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