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3731 lines
101 KiB
C
3731 lines
101 KiB
C
/* Keyboard and mouse input; editor command loop.
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Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Allow config.h to undefine symbols found here. */
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#include <signal.h>
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#include "config.h"
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#include <stdio.h>
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#undef NULL
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#include "termchar.h"
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#include "termopts.h"
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#include "lisp.h"
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#include "termhooks.h"
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#include "macros.h"
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#include "frame.h"
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#include "window.h"
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#include "commands.h"
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#include "buffer.h"
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#include "disptab.h"
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#include "keyboard.h"
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#include <setjmp.h>
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#include <errno.h>
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#ifndef VMS
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#include <sys/ioctl.h>
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#endif
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#include "syssignal.h"
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#include "systty.h"
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#include "systime.h"
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extern int errno;
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#ifdef HAVE_X_WINDOWS
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extern Lisp_Object Vmouse_grabbed;
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/* Make all keyboard buffers much bigger when using X windows. */
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#define KBD_BUFFER_SIZE 4096
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#else /* No X-windows, character input */
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#define KBD_BUFFER_SIZE 256
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#endif /* No X-windows */
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/* Following definition copied from eval.c */
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struct backtrace
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{
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struct backtrace *next;
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Lisp_Object *function;
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Lisp_Object *args; /* Points to vector of args. */
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int nargs; /* length of vector. If nargs is UNEVALLED,
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args points to slot holding list of
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unevalled args */
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char evalargs;
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};
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/* Non-nil disable property on a command means
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do not execute it; call disabled-command-hook's value instead. */
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Lisp_Object Qdisabled, Vdisabled_command_hook;
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#define NUM_RECENT_KEYS (100)
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int recent_keys_index; /* Index for storing next element into recent_keys */
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int total_keys; /* Total number of elements stored into recent_keys */
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Lisp_Object recent_keys; /* A vector, holding the last 100 keystrokes */
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/* Buffer holding the key that invoked the current command. */
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Lisp_Object *this_command_keys;
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int this_command_key_count; /* Size in use. */
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int this_command_keys_size; /* Size allocated. */
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extern int minbuf_level;
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extern struct backtrace *backtrace_list;
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/* Nonzero means do menu prompting. */
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static int menu_prompting;
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/* Character to see next line of menu prompt. */
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static Lisp_Object menu_prompt_more_char;
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/* For longjmp to where kbd input is being done. */
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static jmp_buf getcjmp;
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/* True while doing kbd input. */
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int waiting_for_input;
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/* True while displaying for echoing. Delays C-g throwing. */
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static int echoing;
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/* Nonzero means C-G should cause immediate error-signal. */
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int immediate_quit;
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/* Character to recognize as the help char. */
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Lisp_Object help_char;
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/* Form to execute when help char is typed. */
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Lisp_Object Vhelp_form;
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/* Character that causes a quit. Normally C-g.
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If we are running on an ordinary terminal, this must be an ordinary
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ASCII char, since we want to make it our interrupt character.
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If we are not running on an ordinary terminal, it still needs to be
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an ordinary ASCII char. This character needs to be recognized in
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the input interrupt handler. At this point, the keystroke is
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represented as a struct input_event, while the desired quit
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character is specified as a lispy event. The mapping from struct
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input_events to lispy events cannot run in an interrupt handler,
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and the reverse mapping is difficult for anything but ASCII
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keystrokes.
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FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an
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ASCII character. */
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int quit_char;
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extern Lisp_Object current_global_map;
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extern int minibuf_level;
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/* Current depth in recursive edits. */
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int command_loop_level;
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/* Total number of times command_loop has read a key sequence. */
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int num_input_keys;
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/* Last input character read as a command. */
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Lisp_Object last_command_char;
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/* Last input character read as a command, not counting menus
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reached by the mouse. */
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Lisp_Object last_nonmenu_event;
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/* Last input character read for any purpose. */
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Lisp_Object last_input_char;
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/* If not Qnil, an object to be read as the next command input. */
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Lisp_Object unread_command_char;
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/* Char to use as prefix when a meta character is typed in.
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This is bound on entry to minibuffer in case ESC is changed there. */
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Lisp_Object meta_prefix_char;
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/* Last size recorded for a current buffer which is not a minibuffer. */
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static int last_non_minibuf_size;
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/* Number of idle seconds before an auto-save and garbage collection. */
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static Lisp_Object Vauto_save_timeout;
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/* Total number of times read_char has returned. */
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int num_input_chars;
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/* Total number of times read_char has returned, outside of macros. */
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int num_nonmacro_input_chars;
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/* Auto-save automatically when this many characters have been typed
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since the last time. */
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static int auto_save_interval;
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/* Value of num_nonmacro_input_chars as of last auto save. */
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int last_auto_save;
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/* Last command executed by the editor command loop, not counting
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commands that set the prefix argument. */
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Lisp_Object last_command;
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/* The command being executed by the command loop.
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Commands may set this, and the value set will be copied into last_command
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instead of the actual command. */
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Lisp_Object this_command;
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#ifdef MULTI_FRAME
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/* The frame in which the last input event occurred, or Qmacro if the
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last event came from a macro.
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command_loop_1 will select this frame before running the
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command bound to an event sequence, and read_key_sequence will
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toss the existing prefix if the user starts typing at a
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new frame. */
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Lisp_Object Vlast_event_frame;
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#endif
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/* The timestamp of the last input event we received from the X server.
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X Windows wants this for selection ownership. */
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unsigned long last_event_timestamp;
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Lisp_Object Qself_insert_command;
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Lisp_Object Qforward_char;
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Lisp_Object Qbackward_char;
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/* read_key_sequence stores here the command definition of the
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key sequence that it reads. */
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Lisp_Object read_key_sequence_cmd;
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/* Form to evaluate (if non-nil) when Emacs is started. */
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Lisp_Object Vtop_level;
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/* User-supplied string to translate input characters through. */
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Lisp_Object Vkeyboard_translate_table;
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/* Keymap mapping ASCII function key sequences onto their preferred forms. */
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extern Lisp_Object Vfunction_key_map;
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/* File in which we write all commands we read. */
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FILE *dribble;
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/* Nonzero if input is available. */
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int input_pending;
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/* Nonzero if should obey 0200 bit in input chars as "Meta". */
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int meta_key;
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extern char *pending_malloc_warning;
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/* Circular buffer for pre-read keyboard input. */
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static struct input_event kbd_buffer[KBD_BUFFER_SIZE];
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/* Pointer to next available character in kbd_buffer.
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If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty.
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This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the
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next available char is in kbd_buffer[0]. */
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static struct input_event *kbd_fetch_ptr;
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/* Pointer to next place to store character in kbd_buffer. This
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may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next
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character should go in kbd_buffer[0]. */
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static struct input_event *kbd_store_ptr;
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/* The above pair of variables forms a "queue empty" flag. When we
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enqueue a non-hook event, we increment kbd_write_count. When we
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dequeue a non-hook event, we increment kbd_read_count. We say that
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there is input available iff the two counters are equal.
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Why not just have a flag set and cleared by the enqueuing and
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dequeuing functions? Such a flag could be screwed up by interrupts
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at inopportune times. */
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/* If this flag is non-zero, mouse movement events will appear in the
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input stream. If is zero, mouse movement will be ignored. */
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int do_mouse_tracking;
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/* The window system handling code should set this if the mouse has
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moved since the last call to the mouse_position_hook. Calling that
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hook should clear this. Code assumes that if this is set, it can
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call mouse_position_hook to get the promised position, so don't set
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it unless you're prepared to substantiate the claim! */
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int mouse_moved;
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/* True iff there is an event in kbd_buffer, or if mouse tracking is
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enabled and there is a new mouse position in the mouse movement
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buffer. Note that if this is false, that doesn't mean that there
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is readable input; all the events in the queue might be button-up
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events, and do_mouse_tracking might be off. */
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#define EVENT_QUEUES_EMPTY \
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((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved))
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/* Symbols to head events. */
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Lisp_Object Qmouse_movement;
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Lisp_Object Qvscrollbar_part;
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Lisp_Object Qvslider_part;
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Lisp_Object Qvthumbup_part;
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Lisp_Object Qvthumbdown_part;
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Lisp_Object Qhscrollbar_part;
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Lisp_Object Qhslider_part;
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Lisp_Object Qhthumbleft_part;
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Lisp_Object Qhthumbright_part;
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/* Symbols to denote kinds of events. */
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Lisp_Object Qfunction_key;
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Lisp_Object Qmouse_click;
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/* Lisp_Object Qmouse_movement; - also an event header */
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Lisp_Object Qscrollbar_click;
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/* Properties of event headers. */
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Lisp_Object Qevent_kind;
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Lisp_Object Qevent_unmodified;
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/* Symbols to use for non-text mouse positions. */
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Lisp_Object Qmode_line;
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Lisp_Object Qvertical_line;
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/* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt
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happens. */
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EMACS_TIME *input_available_clear_time;
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/* Nonzero means use SIGIO interrupts; zero means use CBREAK mode.
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Default is 1 if INTERRUPT_INPUT is defined. */
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int interrupt_input;
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/* Nonzero while interrupts are temporarily deferred during redisplay. */
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int interrupts_deferred;
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/* nonzero means use ^S/^Q for flow control. */
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int flow_control;
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/* Allow m- file to inhibit use of FIONREAD. */
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#ifdef BROKEN_FIONREAD
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#undef FIONREAD
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#endif
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/* We are unable to use interrupts if FIONREAD is not available,
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so flush SIGIO so we won't try. */
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#ifndef FIONREAD
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#ifdef SIGIO
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#undef SIGIO
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#endif
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#endif
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/* If we support X Windows, and won't get an interrupt when input
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arrives from the server, poll periodically so we can detect C-g. */
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#ifdef HAVE_X_WINDOWS
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#ifndef SIGIO
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#define POLL_FOR_INPUT
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#endif
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#endif
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/* Global variable declarations. */
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/* Function for init_keyboard to call with no args (if nonzero). */
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void (*keyboard_init_hook) ();
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static int read_avail_input ();
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static void get_input_pending ();
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/* > 0 if we are to echo keystrokes. */
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static int echo_keystrokes;
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/* Nonzero means echo each character as typed. */
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static int immediate_echo;
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/* The text we're echoing in the modeline - partial key sequences,
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usually. '\0'-terminated. */
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static char echobuf[100];
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/* Where to append more text to echobuf if we want to. */
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static char *echoptr;
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#define min(a,b) ((a)<(b)?(a):(b))
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#define max(a,b) ((a)>(b)?(a):(b))
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/* Install the string STR as the beginning of the string of echoing,
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so that it serves as a prompt for the next character.
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Also start echoing. */
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echo_prompt (str)
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char *str;
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{
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int len = strlen (str);
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if (len > sizeof echobuf - 4)
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len = sizeof echobuf - 4;
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bcopy (str, echobuf, len + 1);
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echoptr = echobuf + len;
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echo ();
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}
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/* Add C to the echo string, if echoing is going on.
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C can be a character, which is printed prettily ("M-C-x" and all that
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jazz), or a symbol, whose name is printed. */
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echo_char (c)
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Lisp_Object c;
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{
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extern char *push_key_description ();
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if (immediate_echo)
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{
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char *ptr = echoptr;
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if (ptr != echobuf)
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*ptr++ = ' ';
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/* If someone has passed us a composite event, use its head symbol. */
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if (EVENT_HAS_PARAMETERS (c))
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c = EVENT_HEAD (c);
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if (XTYPE (c) == Lisp_Int)
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{
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if (ptr - echobuf > sizeof echobuf - 6)
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return;
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ptr = push_key_description (c, ptr);
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}
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else if (XTYPE (c) == Lisp_Symbol)
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{
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struct Lisp_String *name = XSYMBOL (c)->name;
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if (((ptr - echobuf) + name->size + 4) > sizeof echobuf)
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return;
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bcopy (name->data, ptr, name->size);
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ptr += name->size;
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}
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if (echoptr == echobuf && c == help_char)
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{
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strcpy (ptr, " (Type ? for further options)");
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ptr += strlen (ptr);
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}
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*ptr = 0;
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echoptr = ptr;
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echo ();
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}
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}
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/* Temporarily add a dash to the end of the echo string if it's not
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empty, so that it serves as a mini-prompt for the very next character. */
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echo_dash ()
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{
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if (!immediate_echo && echoptr == echobuf)
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return;
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/* Put a dash at the end of the buffer temporarily,
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but make it go away when the next character is added. */
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echoptr[0] = '-';
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echoptr[1] = 0;
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echo ();
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}
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/* Display the current echo string, and begin echoing if not already
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doing so. */
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echo ()
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{
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if (!immediate_echo)
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{
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int i;
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immediate_echo = 1;
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for (i = 0; i < this_command_key_count; i++)
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echo_char (this_command_keys[i]);
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echo_dash ();
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}
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echoing = 1;
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message1 (echobuf);
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echoing = 0;
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if (waiting_for_input && !NILP (Vquit_flag))
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quit_throw_to_read_char ();
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}
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/* Turn off echoing, for the start of a new command. */
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cancel_echoing ()
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{
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immediate_echo = 0;
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echoptr = echobuf;
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||
}
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||
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/* Return the length of the current echo string. */
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||
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static int
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echo_length ()
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{
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return echoptr - echobuf;
|
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}
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||
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/* Truncate the current echo message to its first LEN chars.
