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Annotation of mandoc/html.c, Revision 1.272

1.272   ! schwarze    1: /* $Id: html.c,v 1.271 2020/10/16 17:22:43 schwarze Exp $ */
1.1       kristaps    2: /*
1.264     schwarze    3:  * Copyright (c) 2011-2015, 2017-2020 Ingo Schwarze <schwarze@openbsd.org>
1.176     schwarze    4:  * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.29      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.186     schwarze   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.29      kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.186     schwarze   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.29      kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.264     schwarze   17:  *
                     18:  * Common functions for mandoc(1) HTML formatters.
                     19:  * For use by individual formatters and by the main program.
1.1       kristaps   20:  */
1.92      kristaps   21: #include "config.h"
                     22:
1.41      kristaps   23: #include <sys/types.h>
1.240     schwarze   24: #include <sys/stat.h>
1.30      kristaps   25:
1.1       kristaps   26: #include <assert.h>
1.68      kristaps   27: #include <ctype.h>
1.76      kristaps   28: #include <stdarg.h>
1.229     schwarze   29: #include <stddef.h>
1.29      kristaps   30: #include <stdio.h>
1.63      kristaps   31: #include <stdint.h>
1.1       kristaps   32: #include <stdlib.h>
1.33      kristaps   33: #include <string.h>
1.45      kristaps   34: #include <unistd.h>
1.1       kristaps   35:
1.210     schwarze   36: #include "mandoc_aux.h"
1.229     schwarze   37: #include "mandoc_ohash.h"
1.100     kristaps   38: #include "mandoc.h"
1.210     schwarze   39: #include "roff.h"
1.58      kristaps   40: #include "out.h"
1.51      kristaps   41: #include "html.h"
1.186     schwarze   42: #include "manconf.h"
1.64      kristaps   43: #include "main.h"
1.63      kristaps   44:
1.29      kristaps   45: struct htmldata {
1.63      kristaps   46:        const char       *name;
1.29      kristaps   47:        int               flags;
1.257     schwarze   48: #define        HTML_INPHRASE    (1 << 0)  /* Can appear in phrasing context. */
                     49: #define        HTML_TOPHRASE    (1 << 1)  /* Establishes phrasing context. */
                     50: #define        HTML_NOSTACK     (1 << 2)  /* Does not have an end tag. */
                     51: #define        HTML_NLBEFORE    (1 << 3)  /* Output line break before opening. */
                     52: #define        HTML_NLBEGIN     (1 << 4)  /* Output line break after opening. */
                     53: #define        HTML_NLEND       (1 << 5)  /* Output line break before closing. */
                     54: #define        HTML_NLAFTER     (1 << 6)  /* Output line break after closing. */
1.196     schwarze   55: #define        HTML_NLAROUND    (HTML_NLBEFORE | HTML_NLAFTER)
                     56: #define        HTML_NLINSIDE    (HTML_NLBEGIN | HTML_NLEND)
                     57: #define        HTML_NLALL       (HTML_NLAROUND | HTML_NLINSIDE)
1.257     schwarze   58: #define        HTML_INDENT      (1 << 7)  /* Indent content by two spaces. */
                     59: #define        HTML_NOINDENT    (1 << 8)  /* Exception: never indent content. */
1.29      kristaps   60: };
1.7       kristaps   61:
1.29      kristaps   62: static const struct htmldata htmltags[TAG_MAX] = {
1.196     schwarze   63:        {"html",        HTML_NLALL},
                     64:        {"head",        HTML_NLALL | HTML_INDENT},
1.257     schwarze   65:        {"meta",        HTML_NOSTACK | HTML_NLALL},
                     66:        {"link",        HTML_NOSTACK | HTML_NLALL},
                     67:        {"style",       HTML_NLALL | HTML_INDENT},
                     68:        {"title",       HTML_NLAROUND},
1.196     schwarze   69:        {"body",        HTML_NLALL},
                     70:        {"div",         HTML_NLAROUND},
1.253     schwarze   71:        {"section",     HTML_NLALL},
1.196     schwarze   72:        {"table",       HTML_NLALL | HTML_INDENT},
                     73:        {"tr",          HTML_NLALL | HTML_INDENT},
                     74:        {"td",          HTML_NLAROUND},
                     75:        {"li",          HTML_NLAROUND | HTML_INDENT},
                     76:        {"ul",          HTML_NLALL | HTML_INDENT},
                     77:        {"ol",          HTML_NLALL | HTML_INDENT},
                     78:        {"dl",          HTML_NLALL | HTML_INDENT},
                     79:        {"dt",          HTML_NLAROUND},
                     80:        {"dd",          HTML_NLAROUND | HTML_INDENT},
1.257     schwarze   81:        {"h1",          HTML_TOPHRASE | HTML_NLAROUND},
                     82:        {"h2",          HTML_TOPHRASE | HTML_NLAROUND},
                     83:        {"p",           HTML_TOPHRASE | HTML_NLAROUND | HTML_INDENT},
1.271     schwarze   84:        {"pre",         HTML_TOPHRASE | HTML_NLAROUND | HTML_NOINDENT},
1.257     schwarze   85:        {"a",           HTML_INPHRASE | HTML_TOPHRASE},
                     86:        {"b",           HTML_INPHRASE | HTML_TOPHRASE},
                     87:        {"cite",        HTML_INPHRASE | HTML_TOPHRASE},
                     88:        {"code",        HTML_INPHRASE | HTML_TOPHRASE},
                     89:        {"i",           HTML_INPHRASE | HTML_TOPHRASE},
                     90:        {"small",       HTML_INPHRASE | HTML_TOPHRASE},
                     91:        {"span",        HTML_INPHRASE | HTML_TOPHRASE},
                     92:        {"var",         HTML_INPHRASE | HTML_TOPHRASE},
                     93:        {"br",          HTML_INPHRASE | HTML_NOSTACK | HTML_NLALL},
1.263     schwarze   94:        {"mark",        HTML_INPHRASE },
