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 8.51 1994/01/11 22:36:23 bostic Exp $ (Berkeley) $Date: 1994/01/11 22:36:23 $";
  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         *spp = NULL;
  37         CALLOC_RET(orig, sp, SCR *, 1, sizeof(SCR));
  38         *spp = sp;
  39
  40 /* INITIALIZED AT SCREEN CREATE. */
  41         sp->gp = __global_list;                 /* All ref the GS structure. */
  42
  43         LIST_INIT(&sp->msgq);
  44         CIRCLEQ_INIT(&sp->frefq);
  45
  46         sp->ccnt = 2;                           /* Anything > 1 */
  47
  48         FD_ZERO(&sp->rdfd);
  49
  50         CIRCLEQ_INIT(&sp->tiq);
  51
  52 /* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */
  53         if (orig == NULL) {
  54                 sp->searchdir = NOTSET;
  55                 sp->csearchdir = CNOTSET;
  56
  57                 switch (flags & S_SCREENS) {
  58                 case S_EX:
  59                         if (sex_screen_init(sp))
  60                                 return (1);
  61                         break;
  62                 case S_VI_CURSES:
  63                         if (svi_screen_init(sp))
  64                                 return (1);
  65                         break;
  66                 case S_VI_XAW:
  67                         if (xaw_screen_init(sp))
  68                                 return (1);
  69                         break;
  70                 default:
  71                         abort();
  72                 }
  73
  74                 sp->flags = flags;
  75         } else {
  76                 if (orig->alt_name != NULL &&
  77                     (sp->alt_name = strdup(orig->alt_name)) == NULL)
  78                         goto mem;
  79
  80                 /* Retain all searching/substitution information. */
  81                 if (F_ISSET(orig, S_SRE_SET)) {
  82                         F_SET(sp, S_SRE_SET);
  83                         sp->sre = orig->sre;
  84                 }
  85                 if (F_ISSET(orig, S_SUBRE_SET)) {
  86                         F_SET(sp, S_SUBRE_SET);
  87                         sp->subre = orig->subre;
  88                 }
  89                 sp->searchdir = orig->searchdir == NOTSET ? NOTSET : FORWARD;
  90                 sp->csearchdir = CNOTSET;
  91                 sp->lastckey = orig->lastckey;
  92
  93                 if (orig->matchsize) {
  94                         len = orig->matchsize * sizeof(regmatch_t);
  95                         MALLOC(sp, sp->match, regmatch_t *, len);
  96                         if (sp->match == NULL)
  97                                 goto mem;
  98                         sp->matchsize = orig->matchsize;
  99                         memmove(sp->match, orig->match, len);
 100                 }
 101                 if (orig->repl_len) {
 102                         MALLOC(sp, sp->repl, char *, orig->repl_len);
 103                         if (sp->repl == NULL)
 104                                 goto mem;
 105                         sp->repl_len = orig->repl_len;
 106                         memmove(sp->repl, orig->repl, orig->repl_len);
 107                 }
 108                 if (orig->newl_len) {
 109                         len = orig->newl_len * sizeof(size_t);
 110                         MALLOC(sp, sp->newl, size_t *, len);
 111                         if (sp->newl == NULL)
 112                                 goto mem;
 113                         sp->newl_len = orig->newl_len;
 114                         sp->newl_cnt = orig->newl_cnt;
 115                         memmove(sp->newl, orig->newl, len);
 116                 }
 117
 118                 sp->saved_vi_mode = orig->saved_vi_mode;
 119
 120                 if (opts_copy(orig, sp)) {
 121 mem:                    msgq(orig, M_SYSERR, "new screen attributes");
 122                         (void)screen_end(sp);
 123                         return (1);
 124                 }
 125
 126                 sp->s_bell              = orig->s_bell;
 127                 sp->s_bg                = orig->s_bg;
 128                 sp->s_busy              = orig->s_busy;
 129                 sp->s_change            = orig->s_change;
 130                 sp->s_chposition        = orig->s_chposition;
 131                 sp->s_clear             = orig->s_clear;
 132                 sp->s_column            = orig->s_column;
 133                 sp->s_confirm           = orig->s_confirm;
 134                 sp->s_down              = orig->s_down;
 135                 sp->s_edit              = orig->s_edit;
 136                 sp->s_end               = orig->s_end;
 137                 sp->s_ex_cmd            = orig->s_ex_cmd;
 138                 sp->s_ex_run            = orig->s_ex_run;
 139                 sp->s_ex_write          = orig->s_ex_write;
 140                 sp->s_fg                = orig->s_fg;
 141                 sp->s_fill              = orig->s_fill;
 142                 sp->s_get               = orig->s_get;
 143                 sp->s_key_read          = orig->s_key_read;
 144                 sp->s_optchange         = orig->s_optchange;
 145                 sp->s_position          = orig->s_position;
 146                 sp->s_rabs              = orig->s_rabs;
 147                 sp->s_refresh           = orig->s_refresh;
 148                 sp->s_relative          = orig->s_relative;
 149                 sp->s_rrel              = orig->s_rrel;
 150                 sp->s_split             = orig->s_split;
 151                 sp->s_suspend           = orig->s_suspend;
 152                 sp->s_up                = orig->s_up;
 153
 154                 F_SET(sp, F_ISSET(orig, S_SCREENS));
 155         }
 156
 157         if (xaw_screen_copy(orig, sp))          /* Init S_VI_XAW screen. */
 158                 return (1);
 159         if (svi_screen_copy(orig, sp))          /* Init S_VI_CURSES screen. */
 160                 return (1);
 161         if (sex_screen_copy(orig, sp))          /* Init S_EX screen. */
 162                 return (1);
 163         if (v_screen_copy(orig, sp))            /* Init vi. */
 164                 return (1);
 165         if (ex_screen_copy(orig, sp))           /* Init ex. */
 166                 return (1);
 167
 168         *spp = sp;
 169         return (0);
 170 }
 171
 172 /*
 173  * screen_end --
 174  *      Release a screen.
