1550 lines
28 KiB
C
1550 lines
28 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (C) 1984-2000 Mark Nudelman
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Less License, as specified in the README file.
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*
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* For more information about less, or for information on how to
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* contact the author, see the README file.
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*/
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/*
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* User-level command processor.
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*/
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#include "less.h"
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#include "position.h"
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#include "option.h"
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#include "cmd.h"
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extern int erase_char, kill_char;
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extern int sigs;
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extern int quit_at_eof;
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extern int quit_if_one_screen;
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extern int squished;
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extern int hit_eof;
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extern int sc_width;
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extern int sc_height;
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extern int swindow;
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extern int jump_sline;
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extern int quitting;
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extern int wscroll;
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extern int top_scroll;
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extern int ignore_eoi;
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extern int secure;
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extern int hshift;
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extern int show_attn;
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extern int more_mode;
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extern char *every_first_cmd;
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extern char *curr_altfilename;
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extern char version[];
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extern struct scrpos initial_scrpos;
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extern IFILE curr_ifile;
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extern void constant *ml_search;
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extern void constant *ml_examine;
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#if SHELL_ESCAPE || PIPEC
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extern void constant *ml_shell;
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#endif
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#if EDITOR
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extern char *editor;
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extern char *editproto;
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#endif
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extern int screen_trashed; /* The screen has been overwritten */
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static char ungot[UNGOT_SIZE];
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static char *ungotp = NULL;
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#if SHELL_ESCAPE
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static char *shellcmd = NULL; /* For holding last shell command for "!!" */
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#endif
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static int mca; /* The multicharacter command (action) */
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static int search_type; /* The previous type of search */
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static int number; /* The number typed by the user */
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static char optchar;
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static int optflag;
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static int optgetname;
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static POSITION bottompos;
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#if PIPEC
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static char pipec;
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#endif
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static void multi_search();
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/*
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* Move the cursor to lower left before executing a command.
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* This looks nicer if the command takes a long time before
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* updating the screen.
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*/
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static void
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cmd_exec()
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{
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clear_attn();
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lower_left();
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flush();
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}
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/*
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* Set up the display to start a new multi-character command.
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*/
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static void
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start_mca(action, prompt, mlist, cmdflags)
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int action;
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char *prompt;
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void *mlist;
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int cmdflags;
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{
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mca = action;
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clear_cmd();
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cmd_putstr(prompt);
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set_mlist(mlist, cmdflags);
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}
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public int
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in_mca()
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{
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return (mca != 0 && mca != A_PREFIX);
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}
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/*
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* Set up the display to start a new search command.
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*/
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static void
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mca_search()
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{
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if (search_type & SRCH_FORW)
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mca = A_F_SEARCH;
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else
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mca = A_B_SEARCH;
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clear_cmd();
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if (search_type & SRCH_NO_MATCH)
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cmd_putstr("Non-match ");
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if (search_type & SRCH_FIRST_FILE)
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cmd_putstr("First-file ");
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if (search_type & SRCH_PAST_EOF)
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cmd_putstr("EOF-ignore ");
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if (search_type & SRCH_NO_MOVE)
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cmd_putstr("Keep-pos ");
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if (search_type & SRCH_NO_REGEX)
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cmd_putstr("Regex-off ");
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if (search_type & SRCH_FORW)
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cmd_putstr("/");
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else
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cmd_putstr("?");
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set_mlist(ml_search, 0);
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}
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/*
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* Set up the display to start a new toggle-option command.
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*/
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static void
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mca_opt_toggle()
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{
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int no_prompt;
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int flag;
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char *dash;
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no_prompt = (optflag & OPT_NO_PROMPT);
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flag = (optflag & ~OPT_NO_PROMPT);
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dash = (flag == OPT_NO_TOGGLE) ? "_" : "-";
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mca = A_OPT_TOGGLE;
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clear_cmd();
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cmd_putstr(dash);
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if (optgetname)
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cmd_putstr(dash);
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if (no_prompt)
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cmd_putstr("(P)");
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switch (flag)
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{
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case OPT_UNSET:
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cmd_putstr("+");
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break;
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case OPT_SET:
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cmd_putstr("!");
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break;
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}
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set_mlist(NULL, 0);
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}
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/*
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* Execute a multicharacter command.
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*/
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static void
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exec_mca()
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{
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register char *cbuf;
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cmd_exec();
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cbuf = get_cmdbuf();
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switch (mca)
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{
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case A_F_SEARCH:
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case A_B_SEARCH:
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multi_search(cbuf, number);
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break;
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case A_FIRSTCMD:
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/*
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* Skip leading spaces or + signs in the string.
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*/
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while (*cbuf == '+' || *cbuf == ' ')
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cbuf++;
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if (every_first_cmd != NULL)
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free(every_first_cmd);
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if (*cbuf == '\0')
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every_first_cmd = NULL;
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else
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every_first_cmd = save(cbuf);
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break;
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case A_OPT_TOGGLE:
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toggle_option(optchar, cbuf, optflag);
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optchar = '\0';
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break;
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case A_F_BRACKET:
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match_brac(cbuf[0], cbuf[1], 1, number);
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break;
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case A_B_BRACKET:
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match_brac(cbuf[1], cbuf[0], 0, number);
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break;
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#if EXAMINE
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case A_EXAMINE:
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if (secure)
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break;
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edit_list(cbuf);
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break;
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#endif
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#if SHELL_ESCAPE
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case A_SHELL:
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/*
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* !! just uses whatever is in shellcmd.
