lib/libdpv/dprompt.c

   1 /*-
   2  * Copyright (c) 2013-2014 Devin Teske <dteske@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/types.h>
  31
  32 #define _BSD_SOURCE /* to get dprintf() prototype in stdio.h below */
  33 #include <dialog.h>
  34 #include <err.h>
  35 #include <libutil.h>
  36 #include <stdarg.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <string_m.h>
  41 #include <unistd.h>
  42
  43 #include "dialog_util.h"
  44 #include "dialogrc.h"
  45 #include "dprompt.h"
  46 #include "dpv.h"
  47 #include "dpv_private.h"
  48
  49 #define FLABEL_MAX 1024
  50
  51 static int fheight = 0; /* initialized by dprompt_init() */
  52 static char dprompt[PROMPT_MAX + 1] = "";
  53 static char *dprompt_pos = (char *)(0); /* treated numerically */
  54
  55 /* Display characteristics */
  56 #define FM_DONE 0x01
  57 #define FM_FAIL 0x02
  58 #define FM_PEND 0x04
  59 static uint8_t dprompt_free_mask;
  60 static char *done = NULL;
  61 static char *fail = NULL;
  62 static char *pend = NULL;
  63 int display_limit = DISPLAY_LIMIT_DEFAULT;      /* Max entries to show */
  64 int label_size    = LABEL_SIZE_DEFAULT;         /* Max width for labels */
  65 int pbar_size     = PBAR_SIZE_DEFAULT;          /* Mini-progressbar size */
  66 static int gauge_percent = 0;
  67 static int done_size, done_lsize, done_rsize;
  68 static int fail_size, fail_lsize, fail_rsize;
  69 static int mesg_size, mesg_lsize, mesg_rsize;
  70 static int pend_size, pend_lsize, pend_rsize;
  71 static int pct_lsize, pct_rsize;
  72 static void *gauge = NULL;
  73 #define SPIN_SIZE 4
  74 static char spin[SPIN_SIZE + 1] = "/-\\|";
  75 static char msg[PROMPT_MAX + 1];
  76 static char *spin_cp = spin;
  77
  78 /* Function prototypes */
  79 static char     spin_char(void);
  80 static int      dprompt_add_files(struct dpv_file_node *file_list,
  81                     struct dpv_file_node *curfile, int pct);
  82
  83 /*
  84  * Returns a pointer to the current spin character in the spin string and
  85  * advances the global position to the next character for the next call.
  86  */
  87 static char
  88 spin_char(void)
  89 {
  90         char ch;
  91
  92         if (spin_cp == '\0')
  93                 spin_cp = spin;
  94         ch = *spin_cp;
  95
  96         /* Advance the spinner to the next char */
  97         if (++spin_cp >= (spin + SPIN_SIZE))
  98                 spin_cp = spin;
  99
 100         return (ch);
 101 }
 102
 103 /*
 104  * Initialize heights and widths based on various strings and environment
 105  * variables (such as ENV_USE_COLOR).