 175  */
 176 int
 177 screen_end(sp)
 178         SCR *sp;
 179 {
 180         int rval;
 181
 182         rval = 0;
 183         if (xaw_screen_end(sp))                 /* End S_VI_XAW screen. */
 184                 rval = 1;
 185         if (svi_screen_end(sp))                 /* End S_VI_CURSES screen. */
 186                 rval = 1;
 187         if (sex_screen_end(sp))                 /* End S_EX screen. */
 188                 rval = 1;
 189         if (v_screen_end(sp))                   /* End vi. */
 190                 rval = 1;
 191         if (ex_screen_end(sp))                  /* End ex. */
 192                 rval = 1;
 193
 194         /* Free FREF's. */
 195         { FREF *frp;
 196                 while ((frp = sp->frefq.cqh_first) != (FREF *)&sp->frefq) {
 197                         CIRCLEQ_REMOVE(&sp->frefq, frp, q);
 198                         if (frp->cname != NULL)
 199                                 free(frp->cname);
 200                         if (frp->name != NULL)
 201                                 free(frp->name);
 202                         if (frp->tname != NULL)
 203                                 free(frp->tname);
 204                         FREE(frp, sizeof(FREF));
 205                 }
 206         }
 207
 208         /* Free any text input. */
 209         text_lfree(&sp->tiq);
 210
 211         /* Free any script information. */
 212         if (F_ISSET(sp, S_SCRIPT))
 213                 sscr_end(sp);
 214
 215         /* Free alternate file name. */
 216         if (sp->alt_name != NULL)
 217                 FREE(sp->alt_name, strlen(sp->alt_name) + 1);
 218
 219         /* Free up search information. */
 220         if (sp->match != NULL)
 221                 FREE(sp->match, sizeof(regmatch_t));
 222         if (sp->repl != NULL)
 223                 FREE(sp->repl, sp->repl_len);
 224         if (sp->newl != NULL)
 225                 FREE(sp->newl, sp->newl_len);
 226
 227         /* Free all the options */
 228         opts_free(sp);
 229
 230         /*
 231          * Free the message chain last, so previous failures have a place
 232          * to put messages.  Copy messages to (in order) a related screen,
 233          * any screen, the global area.
 234          */
 235         { SCR *c_sp; MSG *mp, *next;
 236                 if ((c_sp = sp->q.cqe_prev) != (void *)&sp->gp->dq) {
 237                         if (F_ISSET(sp, S_BELLSCHED))
 238                                 F_SET(c_sp, S_BELLSCHED);
 239                 } else if ((c_sp = sp->q.cqe_next) != (void *)&sp->gp->dq) {
 240                         if (F_ISSET(sp, S_BELLSCHED))
 241                                 F_SET(c_sp, S_BELLSCHED);
 242                 } else if ((c_sp =
 243                     sp->gp->hq.cqh_first) != (void *)&sp->gp->hq) {
 244                         if (F_ISSET(sp, S_BELLSCHED))
 245                                 F_SET(c_sp, S_BELLSCHED);
 246                 } else {
 247                         c_sp = NULL;
 248                         if (F_ISSET(sp, S_BELLSCHED))
 249                                 F_SET(sp->gp, G_BELLSCHED);
 250                 }
 251
 252                 for (mp = sp->msgq.lh_first; mp != NULL; mp = next) {
 253                         if (!F_ISSET(mp, M_EMPTY))
 254                                 msg_app(sp->gp, c_sp,
 255                                     mp->flags & M_INV_VIDEO, mp->mbuf, mp->len);
 256                         next = mp->q.le_next;
 257                         if (mp->mbuf != NULL)
 258                                 FREE(mp->mbuf, mp->blen);
 259                         FREE(mp, sizeof(MSG));
 260                 }
 261         }
 262
 263         /* Remove the screen from the displayed queue. */
 264         CIRCLEQ_REMOVE(&sp->gp->dq, sp, q);
 265
 266         /* Free the screen itself. */
 267         FREE(sp, sizeof(SCR));
 268
 269         return (rval);
 270 }