1.257     schwarze   95:        {"math",        HTML_INPHRASE | HTML_NLALL | HTML_INDENT},
1.196     schwarze   96:        {"mrow",        0},
                     97:        {"mi",          0},
1.215     schwarze   98:        {"mn",          0},
1.196     schwarze   99:        {"mo",          0},
                    100:        {"msup",        0},
                    101:        {"msub",        0},
                    102:        {"msubsup",     0},
                    103:        {"mfrac",       0},
                    104:        {"msqrt",       0},
                    105:        {"mfenced",     0},
                    106:        {"mtable",      0},
                    107:        {"mtr",         0},
                    108:        {"mtd",         0},
                    109:        {"munderover",  0},
                    110:        {"munder",      0},
                    111:        {"mover",       0},
1.90      kristaps  112: };
                    113:
1.229     schwarze  114: /* Avoid duplicate HTML id= attributes. */
1.269     schwarze  115:
                    116: struct id_entry {
                    117:        int      ord;   /* Ordinal number of the latest occurrence. */
                    118:        char     id[];  /* The id= attribute without any ordinal suffix. */
                    119: };
1.229     schwarze  120: static struct ohash     id_unique;
                    121:
1.254     schwarze  122: static void     html_reset_internal(struct html *);
1.197     schwarze  123: static void     print_byte(struct html *, char);
                    124: static void     print_endword(struct html *);
                    125: static void     print_indent(struct html *);
                    126: static void     print_word(struct html *, const char *);
                    127:
1.184     schwarze  128: static void     print_ctag(struct html *, struct tag *);
1.197     schwarze  129: static int      print_escape(struct html *, char);
1.195     schwarze  130: static int      print_encode(struct html *, const char *, const char *, int);
                    131: static void     print_href(struct html *, const char *, const char *, int);
1.255     schwarze  132: static void     print_metaf(struct html *);
1.82      kristaps  133:
1.156     schwarze  134:
1.180     schwarze  135: void *
1.191     schwarze  136: html_alloc(const struct manoutput *outopts)
1.10      kristaps  137: {
1.30      kristaps  138:        struct html     *h;
                    139:
1.128     kristaps  140:        h = mandoc_calloc(1, sizeof(struct html));
1.10      kristaps  141:
1.204     schwarze  142:        h->tag = NULL;
1.272   ! schwarze  143:        h->metac = h->metal = ESCAPE_FONTROMAN;
1.186     schwarze  144:        h->style = outopts->style;
1.240     schwarze  145:        if ((h->base_man1 = outopts->man) == NULL)
                    146:                h->base_man2 = NULL;
                    147:        else if ((h->base_man2 = strchr(h->base_man1, ';')) != NULL)
                    148:                *h->base_man2++ = '\0';
1.186     schwarze  149:        h->base_includes = outopts->includes;
                    150:        if (outopts->fragment)
                    151:                h->oflags |= HTML_FRAGMENT;
1.241     schwarze  152:        if (outopts->toc)
                    153:                h->oflags |= HTML_TOC;
1.43      kristaps  154:
1.269     schwarze  155:        mandoc_ohash_init(&id_unique, 4, offsetof(struct id_entry, id));
1.229     schwarze  156:
1.188     schwarze  157:        return h;
1.29      kristaps  158: }
1.10      kristaps  159:
1.254     schwarze  160: static void
                    161: html_reset_internal(struct html *h)
1.29      kristaps  162: {
1.30      kristaps  163:        struct tag      *tag;
1.269     schwarze  164:        struct id_entry *entry;
1.229     schwarze  165:        unsigned int     slot;
1.30      kristaps  166:
1.204     schwarze  167:        while ((tag = h->tag) != NULL) {
                    168:                h->tag = tag->next;
1.30      kristaps  169:                free(tag);
                    170:        }
1.269     schwarze  171:        entry = ohash_first(&id_unique, &slot);
                    172:        while (entry != NULL) {
                    173:                free(entry);
                    174:                entry = ohash_next(&id_unique, &slot);
1.229     schwarze  175:        }
                    176:        ohash_delete(&id_unique);
1.254     schwarze  177: }
                    178:
                    179: void
                    180: html_reset(void *p)
                    181: {
                    182:        html_reset_internal(p);
1.269     schwarze  183:        mandoc_ohash_init(&id_unique, 4, offsetof(struct id_entry, id));
1.254     schwarze  184: }
                    185:
                    186: void
                    187: html_free(void *p)
                    188: {
                    189:        html_reset_internal(p);
                    190:        free(p);
1.10      kristaps  191: }
1.2       kristaps  192:
1.51      kristaps  193: void
1.29      kristaps  194: print_gen_head(struct html *h)
                    195: {
1.165     kristaps  196:        struct tag      *t;
1.41      kristaps  197:
1.194     schwarze  198:        print_otag(h, TAG_META, "?", "charset", "utf-8");
1.222     schwarze  199:        if (h->style != NULL) {
                    200:                print_otag(h, TAG_LINK, "?h??", "rel", "stylesheet",
                    201:                    h->style, "type", "text/css", "media", "all");
                    202:                return;
                    203:        }
1.165     kristaps  204:
1.168     kristaps  205:        /*
1.222     schwarze  206:         * Print a minimal embedded style sheet.