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||
This and echo_char get used by read_key_sequence when the user
|
||
switches frames while entering a key sequence. */
|
||
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||
static void
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echo_truncate (len)
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int len;
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||
{
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echobuf[len] = '\0';
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echoptr = echobuf + strlen (echobuf);
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||
}
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||
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/* Functions for manipulating this_command_keys. */
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static void
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add_command_key (key)
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||
Lisp_Object key;
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||
{
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||
if (this_command_key_count == this_command_keys_size)
|
||
{
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||
this_command_keys_size *= 2;
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||
this_command_keys
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||
= (Lisp_Object *) xrealloc (this_command_keys,
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||
(this_command_keys_size
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||
* sizeof (Lisp_Object)));
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||
}
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||
this_command_keys[this_command_key_count++] = key;
|
||
}
|
||
|
||
Lisp_Object
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||
recursive_edit_1 ()
|
||
{
|
||
int count = specpdl_ptr - specpdl;
|
||
Lisp_Object val;
|
||
|
||
if (command_loop_level > 0)
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||
{
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||
specbind (Qstandard_output, Qt);
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||
specbind (Qstandard_input, Qt);
|
||
}
|
||
|
||
val = command_loop ();
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||
if (EQ (val, Qt))
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||
Fsignal (Qquit, Qnil);
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||
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||
unbind_to (count);
|
||
return Qnil;
|
||
}
|
||
|
||
/* When an auto-save happens, record the "time", and don't do again soon. */
|
||
record_auto_save ()
|
||
{
|
||
last_auto_save = num_nonmacro_input_chars;
|
||
}
|
||
|
||
Lisp_Object recursive_edit_unwind (), command_loop ();
|
||
|
||
DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "",
|
||
"Invoke the editor command loop recursively.\n\
|
||
To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\
|
||
that tells this function to return.\n\
|
||
Alternately, `(throw 'exit t)' makes this function signal an error.\n\
|
||
This function is called by the editor initialization to begin editing.")
|
||
()
|
||
{
|
||
int count = specpdl_ptr - specpdl;
|
||
Lisp_Object val;
|
||
|
||
command_loop_level++;
|
||
update_mode_lines = 1;
|
||
|
||
record_unwind_protect (recursive_edit_unwind,
|
||
(command_loop_level
|
||
&& current_buffer != XBUFFER (XWINDOW (selected_window)->buffer))
|
||
? Fcurrent_buffer ()
|
||
: Qnil);
|
||
recursive_edit_1 ();
|
||
return unbind_to (count, Qnil);
|
||
}
|
||
|
||
Lisp_Object
|
||
recursive_edit_unwind (buffer)
|
||
Lisp_Object buffer;
|
||
{
|
||
if (!NILP (buffer))
|
||
Fset_buffer (buffer);
|
||
|
||
command_loop_level--;
|
||
update_mode_lines = 1;
|
||
return Qnil;
|
||
}
|
||
|
||
Lisp_Object
|
||
cmd_error (data)
|
||
Lisp_Object data;
|
||
{
|
||
Lisp_Object errmsg, tail, errname, file_error;
|
||
Lisp_Object stream;
|
||
struct gcpro gcpro1;
|
||
int i;
|
||
|
||
Vquit_flag = Qnil;
|
||
Vinhibit_quit = Qt;
|
||
Vstandard_output = Qt;
|
||
Vstandard_input = Qt;
|
||
Vexecuting_macro = Qnil;
|
||
echo_area_glyphs = 0;
|
||
|
||
/* If the window system or terminal frame hasn't been initialized
|
||
yet, or we're not interactive, it's best to dump this message out
|
||
to stderr and exit. */
|
||
if (! FRAME_MESSAGE_BUF (selected_frame)
|
||
|| noninteractive)
|
||
stream = Qexternal_debugging_output;
|
||
else
|
||
{
|
||
Fdiscard_input ();
|
||
bitch_at_user ();
|
||
stream = Qt;
|
||
}
|
||
|
||
errname = Fcar (data);
|
||
|
||
if (EQ (errname, Qerror))
|
||
{
|
||
data = Fcdr (data);
|
||
if (!CONSP (data)) data = Qnil;
|
||
errmsg = Fcar (data);
|
||
file_error = Qnil;
|
||
}
|
||
else
|
||
{
|
||
errmsg = Fget (errname, Qerror_message);
|
||
file_error = Fmemq (Qfile_error,
|
||
Fget (errname, Qerror_conditions));
|
||
}
|
||
|
||
/* Print an error message including the data items.
|
||
This is done by printing it into a scratch buffer
|
||
and then making a copy of the text in the buffer. */
|
||
|
||
if (!CONSP (data)) data = Qnil;
|
||
tail = Fcdr (data);
|
||
GCPRO1 (tail);
|
||
|
||
/* For file-error, make error message by concatenating
|
||
all the data items. They are all strings. */
|
||
if (!NILP (file_error) && !NILP (tail))
|
||
errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr;
|
||
|
||
if (XTYPE (errmsg) == Lisp_String)
|
||
Fprinc (errmsg, stream);
|
||
else
|
||
write_string_1 ("peculiar error", -1, stream);
|
||
|
||
for (i = 0; CONSP (tail); tail = Fcdr (tail), i++)
|
||
{
|
||
write_string_1 (i ? ", " : ": ", 2, stream);
|
||
if (!NILP (file_error))
|
||
Fprinc (Fcar (tail), stream);
|
||
else
|
||
Fprin1 (Fcar (tail), stream);
|
||
}
|
||
UNGCPRO;
|
||
|
||
/* If the window system or terminal frame hasn't been initialized
|
||
yet, or we're in -batch mode, this error should cause Emacs to exit. */
|
||
if (! FRAME_MESSAGE_BUF (selected_frame)
|
||
|| noninteractive)
|
||
{
|
||
Fterpri (stream);
|
||
Fkill_emacs (make_number (-1));
|
||
}
|
||
|
||
Vquit_flag = Qnil;
|
||
|
||
Vinhibit_quit = Qnil;
|
||
return make_number (0);
|
||
}
|
||
|
||
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)
|
||
{
|
||
return internal_catch (Qexit, command_loop_2, Qnil);
|
||
}
|
||
else
|
||
while (1)
|
||
{
|
||
internal_catch (Qtop_level, top_level_1, Qnil);
|
||
internal_catch (Qtop_level, command_loop_2, 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 cmd_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, "",
|
||
"Exit all recursive editing levels.")
|
||
()
|
||
{
|
||
Fthrow (Qtop_level, Qnil);
|
||
}
|
||
|
||
DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "",
|
||
"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");
|
||
}
|
||
|
||
DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "",
|
||
"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");
|
||
}
|
||
|
||
/* This is the actual command reading loop,
|
||
sans error-handling encapsulation. */
|
||
|
||
Lisp_Object Fcommand_execute ();
|
||
static int read_key_sequence ();
|
||
|
||
Lisp_Object
|
||
command_loop_1 ()
|
||
{
|
||
Lisp_Object cmd;
|
||
int lose;
|
||
int nonundocount;
|
||
Lisp_Object keybuf[30];
|
||
int i;
|
||
int no_redisplay;
|
||
int no_direct;
|
||
|
||
Vprefix_arg = Qnil;
|
||
waiting_for_input = 0;
|
||
cancel_echoing ();
|
||
|
||
/* Don't clear out last_command at the beginning of a macro. */
|
||
if (XTYPE (Vexecuting_macro) != Lisp_String)
|
||
last_command = Qt;
|
||
|
||
nonundocount = 0;
|
||
no_redisplay = 0;
|
||
this_command_key_count = 0;
|
||
|
||
while (1)
|
||
{
|
||
/* Install chars successfully executed in kbd macro. */
|
||
|
||
if (defining_kbd_macro && NILP (Vprefix_arg))
|
||
finalize_kbd_macro_chars ();
|
||
|
||
/* 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;
|
||
|
||
/* If minibuffer on and echo area in use,
|
||
wait 2 sec and redraw minibufer. */
|
||
|
||
if (minibuf_level && echo_area_glyphs)
|
||
{
|
||
/* Bind inhibit-quit to t so that C-g gets read in
|
||
rather than quitting back to the minibuffer. */
|
||
int count = specpdl_ptr - specpdl;
|
||
specbind (Qinhibit_quit, Qt);
|
||
Fsit_for (make_number (2), Qnil, Qnil);
|
||
unbind_to (count);
|
||
|
||
echo_area_glyphs = 0;
|
||
no_direct = 1;
|
||
if (!NILP (Vquit_flag))
|
||
{
|
||
Vquit_flag = Qnil;
|
||
unread_command_char = make_number (quit_char);
|
||
}
|
||
}
|
||
|
||
#ifdef C_ALLOCA
|
||
alloca (0); /* Cause a garbage collection now */
|
||
/* Since we can free the most stuff here. */
|
||
#endif /* C_ALLOCA */
|
||
|
||
/* Read next key sequence; i gets its length. */
|
||
i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0);
|
||
|
||
++num_input_keys;
|
||
|
||
#ifdef MULTI_FRAME
|
||
/* Select the frame that the key sequence came from. */
|
||
if (XTYPE (Vlast_event_frame) == Lisp_Frame
|
||
&& XFRAME (Vlast_event_frame) != selected_frame)
|
||
Fselect_frame (Vlast_event_frame, Qnil);
|
||
#endif
|
||
|
||
/* 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. */
|
||
|
||
last_command_char = keybuf[i - 1];
|
||
|
||
cmd = read_key_sequence_cmd;
|
||
if (!NILP (Vexecuting_macro))
|
||
{
|
||
if (!NILP (Vquit_flag))
|
||
{
|
||
Vexecuting_macro = Qt;
|
||
QUIT; /* Make some noise. */
|
||
/* Will return since macro now empty. */
|
||
}
|
||
}
|
||
|
||
/* Do redisplay processing after this command except in special
|
||
cases identified below that set no_redisplay to 1. */
|
||
no_redisplay = 0;
|
||
|
||
/* Execute the command. */
|
||
|
||
if (NILP (cmd))
|
||
{
|
||
/* nil means key is undefined. */
|
||
bitch_at_user ();
|
||
defining_kbd_macro = 0;
|
||
update_mode_lines = 1;
|
||
Vprefix_arg = Qnil;
|
||
}
|
||
else
|
||
{
|
||
this_command = cmd;
|
||
if (NILP (Vprefix_arg) && ! no_direct)
|
||
{
|
||
/* Recognize some common commands in common situations and
|
||
do them directly. */
|
||
if (EQ (cmd, Qforward_char) && point < ZV)
|
||
{
|
||
struct Lisp_Vector *dp
|
||
= window_display_table (XWINDOW (selected_window));
|
||
lose = FETCH_CHAR (point);
|
||
SET_PT (point + 1);
|
||
if (((dp == 0 && lose >= 040 && lose < 0177)
|
||
||
|
||
(dp && (XTYPE (dp->contents[lose]) != Lisp_String
|
||
|| XSTRING (dp->contents[lose])->size == sizeof (GLYPH))))
|
||
&& (XFASTINT (XWINDOW (selected_window)->last_modified)
|
||
>= MODIFF)
|
||
&& (XFASTINT (XWINDOW (selected_window)->last_point)
|
||
== point - 1)
|
||
&& !windows_or_buffers_changed
|
||
&& EQ (current_buffer->selective_display, Qnil)
|
||
&& !detect_input_pending ()
|
||
&& NILP (Vexecuting_macro))
|
||
no_redisplay = direct_output_forward_char (1);
|
||
goto directly_done;
|
||
}
|
||
else if (EQ (cmd, Qbackward_char) && point > BEGV)
|
||
{
|
||
struct Lisp_Vector *dp
|
||
= window_display_table (XWINDOW (selected_window));
|
||
SET_PT (point - 1);
|
||
lose = FETCH_CHAR (point);
|
||
if (((dp == 0 && lose >= 040 && lose < 0177)
|
||
||
|
||
(dp && (XTYPE (dp->contents[lose]) != Lisp_String
|
||
|| XSTRING (dp->contents[lose])->size == sizeof (GLYPH))))
|
||
&& (XFASTINT (XWINDOW (selected_window)->last_modified)
|
||
>= MODIFF)
|
||
&& (XFASTINT (XWINDOW (selected_window)->last_point)
|
||
== point + 1)
|
||
&& !windows_or_buffers_changed
|
||
&& EQ (current_buffer->selective_display, Qnil)
|
||
&& !detect_input_pending ()
|
||
&& NILP (Vexecuting_macro))
|
||
no_redisplay = direct_output_forward_char (-1);
|
||
goto directly_done;
|
||
}
|
||
else if (EQ (cmd, Qself_insert_command)
|
||
/* Try this optimization only on ascii keystrokes. */
|
||
&& XTYPE (last_command_char) == Lisp_Int)
|
||
{
|
||
unsigned char c = XINT (last_command_char);
|
||
|
||
if (NILP (Vexecuting_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_point)
|
||
!= point)
|
||
|| MODIFF <= current_buffer->save_modified
|
||
|| windows_or_buffers_changed
|
||
|| !EQ (current_buffer->selective_display, Qnil)
|
||
|| detect_input_pending ()
|
||
|| !NILP (Vexecuting_macro);
|
||
if (internal_self_insert (c, 0))
|
||
{
|
||
lose = 1;
|
||
nonundocount = 0;
|
||
}
|
||
if (!lose &&
|
||
(point == ZV || FETCH_CHAR (point) == '\n'))
|
||
{
|
||
struct Lisp_Vector *dp
|
||
= window_display_table (XWINDOW (selected_window));
|
||
|
||
if (dp == 0 || XTYPE (dp->contents[c]) != Lisp_String)
|
||
no_redisplay = direct_output_for_insert (c);
|
||
else if (XSTRING (dp->contents[c])->size
|
||
== sizeof (GLYPH))
|
||
no_redisplay =
|
||
direct_output_for_insert (*(GLYPH *)XSTRING (dp->contents[c])->data);
|
||
}
|
||
goto directly_done;
|
||
}
|
||
}
|
||
|
||
/* Here for a command that isn't executed directly */
|
||
|
||
nonundocount = 0;
|
||
if (NILP (Vprefix_arg))
|
||
Fundo_boundary ();
|
||
Fcommand_execute (cmd, Qnil);
|
||
|
||
}
|
||
directly_done: ;
|
||
|
||
/* If there is a prefix argument,
|
||
1) We don't want last_command to be ``universal-argument''
|
||
(that would be dumb), so don't set last_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 (NILP (Vprefix_arg))
|
||
{
|
||
last_command = this_command;
|
||
cancel_echoing ();
|
||
this_command_key_count = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Number of seconds between polling for input. */
|
||
int polling_period;
|
||
|
||
/* Nonzero means polling for input is temporarily suppresed. */
|
||
int poll_suppress_count;
|
||
|
||
#ifdef POLL_FOR_INPUT
|
||
int polling_for_input;
|
||
|
||
/* Handle an alarm once each second and read pending input
|
||
so as to handle a C-g if it comces in. */
|
||
|
||
SIGTYPE
|
||
input_poll_signal ()
|
||
{
|
||
#ifdef HAVE_X_WINDOWS
|
||
extern int x_input_blocked;
|
||
if (x_input_blocked == 0)
|
||
#endif
|
||
if (!waiting_for_input)
|
||
read_avail_input (0);
|
||
signal (SIGALRM, input_poll_signal);
|
||
alarm (polling_period);
|
||
}
|
||
|
||
#endif
|
||
|
||
/* Begin signals to poll for input, if they are appropriate.
|
||
This function is called unconditionally from various places. */
|
||
|
||
start_polling ()
|
||
{
|
||
#ifdef POLL_FOR_INPUT
|
||
if (read_socket_hook)
|
||
{
|
||
poll_suppress_count--;
|
||
if (poll_suppress_count == 0)
|
||
{
|
||
signal (SIGALRM, input_poll_signal);
|
||
polling_for_input = 1;
|
||
alarm (polling_period);
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Turn off polling. */
|
||
|
||
stop_polling ()
|
||
{
|
||
#ifdef POLL_FOR_INPUT
|
||
if (read_socket_hook)
|
||
{
|
||
if (poll_suppress_count == 0)
|
||
{
|
||
polling_for_input = 0;
|
||
alarm (0);
|
||
}
|
||
poll_suppress_count++;
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Input of single characters from keyboard */
|
||
|
||
Lisp_Object print_help ();
|
||
static Lisp_Object kbd_buffer_get_event ();
|
||
|
||
/* 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.
|
||
|
||
If we use a mouse menu to read the input, we store 1 into *USED_MOUSE_MENU.
