| 1 | /* Copyright (c) 1980 Regents of the University of California */ |
| 2 | /* sccs id: @(#)ex_vis.h 6.1 10/18/80 */ |
| 3 | /* |
| 4 | * Ex version 3 |
| 5 | * Mark Horton, UCB |
| 6 | * Bill Joy UCB |
| 7 | * |
| 8 | * Open and visual mode definitions. |
| 9 | * |
| 10 | * There are actually 4 major states in open/visual modes. These |
| 11 | * are visual, crt open (where the cursor can move about the screen and |
| 12 | * the screen can scroll and be erased), one line open (on dumb glass-crt's |
| 13 | * like the adm3), and hardcopy open (for everything else). |
| 14 | * |
| 15 | * The basic state is given by bastate, and the current state by state, |
| 16 | * since we can be in pseudo-hardcopy mode if we are on an adm3 and the |
| 17 | * line is longer than 80. |
| 18 | */ |
| 19 | |
| 20 | short bastate; |
| 21 | short state; |
| 22 | |
| 23 | #define VISUAL 0 |
| 24 | #define CRTOPEN 1 |
| 25 | #define ONEOPEN 2 |
| 26 | #define HARDOPEN 3 |
| 27 | |
| 28 | /* |
| 29 | * The screen in visual and crtopen is of varying size; the basic |
| 30 | * window has top basWTOP and basWLINES lines are thereby implied. |
| 31 | * The current window (which may have grown from the basic size) |
| 32 | * has top WTOP and WLINES lines. The top line of the window is WTOP, |
| 33 | * and the bottom line WBOT. The line WECHO is used for messages, |
| 34 | * search strings and the like. If WBOT==WECHO then we are in ONEOPEN |
| 35 | * or HARDOPEN and there is no way back to the line we were on if we |
| 36 | * go to WECHO (i.e. we will have to scroll before we go there, and |
| 37 | * we can't get back). There are WCOLS columns per line. |
| 38 | * If WBOT!=WECHO then WECHO will be the last line on the screen |
| 39 | * and WBOT is the line before it. |
| 40 | */ |
| 41 | short basWTOP; |
| 42 | short basWLINES; |
| 43 | short WTOP; |
| 44 | short WBOT; |
| 45 | short WLINES; |
| 46 | short WCOLS; |
| 47 | short WECHO; |
| 48 | |
| 49 | /* |
| 50 | * When we are dealing with the echo area we consider the window |
| 51 | * to be "split" and set the variable splitw. Otherwise, moving |
| 52 | * off the bottom of the screen into WECHO causes a screen rollup. |
| 53 | */ |
| 54 | bool splitw; |
| 55 | |
| 56 | /* |
| 57 | * Information about each line currently on the screen includes |
| 58 | * the y coordinate associated with the line, the printing depth |
| 59 | * of the line (0 indicates unknown), and a mask which indicates |
| 60 | * whether the line is "unclean", i.e. whether we should check |
| 61 | * to make sure the line is displayed correctly at the next |
| 62 | * appropriate juncture. |
| 63 | */ |
| 64 | struct vlinfo { |
| 65 | char vliny; /* Y coordinate */ |
| 66 | char vdepth; /* Depth of displayed line */ |
| 67 | short vflags; /* Is line potentially dirty ? */ |
| 68 | } vlinfo[TUBELINES + 2]; |
| 69 | |
| 70 | #define DEPTH(c) (vlinfo[c].vdepth) |
| 71 | #define LINE(c) (vlinfo[c].vliny) |
| 72 | #define FLAGS(c) (vlinfo[c].vflags) |
| 73 | |
| 74 | #define VDIRT 1 |
| 75 | |
| 76 | /* |
| 77 | * Hacks to copy vlinfo structures around |
| 78 | */ |
| 79 | #ifdef V6 |
| 80 | /* Kludge to make up for no structure assignment */ |
| 81 | struct { |
| 82 | long longi; |
| 83 | }; |
| 84 | # define vlcopy(i, j) i.longi = j.longi |
| 85 | #else |
| 86 | # define vlcopy(i, j) i = j; |
| 87 | #endif |
| 88 | |
| 89 | /* |
| 90 | * The current line on the screen is represented by vcline. |
| 91 | * There are vcnt lines on the screen, the last being "vcnt - 1". |
| 92 | * Vcline is intimately tied to the current value of dot, |
| 93 | * and when command mode is used as a subroutine fancy footwork occurs. |
| 94 | */ |
| 95 | short vcline; |
| 96 | short vcnt; |
| 97 | |
| 98 | /* |
| 99 | * To allow many optimizations on output, an exact image of the terminal |