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* Otherwise, copy cmdbuf to shellcmd,
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* expanding any special characters ("%" or "#").
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*/
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if (*cbuf != '!')
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{
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if (shellcmd != NULL)
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free(shellcmd);
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shellcmd = fexpand(cbuf);
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}
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if (secure)
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break;
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if (shellcmd == NULL)
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lsystem("", "!done");
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else
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lsystem(shellcmd, "!done");
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break;
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#endif
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#if PIPEC
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case A_PIPE:
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if (secure)
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break;
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(void) pipe_mark(pipec, cbuf);
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error("|done", NULL_PARG);
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break;
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#endif
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}
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}
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/*
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* Add a character to a multi-character command.
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*/
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static int
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mca_char(c)
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int c;
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{
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char *p;
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int flag;
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char buf[3];
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PARG parg;
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switch (mca)
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{
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case 0:
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/*
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* Not in a multicharacter command.
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*/
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return (NO_MCA);
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case A_PREFIX:
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/*
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* In the prefix of a command.
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* This not considered a multichar command
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* (even tho it uses cmdbuf, etc.).
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* It is handled in the commands() switch.
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*/
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return (NO_MCA);
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case A_DIGIT:
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/*
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* Entering digits of a number.
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* Terminated by a non-digit.
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*/
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if ((c < '0' || c > '9') &&
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editchar(c, EC_PEEK|EC_NOHISTORY|EC_NOCOMPLETE) == A_INVALID)
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{
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/*
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* Not part of the number.
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* Treat as a normal command character.
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*/
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number = cmd_int();
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mca = 0;
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cmd_accept();
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return (NO_MCA);
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}
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break;
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case A_OPT_TOGGLE:
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/*
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* Special case for the TOGGLE_OPTION command.
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* If the option letter which was entered is a
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* single-char option, execute the command immediately,
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* so user doesn't have to hit RETURN.
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* If the first char is + or -, this indicates
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* OPT_UNSET or OPT_SET respectively, instead of OPT_TOGGLE.
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* "--" begins inputting a long option name.
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*/
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if (optchar == '\0' && len_cmdbuf() == 0)
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{
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flag = (optflag & ~OPT_NO_PROMPT);
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if (flag == OPT_NO_TOGGLE)
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{
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switch (c)
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{
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case '_':
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/* "__" = long option name. */
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optgetname = TRUE;
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mca_opt_toggle();
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return (MCA_MORE);
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}
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} else
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{
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switch (c)
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{
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case '+':
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/* "-+" = UNSET. */
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optflag = (flag == OPT_UNSET) ?
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OPT_TOGGLE : OPT_UNSET;
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mca_opt_toggle();
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return (MCA_MORE);
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case '!':
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/* "-!" = SET */
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optflag = (flag == OPT_SET) ?
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OPT_TOGGLE : OPT_SET;
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mca_opt_toggle();
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return (MCA_MORE);
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case CONTROL('P'):
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optflag ^= OPT_NO_PROMPT;
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mca_opt_toggle();
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return (MCA_MORE);
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case '-':
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/* "--" = long option name. */
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optgetname = TRUE;
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mca_opt_toggle();
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return (MCA_MORE);
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}
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}
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}
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if (optgetname)
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{
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/*
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* We're getting a long option name.
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* See if we've matched an option name yet.
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* If so, display the complete name and stop
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* accepting chars until user hits RETURN.
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*/
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struct option *o;
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char *oname;
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int lc;
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if (c == '\n' || c == '\r')
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{
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/*
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* When the user hits RETURN, make sure
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* we've matched an option name, then
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* pretend he just entered the equivalent
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* option letter.
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*/
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if (optchar == '\0')
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{
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parg.p_string = get_cmdbuf();
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error("There is no --%s option", &parg);
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return (MCA_DONE);
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}
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optgetname = FALSE;
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cmd_reset();
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c = optchar;
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} else
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{
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if (optchar != '\0')
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{
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/*
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* Already have a match for the name.
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* Don't accept anything but erase/kill.
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*/
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if (c == erase_char || c == kill_char)
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return (MCA_DONE);
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return (MCA_MORE);
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}
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/*
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* Add char to cmd buffer and try to match
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* the option name.
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*/
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if (cmd_char(c) == CC_QUIT)
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return (MCA_DONE);
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p = get_cmdbuf();
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lc = islower(p[0]);
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o = findopt_name(&p, &oname, NULL);
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if (o != NULL)
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{
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/*
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* Got a match.
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* Remember the option letter and
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* display the full option name.
