char (c) int c; { /* Save the upper bits here. */ int upper = c & ~0177; if (! ASCII_BYTE_P (c)) return c |= ctrl_modifier; c &= 0177; /* Everything in the columns containing the upper-case letters denotes a control character. */ if (c >= 0100 && c < 0140) { int oc = c; c &= ~0140; /* Set the shift modifier for a control char made from a shifted letter. But only for letters! */ if (oc >= 'A' && oc <= 'Z') c |= shift_modifier; } /* The lower-case letters denote control characters too. */ else if (c >= 'a' && c <= 'z') c &= ~0140; /* Include the bits for control and shift only if the basic ASCII code can't indicate them. */ else if (c >= ' ') c |= ctrl_modifier; /* Replace the high bits. */ c |= (upper & ~ctrl_modifier); return c; } /* Display the help-echo property of the character after the mouse pointer. Either show it in the echo area, or call show-help-function to display it by other means (maybe in a tooltip). If HELP is nil, that means clear the previous help echo. If HELP is a string, display that string. If HELP is a function, call it with OBJECT and POS as arguments; the function should return a help string or nil for none. For all other types of HELP, evaluate it to obtain a string. WINDOW is the window in which the help was generated, if any. It is nil if not in a window. If OBJECT is a buffer, POS is the position in the buffer where the `help-echo' text property was found. If OBJECT is an overlay, that overlay has a `help-echo' property, and POS is the position in the overlay's buffer under the mouse. If OBJECT is a string (an overlay string or a string displayed with the `display' property). POS is the position in that string under the mouse. OK_TO_OVERWRITE_KEYSTROKE_ECHO non-zero means it's okay if the help echo overwrites a keystroke echo currently displayed in the echo area. Note: this function may only be called with HELP nil or a string from X code running asynchronously. */ void show_help_echo (help, window, object, pos, ok_to_overwrite_keystroke_echo) Lisp_Object help, window, object, pos; int ok_to_overwrite_keystroke_echo; { if (!NILP (help) && !STRINGP (help)) { if (FUNCTIONP (help)) { Lisp_Object args[4]; args[0] = help; args[1] = window; args[2] = object; args[3] = pos; help = safe_call (4, args); } else help = safe_eval (help); if (!STRINGP (help)) return; } #ifdef HAVE_MOUSE if (!noninteractive && STRINGP (help)) { /* The mouse-fixup-help-message Lisp function can call mouse_position_hook, which resets the mouse_moved flags. This causes trouble if we are trying to read a mouse motion event (i.e., if we are inside a `track-mouse' form), so we restore the mouse_moved flag. */ FRAME_PTR f = NILP (do_mouse_tracking) ? NULL : some_mouse_moved (); help = call1 (Qmouse_fixup_help_message, help); if (f) f->mouse_moved = 1; } #endif if (STRINGP (help) || NILP (help)) { if (!NILP (Vshow_help_function)) call1 (Vshow_help_function, help); else if (/* Don't overwrite minibuffer contents. */ !MINI_WINDOW_P (XWINDOW (selected_window)) /* Don't overwrite a keystroke echo. */ && (NILP (echo_message_buffer) || ok_to_overwrite_keystroke_echo) /* Don't overwrite a prompt. */ && !cursor_in_echo_area) { if (STRINGP (help)) { int count = SPECPDL_INDEX (); if (!help_echo_showing_p) Vpre_help_message = current_message (); specbind (Qmessage_truncate_lines, Qt); message3_nolog (help, SBYTES (help), STRING_MULTIBYTE (help)); unbind_to (count, Qnil); } else if (STRINGP (Vpre_help_message)) { message3_nolog (Vpre_help_message, SBYTES (Vpre_help_message), STRING_MULTIBYTE (Vpre_help_message)); Vpre_help_message = Qnil; } else message (0); } help_echo_showing_p = STRINGP (help); } } /* Input of single characters from keyboard */ Lisp_Object print_help (); static Lisp_Object kbd_buffer_get_event (); static void record_char (); static Lisp_Object help_form_saved_window_configs; static Lisp_Object read_char_help_form_unwind (arg) { Lisp_Object window_config = XCAR (help_form_saved_window_configs); help_form_saved_window_configs = XCDR (help_form_saved_window_configs); if (!NILP (window_config)) Fset_window_configuration (window_config); return Qnil; } #ifdef MULTI_KBOARD static jmp_buf wrong_kboard_jmpbuf; #endif #define STOP_POLLING \ do { if (! polling_stopped_here) stop_polling (); \ polling_stopped_here = 1; } while (0) #define RESUME_POLLING \ do { if (polling_stopped_here) start_polling (); \ polling_stopped_here = 0; } while (0) /* read a character from the keyboard; call the redisplay if needed */ /* commandflag 0 means do not do auto-saving, but do do redisplay. -1 means do not do redisplay, but do do autosaving. 1 means do both. */ /* The arguments MAPS and NMAPS are for menu prompting. MAPS is an array of keymaps; NMAPS is the length of MAPS. PREV_EVENT is the previous input event, or nil if we are reading the first event of a key sequence (or not reading a key sequence). If PREV_EVENT is t, that is a "magic" value that says not to run input methods, but in other respects to act as if not reading a key sequence. If USED_MOUSE_MENU is non-null, then we set *USED_MOUSE_MENU to 1 if we used a mouse menu to read the input, or zero otherwise. If USED_MOUSE_MENU is null, we don't dereference it. If END_TIME is non-null, it is a pointer to an EMACS_TIME specifying the maximum time to wait until. If no input arrives by that time, stop waiting and return nil. Value is t if we showed a menu and the user rejected it. */ Lisp_Object read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu, end_time) int commandflag; int nmaps; Lisp_Object *maps; Lisp_Object prev_event; int *used_mouse_menu; EMACS_TIME *end_time; { volatile Lisp_Object c; int count, jmpcount; jmp_buf local_getcjmp; jmp_buf save_jump; volatile int key_already_recorded = 0; Lisp_Object tem, save; volatile Lisp_Object previous_echo_area_message; volatile Lisp_Object also_record; volatile int reread; struct gcpro gcpro1, gcpro2; int polling_stopped_here = 0; also_record = Qnil; #if 0 /* This was commented out as part of fixing echo for C-u left. */ before_command_key_count = this_command_key_count; before_command_echo_length = echo_length (); #endif c = Qnil; previous_echo_area_message = Qnil; GCPRO2 (c, previous_echo_area_message); retry: reread = 0; if (CONSP (Vunread_post_input_method_events)) { c = XCAR (Vunread_post_input_method_events); Vunread_post_input_method_events = XCDR (Vunread_post_input_method_events); /* Undo what read_char_x_menu_prompt did when it unread additional keys returned by Fx_popup_menu. */ if (CONSP (c) && (SYMBOLP (XCAR (c)) || INTEGERP (XCAR (c))) && NILP (XCDR (c))) c = XCAR (c); reread = 1; goto reread_first; } if (unread_command_char != -1) { XSETINT (c, unread_command_char); unread_command_char = -1; reread = 1; goto reread_first; } if (CONSP (Vunread_command_events)) { c = XCAR (Vunread_command_events); Vunread_command_events = XCDR (Vunread_command_events); reread = 1; /* Undo what sit-for did when it