| 100 | * screen is maintained in the space addressed by vtube0. The vtube |
| 101 | * array indexes this space as lines, and is shuffled on scrolls, insert+delete |
| 102 | * lines and the like rather than (more expensively) shuffling the screen |
| 103 | * data itself. It is also rearranged during insert mode across line |
| 104 | * boundaries to make incore work easier. |
| 105 | */ |
| 106 | char *vtube[TUBELINES]; |
| 107 | char *vtube0; |
| 108 | |
| 109 | /* |
| 110 | * The current cursor position within the current line is kept in |
| 111 | * cursor. The current line is kept in linebuf. During insertions |
| 112 | * we use the auxiliary array genbuf as scratch area. |
| 113 | * The cursor wcursor and wdot are used in operations within/spanning |
| 114 | * lines to mark the other end of the affected area, or the target |
| 115 | * for a motion. |
| 116 | */ |
| 117 | char *cursor; |
| 118 | char *wcursor; |
| 119 | line *wdot; |
| 120 | |
| 121 | /* |
| 122 | * Undo information is saved in a LBSIZE buffer at "vutmp" for changes |
| 123 | * within the current line, or as for command mode for multi-line changes |
| 124 | * or changes on lines no longer the current line. |
| 125 | * The change kind "VCAPU" is used immediately after a U undo to prevent |
| 126 | * two successive U undo's from destroying the previous state. |
| 127 | */ |
| 128 | #define VNONE 0 |
| 129 | #define VCHNG 1 |
| 130 | #define VMANY 2 |
| 131 | #define VCAPU 3 |
| 132 | #define VMCHNG 4 |
| 133 | #define VMANYINS 5 |
| 134 | |
| 135 | short vundkind; /* Which kind of undo - from above */ |
| 136 | char *vutmp; /* Prev line image when "VCHNG" */ |
| 137 | |
| 138 | /* |
| 139 | * State information for undoing of macros. The basic idea is that |
| 140 | * if the macro does only 1 change or even none, we don't treat it |
| 141 | * specially. If it does 2 or more changes we want to be able to |
| 142 | * undo it as a unit. We remember how many changes have been made |
| 143 | * within the current macro. (Remember macros can be nested.) |
| 144 | */ |
| 145 | #define VC_NOTINMAC 0 /* Not in a macro */ |
| 146 | #define VC_NOCHANGE 1 /* In a macro, no changes so far */ |
| 147 | #define VC_ONECHANGE 2 /* In a macro, one change so far */ |
| 148 | #define VC_MANYCHANGE 3 /* In a macro, at least 2 changes so far */ |
| 149 | |
| 150 | short vch_mac; /* Change state - one of the above */ |
| 151 | |
| 152 | /* |
| 153 | * For U undo's the line is grabbed by "vmove" after it first appears |
| 154 | * on that line. The "vUNDdot" which specifies which line has been |
| 155 | * saved is selectively cleared when changes involving other lines |
| 156 | * are made, i.e. after a 'J' join. This is because a 'JU' would |
| 157 | * lose completely the text of the line just joined on. |
| 158 | */ |
| 159 | char *vUNDcurs; /* Cursor just before 'U' */ |
| 160 | line *vUNDdot; /* The line address of line saved in vUNDsav */ |
| 161 | line vUNDsav; /* Grabbed initial "*dot" */ |
| 162 | |
| 163 | #define killU() vUNDdot = NOLINE |
| 164 | |
| 165 | /* |
| 166 | * There are a number of cases where special behaviour is needed |
| 167 | * from deeply nested routines. This is accomplished by setting |
| 168 | * the bits of hold, which acts to change the state of the general |
| 169 | * visual editing behaviour in specific ways. |
| 170 | * |
| 171 | * HOLDAT prevents the clreol (clear to end of line) routines from |
| 172 | * putting out @'s or ~'s on empty lines. |
| 173 | * |
| 174 | * HOLDDOL prevents the reopen routine from putting a '$' at the |
| 175 | * end of a reopened line in list mode (for hardcopy mode, e.g.). |
| 176 | * |
| 177 | * HOLDROL prevents spurious blank lines when scrolling in hardcopy |
| 178 | * open mode. |
| 179 | * |
| 180 | * HOLDQIK prevents the fake insert mode during repeated commands. |
