206 lines
7.9 KiB
C
206 lines
7.9 KiB
C
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/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)term.h 8.48 (Berkeley) 7/25/94
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*/
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/*
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* Fundamental character types.
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*
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* CHAR_T An integral type that can hold any character.
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* ARG_CHAR_T The type of a CHAR_T when passed as an argument using
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* traditional promotion rules. It should also be able
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* to be compared against any CHAR_T for equality without
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* problems.
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* MAX_CHAR_T The maximum value of any character.
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*
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* If no integral type can hold a character, don't even try the port.
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*/
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typedef u_char CHAR_T;
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typedef u_int ARG_CHAR_T;
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#define MAX_CHAR_T 0xff
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/* The maximum number of columns any character can take up on a screen. */
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#define MAX_CHARACTER_COLUMNS 4
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/* Structure to return a character and associated information. */
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struct _ch {
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CHAR_T ch; /* Character. */
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#define K_NOTUSED 0
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#define K_CARAT 1
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#define K_CNTRLD 2
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#define K_CNTRLR 3
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#define K_CNTRLT 4
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#define K_CNTRLZ 5
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#define K_COLON 6
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#define K_CR 7
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#define K_ESCAPE 8
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#define K_FORMFEED 9
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#define K_HEXCHAR 10
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#define K_NL 11
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#define K_RIGHTBRACE 12
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#define K_RIGHTPAREN 13
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#define K_TAB 14
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#define K_VERASE 15
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#define K_VKILL 16
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#define K_VLNEXT 17
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#define K_VWERASE 18
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#define K_ZERO 19
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u_int8_t value; /* Special character flag values. */
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#define CH_ABBREVIATED 0x01 /* Character from an abbreviation. */
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#define CH_MAPPED 0x02 /* Character from a map. */
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#define CH_NOMAP 0x04 /* Do not map the character. */
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#define CH_QUOTED 0x08 /* Character is already quoted. */
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u_int8_t flags;
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};
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typedef struct _keylist {
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u_int8_t value; /* Special value. */
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CHAR_T ch; /* Key. */
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} KEYLIST;
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extern KEYLIST keylist[];
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/* Structure for the key input buffer. */
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struct _ibuf {
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CHAR_T *ch; /* Array of characters. */
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u_int8_t *chf; /* Array of character flags (CH_*). */
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size_t cnt; /* Count of remaining characters. */
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size_t nelem; /* Numer of array elements. */
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size_t next; /* Offset of next array entry. */
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};
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/* Return if more keys in queue. */
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#define KEYS_WAITING(sp) ((sp)->gp->tty->cnt)
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#define MAPPED_KEYS_WAITING(sp) \
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(KEYS_WAITING(sp) && sp->gp->tty->chf[sp->gp->tty->next] & CH_MAPPED)
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/*
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* Routines that return a key as a side-effect return:
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*
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* INP_OK Returning a character; must be 0.
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* INP_EOF EOF.
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* INP_ERR Error.
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* INP_INTR Interrupted.
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*
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* The vi structure depends on the key routines being able to return INP_EOF
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* multiple times without failing -- eventually enough things will end due to
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* INP_EOF that vi will reach the command level for the screen, at which point
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* the exit flags will be set and vi will exit.
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*/
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enum input { INP_OK=0, INP_EOF, INP_ERR, INP_INTR };
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/*
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* Routines that return a confirmation return:
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*
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* CONF_NO User answered no.
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* CONF_QUIT User answered quit, eof or an error.
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* CONF_YES User answered yes.
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*/
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enum confirm { CONF_NO, CONF_QUIT, CONF_YES };
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/*
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* Ex/vi commands are generally separated by whitespace characters. We
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* can't use the standard isspace(3) macro because it returns true for
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* characters like ^K in the ASCII character set. The 4.4BSD isblank(3)
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* macro does exactly what we want, but it's not portable yet.
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*
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* XXX
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* Note side effect, ch is evaluated multiple times.