|
||
Otherwise we store 0 there. */
|
||
|
||
Lisp_Object
|
||
read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu)
|
||
int commandflag;
|
||
int nmaps;
|
||
Lisp_Object *maps;
|
||
Lisp_Object prev_event;
|
||
int *used_mouse_menu;
|
||
{
|
||
register Lisp_Object c;
|
||
int count;
|
||
jmp_buf save_jump;
|
||
|
||
if (!NILP (unread_command_char))
|
||
{
|
||
c = unread_command_char;
|
||
unread_command_char = Qnil;
|
||
|
||
if (this_command_key_count == 0)
|
||
goto reread_first;
|
||
else
|
||
goto reread;
|
||
}
|
||
|
||
if (!NILP (Vexecuting_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 Vlast_event_frame set to whereever the last real event
|
||
came from. Normally, command_loop_1 selects
|
||
Vlast_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 = Qmacro;
|
||
|
||
if (executing_macro_index >= Flength (Vexecuting_macro))
|
||
{
|
||
XSET (c, Lisp_Int, -1);
|
||
return c;
|
||
}
|
||
|
||
c = Faref (Vexecuting_macro, make_number (executing_macro_index));
|
||
executing_macro_index++;
|
||
|
||
goto from_macro;
|
||
}
|
||
|
||
/* Save outer setjmp data, in case called recursively. */
|
||
save_getcjmp (save_jump);
|
||
|
||
stop_polling ();
|
||
|
||
if (commandflag >= 0 && !input_pending && !detect_input_pending ())
|
||
redisplay ();
|
||
|
||
if (_setjmp (getcjmp))
|
||
{
|
||
XSET (c, Lisp_Int, quit_char);
|
||
#ifdef MULTI_FRAME
|
||
XSET (Vlast_event_frame, Lisp_Frame, selected_frame);
|
||
#endif
|
||
|
||
goto non_reread;
|
||
}
|
||
|
||
/* Message turns off echoing unless more keystrokes turn it on again. */
|
||
if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf)
|
||
cancel_echoing ();
|
||
else
|
||
/* If already echoing, continue. */
|
||
echo_dash ();
|
||
|
||
/* If in middle of key sequence and minibuffer not active,
|
||
start echoing if enough time elapses. */
|
||
if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0
|
||
&& echo_keystrokes > 0
|
||
&& (echo_area_glyphs == 0 || *echo_area_glyphs == 0))
|
||
{
|
||
Lisp_Object tem0;
|
||
|
||
/* 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 (XTYPE (prev_event) == Lisp_Cons)
|
||
echo ();
|
||
else
|
||
{
|
||
tem0 = sit_for (echo_keystrokes, 0, 1, 1);
|
||
if (EQ (tem0, Qt))
|
||
echo ();
|
||
}
|
||
}
|
||
|
||
/* Maybe auto save due to number of keystrokes or idle time. */
|
||
|
||
if (commandflag != 0
|
||
&& auto_save_interval > 0
|
||
&& num_nonmacro_input_chars - last_auto_save > max (auto_save_interval, 20)
|
||
&& !detect_input_pending ())
|
||
{
|
||
jmp_buf temp;
|
||
save_getcjmp (temp);
|
||
Fdo_auto_save (Qnil, Qnil);
|
||
restore_getcjmp (temp);
|
||
}
|
||
|
||
/* Try reading a character via menu prompting.
|
||
Try this before the sit-for, because the sit-for
|
||
would do the wrong thing if we are supposed to do
|
||
menu prompting. */
|
||
c = Qnil;
|
||
if (INTERACTIVE && !NILP (prev_event))
|
||
c = read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu);
|
||
|
||
/* Slow down auto saves logarithmically in size of current buffer,
|
||
and garbage collect while we're at it. */
|
||
if (NILP (c))
|
||
{
|
||
int delay_level, buffer_size;
|
||
|
||
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_chars > last_auto_save
|
||
&& XTYPE (Vauto_save_timeout) == Lisp_Int
|
||
&& XINT (Vauto_save_timeout) > 0)
|
||
{
|
||
Lisp_Object tem0;
|
||
int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4;
|
||
tem0 = sit_for (delay, 0, 1, 1);
|
||
if (EQ (tem0, Qt))
|
||
{
|
||
jmp_buf temp;
|
||
save_getcjmp (temp);
|
||
Fdo_auto_save (Qnil, Qnil);
|
||
restore_getcjmp (temp);
|
||
|
||
/* 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 ()
|
||
&& consing_since_gc > gc_cons_threshold / 2)
|
||
Fgarbage_collect ();
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Actually read a character, waiting if necessary. */
|
||
if (NILP (c))
|
||
c = kbd_buffer_get_event ();
|
||
|
||
if (NILP (c))
|
||
abort (); /* Don't think this can happen. */
|
||
|
||
/* Terminate Emacs in batch mode if at eof. */
|
||
if (noninteractive && XTYPE (c) == Lisp_Int && XINT (c) < 0)
|
||
Fkill_emacs (make_number (1));
|
||
|
||
non_reread:
|
||
|
||
restore_getcjmp (save_jump);
|
||
|
||
start_polling ();
|
||
|
||
echo_area_glyphs = 0;
|
||
|
||
/* Handle things that only apply to characters. */
|
||
if (XTYPE (c) == Lisp_Int)
|
||
{
|
||
/* If kbd_buffer_get_event gave us an EOF, return that. */
|
||
if (XINT (c) < 0)
|
||
return c;
|
||
|
||
/* Strip the high bits, and maybe the meta bit too. */
|
||
XSETINT (c, c & (meta_key ? 0377 : 0177));
|
||
|
||
if (XTYPE (Vkeyboard_translate_table) == Lisp_String
|
||
&& XSTRING (Vkeyboard_translate_table)->size > XINT (c))
|
||
XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[c]);
|
||
}
|
||
|
||
total_keys++;
|
||
XVECTOR (recent_keys)->contents[recent_keys_index] = c;
|
||
if (++recent_keys_index >= NUM_RECENT_KEYS)
|
||
recent_keys_index = 0;
|
||
|
||
/* Write c to the dribble file. If c is a lispy event, write
|
||
the event's symbol to the dribble file, in <brackets>. Bleaugh.
|
||
If you, dear reader, have a better idea, you've got the source. :-) */
|
||
if (dribble)
|
||
{
|
||
if (XTYPE (c) == Lisp_Int)
|
||
putc (c, dribble);
|
||
else
|
||
{
|
||
Lisp_Object dribblee = c;
|
||
|
||
/* If it's a structured event, take the event header. */
|
||
if (EVENT_HAS_PARAMETERS (dribblee))
|
||
dribblee = EVENT_HEAD (dribblee);
|
||
|
||
if (XTYPE (c) == Lisp_Symbol)
|
||
{
|
||
putc ('<', dribble);
|
||
fwrite (XSYMBOL (c)->name->data, sizeof (char),
|
||
XSYMBOL (c)->name->size,
|
||
dribble);
|
||
putc ('>', dribble);
|
||
}
|
||
}
|
||
|
||
fflush (dribble);
|
||
}
|
||
|
||
store_kbd_macro_char (c);
|
||
|
||
num_nonmacro_input_chars++;
|
||
|
||
from_macro:
|
||
reread_first:
|
||
echo_char (c);
|
||
|
||
/* Record this character as part of the current key. */
|
||
add_command_key (c);
|
||
|
||
/* Re-reading in the middle of a command */
|
||
reread:
|
||
last_input_char = c;
|
||
num_input_chars++;
|
||
|
||
/* Process the help character specially if enabled */
|
||
if (EQ (c, help_char) && !NILP (Vhelp_form))
|
||
{
|
||
Lisp_Object tem0;
|
||
count = specpdl_ptr - specpdl;
|
||
|
||
record_unwind_protect (Fset_window_configuration,
|
||
Fcurrent_window_configuration (Qnil));
|
||
|
||
tem0 = Feval (Vhelp_form);
|
||
if (XTYPE (tem0) == Lisp_String)
|
||
internal_with_output_to_temp_buffer ("*Help*", print_help, tem0);
|
||
|
||
cancel_echoing ();
|
||
c = read_char (0);
|
||
/* Remove the help from the frame */
|
||
unbind_to (count, Qnil);
|
||
redisplay ();
|
||
if (EQ (c, make_number (040)))
|
||
{
|
||
cancel_echoing ();
|
||
c = read_char (0, 0, 0, Qnil, 0);
|
||
}
|
||
}
|
||
|
||
return c;
|
||
}
|
||
|
||
Lisp_Object
|
||
print_help (object)
|
||
Lisp_Object object;
|
||
{
|
||
Fprinc (object, Qnil);
|
||
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. */
|
||
|
||
save_getcjmp (temp)
|
||
jmp_buf temp;
|
||
{
|
||
bcopy (getcjmp, temp, sizeof getcjmp);
|
||
}
|
||
|
||
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.
|
||
mouse_moved indicates when the mouse has moved again, and
|
||
*mouse_position_hook provides the mouse position. */
|
||
|
||
/* Set this for debugging, to have a way to get out */
|
||
int stop_character;
|
||
|
||
extern int frame_garbaged;
|
||
|
||
/* Return true iff 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 ()
|
||
{
|
||
struct input_event *ep;
|
||
|
||
if (EVENT_QUEUES_EMPTY)
|
||
return 0;
|
||
|
||
if (do_mouse_tracking)
|
||
return 1;
|
||
|
||
/* Mouse tracking is disabled, so we need to actually scan the
|
||
input queue to see if any events are currently readable. */
|
||
for (ep = kbd_fetch_ptr; ep != kbd_store_ptr; ep++)
|
||
{
|
||
if (ep == kbd_buffer + KBD_BUFFER_SIZE)
|
||
ep = kbd_buffer;
|
||
|
||
/* Skip button-up events. */
|
||
if ((ep->kind == mouse_click || ep->kind == scrollbar_click)
|
||
&& (ep->modifiers & up_modifier))
|
||
continue;
|
||
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* 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;
|
||
{
|
||
if (! XFASTINT (old_value))
|
||
{
|
||
do_mouse_tracking = 0;
|
||
|
||
/* 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 ())
|
||
{
|
||
redisplay_preserve_echo_area ();
|
||
get_input_pending (&input_pending);
|
||
}
|
||
}
|
||
}
|
||
|
||
DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0,
|
||
"Evaluate BODY with mouse movement and button release events enabled.\n\
|
||
Within a `track-mouse', mouse motion and button releases generate input\n\
|
||
events that you can read with `read-event'.\n\
|
||
Normally, these occurrences don't generate events.")
|
||
(args)
|
||
Lisp_Object args;
|
||
{
|
||
int count = specpdl_ptr - specpdl;
|
||
Lisp_Object val;
|
||
|
||
XSET (val, Lisp_Int, do_mouse_tracking);
|
||
record_unwind_protect (tracking_off, val);
|
||
|
||
do_mouse_tracking = 1;
|
||
|
||
val = Fprogn (args);
|
||
return unbind_to (count, val);
|
||
}
|
||
|
||
/* Store an event obtained at interrupt level into kbd_buffer, fifo */
|
||
|
||
void
|
||
kbd_buffer_store_event (event)
|
||
register struct input_event *event;
|
||
{
|
||
if (event->kind == no_event)
|
||
abort ();
|
||
|
||
if (event->kind == ascii_keystroke)
|
||
{
|
||
register int c = XFASTINT (event->code) & 0377;
|
||
|
||
if (c == quit_char
|
||
|| ((c == (0200 | quit_char)) && !meta_key))
|
||
{
|
||
extern SIGTYPE interrupt_signal ();
|
||
|
||
#ifdef MULTI_FRAME
|
||
/* If this results in a quit_char being returned to Emacs as
|
||
input, set last-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. */
|
||
Vlast_event_frame = FRAME_FOCUS_FRAME (event->frame);
|
||
#endif
|
||
|
||
last_event_timestamp = event->timestamp;
|
||
interrupt_signal ();
|
||
return;
|
||
}
|
||
|
||
if (c && c == stop_character)
|
||
{
|
||
sys_suspend ();
|
||
return;
|
||
}
|
||
|
||
XSET (event->code, Lisp_Int, c);
|
||
}
|
||
|
||
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->kind = event->kind;
|
||
kbd_store_ptr->code = event->code;
|
||
kbd_store_ptr->part = event->part;
|
||
kbd_store_ptr->frame = event->frame;
|
||
kbd_store_ptr->modifiers = event->modifiers;
|
||
kbd_store_ptr->x = event->x;
|
||
kbd_store_ptr->y = event->y;
|
||
kbd_store_ptr->timestamp = event->timestamp;
|
||
|
||
kbd_store_ptr++;
|
||
}
|
||
}
|
||
|
||
static Lisp_Object make_lispy_event ();
|
||
static Lisp_Object make_lispy_movement ();
|
||
static Lisp_Object modify_event_symbol ();
|
||
|
||
static Lisp_Object
|
||
kbd_buffer_get_event ()
|
||
{
|
||
register int c;
|
||
Lisp_Object obj;
|
||
|
||
if (noninteractive)
|
||
{
|
||
c = getchar ();
|
||
XSET (obj, Lisp_Int, c);
|
||
return obj;
|
||
}
|
||
|
||
/* Wait until there is input available. */
|
||
for (;;)
|
||
{
|
||
|
||
/* Process or toss any events that we don't want to return as
|
||
input. The fact that we remove undesirable events here
|
||
allows us to use EVENT_QUEUES_EMPTY in the rest of this loop. */
|
||
if (! do_mouse_tracking)
|
||
while (kbd_fetch_ptr != kbd_store_ptr)
|
||
{
|
||
if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE)
|
||
kbd_fetch_ptr = kbd_buffer;
|
||
|
||
if (kbd_fetch_ptr->kind == mouse_click
|
||
|| kbd_fetch_ptr->kind == scrollbar_click)
|
||
{
|
||
if ((kbd_fetch_ptr->modifiers & up_modifier) == 0)
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
|
||
kbd_fetch_ptr++;
|
||
}
|
||
|
||
if (!EVENT_QUEUES_EMPTY)
|
||
break;
|
||
|
||
/* 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 (EVENT_QUEUES_EMPTY)
|
||
{
|
||
Lisp_Object minus_one;
|
||
|
||
XSET (minus_one, Lisp_Int, -1);
|
||
wait_reading_process_input (0, 0, minus_one, 1);
|
||
|
||
if (!interrupt_input && EVENT_QUEUES_EMPTY)
|
||
{
|
||
read_avail_input (0);
|
||
}
|
||
}
|
||
#endif /* not VMS */
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE)
|
||
kbd_fetch_ptr = kbd_buffer;
|
||
|
||
#ifdef MULTI_FRAME
|
||
XSET (Vlast_event_frame, Lisp_Frame,
|
||
XFRAME (FRAME_FOCUS_FRAME (kbd_fetch_ptr->frame)));
|
||
#endif
|
||
|
||
last_event_timestamp = kbd_fetch_ptr->timestamp;
|
||
obj = make_lispy_event (kbd_fetch_ptr);
|
||
kbd_fetch_ptr->kind = no_event;
|
||
kbd_fetch_ptr++;
|
||
if (XTYPE (obj) == Lisp_Int)
|
||
XSET (obj, Lisp_Int, XINT (obj) & (meta_key ? 0377 : 0177));
|
||
}
|
||
else if (do_mouse_tracking && mouse_moved)
|
||
{
|
||
FRAME_PTR frame;
|
||
Lisp_Object x, y;
|
||
unsigned long time;
|
||
|
||
(*mouse_position_hook) (&frame, &x, &y, &time);
|
||
#ifdef MULTI_FRAME
|
||
XSET (Vlast_event_frame, Lisp_Frame, frame);
|
||
#endif
|
||
|
||
obj = make_lispy_movement (frame, x, y, time);
|
||
}
|
||
else
|
||
/* We were promised by the above while loop that there was
|
||
something for us to read! */
|
||
abort ();
|
||
|
||
input_pending = readable_events ();
|
||
|
||
return (obj);
|
||
}
|
||
|
||
/* Caches for modify_event_symbol. */
|
||
static Lisp_Object func_key_syms;
|
||
static Lisp_Object mouse_syms;
|
||
|
||
/* You'll notice that this table is arranged to be conveniently
|
||
indexed by X Windows keysym values. */
|
||
static char *lispy_function_keys[] =
|
||
{
|
||
/* X Keysym value */
|
||
|
||
"home", /* 0xff50 */ /* IsCursorKey */
|
||
"left",
|
||
"up",
|
||
"right",
|
||
"down",
|
||
"prior",
|
||
"next",
|
||
"end",
|
||
"begin",
|
||
0, /* 0xff59 */
|
||
0, 0, 0, 0, 0, 0,
|
||
"select", /* 0xff60 */ /* IsMiscFunctionKey */
|
||
"print",
|
||
"execute",
|
||
"insert",
|
||
0, /* 0xff64 */
|
||
"undo",
|
||
"redo",
|
||
"menu",
|
||
"find",
|
||
"cancel",
|
||
"help",
|
||
"break", /* 0xff6b */
|
||
|
||