 106  */
 107 void
 108 dprompt_init(struct dpv_file_node *file_list)
 109 {
 110         uint8_t nls = 0;
 111         int len;
 112         int max_cols;
 113         int max_rows;
 114         int nthfile;
 115         int numlines;
 116         struct dpv_file_node *curfile;
 117
 118         /*
 119          * Initialize dialog(3) `colors' support and draw backtitle
 120          */
 121         if (use_libdialog && !debug) {
 122                 init_dialog(stdin, stdout);
 123                 dialog_vars.colors = 1;
 124                 if (backtitle != NULL) {
 125                         dialog_vars.backtitle = (char *)backtitle;
 126                         dlg_put_backtitle();
 127                 }
 128         }
 129
 130         /* Calculate width of dialog(3) or [X]dialog(1) --gauge box */
 131         dwidth = label_size + pbar_size + 9;
 132
 133         /*
 134          * Calculate height of dialog(3) or [X]dialog(1) --gauge box
 135          */
 136         dheight = 5;
 137         max_rows = dialog_maxrows();
 138         /* adjust max_rows for backtitle and/or dialog(3) statusLine */
 139         if (backtitle != NULL)
 140                 max_rows -= use_shadow ? 3 : 2;
 141         if (use_libdialog && use_shadow)
 142                 max_rows -= 2;
 143         /* add lines for `-p text' */
 144         numlines = dialog_prompt_numlines(pprompt, 0);
 145         if (debug)
 146                 warnx("`-p text' is %i line%s long", numlines,
 147                     numlines == 1 ? "" : "s");
 148         dheight += numlines;
 149         /* adjust dheight for various implementations */
 150         if (use_dialog) {
 151                 dheight -= dialog_prompt_nlstate(pprompt);
 152                 nls = dialog_prompt_nlstate(pprompt);
 153         } else if (use_xdialog) {
 154                 if (pprompt == NULL || *pprompt == '\0')
 155                         dheight++;
 156         } else if (use_libdialog) {
 157                 if (pprompt != NULL && *pprompt != '\0')
 158                         dheight--;
 159         }
 160         /* limit the number of display items (necessary per dialog(1,3)) */
 161         if (display_limit == 0 || display_limit > DPV_DISPLAY_LIMIT)
 162                 display_limit = DPV_DISPLAY_LIMIT;
 163         /* verify fheight will fit (stop if we hit 1) */
 164         for (; display_limit > 0; display_limit--) {
 165                 nthfile = numlines = 0;
 166                 fheight = (int)dpv_nfiles > display_limit ?
 167                     (unsigned int)display_limit : dpv_nfiles;
 168                 for (curfile = file_list; curfile != NULL;
 169                     curfile = curfile->next) {
 170                         nthfile++;
 171                         numlines += dialog_prompt_numlines(curfile->name, nls);
 172                         if ((nthfile % display_limit) == 0) {
 173                                 if (numlines > fheight)
 174                                         fheight = numlines;
 175                                 numlines = nthfile = 0;
 176                         }
 177                 }
 178                 if (numlines > fheight)
 179                         fheight = numlines;
 180                 if ((dheight + fheight +
 181                     (int)dialog_prompt_numlines(aprompt, use_dialog) -
 182                     (use_dialog ? (int)dialog_prompt_nlstate(aprompt) : 0))
 183                     <= max_rows)
 184                         break;
 185         }
 186         /* don't show any items if we run the risk of hitting a blank set */
 187         if ((max_rows - (use_shadow ? 5 : 4)) >= fheight)
 188                 dheight += fheight;
 189         else
 190                 fheight = 0;
 191         /* add lines for `-a text' */
 192         numlines = dialog_prompt_numlines(aprompt, use_dialog);