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*/
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#ifndef isblank
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#define isblank(ch) ((ch) == ' ' || (ch) == '\t')
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#endif
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/* The "standard" tab width, for displaying things to users. */
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#define STANDARD_TAB 6
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/* Various special characters, messages. */
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#define CH_BSEARCH '?' /* Backward search prompt. */
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#define CH_CURSOR ' ' /* Cursor character. */
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#define CH_ENDMARK '$' /* End of a range. */
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#define CH_EXPROMPT ':' /* Ex prompt. */
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#define CH_FSEARCH '/' /* Forward search prompt. */
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#define CH_HEX '\030' /* Leading hex character. */
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#define CH_LITERAL '\026' /* ASCII ^V. */
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#define CH_NO 'n' /* No. */
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#define CH_NOT_DIGIT 'a' /* A non-isdigit() character. */
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#define CH_QUIT 'q' /* Quit. */
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#define CH_YES 'y' /* Yes. */
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#define STR_CONFIRM "confirm? [ynq]"
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#define STR_CMSG "Enter return to continue: "
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#define STR_QMSG "Enter return to continue [q to quit]: "
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/* Flags describing how input is handled. */
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#define TXT_AICHARS 0x00000001 /* Leading autoindent chars. */
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#define TXT_ALTWERASE 0x00000002 /* Option: altwerase. */
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#define TXT_APPENDEOL 0x00000004 /* Appending after EOL. */
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#define TXT_AUTOINDENT 0x00000008 /* Autoindent set this line. */
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#define TXT_BACKSLASH 0x00000010 /* Backslashes escape characters. */
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#define TXT_BEAUTIFY 0x00000020 /* Only printable characters. */
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#define TXT_BS 0x00000040 /* Backspace returns the buffer. */
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#define TXT_CNTRLD 0x00000080 /* Control-D is a special command. */
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#define TXT_CNTRLT 0x00000100 /* Control-T is an indent special. */
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#define TXT_CR 0x00000200 /* CR returns the buffer. */
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#define TXT_DOTTERM 0x00000400 /* Leading '.' terminates the input. */
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#define TXT_EMARK 0x00000800 /* End of replacement mark. */
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#define TXT_ESCAPE 0x00001000 /* Escape returns the buffer. */
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#define TXT_EXSUSPEND 0x00002000 /* ^Z should suspend the session. */
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#define TXT_INFOLINE 0x00004000 /* Editing the info line. */
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#define TXT_MAPCOMMAND 0x00008000 /* Apply the command map. */
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#define TXT_MAPINPUT 0x00010000 /* Apply the input map. */
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#define TXT_MAPNODIGIT 0x00020000 /* Return to a digit. */
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#define TXT_NLECHO 0x00040000 /* Echo the newline. */
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#define TXT_OVERWRITE 0x00080000 /* Overwrite characters. */
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#define TXT_PROMPT 0x00100000 /* Display a prompt. */
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#define TXT_RECORD 0x00200000 /* Record for replay. */
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#define TXT_REPLACE 0x00400000 /* Replace; don't delete overwrite. */
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#define TXT_REPLAY 0x00800000 /* Replay the last input. */
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#define TXT_RESOLVE 0x01000000 /* Resolve the text into the file. */
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#define TXT_SHOWMATCH 0x02000000 /* Option: showmatch. */
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#define TXT_TTYWERASE 0x04000000 /* Option: ttywerase. */
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#define TXT_WRAPMARGIN 0x08000000 /* Option: wrapmargin. */
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/* Support keyboard routines. */
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size_t __key_len __P((SCR *, ARG_CHAR_T));
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CHAR_T *__key_name __P((SCR *, ARG_CHAR_T));
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int __key_val __P((SCR *, ARG_CHAR_T));
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void key_init __P((SCR *));
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void term_flush __P((SCR *, char *, u_int));
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enum input term_key __P((SCR *, CH *, u_int));
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enum input term_user_key __P((SCR *, CH *));
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int term_init __P((SCR *));
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int term_push __P((SCR *, CHAR_T *, size_t, u_int));
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