343 lines
13 KiB
C
343 lines
13 KiB
C
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/*-
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* Copyright (c) 1992, 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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* @(#)screen.h 8.127 (Berkeley) 8/8/94
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*/
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/*
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* There are minimum values that vi has to have to display a screen. The
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* row minimum is fixed at 1 line for the text, and 1 line for any error
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* messages. The column calculation is a lot trickier. For example, you
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* have to have enough columns to display the line number, not to mention
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* guaranteeing that tabstop and shiftwidth values are smaller than the
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* current column value. It's a lot simpler to have a fixed value and not
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* worry about it.
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*
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* XXX
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* MINIMUM_SCREEN_COLS is probably wrong.
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*/
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#define MINIMUM_SCREEN_ROWS 2
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#define MINIMUM_SCREEN_COLS 20
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enum adjust { /* Screen adjustment operations. */
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A_DECREASE, A_INCREASE, A_SET };
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enum operation { /* Line operations. */
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LINE_APPEND, LINE_DELETE, LINE_INSERT, LINE_RESET };
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enum position { /* Position operations. */
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P_BOTTOM, P_FILL, P_MIDDLE, P_TOP };
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enum sctype { /* Scroll operations. */
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CNTRL_B, CNTRL_D, CNTRL_E, CNTRL_F, CNTRL_U, CNTRL_Y, Z_CARAT, Z_PLUS };
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/*
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* Structure for holding file references. Each SCR structure contains a
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* linked list of these. The structure contains the name of the file,
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* along with the information that follows the name.
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*
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* !!!
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* The read-only bit follows the file name, not the file itself.
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*
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* XXX
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* The mtime field should be a struct timespec, but time_t is more portable.
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*/
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struct _fref {
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CIRCLEQ_ENTRY(_fref) q; /* Linked list of file references. */
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char *name; /* File name. */
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char *tname; /* Backing temporary file name. */
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recno_t lno; /* 1-N: file cursor line. */
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size_t cno; /* 0-N: file cursor column. */
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#define FR_CURSORSET 0x001 /* If lno/cno values valid. */
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#define FR_DONTDELETE 0x002 /* Don't delete the temporary file. */
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#define FR_FNONBLANK 0x004 /* Move to the first non-<blank>. */
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#define FR_NAMECHANGE 0x008 /* If the name changed. */
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#define FR_NEWFILE 0x010 /* File doesn't really exist yet. */
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#define FR_RDONLY 0x020 /* File is read-only. */
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#define FR_READNAMED 0x040 /* Read renamed the file. */
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#define FR_RECOVER 0x080 /* File is being recovered. */
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#define FR_TMPEXIT 0x100 /* Modified temporary file, no exit. */
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#define FR_TMPFILE 0x200 /* If file has no name. */
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#define FR_UNLOCKED 0x400 /* File couldn't be locked. */
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u_int16_t flags;
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};
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#define TEMPORARY_FILE_STRING "/tmp" /* Default temporary file name. */
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/*
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* SCR --
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* The screen structure. To the extent possible, all screen information
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* is stored in the various private areas. The only information here
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* is used by global routines or is shared by too many screens.
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*/
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struct _scr {
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/* INITIALIZED AT SCREEN CREATE. */
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CIRCLEQ_ENTRY(_scr) q; /* Screens. */
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GS *gp; /* Pointer to global area. */
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SCR *nextdisp; /* Next display screen. */
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EXF *ep; /* Screen's current EXF structure. */
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MSGH msgq; /* Message list. */
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/* FREF list. */
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CIRCLEQ_HEAD(_frefh, _fref) frefq;
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FREF *frp; /* FREF being edited. */
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char **argv; /* NULL terminated file name array. */
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char **cargv; /* Current file name. */
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u_long ccnt; /* Command count. */
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u_long q_ccnt; /* Quit or ZZ command count. */
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/* Screen's: */
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size_t rows; /* 1-N: number of rows. */
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size_t cols; /* 1-N: number of columns. */
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size_t woff; /* 0-N: row offset in screen. */
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size_t t_rows; /* 1-N: cur number of text rows. */
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size_t t_maxrows; /* 1-N: max number of text rows. */
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size_t t_minrows; /* 1-N: min number of text rows. */
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/* Cursor's: */
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recno_t lno; /* 1-N: file line. */
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size_t cno; /* 0-N: file character in line. */
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size_t rcm; /* Vi: 0-N: Most attractive column. */
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int rcm_last; /* Cursor drawn to the last column. */
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#define L_ADDED 0 /* Added lines. */
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#define L_CHANGED 1 /* Changed lines. */
