/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
/* Definition of a vi "word". */
#define inword(ch) ((ch) == '_' || (ISGRAPH(ch) && !ISPUNCT(ch)))
typedef struct _vikeys VIKEYS;
/* Structure passed around to functions implementing vi commands. */
typedef struct _vicmd {
CHAR_T key; /* Command key. */
CHAR_T buffer; /* Buffer. */
CHAR_T character; /* Character. */
u_long count; /* Count. */
u_long count2; /* Second count (only used by z). */
EVENT ev; /* Associated event. */
#define ISCMD(p, key) ((p) == &vikeys[key])
VIKEYS const *kp; /* Command/Motion VIKEYS entry. */
#define ISMOTION(vp) (vp->rkp != NULL && F_ISSET(vp->rkp, V_MOTION))
VIKEYS const *rkp; /* Related C/M VIKEYS entry. */
/*
* Historic vi allowed "dl" when the cursor was on the last column,
* deleting the last character, and similarly allowed "dw" when
* the cursor was on the last column of the file. It didn't allow
* "dh" when the cursor was on column 1, although these cases are
* not strictly analogous. The point is that some movements would
* succeed if they were associated with a motion command, and fail
* otherwise. This is part of the off-by-1 schizophrenia that
* plagued vi. Other examples are that "dfb" deleted everything
* up to and including the next 'b' character, while "d/b" deleted
* everything up to the next 'b' character. While this implementation
* regularizes the interface to the extent possible, there are many
* special cases that can't be fixed. The special cases are handled
* by setting flags per command so that the underlying command and
* motion routines know what's really going on.
*
* The VM_* flags are set in the vikeys array and by the underlying
* functions (motion component or command) as well. For this reason,
* the flags in the VICMD and VIKEYS structures live in the same name
* space.
*/
#define VM_CMDFAILED 0x00000001 /* Command failed. */
#define VM_CUTREQ 0x00000002 /* Always cut into numeric buffers. */
#define VM_LDOUBLE 0x00000004 /* Doubled command for line mode. */
#define VM_LMODE 0x00000008 /* Motion is line oriented. */
#define VM_COMMASK 0x0000000f /* Mask for VM flags. */
/*
* The VM_RCM_* flags are single usage, i.e. if you set one, you have
* to clear the others.
*/
#define VM_RCM 0x00000010 /* Use relative cursor movment (RCM). */
#define VM_RCM_SET 0x00000020 /* RCM: set to current position. */
#define VM_RCM_SETFNB 0x00000040 /* RCM: set to first non-blank (FNB). */
#define VM_RCM_SETLAST 0x00000080 /* RCM: set to last character. */
#define VM_RCM_SETNNB 0x00000100 /* RCM: set to next non-blank. */
#define VM_RCM_MASK 0x000001f0 /* Mask for RCM flags. */
/* Flags for the underlying function. */
#define VC_BUFFER 0x00000200 /* The buffer was set. */
#define VC_C1RESET 0x00000400 /* Reset C1SET flag for dot commands. */
#define VC_C1SET 0x00000800 /* Count 1 was set. */
#define VC_C2SET 0x00001000 /* Count 2 was set. */
#define VC_ISDOT 0x00002000 /* Command was the dot command. */
u_int32_t flags;
/*
* There are four cursor locations that we worry about: the initial
* cursor position, the start of the range, the end of the range,
* and the final cursor position. The initial cursor position and
* the start of the range are both m_start, and are always the same.
* All locations are initialized to the starting cursor position by
* the main vi routines, and the underlying functions depend on this.
*
* Commands that can be motion components set the end of the range
* cursor position, m_stop. All commands must set the ending cursor
* position, m_final. The reason that m_stop isn't the same as m_final
* is that there are situations where the final position of the cursor
* is outside of the cut/delete range (e.g. 'd[[' from the first column
* of a line). The final cursor position often varies based on the
* direction of the movement, as well as the command. The only special
* case that the delete code handles is that it will make adjustments
* if the final cursor position is deleted.
*
* The reason for all of this is that the historic vi semantics were
* defined command-by-command. Every function has to roll its own
* starting and stopping positions, and adjust them if it's being used
* as a motion component. The general rules are as follows:
*
* 1: If not a motion component, the final cursor is at the end
* of the range.
* 2: If moving backward in the file, delete and yank move the
* final cursor to the end of the range.