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*/
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optchar = o->oletter;
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if (!lc && islower(optchar))
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optchar = toupper(optchar);
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cmd_reset();
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mca_opt_toggle();
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for (p = oname; *p != '\0'; p++)
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{
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c = *p;
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if (!lc && islower(c))
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c = toupper(c);
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if (cmd_char(c) != CC_OK)
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return (MCA_DONE);
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}
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}
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return (MCA_MORE);
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}
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} else
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{
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if (c == erase_char || c == kill_char)
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break;
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if (optchar != '\0')
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/* We already have the option letter. */
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break;
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}
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optchar = c;
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if ((optflag & ~OPT_NO_PROMPT) != OPT_TOGGLE ||
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single_char_option(c))
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{
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toggle_option(c, "", optflag);
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return (MCA_DONE);
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}
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/*
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* Display a prompt appropriate for the option letter.
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*/
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if ((p = opt_prompt(c)) == NULL)
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{
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buf[0] = '-';
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buf[1] = c;
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buf[2] = '\0';
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p = buf;
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}
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start_mca(A_OPT_TOGGLE, p, (void*)NULL, 0);
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return (MCA_MORE);
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case A_F_SEARCH:
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case A_B_SEARCH:
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/*
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* Special case for search commands.
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* Certain characters as the first char of
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* the pattern have special meaning:
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* ! Toggle the NO_MATCH flag
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* * Toggle the PAST_EOF flag
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* @ Toggle the FIRST_FILE flag
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*/
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if (len_cmdbuf() > 0)
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/*
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* Only works for the first char of the pattern.
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*/
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break;
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flag = 0;
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switch (c)
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{
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case '*':
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if (more_mode)
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break;
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case CONTROL('E'): /* ignore END of file */
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flag = SRCH_PAST_EOF;
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break;
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case '@':
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if (more_mode)
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break;
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case CONTROL('F'): /* FIRST file */
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flag = SRCH_FIRST_FILE;
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break;
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case CONTROL('K'): /* KEEP position */
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flag = SRCH_NO_MOVE;
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break;
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case CONTROL('R'): /* Don't use REGULAR EXPRESSIONS */
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flag = SRCH_NO_REGEX;
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break;
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case CONTROL('N'): /* NOT match */
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case '!':
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flag = SRCH_NO_MATCH;
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break;
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}
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if (flag != 0)
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{
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search_type ^= flag;
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mca_search();
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return (MCA_MORE);
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}
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break;
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}
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/*
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* Any other multicharacter command
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* is terminated by a newline.
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*/
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if (c == '\n' || c == '\r')
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{
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/*
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* Execute the command.
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*/
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exec_mca();
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return (MCA_DONE);
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}
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/*
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* Append the char to the command buffer.
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*/
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if (cmd_char(c) == CC_QUIT)
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/*
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* Abort the multi-char command.
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*/
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return (MCA_DONE);
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if ((mca == A_F_BRACKET || mca == A_B_BRACKET) && len_cmdbuf() >= 2)
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{
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/*
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* Special case for the bracket-matching commands.
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* Execute the command after getting exactly two
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* characters from the user.
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*/
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exec_mca();
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return (MCA_DONE);
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}
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/*
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* Need another character.
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*/
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return (MCA_MORE);
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}
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|
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/*
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* Make sure the screen is displayed.
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*/
|
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static void
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make_display()
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{
|
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/*
|
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* If nothing is displayed yet, display starting from initial_scrpos.
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*/
|
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if (empty_screen())
|
|
{
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if (initial_scrpos.pos == NULL_POSITION)
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/*
|
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* {{ Maybe this should be:
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* jump_loc(ch_zero(), jump_sline);
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* but this behavior seems rather unexpected
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* on the first screen. }}
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*/
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jump_loc(ch_zero(), 1);
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else
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jump_loc(initial_scrpos.pos, initial_scrpos.ln);
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} else if (screen_trashed)
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{
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int save_top_scroll;
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save_top_scroll = top_scroll;
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top_scroll = 1;
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repaint();
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top_scroll = save_top_scroll;
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}
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}
|
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|
|
/*
|
|
* Display the appropriate prompt.
|
|
*/
|
|
static void
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prompt()
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|
{
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register char *p;
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|
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if (ungotp != NULL && ungotp > ungot)
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{
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/*
|
|
* No prompt necessary if commands are from
|
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* ungotten chars rather than from the user.
|
|
*/
|
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return;
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}
|
|
|
|
/*
|
|
* Make sure the screen is displayed.
|
|
*/
|
|
make_display();
|
|
bottompos = position(BOTTOM_PLUS_ONE);
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|
|
/*
|
|
* If the -E flag is set and we've hit EOF on the last file, quit.
|
|
*/
|
|
if ((quit_at_eof == OPT_ONPLUS || quit_if_one_screen) &&
|
|
hit_eof && !(ch_getflags() & CH_HELPFILE) &&
|
|
next_ifile(curr_ifile) == NULL_IFILE)
|
|
quit(QUIT_OK);
|
|
quit_if_one_screen = FALSE;
|
|
#if 0 /* This doesn't work well because some "te"s clear the screen. */
|
|
/*
|
|
* If the -e flag is set and we've hit EOF on the last file,
|
|
* and the file is squished (shorter than the screen), quit.
|
|
*/
|
|
if (quit_at_eof && squished &&
|
|
next_ifile(curr_ifile) == NULL_IFILE)
|
|
quit(QUIT_OK);
|
|
#endif
|
|
|
|
/*
|
|
* Select the proper prompt and display it.