1.168     kristaps  207:         */
1.196     schwarze  208:
1.194     schwarze  209:        t = print_otag(h, TAG_STYLE, "");
1.196     schwarze  210:        print_text(h, "table.head, table.foot { width: 100%; }");
1.197     schwarze  211:        print_endline(h);
1.196     schwarze  212:        print_text(h, "td.head-rtitle, td.foot-os { text-align: right; }");
1.197     schwarze  213:        print_endline(h);
1.196     schwarze  214:        print_text(h, "td.head-vol { text-align: center; }");
1.197     schwarze  215:        print_endline(h);
1.256     schwarze  216:        print_text(h, ".Nd, .Bf, .Op { display: inline; }");
1.225     schwarze  217:        print_endline(h);
1.256     schwarze  218:        print_text(h, ".Pa, .Ad { font-style: italic; }");
1.226     schwarze  219:        print_endline(h);
1.256     schwarze  220:        print_text(h, ".Ms { font-weight: bold; }");
1.228     schwarze  221:        print_endline(h);
1.256     schwarze  222:        print_text(h, ".Bl-diag ");
1.224     schwarze  223:        print_byte(h, '>');
                    224:        print_text(h, " dt { font-weight: bold; }");
1.223     schwarze  225:        print_endline(h);
1.256     schwarze  226:        print_text(h, "code.Nm, .Fl, .Cm, .Ic, code.In, .Fd, .Fn, .Cd "
                    227:            "{ font-weight: bold; font-family: inherit; }");
1.165     kristaps  228:        print_tagq(h, t);
1.4       kristaps  229: }
                    230:
1.255     schwarze  231: int
                    232: html_setfont(struct html *h, enum mandoc_esc font)
1.88      kristaps  233: {
1.255     schwarze  234:        switch (font) {
1.156     schwarze  235:        case ESCAPE_FONTPREV:
1.90      kristaps  236:                font = h->metal;
1.88      kristaps  237:                break;
1.156     schwarze  238:        case ESCAPE_FONTITALIC:
                    239:        case ESCAPE_FONTBOLD:
                    240:        case ESCAPE_FONTBI:
1.242     schwarze  241:        case ESCAPE_FONTCW:
1.255     schwarze  242:        case ESCAPE_FONTROMAN:
1.242     schwarze  243:                break;
1.156     schwarze  244:        case ESCAPE_FONT:
1.255     schwarze  245:                font = ESCAPE_FONTROMAN;
1.88      kristaps  246:                break;
                    247:        default:
1.255     schwarze  248:                return 0;
1.88      kristaps  249:        }
1.255     schwarze  250:        h->metal = h->metac;
                    251:        h->metac = font;
                    252:        return 1;
                    253: }
1.88      kristaps  254:
1.255     schwarze  255: static void
                    256: print_metaf(struct html *h)
                    257: {
1.122     kristaps  258:        if (h->metaf) {
                    259:                print_tagq(h, h->metaf);
                    260:                h->metaf = NULL;
                    261:        }
1.255     schwarze  262:        switch (h->metac) {
                    263:        case ESCAPE_FONTITALIC:
1.194     schwarze  264:                h->metaf = print_otag(h, TAG_I, "");
1.152     schwarze  265:                break;
1.255     schwarze  266:        case ESCAPE_FONTBOLD:
1.194     schwarze  267:                h->metaf = print_otag(h, TAG_B, "");
1.152     schwarze  268:                break;
1.255     schwarze  269:        case ESCAPE_FONTBI:
1.194     schwarze  270:                h->metaf = print_otag(h, TAG_B, "");
                    271:                print_otag(h, TAG_I, "");
1.152     schwarze  272:                break;
1.255     schwarze  273:        case ESCAPE_FONTCW:
1.242     schwarze  274:                h->metaf = print_otag(h, TAG_SPAN, "c", "Li");
                    275:                break;
1.152     schwarze  276:        default:
                    277:                break;
                    278:        }
1.248     schwarze  279: }
                    280:
1.249     schwarze  281: void
                    282: html_close_paragraph(struct html *h)
                    283: {
1.259     schwarze  284:        struct tag      *this, *next;
                    285:        int              flags;
1.249     schwarze  286:
1.259     schwarze  287:        this = h->tag;
                    288:        for (;;) {
                    289:                next = this->next;
                    290:                flags = htmltags[this->tag].flags;
                    291:                if (flags & (HTML_INPHRASE | HTML_TOPHRASE))
                    292:                        print_ctag(h, this);
                    293:                if ((flags & HTML_INPHRASE) == 0)
1.249     schwarze  294:                        break;
1.259     schwarze  295:                this = next;
1.249     schwarze  296:        }
                    297: }
                    298:
1.248     schwarze  299: /*
                    300:  * ROFF_nf switches to no-fill mode, ROFF_fi to fill mode.
                    301:  * TOKEN_NONE does not switch.  The old mode is returned.
                    302:  */
                    303: enum roff_tok
                    304: html_fillmode(struct html *h, enum roff_tok want)
                    305: {
                    306:        struct tag      *t;
                    307:        enum roff_tok    had;
                    308:
                    309:        for (t = h->tag; t != NULL; t = t->next)
                    310:                if (t->tag == TAG_PRE)
                    311:                        break;
                    312:
                    313:        had = t == NULL ? ROFF_fi : ROFF_nf;
                    314:
                    315:        if (want != had) {
                    316:                switch (want) {
                    317:                case ROFF_fi:
                    318:                        print_tagq(h, t);
                    319:                        break;
                    320:                case ROFF_nf:
1.249     schwarze  321:                        html_close_paragraph(h);
1.248     schwarze  322:                        print_otag(h, TAG_PRE, "");
                    323:                        break;
                    324:                case TOKEN_NONE:
                    325:                        break;
                    326:                default:
                    327:                        abort();
                    328:                }
                    329:        }
                    330:        return had;
1.210     schwarze  331: }
                    332:
1.264     schwarze  333: /*
                    334:  * Allocate a string to be used for the "id=" attribute of an HTML
                    335:  * element and/or as a segment identifier for a URI in an <a> element.
                    336:  * The function may fail and return NULL if the node lacks text data
                    337:  * to create the attribute from.
1.269     schwarze  338:  * The caller is responsible for free(3)ing the returned string.
                    339:  *
1.264     schwarze  340:  * If the "unique" argument is non-zero, the "id_unique" ohash table
1.269     schwarze  341:  * is used for de-duplication.  If the "unique" argument is 1,
                    342:  * it is the first time the function is called for this tag and
                    343:  * location, so if an ordinal suffix is needed, it is incremented.
                    344:  * If the "unique" argument is 2, it is the second time the function
                    345:  * is called for this tag and location, so the ordinal suffix
                    346:  * remains unchanged.
1.264     schwarze  347:  */
1.210     schwarze  348: char *
1.229     schwarze  349: html_make_id(const struct roff_node *n, int unique)
1.210     schwarze  350: {
                    351:        const struct roff_node  *nch;
1.269     schwarze  352:        struct id_entry         *entry;
                    353:        char                    *buf, *cp;
                    354:        size_t                   len;
1.229     schwarze  355:        unsigned int             slot;
1.210     schwarze  356:
1.267     schwarze  357:        if (n->tag != NULL)
                    358:                buf = mandoc_strdup(n->tag);
1.264     schwarze  359:        else {
                    360:                switch (n->tok) {
                    361:                case MDOC_Sh:
                    362:                case MDOC_Ss:
                    363:                case MDOC_Sx:
                    364:                case MAN_SH:
                    365:                case MAN_SS:
                    366:                        for (nch = n->child; nch != NULL; nch = nch->next)
                    367:                                if (nch->type != ROFFT_TEXT)
                    368:                                        return NULL;
                    369:                        buf = NULL;
                    370:                        deroff(&buf, n);
                    371:                        if (buf == NULL)
                    372:                                return NULL;
                    373:                        break;
                    374:                default:
1.265     schwarze  375:                        if (n->child == NULL || n->child->type != ROFFT_TEXT)
1.264     schwarze  376:                                return NULL;
                    377:                        buf = mandoc_strdup(n->child->string);
                    378:                        break;
                    379:                }
                    380:        }
1.210     schwarze  381:
1.230     schwarze  382:        /*
                    383:         * In ID attributes, only use ASCII characters that are
                    384:         * permitted in URL-fragment strings according to the
                    385:         * explicit list at:
                    386:         * https://url.spec.whatwg.org/#url-fragment-string
1.270     schwarze  387:         * In addition, reserve '~' for ordinal suffixes.
