119304Speter/*- 219304Speter * Copyright (c) 1993, 1994 319304Speter * The Regents of the University of California. All rights reserved. 419304Speter * Copyright (c) 1993, 1994, 1995, 1996 519304Speter * Keith Bostic. All rights reserved. 619304Speter * 719304Speter * See the LICENSE file for redistribution information. 819304Speter */ 919304Speter 1019304Speter#include "config.h" 1119304Speter 1219304Speter#ifndef lint 13254225Speterstatic const char sccsid[] = "$Id: screen.c,v 10.25 2011/12/04 04:06:45 zy Exp $"; 1419304Speter#endif /* not lint */ 1519304Speter 1619304Speter#include <sys/types.h> 1719304Speter#include <sys/queue.h> 1819304Speter#include <sys/time.h> 1919304Speter 2019304Speter#include <bitstring.h> 2119304Speter#include <errno.h> 2219304Speter#include <limits.h> 2319304Speter#include <stdio.h> 2419304Speter#include <stdlib.h> 2519304Speter#include <string.h> 2619304Speter#include <unistd.h> 2719304Speter 2819304Speter#include "common.h" 2919304Speter#include "../vi/vi.h" 3019304Speter 3119304Speter/* 3219304Speter * screen_init -- 3319304Speter * Do the default initialization of an SCR structure. 3419304Speter * 35281373Sbapt * PUBLIC: int screen_init(GS *, SCR *, SCR **); 3619304Speter */ 3719304Speterint 38254225Speterscreen_init( 39254225Speter GS *gp, 40254225Speter SCR *orig, 41254225Speter SCR **spp) 4219304Speter{ 4319304Speter SCR *sp; 4419304Speter size_t len; 4519304Speter 4619304Speter *spp = NULL; 4719304Speter CALLOC_RET(orig, sp, SCR *, 1, sizeof(SCR)); 4819304Speter *spp = sp; 4919304Speter 5019304Speter/* INITIALIZED AT SCREEN CREATE. */ 5119304Speter sp->id = ++gp->id; 5219304Speter sp->refcnt = 1; 5319304Speter 54254225Speter sp->gp = gp; /* All ref the GS structure. */ 5519304Speter 56254225Speter sp->ccnt = 2; /* Anything > 1 */ 5719304Speter 5819304Speter /* 5919304Speter * XXX 6019304Speter * sp->defscroll is initialized by the opts_init() code because 6119304Speter * we don't have the option information yet. 6219304Speter */ 6319304Speter 64254225Speter TAILQ_INIT(sp->tiq); 6519304Speter 6619304Speter/* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */ 6719304Speter if (orig == NULL) { 6819304Speter sp->searchdir = NOTSET; 6919304Speter } else { 7019304Speter /* Alternate file name. */ 7119304Speter if (orig->alt_name != NULL && 7219304Speter (sp->alt_name = strdup(orig->alt_name)) == NULL) 7319304Speter goto mem; 7419304Speter 7519304Speter /* Last executed at buffer. */ 7619304Speter if (F_ISSET(orig, SC_AT_SET)) { 7719304Speter F_SET(sp, SC_AT_SET); 7819304Speter sp->at_lbuf = orig->at_lbuf; 7919304Speter } 8019304Speter 8119304Speter /* Retain searching/substitution information. */ 8219304Speter sp->searchdir = orig->searchdir == NOTSET ? NOTSET : FORWARD; 8319304Speter if (orig->re != NULL && (sp->re = 84254225Speter v_wstrdup(sp, orig->re, orig->re_len)) == NULL) 8519304Speter goto mem; 8619304Speter sp->re_len = orig->re_len; 8719304Speter if (orig->subre != NULL && (sp->subre = 88254225Speter v_wstrdup(sp, orig->subre, orig->subre_len)) == NULL) 8919304Speter goto mem; 9019304Speter sp->subre_len = orig->subre_len; 9119304Speter if (orig->repl != NULL && (sp->repl = 92254225Speter v_wstrdup(sp, orig->repl, orig->repl_len)) == NULL) 9319304Speter goto mem; 9419304Speter sp->repl_len = orig->repl_len; 9519304Speter if (orig->newl_len) { 9619304Speter len = orig->newl_len * sizeof(size_t); 9719304Speter MALLOC(sp, sp->newl, size_t *, len); 9819304Speter if (sp->newl == NULL) { 9919304Spetermem: msgq(orig, M_SYSERR, NULL); 10019304Speter goto err; 10119304Speter } 10219304Speter sp->newl_len = orig->newl_len; 10319304Speter sp->newl_cnt = orig->newl_cnt; 10419304Speter memcpy(sp->newl, orig->newl, len); 10519304Speter } 10619304Speter 10719304Speter if (opts_copy(orig, sp)) 10819304Speter goto err; 10919304Speter 11019304Speter F_SET(sp, F_ISSET(orig, SC_EX | SC_VI)); 11119304Speter } 11219304Speter 11319304Speter if (ex_screen_copy(orig, sp)) /* Ex. */ 11419304Speter goto err; 11519304Speter if (v_screen_copy(orig, sp)) /* Vi. */ 11619304Speter goto err; 117254225Speter sp->cl_private = 0; /* XXX */ 118254225Speter conv_init(orig, sp); /* XXX */ 11919304Speter 12019304Speter *spp = sp; 12119304Speter return (0); 12219304Speter 12319304Spetererr: screen_end(sp); 12419304Speter return (1); 12519304Speter} 12619304Speter 12719304Speter/* 12819304Speter * screen_end -- 12919304Speter * Release a screen, no matter what had (and had not) been 13019304Speter * initialized. 