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#define L_DELETED 2 /* Deleted lines. */
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#define L_JOINED 3 /* Joined lines. */
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#define L_MOVED 4 /* Moved lines. */
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#define L_LSHIFT 5 /* Left shift lines. */
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#define L_RSHIFT 6 /* Right shift lines. */
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#define L_YANKED 7 /* Yanked lines. */
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recno_t rptlchange; /* Ex/vi: last L_CHANGED lno. */
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recno_t rptlines[L_YANKED + 1];/* Ex/vi: lines changed by last op. */
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FILE *stdfp; /* Ex output file pointer. */
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char *if_name; /* Ex input file name, for messages. */
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recno_t if_lno; /* Ex input file line, for messages. */
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fd_set rdfd; /* Ex/vi: read fd select mask. */
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TEXTH __tiq; /* Ex/vi: text input queue. */
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TEXTH *tiqp; /* Ex/vi: text input queue reference. */
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SCRIPT *script; /* Vi: script mode information .*/
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recno_t defscroll; /* Vi: ^D, ^U scroll information. */
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struct timeval busy_tod; /* ITIMER_REAL: busy time-of-day. */
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char const *busy_msg; /* ITIMER_REAL: busy message. */
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/* Display character. */
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CHAR_T cname[MAX_CHARACTER_COLUMNS + 1];
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size_t clen; /* Length of display character. */
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#define MAX_MODE_NAME 12
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char *showmode; /* Mode. */
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void *ex_private; /* Ex private area. */
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void *sex_private; /* Ex screen private area. */
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void *vi_private; /* Vi private area. */
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void *svi_private; /* Vi curses screen private area. */
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void *xaw_private; /* Vi XAW screen private area. */
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/* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */
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char *alt_name; /* Ex/vi: alternate file name. */
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/* Ex/vi: search/substitute info. */
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regex_t sre; /* Last search RE. */
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regex_t subre; /* Last substitute RE. */
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enum direction searchdir; /* File search direction. */
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char *repl; /* Substitute replacement. */
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size_t repl_len; /* Substitute replacement length.*/
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size_t *newl; /* Newline offset array. */
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size_t newl_len; /* Newline array size. */
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size_t newl_cnt; /* Newlines in replacement. */
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u_char c_suffix; /* Edcompatible 'c' suffix value. */
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u_char g_suffix; /* Edcompatible 'g' suffix value. */
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u_int saved_vi_mode; /* Saved vi display type. */
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OPTION opts[O_OPTIONCOUNT]; /* Options. */
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/*
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* SCREEN SUPPORT ROUTINES.
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*
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* A SCR * MUST be the first argument to these routines.
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*/
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/* Ring the screen bell. */
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void (*s_bell) __P((SCR *));
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/* Background the screen. */
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int (*s_bg) __P((SCR *));
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/* Put up a busy message. */
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int (*s_busy) __P((SCR *, char const *));
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/* Change a screen line. */
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int (*s_change) __P((SCR *, EXF *, recno_t, enum operation));
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/* Clear the screen. */
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int (*s_clear) __P((SCR *));
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/* Return column close to specified. */
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size_t (*s_colpos) __P((SCR *, EXF *, recno_t, size_t));
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/* Return the logical cursor column. */
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int (*s_column) __P((SCR *, EXF *, size_t *));
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enum confirm /* Confirm an action with the user. */
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(*s_confirm) __P((SCR *, EXF *, MARK *, MARK *));
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/* Change the relative screen size. */
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int (*s_crel) __P((SCR *, long));
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/* Edit a file. */
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int (*s_edit) __P((SCR *, EXF *));
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/* End a screen. */
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int (*s_end) __P((SCR *));
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/* Run a single ex command. */
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int (*s_ex_cmd) __P((SCR *, EXF *, EXCMDARG *, MARK *));
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/* Run user's ex commands. */
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int (*s_ex_run) __P((SCR *, EXF *, MARK *));
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/* Screen's ex write function. */
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int (*s_ex_write) __P((void *, const char *, int));
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/* Foreground the screen. */
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int (*s_fg) __P((SCR *, CHAR_T *));
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/* Fill the screen's map. */
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int (*s_fill) __P((SCR *, EXF *, recno_t, enum position));
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enum input /* Get a line from the user. */
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(*s_get) __P((SCR *, EXF *, TEXTH *, ARG_CHAR_T, u_int));
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enum input /* Get a key from the user. */
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(*s_key_read) __P((SCR *, int *, struct timeval *));
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/* Map a function key. */
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int (*s_fmap) __P((SCR *,
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enum seqtype, CHAR_T *, size_t, CHAR_T *, size_t));
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/* Tell the screen an option changed. */
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int (*s_optchange) __P((SCR *, int));
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/* Return column at screen position. */