1.230     schwarze  388:         */
1.210     schwarze  389:
                    390:        for (cp = buf; *cp != '\0'; cp++)
1.230     schwarze  391:                if (isalnum((unsigned char)*cp) == 0 &&
1.270     schwarze  392:                    strchr("!$&'()*+,-./:;=?@_", *cp) == NULL)
1.210     schwarze  393:                        *cp = '_';
                    394:
1.229     schwarze  395:        if (unique == 0)
                    396:                return buf;
                    397:
                    398:        /* Avoid duplicate HTML id= attributes. */
                    399:
                    400:        slot = ohash_qlookup(&id_unique, buf);
1.269     schwarze  401:        if ((entry = ohash_find(&id_unique, slot)) == NULL) {
                    402:                len = strlen(buf) + 1;
                    403:                entry = mandoc_malloc(sizeof(*entry) + len);
                    404:                entry->ord = 1;
                    405:                memcpy(entry->id, buf, len);
                    406:                ohash_insert(&id_unique, slot, entry);
                    407:        } else if (unique == 1)
                    408:                entry->ord++;
                    409:
                    410:        if (entry->ord > 1) {
                    411:                cp = buf;
1.270     schwarze  412:                mandoc_asprintf(&buf, "%s~%d", cp, entry->ord);
1.269     schwarze  413:                free(cp);
1.229     schwarze  414:        }
1.210     schwarze  415:        return buf;
1.88      kristaps  416: }
                    417:
1.85      kristaps  418: static int
1.197     schwarze  419: print_escape(struct html *h, char c)
1.159     schwarze  420: {
                    421:
                    422:        switch (c) {
                    423:        case '<':
1.197     schwarze  424:                print_word(h, "&lt;");
1.159     schwarze  425:                break;
                    426:        case '>':
1.197     schwarze  427:                print_word(h, "&gt;");
1.159     schwarze  428:                break;
                    429:        case '&':
1.197     schwarze  430:                print_word(h, "&amp;");
1.159     schwarze  431:                break;
                    432:        case '"':
1.197     schwarze  433:                print_word(h, "&quot;");
1.159     schwarze  434:                break;
                    435:        case ASCII_NBRSP:
1.197     schwarze  436:                print_word(h, "&nbsp;");
1.159     schwarze  437:                break;
                    438:        case ASCII_HYPH:
1.197     schwarze  439:                print_byte(h, '-');
1.189     schwarze  440:                break;
1.159     schwarze  441:        case ASCII_BREAK:
                    442:                break;
                    443:        default:
1.188     schwarze  444:                return 0;
1.159     schwarze  445:        }
1.188     schwarze  446:        return 1;
1.159     schwarze  447: }
                    448:
                    449: static int
1.195     schwarze  450: print_encode(struct html *h, const char *p, const char *pend, int norecurse)
1.29      kristaps  451: {
1.197     schwarze  452:        char             numbuf[16];
1.214     schwarze  453:        const char      *seq;
1.77      kristaps  454:        size_t           sz;
1.214     schwarze  455:        int              c, len, breakline, nospace;
1.132     kristaps  456:        enum mandoc_esc  esc;
1.214     schwarze  457:        static const char rejs[10] = { ' ', '\\', '<', '>', '&', '"',
1.154     schwarze  458:                ASCII_NBRSP, ASCII_HYPH, ASCII_BREAK, '\0' };
1.14      kristaps  459:
1.195     schwarze  460:        if (pend == NULL)
                    461:                pend = strchr(p, '\0');
                    462:
1.214     schwarze  463:        breakline = 0;
1.85      kristaps  464:        nospace = 0;
                    465:
1.195     schwarze  466:        while (p < pend) {
1.151     schwarze  467:                if (HTML_SKIPCHAR & h->flags && '\\' != *p) {
                    468:                        h->flags &= ~HTML_SKIPCHAR;
                    469:                        p++;
                    470:                        continue;
                    471:                }
                    472:
1.197     schwarze  473:                for (sz = strcspn(p, rejs); sz-- && p < pend; p++)
1.214     schwarze  474:                        print_byte(h, *p);
                    475:
                    476:                if (breakline &&
                    477:                    (p >= pend || *p == ' ' || *p == ASCII_NBRSP)) {
1.245     schwarze  478:                        print_otag(h, TAG_BR, "");
1.214     schwarze  479:                        breakline = 0;
                    480:                        while (p < pend && (*p == ' ' || *p == ASCII_NBRSP))
                    481:                                p++;
                    482:                        continue;
                    483:                }
1.77      kristaps  484:
1.195     schwarze  485:                if (p >= pend)
1.132     kristaps  486:                        break;
                    487:
1.214     schwarze  488:                if (*p == ' ') {
                    489:                        print_endword(h);
                    490:                        p++;
                    491:                        continue;
                    492:                }
                    493:
1.197     schwarze  494:                if (print_escape(h, *p++))
1.154     schwarze  495:                        continue;
1.77      kristaps  496:
1.132     kristaps  497:                esc = mandoc_escape(&p, &seq, &len);
                    498:                switch (esc) {
1.156     schwarze  499:                case ESCAPE_FONT:
                    500:                case ESCAPE_FONTPREV:
                    501:                case ESCAPE_FONTBOLD:
                    502:                case ESCAPE_FONTITALIC:
                    503:                case ESCAPE_FONTBI:
1.242     schwarze  504:                case ESCAPE_FONTCW:
1.156     schwarze  505:                case ESCAPE_FONTROMAN:
1.243     schwarze  506:                        if (0 == norecurse) {
                    507:                                h->flags |= HTML_NOSPACE;
1.255     schwarze  508:                                if (html_setfont(h, esc))
                    509:                                        print_metaf(h);
1.243     schwarze  510:                                h->flags &= ~HTML_NOSPACE;
                    511:                        }
1.151     schwarze  512:                        continue;
1.156     schwarze  513:                case ESCAPE_SKIPCHAR:
1.151     schwarze  514:                        h->flags |= HTML_SKIPCHAR;
                    515:                        continue;
1.246     schwarze  516:                case ESCAPE_ERROR:
