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-rw-r--r--html.c236
1 files changed, 171 insertions, 65 deletions
diff --git a/html.c b/html.c
index 96702d0f..49a29bab 100644
--- a/html.c
+++ b/html.c
@@ -1,4 +1,4 @@
-/* $Id: html.c,v 1.196 2017/01/18 19:22:21 schwarze Exp $ */
+/* $Id: html.c,v 1.197 2017/01/19 01:00:14 schwarze Exp $ */
/*
* Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2011-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -114,10 +114,14 @@ static const char *const roffscales[SCALE_MAX] = {
};
static void a2width(const char *, struct roffsu *);
-static void html_endline(struct html *);
-static void html_indent(struct html *);
+static void print_byte(struct html *, char);
+static void print_endline(struct html *);
+static void print_endword(struct html *);
+static void print_indent(struct html *);
+static void print_word(struct html *, const char *);
+
static void print_ctag(struct html *, struct tag *);
-static int print_escape(char);
+static int print_escape(struct html *, char);
static int print_encode(struct html *, const char *, const char *, int);
static void print_href(struct html *, const char *, const char *, int);
static void print_metaf(struct html *, enum mandoc_esc);
@@ -169,15 +173,15 @@ print_gen_head(struct html *h)
t = print_otag(h, TAG_STYLE, "");
print_text(h, "table.head, table.foot { width: 100%; }");
- html_endline(h);
+ print_endline(h);
print_text(h, "td.head-rtitle, td.foot-os { text-align: right; }");
- html_endline(h);
+ print_endline(h);
print_text(h, "td.head-vol { text-align: center; }");
- html_endline(h);
+ print_endline(h);
print_text(h, "table.foot td { width: 50%; }");
- html_endline(h);
+ print_endline(h);
print_text(h, "table.head td { width: 33%; }");
- html_endline(h);
+ print_endline(h);
print_text(h, "div.spacer { margin: 1em 0; }");
print_tagq(h, t);
@@ -288,27 +292,27 @@ html_strlen(const char *cp)
}
static int
-print_escape(char c)
+print_escape(struct html *h, char c)
{
switch (c) {
case '<':
- printf("&lt;");
+ print_word(h, "&lt;");
break;
case '>':
- printf("&gt;");
+ print_word(h, "&gt;");
break;
case '&':
- printf("&amp;");
+ print_word(h, "&amp;");
break;
case '"':
- printf("&quot;");
+ print_word(h, "&quot;");
break;
case ASCII_NBRSP:
- printf("&nbsp;");
+ print_word(h, "&nbsp;");
break;
case ASCII_HYPH:
- putchar('-');
+ print_byte(h, '-');
break;
case ASCII_BREAK:
break;
@@ -321,6 +325,7 @@ print_escape(char c)
static int
print_encode(struct html *h, const char *p, const char *pend, int norecurse)
{
+ char numbuf[16];
size_t sz;
int c, len, nospace;
const char *seq;
@@ -340,17 +345,16 @@ print_encode(struct html *h, const char *p, const char *pend, int norecurse)
continue;
}
- sz = strcspn(p, rejs);
- if (p + sz > pend)
- sz = pend - p;
-
- fwrite(p, 1, sz, stdout);
- p += (int)sz;
+ for (sz = strcspn(p, rejs); sz-- && p < pend; p++)
+ if (*p == ' ')
+ print_endword(h);
+ else
+ print_byte(h, *p);
if (p >= pend)
break;
- if (print_escape(*p++))
+ if (print_escape(h, *p++))
continue;
esc = mandoc_escape(&p, &seq, &len);
@@ -409,10 +413,11 @@ print_encode(struct html *h, const char *p, const char *pend, int norecurse)
if ((c < 0x20 && c != 0x09) ||
(c > 0x7E && c < 0xA0))
c = 0xFFFD;
- if (c > 0x7E)
- printf("&#%d;", c);
- else if ( ! print_escape(c))
- putchar(c);
+ if (c > 0x7E) {
+ (void)snprintf(numbuf, sizeof(numbuf), "&#%d;", c);
+ print_word(h, numbuf);
+ } else if (print_escape(h, c) == 0)
+ print_byte(h, c);
}
return nospace;
@@ -428,7 +433,7 @@ print_href(struct html *h, const char *name, const char *sec, int man)
print_encode(h, pp, p, 1);
if (man && p[1] == 'S') {
if (sec == NULL)
- putchar('1');
+ print_byte(h, '1');
else
print_encode(h, sec, NULL, 1);
} else if ((man && p[1] == 'N') ||
@@ -447,6 +452,7 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
{
va_list ap;
struct roffsu mysu, *su;
+ char numbuf[16];
struct tag *t;