/* Here are some keys found mostly on HP keyboards. The X event
|
||
handling code will strip bit 29, which flags vendor-specific
|
||
keysyms. */
|
||
"reset", /* 0x1000ff6c */
|
||
"system",
|
||
"user",
|
||
"clearline",
|
||
"insertline",
|
||
"deleteline",
|
||
"insertchar",
|
||
"deletechar",
|
||
"backtab",
|
||
"kp_backtab", /* 0x1000ff75 */
|
||
0, /* 0xff76 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff7f */
|
||
"kp-space", /* 0xff80 */ /* IsKeypadKey */
|
||
0, 0, 0, 0, 0, 0, 0, 0,
|
||
"kp-tab", /* 0xff89 */
|
||
0, 0, 0,
|
||
"kp-enter", /* 0xff8d */
|
||
0, 0, 0,
|
||
"kp-f1", /* 0xff91 */
|
||
"kp-f2",
|
||
"kp-f3",
|
||
"kp-f4",
|
||
0, /* 0xff95 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
"kp-multiply", /* 0xffaa */
|
||
"kp-add",
|
||
"kp-separator",
|
||
"kp-subtract",
|
||
"kp-decimal",
|
||
"kp-divide", /* 0xffaf */
|
||
"kp-0", /* 0xffb0 */
|
||
"kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9",
|
||
0, /* 0xffba */
|
||
0, 0,
|
||
"kp-equal", /* 0xffbd */
|
||
"f1", /* 0xffbe */ /* IsFunctionKey */
|
||
"f2", "f3", "f4",
|
||
"f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12",
|
||
"f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20",
|
||
"f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28",
|
||
"f29", "f30", "f31", "f32", "f33", "f34", "f35" /* 0xffe0 */
|
||
};
|
||
|
||
static char *lispy_mouse_names[] =
|
||
{
|
||
"mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5"
|
||
};
|
||
|
||
/* Given a struct input_event, build the lisp event which represents
|
||
it. If EVENT is 0, build a mouse movement event from the mouse
|
||
movement buffer, which should have a movement event in it. */
|
||
|
||
static Lisp_Object
|
||
make_lispy_event (event)
|
||
struct input_event *event;
|
||
{
|
||
#ifdef SWITCH_ENUM_BUG
|
||
switch ((int) event->kind)
|
||
#else
|
||
switch (event->kind)
|
||
#endif
|
||
{
|
||
|
||
/* A simple keystroke. */
|
||
case ascii_keystroke:
|
||
return event->code;
|
||
break;
|
||
|
||
/* A function key. The symbol may need to have modifier prefixes
|
||
tacked onto it. */
|
||
case non_ascii_keystroke:
|
||
return modify_event_symbol (XFASTINT (event->code), event->modifiers,
|
||
Qfunction_key,
|
||
lispy_function_keys, &func_key_syms,
|
||
(sizeof (lispy_function_keys)
|
||
/ sizeof (lispy_function_keys[0])));
|
||
break;
|
||
|
||
/* A mouse click - build a list of the relevant information. */
|
||
case mouse_click:
|
||
{
|
||
int part;
|
||
Lisp_Object window =
|
||
window_from_coordinates (event->frame,
|
||
XINT (event->x), XINT (event->y),
|
||
&part);
|
||
Lisp_Object posn;
|
||
|
||
if (XTYPE (window) != Lisp_Window)
|
||
posn = Qnil;
|
||
else
|
||
{
|
||
XSETINT (event->x, (XINT (event->x)
|
||
- XINT (XWINDOW (window)->left)));
|
||
XSETINT (event->y, (XINT (event->y)
|
||
- XINT (XWINDOW (window)->top)));
|
||
|
||
if (part == 1)
|
||
posn = Qmode_line;
|
||
else if (part == 2)
|
||
posn = Qvertical_line;
|
||
else
|
||
XSET (posn, Lisp_Int,
|
||
buffer_posn_from_coords (XWINDOW (window),
|
||
XINT (event->x),
|
||
XINT (event->y)));
|
||
}
|
||
|
||
return Fcons (modify_event_symbol (XFASTINT (event->code) - 1,
|
||
event->modifiers,
|
||
Qmouse_click,
|
||
lispy_mouse_names, &mouse_syms,
|
||
(sizeof (lispy_mouse_names)
|
||
/ sizeof (lispy_mouse_names[0]))),
|
||
Fcons (window,
|
||
Fcons (posn,
|
||
Fcons (Fcons (event->x, event->y),
|
||
Fcons (make_number
|
||
(event->timestamp),
|
||
Qnil)))));
|
||
}
|
||
|
||
/* A scrollbar click. Build a list containing the relevant
|
||
information. */
|
||
case scrollbar_click:
|
||
{
|
||
Lisp_Object button
|
||
= modify_event_symbol (XFASTINT (event->code) - 1,
|
||
event->modifiers,
|
||
Qmouse_click,
|
||
lispy_mouse_names, &mouse_syms,
|
||
(sizeof (lispy_mouse_names)
|
||
/ sizeof (lispy_mouse_names[0])));
|
||
return Fcons (event->part,
|
||
Fcons (FRAME_SELECTED_WINDOW (event->frame),
|
||
Fcons (button,
|
||
Fcons (Fcons (event->x, event->y),
|
||
Fcons (make_number
|
||
(event->timestamp),
|
||
Qnil)))));
|
||
}
|
||
|
||
/* The 'kind' field of the event is something we don't recognize. */
|
||
default:
|
||
abort();
|
||
}
|
||
}
|
||
|
||
static Lisp_Object
|
||
make_lispy_movement (frame, x, y, time)
|
||
FRAME_PTR frame;
|
||
Lisp_Object x, y;
|
||
unsigned long time;
|
||
{
|
||
Lisp_Object window;
|
||
int ix, iy;
|
||
Lisp_Object posn;
|
||
int part;
|
||
|
||
ix = XINT (x);
|
||
iy = XINT (y);
|
||
window = (frame
|
||
? window_from_coordinates (frame, ix, iy, &part)
|
||
: Qnil);
|
||
if (XTYPE (window) != Lisp_Window)
|
||
posn = Qnil;
|
||
else
|
||
{
|
||
ix -= XINT (XWINDOW (window)->left);
|
||
iy -= XINT (XWINDOW (window)->top);
|
||
if (part == 1)
|
||
posn = Qmode_line;
|
||
else if (part == 2)
|
||
posn = Qvertical_line;
|
||
else
|
||
XSET (posn, Lisp_Int, buffer_posn_from_coords (XWINDOW (window),
|
||
ix, iy));
|
||
}
|
||
|
||
XSETINT (x, ix);
|
||
XSETINT (y, iy);
|
||
return Fcons (Qmouse_movement,
|
||
Fcons (window,
|
||
Fcons (posn,
|
||
Fcons (Fcons (x, y),
|
||
Fcons (make_number (time), Qnil)))));
|
||
}
|
||
|
||
|
||
|
||
/* Place the written representation of MODIFIERS in BUF, '\0'-terminated,
|
||
and return its length. */
|
||
|
||
static int
|
||
format_modifiers (modifiers, buf)
|
||
int modifiers;
|
||
char *buf;
|
||
{
|
||
char *p = buf;
|
||
|
||
/* Events with the `up' modifier should always be turned into
|
||
click or drag events. */
|
||
if (modifiers & up_modifier)
|
||
abort ();
|
||
|
||
if (modifiers & alt_modifier) { *p++ = 'A'; *p++ = '-'; }
|
||
if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; }
|
||
if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; }
|
||
if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; }
|
||
if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; }
|
||
if (modifiers & super_modifier) { strcpy (p, "super-"); p += 6; }
|
||
if (modifiers & down_modifier) { strcpy (p, "down-"); p += 5; }
|
||
if (modifiers & drag_modifier) { strcpy (p, "drag-"); p += 5; }
|
||
*p = '\0';
|
||
|
||
return p - buf;
|
||
}
|
||
|
||
|
||
/* Given a symbol whose name begins with modifiers ("C-", "M-", etc),
|
||
return a symbol with the modifiers placed in the canonical order.
|
||
Canonical order is alphabetical, except for down and drag, which
|
||
always come last.
|
||
|
||
Fdefine_key calls this to make sure that (for example) C-M-foo
|
||
and M-C-foo end up being equivalent in the keymap. */
|
||
|
||
Lisp_Object
|
||
reorder_modifiers (symbol)
|
||
Lisp_Object symbol;
|
||
{
|
||
struct Lisp_String *name;
|
||
int i;
|
||
int modifiers;
|
||
int not_canonical;
|
||
|
||
CHECK_SYMBOL (symbol, 1);
|
||
|
||
modifiers = 0;
|
||
name = XSYMBOL (symbol)->name;
|
||
|
||
/* Special case for things with only one modifier, which is
|
||
(hopefully) the vast majority of cases. */
|
||
if (! (name->size >= 4 && name->data[1] == '-' && name->data[3] == '-'))
|
||
return symbol;
|
||
|
||
for (i = 0; i+1 < name->data[i]; )
|
||
switch (name->data[i])
|
||
{
|
||
case 'A':
|
||
if (name->data[i] != '-') goto no_more_modifiers;
|
||
not_canonical |= (modifiers & ~(alt_modifier - 1));
|
||
modifiers |= alt_modifier;
|
||
i += 2;
|
||
break;
|
||
|
||
case 'C':
|
||
if (name->data[i] != '-') goto no_more_modifiers;
|
||
not_canonical |= (modifiers & ~(ctrl_modifier - 1));
|
||
modifiers |= ctrl_modifier;
|
||
i += 2;
|
||
break;
|
||
|
||
case 'H':
|
||
if (name->data[i] != '-') goto no_more_modifiers;
|
||
not_canonical |= (modifiers & ~(hyper_modifier - 1));
|
||
modifiers |= hyper_modifier;
|
||
i += 2;
|
||
break;
|
||
|
||
case 'M':
|
||
if (name->data[i] != '-') goto no_more_modifiers;
|
||
not_canonical |= (modifiers & ~(meta_modifier - 1));
|
||
modifiers |= meta_modifier;
|
||
i += 2;
|
||
break;
|
||
|
||
case 'S':
|
||
if (name->data[i] != '-') goto no_more_modifiers;
|
||
not_canonical |= (modifiers & ~(shift_modifier - 1));
|
||
modifiers |= shift_modifier;
|
||
i += 2;
|
||
break;
|
||
|
||
case 's':
|
||
if (i + 6 > name->size
|
||
|| strncmp (name->data + i, "super-", 6))
|
||
goto no_more_modifiers;
|
||
not_canonical |= (modifiers & ~(super_modifier - 1));
|
||
modifiers |= super_modifier;
|
||
i += 6;
|
||
break;
|
||
|
||
case 'd':
|
||
if (i + 5 > name->size)
|
||
goto no_more_modifiers;
|
||
if (! strncmp (name->data + i, "drag-", 5))
|
||
{
|
||
not_canonical |= (modifiers & ~(drag_modifier - 1));
|
||
modifiers |= drag_modifier;
|
||
i += 5;
|
||
}
|
||
else if (! strncmp (name->data + i, "down-", 5))
|
||
{
|
||
not_canonical |= (modifiers & ~(down_modifier - 1));
|
||
modifiers |= down_modifier;
|
||
i += 5;
|
||
}
|
||
else
|
||
goto no_more_modifiers;
|
||
break;
|
||
|
||
default:
|
||
goto no_more_modifiers;
|
||
}
|
||
no_more_modifiers:
|
||
|
||
if (!not_canonical)
|
||
return symbol;
|
||
|
||
/* The modifiers were out of order, so find a new symbol with the
|
||
mods in order. Since the symbol name could contain nulls, we can't
|
||
use intern here; we have to use Fintern, which expects a genuine
|
||
Lisp_String, and keeps a reference to it. */
|
||
{
|
||
char *new_mods = (char *) alloca (sizeof ("A-C-H-M-S-super-U-down-drag-"));
|
||
int len = format_modifiers (modifiers, new_mods);
|
||
Lisp_Object new_name = make_uninit_string (len + name->size - i);
|
||
|
||
bcopy (new_mods, XSTRING (new_name)->data, len);
|
||
bcopy (name->data + i, XSTRING (new_name)->data + len, name->size - i);
|
||
|
||
return Fintern (new_name, Qnil);
|
||
}
|
||
}
|
||
|
||
|
||
/* For handling events, we often want to produce a symbol whose name
|
||
is a series of modifier key prefixes ("M-", "C-", etcetera) attached
|
||
to some base, like the name of a function key or mouse button.
|
||
modify_event_symbol produces symbols of this sort.
|
||
|
||
NAME_TABLE should point to an array of strings, such that NAME_TABLE[i]
|
||
is the name of the i'th symbol. TABLE_SIZE is the number of elements
|
||
in the table.
|
||
|
||
SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will
|
||
persist between calls to modify_event_symbol that it can use to
|
||
store a cache of the symbols it's generated for this NAME_TABLE
|
||
before.
|
||
|
||
SYMBOL_NUM is the number of the base name we want from NAME_TABLE.
|
||
|
||
MODIFIERS is a set of modifier bits (as given in struct input_events)
|
||
whose prefixes should be applied to the symbol name.
|
||
|
||
SYMBOL_KIND is the value to be placed in the event_kind property of
|
||
the returned symbol. */
|
||
|
||
static Lisp_Object
|
||
modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table,
|
||
symbol_table, table_size)
|
||
int symbol_num;
|
||
unsigned modifiers;
|
||
Lisp_Object symbol_kind;
|
||
char **name_table;
|
||
Lisp_Object *symbol_table;
|
||
int table_size;
|
||
{
|
||
Lisp_Object *slot, *unmodified_slot;
|
||
|
||
/* Is this a request for a valid symbol? */
|
||
if (symbol_num < 0 || symbol_num >= table_size
|
||
|| modifiers >= NUM_MODIFIER_COMBOS)
|
||
abort ();
|
||
|
||
/* If *symbol_table is not a vector of the appropriate size,
|
||
set it to one. */
|
||
if (XTYPE (*symbol_table) != Lisp_Vector
|
||
|| XVECTOR (*symbol_table)->size != table_size)
|
||
*symbol_table = Fmake_vector (make_number (table_size), Qnil);
|
||
|
||
unmodified_slot = slot = & XVECTOR (*symbol_table)->contents[symbol_num];
|
||
|
||
/* If there are modifier keys, there had better be a vector in
|
||
this symbol's position of the symbol_table. */
|
||
if (modifiers != 0)
|
||
{
|
||
Lisp_Object slot_contents = *slot;
|
||
|
||
/* If there isn't the right sort of vector there, put one in. */
|
||
if (XTYPE (slot_contents) != Lisp_Vector
|
||
|| XVECTOR (slot_contents)->size != NUM_MODIFIER_COMBOS)
|
||
{
|
||
*slot = Fmake_vector (make_number (NUM_MODIFIER_COMBOS), Qnil);
|
||
|
||
/* Make sure that the vector has an entry for the unmodified
|
||
symbol, so we can put it on the event_unmodified property. */
|
||
if (! NILP (slot_contents))
|
||
XVECTOR (*slot)->contents[0] = slot_contents;
|
||
else
|
||
XVECTOR (*slot)->contents[0] = intern (name_table [symbol_num]);
|
||
}
|
||
}
|
||
|
||
/* If this entry has been filled in with a modified symbol vector,
|
||
point to the appropriate slot within that. */
|
||
if (XTYPE (*slot) == Lisp_Vector)
|
||
{
|
||
unmodified_slot = & XVECTOR (*slot)->contents[0];
|
||
slot = & XVECTOR (*slot)->contents[modifiers];
|
||
}
|
||
|
||
/* Make sure we have an unmodified version of the symbol in its
|
||
proper place? */
|
||
if (NILP (*unmodified_slot))
|
||
{
|
||
*unmodified_slot = intern (name_table [symbol_num]);
|
||
Fput (*unmodified_slot, Qevent_kind, symbol_kind);
|
||
Fput (*unmodified_slot, Qevent_unmodified, *unmodified_slot);
|
||
}
|
||
|
||
/* Have we already created a symbol for this combination of modifiers? */
|
||
if (NILP (*slot))
|
||
{
|
||
/* No, let's create one. */
|
||
char *modified_name
|
||
= (char *) alloca (sizeof ("C-M-S-U-")
|
||
+ strlen (name_table [symbol_num]));
|
||
|
||
strcpy (modified_name + format_modifiers (modifiers, modified_name),
|
||
name_table [symbol_num]);
|
||
|
||
*slot = intern (modified_name);
|
||
Fput (*slot, Qevent_kind, symbol_kind);
|
||
Fput (*slot, Qevent_unmodified, *unmodified_slot);
|
||
}
|
||
|
||
return *slot;
|
||
}
|
||
|
||
DEFUN ("mouse-click-p", Fmouse_click_p, Smouse_click_p, 1, 1, 0,
|
||
"Return non-nil iff OBJECT is a representation of a mouse event.\n\
|
||
A mouse event is a list of five elements whose car is a symbol of the\n\
|
||
form <MODIFIERS>mouse-<DIGIT>. I hope this is a temporary hack.")
