1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #include <sys/types.h> 13 #include <sys/queue.h> 14 #include <sys/time.h> 15 16 #include <bitstring.h> 17 #include <limits.h> 18 #include <stdio.h> 19 20 #include "../common/common.h" 21 #include "vi.h" 22 23 /* 24 * v_left -- [count]^H, [count]h 25 * Move left by columns. 26 * 27 * PUBLIC: int v_left(SCR *, VICMD *); 28 */ 29 int 30 v_left(SCR *sp, VICMD *vp) 31 { 32 recno_t cnt; 33 34 /* 35 * !!! 36 * The ^H and h commands always failed in the first column. 37 */ 38 if (vp->m_start.cno == 0) { 39 v_sol(sp); 40 return (1); 41 } 42 43 /* Find the end of the range. */ 44 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; 45 if (vp->m_start.cno > cnt) 46 vp->m_stop.cno = vp->m_start.cno - cnt; 47 else 48 vp->m_stop.cno = 0; 49 50 /* 51 * All commands move to the end of the range. Motion commands 52 * adjust the starting point to the character before the current 53 * one. 54 */ 55 if (ISMOTION(vp)) 56 --vp->m_start.cno; 57 vp->m_final = vp->m_stop; 58 return (0); 59 } 60 61 /* 62 * v_cfirst -- [count]_ 63 * Move to the first non-blank character in a line. 64 * 65 * PUBLIC: int v_cfirst(SCR *, VICMD *); 66 */ 67 int 68 v_cfirst(SCR *sp, VICMD *vp) 69 { 70 recno_t cnt, lno; 71 72 /* 73 * !!! 74 * If the _ is a motion component, it makes the command a line motion 75 * e.g. "d_" deletes the line. It also means that the cursor doesn't 76 * move. 77 * 78 * The _ command never failed in the first column. 79 */ 80 if (ISMOTION(vp)) 81 F_SET(vp, VM_LMODE); 82 /* 83 * !!! 84 * Historically a specified count makes _ move down count - 1 85 * rows, so, "3_" is the same as "2j_". 86 */ 87 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; 88 if (cnt != 1) { 89 --vp->count; 90 return (v_down(sp, vp)); 91 } 92 93 /* 94 * Move to the first non-blank. 95 * 96 * Can't just use RCM_SET_FNB, in case _ is used as the motion 97 * component of another command. 98 */ 99 vp->m_stop.cno = 0; 100 if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno)) 101 return (1); 102 103 /* 104 * !!! 105 * The _ command has to fail if the file is empty and we're doing 106 * a delete. If deleting line 1, and 0 is the first nonblank, 107 * make the check. 108 */ 109 if (vp->m_stop.lno == 1 && 110 vp->m_stop.cno == 0 && ISCMD(vp->rkp, 'd')) { 111 if (db_last(sp, &lno)) 112 return (1); 113 if (lno == 0) { 114 v_sol(sp); 115 return (1); 116 } 117 } 118 119 /* 120 * Delete and non-motion commands move to the end of the range, 121 * yank stays at the start. Ignore others. 122 */ 123 vp->m_final = 124 ISMOTION(vp) && ISCMD(vp->rkp, 'y') ? vp->m_start : vp->m_stop; 125 return (0); 126 } 127 128 /* 129 * v_first -- ^ 130 * Move to the first non-blank character in this line. 131 * 132 * PUBLIC: int v_first(SCR *, VICMD *); 133 */ 134 int 135 v_first(SCR *sp, VICMD *vp) 136 { 137 /* 138 * !!! 139 * Yielding to none in our quest for compatibility with every 140 * historical blemish of vi, no matter how strange it might be, 141 * we permit the user to enter a count and then ignore it. 142 */ 143 144 /* 145 * Move to the first non-blank. 146 * 147 * Can't just use RCM_SET_FNB, in case ^ is used as the motion 148 * component of another command. 149 */ 150 vp->m_stop.cno = 0; 151 if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno)) 152 return (1); 153 154 /* 155 * !!! 