|
|
*/
|
|
clear_cmd();
|
|
p = pr_string();
|
|
if (p == NULL)
|
|
putchr(':');
|
|
else
|
|
{
|
|
so_enter();
|
|
putstr(p);
|
|
so_exit();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Display the less version message.
|
|
*/
|
|
public void
|
|
dispversion()
|
|
{
|
|
PARG parg;
|
|
|
|
parg.p_string = version;
|
|
error("less %s", &parg);
|
|
}
|
|
|
|
/*
|
|
* Get command character.
|
|
* The character normally comes from the keyboard,
|
|
* but may come from ungotten characters
|
|
* (characters previously given to ungetcc or ungetsc).
|
|
*/
|
|
public int
|
|
getcc()
|
|
{
|
|
if (ungotp == NULL)
|
|
/*
|
|
* Normal case: no ungotten chars, so get one from the user.
|
|
*/
|
|
return (getchr());
|
|
|
|
if (ungotp > ungot)
|
|
/*
|
|
* Return the next ungotten char.
|
|
*/
|
|
return (*--ungotp);
|
|
|
|
/*
|
|
* We have just run out of ungotten chars.
|
|
*/
|
|
ungotp = NULL;
|
|
if (len_cmdbuf() == 0 || !empty_screen())
|
|
return (getchr());
|
|
/*
|
|
* Command is incomplete, so try to complete it.
|
|
*/
|
|
switch (mca)
|
|
{
|
|
case A_DIGIT:
|
|
/*
|
|
* We have a number but no command. Treat as #g.
|
|
*/
|
|
return ('g');
|
|
|
|
case A_F_SEARCH:
|
|
case A_B_SEARCH:
|
|
/*
|
|
* We have "/string" but no newline. Add the \n.
|
|
*/
|
|
return ('\n');
|
|
|
|
default:
|
|
/*
|
|
* Some other incomplete command. Let user complete it.
|
|
*/
|
|
return (getchr());
|
|
}
|
|
}
|
|
|
|
/*
|
|
* "Unget" a command character.
|
|
* The next getcc() will return this character.
|
|
*/
|
|
public void
|
|
ungetcc(c)
|
|
int c;
|
|
{
|
|
if (ungotp == NULL)
|
|
ungotp = ungot;
|
|
if (ungotp >= ungot + sizeof(ungot))
|
|
{
|
|
error("ungetcc overflow", NULL_PARG);
|
|
quit(QUIT_ERROR);
|
|
}
|
|
*ungotp++ = c;
|
|
}
|
|
|
|
/*
|
|
* Unget a whole string of command characters.
|
|
* The next sequence of getcc()'s will return this string.
|
|
*/
|
|
public void
|
|
ungetsc(s)
|
|
char *s;
|
|
{
|
|
register char *p;
|
|
|
|
for (p = s + strlen(s) - 1; p >= s; p--)
|
|
ungetcc(*p);
|
|
}
|
|
|
|
/*
|
|
* Search for a pattern, possibly in multiple files.
|
|
* If SRCH_FIRST_FILE is set, begin searching at the first file.
|
|
* If SRCH_PAST_EOF is set, continue the search thru multiple files.
|
|
*/
|
|
static void
|
|
multi_search(pattern, n)
|
|
char *pattern;
|
|
int n;
|
|
{
|
|
register int nomore;
|
|
IFILE save_ifile;
|
|
int changed_file;
|
|
|
|
changed_file = 0;
|
|
save_ifile = save_curr_ifile();
|
|
|
|
if (search_type & SRCH_FIRST_FILE)
|
|
{
|
|
/*
|
|
* Start at the first (or last) file
|
|
* in the command line list.
|
|
*/
|
|
if (search_type & SRCH_FORW)
|
|
nomore = edit_first();
|
|
else
|
|
nomore = edit_last();
|
|
if (nomore)
|
|
{
|
|
unsave_ifile(save_ifile);
|
|
return;
|
|
}
|
|
changed_file = 1;
|
|
search_type &= ~SRCH_FIRST_FILE;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
n = search(search_type, pattern, n);
|
|
/*
|
|
* The SRCH_NO_MOVE flag doesn't "stick": it gets cleared
|
|
* after being used once. This allows "n" to work after
|
|
* using a /@@ search.
|
|
*/
|
|
search_type &= ~SRCH_NO_MOVE;
|
|
if (n == 0)
|
|
{
|
|
/*
|
|
* Found it.
|
|
*/
|
|
unsave_ifile(save_ifile);
|
|
return;
|
|
}
|
|
|
|
if (n < 0)
|
|
/*
|
|
* Some kind of error in the search.
|
|
* Error message has been printed by search().
|
|
*/
|
|
break;
|
|
|
|
if ((search_type & SRCH_PAST_EOF) == 0)
|
|
/*
|
|
* We didn't find a match, but we're
|
|
* supposed to search only one file.
|
|
*/
|
|
break;
|
|
/*
|
|
* Move on to the next file.