const char *attr;
char *s;
@@ -466,16 +472,16 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
t = NULL;
if (tflags & HTML_NLBEFORE)
- html_endline(h);
- if (h->flags & HTML_NLDONE)
- html_indent(h);
+ print_endline(h);
+ if (h->col == 0)
+ print_indent(h);
else if ((h->flags & HTML_NOSPACE) == 0) {
if (h->flags & HTML_KEEP)
- printf("&#160;");
+ print_word(h, "&#160;");
else {
if (h->flags & HTML_PREKEEP)
h->flags |= HTML_KEEP;
- putchar(' ');
+ print_endword(h);
}
}
@@ -486,14 +492,15 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
/* Print out the tag name and attributes. */
- printf("<%s", htmltags[tag].name);
+ print_byte(h, '<');
+ print_word(h, htmltags[tag].name);
va_start(ap, fmt);
have_style = 0;
while (*fmt != '\0') {
if (*fmt == 's') {
- printf(" style=\"");
+ print_word(h, " style=\"");
have_style = 1;
fmt++;
break;
@@ -516,7 +523,10 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
default:
abort();
}
- printf(" %s=\"", attr);
+ print_byte(h, ' ');
+ print_word(h, attr);
+ print_byte(h, '=');
+ print_byte(h, '"');
switch (*fmt) {
case 'M':
print_href(h, s, va_arg(ap, char *), 1);
@@ -527,14 +537,14 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
fmt++;
break;
case 'R':
- putchar('#');
+ print_byte(h, '#');
fmt++;
/* FALLTHROUGH */
default:
print_encode(h, s, NULL, 1);
break;
}
- putchar('"');
+ print_byte(h, '"');
}
/* Print out styles. */
@@ -593,7 +603,13 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
attr = "min-width";
break;
case '?':
- printf("%s: %s;", s, va_arg(ap, char *));
+ print_word(h, s);
+ print_byte(h, ':');
+ print_byte(h, ' ');
+ print_word(h, va_arg(ap, char *));
+ print_byte(h, ';');
+ if (*fmt != '\0')
+ print_byte(h, ' ');
continue;
default:
abort();
@@ -603,22 +619,30 @@ print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
v = 1.0;
else if (su->unit == SCALE_BU)
v /= 24.0;
- printf("%s: %.2f%s;", attr, v, roffscales[su->unit]);
+ print_word(h, attr);
+ print_byte(h, ':');
+ print_byte(h, ' ');
+ (void)snprintf(numbuf, sizeof(numbuf), "%.2f", v);
+ print_word(h, numbuf);
+ print_word(h, roffscales[su->unit]);
+ print_byte(h, ';');
+ if (*fmt != '\0')
+ print_byte(h, ' ');
}
if (have_style)
- putchar('"');
+ print_byte(h, '"');
va_end(ap);
/* Accommodate for "well-formed" singleton escaping. */
if (HTML_AUTOCLOSE & htmltags[tag].flags)
- putchar('/');
+ print_byte(h, '/');
- putchar('>');
+ print_byte(h, '>');
if (tflags & HTML_NLBEGIN)
- html_endline(h);
+ print_endline(h);
else
h->flags |= HTML_NOSPACE;
@@ -651,11 +675,14 @@ print_ctag(struct html *h, struct tag *tag)
if (tflags & HTML_NOINDENT)
h->noindent--;
if (tflags & HTML_NLEND)
- html_endline(h);
- html_indent(h);
- printf("</%s>", htmltags[tag->tag].name);
+ print_endline(h);
+ print_indent(h);
+ print_byte(h, '<');
+ print_byte(h, '/');
+ print_word(h, htmltags[tag->tag].name);
+ print_byte(h, '>');
if (tflags & HTML_NLAFTER)
- html_endline(h);
+ print_endline(h);
h->tags.head = tag->next;
free(tag);
@@ -664,21 +691,20 @@ print_ctag(struct html *h, struct tag *tag)
void
print_gen_decls(struct html *h)
{
-
- puts("<!DOCTYPE html>");
- h->flags |= HTML_NLDONE;
+ print_word(h, "<!DOCTYPE html>");
+ print_endline(h);
}
void
print_text(struct html *h, const char *word)
{
- if ((h->flags & (HTML_NLDONE | HTML_NOSPACE)) == 0) {
+ if (h->col && (h->flags & HTML_NOSPACE) == 0) {
if ( ! (HTML_KEEP & h->flags)) {
if (HTML_PREKEEP & h->flags)
h->flags |= HTML_KEEP;
- putchar(' ');
+ print_endword(h);
} else
- printf("&#160;");
+ print_word(h, "&#160;");
}
assert(NULL == h->metaf);
@@ -694,7 +720,7 @@ print_text(struct html *h, const char *word)
print_otag(h, TAG_I, "");
break;
default:
- html_indent(h);
+ print_indent(h);
break;
}
@@ -747,18 +773,85 @@ print_paragraph(struct html *h)
print_tagq(h, t);
}
+
+/***********************************************************************
+ * Low level output functions.