| 181 | * |
| 182 | * HOLDPUPD prevents updating of the physical screen image when |
| 183 | * mucking around while in insert mode. |
| 184 | * |
| 185 | * HOLDECH prevents clearing of the echo area while rolling the screen |
| 186 | * backwards (e.g.) in deference to the clearing of the area at the |
| 187 | * end of the scroll (1 time instead of n times). The fact that this |
| 188 | * is actually needed is recorded in heldech, which says that a clear |
| 189 | * of the echo area was actually held off. |
| 190 | */ |
| 191 | short hold; |
| 192 | short holdupd; /* Hold off update when echo line is too long */ |
| 193 | |
| 194 | #define HOLDAT 1 |
| 195 | #define HOLDDOL 2 |
| 196 | #define HOLDROL 4 |
| 197 | #define HOLDQIK 8 |
| 198 | #define HOLDPUPD 16 |
| 199 | #define HOLDECH 32 |
| 200 | #define HOLDWIG 64 |
| 201 | |
| 202 | /* |
| 203 | * Miscellaneous variables |
| 204 | */ |
| 205 | short CDCNT; /* Count of ^D's in insert on this line */ |
| 206 | char DEL[VBSIZE]; /* Last deleted text */ |
| 207 | bool HADUP; /* This insert line started with ^ then ^D */ |
| 208 | bool HADZERO; /* This insert line started with 0 then ^D */ |
| 209 | char INS[VBSIZE]; /* Last inserted text */ |
| 210 | int Vlines; /* Number of file lines "before" vi command */ |
| 211 | int Xcnt; /* External variable holding last cmd's count */ |
| 212 | bool Xhadcnt; /* Last command had explicit count? */ |
| 213 | short ZERO; |
| 214 | short dir; /* Direction for search (+1 or -1) */ |
| 215 | short doomed; /* Disply chars right of cursor to be killed */ |
| 216 | bool gobblebl; /* Wrapmargin space generated nl, eat a space */ |
| 217 | bool hadcnt; /* (Almost) internal to vmain() */ |
| 218 | bool heldech; /* We owe a clear of echo area */ |
| 219 | bool insmode; /* Are in character insert mode */ |
| 220 | char lastcmd[5]; /* Chars in last command */ |
| 221 | int lastcnt; /* Count for last command */ |
| 222 | char *lastcp; /* Save current command here to repeat */ |
| 223 | bool lasthad; /* Last command had a count? */ |
| 224 | short lastvgk; /* Previous input key, if not from keyboard */ |
| 225 | short lastreg; /* Register with last command */ |
| 226 | char *ncols['z'-'a'+2]; /* Cursor positions of marks */ |
| 227 | char *notenam; /* Name to be noted with change count */ |
| 228 | char *notesgn; /* Change count from last command */ |
| 229 | char op; /* Operation of current command */ |
| 230 | short Peekkey; /* Peek ahead key */ |
| 231 | bool rubble; /* Line is filthy (in hardcopy open), redraw! */ |
| 232 | int vSCROLL; /* Number lines to scroll on ^D/^U */ |
| 233 | char *vglobp; /* Untyped input (e.g. repeat insert text) */ |
| 234 | char vmacbuf[VBSIZE]; /* Text of visual macro, hence nonnestable */ |
| 235 | char *vmacp; /* Like vglobp but for visual macros */ |
| 236 | char *vmcurs; /* Cursor for restore after undo d), e.g. */ |
| 237 | short vmovcol; /* Column to try to keep on arrow keys */ |
| 238 | bool vmoving; /* Are trying to keep vmovcol */ |
| 239 | char vreg; /* Register for this command */ |
| 240 | short wdkind; /* Liberal/conservative words? */ |
| 241 | char workcmd[5]; /* Temporary for lastcmd */ |
| 242 | |
| 243 | |
| 244 | /* |
| 245 | * Macros |
| 246 | */ |
| 247 | #define INF 30000 |
| 248 | #define LASTLINE LINE(vcnt) |
| 249 | #define OVERBUF QUOTE |
| 250 | #define beep obeep |
| 251 | #define cindent() ((outline - vlinfo[vcline].vliny) * WCOLS + outcol) |
| 252 | #define vputp(cp, cnt) tputs(cp, cnt, vputch) |
| 253 | #define vputc(c) putch(c) |
| 254 | |
| 255 | /* |
| 256 | * Function types |
| 257 | */ |
| 258 | int beep(); |
| 259 | int qcount(); |
| 260 | int vchange(); |
| 261 | int vdelete(); |
| 262 | int vgrabit(); |
| 263 | int vinschar(); |
| 264 | int vmove(); |
| 265 | int vputchar(); |
| 266 | int vshift(); |
| 267 | int vyankit(); |