 193         if (debug)
 194                 warnx("`-a text' is %i line%s long", numlines,
 195                     numlines == 1 ? "" : "s");
 196         dheight += numlines;
 197
 198         /* If using Xdialog(1), adjust accordingly (based on testing) */
 199         if (use_xdialog)
 200                 dheight += dheight / 4;
 201
 202         /* For wide mode, long prefix (`pprompt') or append (`aprompt')
 203          * strings will bump width */
 204         if (wide) {
 205                 len = (int)dialog_prompt_longestline(pprompt, 0); /* !nls */
 206                 if ((len + 4) > dwidth)
 207                         dwidth = len + 4;
 208                 len = (int)dialog_prompt_longestline(aprompt, 1); /* nls */
 209                 if ((len + 4) > dwidth)
 210                         dwidth = len + 4;
 211         }
 212
 213         /* Enforce width constraints to maximum values */
 214         max_cols = dialog_maxcols();
 215         if (max_cols > 0 && dwidth > max_cols)
 216                 dwidth = max_cols;
 217
 218         /* Optimize widths to sane values*/
 219         if (pbar_size > dwidth - 9) {
 220                 pbar_size = dwidth - 9;
 221                 label_size = 0;
 222                 /* -9 = "|  - [" ... "] |" */
 223         }
 224         if (pbar_size < 0)
 225                 label_size = dwidth - 8;
 226                 /* -8 = "|  " ... " -  |" */
 227         else if (label_size > (dwidth - pbar_size - 9) || wide)
 228                 label_size = no_labels ? 0 : dwidth - pbar_size - 9;
 229                 /* -9 = "| " ... " - [" ... "] |" */
 230
 231         /* Hide labels if requested */
 232         if (no_labels)
 233                 label_size = 0;
 234
 235         /* Touch up the height (now that we know dwidth) */
 236         dheight += dialog_prompt_wrappedlines(pprompt, dwidth - 4, 0);
 237         dheight += dialog_prompt_wrappedlines(aprompt, dwidth - 4, 1);
 238
 239         if (debug)
 240                 warnx("dheight = %i dwidth = %i fheight = %i",
 241                     dheight, dwidth, fheight);
 242
 243         /* Calculate left/right portions of % */
 244         pct_lsize = (pbar_size - 4) / 2; /* -4 == printf("%-3s%%", pct) */
 245         pct_rsize = pct_lsize;
 246         /* If not evenly divisible by 2, increment the right-side */
 247         if ((pct_rsize + pct_rsize + 4) != pbar_size)
 248                 pct_rsize++;
 249
 250         /* Initialize "Done" text */
 251         if (done == NULL && (done = msg_done) == NULL) {
 252                 if ((done = getenv(ENV_MSG_DONE)) != NULL)
 253                         done_size = strlen(done);
 254                 else {
 255                         done_size = strlen(DPV_DONE_DEFAULT);
 256                         if ((done = malloc(done_size + 1)) == NULL)
 257                                 errx(EXIT_FAILURE, "Out of memory?!");
 258                         dprompt_free_mask |= FM_DONE;
 259                         snprintf(done, done_size + 1, DPV_DONE_DEFAULT);
 260                 }
 261         }
 262         if (pbar_size < done_size) {
 263                 done_lsize = done_rsize = 0;
 264                 *(done + pbar_size) = '\0';
 265                 done_size = pbar_size;
 266         } else {
 267                 /* Calculate left/right portions for mini-progressbar */
 268                 done_lsize = (pbar_size - done_size) / 2;
 269                 done_rsize = done_lsize;
 270                 /* If not evenly divisible by 2, increment the right-side */
 271                 if ((done_rsize + done_size + done_lsize) != pbar_size)
 272                         done_rsize++;
 273         }
 274
 275         /* Initialize "Fail" text */
 276         if (fail == NULL && (fail = msg_fail) == NULL) {
 277                 if ((fail = getenv(ENV_MSG_FAIL)) != NULL)