|
||
(object)
|
||
Lisp_Object object;
|
||
{
|
||
if (EVENT_HAS_PARAMETERS (object)
|
||
&& EQ (EVENT_HEAD_KIND (EVENT_HEAD (object)),
|
||
Qmouse_click))
|
||
return Qt;
|
||
else
|
||
return Qnil;
|
||
}
|
||
|
||
/* Store into *addr a value nonzero if terminal input chars are available.
|
||
Serves the purpose of ioctl (0, FIONREAD, addr)
|
||
but works even if FIONREAD does not exist.
|
||
(In fact, this may actually read some input.) */
|
||
|
||
static void
|
||
get_input_pending (addr)
|
||
int *addr;
|
||
{
|
||
/* First of all, have we already counted some input? */
|
||
*addr = !NILP (Vquit_flag) || readable_events ();
|
||
|
||
/* If input is being read as it arrives, and we have none, there is none. */
|
||
if (*addr > 0 || (interrupt_input && ! interrupts_deferred))
|
||
return;
|
||
|
||
/* Try to read some input and see how much we get. */
|
||
gobble_input (0);
|
||
*addr = !NILP (Vquit_flag) || readable_events ();
|
||
}
|
||
|
||
/* Interface to read_avail_input, blocking SIGIO if necessary. */
|
||
|
||
int
|
||
gobble_input (expected)
|
||
int expected;
|
||
{
|
||
#ifndef VMS
|
||
#ifdef SIGIO
|
||
if (interrupt_input)
|
||
{
|
||
SIGMASKTYPE mask;
|
||
mask = sigblockx (SIGIO);
|
||
read_avail_input (expected);
|
||
sigsetmask (mask);
|
||
}
|
||
else
|
||
#endif
|
||
read_avail_input (expected);
|
||
#endif
|
||
}
|
||
|
||
#ifndef VMS
|
||
|
||
/* Read any terminal input already buffered up by the system
|
||
into the kbd_buffer, but do not wait.
|
||
|
||
EXPECTED should be nonzero if the caller knows there is some input.
|
||
|
||
Except on VMS, all input is read by this function.
|
||
If interrupt_input is nonzero, this function MUST be called
|
||
only when SIGIO is blocked.
|
||
|
||
Returns the number of keyboard chars read, or -1 meaning
|
||
this is a bad time to try to read input. */
|
||
|
||
static int
|
||
read_avail_input (expected)
|
||
int expected;
|
||
{
|
||
struct input_event buf[KBD_BUFFER_SIZE];
|
||
register int i;
|
||
int nread;
|
||
|
||
if (read_socket_hook)
|
||
/* No need for FIONREAD or fcntl; just say don't wait. */
|
||
nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected);
|
||
else
|
||
{
|
||
unsigned char cbuf[KBD_BUFFER_SIZE];
|
||
|
||
#ifdef FIONREAD
|
||
/* Find out how much input is available. */
|
||
if (ioctl (0, FIONREAD, &nread) < 0)
|
||
/* Formerly simply reported no input, but that sometimes led to
|
||
a failure of Emacs to terminate.
|
||
SIGHUP seems appropriate if we can't reach the terminal. */
|
||
kill (getpid (), SIGHUP);
|
||
if (nread == 0)
|
||
return 0;
|
||
if (nread > sizeof cbuf)
|
||
nread = sizeof cbuf;
|
||
#else /* no FIONREAD */
|
||
#ifdef USG
|
||
/* Read some input if available, but don't wait. */
|
||
nread = sizeof cbuf;
|
||
fcntl (fileno (stdin), F_SETFL, O_NDELAY);
|
||
#else
|
||
you lose;
|
||
#endif
|
||
#endif
|
||
|
||
/* Now read; for one reason or another, this will not block. */
|
||
while (1)
|
||
{
|
||
nread = read (fileno (stdin), cbuf, nread);
|
||
#ifdef AIX
|
||
/* The kernel sometimes fails to deliver SIGHUP for ptys.
|
||
This looks incorrect, but it isn't, because _BSD causes
|
||
O_NDELAY to be defined in fcntl.h as O_NONBLOCK,
|
||
and that causes a value other than 0 when there is no input. */
|
||
if (nread == 0)
|
||
kill (SIGHUP, 0);
|
||
#endif
|
||
/* Retry the read if it is interrupted. */
|
||
if (nread >= 0
|
||
|| ! (errno == EAGAIN || errno == EFAULT
|
||
#ifdef EBADSLT
|
||
|| errno == EBADSLT
|
||
#endif
|
||
))
|
||
break;
|
||
}
|
||
|
||
#ifndef FIONREAD
|
||
#ifdef USG
|
||
fcntl (fileno (stdin), F_SETFL, 0);
|
||
#endif /* USG */
|
||
#endif /* no FIONREAD */
|
||
for (i = 0; i < nread; i++)
|
||
{
|
||
buf[i].kind = ascii_keystroke;
|
||
XSET (buf[i].code, Lisp_Int, cbuf[i]);
|
||
buf[i].frame = selected_frame;
|
||
}
|
||
}
|
||
|
||
/* Scan the chars for C-g and store them in kbd_buffer. */
|
||
for (i = 0; i < nread; i++)
|
||
{
|
||
kbd_buffer_store_event (&buf[i]);
|
||
/* Don't look at input that follows a C-g too closely.
|
||
This reduces lossage due to autorepeat on C-g. */
|
||
if (buf[i].kind == ascii_keystroke
|
||
&& XINT(buf[i].code) == quit_char)
|
||
break;
|
||
}
|
||
|
||
return nread;
|
||
}
|
||
#endif /* not VMS */
|
||
|
||
#ifdef SIGIO /* for entire page */
|
||
/* Note SIGIO has been undef'd if FIONREAD is missing. */
|
||
|
||
SIGTYPE
|
||
input_available_signal (signo)
|
||
int signo;
|
||
{
|
||
/* Must preserve main program's value of errno. */
|
||
int old_errno = errno;
|
||
#ifdef BSD4_1
|
||
extern int select_alarmed;
|
||
#endif
|
||
|
||
#ifdef USG
|
||
/* USG systems forget handlers when they are used;
|
||
must reestablish each time */
|
||
signal (signo, input_available_signal);
|
||
#endif /* USG */
|
||
|
||
#ifdef BSD4_1
|
||
sigisheld (SIGIO);
|
||
#endif
|
||
|
||
if (input_available_clear_time)
|
||
EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
|
||
|
||
while (1)
|
||
{
|
||
int nread;
|
||
nread = read_avail_input (1);
|
||
/* -1 means it's not ok to read the input now.
|
||
UNBLOCK_INPUT will read it later; now, avoid infinite loop.
|
||
0 means there was no keyboard input available. */
|
||
if (nread <= 0)
|
||
break;
|
||
|
||
#ifdef BSD4_1
|
||
select_alarmed = 1; /* Force the select emulator back to life */
|
||
#endif
|
||
}
|
||
|
||
#ifdef BSD4_1
|
||
sigfree ();
|
||
#endif
|
||
errno = old_errno;
|
||
}
|
||
#endif /* SIGIO */
|
||
|
||
/* Return the prompt-string of a sparse keymap.
|
||
This is the first element which is a string.
|
||
Return nil if there is none. */
|
||
|
||
Lisp_Object
|
||
map_prompt (map)
|
||
Lisp_Object map;
|
||
{
|
||
while (CONSP (map))
|
||
{
|
||
register Lisp_Object tem;
|
||
tem = Fcar (map);
|
||
if (XTYPE (tem) == Lisp_String)
|
||
return tem;
|
||
map = Fcdr (map);
|
||
}
|
||
return Qnil;
|
||
}
|
||
|
||
static int echo_flag;
|
||
static int echo_now;
|
||
|
||
/* Read a character like read_char but optionally prompt based on maps
|
||
in the array MAPS. 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.
|
||
|
||
If we use a mouse menu to read the input, we store 1 into *USED_MOUSE_MENU.
|
||
Otherwise we store 0 there.
|
||
|
||
The prompting is done based on the prompt-string of the map
|
||
and the strings associated with various map elements. */
|
||
|
||
Lisp_Object
|
||
read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu)
|
||
int nmaps;
|
||
Lisp_Object *maps;
|
||
Lisp_Object prev_event;
|
||
int *used_mouse_menu;
|
||
{
|
||
int mapno;
|
||
register Lisp_Object name;
|
||
int nlength;
|
||
int width = FRAME_WIDTH (selected_frame) - 4;
|
||
char *menu = (char *) alloca (width + 4);
|
||
int idx = -1;
|
||
Lisp_Object rest, vector;
|
||
|
||
*used_mouse_menu = 0;
|
||
|
||
/* Use local over global Menu maps */
|
||
|
||
if (! menu_prompting)
|
||
return Qnil;
|
||
|
||
/* Get the menu name from the first map that has one (a prompt string). */
|
||
for (mapno = 0; mapno < nmaps; mapno++)
|
||
{
|
||
name = map_prompt (maps[mapno]);
|
||
if (!NILP (name))
|
||
break;
|
||
}
|
||
|
||
/* If we don't have any menus, just read a character normally. */
|
||
if (NILP (name))
|
||
return Qnil;
|
||
|
||
#ifdef HAVE_X_WINDOW
|
||
#ifndef NO_X_MENU
|
||
/* If we got to this point via a mouse click,
|
||
use a real menu for mouse selection. */
|
||
if (XTYPE (prev_event) == Lisp_Cons)
|
||
{
|
||
/* Display the menu and get the selection. */
|
||
Lisp_Object *realmaps
|
||
= (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object));
|
||
Lisp_Object value;
|
||
int nmaps1 = 0;
|
||
|
||
/* Use the maps that are not nil. */
|
||
for (mapno = 0; mapno < nmaps; mapno++)
|
||
if (!NILP (maps[mapno]))
|
||
realmaps[nmaps1++] = maps[mapno];
|
||
|
||
value = Fx_popup_menu (prev_event, Flist (nmaps1, realmaps));
|
||
if (NILP (value))
|
||
XSET (value, Lisp_Int, quit_char);
|
||
*used_mouse_menu = 1;
|
||
return value;
|
||
}
|
||
#endif /* not NO_X_MENU */
|
||
#endif /* HAVE_X_WINDOW */
|
||
|
||
/* Prompt string always starts with map's prompt, and a space. */
|
||
strcpy (menu, XSTRING (name)->data);
|
||
nlength = XSTRING (name)->size;
|
||
menu[nlength++] = ':';
|
||
menu[nlength++] = ' ';
|
||
menu[nlength] = 0;
|
||
|
||
/* Start prompting at start of first map. */
|
||
mapno = 0;
|
||
rest = maps[mapno];
|
||
|
||
/* Present the documented bindings, a line at a time. */
|
||
while (1)
|
||
{
|
||
int notfirst = 0;
|
||
int i = nlength;
|
||
Lisp_Object obj;
|
||
int ch;
|
||
|
||
/* Loop over elements of map. */
|
||
while (i < width)
|
||
{
|
||
Lisp_Object s, elt;
|
||
|
||
/* If reached end of map, start at beginning of next map. */
|
||
if (NILP (rest))
|
||
{
|
||
mapno++;
|
||
/* At end of last map, wrap around to first map if just starting,
|
||
or end this line if already have something on it. */
|
||
if (mapno == nmaps)
|
||
{
|
||
if (notfirst)
|
||
break;
|
||
else
|
||
mapno = 0;
|
||
}
|
||
rest = maps[mapno];
|
||
}
|
||
|
||
/* Look at the next element of the map. */
|
||
if (idx >= 0)
|
||
elt = XVECTOR (vector)->contents[idx];
|
||
else
|
||
elt = Fcar_safe (rest);
|
||
|
||
if (idx < 0 && XTYPE (elt) == Lisp_Vector)
|
||
{
|
||
/* If we found a dense table in the keymap,
|
||
advanced past it, but start scanning its contents. */
|
||
rest = Fcdr_safe (rest);
|
||
vector = elt;
|
||
idx = 0;
|
||
}
|
||
else
|
||
{
|
||
/* An ordinary element. */
|
||
s = Fcar_safe (Fcdr_safe (elt));
|
||
if (XTYPE (s) != Lisp_String)
|
||
/* Ignore the element if it has no prompt string. */
|
||
;
|
||
/* If we have room for the prompt string, add it to this line.
|
||
If this is the first on the line, always add it. */
|
||
else if (XSTRING (s)->size + i < width
|
||
|| !notfirst)
|
||
{
|
||
int thiswidth;
|
||
|
||
/* Punctuate between strings. */
|
||
if (notfirst)
|
||
{
|
||
strcpy (menu + i, ", ");
|
||
i += 2;
|
||
}
|
||
notfirst = 1;
|
||
|
||
/* Add as much of string as fits. */
|
||
thiswidth = XSTRING (s)->size;
|
||
if (thiswidth + i > width)
|
||
thiswidth = width - i;
|
||
bcopy (XSTRING (s)->data, menu + i, thiswidth);
|
||
i += thiswidth;
|
||
}
|
||
else
|
||
{
|
||
/* If this element does not fit, end the line now,
|
||
and save the element for the next line. */
|
||
strcpy (menu + i, "...");
|
||
break;
|
||
}
|
||
|
||
/* Move past this element. */
|
||
if (idx >= 0 && idx + 1 >= XVECTOR (rest)->size)
|
||
/* Handle reaching end of dense table. */
|
||
idx = -1;
|
||
if (idx >= 0)
|
||
idx++;
|
||
else
|
||
rest = Fcdr_safe (rest);
|
||
}
|
||
}
|
||
|
||
/* Prompt with that and read response. */
|
||
message1 (menu);
|
||
obj = read_char (1, 0, 0, Qnil, 0);
|
||
|
||
if (XTYPE (obj) != Lisp_Int)
|
||
return obj;
|
||
else
|
||
ch = XINT (obj);
|
||
|
||
if (obj != menu_prompt_more_char
|
||
&& (XTYPE (menu_prompt_more_char) != Lisp_Int
|
||
|| obj != make_number (Ctl (XINT (menu_prompt_more_char)))))
|
||
return obj;
|
||
}
|
||
}
|
||
|
||
/* Reading key sequences. */
|
||
|
||
/* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings
|
||
in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a
|
||
keymap, or nil otherwise. Return the index of the first keymap in
|
||
which KEY has any binding, or NMAPS if no map has a binding.