13119304Speter * 132281373Sbapt * PUBLIC: int screen_end(SCR *); 13319304Speter */ 13419304Speterint 135254225Speterscreen_end(SCR *sp) 13619304Speter{ 13719304Speter int rval; 13819304Speter 13919304Speter /* If multiply referenced, just decrement the count and return. */ 14019304Speter if (--sp->refcnt != 0) 14119304Speter return (0); 14219304Speter 14319304Speter /* 14419304Speter * Remove the screen from the displayed queue. 14519304Speter * 14619304Speter * If a created screen failed during initialization, it may not 14719304Speter * be linked into the chain. 14819304Speter */ 149254225Speter if (TAILQ_ENTRY_ISVALID(sp, q)) 150254225Speter TAILQ_REMOVE(sp->gp->dq, sp, q); 15119304Speter 15219304Speter /* The screen is no longer real. */ 15319304Speter F_CLR(sp, SC_SCR_EX | SC_SCR_VI); 15419304Speter 15519304Speter rval = 0; 15619304Speter if (v_screen_end(sp)) /* End vi. */ 15719304Speter rval = 1; 15819304Speter if (ex_screen_end(sp)) /* End ex. */ 15919304Speter rval = 1; 16019304Speter 16119304Speter /* Free file names. */ 16219304Speter { char **ap; 16319304Speter if (!F_ISSET(sp, SC_ARGNOFREE) && sp->argv != NULL) { 16419304Speter for (ap = sp->argv; *ap != NULL; ++ap) 16519304Speter free(*ap); 16619304Speter free(sp->argv); 16719304Speter } 16819304Speter } 16919304Speter 17019304Speter /* Free any text input. */ 171254225Speter if (!TAILQ_EMPTY(sp->tiq)) 172254225Speter text_lfree(sp->tiq); 17319304Speter 17419304Speter /* Free alternate file name. */ 17519304Speter if (sp->alt_name != NULL) 17619304Speter free(sp->alt_name); 17719304Speter 17819304Speter /* Free up search information. */ 17919304Speter if (sp->re != NULL) 18019304Speter free(sp->re); 18119304Speter if (F_ISSET(sp, SC_RE_SEARCH)) 18219304Speter regfree(&sp->re_c); 18319304Speter if (sp->subre != NULL) 18419304Speter free(sp->subre); 18519304Speter if (F_ISSET(sp, SC_RE_SUBST)) 18619304Speter regfree(&sp->subre_c); 18719304Speter if (sp->repl != NULL) 18819304Speter free(sp->repl); 18919304Speter if (sp->newl != NULL) 19019304Speter free(sp->newl); 19119304Speter 192254225Speter /* Free the iconv environment */ 193254225Speter conv_end(sp); 194254225Speter 19519304Speter /* Free all the options */ 19619304Speter opts_free(sp); 19719304Speter 19819304Speter /* Free the screen itself. */ 19919304Speter free(sp); 20019304Speter 20119304Speter return (rval); 20219304Speter} 20319304Speter 20419304Speter/* 20519304Speter * screen_next -- 20619304Speter * Return the next screen in the queue. 20719304Speter * 208281373Sbapt * PUBLIC: SCR *screen_next(SCR *); 20919304Speter */ 21019304SpeterSCR * 211254225Speterscreen_next(SCR *sp) 21219304Speter{ 21319304Speter GS *gp; 21419304Speter SCR *next; 21519304Speter 21619304Speter /* Try the display queue, without returning the current screen. */ 21719304Speter gp = sp->gp; 218254225Speter TAILQ_FOREACH(next, gp->dq, q) 21919304Speter if (next != sp) 22019304Speter break; 221254225Speter if (next != NULL) 22219304Speter return (next); 22319304Speter 22419304Speter /* Try the hidden queue; if found, move screen to the display queue. */ 225254225Speter if (!TAILQ_EMPTY(gp->hq)) { 226254225Speter next = TAILQ_FIRST(gp->hq); 227254225Speter TAILQ_REMOVE(gp->hq, next, q); 228254225Speter TAILQ_INSERT_HEAD(gp->dq, next, q); 22919304Speter return (next); 23019304Speter } 23119304Speter return (NULL); 23219304Speter} 233