/* print out the start of an `img' or `a' tag, applying callbacks as needed.
*/
static void
printlinkyref(MMIOT *f, linkytype *tag, char *link, int size)
{
char *edit;
if ( f->flags & IS_LABEL )
return;
Qstring(tag->link_pfx, f);
if ( tag->kind & IS_URL ) {
if ( f->cb && f->cb->e_url && (edit = (*f->cb->e_url)(link, size, f->cb->e_data)) ) {
puturl(edit, strlen(edit), f, 0);
if ( f->cb->e_free ) (*f->cb->e_free)(edit, f->cb->e_data);
}
else
puturl(link + tag->szpat, size - tag->szpat, f, 0);
}
else
___mkd_reparse(link + tag->szpat, size - tag->szpat, MKD_TAGTEXT, f, 0);
Qstring(tag->link_sfx, f);
if ( f->cb && f->cb->e_flags && (edit = (*f->cb->e_flags)(link, size, f->cb->e_data)) ) {
Qchar(' ', f);
Qstring(edit, f);
if ( f->cb->e_free ) (*f->cb->e_free)(edit, f->cb->e_data);
}
} /* printlinkyref */
/* print out a linky (or fail if it's Not Allowed)
*/
static int
linkyformat(MMIOT *f, Cstring text, int image, Footnote *ref)
{
linkytype *tag;
if ( image )
tag = &imaget;
else if ( tag = pseudo(ref->link) ) {
if ( f->flags & (NO_PSEUDO_PROTO|SAFELINK) )
return 0;
}
else if ( (f->flags & SAFELINK) && T(ref->link)
&& (T(ref->link)[0] != '/')
&& !isautoprefix(T(ref->link)) )
/* if SAFELINK, only accept links that are local or
* a well-known protocol
*/
return 0;
else
tag = &linkt;
if ( f->flags & tag->flags )
return 0;
if ( tag->link_pfx ) {
Qstring(tag->link_pfx, f);
if ( tag->kind & IS_URL ) {
if ( f->base && T(ref->link) && (T(ref->link)[tag->szpat] == '/') )
puturl(f->base, strlen(f->base), f, 0);
puturl(T(ref->link) + tag->szpat, S(ref->link) - tag->szpat, f, 0);
}
else
___mkd_reparse(T(ref->link) + tag->szpat, S(ref->link) - tag->szpat, INSIDE_TAG, f);
Qstring(tag->link_sfx, f);
if ( tag->WxH && ref->height && ref->width ) {
Qprintf(f," height=\"%d\"", ref->height);
Qprintf(f, " width=\"%d\"", ref->width);
}
if ( S(ref->title) ) {
Qstring(" title=\"", f);
___mkd_reparse(T(ref->title), S(ref->title), INSIDE_TAG, f);
Qchar('"', f);
}
Qstring(tag->text_pfx, f);
___mkd_reparse(T(text), S(text), tag->flags, f);
Qstring(tag->text_sfx, f);
}
else
Qwrite(T(ref->link) + tag->szpat, S(ref->link) - tag->szpat, f);
return 1;
} /* linkyformat */
/*
* process embedded links and images
*/
static int
linkylinky(int image, MMIOT *f)
{
int start = mmiottell(f);
Footnote link;
linkytype *tag;
if ( !linkykey(image, &link, f) ) {
mmiotseek(f, start);
return 0;
}
if ( image )
tag = &imaget;
else if ( (f->flags & NO_PSEUDO_PROTO) || (tag = extratag(link.link)) == 0 )
tag = &linkt;
if ( f->flags & tag-> flags ) {
mmiotseek(f, start);
return 0;
}
if ( tag->link_pfx ) {
Qstring(tag->link_pfx, f);
if ( f->base && (T(link.link)[tag->szpat] == '/') )
puturl(f->base, strlen(f->base), f);
puturl(T(link.link) + tag->szpat, S(link.link) - tag->szpat, f);
Qstring(tag->link_sfx, f);
if ( tag->WxH && link.height && link.width ) {
Qprintf(f," height=\"%d\"", link.height);
Qprintf(f, " width=\"%d\"", link.width);
}
if ( S(link.title) ) {
Qstring(" title=\"", f);
reparse(T(link.title), S(link.title), INSIDE_TAG, f);
Qchar('"', f);
}
Qstring(tag->text_pfx, f);
reparse(T(link.tag), S(link.tag), tag->flags, f);
Qstring(tag->text_sfx, f);
}
else
Qwrite(T(link.link) + tag->szpat, S(link.link) - tag->szpat, f);
return 1;
}
/* The size-length token at cursor(f) is either a mailto:, an
* implicit mailto:, one of the approved url protocols, or just
* plain old text. If it's a mailto: or an approved protocol,
* linkify it, otherwise say "no"
*/
static int
process_possible_link(MMIOT *f, int size)
{
int address= 0;
int mailto = 0;
char *text = cursor(f);
if ( f->flags & DENY_A ) return 0;
if ( (size > 7) && strncasecmp(text, "mailto:", 7) == 0 ) {
/* if it says it's a mailto, it's a mailto -- who am
* I to second-guess the user?