|
||
|
||
If KEY is a meta ASCII character, treat it like meta-prefix-char
|
||
followed by the corresponding non-meta character. Keymaps in
|
||
CURRENT with non-prefix bindings for meta-prefix-char become nil in
|
||
NEXT.
|
||
|
||
When KEY is not defined in any of the keymaps, if it is an upper
|
||
case letter and there are bindings for the corresponding lower-case
|
||
letter, return the bindings for the lower-case letter.
|
||
|
||
NEXT may == CURRENT. */
|
||
|
||
static int
|
||
follow_key (key, nmaps, current, defs, next)
|
||
Lisp_Object key;
|
||
Lisp_Object *current, *defs, *next;
|
||
int nmaps;
|
||
{
|
||
int i, first_binding;
|
||
|
||
/* If KEY is a meta ASCII character, treat it like meta-prefix-char
|
||
followed by the corresponding non-meta character. */
|
||
if (XTYPE (key) == Lisp_Int
|
||
&& XINT (key) >= 0200)
|
||
{
|
||
for (i = 0; i < nmaps; i++)
|
||
if (! NILP (current[i]))
|
||
{
|
||
next[i] = get_keyelt (access_keymap (current[i],
|
||
meta_prefix_char));
|
||
|
||
/* Note that since we pass the resulting bindings through
|
||
get_keymap_1, non-prefix bindings for meta-prefix-char
|
||
disappear. */
|
||
next[i] = get_keymap_1 (next[i], 0);
|
||
}
|
||
else
|
||
next[i] = Qnil;
|
||
|
||
current = next;
|
||
XSET (key, Lisp_Int, XFASTINT (key) & 0177);
|
||
}
|
||
|
||
first_binding = nmaps;
|
||
for (i = nmaps - 1; i >= 0; i--)
|
||
{
|
||
if (! NILP (current[i]))
|
||
{
|
||
defs[i] = get_keyelt (access_keymap (current[i], key));
|
||
if (! NILP (defs[i]))
|
||
first_binding = i;
|
||
}
|
||
else
|
||
defs[i] = Qnil;
|
||
}
|
||
|
||
/* When KEY is not defined in any of the keymaps, if it is an upper
|
||
case letter and there are bindings for the corresponding
|
||
lower-case letter, return the bindings for the lower-case letter. */
|
||
if (first_binding == nmaps
|
||
&& XTYPE (key) == Lisp_Int
|
||
&& UPPERCASEP (XINT (key)))
|
||
{
|
||
XSETINT (key, DOWNCASE (XINT (key)));
|
||
|
||
first_binding = nmaps;
|
||
for (i = nmaps - 1; i >= 0; i--)
|
||
{
|
||
if (! NILP (current[i]))
|
||
{
|
||
defs[i] = get_keyelt (access_keymap (current[i], key));
|
||
if (! NILP (defs[i]))
|
||
first_binding = i;
|
||
}
|
||
else
|
||
defs[i] = Qnil;
|
||
}
|
||
}
|
||
|
||
/* Given the set of bindings we've found, produce the next set of maps. */
|
||
for (i = 0; i < nmaps; i++)
|
||
next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0);
|
||
|
||
return first_binding;
|
||
}
|
||
|
||
/* Read a sequence of keys that ends with a non prefix character
|
||
according to the keymaps in KEYMAPS[0..nmaps-1]. Keymaps appearing
|
||
earlier in KEYMAPS take precidence over those appearing later.
|
||
|
||
Store the sequence in KEYBUF, a buffer of size BUFSIZE. Prompt
|
||
with PROMPT. Echo starting immediately unless `prompt' is 0.
|
||
Return the length of the key sequence stored.
|
||
|
||
If the user switches frames in the midst of a key sequence, we
|
||
throw away any prefix we have read so far, and start afresh. For
|
||
mouse clicks, we look up the click in the keymap of the buffer
|
||
clicked on, throwing away any prefix if it is not the same buffer
|
||
we used to be reading from. */
|
||
|
||
static int
|
||
read_key_sequence (keybuf, bufsize, prompt)
|
||
Lisp_Object *keybuf;
|
||
int bufsize;
|
||
Lisp_Object prompt;
|
||
{
|
||
/* How many keys there are in the current key sequence. */
|
||
int t;
|
||
|
||
/* The buffer that the most recently read event was typed at. This
|
||
helps us read mouse clicks according to the buffer clicked in,
|
||
and notice when the mouse has moved from one frame to another. */
|
||
struct buffer *last_event_buffer = current_buffer;
|
||
|
||
/* The length of the echo buffer when we started reading, and
|
||
the length of this_command_keys when we started reading. */
|
||
int echo_start;
|
||
int keys_start = this_command_key_count;
|
||
|
||
/* The number of keymaps we're scanning right now, and the number of
|
||
keymaps we have allocated space for. */
|
||
int nmaps;
|
||
int nmaps_allocated = 0;
|
||
|
||
/* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
|
||
in the current keymaps, or nil where it is not a prefix. */
|
||
Lisp_Object *submaps;
|
||
|
||
/* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in
|
||
the current keymaps. */
|
||
Lisp_Object *defs;
|
||
|
||
/* The index of the first keymap that has a binding for this key
|
||
sequence. In other words, the lowest i such that defs[i] is
|
||
non-nil.*/
|
||
int first_binding;
|
||
|
||
/* If mock_input > t, then KEYBUF[t] should be read as the next
|
||
input key.
|
||
|
||
We use this to recover after recognizing a function key. Once we
|
||
realize that a suffix of the current key sequence is actually a
|
||
function key's escape sequence, we replace the suffix with the
|
||
function key's binding from Vfunction_key_map. Now keybuf
|
||
contains a new and different key sequence, so the echo area and
|
||
the submaps and defs arrays are wrong. In this situation, we set
|
||
mock_input to t, set t to 0, and jump to restart; the loop will
|
||
read keys from keybuf up until mock_input, which rebuilds the
|
||
state, and then it will resume reading characters from the keyboard. */
|
||
int mock_input = 0;
|
||
|
||
/* If the sequence is unbound in submaps[], then
|
||
keymap[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map,
|
||
and fkey_map is its binding. If mock_input is in use, these
|
||
might be > t, indicating that all function key scanning should
|
||
hold off until t reaches them. */
|
||
|
||
int fkey_start = 0, fkey_end = 0;
|
||
Lisp_Object fkey_map = Vfunction_key_map;
|
||
|
||
last_nonmenu_event = Qnil;
|
||
|
||
if (INTERACTIVE)
|
||
{
|
||
if (prompt)
|
||
echo_prompt (prompt);
|
||
else if (cursor_in_echo_area)
|
||
/* This doesn't put in a dash if the echo buffer is empty, so
|
||
you don't always see a dash hanging out in the minibuffer. */
|
||
echo_dash ();
|
||
echo_start = echo_length ();
|
||
}
|
||
|
||
/* If there is no function key map, turn off function key scanning. */
|
||
if (NILP (Fkeymapp (Vfunction_key_map)))
|
||
fkey_start = fkey_end = bufsize + 1;
|
||
|
||
restart:
|
||
t = 0;
|
||
this_command_key_count = keys_start;
|
||
|
||
{
|
||
Lisp_Object *maps;
|
||
|
||
nmaps = current_minor_maps (0, &maps) + 2;
|
||
if (nmaps > nmaps_allocated)
|
||
{
|
||
submaps = (Lisp_Object *) alloca (nmaps * sizeof (submaps[0]));
|
||
defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0]));
|
||
nmaps_allocated = nmaps;
|
||
}
|
||
bcopy (maps, submaps, (nmaps - 2) * sizeof (submaps[0]));
|
||
submaps[nmaps-2] = last_event_buffer->keymap;
|
||
submaps[nmaps-1] = global_map;
|
||
}
|
||
|
||
/* Find an accurate initial value for first_binding. */
|
||
for (first_binding = 0; first_binding < nmaps; first_binding++)
|
||
if (! NILP (submaps[first_binding]))
|
||
break;
|
||
|
||
while ((first_binding < nmaps && ! NILP (submaps[first_binding]))
|
||
|| (first_binding >= nmaps && fkey_start < t))
|
||
{
|
||
Lisp_Object key;
|
||
int used_mouse_menu = 0;
|
||
|
||
if (t >= bufsize)
|
||
error ("key sequence too long");
|
||
|
||
/* Are we re-reading a key sequence, as indicated by mock_input? */
|
||
if (t < mock_input)
|
||
{
|
||
key = keybuf[t];
|
||
add_command_key (key);
|
||
echo_char (key);
|
||
}
|
||
|
||
/* If not, we should actually read a character. */
|
||
else
|
||
{
|
||
struct buffer *buf;
|
||
|
||
key = read_char (!prompt, nmaps, submaps, last_nonmenu_event,
|
||
&used_mouse_menu);
|
||
|
||
/* The above routines return -1 at the end of a macro.
|
||
Emacs 18 handles this by returning immediately with a
|
||
zero, so that's what we'll do. */
|
||
if (XTYPE (key) == Lisp_Int && XINT (key) < 0)
|
||
return 0;
|
||
|
||
Vquit_flag = Qnil;
|
||
|
||
#ifdef MULTI_FRAME
|
||
/* What buffer was this event typed/moused at? */
|
||
if (used_mouse_menu)
|
||
/* Never change last_event_buffer for using a menu. */
|
||
buf = last_event_buffer;
|
||
else if (XTYPE (key) == Lisp_Int || XTYPE (key) == Lisp_Symbol)
|
||
{
|
||
buf = ((XTYPE (Vlast_event_frame) == Lisp_Frame)
|
||
? (XBUFFER
|
||
(XWINDOW
|
||
(FRAME_SELECTED_WINDOW
|
||
(XFRAME (Vlast_event_frame)))->buffer))
|
||
: last_event_buffer);
|
||
}
|
||
else if (EVENT_HAS_PARAMETERS (key))
|
||
{
|
||
Lisp_Object window = EVENT_WINDOW (key);
|
||
|
||
if (NILP (window))
|
||
abort ();
|
||
|
||
buf = XBUFFER (XWINDOW (window)->buffer);
|
||
}
|
||
else
|
||
abort ();
|
||
|
||
/* If this event came to a different buffer than the one
|
||
we're currently in, switch buffers and start a new key
|
||
sequence, starting with key. */
|
||
if (buf != last_event_buffer)
|
||
{
|
||
last_event_buffer = buf;
|
||
Fselect_frame (Vlast_event_frame, Qnil);
|
||
|
||
/* Arrange to read key as the next event. */
|
||
keybuf[0] = key;
|
||
mock_input = 1;
|
||
|
||
/* Truncate the key sequence in the echo area. */
|
||
if (INTERACTIVE)
|
||
echo_truncate (echo_start);
|
||
|
||
goto restart;
|
||
}
|
||
#endif
|
||
}
|
||
|
||
first_binding = (follow_key (key,
|
||
nmaps - first_binding,
|
||
submaps + first_binding,
|
||
defs + first_binding,
|
||
submaps + first_binding)
|
||
+ first_binding);
|
||
keybuf[t++] = key;
|
||
/* Normally, last_nonmenu_event gets the previous key we read.
|
||
But when a mouse popup menu is being used,
|
||
we don't update last_nonmenu_event; it continues to hold the mouse
|
||
event that preceded the first level of menu. */
|
||
if (!used_mouse_menu)
|
||
last_nonmenu_event = key;
|
||
|
||
/* If the sequence is unbound, see if we can hang a function key
|
||
off the end of it. We only want to scan real keyboard input
|
||
for function key sequences, so if mock_input says that we're
|
||
re-scanning after expanding a function key, don't examine it. */
|
||
if (first_binding >= nmaps
|
||
&& t >= mock_input)
|
||
{
|
||
Lisp_Object fkey_next;
|
||
|
||
/* Scan from fkey_end until we find a bound suffix. */
|
||
while (fkey_end < t)
|
||
{
|
||
/* Look up meta-characters by prefixing them
|
||
with meta_prefix_char. I hate this. */
|
||
if (keybuf[fkey_end] & 0x80)
|
||
fkey_next =
|
||
get_keymap_1 (get_keyelt
|
||
(access_keymap (fkey_map, meta_prefix_char)),
|
||
0);
|
||
else
|
||
fkey_next = fkey_map;
|
||
|
||
fkey_next =
|
||
get_keyelt (access_keymap
|
||
(fkey_next, keybuf[fkey_end++] & 0x7f));
|
||
|
||
/* If keybuf[fkey_start..fkey_end] is bound in the
|
||
function key map and it's a suffix of the current
|
||
sequence (i.e. fkey_end == t), replace it with
|
||
the binding and restart with fkey_start at the end. */
|
||
if (XTYPE (fkey_next) == Lisp_Vector
|
||
&& fkey_end == t)
|
||
{
|
||
t = fkey_start + XVECTOR (fkey_next)->size;
|
||
if (t >= bufsize)
|
||
error ("key sequence too long");
|
||
|
||
bcopy (XVECTOR (fkey_next)->contents,
|
||
keybuf + fkey_start,
|
||
(t - fkey_start) * sizeof (keybuf[0]));
|
||
|
||
mock_input = t;
|
||
fkey_start = fkey_end = t;
|
||
|
||
/* Truncate the key sequence in the echo area. */
|
||
if (INTERACTIVE)
|
||
echo_truncate (echo_start);
|
||
|
||
goto restart;
|
||
}
|
||
|
||
fkey_map = get_keymap_1 (fkey_next, 0);
|
||
|
||
/* If we no longer have a bound suffix, try a new positions for
|
||
fkey_start. */
|
||
if (NILP (fkey_map))
|
||
{
|
||
fkey_end = ++fkey_start;
|
||
fkey_map = Vfunction_key_map;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
read_key_sequence_cmd = (first_binding < nmaps
|
||
? defs[first_binding]
|
||
: Qnil);
|
||
|
||
return t;
|
||
}
|
||
|
||
DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0,
|
||
"Read a sequence of keystrokes and return as a string or vector.\n\
|
||
The sequence is sufficient to specify a non-prefix command in the\n\
|
||
current local and global maps.\n\
|
||
\n\
|
||
First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\
|
||
Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\
|
||
as a continuation of the previous key.\n\
|
||
\n\
|
||
If Emacs is running on multiple frames, switching between frames in\n\
|
||
the midst of a keystroke will toss any prefix typed so far. A C-g\n\
|
||
typed while in this function is treated like any other character, and\n\
|
||
`quit-flag' is not set.")
|
||
(prompt, continue_echo)
|
||
Lisp_Object prompt, continue_echo;
|
||
{
|
||
Lisp_Object keybuf[30];
|
||
register int i;
|
||
struct gcpro gcpro1, gcpro2;
|
||
|
||
if (!NILP (prompt))
|
||
CHECK_STRING (prompt, 0);
|
||
QUIT;
|
||
|
||
bzero (keybuf, sizeof keybuf);
|
||
GCPRO1 (keybuf[0]);
|
||
gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0]));
|
||
|
||
if (NILP (continue_echo))
|
||
this_command_key_count = 0;
|
||
|
||
i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])),
|
||
NILP (prompt) ? 0 : XSTRING (prompt)->data);
|
||
|
||
UNGCPRO;
|
||
return make_array (i, keybuf);
|
||
}
|
||
|
||
DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0,
|
||
"Execute CMD as an editor command.\n\
|
||
CMD must be a symbol that satisfies the `commandp' predicate.\n\
|
||
Optional second arg RECORD-FLAG non-nil\n\
|
||
means unconditionally put this command in `command-history'.\n\
|
||
Otherwise, that is done only if an arg is read using the minibuffer.")