                    517:                        continue;
1.151     schwarze  518:                default:
                    519:                        break;
                    520:                }
                    521:
                    522:                if (h->flags & HTML_SKIPCHAR) {
                    523:                        h->flags &= ~HTML_SKIPCHAR;
                    524:                        continue;
                    525:                }
                    526:
                    527:                switch (esc) {
1.156     schwarze  528:                case ESCAPE_UNICODE:
1.159     schwarze  529:                        /* Skip past "u" header. */
1.144     kristaps  530:                        c = mchars_num2uc(seq + 1, len - 1);
                    531:                        break;
1.156     schwarze  532:                case ESCAPE_NUMBERED:
1.141     kristaps  533:                        c = mchars_num2char(seq, len);
1.181     schwarze  534:                        if (c < 0)
                    535:                                continue;
1.82      kristaps  536:                        break;
1.156     schwarze  537:                case ESCAPE_SPECIAL:
1.191     schwarze  538:                        c = mchars_spec2cp(seq, len);
1.181     schwarze  539:                        if (c <= 0)
                    540:                                continue;
1.246     schwarze  541:                        break;
                    542:                case ESCAPE_UNDEF:
                    543:                        c = *seq;
1.132     kristaps  544:                        break;
1.239     schwarze  545:                case ESCAPE_DEVICE:
                    546:                        print_word(h, "html");
                    547:                        continue;
1.214     schwarze  548:                case ESCAPE_BREAK:
                    549:                        breakline = 1;
                    550:                        continue;
1.156     schwarze  551:                case ESCAPE_NOSPACE:
1.132     kristaps  552:                        if ('\0' == *p)
                    553:                                nospace = 1;
1.179     schwarze  554:                        continue;
1.185     schwarze  555:                case ESCAPE_OVERSTRIKE:
                    556:                        if (len == 0)
                    557:                                continue;
                    558:                        c = seq[len - 1];
                    559:                        break;
1.82      kristaps  560:                default:
1.179     schwarze  561:                        continue;
1.82      kristaps  562:                }
1.181     schwarze  563:                if ((c < 0x20 && c != 0x09) ||
                    564:                    (c > 0x7E && c < 0xA0))
1.179     schwarze  565:                        c = 0xFFFD;
1.197     schwarze  566:                if (c > 0x7E) {
1.216     schwarze  567:                        (void)snprintf(numbuf, sizeof(numbuf), "&#x%.4X;", c);
1.197     schwarze  568:                        print_word(h, numbuf);
                    569:                } else if (print_escape(h, c) == 0)
                    570:                        print_byte(h, c);
1.32      kristaps  571:        }
1.85      kristaps  572:
1.188     schwarze  573:        return nospace;
1.14      kristaps  574: }
                    575:
1.94      kristaps  576: static void
1.195     schwarze  577: print_href(struct html *h, const char *name, const char *sec, int man)
1.94      kristaps  578: {
1.240     schwarze  579:        struct stat      sb;
1.195     schwarze  580:        const char      *p, *pp;
1.240     schwarze  581:        char            *filename;
                    582:
                    583:        if (man) {
                    584:                pp = h->base_man1;
                    585:                if (h->base_man2 != NULL) {
                    586:                        mandoc_asprintf(&filename, "%s.%s", name, sec);
                    587:                        if (stat(filename, &sb) == -1)
                    588:                                pp = h->base_man2;
                    589:                        free(filename);
                    590:                }
                    591:        } else
                    592:                pp = h->base_includes;
1.195     schwarze  593:
                    594:        while ((p = strchr(pp, '%')) != NULL) {
                    595:                print_encode(h, pp, p, 1);
                    596:                if (man && p[1] == 'S') {
                    597:                        if (sec == NULL)
1.197     schwarze  598:                                print_byte(h, '1');
1.195     schwarze  599:                        else
                    600:                                print_encode(h, sec, NULL, 1);
                    601:                } else if ((man && p[1] == 'N') ||
                    602:                    (man == 0 && p[1] == 'I'))
                    603:                        print_encode(h, name, NULL, 1);
                    604:                else
                    605:                        print_encode(h, p, p + 2, 1);
                    606:                pp = p + 2;
                    607:        }
                    608:        if (*pp != '\0')
                    609:                print_encode(h, pp, NULL, 1);
1.94      kristaps  610: }
                    611:
1.51      kristaps  612: struct tag *
1.194     schwarze  613: print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
1.14      kristaps  614: {
1.194     schwarze  615:        va_list          ap;
1.30      kristaps  616:        struct tag      *t;
1.195     schwarze  617:        const char      *attr;
1.203     schwarze  618:        char            *arg1, *arg2;
1.244     schwarze  619:        int              style_written, tflags;
1.196     schwarze  620:
                    621:        tflags = htmltags[tag].flags;
1.30      kristaps  622:
1.257     schwarze  623:        /* Flow content is not allowed in phrasing context. */
                    624:
                    625:        if ((tflags & HTML_INPHRASE) == 0) {
                    626:                for (t = h->tag; t != NULL; t = t->next) {
                    627:                        if (t->closed)
                    628:                                continue;
                    629:                        assert((htmltags[t->tag].flags & HTML_TOPHRASE) == 0);
                    630:                        break;
                    631:                }
1.260     schwarze  632:
                    633:        /*
                    634:         * Always wrap phrasing elements in a paragraph
                    635:         * unless already contained in some flow container;
                    636:         * never put them directly into a section.
