common/screen.c

   1 /*-
   2  * Copyright (c) 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * %sccs.include.redist.c%
   6  */
   7
   8 #ifndef lint
   9 static char sccsid[] = "$Id: screen.c,v 8.50 1993/12/16 14:59:01 bostic Exp $ (Berkeley) $Date: 1993/12/16 14:59:01 $";
  10 #endif /* not lint */
  11
  12 #include <sys/types.h>
  13
  14 #include <errno.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18
  19 #include "vi.h"
  20 #include "vcmd.h"
  21 #include "excmd.h"
  22 #include "tag.h"
  23
  24 /*
  25  * screen_init --
  26  *      Do the default initialization of an SCR structure.
  27  */
  28 int
  29 screen_init(orig, spp, flags)
  30         SCR *orig, **spp;
  31         u_int flags;
  32 {
  33         SCR *sp;
  34         size_t len;
  35
  36         CALLOC_RET(orig, sp, SCR *, 1, sizeof(SCR));
  37
  38 /* INITIALIZED AT SCREEN CREATE. */
  39         sp->gp = __global_list;                 /* All ref the GS structure. */
  40
  41         LIST_INIT(&sp->msgq);
  42         CIRCLEQ_INIT(&sp->frefq);
  43
  44         sp->ccnt = 2;                           /* Anything > 1 */
  45
  46         FD_ZERO(&sp->rdfd);
  47
  48         CIRCLEQ_INIT(&sp->tiq);
  49
  50 /* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */
  51         if (orig == NULL) {
  52                 sp->searchdir = NOTSET;
  53                 sp->csearchdir = CNOTSET;
  54
  55                 switch (flags & S_SCREENS) {
  56                 case S_EX:
  57                         if (sex_screen_init(sp))
  58                                 return (1);
  59                         break;
  60                 case S_VI_CURSES:
  61                         if (svi_screen_init(sp))
  62                                 return (1);
  63                         break;
  64                 case S_VI_XAW:
  65                         if (xaw_screen_init(sp))
  66                                 return (1);
  67                         break;
  68                 default:
  69                         abort();
  70                 }
  71
  72                 sp->flags = flags;
  73         } else {
  74                 if (orig->alt_name != NULL &&
  75                     (sp->alt_name = strdup(orig->alt_name)) == NULL)
  76                         goto mem;
  77
  78                 /* Retain all searching/substitution information. */
  79                 if (F_ISSET(orig, S_SRE_SET)) {
  80                         F_SET(sp, S_SRE_SET);
  81                         sp->sre = orig->sre;
  82                 }
  83                 if (F_ISSET(orig, S_SUBRE_SET)) {
  84                         F_SET(sp, S_SUBRE_SET);
  85                         sp->subre = orig->subre;
  86                 }
  87                 sp->searchdir = orig->searchdir == NOTSET ? NOTSET : FORWARD;
  88                 sp->csearchdir = CNOTSET;
  89                 sp->lastckey = orig->lastckey;
  90
  91                 if (orig->matchsize) {
  92                         len = orig->matchsize * sizeof(regmatch_t);
  93                         MALLOC(sp, sp->match, regmatch_t *, len);
  94                         if (sp->match == NULL)
  95                                 goto mem;
  96                         sp->matchsize = orig->matchsize;
  97                         memmove(sp->match, orig->match, len);
  98                 }
  99                 if (orig->repl_len) {
 100                         MALLOC(sp, sp->repl, char *, orig->repl_len);
 101                         if (sp->repl == NULL)
 102                                 goto mem;
 103                         sp->repl_len = orig->repl_len;
 104                         memmove(sp->repl, orig->repl, orig->repl_len);
 105                 }
 106                 if (orig->newl_len) {
 107                         len = orig->newl_len * sizeof(size_t);
 108                         MALLOC(sp, sp->newl, size_t *, len);
 109                         if (sp->newl == NULL)
 110                                 goto mem;
 111                         sp->newl_len = orig->newl_len;
 112                         sp->newl_cnt = orig->newl_cnt;
 113                         memmove(sp->newl, orig->newl, len);
 114                 }
 115
 116                 sp->saved_vi_mode = orig->saved_vi_mode;
 117
 118                 if (opts_copy(orig, sp)) {
 119 mem:                    msgq(orig, M_SYSERR, "new screen attributes");
 120                         (void)screen_end(sp);
 121                         return (1);
 122                 }
 123
 124                 sp->s_bell              = orig->s_bell;
 125                 sp->s_bg                = orig->s_bg;
 126                 sp->s_busy              = orig->s_busy;
 127                 sp->s_change            = orig->s_change;
 128                 sp->s_chposition        = orig->s_chposition;
 129                 sp->s_clear             = orig->s_clear;
 130                 sp->s_column            = orig->s_column;
 131                 sp->s_confirm           = orig->s_confirm;
 132                 sp->s_down              = orig->s_down;
 133                 sp->s_edit              = orig->s_edit;
 134                 sp->s_end               = orig->s_end;
 135                 sp->s_ex_cmd            = orig->s_ex_cmd;
 136                 sp->s_ex_run            = orig->s_ex_run;
 137                 sp->s_ex_write          = orig->s_ex_write;
 138                 sp->s_fg                = orig->s_fg;
 139                 sp->s_fill              = orig->s_fill;
 140                 sp->s_get               = orig->s_get;
 141                 sp->s_key_read          = orig->s_key_read;
 142                 sp->s_optchange         = orig->s_optchange;
 143                 sp->s_position          = orig->s_position;
 144                 sp->s_rabs              = orig->s_rabs;
 145                 sp->s_refresh           = orig->s_refresh;
 146                 sp->s_relative          = orig->s_relative;
 147                 sp->s_rrel              = orig->s_rrel;
 148                 sp->s_split             = orig->s_split;
 149                 sp->s_suspend           = orig->s_suspend;
 150                 sp->s_up                = orig->s_up;
 151
 152                 F_SET(sp, F_ISSET(orig, S_SCREENS));
 153         }
 154
 155         if (xaw_screen_copy(orig, sp))          /* Init S_VI_XAW screen. */
 156                 return (1);
 157         if (svi_screen_copy(orig, sp))          /* Init S_VI_CURSES screen. */
 158                 return (1);
 159         if (sex_screen_copy(orig, sp))          /* Init S_EX screen. */
 160                 return (1);
 161         if (v_screen_copy(orig, sp))            /* Init vi. */
 162                 return (1);
 163         if (ex_screen_copy(orig, sp))           /* Init ex. */
 164                 return (1);
 165
 166         *spp = sp;
 167         return (0);
 168 }
 169
 170 /*
 171  * screen_end --
 172  *      Release a screen.