unread additional keys inside universal-argument. */ if (CONSP (c) && EQ (XCAR (c), Qt)) { reread = 0; c = XCDR (c); } /* Undo what read_char_x_menu_prompt did when it unread additional keys returned by Fx_popup_menu. */ if (CONSP (c) && EQ (XCDR (c), Qdisabled) && (SYMBOLP (XCAR (c)) || INTEGERP (XCAR (c)))) c = XCAR (c); /* If the queued event is something that used the mouse, set used_mouse_menu accordingly. */ if (used_mouse_menu && (EQ (c, Qtool_bar) || EQ (c, Qmenu_bar))) *used_mouse_menu = 1; goto reread_for_input_method; } if (CONSP (Vunread_input_method_events)) { c = XCAR (Vunread_input_method_events); Vunread_input_method_events = XCDR (Vunread_input_method_events); /* Undo what read_char_x_menu_prompt did when it unread additional keys returned by Fx_popup_menu. */ if (CONSP (c) && (SYMBOLP (XCAR (c)) || INTEGERP (XCAR (c))) && NILP (XCDR (c))) c = XCAR (c); reread = 1; goto reread_for_input_method; } this_command_key_count_reset = 0; if (!NILP (Vexecuting_kbd_macro)) { /* We set this to Qmacro; since that's not a frame, nobody will try to switch frames on us, and the selected window will remain unchanged. Since this event came from a macro, it would be misleading to leave internal_last_event_frame set to wherever the last real event came from. Normally, a switch-frame event selects internal_last_event_frame after each command is read, but events read from a macro should never cause a new frame to be selected. */ Vlast_event_frame = internal_last_event_frame = Qmacro; /* Exit the macro if we are at the end. Also, some things replace the macro with t to force an early exit. */ if (EQ (Vexecuting_kbd_macro, Qt) || executing_kbd_macro_index >= XFASTINT (Flength (Vexecuting_kbd_macro))) { XSETINT (c, -1); goto exit; } c = Faref (Vexecuting_kbd_macro, make_number (executing_kbd_macro_index)); if (STRINGP (Vexecuting_kbd_macro) && (XINT (c) & 0x80) && (XUINT (c) <= 0xff)) XSETFASTINT (c, CHAR_META | (XINT (c) & ~0x80)); executing_kbd_macro_index++; goto from_macro; } if (!NILP (unread_switch_frame)) { c = unread_switch_frame; unread_switch_frame = Qnil; /* This event should make it into this_command_keys, and get echoed again, so we do not set `reread'. */ goto reread_first; } /* if redisplay was requested */ if (commandflag >= 0) { /* If there is pending input, process any events which are not user-visible, such as X selection_request events. */ if (input_pending || detect_input_pending_run_timers (0)) swallow_events (0); /* may clear input_pending */ /* Redisplay if no pending input. */ while (!input_pending) { if (help_echo_showing_p && !EQ (selected_window, minibuf_window)) redisplay_preserve_echo_area (5); else redisplay (); if (!input_pending) /* Normal case: no input arrived during redisplay. */ break; /* Input arrived and pre-empted redisplay. Process any events which are not user-visible. */ swallow_events (0); /* If that cleared input_pending, try again to redisplay. */ } } /* Message turns off echoing unless more keystrokes turn it on again. The code in 20.x for the condition was 1. echo_area_glyphs && *echo_area_glyphs 2. && echo_area_glyphs != current_kboard->echobuf 3. && ok_to_echo_at_next_pause != echo_area_glyphs (1) means there's a current message displayed (2) means it's not the message from echoing from the current kboard. (3) There's only one place in 20.x where ok_to_echo_at_next_pause is set to a non-null value. This is done in read_char and it is set to echo_area_glyphs after a call to echo_char. That means ok_to_echo_at_next_pause is either null or current_kboard->echobuf with the appropriate current_kboard at that time. So, condition (3) means in clear text ok_to_echo_at_next_pause must be either null, or the current message isn't from echoing at all, or it's from echoing from a different kboard than the current one. */ if (/* There currently is something in the echo area. */ !NILP (echo_area_buffer[0]) && (/* And it's either not from echoing. */ !EQ (echo_area_buffer[0], echo_message_buffer) /* Or it's an echo from a different kboard. */ || echo_kboard != current_kboard /* Or we explicitly allow overwriting whatever there is. */ || ok_to_echo_at_next_pause == NULL)) cancel_echoing (); else echo_dash (); /* Try reading a character via menu prompting in the minibuf. Try this before the sit-for, because the sit-for would do the wrong thing if we are supposed to do menu prompting. If EVENT_HAS_PARAMETERS then we are reading after a mouse event so don't try a minibuf menu. */ c = Qnil; if (nmaps > 0 && INTERACTIVE && !NILP (prev_event) && ! EVENT_HAS_PARAMETERS (prev_event) /* Don't bring up a menu if we already have another event. */ && NILP (Vunread_command_events) && unread_command_char < 0 && !detect_input_pending_run_timers (0)) { c = read_char_minibuf_menu_prompt (commandflag, nmaps, maps); if (! NILP (c)) { key_already_recorded = 1; goto non_reread_1; } } /* Make a longjmp point for quits to use, but don't alter getcjmp just yet. We will do that below, temporarily for short sections of code, when appropriate. local_getcjmp must be in effect around any call to sit_for or kbd_buffer_get_event; it *must not* be in effect when we call redisplay. */ jmpcount = SPECPDL_INDEX (); if (_setjmp (local_getcjmp)) { /* We must have saved the outer value of getcjmp here, so restore it now. */ restore_getcjmp (save_jump); unbind_to (jmpcount, Qnil); XSETINT (c, quit_char); internal_last_event_frame = selected_frame; Vlast_event_frame = internal_last_event_frame; /* If we report the quit char as an event, don't do so more than once. */ if (!NILP (Vinhibit_quit)) Vquit_flag = Qnil; #ifdef MULTI_KBOARD { KBOARD *kb = FRAME_KBOARD (XFRAME (selected_frame)); if (kb != current_kboard) { Lisp_Object link = kb->kbd_queue; /* We shouldn't get here if we were in single-kboard mode! */ if (single_kboard) abort (); if (CONSP (link)) { while (CONSP (XCDR (link))) link = XCDR (link); if (!NILP (XCDR (link))) abort (); } if (!CONSP (link)) kb->kbd_queue = Fcons (c, Qnil); else XSETCDR (link, Fcons (c, Qnil)); kb->kbd_queue_has_data = 1; current_kboard = kb; /* This is going to exit from read_char so we had better get rid of this frame's stuff. */ UNGCPRO; longjmp (wrong_kboard_jmpbuf, 1); } } #endif goto non_reread; } /* Start idle timers if no time limit is supplied. We don't do it if a time limit is supplied to avoid an infinite recursion in the situation where an idle timer calls `sit-for'. */ if (!end_time) timer_start_idle (); /* If in middle of key sequence and minibuffer not active, start echoing if enough time elapses. */ if (minibuf_level == 0 && !end_time && !current_kboard->immediate_echo && this_command_key_count > 0 && ! noninteractive && (FLOATP (Vecho_keystrokes) || INTEGERP (Vecho_keystrokes)) && NILP (Fzerop (Vecho_keystrokes)) && (/* No message. */ NILP (echo_area_buffer[0]) /* Or empty message. */ || (BUF_BEG (XBUFFER (echo_area_buffer[0])) == BUF_Z (XBUFFER (echo_area_buffer[0]))) /* Or already echoing from same kboard. */ || (echo_kboard && ok_to_echo_at_next_pause == echo_kboard) /* Or not echoing before and echoing allowed. */ || (!echo_kboard && ok_to_echo_at_next_pause))) { /* After a mouse event, start echoing right away. This is because we are probably about to display a menu, and we don't want to delay before doing so. */ if (EVENT_HAS_PARAMETERS (prev_event)) echo_now (); else { Lisp_Object tem0; save_getcjmp (save_jump); restore_getcjmp (local_getcjmp); tem0 = sit_for (Vecho_keystrokes, 1, 1); restore_getcjmp (save_jump); if (EQ (tem0, Qt) && ! CONSP (Vunread_command_events)) echo_now (); } } /* Maybe auto save due to number of keystrokes. */ if (commandflag != 0 && auto_save_interval > 0 && num_nonmacro_input_events - last_auto_save > max (auto_save_interval, 20) && !detect_input_pending_run_timers (0)) { Fdo_auto_save (Qnil, Qnil); /* Hooks can actually change some buffers in auto save. */ redisplay (); } /* Try reading using an X menu. This is never confused with reading using the minibuf because the recursive call of read_char in read_char_minibuf_menu_prompt does not pass on any keymaps. */ if (nmaps > 0 && INTERACTIVE && !NILP (prev_event) && EVENT_HAS_PARAMETERS (prev_event) && !EQ (XCAR (prev_event), Qmenu_bar) && !EQ (XCAR (prev_event), Qtool_bar) /* Don't bring up a menu if we already have another event. */ && NILP (Vunread_command_events) && unread_command_char < 0) { c = read_char_x_menu_prompt (nmaps, maps, prev_event, used_mouse_menu); /* Now that we have read an event, Emacs is not idle. */ if (!end_time) timer_stop_idle (); goto exit; } /* Maybe autosave and/or garbage collect due to idleness. */ if (INTERACTIVE && NILP (c)) { int delay_level, buffer_size; /* Slow down auto saves logarithmically in size of current buffer, and garbage collect while we're at it. */ if (! MINI_WINDOW_P (XWINDOW (selected_window))) last_non_minibuf_size = Z - BEG; buffer_size = (last_non_minibuf_size >> 8) + 1; delay_level = 0; while (buffer_size > 64) delay_level++, buffer_size -= buffer_size >> 2; if (delay_level < 4) delay_level = 4; /* delay_level is 4 for files under around 50k, 7 at 100k, 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ /* Auto save if enough time goes by without input. */ if (commandflag != 0 && num_nonmacro_input_events > last_auto_save && INTEGERP (Vauto_save_timeout) && XINT (Vauto_save_timeout) > 0) { Lisp_Object tem0; int timeout = delay_level * XFASTINT (Vauto_save_timeout) / 4; save_getcjmp (save_jump); restore_getcjmp (local_getcjmp); tem0 = sit_for (make_number (timeout), 1, 1); restore_getcjmp (save_jump); if (EQ (tem0, Qt) && ! CONSP (Vunread_command_events)) { Fdo_auto_save (Qnil, Qnil); /* If we have auto-saved and there is still no input available, garbage collect if there has been enough consing going on to make it worthwhile. */ if (!detect_input_pending_run_timers (0) && consing_since_gc > gc_cons_threshold / 2) Fgarbage_collect (); redisplay (); } } } /* If this has become non-nil here, it has been set by a timer or sentinel or filter. */ if (CONSP (Vunread_command_events)) { c = XCAR (Vunread_command_events); Vunread_command_events = XCDR (Vunread_command_events); } /* Read something from current KBOARD's side queue, if possible. */ if (NILP (c)) { if (current_kboard->kbd_queue_has_data) { if (!CONSP (current_kboard->kbd_queue)) abort (); c = XCAR (current_kboard->kbd_queue); current_kboard->kbd_queue = XCDR (current_kboard->kbd_queue); if (NILP (current_kboard->kbd_queue)) current_kboard->kbd_queue_has_data = 0; input_pending = readable_events (0); if (EVENT_HAS_PARAMETERS (c) && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qswitch_frame)) internal_last_event_frame = XCAR (XCDR (c)); Vlast_event_frame = internal_last_event_frame; } } #ifdef MULTI_KBOARD /* If current_kboard's side queue is empty check the other kboards. If one of them has data that we have not yet seen here, switch to it and process the data waiting for it. Note: if the events queued up for another kboard have already been seen here, and therefore are not a complete command, the kbd_queue_has_data field is 0, so we skip that kboard here. That's to avoid an infinite loop switching between kboards here. */ if (NILP (c) && !single_kboard) { KBOARD *kb; for (kb = all_kboards; kb; kb = kb->next_kboard) if (kb->kbd_queue_has_data) { current_kboard = kb; /* This is going to exit from read_char so we had better get rid of this frame's stuff. */ UNGCPRO; longjmp (wrong_kboard_jmpbuf, 1); } } #endif wrong_kboard: STOP_POLLING; /* Finally, we read from the main queue, and if that gives us something we can't use yet, we put it on the appropriate side queue and try again. */ if (NILP (c)) { KBOARD *kb; if (end_time) { EMACS_TIME now; EMACS_GET_TIME (now); if (EMACS_TIME_GE (now, *end_time)) goto exit; } /* Actually read a character, waiting if necessary. */ save_getcjmp (save_jump); restore_getcjmp (local_getcjmp); if (!end_time) timer_start_idle (); c = kbd_buffer_get_event (&kb, used_mouse_menu, end_time); restore_getcjmp (save_jump); #ifdef MULTI_KBOARD if (! NILP (c) && (kb != current_kboard)) { Lisp_Object link = kb->kbd_queue; if (CONSP (link)) { while (CONSP (XCDR (link))) link = XCDR (link); if (!NILP (XCDR (link))) abort (); } if (!CONSP (link)) kb->kbd_queue = Fcons (c, Qnil); else XSETCDR (link, Fcons (c, Qnil)); kb->kbd_queue_has_data = 1; c = Qnil; if (single_kboard) goto wrong_kboard; current_kboard = kb; /* This is going to exit from read_char so we had better get rid of this frame's stuff. */ UNGCPRO; longjmp (wrong_kboard_jmpbuf, 1); } #endif } /* Terminate Emacs in batch mode if at eof. */ if (noninteractive && INTEGERP (c) && XINT (c) < 0) Fkill_emacs (make_number (1)); if (INTEGERP (c)) { /* Add in any extra modifiers, where appropriate. */ if ((extra_keyboard_modifiers & CHAR_CTL) || ((extra_keyboard_modifiers & 0177) < ' ' && (extra_keyboard_modifiers & 0177) != 0)) XSETINT (c, make_ctrl_char (XINT (c))); /* Transfer any other modifier bits directly from extra_keyboard_modifiers to c. Ignore the actual character code in the low 16 bits of extra_keyboard_modifiers. */ XSETINT (c, XINT (c) | (extra_keyboard_modifiers & ~0xff7f & ~CHAR_CTL)); } non_reread: if (!end_time) timer_stop_idle (); RESUME_POLLING; if (NILP (c)) { if (commandflag >= 0 && !input_pending && !detect_input_pending_run_timers (0)) redisplay (); goto wrong_kboard; } non_reread_1: /* Buffer switch events are only for internal wakeups so don't show them to the user. Also, don't record a key if we already did. */ if (BUFFERP (c) || key_already_recorded) goto exit; /* Process special events within read_char and loop around to read another event. */ save = Vquit_flag; Vquit_flag = Qnil; tem = access_keymap (get_keymap (Vspecial_event_map, 0, 1), c, 0, 0, 1); Vquit_flag = save; if (!NILP (tem)) { int was_locked = single_kboard; last_input_char = c; Fcommand_execute (tem, Qnil, Fvector (1, &last_input_char), Qt); if (CONSP (c) && EQ (XCAR (c), Qselect_window) && !end_time) /* We stopped being idle for this event; undo that. This prevents automatic window selection (under mouse_autoselect_window from acting as a real input event, for example banishing the mouse under mouse-avoidance-mode. */ timer_resume_idle (); /* Resume allowing input from any kboard, if that was true before. */ if (!was_locked) any_kboard_state (); goto retry; } /* Handle things that only apply to characters. */ if (INTEGERP (c)) { /* If kbd_buffer_get_event gave us an EOF, return that. */ if (XINT (c) == -1) goto exit; if ((STRINGP (Vkeyboard_translate_table) && SCHARS (Vkeyboard_translate_table) > (unsigned) XFASTINT (c)) || (VECTORP (Vkeyboard_translate_table) && XVECTOR (Vkeyboard_translate_table)->size > (unsigned) XFASTINT (c)) || (CHAR_TABLE_P (Vkeyboard_translate_table) && CHAR_VALID_P (XINT (c), 0))) { Lisp_Object d; d = Faref (Vkeyboard_translate_table, c); /* nil in keyboard-translate-table means no translation. */ if (!NILP (d)) c = d; } } /* If this event is a mouse click in the menu bar, return just menu-bar for now. Modify the mouse click event so we won't do this twice, then queue it up. */ if (EVENT_HAS_PARAMETERS (c) && CONSP (XCDR (c)) && CONSP (EVENT_START (c)) && CONSP (XCDR (EVENT_START (c)))) { Lisp_Object posn; posn = POSN_POSN (EVENT_START (c)); /* Handle menu-bar events: insert the dummy prefix event `menu-bar'. */ if (EQ (posn, Qmenu_bar) || EQ (posn, Qtool_bar)) { /* Change menu-bar to (menu-bar) as the event "position". */ POSN_SET_POSN (EVENT_START (c), Fcons (posn, Qnil)); also_record = c; Vunread_command_events = Fcons (c, Vunread_command_events); c = posn; } } /* Store these characters into recent_keys, the dribble file if any, and the keyboard macro being defined, if any. */ record_char (c); if (! NILP (also_record)) record_char (also_record); /* Wipe the echo area. But first, if we are about to use an input method, save the echo area contents for it to refer to. */ if (INTEGERP (c) && ! NILP (Vinput_method_function) && (unsigned) XINT (c) >= ' ' && (unsigned) XINT (c) != 127 && (unsigned) XINT (c) < 256) { previous_echo_area_message = Fcurrent_message (); Vinput_method_previous_message = previous_echo_area_message; } /* Now wipe the echo area, except for help events which do their own stuff with the echo area. */ if (!CONSP (c) || (!(EQ (Qhelp_echo, XCAR (c))) && !(EQ (Qswitch_frame, XCAR (c))))) { if (!NILP (echo_area_buffer[0])) safe_run_hooks (Qecho_area_clear_hook); clear_message (1, 0); } reread_for_input_method: from_macro: /* Pass this to the input method, if appropriate. */ if (INTEGERP (c) && ! NILP (Vinput_method_function) /* Don't run the input method within a key sequence, after the first event of the key sequence. */ && NILP (prev_event) && (unsigned) XINT (c) >= ' ' && (unsigned) XINT (c) != 127 && (unsigned) XINT (c) < 256) { Lisp_Object keys; int key_count, key_count_reset; struct gcpro gcpro1; int count = SPECPDL_INDEX (); /* Save the echo status. */ int saved_immediate_echo = current_kboard->immediate_echo; struct kboard *saved_ok_to_echo = ok_to_echo_at_next_pause; Lisp_Object saved_echo_string = current_kboard->echo_string; int saved_echo_after_prompt = current_kboard->echo_after_prompt; #if 0 if (before_command_restore_flag) { this_command_key_count = before_command_key_count_1; if (this_command_key_count < this_single_command_key_start) this_single_command_key_start = this_command_key_count; echo_truncate (before_command_echo_length_1); before_command_restore_flag = 0; } #endif /* Save the this_command_keys status. */ key_count = this_command_key_count; key_count_reset = this_command_key_count_reset; if (key_count > 0) keys = Fcopy_sequence (this_command_keys); else keys = Qnil; GCPRO1 (keys); /* Clear out this_command_keys. */ this_command_key_count = 0; this_command_key_count_reset = 0; /* Now wipe the echo area. */ if (!NILP (echo_area_buffer[0])) safe_run_hooks (Qecho_area_clear_hook); clear_message (1, 0); echo_truncate (0); /* If we are not reading a key sequence, never use the echo area. */ if (maps == 0) { specbind (Qinput_method_use_echo_area, Qt); } /* Call the input method. */ tem = call1 (Vinput_method_function, c); tem = unbind_to (count, tem); /* Restore the saved echoing state and this_command_keys state. */ this_command_key_count = key_count; this_command_key_count_reset = key_count_reset; if (key_count > 0) this_command_keys = keys; cancel_echoing (); ok_to_echo_at_next_pause = saved_ok_to_echo; current_kboard->echo_string = saved_echo_string; current_kboard->echo_after_prompt = saved_echo_after_prompt; if (saved_immediate_echo) echo_now (); UNGCPRO; /* The input method can return no events. */ if (! CONSP (tem)) { /* Bring back the previous message, if any. */ if (! NILP (previous_echo_area_message)) message_with_string ("%s", previous_echo_area_message, 0); goto retry; } /* It returned one event or more. */ c = XCAR (tem); Vunread_post_input_method_events = nconc2 (XCDR (tem), Vunread_post_input_method_events); } reread_first: /* Display help if not echoing. */ if (CONSP (c) && EQ (XCAR (c), Qhelp_echo)) { /* (help-echo FRAME HELP WINDOW OBJECT POS). */ Lisp_Object help, object, position, window, tem; tem = Fcdr (XCDR (c)); help = Fcar (tem); tem = Fcdr (tem); window = Fcar (tem); tem = Fcdr (tem); object = Fcar (tem); tem = Fcdr (tem); position = Fcar (tem); show_help_echo (help, window, object, position, 0); /* We stopped being idle for this event; undo that. */ if (!end_time) timer_resume_idle (); goto retry; } if ((! reread || this_command_key_count == 0 || this_command_key_count_reset) && !end_time) { /* Don't echo mouse motion events. */ if ((FLOATP (Vecho_keystrokes) || INTEGERP (Vecho_keystrokes)) && NILP (Fzerop (Vecho_keystrokes)) && ! (EVENT_HAS_PARAMETERS (c) && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement))) { echo_char (c); if (! NILP (also_record)) echo_char (also_record); /* Once we reread a character, echoing can happen the next time we pause to read a new one. */ ok_to_echo_at_next_pause = current_kboard; } /* Record this character as part of the current key. */ add_command_key (c); if (! NILP (also_record)) add_command_key (also_record); } last_input_char = c; num_input_events++; /* Process the help character specially if enabled */ if (!NILP (Vhelp_form) && help_char_p (c)) { Lisp_Object tem0; count = SPECPDL_INDEX (); help_form_saved_window_configs = Fcons (Fcurrent_window_configuration (Qnil), help_form_saved_window_configs); record_unwind_protect (read_char_help_form_unwind, Qnil); tem0 = Feval (Vhelp_form); if (STRINGP (tem0)) internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); cancel_echoing (); do { c = read_char (0, 0, 0, Qnil, 0, NULL); if (EVENT_HAS_PARAMETERS (c) && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_click)) XSETCAR (help_form_saved_window_configs, Qnil); } while (BUFFERP (c)); /* Remove the help from the frame */ unbind_to (count, Qnil); redisplay (); if (EQ (c, make_number (040))) { cancel_echoing (); do c = read_char (0, 0, 0, Qnil, 0, NULL); while (BUFFERP (c)); } } exit: RESUME_POLLING; RETURN_UNGCPRO (c); } /* Record a key that came from a mouse menu. Record it for echoing, for this-command-keys, and so on. */ static void record_menu_key (c) Lisp_Object c; { /* Wipe the echo area. */ clear_message (1, 0); record_char (c); #if 0 before_command_key_count = this_command_key_count; before_command_echo_length = echo_length (); #endif /* Don't echo mouse motion events. */ if ((FLOATP (Vecho_keystrokes) || INTEGERP (Vecho_keystrokes)) && NILP (Fzerop (Vecho_keystrokes))) { echo_char (c); /* Once we reread a character, echoing can happen the next time we pause to read a new one. */ ok_to_echo_at_next_pause = 0; } /* Record this character as part of the current key. */ add_command_key (c); /* Re-reading in the middle of a command */ last_input_char = c; num_input_events++; } /* Return 1 if should recognize C as "the help character". */ int help_char_p (c) Lisp_Object c; { Lisp_Object tail; if (EQ (c, Vhelp_char)) return 1; for (tail = Vhelp_event_list; CONSP (tail); tail = XCDR (tail)) if (EQ (c, XCAR (tail))) return 1; return 0; } /* Record the input event C in various ways. */ static void record_char (c) Lisp_Object c; { int recorded = 0; if (CONSP (c) && (EQ (XCAR (c), Qhelp_echo) || EQ (XCAR (c), Qmouse_movement))) { /* To avoid filling recent_keys with help-echo and mouse-movement events, we filter out repeated help-echo events, only store the first and last in a series of mouse-movement events, and don't store repeated help-echo events which are only separated by mouse-movement events. */ Lisp_Object ev1, ev2, ev3; int ix1, ix2, ix3; if ((ix1 = recent_keys_index - 1) < 0) ix1 = NUM_RECENT_KEYS - 1; ev1 = AREF (recent_keys, ix1); if ((ix2 = ix1 - 1) < 0) ix2 = NUM_RECENT_KEYS - 1; ev2 = AREF (recent_keys, ix2); if ((ix3 = ix2 - 1) < 0) ix3 = NUM_RECENT_KEYS - 1; ev3 = AREF (recent_keys, ix3); if (EQ (XCAR (c), Qhelp_echo)) { /* Don't record `help-echo' in recent_keys unless it shows some help message, and a different help than the previously recorded event. */ Lisp_Object help, last_help; help = Fcar_safe (Fcdr_safe (XCDR (c))); if (!STRINGP (help)) recorded = 1; else if (CONSP (ev1) && EQ (XCAR (ev1), Qhelp_echo) && (last_help = Fcar_safe (Fcdr_safe (XCDR (ev1))), EQ (last_help, help))) recorded = 1; else if (CONSP (ev1) && EQ (XCAR (ev1), Qmouse_movement) && CONSP (ev2) && EQ (XCAR (ev2), Qhelp_echo) && (last_help = Fcar_safe (Fcdr_safe (XCDR (ev2))), EQ (last_help, help))) recorded = -1; else if (CONSP (ev1) && EQ (XCAR (ev1), Qmouse_movement) && CONSP (ev2) && EQ (XCAR (ev2), Qmouse_movement) && CONSP (ev3) && EQ (XCAR (ev3), Qhelp_echo) && (last_help = Fcar_safe (Fcdr_safe (XCDR (ev3))), EQ (last_help, help))) recorded = -2; } else if (EQ (XCAR (c), Qmouse_movement)) { /* Only record one pair of `mouse-movement' on a window in recent_keys. So additional mouse movement events replace the last element. */ Lisp_Object last_window, window; window = Fcar_safe (Fcar_safe (XCDR (c))); if (CONSP (ev1) && EQ (XCAR (ev1), Qmouse_movement) && (last_window = Fcar_safe (Fcar_safe (XCDR (ev1))), EQ (last_window, window)) && CONSP (ev2) && EQ (XCAR (ev2), Qmouse_movement) && (last_window = Fcar_safe (Fcar_safe (XCDR (ev2))), EQ (last_window, window))) { ASET (recent_keys, ix1, c); recorded = 1; } } } else store_kbd_macro_char (c); if (!recorded) { total_keys++; ASET (recent_keys, recent_keys_index, c); if (++recent_keys_index >= NUM_RECENT_KEYS) recent_keys_index = 0; } else if (recorded < 0) { /* We need to remove one or two events from recent_keys. To do this, we simply put nil at those events and move the recent_keys_index backwards over those events. Usually, users will never see those nil events, as they will be overwritten by the command keys entered to see recent_keys (e.g. C-h l). */ while (recorded++ < 0 && total_keys > 0) { if (total_keys < NUM_RECENT_KEYS) total_keys--; if (--recent_keys_index < 0) recent_keys_index = NUM_RECENT_KEYS - 1; ASET (recent_keys, recent_keys_index, Qnil); } } num_nonmacro_input_events++; /* Write c to the dribble file. If c is a lispy event, write the event's symbol to the dribble file, in . Bleaugh. If you, dear reader, have a better idea, you've got the source. :-) */ if (dribble) { BLOCK_INPUT; if (INTEGERP (c)) { if (XUINT (c) < 0x100) putc (XINT (c), dribble); else fprintf (dribble, " 0x%x", (int) XUINT (c)); } else { Lisp_Object dribblee; /* If it's a structured event, take the event header. */ dribblee = EVENT_HEAD (c); if (SYMBOLP (dribblee)) { putc ('<', dribble); fwrite (SDATA (SYMBOL_NAME (dribblee)), sizeof (char), SBYTES (SYMBOL_NAME (dribblee)), dribble); putc ('>', dribble); } } fflush (dribble); UNBLOCK_INPUT; } } Lisp_Object print_help (object) Lisp_Object object; { struct buffer *old = current_buffer; Fprinc (object, Qnil); set_buffer_internal (XBUFFER (Vstandard_output)); call0 (intern ("help-mode")); set_buffer_internal (old); return Qnil; } /* Copy out or in the info on where C-g should throw to. This is used when running Lisp code from within get_char, in case get_char is called recursively. See read_process_output. */ static void save_getcjmp (temp) jmp_buf temp; { bcopy (getcjmp, temp, sizeof getcjmp); } static void restore_getcjmp (temp) jmp_buf temp; { bcopy (temp, getcjmp, sizeof getcjmp); } /* Low level keyboard/mouse input. kbd_buffer_store_event places events in kbd_buffer, and kbd_buffer_get_event retrieves them. */ /* Return true if there are any events in the queue that read-char would return. If this returns false, a read-char would block. */ static int readable_events (flags) int flags; { if (flags & READABLE_EVENTS_DO_TIMERS_NOW) timer_check (1); /* If the buffer contains only FOCUS_IN_EVENT events, and READABLE_EVENTS_FILTER_EVENTS is set, report it as empty. */ if (kbd_fetch_ptr != kbd_store_ptr) { if (flags & (READABLE_EVENTS_FILTER_EVENTS #ifdef USE_TOOLKIT_SCROLL_BARS | READABLE_EVENTS_IGNORE_SQUEEZABLES #endif )) { struct input_event *event; event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) ? kbd_fetch_ptr : kbd_buffer); do { if (!( #ifdef USE_TOOLKIT_SCROLL_BARS (flags & READABLE_EVENTS_FILTER_EVENTS) && #endif event->kind == FOCUS_IN_EVENT) #ifdef USE_TOOLKIT_SCROLL_BARS && !((flags & READABLE_EVENTS_IGNORE_SQUEEZABLES) && event->kind == SCROLL_BAR_CLICK_EVENT && event->part == scroll_bar_handle && event->modifiers == 0) #endif ) return 1; event++; if (event == kbd_buffer + KBD_BUFFER_SIZE) event = kbd_buffer; } while (event != kbd_store_ptr); } else return 1; } #ifdef HAVE_MOUSE if (!