                    637:         */
                    638:
                    639:        } else if (tflags & HTML_TOPHRASE && h->tag->tag == TAG_SECTION)
                    640:                print_otag(h, TAG_P, "c", "Pp");
1.257     schwarze  641:
1.204     schwarze  642:        /* Push this tag onto the stack of open scopes. */
1.94      kristaps  643:
1.196     schwarze  644:        if ((tflags & HTML_NOSTACK) == 0) {
1.128     kristaps  645:                t = mandoc_malloc(sizeof(struct tag));
1.30      kristaps  646:                t->tag = tag;
1.204     schwarze  647:                t->next = h->tag;
1.252     schwarze  648:                t->refcnt = 0;
                    649:                t->closed = 0;
1.204     schwarze  650:                h->tag = t;
1.30      kristaps  651:        } else
                    652:                t = NULL;
1.29      kristaps  653:
1.196     schwarze  654:        if (tflags & HTML_NLBEFORE)
1.197     schwarze  655:                print_endline(h);
                    656:        if (h->col == 0)
                    657:                print_indent(h);
1.196     schwarze  658:        else if ((h->flags & HTML_NOSPACE) == 0) {
                    659:                if (h->flags & HTML_KEEP)
1.216     schwarze  660:                        print_word(h, "&#x00A0;");
1.196     schwarze  661:                else {
                    662:                        if (h->flags & HTML_PREKEEP)
                    663:                                h->flags |= HTML_KEEP;
1.197     schwarze  664:                        print_endword(h);
1.105     kristaps  665:                }
1.196     schwarze  666:        }
1.29      kristaps  667:
1.109     kristaps  668:        if ( ! (h->flags & HTML_NONOSPACE))
                    669:                h->flags &= ~HTML_NOSPACE;
1.110     kristaps  670:        else
                    671:                h->flags |= HTML_NOSPACE;
1.109     kristaps  672:
1.94      kristaps  673:        /* Print out the tag name and attributes. */
                    674:
1.197     schwarze  675:        print_byte(h, '<');
                    676:        print_word(h, htmltags[tag].name);
1.194     schwarze  677:
                    678:        va_start(ap, fmt);
                    679:
1.244     schwarze  680:        while (*fmt != '\0' && *fmt != 's') {
1.203     schwarze  681:
1.238     schwarze  682:                /* Parse attributes and arguments. */
1.203     schwarze  683:
                    684:                arg1 = va_arg(ap, char *);
1.238     schwarze  685:                arg2 = NULL;
1.194     schwarze  686:                switch (*fmt++) {
                    687:                case 'c':
1.195     schwarze  688:                        attr = "class";
1.194     schwarze  689:                        break;
                    690:                case 'h':
1.195     schwarze  691:                        attr = "href";
1.194     schwarze  692:                        break;
                    693:                case 'i':
1.195     schwarze  694:                        attr = "id";
1.194     schwarze  695:                        break;
                    696:                case '?':
1.203     schwarze  697:                        attr = arg1;
                    698:                        arg1 = va_arg(ap, char *);
1.194     schwarze  699:                        break;
                    700:                default:
                    701:                        abort();
                    702:                }
1.203     schwarze  703:                if (*fmt == 'M')
                    704:                        arg2 = va_arg(ap, char *);
                    705:                if (arg1 == NULL)
                    706:                        continue;
                    707:
1.238     schwarze  708:                /* Print the attributes. */
1.203     schwarze  709:
1.197     schwarze  710:                print_byte(h, ' ');
                    711:                print_word(h, attr);
                    712:                print_byte(h, '=');
                    713:                print_byte(h, '"');
1.195     schwarze  714:                switch (*fmt) {
1.208     schwarze  715:                case 'I':
                    716:                        print_href(h, arg1, NULL, 0);
                    717:                        fmt++;
                    718:                        break;
1.195     schwarze  719:                case 'M':
1.203     schwarze  720:                        print_href(h, arg1, arg2, 1);
1.195     schwarze  721:                        fmt++;
                    722:                        break;
1.208     schwarze  723:                case 'R':
                    724:                        print_byte(h, '#');
                    725:                        print_encode(h, arg1, NULL, 1);
1.195     schwarze  726:                        fmt++;
1.208     schwarze  727:                        break;
1.195     schwarze  728:                default:
1.244     schwarze  729:                        print_encode(h, arg1, NULL, 1);
1.195     schwarze  730:                        break;
                    731:                }
1.197     schwarze  732:                print_byte(h, '"');
1.194     schwarze  733:        }
1.244     schwarze  734:
                    735:        style_written = 0;
                    736:        while (*fmt++ == 's') {
                    737:                arg1 = va_arg(ap, char *);
                    738:                arg2 = va_arg(ap, char *);
                    739:                if (arg2 == NULL)
                    740:                        continue;
                    741:                print_byte(h, ' ');
                    742:                if (style_written == 0) {
                    743:                        print_word(h, "style=\"");
                    744:                        style_written = 1;
                    745:                }
                    746:                print_word(h, arg1);
                    747:                print_byte(h, ':');
                    748:                print_byte(h, ' ');
                    749:                print_word(h, arg2);
                    750:                print_byte(h, ';');
                    751:        }
                    752:        if (style_written)
                    753:                print_byte(h, '"');
                    754:
1.194     schwarze  755:        va_end(ap);
1.94      kristaps  756:
1.172     kristaps  757:        /* Accommodate for "well-formed" singleton escaping. */
1.94      kristaps  758:
1.257     schwarze  759:        if (htmltags[tag].flags & HTML_NOSTACK)
1.197     schwarze  760:                print_byte(h, '/');
1.93      kristaps  761:
1.197     schwarze  762:        print_byte(h, '>');
1.14      kristaps  763:
1.196     schwarze  764:        if (tflags & HTML_NLBEGIN)
1.197     schwarze  765:                print_endline(h);
1.196     schwarze  766:        else
                    767:                h->flags |= HTML_NOSPACE;
1.117     kristaps  768:
1.196     schwarze  769:        if (tflags & HTML_INDENT)
                    770:                h->indent++;
                    771:        if (tflags & HTML_NOINDENT)
                    772:                h->noindent++;
1.117     kristaps  773:
1.188     schwarze  774:        return t;
1.264     schwarze  775: }
                    776:
                    777: /*
                    778:  * Print an element with an optional "id=" attribute.
1.265     schwarze  779:  * If the element has phrasing content and an "id=" attribute,
                    780:  * also add a permalink: outside if it can be in phrasing context,
                    781:  * inside otherwise.
