/*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char sccsid[] = "@(#)ex_join.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include <ctype.h> #include <stdlib.h> #include <string.h> #include "vi.h" #include "excmd.h" /* * ex_join -- :[line [,line]] j[oin][!] [count] [flags] * Join lines. */ int ex_join(sp, ep, cmdp) SCR *sp; EXF *ep; EXCMDARG *cmdp; { recno_t from, to; size_t blen, clen, len, tlen; int echar, first; char *bp, *p, *tbp; from = cmdp->addr1.lno; to = cmdp->addr2.lno; /* Check for no lines to join. */ if ((p = file_gline(sp, ep, from + 1, &len)) == NULL) { msgq(sp, M_ERR, "No remaining lines to join."); return (1); } GET_SPACE(sp, bp, blen, 256); clen = tlen = 0; for (first = 1, from = cmdp->addr1.lno, to = cmdp->addr2.lno + 1; from <= to; ++from) { /* * Get next line. Historic versions of vi allowed "10J" while * less than 10 lines from the end-of-file, so we do too. */ if ((p = file_gline(sp, ep, from, &len)) == NULL) break; /* Empty lines just go away. */ if (len == 0) continue; /* * Get more space if necessary. Note, tlen isn't the length * of the new line, it's roughly the amount of space needed. * tbp - bp is the length of the new line. */ tlen += len + 2; ADD_SPACE(sp, bp, blen, tlen); tbp = bp + clen; /* * Historic practice: * * If force specified, join without modification. * If the current line ends with whitespace, strip leading * whitespace from the joined line. * If the next line starts with a ), do nothing. * If the current line ends with ., ? or !, insert two spaces. * Else, insert one space. * * Echar is the last character in the last line joined. */ if (!first && !F_ISSET(cmdp, E_FORCE)) { if (isspace(echar)) for (; len && isspace(*p); --len, ++p); else if (p[0] != ')') { if (strchr(".?!", echar)) *tbp++ = ' '; *tbp++ = ' '; ++clen; for (; len && isspace(*p); --len, ++p); } } else first = 0; if (len != 0) { memmove(tbp, p, len); tbp += len; clen += len; echar = p[len - 1]; } else echar = ' '; /* * Historic practice for vi was to put the cursor at the first * inserted whitespace character, if there was one, or the * first character of the joined line, if there wasn't. If * a count was specified, the cursor was moved as described * for the first line joined, ignoring subsequent lines. If * the join was a ':' command, the cursor was placed at the * first non-blank character of the line unless the cursor was * "attracted" to the end of line when the command was executed * in which case it moved to the new end of line. There are * probably several more special cases, but frankly, my dear, * I don't give a damn. This implementation puts the cursor * on the first inserted whitespace character or the first * character of the joined line, regardless. Note, if the * cursor isn't on the joined line (possible with : commands), * it is reset to the starting line. */ sp->cno = (tbp - bp) - len - 1; } sp->lno = cmdp->addr1.lno; /* Delete the joined lines. */ for (from = cmdp->addr1.lno, to = cmdp->addr2.lno + 1; to > from; --to) if (file_dline(sp, ep, to)) goto err; /* Reset the original line. */ if (file_sline(sp, ep, from, bp, tbp - bp)) { err: FREE_SPACE(sp, bp, blen); return (1); } FREE_SPACE(sp, bp, blen); sp->rptlines[L_JOINED] += cmdp->addr2.lno - cmdp->addr1.lno; F_SET(sp, S_AUTOPRINT); return (0); }