 278                         fail_size = strlen(fail);
 279                 else {
 280                         fail_size = strlen(DPV_FAIL_DEFAULT);
 281                         if ((fail = malloc(fail_size + 1)) == NULL)
 282                                 errx(EXIT_FAILURE, "Out of memory?!");
 283                         dprompt_free_mask |= FM_FAIL;
 284                         snprintf(fail, fail_size + 1, DPV_FAIL_DEFAULT);
 285                 }
 286         }
 287         if (pbar_size < fail_size) {
 288                 fail_lsize = fail_rsize = 0;
 289                 *(fail + pbar_size) = '\0';
 290                 fail_size = pbar_size;
 291         } else {
 292                 /* Calculate left/right portions for mini-progressbar */
 293                 fail_lsize = (pbar_size - fail_size) / 2;
 294                 fail_rsize = fail_lsize;
 295                 /* If not evenly divisible by 2, increment the right-side */
 296                 if ((fail_rsize + fail_size + fail_lsize) != pbar_size)
 297                         fail_rsize++;
 298         }
 299
 300         /* Initialize "Pending" text */
 301         if (pend == NULL && (pend = msg_pending) == NULL) {
 302                 if ((pend = getenv(ENV_MSG_PENDING)) != NULL)
 303                         pend_size = strlen(pend);
 304                 else {
 305                         pend_size = strlen(DPV_PENDING_DEFAULT);
 306                         if ((pend = malloc(pend_size + 1)) == NULL)
 307                                 errx(EXIT_FAILURE, "Out of memory?!");
 308                         dprompt_free_mask |= FM_PEND;
 309                         snprintf(pend, pend_size + 1, DPV_PENDING_DEFAULT);
 310                 }
 311         }
 312         if (pbar_size < pend_size) {
 313                 pend_lsize = pend_rsize = 0;
 314                 *(pend + pbar_size) = '\0';
 315                 pend_size = pbar_size;
 316         } else {
 317                 /* Calculate left/right portions for mini-progressbar */
 318                 pend_lsize = (pbar_size - pend_size) / 2;
 319                 pend_rsize = pend_lsize;
 320                 /* If not evenly divisible by 2, increment the right-side */
 321                 if ((pend_rsize + pend_lsize + pend_size) != pbar_size)
 322                         pend_rsize++;
 323         }
 324
 325         if (debug)
 326                 warnx("label_size = %i pbar_size = %i", label_size, pbar_size);
 327
 328         dprompt_clear();
 329 }
 330
 331 /*
 332  * Clear the [X]dialog(1) `--gauge' prompt buffer.
 333  */
 334 void
 335 dprompt_clear(void)
 336 {
 337
 338         *dprompt = '\0';
 339         dprompt_pos = dprompt;
 340 }
 341
 342 /*
 343  * Append to the [X]dialog(1) `--gauge' prompt buffer. Syntax is like printf(3)
 344  * and returns the number of bytes appended to the buffer.
 345  */
 346 int
 347 dprompt_add(const char *format, ...)
 348 {
 349         int len;
 350         va_list ap;
 351
 352         if (dprompt_pos >= (dprompt + PROMPT_MAX))
 353                 return (0);
 354
 355         va_start(ap, format);
 356         len = vsnprintf(dprompt_pos, (size_t)(PROMPT_MAX -
 357             (dprompt_pos - dprompt)), format, ap);
 358         va_end(ap);
 359         if (len == -1)
 360                 errx(EXIT_FAILURE, "%s: Oops, dprompt buffer overflow",
 361                     __func__);
 362
 363         if ((dprompt_pos + len) < (dprompt + PROMPT_MAX))
 364                 dprompt_pos += len;
 365         else
 366                 dprompt_pos = dprompt + PROMPT_MAX;
 367
 368         return (len);
 369 }
 370
 371 /*
 372  * Append active files to the [X]dialog(1) `--gauge' prompt buffer. Syntax
 373  * requires a pointer to the head of the dpv_file_node linked-list. Returns the
 374  * number of files processed successfully.