|
|
*/
|
|
if (search_type & SRCH_FORW)
|
|
nomore = edit_next(1);
|
|
else
|
|
nomore = edit_prev(1);
|
|
if (nomore)
|
|
break;
|
|
changed_file = 1;
|
|
}
|
|
|
|
/*
|
|
* Didn't find it.
|
|
* Print an error message if we haven't already.
|
|
*/
|
|
if (n > 0)
|
|
error("Pattern not found", NULL_PARG);
|
|
|
|
if (changed_file)
|
|
{
|
|
/*
|
|
* Restore the file we were originally viewing.
|
|
*/
|
|
reedit_ifile(save_ifile);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Main command processor.
|
|
* Accept and execute commands until a quit command.
|
|
*/
|
|
public void
|
|
commands()
|
|
{
|
|
register int c;
|
|
register int action;
|
|
register char *cbuf;
|
|
int newaction;
|
|
int save_search_type;
|
|
char *extra;
|
|
char tbuf[2];
|
|
PARG parg;
|
|
IFILE old_ifile;
|
|
IFILE new_ifile;
|
|
|
|
search_type = SRCH_FORW;
|
|
wscroll = (sc_height + 1) / 2;
|
|
newaction = A_NOACTION;
|
|
|
|
for (;;)
|
|
{
|
|
mca = 0;
|
|
cmd_accept();
|
|
number = 0;
|
|
optchar = '\0';
|
|
|
|
/*
|
|
* See if any signals need processing.
|
|
*/
|
|
if (sigs)
|
|
{
|
|
psignals();
|
|
if (quitting)
|
|
quit(QUIT_SAVED_STATUS);
|
|
}
|
|
|
|
/*
|
|
* See if window size changed, for systems that don't
|
|
* generate SIGWINCH.
|
|
*/
|
|
check_winch();
|
|
|
|
/*
|
|
* Display prompt and accept a character.
|
|
*/
|
|
cmd_reset();
|
|
prompt();
|
|
if (sigs)
|
|
continue;
|
|
if (newaction == A_NOACTION)
|
|
c = getcc();
|
|
|
|
again:
|
|
if (sigs)
|
|
continue;
|
|
|
|
if (newaction != A_NOACTION)
|
|
{
|
|
action = newaction;
|
|
newaction = A_NOACTION;
|
|
} else
|
|
{
|
|
/*
|
|
* If we are in a multicharacter command, call mca_char.
|
|
* Otherwise we call fcmd_decode to determine the
|
|
* action to be performed.
|
|
*/
|
|
if (mca)
|
|
switch (mca_char(c))
|
|
{
|
|
case MCA_MORE:
|
|
/*
|
|
* Need another character.
|
|
*/
|
|
c = getcc();
|
|
goto again;
|
|
case MCA_DONE:
|
|
/*
|
|
* Command has been handled by mca_char.
|
|
* Start clean with a prompt.
|
|
*/
|
|
continue;
|
|
case NO_MCA:
|
|
/*
|
|
* Not a multi-char command
|
|
* (at least, not anymore).
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Decode the command character and decide what to do.
|
|
*/
|
|
if (mca)
|
|
{
|
|
/*
|
|
* We're in a multichar command.
|
|
* Add the character to the command buffer
|
|
* and display it on the screen.
|
|
* If the user backspaces past the start
|
|
* of the line, abort the command.
|
|
*/
|
|
if (cmd_char(c) == CC_QUIT || len_cmdbuf() == 0)
|
|
continue;
|
|
cbuf = get_cmdbuf();
|
|
} else
|
|
{
|
|
/*
|
|
* Don't use cmd_char if we're starting fresh
|
|
* at the beginning of a command, because we
|
|
* don't want to echo the command until we know
|
|
* it is a multichar command. We also don't
|
|
* want erase_char/kill_char to be treated
|
|
* as line editing characters.
|
|
*/
|
|
tbuf[0] = c;
|
|
tbuf[1] = '\0';
|
|
cbuf = tbuf;
|
|
}
|
|
extra = NULL;
|
|
action = fcmd_decode(cbuf, &extra);
|
|
/*
|
|
* If an "extra" string was returned,
|
|
* process it as a string of command characters.
|
|
*/
|
|
if (extra != NULL)
|
|
ungetsc(extra);
|
|
}
|
|
/*
|
|
* Clear the cmdbuf string.
|
|
* (But not if we're in the prefix of a command,
|
|
* because the partial command string is kept there.)
|
|
*/
|
|
if (action != A_PREFIX)
|
|
cmd_reset();
|
|
|
|
switch (action)
|
|
{
|
|
case A_DIGIT:
|
|
/*
|
|
* First digit of a number.
|
|
*/
|
|
start_mca(A_DIGIT, ":", (void*)NULL, CF_QUIT_ON_ERASE);
|
|
goto again;
|
|
|
|
case A_F_WINDOW:
|
|
/*
|
|
* Forward one window (and set the window size).
|
|
*/
|
|
if (number > 0)
|
|
swindow = number;
|
|
/* FALLTHRU */
|
|
case A_F_SCREEN:
|
|
/*
|
|
* Forward one screen.
|
|
*/
|
|
if (number <= 0)
|
|
number = get_swindow();
|
|
cmd_exec();
|
|
if (show_attn)
|
|
set_attnpos(bottompos);
|
|
forward(number, 0, 1);
|
|
break;
|
|
|
|
case A_B_WINDOW:
|
|
/*
|
|
* Backward one window (and set the window size).