+ * They implement line breaking using a short static buffer.
+ ***********************************************************************/
+
+/*
+ * Buffer one HTML output byte.
+ * If the buffer is full, flush and deactivate it and start a new line.
+ * If the buffer is inactive, print directly.
+ */
+static void
+print_byte(struct html *h, char c)
+{
+ if ((h->flags & HTML_BUFFER) == 0) {
+ putchar(c);
+ h->col++;
+ return;
+ }
+
+ if (h->col + h->bufcol < sizeof(h->buf)) {
+ h->buf[h->bufcol++] = c;
+ return;
+ }
+
+ putchar('\n');
+ h->col = 0;
+ print_indent(h);
+ putchar(' ');
+ putchar(' ');
+ fwrite(h->buf, h->bufcol, 1, stdout);
+ putchar(c);
+ h->col = (h->indent + 1) * 2 + h->bufcol + 1;
+ h->bufcol = 0;
+ h->flags &= ~HTML_BUFFER;
+}
+
/*
* If something was printed on the current output line, end it.
- * Not to be called right after html_indent().
+ * Not to be called right after print_indent().
*/
static void
-html_endline(struct html *h)
+print_endline(struct html *h)
{
- if (h->flags & HTML_NLDONE)
+ if (h->col == 0)
return;
+ if (h->bufcol) {
+ putchar(' ');
+ fwrite(h->buf, h->bufcol, 1, stdout);
+ h->bufcol = 0;
+ }
putchar('\n');
- h->flags |= HTML_NLDONE | HTML_NOSPACE;
+ h->col = 0;
+ h->flags |= HTML_NOSPACE;
+ h->flags &= ~HTML_BUFFER;
+}
+
+/*
+ * Flush the HTML output buffer.
+ * If it is inactive, activate it.
+ */
+static void
+print_endword(struct html *h)
+{
+ if (h->noindent) {
+ print_byte(h, ' ');
+ return;
+ }
+
+ if ((h->flags & HTML_BUFFER) == 0) {
+ h->col++;
+ h->flags |= HTML_BUFFER;
+ } else if (h->bufcol) {
+ putchar(' ');
+ fwrite(h->buf, h->bufcol, 1, stdout);
+ h->col += h->bufcol + 1;
+ }
+ h->bufcol = 0;
}
/*
@@ -768,17 +861,30 @@ html_endline(struct html *h)
* but do not use print_otag() for producing it.
*/
static void
-html_indent(struct html *h)
+print_indent(struct html *h)
{
- int i;
+ size_t i;
- if ((h->flags & HTML_NLDONE) == 0)
+ if (h->col)
return;
- if (h->noindent == 0)
- for (i = 0; i < h->indent * 2; i++)
+ if (h->noindent == 0) {
+ h->col = h->indent * 2;
+ for (i = 0; i < h->col; i++)
putchar(' ');
- h->flags &= ~(HTML_NLDONE | HTML_NOSPACE);
+ }
+ h->flags &= ~HTML_NOSPACE;
+}
+
+/*
+ * Print or buffer some characters
+ * depending on the current HTML output buffer state.
+ */
+static void
+print_word(struct html *h, const char *cp)
+{
+ while (*cp != '\0')
+ print_byte(h, *cp++);
}
/*
generated by cgit v1.2.3-56-ge451 (git 2.39.0) at 2024-07-02 03:33:12 +0000