* 3: If moving forward in the file, delete and yank leave the
* final cursor at the start of the range.
*
* Usually, if moving backward in the file and it's a motion component,
* the starting cursor is decremented by a single character (or, in a
* few cases, to the end of the previous line) so that the starting
* cursor character isn't cut or deleted. No cursor adjustment is
* needed for moving forward, because the cut/delete routines handle
* m_stop inclusively, i.e. the last character in the range is cut or
* deleted. This makes cutting to the EOF/EOL reasonable.
*
* The 'c', '<', '>', and '!' commands are special cases. We ignore
* the final cursor position for all of them: for 'c', the text input
* routines set the cursor to the last character inserted; for '<',
* '>' and '!', the underlying ex commands that do the operation will
* set the cursor for us, usually to something related to the first
* <nonblank>.
*/
MARK m_start; /* mark: initial cursor, range start. */
MARK m_stop; /* mark: range end. */
MARK m_final; /* mark: final cursor position. */
} VICMD;
/* Vi command table structure. */
struct _vikeys { /* Underlying function. */
int (*func)(SCR *, VICMD *);
#define V_ABS 0x00004000 /* Absolute movement, set '' mark. */
#define V_ABS_C 0x00008000 /* V_ABS: if the line/column changed. */
#define V_ABS_L 0x00010000 /* V_ABS: if the line changed. */
#define V_CHAR 0x00020000 /* Character (required, trailing). */
#define V_CNT 0x00040000 /* Count (optional, leading). */
#define V_DOT 0x00080000 /* On success, sets dot command. */
#define V_KEYW 0x00100000 /* Cursor referenced word. */
#define V_MOTION 0x00200000 /* Motion (required, trailing). */
#define V_MOVE 0x00400000 /* Command defines movement. */
#define V_OBUF 0x00800000 /* Buffer (optional, leading). */
#define V_RBUF 0x01000000 /* Buffer (required, trailing). */
#define V_SECURE 0x02000000 /* Permission denied if O_SECURE set. */
u_int32_t flags;
char *usage; /* Usage line. */
char *help; /* Help line. */
};
#define MAXVIKEY 126 /* List of vi commands. */
extern VIKEYS const vikeys[MAXVIKEY + 1];
extern VIKEYS const tmotion; /* XXX Hacked ~ command. */
/* Character stream structure, prototypes. */
typedef struct _vcs {
recno_t cs_lno; /* Line. */
size_t cs_cno; /* Column. */
CHAR_T *cs_bp; /* Buffer. */
size_t cs_len; /* Length. */
CHAR_T cs_ch; /* Character. */
#define CS_EMP 1 /* Empty line. */
#define CS_EOF 2 /* End-of-file. */
#define CS_EOL 3 /* End-of-line. */
#define CS_SOF 4 /* Start-of-file. */
int cs_flags; /* Return flags. */
} VCS;
int cs_bblank(SCR *, VCS *);
int cs_fblank(SCR *, VCS *);
int cs_fspace(SCR *, VCS *);
int cs_init(SCR *, VCS *);
int cs_next(SCR *, VCS *);
int cs_prev(SCR *, VCS *);
/*
* We use a single "window" for each set of vi screens. The model would be
* simpler with two windows (one for the text, and one for the modeline)
* because scrolling the text window down would work correctly then, not
* affecting the mode line. As it is we have to play games to make it look
* right. The reason for this choice is that it would be difficult for
* curses to optimize the movement, i.e. detect that the downward scroll
* isn't going to change the modeline, set the scrolling region on the
* terminal and only scroll the first part of the text window.
*
* Structure for mapping lines to the screen. An SMAP is an array, with one
* structure element per screen line, which holds information describing the
* physical line which is displayed in the screen line. The first two fields
* (lno and off) are all that are necessary to describe a line. The rest of
* the information is useful to keep information from being re-calculated.
*
* The SMAP always has an entry for each line of the physical screen, plus a
* slot for the colon command line, so there is room to add any screen into
* another one at screen exit.
*
* Lno is the line number. If doing the historic vi long line folding, soff
* is the screen offset into the line. For example, the pair 2:1 would be
* the first screen of line 2, and 2:2 would be the second. In the case of
* long lines, the screen map will tend to be staggered, e.g., 1:1, 1:2, 1:3,
* 2:1, 3:1, etc. If doing left-right scrolling, the coff field is the screen
* column offset into the lines, and can take on any value, as it's adjusted
* by the user set value O_SIDESCROLL.