|
|
*/
|
|
if (number > 0)
|
|
swindow = number;
|
|
/* FALLTHRU */
|
|
case A_B_SCREEN:
|
|
/*
|
|
* Backward one screen.
|
|
*/
|
|
if (number <= 0)
|
|
number = get_swindow();
|
|
cmd_exec();
|
|
backward(number, 0, 1);
|
|
break;
|
|
|
|
case A_F_LINE:
|
|
/*
|
|
* Forward N (default 1) line.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
cmd_exec();
|
|
if (show_attn == OPT_ONPLUS && number > 1)
|
|
set_attnpos(bottompos);
|
|
forward(number, 0, 0);
|
|
break;
|
|
|
|
case A_B_LINE:
|
|
/*
|
|
* Backward N (default 1) line.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
cmd_exec();
|
|
backward(number, 0, 0);
|
|
break;
|
|
|
|
case A_FF_LINE:
|
|
/*
|
|
* Force forward N (default 1) line.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
cmd_exec();
|
|
if (show_attn == OPT_ONPLUS && number > 1)
|
|
set_attnpos(bottompos);
|
|
forward(number, 1, 0);
|
|
break;
|
|
|
|
case A_BF_LINE:
|
|
/*
|
|
* Force backward N (default 1) line.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
cmd_exec();
|
|
backward(number, 1, 0);
|
|
break;
|
|
|
|
case A_FF_SCREEN:
|
|
/*
|
|
* Force forward one screen.
|
|
*/
|
|
if (number <= 0)
|
|
number = get_swindow();
|
|
cmd_exec();
|
|
if (show_attn == OPT_ONPLUS)
|
|
set_attnpos(bottompos);
|
|
forward(number, 1, 0);
|
|
break;
|
|
|
|
case A_F_FOREVER:
|
|
/*
|
|
* Forward forever, ignoring EOF.
|
|
*/
|
|
if (ch_getflags() & CH_HELPFILE)
|
|
break;
|
|
cmd_exec();
|
|
jump_forw();
|
|
ignore_eoi = 1;
|
|
hit_eof = 0;
|
|
while (!sigs)
|
|
forward(1, 0, 0);
|
|
ignore_eoi = 0;
|
|
/*
|
|
* This gets us back in "F mode" after processing
|
|
* a non-abort signal (e.g. window-change).
|
|
*/
|
|
if (sigs && !ABORT_SIGS())
|
|
newaction = A_F_FOREVER;
|
|
break;
|
|
|
|
case A_F_SCROLL:
|
|
/*
|
|
* Forward N lines
|
|
* (default same as last 'd' or 'u' command).
|
|
*/
|
|
if (number > 0)
|
|
wscroll = number;
|
|
cmd_exec();
|
|
if (show_attn == OPT_ONPLUS)
|
|
set_attnpos(bottompos);
|
|
forward(wscroll, 0, 0);
|
|
break;
|
|
|
|
case A_B_SCROLL:
|
|
/*
|
|
* Forward N lines
|
|
* (default same as last 'd' or 'u' command).
|
|
*/
|
|
if (number > 0)
|
|
wscroll = number;
|
|
cmd_exec();
|
|
backward(wscroll, 0, 0);
|
|
break;
|
|
|
|
case A_FREPAINT:
|
|
/*
|
|
* Flush buffers, then repaint screen.
|
|
* Don't flush the buffers on a pipe!
|
|
*/
|
|
if (ch_getflags() & CH_CANSEEK)
|
|
{
|
|
ch_flush();
|
|
clr_linenum();
|
|
#if HILITE_SEARCH
|
|
clr_hilite();
|
|
#endif
|
|
}
|
|
/* FALLTHRU */
|
|
case A_REPAINT:
|
|
/*
|
|
* Repaint screen.
|
|
*/
|
|
cmd_exec();
|
|
repaint();
|
|
break;
|
|
|
|
case A_GOLINE:
|
|
/*
|
|
* Go to line N, default beginning of file.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
cmd_exec();
|
|
jump_back(number);
|
|
break;
|
|
|
|
case A_PERCENT:
|
|
/*
|
|
* Go to a specified percentage into the file.
|
|
*/
|
|
if (number < 0)
|
|
number = 0;
|
|
if (number > 100)
|
|
number = 100;
|
|
cmd_exec();
|
|
jump_percent(number);
|
|
break;
|
|
|
|
case A_GOEND:
|
|
/*
|
|
* Go to line N, default end of file.
|
|
*/
|
|
cmd_exec();
|
|
if (number <= 0)
|
|
jump_forw();
|
|
else
|
|
jump_back(number);
|
|
break;
|
|
|
|
case A_GOPOS:
|
|
/*
|
|
* Go to a specified byte position in the file.
|
|
*/
|
|
cmd_exec();
|
|
if (number < 0)
|
|
number = 0;
|
|
jump_line_loc((POSITION)number, jump_sline);
|
|
break;
|
|
|
|
case A_STAT:
|
|
/*
|
|
* Print file name, etc.