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int (*s_position) __P((SCR *, EXF *,
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MARK *, u_long, enum position));
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/* Change the absolute screen size. */
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int (*s_rabs) __P((SCR *, long, enum adjust));
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/* Return column close to selection. */
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size_t (*s_rcm) __P((SCR *, EXF *, recno_t));
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/* Refresh the screen. */
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int (*s_refresh) __P((SCR *, EXF *));
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/* Move down the screen. */
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int (*s_scroll) __P((SCR *, EXF *, MARK *, recno_t, enum sctype));
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/* Split the screen. */
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int (*s_split) __P((SCR *, ARGS *[], int));
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/* Suspend the screen. */
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int (*s_suspend) __P((SCR *));
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/* Set the window size. */
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int (*s_window) __P((SCR *, int));
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/* Editor screens. */
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#define S_EX 0x0000001 /* Ex screen. */
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#define S_VI_CURSES 0x0000002 /* Vi: curses screen. */
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#define S_VI_XAW 0x0000004 /* Vi: Athena widgets screen. */
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#define IN_EX_MODE(sp) /* If in ex mode. */ \
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(F_ISSET(sp, S_EX))
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#define IN_VI_MODE(sp) /* If in vi mode. */ \
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(F_ISSET(sp, S_VI_CURSES | S_VI_XAW))
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#define S_SCREENS /* Screens. */ \
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(S_EX | S_VI_CURSES | S_VI_XAW)
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/* Major screen/file changes. */
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#define S_EXIT 0x0000008 /* Exiting (not forced). */
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#define S_EXIT_FORCE 0x0000010 /* Exiting (forced). */
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#define S_FSWITCH 0x0000020 /* Switch files. */
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#define S_SSWITCH 0x0000040 /* Switch screens. */
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#define S_MAJOR_CHANGE /* Screen or file changes. */ \
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(S_EXIT | S_EXIT_FORCE | S_FSWITCH | S_SSWITCH)
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#define S_ARGNOFREE 0x0000080 /* Argument list wasn't allocated. */
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#define S_ARGRECOVER 0x0000100 /* Argument list is recovery files. */
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#define S_BELLSCHED 0x0000200 /* Bell scheduled. */
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#define S_CONTINUE 0x0000400 /* Need to ask the user to continue. */
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#define S_EXSILENT 0x0000800 /* Ex batch script. */
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#define S_GLOBAL 0x0001000 /* Doing a global command. */
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#define S_INPUT 0x0002000 /* Doing text input. */
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#define S_INTERRUPTED 0x0004000 /* If have been interrupted. */
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#define S_INTERRUPTIBLE 0x0008000 /* If can be interrupted. */
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#define S_IVIDEO 0x0010000 /* Display in inverse video. */
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#define S_REDRAW 0x0020000 /* Redraw the screen. */
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#define S_REFORMAT 0x0040000 /* Reformat the screen. */
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#define S_REFRESH 0x0080000 /* Refresh the screen. */
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#define S_RENUMBER 0x0100000 /* Renumber the screen. */
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#define S_RESIZE 0x0200000 /* Resize the screen. */
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#define S_SCRIPT 0x0400000 /* Window is a shell script. */
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#define S_SRE_SET 0x0800000 /* The search RE has been set. */
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#define S_SUBRE_SET 0x1000000 /* The substitute RE has been set. */
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#define S_UPDATE_MODE 0x2000000 /* Don't repaint modeline. */
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#define S_VLITONLY 0x4000000 /* ^V literal next only. */
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u_int32_t flags;
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};
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/*
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* Signals/timers have no structure, so it's all here.
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*
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* Block all signals that are being handled. Used to keep the underlying DB
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* system calls from being interrupted and not restarted, as it could cause
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* consistency problems. Also used when vi forks child processes, to avoid
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* a signal arriving after the fork and before the exec, causing both parent
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* and child to attempt recovery processing.
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*/
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#define SIGBLOCK(gp) \
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(void)sigprocmask(SIG_BLOCK, &(gp)->blockset, NULL);
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#define SIGUNBLOCK(gp) \
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(void)sigprocmask(SIG_UNBLOCK, &(gp)->blockset, NULL);
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void busy_off __P((SCR *));
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int busy_on __P((SCR *, char const *));
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void sig_end __P((void));
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int sig_init __P((SCR *));
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||
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||
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/* Generic routines to start/stop a screen. */
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||
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int screen_end __P((SCR *));
|
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int screen_init __P((SCR *, SCR **, u_int));
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||
|
|
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/* Public interfaces to the underlying screens. */
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||
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int ex_screen_copy __P((SCR *, SCR *));
|
||
|
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int ex_screen_end __P((SCR *));
|
||
|
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int ex_screen_init __P((SCR *));
|
||
|
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int sex_screen_copy __P((SCR *, SCR *));
|
||
|
|
int sex_screen_end __P((SCR *));
|
||
|
|
int sex_screen_init __P((SCR *));
|
||
|
|
int svi_screen_copy __P((SCR *, SCR *));
|
||
|
|
int svi_screen_end __P((SCR *));
|
||
|
|
int svi_screen_init __P((SCR *));
|
||
|
|
int v_screen_copy __P((SCR *, SCR *));
|
||
|
|
int v_screen_end __P((SCR *));
|
||
|
|
int v_screen_init __P((SCR *));
|
||
|
|
int xaw_screen_copy __P((SCR *, SCR *));
|
||
|
|
int xaw_screen_end __P((SCR *));
|
||
|
|
int xaw_screen_init __P((SCR *));
|