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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";
case TABLE:
return "table";
case SOURCE:
return "source";
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->ident)
d += fprintf(f, " %s", pp->ident);
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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