 173  */
 174 int
 175 screen_end(sp)
 176         SCR *sp;
 177 {
 178         int rval;
 179
 180         rval = 0;
 181         if (xaw_screen_end(sp))                 /* End S_VI_XAW screen. */
 182                 rval = 1;
 183         if (svi_screen_end(sp))                 /* End S_VI_CURSES screen. */
 184                 rval = 1;
 185         if (sex_screen_end(sp))                 /* End S_EX screen. */
 186                 rval = 1;
 187         if (v_screen_end(sp))                   /* End vi. */
 188                 rval = 1;
 189         if (ex_screen_end(sp))                  /* End ex. */
 190                 rval = 1;
 191
 192         /* Free FREF's. */
 193         { FREF *frp;
 194                 while ((frp = sp->frefq.cqh_first) != (FREF *)&sp->frefq) {
 195                         CIRCLEQ_REMOVE(&sp->frefq, frp, q);
 196                         if (frp->cname != NULL)
 197                                 free(frp->cname);
 198                         if (frp->name != NULL)
 199                                 free(frp->name);
 200                         if (frp->tname != NULL)
 201                                 free(frp->tname);
 202                         FREE(frp, sizeof(FREF));
 203                 }
 204         }
 205
 206         /* Free any text input. */
 207         text_lfree(&sp->tiq);
 208
 209         /* Free any script information. */
 210         if (F_ISSET(sp, S_SCRIPT))
 211                 sscr_end(sp);
 212
 213         /* Free alternate file name. */
 214         if (sp->alt_name != NULL)
 215                 FREE(sp->alt_name, strlen(sp->alt_name) + 1);
 216
 217         /* Free up search information. */
 218         if (sp->match != NULL)
 219                 FREE(sp->match, sizeof(regmatch_t));
 220         if (sp->repl != NULL)
 221                 FREE(sp->repl, sp->repl_len);
 222         if (sp->newl != NULL)
 223                 FREE(sp->newl, sp->newl_len);
 224
 225         /* Free all the options */
 226         opts_free(sp);
 227
 228         /*
 229          * Free the message chain last, so previous failures have a place
 230          * to put messages.  Copy messages to (in order) a related screen,
 231          * any screen, the global area.
 232          */
 233         { SCR *c_sp; MSG *mp, *next;
 234                 if ((c_sp = sp->q.cqe_prev) != (void *)&sp->gp->dq) {
 235                         if (F_ISSET(sp, S_BELLSCHED))
 236                                 F_SET(c_sp, S_BELLSCHED);
 237                 } else if ((c_sp = sp->q.cqe_next) != (void *)&sp->gp->dq) {
 238                         if (F_ISSET(sp, S_BELLSCHED))
 239                                 F_SET(c_sp, S_BELLSCHED);
 240                 } else if ((c_sp =
 241                     sp->gp->hq.cqh_first) != (void *)&sp->gp->hq) {
 242                         if (F_ISSET(sp, S_BELLSCHED))
 243                                 F_SET(c_sp, S_BELLSCHED);
 244                 } else {
 245                         c_sp = NULL;
 246                         if (F_ISSET(sp, S_BELLSCHED))
 247                                 F_SET(sp->gp, G_BELLSCHED);
 248                 }
 249
 250                 for (mp = sp->msgq.lh_first; mp != NULL; mp = next) {
 251                         if (!F_ISSET(mp, M_EMPTY))
 252                                 msg_app(sp->gp, c_sp,
 253                                     mp->flags & M_INV_VIDEO, mp->mbuf, mp->len);
 254                         next = mp->q.le_next;
 255                         if (mp->mbuf != NULL)
 256                                 FREE(mp->mbuf, mp->blen);
 257                         FREE(mp, sizeof(MSG));
 258                 }
 259         }
 260
 261         /* Remove the screen from the displayed queue. */
 262         CIRCLEQ_REMOVE(&sp->gp->dq, sp, q);
 263
 264         /* Free the screen itself. */
 265         FREE(sp, sizeof(SCR));
 266
 267         return (rval);
 268 }