/* $OpenBSD: v_left.c,v 1.7 2022/12/26 19:16:04 jmc Exp $ */ /*- * 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. */ #include "config.h" #include <sys/types.h> #include <sys/queue.h> #include <sys/time.h> #include <bitstring.h> #include <limits.h> #include <stdio.h> #include "../common/common.h" #include "vi.h" /* * v_left -- [count]^H, [count]h * Move left by columns. * * PUBLIC: int v_left(SCR *, VICMD *); */ int v_left(SCR *sp, VICMD *vp) { recno_t cnt; /* * !!! * The ^H and h commands always failed in the first column. */ if (vp->m_start.cno == 0) { v_sol(sp); return (1); } /* Find the end of the range. */ cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; if (vp->m_start.cno > cnt) vp->m_stop.cno = vp->m_start.cno - cnt; else vp->m_stop.cno = 0; /* * All commands move to the end of the range. Motion commands * adjust the starting point to the character before the current * one. */ if (ISMOTION(vp)) --vp->m_start.cno; vp->m_final = vp->m_stop; return (0); } /* * v_cfirst -- [count]_ * Move to the first non-blank character in a line. * * PUBLIC: int v_cfirst(SCR *, VICMD *); */ int v_cfirst(SCR *sp, VICMD *vp) { recno_t cnt, lno; /* * !!! * If the _ is a motion component, it makes the command a line motion * e.g. "d_" deletes the line. It also means that the cursor doesn't * move. * * The _ command never failed in the first column. */ if (ISMOTION(vp)) F_SET(vp, VM_LMODE); /* * !!! * Historically a specified count makes _ move down count - 1 * rows, so, "3_" is the same as "2j_". */ cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; if (cnt != 1) { --vp->count; return (v_down(sp, vp)); } /* * Move to the first non-blank. * * Can't just use RCM_SET_FNB, in case _ is used as the motion * component of another command. */ vp->m_stop.cno = 0; if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno)) return (1); /* * !!! * The _ command has to fail if the file is empty and we're doing * a delete. If deleting line 1, and 0 is the first nonblank, * make the check. */ if (vp->m_stop.lno == 1 && vp->m_stop.cno == 0 && ISCMD(vp->rkp, 'd')) { if (db_last(sp, &lno)) return (1); if (lno == 0) { v_sol(sp); return (1); } } /* * Delete and non-motion commands move to the end of the range, * yank stays at the start. Ignore others. */ vp->m_final = ISMOTION(vp) && ISCMD(vp->rkp, 'y') ? vp->m_start : vp->m_stop; return (0); } /* * v_first -- ^ * Move to the first non-blank character in this line. * * PUBLIC: int v_first(SCR *, VICMD *); */ int v_first(SCR *sp, VICMD *vp) { /* * !!! * Yielding to none in our quest for compatibility with every * historical blemish of vi, no matter how strange it might be, * we permit the user to enter a count and then ignore it. */ /* * Move to the first non-blank. * * Can't just use RCM_SET_FNB, in case ^ is used as the motion * component of another command. */ vp->m_stop.cno = 0; if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno)) return (1); /* * !!! * The ^ command succeeded if used as a command when the cursor was * on the first non-blank in the line, but failed if used as a motion * component in the same situation. */ if (ISMOTION(vp) && vp->m_start.cno == vp->m_stop.cno) { v_sol(sp); return (1); } /* * If moving right, non-motion commands move to the end of the range. * Delete and yank stay at the start. Motion commands adjust the * ending point to the character before the current ending character. * * If moving left, all commands move to the end of the range. Motion * commands adjust the starting point to the character before the * current starting character. */ if (vp->m_start.cno < vp->m_stop.cno) if (ISMOTION(vp)) { --vp->m_stop.cno; vp->m_final = vp->m_start; } else vp->m_final = vp->m_stop; else { if (ISMOTION(vp)) --vp->m_start.cno; vp->m_final = vp->m_stop; } return (0); } /* * v_ncol -- [count]| * Move to column count or the first column on this line. If the * requested column is past EOL, move to EOL. The nasty part is * that we have to know character column widths to make this work. * * PUBLIC: int v_ncol(SCR *, VICMD *); */ int v_ncol(SCR *sp, VICMD *vp) { if (F_ISSET(vp, VC_C1SET) && vp->count > 1) { --vp->count; vp->m_stop.cno = vs_colpos(sp, vp->m_start.lno, (size_t)vp->count); /* * !!! * The | command succeeded if used as a command and the cursor * didn't move, but failed if used as a motion component in the * same situation. */ if (ISMOTION(vp) && vp->m_stop.cno == vp->m_start.cno) { v_nomove(sp); return (1); } } else { /* * !!! * The | command succeeded if used as a command in column 0 * without a count, but failed if used as a motion component * in the same situation. */ if (ISMOTION(vp) && vp->m_start.cno == 0) { v_sol(sp); return (1); } vp->m_stop.cno = 0; } /* * If moving right, non-motion commands move to the end of the range. * Delete and yank stay at the start. Motion commands adjust the * ending point to the character before the current ending character. * * If moving left, all commands move to the end of the range. Motion * commands adjust the starting point to the character before the * current starting character. */ if (vp->m_start.cno < vp->m_stop.cno) if (ISMOTION(vp)) { --vp->m_stop.cno; vp->m_final = vp->m_start; } else vp->m_final = vp->m_stop; else { if (ISMOTION(vp)) --vp->m_start.cno; vp->m_final = vp->m_stop; } return (0); } /* * v_zero -- 0 * Move to the first column on this line. * * PUBLIC: int v_zero(SCR *, VICMD *); */ int v_zero(SCR *sp, VICMD *vp) { /* * !!! * The 0 command succeeded if used as a command in the first column * but failed if used as a motion component in the same situation. */ if (ISMOTION(vp) && vp->m_start.cno == 0) { v_sol(sp); return (1); } /* * All commands move to the end of the range. Motion commands * adjust the starting point to the character before the current * one. */ vp->m_stop.cno = 0; if (ISMOTION(vp)) --vp->m_start.cno; vp->m_final = vp->m_stop; return (0); }