|
||
(cmd, record)
|
||
Lisp_Object cmd, record;
|
||
{
|
||
register Lisp_Object final;
|
||
register Lisp_Object tem;
|
||
Lisp_Object prefixarg;
|
||
struct backtrace backtrace;
|
||
extern int debug_on_next_call;
|
||
|
||
prefixarg = Vprefix_arg, Vprefix_arg = Qnil;
|
||
Vcurrent_prefix_arg = prefixarg;
|
||
debug_on_next_call = 0;
|
||
|
||
if (XTYPE (cmd) == Lisp_Symbol)
|
||
{
|
||
tem = Fget (cmd, Qdisabled);
|
||
if (!NILP (tem))
|
||
return call1 (Vrun_hooks, Vdisabled_command_hook);
|
||
}
|
||
|
||
while (1)
|
||
{
|
||
final = Findirect_function (cmd);
|
||
|
||
if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload)))
|
||
do_autoload (final, cmd);
|
||
else
|
||
break;
|
||
}
|
||
|
||
if (XTYPE (final) == Lisp_String
|
||
|| XTYPE (final) == Lisp_Vector)
|
||
{
|
||
/* If requested, place the macro in the command history. For
|
||
other sorts of commands, call-interactively takes care of
|
||
this. */
|
||
if (!NILP (record))
|
||
Vcommand_history
|
||
= Fcons (Fcons (Qexecute_kbd_macro,
|
||
Fcons (final, Fcons (prefixarg, Qnil))),
|
||
Vcommand_history);
|
||
|
||
return Fexecute_kbd_macro (final, prefixarg);
|
||
}
|
||
if (CONSP (final) || XTYPE (final) == Lisp_Subr
|
||
|| XTYPE (final) == Lisp_Compiled)
|
||
{
|
||
backtrace.next = backtrace_list;
|
||
backtrace_list = &backtrace;
|
||
backtrace.function = &Qcall_interactively;
|
||
backtrace.args = &cmd;
|
||
backtrace.nargs = 1;
|
||
backtrace.evalargs = 0;
|
||
|
||
tem = Fcall_interactively (cmd, record);
|
||
|
||
backtrace_list = backtrace.next;
|
||
return tem;
|
||
}
|
||
return Qnil;
|
||
}
|
||
|
||
DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command,
|
||
1, 1, "P",
|
||
"Read function name, then read its arguments and call it.")
|
||
(prefixarg)
|
||
Lisp_Object prefixarg;
|
||
{
|
||
Lisp_Object function;
|
||
char buf[40];
|
||
Lisp_Object saved_keys;
|
||
struct gcpro gcpro1;
|
||
|
||
saved_keys = Fthis_command_keys ();
|
||
buf[0] = 0;
|
||
GCPRO1 (saved_keys);
|
||
|
||
if (EQ (prefixarg, Qminus))
|
||
strcpy (buf, "- ");
|
||
else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4)
|
||
strcpy (buf, "C-u ");
|
||
else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int)
|
||
sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car));
|
||
else if (XTYPE (prefixarg) == Lisp_Int)
|
||
sprintf (buf, "%d ", XINT (prefixarg));
|
||
|
||
/* This isn't strictly correct if execute-extended-command
|
||
is bound to anything else. Perhaps it should use
|
||
this_command_keys? */
|
||
strcat (buf, "M-x ");
|
||
|
||
/* Prompt with buf, and then read a string, completing from and
|
||
restricting to the set of all defined commands. Don't provide
|
||
any initial input. The last Qnil says not to perform a
|
||
peculiar hack on the initial input. */
|
||
function = Fcompleting_read (build_string (buf),
|
||
Vobarray, Qcommandp,
|
||
Qt, Qnil, Qnil);
|
||
|
||
/* Set this_command_keys to the concatenation of saved_keys and
|
||
function, followed by a RET. */
|
||
{
|
||
struct Lisp_String *str;
|
||
int i;
|
||
Lisp_Object tem;
|
||
|
||
this_command_key_count = 0;
|
||
|
||
str = XSTRING (saved_keys);
|
||
for (i = 0; i < str->size; i++)
|
||
{
|
||
XFASTINT (tem) = str->data[i];
|
||
add_command_key (tem);
|
||
}
|
||
|
||
str = XSTRING (function);
|
||
for (i = 0; i < str->size; i++)
|
||
{
|
||
XFASTINT (tem) = str->data[i];
|
||
add_command_key (tem);
|
||
}
|
||
|
||
XFASTINT (tem) = '\015';
|
||
add_command_key (tem);
|
||
}
|
||
|
||
UNGCPRO;
|
||
|
||
function = Fintern (function, Vobarray);
|
||
Vprefix_arg = prefixarg;
|
||
this_command = function;
|
||
|
||
return Fcommand_execute (function, Qt);
|
||
}
|
||
|
||
|
||
detect_input_pending ()
|
||
{
|
||
if (!input_pending)
|
||
get_input_pending (&input_pending);
|
||
|
||
return input_pending;
|
||
}
|
||
|
||
/* This is called in some cases before a possible quit.
|
||
It cases the next call to detect_input_pending to recompute input_pending.
|
||
So calling this function unnecessarily can't do any harm. */
|
||
clear_input_pending ()
|
||
{
|
||
input_pending = 0;
|
||
}
|
||
|
||
DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0,
|
||
"T if command input is currently available with no waiting.\n\
|
||
Actually, the value is nil only if we can be sure that no input is available.")
|
||
()
|
||
{
|
||
if (!NILP (unread_command_char))
|
||
return (Qt);
|
||
|
||
return detect_input_pending () ? Qt : Qnil;
|
||
}
|
||
|
||
DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0,
|
||
"Return vector of last 100 chars read from terminal.")
|
||
()
|
||
{
|
||
Lisp_Object *keys = XVECTOR (recent_keys)->contents;
|
||
Lisp_Object val;
|
||
|
||
if (total_keys < NUM_RECENT_KEYS)
|
||
return Fvector (total_keys, keys);
|
||
else
|
||
{
|
||
val = Fvector (NUM_RECENT_KEYS, keys);
|
||
bcopy (keys + recent_keys_index,
|
||
XVECTOR (val)->contents,
|
||
(NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object));
|
||
bcopy (keys,
|
||
XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index,
|
||
recent_keys_index * sizeof (Lisp_Object));
|
||
return val;
|
||
}
|
||
}
|
||
|
||
DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0,
|
||
"Return string of the keystrokes that invoked this command.")
|
||
()
|
||
{
|
||
return make_array (this_command_key_count, this_command_keys);
|
||
}
|
||
|
||
DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0,
|
||
"Return the current depth in recursive edits.")
|
||
()
|
||
{
|
||
Lisp_Object temp;
|
||
XFASTINT (temp) = command_loop_level + minibuf_level;
|
||
return temp;
|
||
}
|
||
|
||
DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1,
|
||
"FOpen dribble file: ",
|
||
"Start writing all keyboard characters to FILE.")
|
||
(file)
|
||
Lisp_Object file;
|
||
{
|
||
if (NILP (file))
|
||
{
|
||
fclose (dribble);
|
||
dribble = 0;
|
||
}
|
||
else
|
||
{
|
||
file = Fexpand_file_name (file, Qnil);
|
||
dribble = fopen (XSTRING (file)->data, "w");
|
||
}
|
||
return Qnil;
|
||
}
|
||
|
||
DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0,
|
||
"Discard the contents of the terminal input buffer.\n\
|
||
Also cancel any kbd macro being defined.")
|
||
()
|
||
{
|
||
defining_kbd_macro = 0;
|
||
update_mode_lines++;
|
||
|
||
unread_command_char = Qnil;
|
||
|
||
discard_tty_input ();
|
||
|
||
kbd_fetch_ptr = kbd_store_ptr;
|
||
input_pending = 0;
|
||
|
||
return Qnil;
|
||
}
|
||
|
||
DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "",
|
||
"Stop Emacs and return to superior process. You can resume later.\n\
|
||
On systems that don't have job control, run a subshell instead.\n\n\
|
||
If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\
|
||
to be read as terminal input by Emacs's superior shell.\n\
|
||
Before suspending, if `suspend-hook' is bound and value is non-nil\n\
|
||
call the value as a function of no args. Don't suspend if it returns non-nil.\n\
|
||
Otherwise, suspend normally and after resumption call\n\
|
||
`suspend-resume-hook' if that is bound and non-nil.\n\
|
||
\n\
|
||
Some operating systems cannot stop the Emacs process and resume it later.\n\
|
||
On such systems, Emacs will start a subshell and wait for it to exit.")
|
||
(stuffstring)
|
||
Lisp_Object stuffstring;
|
||
{
|
||
register Lisp_Object tem;
|
||
int count = specpdl_ptr - specpdl;
|
||
int old_height, old_width;
|
||
int width, height;
|
||
struct gcpro gcpro1;
|
||
extern init_sys_modes ();
|
||
|
||
if (!NILP (stuffstring))
|
||
CHECK_STRING (stuffstring, 0);
|
||
GCPRO1 (stuffstring);
|
||
|
||
/* Call value of suspend-hook
|
||
if it is bound and value is non-nil. */
|
||
if (!NILP (Vrun_hooks))
|
||
{
|
||
tem = call1 (Vrun_hooks, intern ("suspend-hook"));
|
||
if (!EQ (tem, Qnil)) return Qnil;
|
||
}
|
||
|
||
get_frame_size (&old_width, &old_height);
|
||
reset_sys_modes ();
|
||
/* sys_suspend can get an error if it tries to fork a subshell
|
||
and the system resources aren't available for that. */
|
||
record_unwind_protect (init_sys_modes, 0);
|
||
stuff_buffered_input (stuffstring);
|
||
sys_suspend ();
|
||
unbind_to (count, Qnil);
|
||
|
||
/* Check if terminal/window size has changed.
|
||
Note that this is not useful when we are running directly
|
||
with a window system; but suspend should be disabled in that case. */
|
||
get_frame_size (&width, &height);
|
||
if (width != old_width || height != old_height)
|
||
change_frame_size (0, height, width, 0, 0);
|
||
|
||
/* Call value of suspend-resume-hook
|
||
if it is bound and value is non-nil. */
|
||
if (!NILP (Vrun_hooks))
|
||
call1 (Vrun_hooks, intern ("suspend-resume-hook"));
|
||
|
||
UNGCPRO;
|
||
return Qnil;
|
||
}
|
||
|
||
/* If STUFFSTRING is a string, stuff its contents as pending terminal input.
|
||
Then in any case stuff anthing Emacs has read ahead and not used. */
|
||
|
||
stuff_buffered_input (stuffstring)
|
||
Lisp_Object stuffstring;
|
||
{
|
||
register unsigned char *p;
|
||
|
||
/* stuff_char works only in BSD, versions 4.2 and up. */
|
||
#ifdef BSD
|
||
#ifndef BSD4_1
|
||
if (XTYPE (stuffstring) == Lisp_String)
|
||
{
|
||
register int count;
|
||
|
||
p = XSTRING (stuffstring)->data;
|
||
count = XSTRING (stuffstring)->size;
|
||
while (count-- > 0)
|
||
stuff_char (*p++);
|
||
stuff_char ('\n');
|
||
}
|
||
/* Anything we have read ahead, put back for the shell to read. */
|
||
while (kbd_fetch_ptr != kbd_store_ptr)
|
||
{
|
||
if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE)
|
||
kbd_fetch_ptr = kbd_buffer;
|
||
if (kbd_fetch_ptr->kind == ascii_keystroke)
|
||
stuff_char (XINT (kbd_fetch_ptr->code));
|
||
kbd_fetch_ptr++;
|
||
}
|
||
input_pending = 0;
|
||
#endif
|
||
#endif /* BSD and not BSD4_1 */
|
||
}
|
||
|
||
set_waiting_for_input (time_to_clear)
|
||
EMACS_TIME *time_to_clear;
|
||
{
|
||
input_available_clear_time = time_to_clear;
|
||
|
||
/* Tell interrupt_signal to throw back to read_char, */
|
||
waiting_for_input = 1;
|
||
|
||
/* If interrupt_signal was called before and buffered a C-g,
|
||
make it run again now, to avoid timing error. */
|
||
if (!NILP (Vquit_flag))
|
||
quit_throw_to_read_char ();
|
||
|
||
/* If alarm has gone off already, echo now. */
|
||
if (echo_flag)
|
||
{
|
||
echo ();
|
||
echo_flag = 0;
|
||
}
|
||
}
|
||
|
||
clear_waiting_for_input ()
|
||
{
|
||
/* Tell interrupt_signal not to throw back to read_char, */
|
||
waiting_for_input = 0;
|
||
input_available_clear_time = 0;
|
||
}
|
||
|
||
/* This routine is called at interrupt level in response to C-G.
|
||
If interrupt_input, this is the handler for SIGINT.
|
||
Otherwise, it is called from kbd_buffer_store_event,
|
||
in handling SIGIO or SIGTINT.
|
||
|
||
If `waiting_for_input' is non zero, then unless `echoing' is nonzero,
|
||
immediately throw back to read_char.
|
||
|
||
Otherwise it sets the Lisp variable quit-flag not-nil.
|
||
This causes eval to throw, when it gets a chance.
|
||
If quit-flag is already non-nil, it stops the job right away. */
|
||
|
||
SIGTYPE
|
||
interrupt_signal ()
|
||
{
|
||
char c;
|
||
/* Must preserve main program's value of errno. */
|
||
int old_errno = errno;
|
||
extern Lisp_Object Vwindow_system;
|
||
|
||
#ifdef USG
|
||
/* USG systems forget handlers when they are used;
|
||
must reestablish each time */
|
||
signal (SIGINT, interrupt_signal);
|
||
signal (SIGQUIT, interrupt_signal);
|
||
#endif /* USG */
|
||
|
||
cancel_echoing ();
|
||
|
||
if (!NILP (Vquit_flag) && FRAME_TERMCAP_P (selected_frame))
|
||
{
|
||
fflush (stdout);
|
||
reset_sys_modes ();
|
||
sigfree ();
|
||
#ifdef SIGTSTP /* Support possible in later USG versions */
|
||
/*
|
||
* On systems which can suspend the current process and return to the original
|
||
* shell, this command causes the user to end up back at the shell.
|
||
* The "Auto-save" and "Abort" questions are not asked until
|
||
* the user elects to return to emacs, at which point he can save the current
|
||
* job and either dump core or continue.
|
||
*/
|
||
sys_suspend ();
|
||
#else
|
||
#ifdef VMS
|
||
if (sys_suspend () == -1)
|
||
{
|
||
printf ("Not running as a subprocess;\n");
|
||
printf ("you can continue or abort.\n");
|
||
}
|
||
#else /* not VMS */
|
||
/* Perhaps should really fork an inferior shell?