 375  */
 376 static int
 377 dprompt_add_files(struct dpv_file_node *file_list,
 378     struct dpv_file_node *curfile, int pct)
 379 {
 380         char c;
 381         char bold_code = 'b'; /* default: enabled */
 382         char color_code = '4'; /* default: blue */
 383         uint8_t after_curfile = curfile != NULL ? FALSE : TRUE;
 384         uint8_t nls = 0;
 385         char *cp;
 386         char *lastline;
 387         char *name;
 388         const char *bg_code;
 389         const char *estext;
 390         const char *format;
 391         enum dprompt_state dstate;
 392         int estext_lsize;
 393         int estext_rsize;
 394         int flabel_size;
 395         int hlen;
 396         int lsize;
 397         int nlines = 0;
 398         int nthfile = 0;
 399         int pwidth;
 400         int rsize;
 401         struct dpv_file_node *fp;
 402         char flabel[FLABEL_MAX + 1];
 403         char human[32];
 404         char pbar[pbar_size + 16]; /* +15 for optional color */
 405         char pbar_cap[sizeof(pbar)];
 406         char pbar_fill[sizeof(pbar)];
 407
 408
 409         /* Override color defaults with that of main progress bar */
 410         if (use_colors || use_shadow) { /* NB: shadow enables color */
 411                 color_code = gauge_color[0];
 412                 /* NB: str[1] aka bg is unused */
 413                 bold_code = gauge_color[2];
 414         }
 415
 416         /*
 417          * Create mini-progressbar for current file (if applicable)
 418          */
 419         *pbar = '\0';
 420         if (pbar_size >= 0 && pct >= 0 && curfile != NULL &&
 421             (curfile->length >= 0 || dialog_test)) {
 422                 snprintf(pbar, pbar_size + 1, "%*s%3u%%%*s", pct_lsize, "",
 423                     pct, pct_rsize, "");
 424                 if (use_color) {
 425                         /* Calculate the fill-width of progressbar */
 426                         pwidth = pct * pbar_size / 100;
 427                         /* Round up based on one-tenth of a percent */
 428                         if ((pct * pbar_size % 100) > 50)
 429                                 pwidth++;
 430
 431                         /*
 432                          * Make two copies of pbar. Make one represent the fill
 433                          * and the other the remainder (cap). We'll insert the
 434                          * ANSI delimiter in between.
 435                          */
 436                         *pbar_fill = '\0';
 437                         *pbar_cap = '\0';
 438                         strncat(pbar_fill, (const char *)(pbar), dwidth);
 439                         *(pbar_fill + pwidth) = '\0';
 440                         strncat(pbar_cap, (const char *)(pbar+pwidth), dwidth);
 441
 442                         /* Finalize the mini [color] progressbar */
 443                         snprintf(pbar, sizeof(pbar),
 444                             "\\Z%c\\Zr\\Z%c%s%s%s\\Zn", bold_code, color_code,
 445                             pbar_fill, "\\ZR", pbar_cap);
 446                 }
 447         }
 448
 449         for (fp = file_list; fp != NULL; fp = fp->next) {
 450                 flabel_size = label_size;
 451                 name = fp->name;
 452                 nthfile++;
 453
 454                 /*
 455                  * Support multiline filenames (where the filename is taken as
 456                  * the last line and the text leading up to the last line can
 457                  * be used as (for example) a heading/separator between files.
 458                  */
 459                 if (use_dialog)
 460                         nls = dialog_prompt_nlstate(pprompt);
 461                 nlines += dialog_prompt_numlines(name, nls);
 462                 lastline = dialog_prompt_lastline(name, 1);
 463                 if (name != lastline) {
 464                         c = *lastline;
 465                         *lastline = '\0';
 466                         dprompt_add("%s", name);
 467                         *lastline = c;
 468                         name = lastline;
 469                 }
 470
 471                 /* Support color codes (for dialog(1,3)) in file names */
 472                 if ((use_dialog || use_libdialog) && use_color) {
 473                         cp = name;
 474                         while (*cp != '\0') {
 475                                 if (*cp == '\\' && *(cp + 1) != '\0' &&
 476                                     *(++cp) == 'Z' && *(cp + 1) != '\0') {
 477                                         cp++;
 478                                         flabel_size += 3;
 479                                 }
 480                                 cp++;
 481                         }
 482                         if (flabel_size > FLABEL_MAX)
 483                                 flabel_size = FLABEL_MAX;
 484                 }
 485
 486                 /* If no mini-progressbar, increase label width */
 487                 if (pbar_size < 0 && flabel_size <= FLABEL_MAX - 2 &&
 488                     no_labels == FALSE)
 489                         flabel_size += 2;
 490
 491                 /* If name is too long, add an ellipsis */
 492                 if (snprintf(flabel, flabel_size + 1, "%s", name) >
 493                     flabel_size) sprintf(flabel + flabel_size - 3, "...");
 494
 495                 /*
 496                  * Append the label (processing the current file differently)
 497                  */
 498                 if (fp == curfile && pct < 100) {
 499                         /*
 500                          * Add an ellipsis to current file name if it will fit.