|
|
*/
|
|
if (ch_getflags() & CH_HELPFILE)
|
|
break;
|
|
cmd_exec();
|
|
parg.p_string = eq_message();
|
|
error("%s", &parg);
|
|
break;
|
|
|
|
case A_VERSION:
|
|
/*
|
|
* Print version number, without the "@(#)".
|
|
*/
|
|
cmd_exec();
|
|
dispversion();
|
|
break;
|
|
|
|
case A_QUIT:
|
|
/*
|
|
* Exit.
|
|
*/
|
|
if (curr_ifile != NULL_IFILE &&
|
|
ch_getflags() & CH_HELPFILE)
|
|
{
|
|
/*
|
|
* Quit while viewing the help file
|
|
* just means return to viewing the
|
|
* previous file.
|
|
*/
|
|
if (edit_prev(1) == 0)
|
|
break;
|
|
}
|
|
if (extra != NULL)
|
|
quit(*extra);
|
|
quit(QUIT_OK);
|
|
break;
|
|
|
|
/*
|
|
* Define abbreviation for a commonly used sequence below.
|
|
*/
|
|
#define DO_SEARCH() if (number <= 0) number = 1; \
|
|
mca_search(); \
|
|
cmd_exec(); \
|
|
multi_search((char *)NULL, number);
|
|
|
|
|
|
case A_F_SEARCH:
|
|
/*
|
|
* Search forward for a pattern.
|
|
* Get the first char of the pattern.
|
|
*/
|
|
search_type = SRCH_FORW;
|
|
if (number <= 0)
|
|
number = 1;
|
|
mca_search();
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_B_SEARCH:
|
|
/*
|
|
* Search backward for a pattern.
|
|
* Get the first char of the pattern.
|
|
*/
|
|
search_type = SRCH_BACK;
|
|
if (number <= 0)
|
|
number = 1;
|
|
mca_search();
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_AGAIN_SEARCH:
|
|
/*
|
|
* Repeat previous search.
|
|
*/
|
|
DO_SEARCH();
|
|
break;
|
|
|
|
case A_T_AGAIN_SEARCH:
|
|
/*
|
|
* Repeat previous search, multiple files.
|
|
*/
|
|
search_type |= SRCH_PAST_EOF;
|
|
DO_SEARCH();
|
|
break;
|
|
|
|
case A_REVERSE_SEARCH:
|
|
/*
|
|
* Repeat previous search, in reverse direction.
|
|
*/
|
|
save_search_type = search_type;
|
|
search_type = SRCH_REVERSE(search_type);
|
|
DO_SEARCH();
|
|
search_type = save_search_type;
|
|
break;
|
|
|
|
case A_T_REVERSE_SEARCH:
|
|
/*
|
|
* Repeat previous search,
|
|
* multiple files in reverse direction.
|
|
*/
|
|
save_search_type = search_type;
|
|
search_type = SRCH_REVERSE(search_type);
|
|
search_type |= SRCH_PAST_EOF;
|
|
DO_SEARCH();
|
|
search_type = save_search_type;
|
|
break;
|
|
|
|
case A_UNDO_SEARCH:
|
|
undo_search();
|
|
break;
|
|
|
|
case A_HELP:
|
|
/*
|
|
* Help.
|
|
*/
|
|
if (ch_getflags() & CH_HELPFILE)
|
|
break;
|
|
cmd_exec();
|
|
(void) edit(FAKE_HELPFILE);
|
|
break;
|
|
|
|
case A_EXAMINE:
|
|
#if EXAMINE
|
|
/*
|
|
* Edit a new file. Get the filename.
|
|
*/
|
|
if (secure)
|
|
{
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
}
|
|
start_mca(A_EXAMINE, "Examine: ", ml_examine, 0);
|
|
c = getcc();
|
|
goto again;
|
|
#else
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
#endif
|
|
|
|
case A_VISUAL:
|
|
/*
|
|
* Invoke an editor on the input file.
|
|
*/
|
|
#if EDITOR
|
|
if (secure)
|
|
{
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
}
|
|
if (ch_getflags() & CH_HELPFILE)
|
|
break;
|
|
if (strcmp(get_filename(curr_ifile), "-") == 0)
|
|
{
|
|
error("Cannot edit standard input", NULL_PARG);
|
|
break;
|
|
}
|
|
if (curr_altfilename != NULL)
|
|
{
|
|
error("Cannot edit file processed with LESSOPEN",
|
|
NULL_PARG);
|
|
break;
|
|
}
|
|
start_mca(A_SHELL, "!", ml_shell, 0);
|
|
/*
|
|
* Expand the editor prototype string
|
|
* and pass it to the system to execute.
|
|
* (Make sure the screen is displayed so the
|
|
* expansion of "+%lm" works.)