1.264     schwarze  782:  */
                    783: struct tag *
                    784: print_otag_id(struct html *h, enum htmltag elemtype, const char *cattr,
                    785:     struct roff_node *n)
                    786: {
1.265     schwarze  787:        struct roff_node *nch;
1.264     schwarze  788:        struct tag      *ret, *t;
1.266     schwarze  789:        char            *id, *href;
1.264     schwarze  790:
                    791:        ret = NULL;
1.266     schwarze  792:        id = href = NULL;
1.264     schwarze  793:        if (n->flags & NODE_ID)
                    794:                id = html_make_id(n, 1);
1.266     schwarze  795:        if (n->flags & NODE_HREF)
1.269     schwarze  796:                href = id == NULL ? html_make_id(n, 2) : id;
1.266     schwarze  797:        if (href != NULL && htmltags[elemtype].flags & HTML_INPHRASE)
                    798:                ret = print_otag(h, TAG_A, "chR", "permalink", href);
1.264     schwarze  799:        t = print_otag(h, elemtype, "ci", cattr, id);
                    800:        if (ret == NULL) {
                    801:                ret = t;
1.266     schwarze  802:                if (href != NULL && (nch = n->child) != NULL) {
1.265     schwarze  803:                        /* man(7) is safe, it tags phrasing content only. */
                    804:                        if (n->tok > MDOC_MAX ||
                    805:                            htmltags[elemtype].flags & HTML_TOPHRASE)
                    806:                                nch = NULL;
                    807:                        else  /* For mdoc(7), beware of nested blocks. */
                    808:                                while (nch != NULL && nch->type == ROFFT_TEXT)
                    809:                                        nch = nch->next;
                    810:                        if (nch == NULL)
1.266     schwarze  811:                                print_otag(h, TAG_A, "chR", "permalink", href);
1.265     schwarze  812:                }
1.264     schwarze  813:        }
1.269     schwarze  814:        free(id);
1.266     schwarze  815:        if (id == NULL)
                    816:                free(href);
1.264     schwarze  817:        return ret;
1.14      kristaps  818: }
                    819:
1.29      kristaps  820: static void
1.184     schwarze  821: print_ctag(struct html *h, struct tag *tag)
1.14      kristaps  822: {
1.196     schwarze  823:        int      tflags;
1.156     schwarze  824:
1.252     schwarze  825:        if (tag->closed == 0) {
                    826:                tag->closed = 1;
                    827:                if (tag == h->metaf)
                    828:                        h->metaf = NULL;
                    829:                if (tag == h->tblt)
                    830:                        h->tblt = NULL;
                    831:
                    832:                tflags = htmltags[tag->tag].flags;
                    833:                if (tflags & HTML_INDENT)
                    834:                        h->indent--;
                    835:                if (tflags & HTML_NOINDENT)
                    836:                        h->noindent--;
                    837:                if (tflags & HTML_NLEND)
                    838:                        print_endline(h);
                    839:                print_indent(h);
                    840:                print_byte(h, '<');
                    841:                print_byte(h, '/');
                    842:                print_word(h, htmltags[tag->tag].name);
                    843:                print_byte(h, '>');
                    844:                if (tflags & HTML_NLAFTER)
                    845:                        print_endline(h);
                    846:        }
                    847:        if (tag->refcnt == 0) {
                    848:                h->tag = tag->next;
                    849:                free(tag);
                    850:        }
1.14      kristaps  851: }
                    852:
1.51      kristaps  853: void
1.93      kristaps  854: print_gen_decls(struct html *h)
1.1       kristaps  855: {
1.197     schwarze  856:        print_word(h, "<!DOCTYPE html>");
                    857:        print_endline(h);
1.221     schwarze  858: }
                    859:
                    860: void
                    861: print_gen_comment(struct html *h, struct roff_node *n)
                    862: {
                    863:        int      wantblank;
                    864:
                    865:        print_word(h, "<!-- This is an automatically generated file."
                    866:            "  Do not edit.");
                    867:        h->indent = 1;
                    868:        wantblank = 0;
                    869:        while (n != NULL && n->type == ROFFT_COMMENT) {
                    870:                if (strstr(n->string, "-->") == NULL &&
                    871:                    (wantblank || *n->string != '\0')) {
                    872:                        print_endline(h);
                    873:                        print_indent(h);
                    874:                        print_word(h, n->string);
                    875:                        wantblank = *n->string != '\0';
                    876:                }
                    877:                n = n->next;
                    878:        }
                    879:        if (wantblank)
                    880:                print_endline(h);
                    881:        print_word(h, " -->");
                    882:        print_endline(h);
                    883:        h->indent = 0;
1.1       kristaps  884: }
                    885:
1.51      kristaps  886: void
1.104     kristaps  887: print_text(struct html *h, const char *word)
1.1       kristaps  888: {
1.268     schwarze  889:        print_tagged_text(h, word, NULL);
                    890: }
                    891:
                    892: void
                    893: print_tagged_text(struct html *h, const char *word, struct roff_node *n)
                    894: {
                    895:        struct tag      *t;
                    896:        char            *href;
                    897:
1.260     schwarze  898:        /*
                    899:         * Always wrap text in a paragraph unless already contained in
                    900:         * some flow container; never put it directly into a section.
                    901:         */
                    902:
                    903:        if (h->tag->tag == TAG_SECTION)
                    904:                print_otag(h, TAG_P, "c", "Pp");
                    905:
                    906:        /* Output whitespace before this text? */
                    907:
1.197     schwarze  908:        if (h->col && (h->flags & HTML_NOSPACE) == 0) {
1.105     kristaps  909:                if ( ! (HTML_KEEP & h->flags)) {
                    910:                        if (HTML_PREKEEP & h->flags)
                    911:                                h->flags |= HTML_KEEP;
1.197     schwarze  912:                        print_endword(h);
1.105     kristaps  913:                } else
1.216     schwarze  914:                        print_word(h, "&#x00A0;");
1.105     kristaps  915:        }
1.260     schwarze  916:
                    917:        /*
1.268     schwarze  918:         * Optionally switch fonts, optionally write a permalink, then
                    919:         * print the text, optionally surrounded by HTML whitespace.