 501                          * There may be an ellipsis already from truncating the
 502                          * label (in which case, we already have one).
 503                          */
 504                         cp = flabel + strlen(flabel);
 505                         if (cp < (flabel + flabel_size))
 506                                 snprintf(cp, flabel_size -
 507                                     (cp - flabel) + 1, "...");
 508
 509                         /* Append label (with spinner and optional color) */
 510                         dprompt_add("%s%-*s%s %c", use_color ? "\\Zb" : "",
 511                             flabel_size, flabel, use_color ? "\\Zn" : "",
 512                             spin_char());
 513                 } else
 514                         dprompt_add("%-*s%s %s", flabel_size,
 515                             flabel, use_color ? "\\Zn" : "", " ");
 516
 517                 /*
 518                  * Append pbar/status (processing the current file differently)
 519                  */
 520                 dstate = DPROMPT_NONE;
 521                 if (fp->msg != NULL)
 522                         dstate = DPROMPT_CUSTOM_MSG;
 523                 else if (pbar_size < 0)
 524                         dstate = DPROMPT_NONE;
 525                 else if (pbar_size < 4)
 526                         dstate = DPROMPT_MINIMAL;
 527                 else if (after_curfile)
 528                         dstate = DPROMPT_PENDING;
 529                 else if (fp == curfile) {
 530                         if (*pbar == '\0') {
 531                                 if (fp->length < 0)
 532                                         dstate = DPROMPT_DETAILS;
 533                                 else if (fp->status == DPV_STATUS_RUNNING)
 534                                         dstate = DPROMPT_DETAILS;
 535                                 else
 536                                         dstate = DPROMPT_END_STATE;
 537                         }
 538                         else if (dialog_test) /* status/length ignored */
 539                                 dstate = pct < 100 ?
 540                                     DPROMPT_PBAR : DPROMPT_END_STATE;
 541                         else if (fp->status == DPV_STATUS_RUNNING)
 542                                 dstate = fp->length < 0 ?
 543                                     DPROMPT_DETAILS : DPROMPT_PBAR;
 544                         else /* not running */
 545                                 dstate = fp->length < 0 ?
 546                                     DPROMPT_DETAILS : DPROMPT_END_STATE;
 547                 } else { /* before curfile */
 548                         if (dialog_test)
 549                                 dstate = DPROMPT_END_STATE;
 550                         else
 551                                 dstate = fp->length < 0 ?
 552                                     DPROMPT_DETAILS : DPROMPT_END_STATE;
 553                 }
 554                 format = use_color ?
 555                     " [\\Z%c%s%-*s%s%-*s\\Zn]\\n" :
 556                     " [%-*s%s%-*s]\\n";
 557                 if (fp->status == DPV_STATUS_FAILED) {
 558                         bg_code = "\\Zr\\Z1"; /* Red */
 559                         estext_lsize = fail_lsize;
 560                         estext_rsize = fail_rsize;
 561                         estext = fail;
 562                 } else { /* e.g., DPV_STATUS_DONE */
 563                         bg_code = "\\Zr\\Z2"; /* Green */
 564                         estext_lsize = done_lsize;
 565                         estext_rsize = done_rsize;
 566                         estext = done;
 567                 }
 568                 switch (dstate) {
 569                 case DPROMPT_PENDING: /* Future file(s) */
 570                         dprompt_add(" [%-*s%s%-*s]\\n",
 571                             pend_lsize, "", pend, pend_rsize, "");
 572                         break;
 573                 case DPROMPT_PBAR: /* Current file */
 574                         dprompt_add(" [%s]\\n", pbar);
 575                         break;
 576                 case DPROMPT_END_STATE: /* Past/Current file(s) */
 577                         if (use_color)
 578                                 dprompt_add(format, bold_code, bg_code,
 579                                     estext_lsize, "", estext,
 580                                     estext_rsize, "");
 581                         else
 582                                 dprompt_add(format,
