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/* markdown: a C implementation of John Gruber's Markdown markup language.
*
* Copyright (C) 2007 David L Parsons.
* The redistribution terms are provided in the COPYRIGHT file that must
* be distributed with this source code.
*/
#include <stdio.h>
#include "markdown.h"
#include "cstring.h"
#include "amalloc.h"
struct frame {
int indent;
char c;
};
typedef STRING(struct frame) Stack;
static char *
Pptype(int typ)
{
switch (typ) {
case WHITESPACE: return "whitespace";
case CODE : return "code";
case QUOTE : return "quote";
case MARKUP : return "markup";
case HTML : return "html";
case DL : return "dl";
case UL : return "ul";
case OL : return "ol";
case LISTITEM : return "item";
case HDR : return "header";
case HR : return "HR";
default : return "mystery node!";
}
}
static void
pushpfx(int indent, char c, Stack *sp)
{
struct frame *q = &EXPAND(*sp);
q->indent = indent;
q->c = c;
}
static void
poppfx(Stack *sp)
{
S(*sp)--;
}
static void
changepfx(Stack *sp, char c)
{
char ch;
if ( !S(*sp) ) return;
ch = T(*sp)[S(*sp)-1].c;
if ( ch == '+' || ch == '|' )
T(*sp)[S(*sp)-1].c = c;
}
static void
printpfx(Stack *sp, FILE *f)
{
int i;
char c;
if ( !S(*sp) ) return;
c = T(*sp)[S(*sp)-1].c;
if ( c == '+' || c == '-' ) {
fprintf(f, "--%c", c);
T(*sp)[S(*sp)-1].c = (c == '-') ? ' ' : '|';
}
else
for ( i=0; i < S(*sp); i++ ) {
if ( i )
fprintf(f, " ");
fprintf(f, "%*s%c", T(*sp)[i].indent + 2, " ", T(*sp)[i].c);
if ( T(*sp)[i].c == '`' )
T(*sp)[i].c = ' ';
}
fprintf(f, "--");
}
static void
dumptree(Paragraph *pp, Stack *sp, FILE *f)
{
int count;
Line *p;
int d;
static char *Begin[] = { 0, "P", "center" };
while ( pp ) {
if ( !pp->next )
changepfx(sp, '`');
printpfx(sp, f);
d = fprintf(f, "[%s", Pptype(pp->typ));
if ( pp->align )
d += fprintf(f, ", <%s>", Begin[pp->align]);
for (count=0, p=pp->text; p; ++count, (p = p->next) )
;
if ( count )
d += fprintf(f, ", %d line%s", count, (count==1)?"":"s");
d += fprintf(f, "]");
if ( pp->down ) {
pushpfx(d, pp->down->next ? '+' : '-', sp);
dumptree(pp->down, sp, f);
poppfx(sp);
}
else fputc('\n', f);
pp = pp->next;
}
}
int
mkd_dump(Document *doc, FILE *out, int flags, char *title)
{
Stack stack;
if (mkd_compile(doc, flags) ) {
CREATE(stack);
pushpfx(fprintf(out, "%s", title), doc->code->next ? '+' : '-', &stack);
dumptree(doc->code, &stack, out);
DELETE(stack);
mkd_cleanup(doc);
return 0;
}
return -1;
}
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