156 * The ^ command succeeded if used as a command when the cursor was 157 * on the first non-blank in the line, but failed if used as a motion 158 * component in the same situation. 159 */ 160 if (ISMOTION(vp) && vp->m_start.cno == vp->m_stop.cno) { 161 v_sol(sp); 162 return (1); 163 } 164 165 /* 166 * If moving right, non-motion commands move to the end of the range. 167 * Delete and yank stay at the start. Motion commands adjust the 168 * ending point to the character before the current ending charcter. 169 * 170 * If moving left, all commands move to the end of the range. Motion 171 * commands adjust the starting point to the character before the 172 * current starting character. 173 */ 174 if (vp->m_start.cno < vp->m_stop.cno) 175 if (ISMOTION(vp)) { 176 --vp->m_stop.cno; 177 vp->m_final = vp->m_start; 178 } else 179 vp->m_final = vp->m_stop; 180 else { 181 if (ISMOTION(vp)) 182 --vp->m_start.cno; 183 vp->m_final = vp->m_stop; 184 } 185 return (0); 186 } 187 188 /* 189 * v_ncol -- [count]| 190 * Move to column count or the first column on this line. If the 191 * requested column is past EOL, move to EOL. The nasty part is 192 * that we have to know character column widths to make this work. 193 * 194 * PUBLIC: int v_ncol(SCR *, VICMD *); 195 */ 196 int 197 v_ncol(SCR *sp, VICMD *vp) 198 { 199 if (F_ISSET(vp, VC_C1SET) && vp->count > 1) { 200 --vp->count; 201 vp->m_stop.cno = 202 vs_colpos(sp, vp->m_start.lno, (size_t)vp->count); 203 /* 204 * !!! 205 * The | command succeeded if used as a command and the cursor 206 * didn't move, but failed if used as a motion component in the 207 * same situation. 208 */ 209 if (ISMOTION(vp) && vp->m_stop.cno == vp->m_start.cno) { 210 v_nomove(sp); 211 return (1); 212 } 213 } else { 214 /* 215 * !!! 216 * The | command succeeded if used as a command in column 0 217 * without a count, but failed if used as a motion component 218 * in the same situation. 219 */ 220 if (ISMOTION(vp) && vp->m_start.cno == 0) { 221 v_sol(sp); 222 return (1); 223 } 224 vp->m_stop.cno = 0; 225 } 226 227 /* 228 * If moving right, non-motion commands move to the end of the range. 229 * Delete and yank stay at the start. Motion commands adjust the 230 * ending point to the character before the current ending charcter. 231 * 232 * If moving left, all commands move to the end of the range. Motion 233 * commands adjust the starting point to the character before the 234 * current starting character. 235 */ 236 if (vp->m_start.cno < vp->m_stop.cno) 237 if (ISMOTION(vp)) { 238 --vp->m_stop.cno; 239 vp->m_final = vp->m_start; 240 } else 241 vp->m_final = vp->m_stop; 242 else { 243 if (ISMOTION(vp)) 244 --vp->m_start.cno; 245 vp->m_final = vp->m_stop; 246 } 247 return (0); 248 } 249 250 /* 251 * v_zero -- 0 252 * Move to the first column on this line. 253 * 254 * PUBLIC: int v_zero(SCR *, VICMD *); 255 */ 256 int 257 v_zero(SCR *sp, VICMD *vp) 258 { 259 /* 260 * !!! 261 * The 0 command succeeded if used as a command in the first column 262 * but failed if used as a motion component in the same situation. 263 */ 264 if (ISMOTION(vp) && vp->m_start.cno == 0) { 265 v_sol(sp); 266 return (1); 267 } 268 269 /* 270 * All commands move to the end of the range. Motion commands 271 * adjust the starting point to the character before the current 272 * one. 273 */ 274 vp->m_stop.cno = 0; 275 if (ISMOTION(vp)) 276 --vp->m_start.cno; 277 vp->m_final = vp->m_stop; 278 return (0); 279 } 280