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Diffstat (limited to 'contrib/nvi/common/key.h')
| -rw-r--r-- | contrib/nvi/common/key.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/contrib/nvi/common/key.h b/contrib/nvi/common/key.h new file mode 100644 index 000000000000..76fb64f8e1ec --- /dev/null +++ b/contrib/nvi/common/key.h @@ -0,0 +1,222 @@ +/*- + * Copyright (c) 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * Copyright (c) 1991, 1993, 1994, 1995, 1996 + * Keith Bostic. All rights reserved. + * + * See the LICENSE file for redistribution information. + * + * @(#)key.h 10.18 (Berkeley) 6/30/96 + */ + +/* + * Fundamental character types. + * + * CHAR_T An integral type that can hold any character. + * ARG_CHAR_T The type of a CHAR_T when passed as an argument using + * traditional promotion rules. It should also be able + * to be compared against any CHAR_T for equality without + * problems. + * MAX_CHAR_T The maximum value of any character. + * + * If no integral type can hold a character, don't even try the port. + */ +typedef u_char CHAR_T; +typedef u_int ARG_CHAR_T; +#define MAX_CHAR_T 0xff + +/* The maximum number of columns any character can take up on a screen. */ +#define MAX_CHARACTER_COLUMNS 4 + +/* + * Event types. + * + * The program structure depends on the event loop being able to return + * E_EOF/E_ERR multiple times -- eventually enough things will end due + * to the events that vi will reach the command level for the screen, at + * which point the exit flags will be set and vi will exit. + */ +typedef enum { + E_NOTUSED = 0, /* Not set. */ + E_CHARACTER, /* Input character: e_c set. */ + E_EOF, /* End of input (NOT ^D). */ + E_ERR, /* Input error. */ + E_INTERRUPT, /* Interrupt. */ + E_QUIT, /* Quit. */ + E_REPAINT, /* Repaint: e_flno, e_tlno set. */ + E_SIGHUP, /* SIGHUP. */ + E_SIGTERM, /* SIGTERM. */ + E_STRING, /* Input string: e_csp, e_len set. */ + E_TIMEOUT, /* Timeout. */ + E_WRESIZE, /* Window resize. */ + E_WRITE /* Write. */ +} e_event_t; + +/* + * Character values. + */ +typedef enum { + K_NOTUSED = 0, /* Not set. */ + K_BACKSLASH, /* \ */ + K_CARAT, /* ^ */ + K_CNTRLD, /* ^D */ + K_CNTRLR, /* ^R */ + K_CNTRLT, /* ^T */ + K_CNTRLZ, /* ^Z */ + K_COLON, /* : */ + K_CR, /* \r */ + K_ESCAPE, /* ^[ */ + K_FORMFEED, /* \f */ + K_HEXCHAR, /* ^X */ + K_NL, /* \n */ + K_RIGHTBRACE, /* } */ + K_RIGHTPAREN, /* ) */ + K_TAB, /* \t */ + K_VERASE, /* set from tty: default ^H */ + K_VKILL, /* set from tty: default ^U */ + K_VLNEXT, /* set from tty: default ^V */ + K_VWERASE, /* set from tty: default ^W */ + K_ZERO /* 0 */ +} e_key_t; + +struct _event { + TAILQ_ENTRY(_event) q; /* Linked list of events. */ + e_event_t e_event; /* Event type. */ + union { + struct { /* Input character. */ + CHAR_T c; /* Character. */ + e_key_t value; /* Key type. */ + +#define CH_ABBREVIATED 0x01 /* Character is from an abbreviation. */ +#define CH_MAPPED 0x02 /* Character is from a map. */ +#define CH_NOMAP 0x04 /* Do not map the character. */ +#define CH_QUOTED 0x08 /* Character is already quoted. */ + u_int8_t flags; + } _e_ch; +#define e_ch _u_event._e_ch /* !!! The structure, not the char. */ +#define e_c _u_event._e_ch.c +#define e_value _u_event._e_ch.value +#define e_flags _u_event._e_ch.flags + + struct { /* Screen position, size. */ + size_t lno1; /* Line number. */ + size_t cno1; /* Column number. */ + size_t lno2; /* Line number. */ + size_t cno2; /* Column number. */ + } _e_mark; +#define e_lno _u_event._e_mark.lno1 /* Single location. */ +#define e_cno _u_event._e_mark.cno1 +#define e_flno _u_event._e_mark.lno1 /* Text region. */ +#define e_fcno _u_event._e_mark.cno1 +#define e_tlno _u_event._e_mark.lno2 +#define e_tcno _u_event._e_mark.cno2 + + struct { /* Input string. */ + CHAR_T *asp; /* Allocated string. */ + CHAR_T *csp; /* String. */ + size_t len; /* String length. */ + } _e_str; +#define e_asp _u_event._e_str.asp +#define e_csp _u_event._e_str.csp +#define e_len _u_event._e_str.len + } _u_event; +}; + +typedef struct _keylist { + e_key_t value; /* Special value. */ + CHAR_T ch; /* Key. */ +} KEYLIST; +extern KEYLIST keylist[]; + + /* Return if more keys in queue. */ +#define KEYS_WAITING(sp) ((sp)->gp->i_cnt != 0) +#define MAPPED_KEYS_WAITING(sp) \ + (KEYS_WAITING(sp) && \ + F_ISSET(&sp->gp->i_event[sp->gp->i_next].e_ch, CH_MAPPED)) + +/* + * Ex/vi commands are generally separated by whitespace characters. We + * can't use the standard isspace(3) macro because it returns true for + * characters like ^K in the ASCII character set. The 4.4BSD isblank(3) + * macro does exactly what we want, but it's not portable yet. + * + * XXX + * Note side effect, ch is evaluated multiple times. + */ +#ifndef isblank +#define isblank(ch) ((ch) == ' ' || (ch) == '\t') +#endif + +/* The "standard" tab width, for displaying things to users. */ +#define STANDARD_TAB 6 + +/* Various special characters, messages. */ +#define CH_BSEARCH '?' /* Backward search prompt. */ +#define CH_CURSOR ' ' /* Cursor character. */ +#define CH_ENDMARK '$' /* End of a range. */ +#define CH_EXPROMPT ':' /* Ex prompt. */ +#define CH_FSEARCH '/' /* Forward search prompt. */ +#define CH_HEX '\030' /* Leading hex character. */ +#define CH_LITERAL '\026' /* ASCII ^V. */ +#define CH_NO 'n' /* No. */ +#define CH_NOT_DIGIT 'a' /* A non-isdigit() character. */ +#define CH_QUIT 'q' /* Quit. */ +#define CH_YES 'y' /* Yes. */ + +/* + * Checking for interrupts means that we look at the bit that gets set if the + * screen code supports asynchronous events, and call back into the event code + * so that non-asynchronous screens get a chance to post the interrupt. + * + * INTERRUPT_CHECK is the number of lines "operated" on before checking for + * interrupts. + */ +#define INTERRUPT_CHECK 100 +#define INTERRUPTED(sp) \ + (F_ISSET((sp)->gp, G_INTERRUPTED) || \ + (!v_event_get(sp, NULL, 0, EC_INTERRUPT) && \ + F_ISSET((sp)->gp, G_INTERRUPTED))) +#define CLR_INTERRUPT(sp) \ + F_CLR((sp)->gp, G_INTERRUPTED) + +/* Flags describing types of characters being requested. */ +#define EC_INTERRUPT 0x001 /* Checking for interrupts. */ +#define EC_MAPCOMMAND 0x002 /* Apply the command map. */ +#define EC_MAPINPUT 0x004 /* Apply the input map. */ +#define EC_MAPNODIGIT 0x008 /* Return to a digit. */ +#define EC_QUOTED 0x010 /* Try to quote next character */ +#define EC_RAW 0x020 /* Any next character. XXX: not used. */ +#define EC_TIMEOUT 0x040 /* Timeout to next character. */ + +/* Flags describing text input special cases. */ +#define TXT_ADDNEWLINE 0x00000001 /* Replay starts on a new line. */ +#define TXT_AICHARS 0x00000002 /* Leading autoindent chars. */ +#define TXT_ALTWERASE 0x00000004 /* Option: altwerase. */ +#define TXT_APPENDEOL 0x00000008 /* Appending after EOL. */ +#define TXT_AUTOINDENT 0x00000010 /* Autoindent set this line. */ +#define TXT_BACKSLASH 0x00000020 /* Backslashes escape characters. */ +#define TXT_BEAUTIFY 0x00000040 /* Only printable characters. */ +#define TXT_BS 0x00000080 /* Backspace returns the buffer. */ +#define TXT_CEDIT 0x00000100 /* Can return TERM_CEDIT. */ +#define TXT_CNTRLD 0x00000200 /* Control-D is a command. */ +#define TXT_CNTRLT 0x00000400 /* Control-T is an indent special. */ +#define TXT_CR 0x00000800 /* CR returns the buffer. */ +#define TXT_DOTTERM 0x00001000 /* Leading '.' terminates the input. */ +#define TXT_EMARK 0x00002000 /* End of replacement mark. */ +#define TXT_EOFCHAR 0x00004000 /* ICANON set, return EOF character. */ +#define TXT_ESCAPE 0x00008000 /* Escape returns the buffer. */ +#define TXT_FILEC 0x00010000 /* Option: filec. */ +#define TXT_INFOLINE 0x00020000 /* Editing the info line. */ +#define TXT_MAPINPUT 0x00040000 /* Apply the input map. */ +#define TXT_NLECHO 0x00080000 /* Echo the newline. */ +#define TXT_NUMBER 0x00100000 /* Number the line. */ +#define TXT_OVERWRITE 0x00200000 /* Overwrite characters. */ +#define TXT_PROMPT 0x00400000 /* Display a prompt. */ +#define TXT_RECORD 0x00800000 /* Record for replay. */ +#define TXT_REPLACE 0x01000000 /* Replace; don't delete overwrite. */ +#define TXT_REPLAY 0x02000000 /* Replay the last input. */ +#define TXT_RESOLVE 0x04000000 /* Resolve the text into the file. */ +#define TXT_SEARCHINCR 0x08000000 /* Incremental search. */ +#define TXT_SHOWMATCH 0x10000000 /* Option: showmatch. */ +#define TXT_TTYWERASE 0x20000000 /* Option: ttywerase. */ +#define TXT_WRAPMARGIN 0x40000000 /* Option: wrapmargin. */ |