1 /* Copyright (c) 1980 Regents of the University of California */ 2 /* sccs id: @(#)ex_vis.h 5.1 08/20/80 */ 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(); 268