 583                                     estext_lsize, "", estext,
 584                                     estext_rsize, "");
 585                         break;
 586                 case DPROMPT_DETAILS: /* Past/Current file(s) */
 587                         humanize_number(human, pbar_size + 2, fp->read, "",
 588                             HN_AUTOSCALE, HN_NOSPACE | HN_DIVISOR_1000);
 589
 590                         /* Calculate center alignment */
 591                         hlen = (int)strlen(human);
 592                         lsize = (pbar_size - hlen) / 2;
 593                         rsize = lsize;
 594                         if ((lsize+hlen+rsize) != pbar_size)
 595                                 rsize++;
 596
 597                         if (use_color)
 598                                 dprompt_add(format, bold_code, bg_code,
 599                                     lsize, "", human, rsize, "");
 600                         else
 601                                 dprompt_add(format,
 602                                     lsize, "", human, rsize, "");
 603                         break;
 604                 case DPROMPT_CUSTOM_MSG: /* File-specific message override */
 605                         snprintf(msg, PROMPT_MAX + 1, "%s", fp->msg);
 606                         if (pbar_size < (mesg_size = strlen(msg))) {
 607                                 mesg_lsize = mesg_rsize = 0;
 608                                 *(msg + pbar_size) = '\0';
 609                                 mesg_size = pbar_size;
 610                         } else {
 611                                 mesg_lsize = (pbar_size - mesg_size) / 2;
 612                                 mesg_rsize = mesg_lsize;
 613                                 if ((mesg_rsize + mesg_size + mesg_lsize)
 614                                     != pbar_size)
 615                                         mesg_rsize++;
 616                         }
 617                         if (use_color)
 618                                 dprompt_add(format, bold_code, bg_code,
 619                                     mesg_lsize, "", msg, mesg_rsize, "");
 620                         else
 621                                 dprompt_add(format, mesg_lsize, "", msg,
 622                                     mesg_rsize, "");
 623                         break;
 624                 case DPROMPT_MINIMAL: /* Short progress bar, minimal room */
 625                         if (use_color)
 626                                 dprompt_add(format, bold_code, bg_code,
 627                                     pbar_size, "", "", 0, "");
 628                         else
 629                                 dprompt_add(format, pbar_size, "", "", 0, "");
 630                         break;
 631                 case DPROMPT_NONE: /* pbar_size < 0 */
 632                         /* FALLTHROUGH */
 633                 default:
 634                         dprompt_add(" \\n");
 635                         /*
 636                          * NB: Leading space required for the case when
 637                          * spin_char() returns a single backslash [\] which
 638                          * without the space, changes the meaning of `\n'
 639                          */
 640                 }
 641
 642                 /* Stop building if we've hit the internal limit */
 643                 if (nthfile >= display_limit)
 644                         break;
 645
 646                 /* If this is the current file, all others are pending */
 647                 if (fp == curfile)
 648                         after_curfile = TRUE;
 649         }
 650
 651         /*
 652          * Since we cannot change the height/width of the [X]dialog(1) widget
 653          * after spawn, to make things look nice let's pad the height so that
 654          * the `-a text' always appears in the same spot.
 655          *
 656          * NOTE: fheight is calculated in dprompt_init(). It represents the
 657          * maximum height required to display the set of items (broken up into
 658          * pieces of display_limit chunks) whose names contain the most
 659          * newlines for any given set.
 660          */
 661         while (nlines < fheight) {
 662                 dprompt_add("\n");
 663                 nlines++;
 664         }
 665
 666         return (nthfile);
 667 }
 668
 669 /*
 670  * Process the dpv_file_node linked-list of named files, re-generating the
 671  * [X]dialog(1) `--gauge' prompt text for the current state of transfers.