|
||
But that would not provide any way to get back
|
||
to the original shell, ever. */
|
||
printf ("No support for stopping a process on this operating system;\n");
|
||
printf ("you can continue or abort.\n");
|
||
#endif /* not VMS */
|
||
#endif /* not SIGTSTP */
|
||
printf ("Auto-save? (y or n) ");
|
||
fflush (stdout);
|
||
if (((c = getchar ()) & ~040) == 'Y')
|
||
Fdo_auto_save (Qnil, Qnil);
|
||
while (c != '\n') c = getchar ();
|
||
#ifdef VMS
|
||
printf ("Abort (and enter debugger)? (y or n) ");
|
||
#else /* not VMS */
|
||
printf ("Abort (and dump core)? (y or n) ");
|
||
#endif /* not VMS */
|
||
fflush (stdout);
|
||
if (((c = getchar ()) & ~040) == 'Y')
|
||
abort ();
|
||
while (c != '\n') c = getchar ();
|
||
printf ("Continuing...\n");
|
||
fflush (stdout);
|
||
init_sys_modes ();
|
||
}
|
||
else
|
||
{
|
||
/* If executing a function that wants to be interrupted out of
|
||
and the user has not deferred quitting by binding `inhibit-quit'
|
||
then quit right away. */
|
||
if (immediate_quit && NILP (Vinhibit_quit))
|
||
{
|
||
immediate_quit = 0;
|
||
sigfree ();
|
||
Fsignal (Qquit, Qnil);
|
||
}
|
||
else
|
||
/* Else request quit when it's safe */
|
||
Vquit_flag = Qt;
|
||
}
|
||
|
||
if (waiting_for_input && !echoing)
|
||
quit_throw_to_read_char ();
|
||
|
||
errno = old_errno;
|
||
}
|
||
|
||
/* Handle a C-g by making read_char return C-g. */
|
||
|
||
quit_throw_to_read_char ()
|
||
{
|
||
quit_error_check ();
|
||
sigfree ();
|
||
/* Prevent another signal from doing this before we finish. */
|
||
clear_waiting_for_input ();
|
||
input_pending = 0;
|
||
|
||
unread_command_char = Qnil;
|
||
|
||
_longjmp (getcjmp, 1);
|
||
}
|
||
|
||
DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0,
|
||
"Set mode of reading keyboard input.\n\
|
||
First arg INTERRUPT non-nil means use input interrupts;\n\
|
||
nil means use CBREAK mode.\n\
|
||
Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\
|
||
(no effect except in CBREAK mode).\n\
|
||
Third arg META non-nil means accept 8-bit input (for a Meta key).\n\
|
||
Otherwise, the top bit is ignored, on the assumption it is parity.\n\
|
||
Optional fourth arg QUIT if non-nil specifies character to use for quitting.")
|
||
(interrupt, flow, meta, quit)
|
||
Lisp_Object interrupt, flow, meta, quit;
|
||
{
|
||
if (!NILP (quit)
|
||
&& (XTYPE (quit) != Lisp_Int
|
||
|| XINT (quit) < 0 || XINT (quit) > 0400))
|
||
error ("set-input-mode: QUIT must be an ASCII character.");
|
||
|
||
reset_sys_modes ();
|
||
#ifdef SIGIO
|
||
/* Note SIGIO has been undef'd if FIONREAD is missing. */
|
||
#ifdef NO_SOCK_SIGIO
|
||
if (read_socket_hook)
|
||
interrupt_input = 0; /* No interrupts if reading from a socket. */
|
||
else
|
||
#endif /* NO_SOCK_SIGIO */
|
||
interrupt_input = !NILP (interrupt);
|
||
#else /* not SIGIO */
|
||
interrupt_input = 0;
|
||
#endif /* not SIGIO */
|
||
/* Our VMS input only works by interrupts, as of now. */
|
||
#ifdef VMS
|
||
interrupt_input = 1;
|
||
#endif
|
||
flow_control = !NILP (flow);
|
||
meta_key = !NILP (meta);
|
||
if (!NILP (quit))
|
||
/* Don't let this value be out of range. */
|
||
quit_char = XINT (quit) & (meta_key ? 0377 : 0177);
|
||
|
||
init_sys_modes ();
|
||
return Qnil;
|
||
}
|
||
|
||
init_keyboard ()
|
||
{
|
||
this_command_keys_size = 40;
|
||
this_command_keys =
|
||
(Lisp_Object *) xmalloc (this_command_keys_size * sizeof (Lisp_Object));
|
||
|
||
/* This is correct before outermost invocation of the editor loop */
|
||
command_loop_level = -1;
|
||
immediate_quit = 0;
|
||
quit_char = Ctl ('g');
|
||
unread_command_char = Qnil;
|
||
total_keys = 0;
|
||
recent_keys_index = 0;
|
||
kbd_fetch_ptr = kbd_buffer;
|
||
kbd_store_ptr = kbd_buffer;
|
||
do_mouse_tracking = 0;
|
||
input_pending = 0;
|
||
|
||
if (!noninteractive)
|
||
{
|
||
signal (SIGINT, interrupt_signal);
|
||
#ifdef HAVE_TERMIO
|
||
/* For systems with SysV TERMIO, C-g is set up for both SIGINT and
|
||
SIGQUIT and we can't tell which one it will give us. */
|
||
signal (SIGQUIT, interrupt_signal);
|
||
#endif /* HAVE_TERMIO */
|
||
/* Note SIGIO has been undef'd if FIONREAD is missing. */
|
||
#ifdef SIGIO
|
||
signal (SIGIO, input_available_signal);
|
||
#endif /* SIGIO */
|
||
}
|
||
|
||
/* Use interrupt input by default, if it works and noninterrupt input
|
||
has deficiencies. */
|
||
|
||
#ifdef INTERRUPT_INPUT
|
||
interrupt_input = 1;
|
||
#else
|
||
interrupt_input = 0;
|
||
#endif
|
||
|
||
/* Our VMS input only works by interrupts, as of now. */
|
||
#ifdef VMS
|
||
interrupt_input = 1;
|
||
#endif
|
||
|
||
sigfree ();
|
||
dribble = 0;
|
||
|
||
if (keyboard_init_hook)
|
||
(*keyboard_init_hook) ();
|
||
|
||
#ifdef POLL_FOR_INPUT
|
||
poll_suppress_count = 1;
|
||
start_polling ();
|
||
#endif
|
||
}
|
||
|
||
/* This type's only use is in syms_of_keyboard, to initialize the
|
||
event header symbols and put properties on them. */
|
||
struct event_head {
|
||
Lisp_Object *var;
|
||
char *name;
|
||
Lisp_Object *kind;
|
||
};
|
||
|
||
struct event_head head_table[] = {
|
||
&Qmouse_movement, "mouse-movement", &Qmouse_movement,
|
||
&Qvscrollbar_part, "vscrollbar-part", &Qscrollbar_click,
|
||
&Qvslider_part, "vslider-part", &Qscrollbar_click,
|
||
&Qvthumbup_part, "vthumbup-part", &Qscrollbar_click,
|
||
&Qvthumbdown_part, "vthumbdown-part", &Qscrollbar_click,
|
||
&Qhscrollbar_part, "hscrollbar-part", &Qscrollbar_click,
|
||
&Qhslider_part, "hslider-part", &Qscrollbar_click,
|
||
&Qhthumbleft_part, "hthumbleft-part", &Qscrollbar_click,
|
||
&Qhthumbright_part,"hthumbright-part", &Qscrollbar_click
|
||
};
|
||
|
||
syms_of_keyboard ()
|
||
{
|
||
Qself_insert_command = intern ("self-insert-command");
|
||
staticpro (&Qself_insert_command);
|
||
|
||
Qforward_char = intern ("forward-char");
|
||
staticpro (&Qforward_char);
|
||
|
||
Qbackward_char = intern ("backward-char");
|
||
staticpro (&Qbackward_char);
|
||
|
||
Qdisabled = intern ("disabled");
|
||
staticpro (&Qdisabled);
|
||
|
||
Qfunction_key = intern ("function-key");
|
||
staticpro (&Qfunction_key);
|
||
Qmouse_movement = intern ("mouse-click");
|
||
staticpro (&Qmouse_click);
|
||
Qmouse_movement = intern ("scrollbar-click");
|
||
staticpro (&Qmouse_movement);
|
||
|
||
Qmode_line = intern ("mode-line");
|
||
staticpro (&Qmode_line);
|
||
Qvertical_line = intern ("vertical-line");
|
||
staticpro (&Qvertical_line);
|
||
|
||
Qevent_kind = intern ("event-type");
|
||
staticpro (&Qevent_kind);
|
||
Qevent_unmodified = intern ("event-unmodified");
|
||
staticpro (&Qevent_unmodified);
|
||
|
||
{
|
||
struct event_head *p;
|
||
|
||
for (p = head_table;
|
||
p < head_table + (sizeof (head_table) / sizeof (head_table[0]));
|
||
p++)
|
||
{
|
||
*p->var = intern (p->name);
|
||
staticpro (p->var);
|
||
Fput (*p->var, Qevent_kind, *p->kind);
|
||
Fput (*p->var, Qevent_unmodified, *p->var);
|
||
}
|
||
}
|
||
|
||
recent_keys = Fmake_vector (make_number (NUM_RECENT_KEYS), Qnil);
|
||
staticpro (&recent_keys);
|
||
|
||
func_key_syms = Qnil;
|
||
staticpro (&func_key_syms);
|
||
|
||
mouse_syms = Qnil;
|
||
staticpro (&mouse_syms);
|
||
|
||
defsubr (&Sread_key_sequence);
|
||
defsubr (&Srecursive_edit);
|
||
defsubr (&Strack_mouse);
|
||
defsubr (&Smouse_click_p);
|
||
defsubr (&Sinput_pending_p);
|
||
defsubr (&Scommand_execute);
|
||
defsubr (&Srecent_keys);
|
||
defsubr (&Sthis_command_keys);
|
||
defsubr (&Ssuspend_emacs);
|
||
defsubr (&Sabort_recursive_edit);
|
||
defsubr (&Sexit_recursive_edit);
|
||
defsubr (&Srecursion_depth);
|
||
defsubr (&Stop_level);
|
||
defsubr (&Sdiscard_input);
|
||
defsubr (&Sopen_dribble_file);
|
||
defsubr (&Sset_input_mode);
|
||
defsubr (&Sexecute_extended_command);
|
||
|
||
DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook,
|
||
"Value is called instead of any command that is disabled\n\
|
||
\(has a non-nil `disabled' property).");
|
||
|
||
DEFVAR_LISP ("last-command-char", &last_command_char,
|
||
"Last terminal input key that was part of a command.");
|
||
|
||
DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event,
|
||
"Last terminal input key in a command, except for mouse menus.\n\
|
||
Mouse menus give back keys that don't look like mouse events;\n\
|
||
this variable holds the actual mouse event that led to the menu,\n\
|
||
so that you can determine whether the command was run by mouse or not.");
|
||
|
||
DEFVAR_LISP ("last-input-char", &last_input_char,
|
||
"Last terminal input key.");
|
||
|
||
DEFVAR_LISP ("unread-command-char", &unread_command_char,
|
||
"Object to be read as next input from input stream, or nil if none.");
|
||
|
||
DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char,
|
||
"Meta-prefix character code. Meta-foo as command input\n\
|
||
turns into this character followed by foo.");
|
||
XSET (meta_prefix_char, Lisp_Int, 033);
|
||
|
||
DEFVAR_LISP ("last-command", &last_command,
|
||
"The last command executed. Normally a symbol with a function definition,\n\
|
||
but can be whatever was found in the keymap, or whatever the variable\n\
|
||
`this-command' was set to by that command.");
|
||
last_command = Qnil;
|
||
|
||
DEFVAR_LISP ("this-command", &this_command,
|
||
"The command now being executed.\n\
|
||
The command can set this variable; whatever is put here\n\
|
||
will be in `last-command' during the following command.");
|
||
this_command = Qnil;
|
||
|
||
DEFVAR_INT ("auto-save-interval", &auto_save_interval,
|
||
"*Number of keyboard input characters between auto-saves.\n\
|
||
Zero means disable autosaving due to number of characters typed.");
|
||
auto_save_interval = 300;
|
||
|
||
DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout,
|
||
"*Number of seconds idle time before auto-save.\n\
|
||
Zero or nil means disable auto-saving due to idleness.\n\
|
||
After auto-saving due to this many seconds of idle time,\n\
|
||
Emacs also does a garbage collection if that seems to be warranted.");
|
||
XFASTINT (Vauto_save_timeout) = 30;
|
||
|
||
DEFVAR_INT ("echo-keystrokes", &echo_keystrokes,
|
||
"*Nonzero means echo unfinished commands after this many seconds of pause.");
|
||
echo_keystrokes = 1;
|
||
|
||
DEFVAR_INT ("polling-period", &polling_period,
|
||
"*Interval between polling for input during Lisp execution.\n\
|
||
The reason for polling is to make C-g work to stop a running program.\n\
|
||
Polling is needed only when using X windows and SIGIO does not work.\n\
|
||
Polling is automatically disabled in all other cases.");
|
||
polling_period = 2;
|
||
|
||
DEFVAR_INT ("num-input-keys", &num_input_keys,
|
||
"*Number of complete keys read from the keyboard so far.");
|
||
num_input_keys = 0;
|
||
|
||
#ifdef MULTI_FRAME
|
||
DEFVAR_LISP ("last-event-frame", &Vlast_event_frame,
|
||
"*The frame in which the most recently read event occurred.\n\
|
||
If the last event came from a keyboard macro, this is set to `macro'.");
|
||
Vlast_event_frame = Qnil;
|
||
#endif
|
||
|
||
DEFVAR_LISP ("help-char", &help_char,
|
||
"Character to recognize as meaning Help.\n\
|
||
When it is read, do `(eval help-form)', and display result if it's a string.\n\
|
||
If the value of `help-form' is nil, this char can be read normally.");
|
||
XSET (help_char, Lisp_Int, Ctl ('H'));
|
||
|
||
DEFVAR_LISP ("help-form", &Vhelp_form,
|
||
"Form to execute when character help-char is read.\n\
|
||
If the form returns a string, that string is displayed.\n\
|
||
If `help-form' is nil, the help char is not recognized.");
|
||
Vhelp_form = Qnil;
|
||
|
||
DEFVAR_LISP ("top-level", &Vtop_level,
|
||
"Form to evaluate when Emacs starts up.\n\
|
||
Useful to set before you dump a modified Emacs.");
|
||
Vtop_level = Qnil;
|
||
|
||
DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table,
|
||
"String used as translate table for keyboard input, or nil.\n\
|
||
Each character is looked up in this string and the contents used instead.\n\
|
||
If string is of length N, character codes N and up are untranslated.");
|
||
Vkeyboard_translate_table = Qnil;
|
||
|
||
DEFVAR_BOOL ("menu-prompting", &menu_prompting,
|
||
"Non-nil means prompt with menus when appropriate.\n\
|
||
This is done when reading from a keymap that has a prompt string,\n\
|
||
for elements that have prompt strings.\n\
|
||
The menu is displayed on the screen\n\
|
||
if X menus were enabled at configuration\n\
|
||
time and the previous event was a mouse click prefix key.\n\
|
||
Otherwise, menu prompting uses the echo area.");
|
||
menu_prompting = 1;
|
||
|
||
DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char,
|
||
"Character to see next line of menu prompt.\n\
|
||
Type this character while in a menu prompt to rotate around the lines of it.");
|
||
XSET (menu_prompt_more_char, Lisp_Int, ' ');
|
||
}
|
||
|
||
keys_of_keyboard ()
|
||
{
|
||
initial_define_key (global_map, Ctl ('Z'), "suspend-emacs");
|
||
initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs");
|
||
initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit");
|
||
initial_define_key (global_map, Ctl (']'), "abort-recursive-edit");
|
||
initial_define_key (meta_map, 'x', "execute-extended-command");
|
||
}
|