(flags & READABLE_EVENTS_IGNORE_SQUEEZABLES) && !NILP (do_mouse_tracking) && some_mouse_moved ()) return 1; #endif if (single_kboard) { if (current_kboard->kbd_queue_has_data) return 1; } else { KBOARD *kb; for (kb = all_kboards; kb; kb = kb->next_kboard) if (kb->kbd_queue_has_data) return 1; } return 0; } /* Set this for debugging, to have a way to get out */ int stop_character; #ifdef MULTI_KBOARD static KBOARD * event_to_kboard (event) struct input_event *event; { Lisp_Object frame; frame = event->frame_or_window; if (CONSP (frame)) frame = XCAR (frame); else if (WINDOWP (frame)) frame = WINDOW_FRAME (XWINDOW (frame)); /* There are still some events that don't set this field. For now, just ignore the problem. Also ignore dead frames here. */ if (!FRAMEP (frame) || !FRAME_LIVE_P (XFRAME (frame))) return 0; else return FRAME_KBOARD (XFRAME (frame)); } #endif Lisp_Object Vthrow_on_input; /* Store an event obtained at interrupt level into kbd_buffer, fifo */ void kbd_buffer_store_event (event) register struct input_event *event; { kbd_buffer_store_event_hold (event, 0); } /* Store EVENT obtained at interrupt level into kbd_buffer, fifo. If HOLD_QUIT is 0, just stuff EVENT into the fifo. Else, if HOLD_QUIT.kind != NO_EVENT, discard EVENT. Else, if EVENT is a quit event, store the quit event in HOLD_QUIT, and return (thus ignoring further events). This is used in read_avail_input to postpone the processing of the quit event until all subsequent input events have been parsed (and discarded). */ void kbd_buffer_store_event_hold (event, hold_quit) register struct input_event *event; struct input_event *hold_quit; { if (event->kind == NO_EVENT) abort (); if (hold_quit && hold_quit->kind != NO_EVENT) return; #ifdef MEADOW W32_BLOCK_EVENT; #endif if (event->kind == ASCII_KEYSTROKE_EVENT) { register int c = event->code & 0377; if (event->modifiers & ctrl_modifier) c = make_ctrl_char (c); c |= (event->modifiers & (meta_modifier | alt_modifier | hyper_modifier | super_modifier)); if (c == quit_char) { #ifdef MULTI_KBOARD KBOARD *kb; struct input_event *sp; if (single_kboard && (kb = FRAME_KBOARD (XFRAME (event->frame_or_window)), kb != current_kboard)) { kb->kbd_queue = Fcons (make_lispy_switch_frame (event->frame_or_window), Fcons (make_number (c), Qnil)); kb->kbd_queue_has_data = 1; for (sp = kbd_fetch_ptr; sp != kbd_store_ptr; sp++) { if (sp == kbd_buffer + KBD_BUFFER_SIZE) sp = kbd_buffer; if (event_to_kboard (sp) == kb) { sp->kind = NO_EVENT; sp->frame_or_window = Qnil; sp->arg = Qnil; } } #ifdef MEADOW W32_UNBLOCK_EVENT; #endif return; } #endif if (hold_quit) { bcopy (event, (char *) hold_quit, sizeof (*event)); #ifdef MEADOW W32_UNBLOCK_EVENT; #endif return; } /* If this results in a quit_char being returned to Emacs as input, set Vlast_event_frame properly. If this doesn't get returned to Emacs as an event, the next event read will set Vlast_event_frame again, so this is safe to do. */ { Lisp_Object focus; focus = FRAME_FOCUS_FRAME (XFRAME (event->frame_or_window)); if (NILP (focus)) focus = event->frame_or_window; internal_last_event_frame = focus; Vlast_event_frame = focus; } last_event_timestamp = event->timestamp; #ifdef MEADOW W32_UNBLOCK_EVENT; #endif interrupt_signal (0 /* dummy */); return; } if (c && c == stop_character) { #ifdef MEADOW W32_UNBLOCK_EVENT; #endif sys_suspend (); return; } } /* Don't insert two BUFFER_SWITCH_EVENT's in a row. Just ignore the second one. */ else if (event->kind == BUFFER_SWITCH_EVENT && kbd_fetch_ptr != kbd_store_ptr && ((kbd_store_ptr == kbd_buffer ? kbd_buffer + KBD_BUFFER_SIZE - 1 : kbd_store_ptr - 1)->kind) == BUFFER_SWITCH_EVENT) #ifdef MEADOW { W32_UNBLOCK_EVENT; return; } #else return; #endif if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) kbd_store_ptr = kbd_buffer; /* Don't let the very last slot in the buffer become full, since that would make the two pointers equal, and that is indistinguishable from an empty buffer. Discard the event if it would fill the last slot. */ if (kbd_fetch_ptr - 1 != kbd_store_ptr) { *kbd_store_ptr = *event; ++kbd_store_ptr; } #ifdef MEADOW W32_UNBLOCK_EVENT; #endif /* If we're inside while-no-input, and this event qualifies as input, set quit-flag to cause an interrupt. */ if (!NILP (Vthrow_on_input) && event->kind != FOCUS_IN_EVENT && event->kind != HELP_EVENT && event->kind != DEICONIFY_EVENT) { Vquit_flag = Vthrow_on_input; /* If we're inside a function that wants immediate quits, do it now. */ if (immediate_quit && NILP (Vinhibit_quit)) { immediate_quit = 0; sigfree (); QUIT; } } } /* Put an input event back in the head of the event queue. */ void kbd_buffer_unget_event (event) register struct input_event *event; { if (kbd_fetch_ptr == kbd_buffer) kbd_fetch_ptr = kbd_buffer + KBD_BUFFER_SIZE; /* Don't let the very last slot in the buffer become full, */ if (kbd_fetch_ptr - 1 != kbd_store_ptr) { --kbd_fetch_ptr; *kbd_fetch_ptr = *event; } } /* Generate HELP_EVENT input_events in BUFP which has room for SIZE events. If there's not enough room in BUFP, ignore this event. HELP is the help form. FRAME is the frame on which the help is generated. OBJECT is the Lisp object where the help was found (a buffer, a string, an overlay, or nil if neither from a string nor from a buffer. POS is the position within OBJECT where the help was found. Value is the number of input_events generated. */ void gen_help_event (help, frame, window, object, pos) Lisp_Object help, frame, object, window; int pos; { struct input_event event; EVENT_INIT (event); event.kind = HELP_EVENT; event.frame_or_window = frame; event.arg = object; event.x = WINDOWP (window) ? window : frame; event.y = help; event.code = pos; kbd_buffer_store_event (&event); } /* Store HELP_EVENTs for HELP on FRAME in the input queue. */ void kbd_buffer_store_help_event (frame, help) Lisp_Object frame, help; { struct input_event event; event.kind = HELP_EVENT; event.frame_or_window = frame; event.arg = Qnil; event.x = Qnil; event.y = help; event.code = 0; kbd_buffer_store_event (&event); } /* Discard any mouse events in the event buffer by setting them to NO_EVENT. */ void discard_mouse_events () { struct input_event *sp; for (sp = kbd_fetch_ptr; sp != kbd_store_ptr; sp++) { if (sp == kbd_buffer + KBD_BUFFER_SIZE) sp = kbd_buffer; if (sp->kind == MOUSE_CLICK_EVENT || sp->kind == WHEEL_EVENT #ifdef WINDOWSNT || sp->kind == W32_SCROLL_BAR_CLICK_EVENT #endif || sp->kind == SCROLL_BAR_CLICK_EVENT) { sp->kind = NO_EVENT; } } } /* Return non-zero if there are any real events waiting in the event buffer, not counting `NO_EVENT's. If DISCARD is non-zero, discard NO_EVENT events at the front of the input queue, possibly leaving the input queue empty if there are no real input events. */ int kbd_buffer_events_waiting (discard) int discard; { struct input_event *sp; for (sp = kbd_fetch_ptr; sp != kbd_store_ptr && sp->kind == NO_EVENT; ++sp) { if (sp == kbd_buffer + KBD_BUFFER_SIZE) sp = kbd_buffer; } if (discard) kbd_fetch_ptr = sp; return sp != kbd_store_ptr && sp->kind != NO_EVENT; } /* Clear input event EVENT. */ static INLINE void clear_event (event) struct input_event *event; { event->kind = NO_EVENT; } /* Read one event from the event buffer, waiting if necessary. The value is a Lisp object representing the event. The value is nil for an event that should be ignored, or that was handled here. We always read and discard one event. */ static Lisp_Object kbd_buffer_get_event (kbp, used_mouse_menu, end_time) KBOARD **kbp; int *used_mouse_menu; EMACS_TIME *end_time; { register int c; Lisp_Object obj; #ifdef MEADOW extern void note_sync_event (void); #endif if (noninteractive) { c = getchar (); XSETINT (obj, c); *kbp = current_kboard; return obj; } /* Wait until there is input available. */ for (;;) { /* Break loop if there's an unread command event. Needed in moused window autoselection which uses a timer to insert such events. */ if (CONSP (Vunread_command_events)) break; if (kbd_fetch_ptr != kbd_store_ptr) break; #ifdef HAVE_MOUSE if (!NILP (do_mouse_tracking) && some_mouse_moved ()) break; #endif /* If the quit flag is set, then read_char will return quit_char, so that counts as "available input." */ if (!NILP (Vquit_flag)) quit_throw_to_read_char (); /* One way or another, wait until input is available; then, if interrupt handlers have not read it, read it now. */ #ifdef OLDVMS wait_for_kbd_input (); #else /* Note SIGIO has been undef'd if FIONREAD is missing. */ #ifdef SIGIO gobble_input (0); #endif /* SIGIO */ if (kbd_fetch_ptr != kbd_store_ptr) break; #ifdef HAVE_MOUSE if (!NILP (do_mouse_tracking) && some_mouse_moved ()) break; #endif if (end_time) { EMACS_TIME duration; EMACS_GET_TIME (duration); if (EMACS_TIME_GE (duration, *end_time)) return Qnil; /* finished waiting */ else { #ifdef MEADOW note_sync_event (); #endif EMACS_SUB_TIME (duration, *end_time, duration); wait_reading_process_output (EMACS_SECS (duration), EMACS_USECS (duration), -1, 1, Qnil, NULL, 0); } } else #ifdef MEADOW { note_sync_event (); wait_reading_process_output (0, 0, -1, 1, Qnil, NULL, 0); } #else wait_reading_process_output (0, 0, -1, 1, Qnil, NULL, 0); #endif if (!interrupt_input && kbd_fetch_ptr == kbd_store_ptr) /* Pass 1 for EXPECT since we just waited to have input. */ read_avail_input (1); #endif /* not VMS */ } if (CONSP (Vunread_command_events)) { Lisp_Object first; first = XCAR (Vunread_command_events); Vunread_command_events = XCDR (Vunread_command_events); *kbp = current_kboard; return first; } /* At this point, we know that there is a readable event available somewhere. If the event queue is empty, then there must be a mouse movement enabled and available. */ if (kbd_fetch_ptr != kbd_store_ptr) { struct input_event *event; event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) ? kbd_fetch_ptr : kbd_buffer); last_event_timestamp = event->timestamp; #ifdef MULTI_KBOARD *kbp = event_to_kboard (event); if (*kbp == 0) *kbp = current_kboard; /* Better than returning null ptr? */ #else *kbp = &the_only_kboard; #endif obj = Qnil; /* These two kinds of events get special handling and don't actually appear to the command loop. We return nil for them. */ if (event->kind == SELECTION_REQUEST_EVENT || event->kind == SELECTION_CLEAR_EVENT) { #ifdef HAVE_X11 struct input_event copy; /* Remove it from the buffer before processing it, since otherwise swallow_events will see it and process it again. */ copy = *event; kbd_fetch_ptr = event + 1; input_pending = readable_events (0); x_handle_selection_event (©); #else /* We're getting selection request events, but we don't have a window system. */ abort (); #endif } #if defined (HAVE_X11) || defined (HAVE_NTGUI) || defined (MAC_OS) else if (event->kind == DELETE_WINDOW_EVENT) { /* Make an event (delete-frame (FRAME)). */ obj = Fcons (event->frame_or_window, Qnil); obj = Fcons (Qdelete_frame, Fcons (obj, Qnil)); kbd_fetch_ptr = event + 1; } #endif #if defined (HAVE_X11) || defined (HAVE_NTGUI) || defined (MAC_OS) else if (event->kind == ICONIFY_EVENT) { /* Make an event (iconify-frame (FRAME)). */ obj = Fcons (event->frame_or_window, Qnil); obj = Fcons (Qiconify_frame, Fcons (obj, Qnil)); kbd_fetch_ptr = event + 1; } else if (event->kind == DEICONIFY_EVENT) { /* Make an event (make-frame-visible (FRAME)). */ obj = Fcons (event->frame_or_window, Qnil); obj = Fcons (Qmake_frame_visible, Fcons (obj, Qnil)); kbd_fetch_ptr = event + 1; } #endif else if (event->kind == BUFFER_SWITCH_EVENT) { /* The value doesn't matter here; only the type is tested. */ XSETBUFFER (obj, current_buffer); kbd_fetch_ptr = event + 1; } #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ || defined (USE_GTK) else if (event->kind == MENU_BAR_ACTIVATE_EVENT) { kbd_fetch_ptr = event + 1; input_pending = readable_events (0); if (FRAME_LIVE_P (XFRAME (event->frame_or_window))) x_activate_menubar (XFRAME (event->frame_or_window)); } #endif #if defined (WINDOWSNT) || defined (MAC_OS) else if (event->kind == LANGUAGE_CHANGE_EVENT) { #ifdef MAC_OS /* Make an event (language-change (KEY_SCRIPT)). */ obj = Fcons (make_number (event->code), Qnil); #else /* Make an event (language-change (FRAME CHARSET LCID)). */ obj = Fcons (event->frame_or_window, Qnil); #endif obj = Fcons (Qlanguage_change, Fcons (obj, Qnil)); kbd_fetch_ptr = event + 1; } #endif else if (event->kind == SAVE_SESSION_EVENT) { obj = Fcons (Qsave_session, Qnil); kbd_fetch_ptr = event + 1; } /* Just discard these, by returning nil. With MULTI_KBOARD, these events are used as placeholders when we need to randomly delete events from the queue. (They shouldn't otherwise be found in the buffer, but on some machines it appears they do show up even without MULTI_KBOARD.) */ /* On Windows NT/9X, NO_EVENT is used to delete extraneous mouse events during a popup-menu call. */ else if (event->kind == NO_EVENT) kbd_fetch_ptr = event + 1; else if (event->kind == HELP_EVENT) { Lisp_Object object, position, help, frame, window; frame = event->frame_or_window; object = event->arg; position = make_number (event->code); window = event->x; help = event->y; clear_event (event); kbd_fetch_ptr = event + 1; if (!WINDOWP (window)) window = Qnil; obj = Fcons (Qhelp_echo, list5 (frame, help, window, object, position)); } else if (event->kind == FOCUS_IN_EVENT) { /* Notification of a FocusIn event. The frame receiving the focus is in event->frame_or_window. Generate a switch-frame event if necessary. */ Lisp_Object frame, focus; frame = event->frame_or_window; focus = FRAME_FOCUS_FRAME (XFRAME (frame)); if (FRAMEP (focus)) frame = focus; if (!EQ (frame, internal_last_event_frame) && !EQ (frame, selected_frame)) obj = make_lispy_switch_frame (frame); internal_last_event_frame = frame; kbd_fetch_ptr = event + 1; } else { /* If this event is on a different frame, return a switch-frame this time, and leave the event in the queue for next time. */ Lisp_Object frame; Lisp_Object focus; frame = event->frame_or_window; if (CONSP (frame)) frame = XCAR (frame); else if (WINDOWP (frame)) frame = WINDOW_FRAME (XWINDOW (frame)); focus = FRAME_FOCUS_FRAME (XFRAME (frame)); if (! NILP (focus)) frame = focus; if (! EQ (frame, internal_last_event_frame) && !EQ (frame, selected_frame)) obj = make_lispy_switch_frame (frame); internal_last_event_frame = frame; /* If we didn't decide to make a switch-frame event, go ahead and build a real event from the queue entry. */ if (NILP (obj)) { obj = make_lispy_event (event); #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined(MAC_OS) \ || defined (USE_GTK) /* If this was a menu selection, then set the flag to inhibit writing to last_nonmenu_event. Don't do this if the event we're returning is (menu-bar), though; that indicates the beginning of the menu sequence, and we might as well leave that as the `event with parameters' for this selection. */ if (used_mouse_menu && !EQ (event->frame_or_window, event->arg) && (event->kind == MENU_BAR_EVENT || event->kind == TOOL_BAR_EVENT)) *used_mouse_menu = 1; #endif /* Wipe out this event, to catch bugs. */ clear_event (event); kbd_fetch_ptr = event + 1; } } } #ifdef HAVE_MOUSE /* Try generating a mouse motion event. */ else if (!NILP (do_mouse_tracking) && some_mouse_moved ()) { FRAME_PTR f = some_mouse_moved (); Lisp_Object bar_window; enum scroll_bar_part part; Lisp_Object x, y; unsigned long time; *kbp = current_kboard; /* Note that this uses F to determine which display to look at. If there is no valid info, it does not store anything so x remains nil. */ x = Qnil; (*mouse_position_hook) (&f, 0, &bar_window, &part, &x, &y, &time); obj = Qnil; /* Decide if we should generate a switch-frame event. Don't generate switch-frame events for motion outside of all Emacs frames. */ if (!NILP (x) && f) { Lisp_Object frame; frame = FRAME_FOCUS_FRAME (f); if (NILP (frame)) XSETFRAME (frame, f); if (! EQ (frame, internal_last_event_frame) && !EQ (frame, selected_frame)) obj = make_lispy_switch_frame (frame); internal_last_event_frame = frame; } /* If we didn't decide to make a switch-frame event, go ahead and return a mouse-motion event. */ if (!NILP (x) && NILP (obj)) obj = make_lispy_movement (f, bar_window, part, x, y, time); } #endif /* HAVE_MOUSE */ else /* We were promised by the above while loop that there was something for us to read! */ abort (); input_pending = readable_events (0); Vlast_event_frame = internal_last_event_frame; return (obj); } /* Process any events that are not user-visible, then return, without reading any user-visible events. */ void swallow_events (do_display) int do_display; { int old_timers_run; while (kbd_fetch_ptr != kbd_store_ptr) { struct input_event *event; event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) ? kbd_fetch_ptr : kbd_buffer); last_event_timestamp = event->timestamp; /* These two kinds of events get special handling and don't actually appear to the command loop. */ if (event->kind == SELECTION_REQUEST_EVENT || event->kind == SELECTION_CLEAR_EVENT) { #ifdef HAVE_X11 struct input_event copy; /* Remove it from the buffer before processing it, since otherwise swallow_events called recursively could see it and process it again. */ copy = *event; kbd_fetch_ptr = event + 1; input_pending = readable_events (0); x_handle_selection_event (©); #else /* We're getting selection request events, but we don't have a window system. */ abort (); #endif } else break; } old_timers_run = timers_run; get_input_pending (&input_pending, READABLE_EVENTS_DO_TIMERS_NOW); if (timers_run != old_timers_run && do_display) redisplay_preserve_echo_area (7); } /* Record the start of when Emacs is idle, for the sake of running idle-time timers. */ static void timer_start_idle () { Lisp_Object timers; /* If we are already in the idle state, do nothing. */ if (! EMACS_TIME_NEG_P (timer_idleness_start_time)) return; EMACS_GET_TIME (timer_idleness_start_time); timer_last_idleness_start_time = timer_idleness_start_time; /* Mark all idle-time timers as once again candidates for running. */ for (timers = Vtimer_idle_list; CONSP (timers); timers = XCDR (timers)) { Lisp_Object timer; timer = XCAR (timers); if (!VECTORP (timer) || XVECTOR (timer)->size != 8) continue; XVECTOR (timer)->contents[0] = Qnil; } } /* Record that Emacs is no longer idle, so stop running idle-time timers. */ static void timer_stop_idle () { EMACS_SET_SECS_USECS (timer_idleness_start_time, -1, -1); } /* Resume idle timer from last idle start time. */ static void timer_resume_idle () { if (! EMACS_TIME_NEG_P (timer_idleness_start_time)) return; timer_idleness_start_time = timer_last_idleness_start_time; } /* This is only for debugging. */ struct input_event last_timer_event; /* Check whether a timer has fired. To prevent larger problems we simply disregard elements that are not proper timers. Do not make a circular timer list for the time being. Returns the number of seconds to wait until the next timer fires. If a timer is triggering now, return zero seconds. If no timer is active, return -1 seconds. If a timer is ripe, we run it, with quitting turned off. DO_IT_NOW is now ignored. It used to mean that we should run the timer directly instead of queueing a timer-event. Now we always run timers directly. */ EMACS_TIME timer_check (do_it_now) int do_it_now; { EMACS_TIME nexttime; EMACS_TIME now, idleness_now; Lisp_Object timers, idle_timers, chosen_timer; struct gcpro gcpro1, gcpro2, gcpro3; EMACS_SET_SECS (nexttime, -1); EMACS_SET_USECS (nexttime, -1); /* Always consider the ordinary timers. */ timers = Vtimer_list; /* Consider the idle timers only if Emacs is idle. */ if (! EMACS_TIME_NEG_P (timer_idleness_start_time)) idle_timers = Vtimer_idle_list; else idle_timers = Qnil; chosen_timer = Qnil; GCPRO3 (timers, idle_timers, chosen_timer); if (CONSP (timers) || CONSP (idle_timers)) { EMACS_GET_TIME (now); if (! EMACS_TIME_NEG_P (timer_idleness_start_time)) EMACS_SUB_TIME (idleness_now, now, timer_idleness_start_time); } while (CONSP (timers) || CONSP (idle_timers)) { Lisp_Object *vector; Lisp_Object timer = Qnil, idle_timer = Qnil; EMACS_TIME timer_time, idle_timer_time; EMACS_TIME difference, timer_difference, idle_timer_difference; /* Skip past invalid timers and timers already handled. */ if (!NILP (timers)) { timer = XCAR (timers); if (!VECTORP (timer) || XVECTOR (timer)->size != 8) { timers = XCDR (timers); continue; } vector = XVECTOR (timer)->contents; if (!INTEGERP (vector[1]) || !INTEGERP (vector[2]) || !INTEGERP (vector[3]) || ! NILP (vector[0])) { timers = XCDR (timers); continue; } } if (!NILP (idle_timers)) { timer = XCAR (idle_timers); if (!VECTORP (timer) || XVECTOR (timer)->size != 8) { idle_timers = XCDR (idle_timers); continue; } vector = XVECTOR (timer)->contents; if (!INTEGERP (vector[1]) || !INTEGERP (vector[2]) || !INTEGERP (vector[3]) || ! NILP (vector[0])) { idle_timers = XCDR (idle_timers); continue; } } /* Set TIMER, TIMER_TIME and TIMER_DIFFERENCE based on the next ordinary timer. TIMER_DIFFERENCE is the distance in time fr