 672  */
 673 void
 674 dprompt_recreate(struct dpv_file_node *file_list,
 675     struct dpv_file_node *curfile, int pct)
 676 {
 677         size_t len;
 678
 679         /*
 680          * Re-Build the prompt text
 681          */
 682         dprompt_clear();
 683         if (display_limit > 0)
 684                 dprompt_add_files(file_list, curfile, pct);
 685
 686         /* Xdialog(1) requires newlines (a) escaped and (b) in triplicate */
 687         if (use_xdialog) {
 688                 /* Replace `\n' with `\n\\n\n' in dprompt */
 689                 len = strlen(dprompt);
 690                 len += strcount(dprompt, "\\n") * 5; /* +5 chars per count */
 691                 if (len > PROMPT_MAX)
 692                         errx(EXIT_FAILURE, "%s: Oops, dprompt buffer overflow "
 693                             "(%zu > %i)", __func__, len, PROMPT_MAX);
 694                 if (replaceall(dprompt, "\\n", "\n\\n\n") < 0)
 695                         err(EXIT_FAILURE, "%s: replaceall()", __func__);
 696         }
 697         else if (use_libdialog)
 698                 strexpandnl(dprompt);
 699 }
 700
 701 /*
 702  * Print the [X]dialog(1) `--gauge' prompt text to a buffer.
 703  */
 704 int
 705 dprompt_sprint(char * restrict str, const char *prefix, const char *append)
 706 {
 707
 708         return (snprintf(str, PROMPT_MAX, "%s%s%s%s", use_color ? "\\Zn" : "",
 709             prefix ? prefix : "", dprompt, append ? append : ""));
 710 }
 711
 712 /*
 713  * Print the [X]dialog(1) `--gauge' prompt text to file descriptor fd (could
 714  * be STDOUT_FILENO or a pipe(2) file descriptor to actual [X]dialog(1)).
 715  */
 716 void
 717 dprompt_dprint(int fd, const char *prefix, const char *append, int overall)
 718 {
 719         int percent = gauge_percent;
 720
 721         if (overall >= 0 && overall <= 100)
 722                 gauge_percent = percent = overall;
 723         dprintf(fd, "XXX\n%s%s%s%s\nXXX\n%i\n", use_color ? "\\Zn" : "",
 724             prefix ? prefix : "", dprompt, append ? append : "", percent);
 725         fsync(fd);
 726 }
 727
 728 /*
 729  * Print the dialog(3) `gauge' prompt text using libdialog.
 730  */
 731 void
 732 dprompt_libprint(const char *prefix, const char *append, int overall)
 733 {
 734         int percent = gauge_percent;
 735         char buf[DPV_PPROMPT_MAX + DPV_APROMPT_MAX + DPV_DISPLAY_LIMIT * 1024];
 736
 737         dprompt_sprint(buf, prefix, append);
 738
 739         if (overall >= 0 && overall <= 100)
 740                 gauge_percent = percent = overall;
 741         gauge = dlg_reallocate_gauge(gauge, title == NULL ? "" : title,
 742             buf, dheight, dwidth, percent);
 743         dlg_update_gauge(gauge, percent);
 744 }
 745
 746 /*
 747  * Free allocated items initialized by dprompt_init()
 748  */
 749 void
 750 dprompt_free(void)
 751 {
 752         if ((dprompt_free_mask & FM_DONE) != 0) {
 753                 dprompt_free_mask ^= FM_DONE;
 754                 free(done);
 755                 done = NULL;
 756         }
 757         if ((dprompt_free_mask & FM_FAIL) != 0) {
 758                 dprompt_free_mask ^= FM_FAIL;
 759                 free(fail);
 760                 fail = NULL;
 761         }
 762         if ((dprompt_free_mask & FM_PEND) != 0) {
 763                 dprompt_free_mask ^= FM_PEND;
 764                 free(pend);
 765                 pend = NULL;
 766         }
 767 }