|
|
*/
|
|
make_display();
|
|
cmd_exec();
|
|
lsystem(pr_expand(editproto, 0), (char*)NULL);
|
|
break;
|
|
#else
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
#endif
|
|
|
|
case A_NEXT_FILE:
|
|
/*
|
|
* Examine next file.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
if (edit_next(number))
|
|
{
|
|
if (quit_at_eof && hit_eof &&
|
|
!(ch_getflags() & CH_HELPFILE))
|
|
quit(QUIT_OK);
|
|
parg.p_string = (number > 1) ? "(N-th) " : "";
|
|
error("No %snext file", &parg);
|
|
}
|
|
break;
|
|
|
|
case A_PREV_FILE:
|
|
/*
|
|
* Examine previous file.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
if (edit_prev(number))
|
|
{
|
|
parg.p_string = (number > 1) ? "(N-th) " : "";
|
|
error("No %sprevious file", &parg);
|
|
}
|
|
break;
|
|
|
|
case A_INDEX_FILE:
|
|
/*
|
|
* Examine a particular file.
|
|
*/
|
|
if (number <= 0)
|
|
number = 1;
|
|
if (edit_index(number))
|
|
error("No such file", NULL_PARG);
|
|
break;
|
|
|
|
case A_REMOVE_FILE:
|
|
if (ch_getflags() & CH_HELPFILE)
|
|
break;
|
|
old_ifile = curr_ifile;
|
|
new_ifile = getoff_ifile(curr_ifile);
|
|
if (new_ifile == NULL_IFILE)
|
|
{
|
|
bell();
|
|
break;
|
|
}
|
|
if (edit_ifile(new_ifile) != 0)
|
|
{
|
|
reedit_ifile(old_ifile);
|
|
break;
|
|
}
|
|
del_ifile(old_ifile);
|
|
break;
|
|
|
|
case A_OPT_TOGGLE:
|
|
optflag = OPT_TOGGLE;
|
|
optgetname = FALSE;
|
|
mca_opt_toggle();
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_DISP_OPTION:
|
|
/*
|
|
* Report a flag setting.
|
|
*/
|
|
optflag = OPT_NO_TOGGLE;
|
|
optgetname = FALSE;
|
|
mca_opt_toggle();
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_FIRSTCMD:
|
|
/*
|
|
* Set an initial command for new files.
|
|
*/
|
|
start_mca(A_FIRSTCMD, "+", (void*)NULL, 0);
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_SHELL:
|
|
/*
|
|
* Shell escape.
|
|
*/
|
|
#if SHELL_ESCAPE
|
|
if (secure)
|
|
{
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
}
|
|
start_mca(A_SHELL, "!", ml_shell, 0);
|
|
c = getcc();
|
|
goto again;
|
|
#else
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
#endif
|
|
|
|
case A_SETMARK:
|
|
/*
|
|
* Set a mark.
|
|
*/
|
|
if (ch_getflags() & CH_HELPFILE)
|
|
break;
|
|
start_mca(A_SETMARK, "mark: ", (void*)NULL, 0);
|
|
c = getcc();
|
|
if (c == erase_char || c == kill_char ||
|
|
c == '\n' || c == '\r')
|
|
break;
|
|
setmark(c);
|
|
break;
|
|
|
|
case A_GOMARK:
|
|
/*
|
|
* Go to a mark.
|
|
*/
|
|
start_mca(A_GOMARK, "goto mark: ", (void*)NULL, 0);
|
|
c = getcc();
|
|
if (c == erase_char || c == kill_char ||
|
|
c == '\n' || c == '\r')
|
|
break;
|
|
gomark(c);
|
|
break;
|
|
|
|
case A_PIPE:
|
|
#if PIPEC
|
|
if (secure)
|
|
{
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
}
|
|
start_mca(A_PIPE, "|mark: ", (void*)NULL, 0);
|
|
c = getcc();
|
|
if (c == erase_char || c == kill_char)
|
|
break;
|
|
if (c == '\n' || c == '\r')
|
|
c = '.';
|
|
if (badmark(c))
|
|
break;
|
|
pipec = c;
|
|
start_mca(A_PIPE, "!", ml_shell, 0);
|
|
c = getcc();
|
|
goto again;
|
|
#else
|
|
error("Command not available", NULL_PARG);
|
|
break;
|
|
#endif
|
|
|
|
case A_B_BRACKET:
|
|
case A_F_BRACKET:
|
|
start_mca(action, "Brackets: ", (void*)NULL, 0);
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_LSHIFT:
|
|
if (number <= 0)
|
|
number = 8;
|
|
if (number > hshift)
|
|
number = hshift;
|
|
hshift -= number;
|
|
screen_trashed = 1;
|
|
break;
|
|
|
|
case A_RSHIFT:
|
|
if (number <= 0)
|
|
number = 8;
|
|
hshift += number;
|
|
screen_trashed = 1;
|
|
break;
|
|
|
|
case A_PREFIX:
|
|
/*
|
|
* The command is incomplete (more chars are needed).
|
|
* Display the current char, so the user knows
|
|
* what's going on, and get another character.
|
|
*/
|
|
if (mca != A_PREFIX)
|
|
{
|
|
cmd_reset();
|
|
start_mca(A_PREFIX, " ", (void*)NULL,
|
|
CF_QUIT_ON_ERASE);
|
|
(void) cmd_char(c);
|
|
}
|
|
c = getcc();
|
|
goto again;
|
|
|
|
case A_NOACTION:
|
|
break;
|
|
|
|
default:
|
|
bell();
|
|
break;
|
|
}
|
|
}
|
|
}
|