*/
typedef struct _smap {
recno_t lno; /* 1-N: Physical file line number. */
size_t coff; /* 0-N: Column offset in the line. */
size_t soff; /* 1-N: Screen offset in the line. */
/* vs_line() cache information. */
size_t c_sboff; /* 0-N: offset of first character on screen. */
size_t c_eboff; /* 0-N: offset of last character on screen. */
u_int8_t c_scoff; /* 0-N: offset into the first character. */
/* 255: no character of line visible. */
u_int8_t c_eclen; /* 1-N: columns from the last character. */
u_int8_t c_ecsize; /* 1-N: size of the last character. */
} SMAP;
/* Macros to flush/test cached information. */
#define SMAP_CACHE(smp) ((smp)->c_ecsize != 0)
#define SMAP_FLUSH(smp) ((smp)->c_ecsize = 0)
/* Character search information. */
typedef enum { CNOTSET, FSEARCH, fSEARCH, TSEARCH, tSEARCH } cdir_t;
typedef enum { AB_NOTSET, AB_NOTWORD, AB_INWORD } abb_t;
typedef enum { Q_NOTSET, Q_VNEXT, Q_VTHIS } quote_t;
/* Vi private, per-screen memory. */
typedef struct _vi_private {
VICMD cmd; /* Current command, motion. */
VICMD motion;
/*
* !!!
* The saved command structure can be modified by the underlying
* vi functions, see v_Put() and v_put().
*/
VICMD sdot; /* Saved dot, motion command. */
VICMD sdotmotion;
CHAR_T *keyw; /* Keyword buffer. */
size_t klen; /* Keyword length. */
size_t keywlen; /* Keyword buffer length. */
CHAR_T rlast; /* Last 'r' replacement character. */
e_key_t rvalue; /* Value of last replacement character. */
EVENT *rep; /* Input replay buffer. */
size_t rep_len; /* Input replay buffer length. */
size_t rep_cnt; /* Input replay buffer characters. */
mtype_t mtype; /* Last displayed message type. */
size_t linecount; /* 1-N: Output overwrite count. */
size_t lcontinue; /* 1-N: Output line continue value. */
size_t totalcount; /* 1-N: Output overwrite count. */
/* Busy state. */
int busy_ref; /* Busy reference count. */
int busy_ch; /* Busy character. */
size_t busy_fx; /* Busy character x coordinate. */
size_t busy_oldy; /* Saved y coordinate. */
size_t busy_oldx; /* Saved x coordinate. */
struct timespec busy_ts;/* Busy timer. */
MARK sel; /* Select start position. */
CHAR_T *mcs; /* Match character list. */
char *ps; /* Paragraph plus section list. */
u_long u_ccnt; /* Undo command count. */
CHAR_T lastckey; /* Last search character. */
cdir_t csearchdir; /* Character search direction. */
SMAP *h_smap; /* First slot of the line map. */
SMAP *t_smap; /* Last slot of the line map. */
/*
* One extra slot is always allocated for the map so that we can use
* it to do vi :colon command input; see v_tcmd().
*/
recno_t sv_tm_lno; /* tcmd: saved TMAP lno field. */
size_t sv_tm_coff; /* tcmd: saved TMAP coff field. */
size_t sv_tm_soff; /* tcmd: saved TMAP soff field. */
size_t sv_t_maxrows; /* tcmd: saved t_maxrows. */
size_t sv_t_minrows; /* tcmd: saved t_minrows. */
size_t sv_t_rows; /* tcmd: saved t_rows. */
#define SIZE_HMAP(sp) (VIP(sp)->srows + 1)
/*
* Macros to get to the head/tail of the smap. If the screen only has
* one line, HMAP can be equal to TMAP, so the code has to understand
* the off-by-one errors that can result. If stepping through an SMAP
* and operating on each entry, use sp->t_rows as the count of slots,
* don't use a loop that compares <= TMAP.