*/
address = 1;
mailto = 7; /* 7 is the length of "mailto:"; we need this */
}
else
address = maybe_address(text, size);
if ( address ) {
Qstring("<a href=\"", f);
if ( !mailto ) {
/* supply a mailto: protocol if one wasn't attached */
mangle("mailto:", 7, f);
}
mangle(text, size, f);
Qstring("\">", f);
mangle(text+mailto, size-mailto, f);
Qstring("</a>", f);
return 1;
}
else if ( isautoprefix(text) ) {
Qstring("<a href=\"", f);
puturl(text,size,f, 0);
Qstring("\">", f);
puturl(text,size,f, 1);
Qstring("</a>", f);
return 1;
}
return 0;
} /* process_possible_link */
/* a < may be just a regular character, the start of an embedded html
* tag, or the start of an <automatic link>. If it's an automatic
* link, we also need to know if it's an email address because if it
* is we need to mangle it in our futile attempt to cut down on the
* spaminess of the rendered page.
*/
static int
maybe_tag_or_link(MMIOT *f)
{
char *text;
int c, size, i;
int maybetag=1, maybeaddress=0;
int mailto;
if ( f->flags & INSIDE_TAG )
return 0;
for ( size=0; ((c = peek(f,size+1)) != '>') && !isspace(c); size++ ) {
if ( ! (c == '/' || isalnum(c) || c == '~') )
maybetag=0;
if ( c == '@' )
maybeaddress=1;
else if ( c == EOF )
return 0;
}
if ( size == 0 )
return 0;
if ( maybetag || (size >= 3 && strncmp(cursor(f), "!--", 3) == 0) ) {
Qstring(forbidden_tag(f) ? "<" : "<", f);
while ( ((c = peek(f, 1)) != EOF) && (c != '>') )
cputc(pull(f), f);
return 1;
}
if ( f->flags & DENY_A ) return 0;
text = cursor(f);
shift(f, size+1);
for ( i=0; i < SZAUTOPREFIX; i++ )
if ( strncasecmp(text, autoprefix[i], strlen(autoprefix[i])) == 0 ) {
Qstring("<a href=\"", f);
puturl(text,size,f);
Qstring("\">", f);
puturl(text,size,f);
Qstring("</a>", f);
return 1;
}
if ( maybeaddress ) {
Qstring("<a href=\"", f);
if ( (size > 7) && strncasecmp(text, "mailto:", 7) == 0 )
mailto = 7;
else {
mailto = 0;
/* supply a mailto: protocol if one wasn't attached */
mangle("mailto:", 7, f);
}
mangle(text, size, f);
Qstring("\">", f);
mangle(text+mailto, size-mailto, f);
Qstring("</a>", f);
return 1;
}
shift(f, -(size+1));
return 0;
} /* maybe_tag_or_link */