1.260     schwarze  920:         */
1.30      kristaps  921:
1.255     schwarze  922:        assert(h->metaf == NULL);
                    923:        print_metaf(h);
                    924:        print_indent(h);
1.268     schwarze  925:
1.269     schwarze  926:        if (n != NULL && (href = html_make_id(n, 2)) != NULL) {
1.268     schwarze  927:                t = print_otag(h, TAG_A, "chR", "permalink", href);
                    928:                free(href);
                    929:        } else
                    930:                t = NULL;
                    931:
1.195     schwarze  932:        if ( ! print_encode(h, word, NULL, 0)) {
1.109     kristaps  933:                if ( ! (h->flags & HTML_NONOSPACE))
                    934:                        h->flags &= ~HTML_NOSPACE;
1.183     schwarze  935:                h->flags &= ~HTML_NONEWLINE;
1.149     kristaps  936:        } else
1.183     schwarze  937:                h->flags |= HTML_NOSPACE | HTML_NONEWLINE;
1.122     kristaps  938:
1.255     schwarze  939:        if (h->metaf != NULL) {
1.122     kristaps  940:                print_tagq(h, h->metaf);
                    941:                h->metaf = NULL;
1.268     schwarze  942:        } else if (t != NULL)
                    943:                print_tagq(h, t);
1.113     schwarze  944:
                    945:        h->flags &= ~HTML_IGNDELIM;
1.1       kristaps  946: }
1.30      kristaps  947:
1.51      kristaps  948: void
1.30      kristaps  949: print_tagq(struct html *h, const struct tag *until)
                    950: {
1.252     schwarze  951:        struct tag      *this, *next;
1.30      kristaps  952:
1.252     schwarze  953:        for (this = h->tag; this != NULL; this = next) {
                    954:                next = this == until ? NULL : this->next;
                    955:                print_ctag(h, this);
1.30      kristaps  956:        }
                    957: }
                    958:
1.250     schwarze  959: /*
                    960:  * Close out all open elements up to but excluding suntil.
                    961:  * Note that a paragraph just inside stays open together with it
                    962:  * because paragraphs include subsequent phrasing content.
                    963:  */
1.51      kristaps  964: void
1.30      kristaps  965: print_stagq(struct html *h, const struct tag *suntil)
                    966: {
1.252     schwarze  967:        struct tag      *this, *next;
1.30      kristaps  968:
1.252     schwarze  969:        for (this = h->tag; this != NULL; this = next) {
                    970:                next = this->next;
                    971:                if (this == suntil || (next == suntil &&
                    972:                    (this->tag == TAG_P || this->tag == TAG_PRE)))
                    973:                        break;
                    974:                print_ctag(h, this);
1.30      kristaps  975:        }
1.171     kristaps  976: }
                    977:
1.197     schwarze  978:
                    979: /***********************************************************************
                    980:  * Low level output functions.
                    981:  * They implement line breaking using a short static buffer.
                    982:  ***********************************************************************/
                    983:
                    984: /*
                    985:  * Buffer one HTML output byte.
                    986:  * If the buffer is full, flush and deactivate it and start a new line.
                    987:  * If the buffer is inactive, print directly.
                    988:  */
                    989: static void
                    990: print_byte(struct html *h, char c)
                    991: {
                    992:        if ((h->flags & HTML_BUFFER) == 0) {
                    993:                putchar(c);
                    994:                h->col++;
                    995:                return;
                    996:        }
                    997:
                    998:        if (h->col + h->bufcol < sizeof(h->buf)) {
                    999:                h->buf[h->bufcol++] = c;
                   1000:                return;
                   1001:        }
                   1002:
                   1003:        putchar('\n');
                   1004:        h->col = 0;
                   1005:        print_indent(h);
                   1006:        putchar(' ');
                   1007:        putchar(' ');
                   1008:        fwrite(h->buf, h->bufcol, 1, stdout);
                   1009:        putchar(c);
                   1010:        h->col = (h->indent + 1) * 2 + h->bufcol + 1;
                   1011:        h->bufcol = 0;
                   1012:        h->flags &= ~HTML_BUFFER;
                   1013: }
                   1014:
1.196     schwarze 1015: /*
                   1016:  * If something was printed on the current output line, end it.
1.197     schwarze 1017:  * Not to be called right after print_indent().
1.196     schwarze 1018:  */
1.202     schwarze 1019: void
1.197     schwarze 1020: print_endline(struct html *h)
1.196     schwarze 1021: {
1.197     schwarze 1022:        if (h->col == 0)
1.196     schwarze 1023:                return;
                   1024:
1.197     schwarze 1025:        if (h->bufcol) {
                   1026:                putchar(' ');
                   1027:                fwrite(h->buf, h->bufcol, 1, stdout);
                   1028:                h->bufcol = 0;
                   1029:        }
1.196     schwarze 1030:        putchar('\n');
1.197     schwarze 1031:        h->col = 0;
                   1032:        h->flags |= HTML_NOSPACE;
                   1033:        h->flags &= ~HTML_BUFFER;
                   1034: }
                   1035:
                   1036: /*
                   1037:  * Flush the HTML output buffer.
                   1038:  * If it is inactive, activate it.
                   1039:  */
                   1040: static void
                   1041: print_endword(struct html *h)
                   1042: {
                   1043:        if (h->noindent) {
                   1044:                print_byte(h, ' ');
                   1045:                return;
                   1046:        }
                   1047:
                   1048:        if ((h->flags & HTML_BUFFER) == 0) {
                   1049:                h->col++;
                   1050:                h->flags |= HTML_BUFFER;
                   1051:        } else if (h->bufcol) {
                   1052:                putchar(' ');
                   1053:                fwrite(h->buf, h->bufcol, 1, stdout);
                   1054:                h->col += h->bufcol + 1;
                   1055:        }
                   1056:        h->bufcol = 0;
1.196     schwarze 1057: }
                   1058:
                   1059: /*
                   1060:  * If at the beginning of a new output line,
                   1061:  * perform indentation and mark the line as containing output.
                   1062:  * Make sure to really produce some output right afterwards,
                   1063:  * but do not use print_otag() for producing it.
                   1064:  */
                   1065: static void
1.197     schwarze 1066: print_indent(struct html *h)
1.196     schwarze 1067: {
1.197     schwarze 1068:        size_t   i;
1.196     schwarze 1069:
1.261     schwarze 1070:        if (h->col || h->noindent)
1.196     schwarze 1071:                return;
                   1072:
1.261     schwarze 1073:        h->col = h->indent * 2;
                   1074:        for (i = 0; i < h->col; i++)
                   1075:                putchar(' ');
1.197     schwarze 1076: }
                   1077:
                   1078: /*
                   1079:  * Print or buffer some characters
                   1080:  * depending on the current HTML output buffer state.
                   1081:  */
                   1082: static void
                   1083: print_word(struct html *h, const char *cp)
                   1084: {
                   1085:        while (*cp != '\0')
                   1086:                print_byte(h, *cp++);
1.68      kristaps 1087: }

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