*/
#define _HMAP(sp) (VIP(sp)->h_smap)
#define HMAP _HMAP(sp)
#define _TMAP(sp) (VIP(sp)->t_smap)
#define TMAP _TMAP(sp)
recno_t ss_lno; /* 1-N: vi_opt_screens cached line number. */
size_t ss_screens; /* vi_opt_screens cached return value. */
#define VI_SCR_CFLUSH(vip) vip->ss_lno = OOBLNO
size_t srows; /* 1-N: rows in the terminal/window. */
recno_t olno; /* 1-N: old cursor file line. */
size_t ocno; /* 0-N: old file cursor column. */
size_t sc_col; /* 0-N: LOGICAL screen column. */
SMAP *sc_smap; /* SMAP entry where sc_col occurs. */
#define VIP_CUR_INVALID 0x0001 /* Cursor position is unknown. */
#define VIP_DIVIDER 0x0002 /* Divider line was displayed. */
#define VIP_N_EX_PAINT 0x0004 /* Clear and repaint when ex finishes. */
#define VIP_N_EX_REDRAW 0x0008 /* Schedule SC_SCR_REDRAW when ex finishes. */
#define VIP_N_REFRESH 0x0010 /* Repaint (from SMAP) on the next refresh. */
#define VIP_N_RENUMBER 0x0020 /* Renumber screen on the next refresh. */
#define VIP_RCM_LAST 0x0040 /* Cursor drawn to the last column. */
#define VIP_S_MODELINE 0x0080 /* Skip next modeline refresh. */
#define VIP_S_REFRESH 0x0100 /* Skip next refresh. */
u_int16_t flags;
} VI_PRIVATE;
/* Vi private area. */
#define VIP(sp) ((VI_PRIVATE *)((sp)->vi_private))
#define O_NUMBER_FMT "%7lu " /* O_NUMBER format, length. */
#define O_NUMBER_LENGTH 8
#define SCREEN_COLS(sp) /* Screen columns. */ \
((O_ISSET(sp, O_NUMBER) ? (sp)->cols - O_NUMBER_LENGTH : (sp)->cols))
/*
* LASTLINE is the zero-based, last line in the screen. Note that it is correct
* regardless of the changes in the screen to permit text input on the last line
* of the screen, or the existence of small screens.
*/
#define LASTLINE(sp) \
((sp)->t_maxrows < (sp)->rows ? (sp)->t_maxrows : (sp)->rows - 1)
/*
* Small screen (see vs_refresh.c, section 6a) and one-line screen test.
* Note, both cannot be true for the same screen.
*/
#define IS_SMALL(sp) ((sp)->t_minrows != (sp)->t_maxrows)
#define IS_ONELINE(sp) ((sp)->rows == 1)
#define HALFTEXT(sp) /* Half text. */ \
((sp)->t_rows == 1 ? 1 : (sp)->t_rows / 2)
#define HALFSCREEN(sp) /* Half text screen. */ \
((sp)->t_maxrows == 1 ? 1 : (sp)->t_maxrows / 2)
/*
* Next tab offset.
*
* !!!
* There are problems with how the historical vi handled tabs. For example,
* by doing "set ts=3" and building lines that fold, you can get it to step
* through tabs as if they were spaces and move inserted characters to new
* positions when <esc> is entered. I believe that nvi does tabs correctly,
* but there are some historical incompatibilities.
*/
#define TAB_OFF(c) COL_OFF((c), O_VAL(sp, O_TABSTOP))
/* If more than one horizontal screen being shown. */
#define IS_HSPLIT(sp) \
((sp)->rows != O_VAL(sp, O_LINES))
/* If more than one vertical screen being shown. */
#define IS_VSPLIT(sp) \
((sp)->cols != O_VAL(sp, O_COLUMNS))
/* If more than one screen being shown. */
#define IS_SPLIT(sp) \
(IS_HSPLIT(sp) || IS_VSPLIT(sp))
/* Screen adjustment operations. */
typedef enum { A_DECREASE, A_INCREASE, A_SET } adj_t;
/* Screen position operations. */
typedef enum { P_BOTTOM, P_FILL, P_MIDDLE, P_TOP } pos_t;
/* Scrolling operations. */
typedef enum {
CNTRL_B, CNTRL_D, CNTRL_E, CNTRL_F,
CNTRL_U, CNTRL_Y, Z_CARAT, Z_PLUS
} scroll_t;
/* Vi common error messages. */
typedef enum {
VIM_COMBUF, VIM_EMPTY, VIM_EOF, VIM_EOL,
VIM_NOCOM, VIM_NOCOM_B, VIM_USAGE, VIM_WRESIZE
} vim_t;
#include "extern.h"