/* $NetBSD: v_z.c,v 1.3 2014/01/26 21:43:45 christos 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/cdefs.h> #if 0 #ifndef lint static const char sccsid[] = "Id: v_z.c,v 10.12 2001/06/25 15:19:36 skimo Exp (Berkeley) Date: 2001/06/25 15:19:36 "; #endif /* not lint */ #else __RCSID("$NetBSD: v_z.c,v 1.3 2014/01/26 21:43:45 christos Exp $"); #endif #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_z -- [count]z[count][-.+^<CR>] * Move the screen. * * PUBLIC: int v_z __P((SCR *, VICMD *)); */ int v_z(SCR *sp, VICMD *vp) { db_recno_t lno; e_key_t value; /* * The first count is the line to use. If the value doesn't * exist, use the last line. */ if (F_ISSET(vp, VC_C1SET)) { lno = vp->count; if (!db_exist(sp, lno) && db_last(sp, &lno)) return (1); } else lno = vp->m_start.lno; /* Set default return cursor line. */ vp->m_final.lno = lno; vp->m_final.cno = vp->m_start.cno; /* * The second count is the displayed window size, i.e. the 'z' command * is another way to get artificially small windows. Note, you can't * grow beyond the size of the window. * * !!! * A window size of 0 was historically allowed, and simply ignored. * This could be much more simply done by modifying the value of the * O_WINDOW option, but that's not how it worked historically. */ if (F_ISSET(vp, VC_C2SET) && vp->count2 != 0) { if (vp->count2 > O_VAL(sp, O_WINDOW)) vp->count2 = O_VAL(sp, O_WINDOW); if (vs_crel(sp, vp->count2)) return (1); } switch (vp->character) { case '-': /* Put the line at the bottom. */ if (vs_sm_fill(sp, lno, P_BOTTOM)) return (1); break; case '.': /* Put the line in the middle. */ if (vs_sm_fill(sp, lno, P_MIDDLE)) return (1); break; case '+': /* * If the user specified a line number, put that line at the * top and move the cursor to it. Otherwise, scroll forward * a screen from the current screen. */ if (F_ISSET(vp, VC_C1SET)) { if (vs_sm_fill(sp, lno, P_TOP)) return (1); if (vs_sm_position(sp, &vp->m_final, 0, P_TOP)) return (1); } else if (vs_sm_scroll(sp, &vp->m_final, sp->t_rows, Z_PLUS)) return (1); break; case '^': /* * If the user specified a line number, put that line at the * bottom, move the cursor to it, and then display the screen * before that one. Otherwise, scroll backward a screen from * the current screen. * * !!! * Note, we match the off-by-one characteristics of historic * vi, here. */ if (F_ISSET(vp, VC_C1SET)) { if (vs_sm_fill(sp, lno, P_BOTTOM)) return (1); if (vs_sm_position(sp, &vp->m_final, 0, P_TOP)) return (1); if (vs_sm_fill(sp, vp->m_final.lno, P_BOTTOM)) return (1); } else if (vs_sm_scroll(sp, &vp->m_final, sp->t_rows, Z_CARAT)) return (1); break; default: /* Put the line at the top for <cr>. */ value = KEY_VAL(sp, vp->character); if (value != K_CR && value != K_NL) { v_emsg(sp, vp->kp->usage, VIM_USAGE); return (1); } if (vs_sm_fill(sp, lno, P_TOP)) return (1); break; } return (0); } /* * vs_crel -- * Change the relative size of the current screen. * * PUBLIC: int vs_crel __P((SCR *, long)); */ int vs_crel(SCR *sp, long int count) { sp->t_minrows = sp->t_rows = count; if (sp->t_rows > sp->rows - 1) sp->t_minrows = sp->t_rows = sp->rows - 1; TMAP = HMAP + (sp->t_rows - 1); F_SET(sp, SC_SCR_REDRAW); return (0); }