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1302 lines
25 KiB
1302 lines
25 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 "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <time.h>
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#include <ctype.h>
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#include "cstring.h"
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#include "markdown.h"
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#include "amalloc.h"
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#include "tags.h"
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typedef int (*stfu)(const void*,const void*);
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typedef ANCHOR(Paragraph) ParagraphRoot;
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static Paragraph *Pp(ParagraphRoot *, Line *, int);
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static Paragraph *compile(Line *, int, MMIOT *);
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/* case insensitive string sort for Footnote tags.
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*/
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int
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__mkd_footsort(Footnote *a, Footnote *b)
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{
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int i;
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char ac, bc;
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if ( S(a->tag) != S(b->tag) )
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return S(a->tag) - S(b->tag);
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for ( i=0; i < S(a->tag); i++) {
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ac = tolower(T(a->tag)[i]);
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bc = tolower(T(b->tag)[i]);
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if ( isspace(ac) && isspace(bc) )
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continue;
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if ( ac != bc )
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return ac - bc;
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}
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return 0;
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}
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/* find the first blank character after position <i>
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*/
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static int
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nextblank(Line *t, int i)
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{
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while ( (i < S(t->text)) && !isspace(T(t->text)[i]) )
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++i;
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return i;
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}
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/* find the next nonblank character after position <i>
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*/
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static int
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nextnonblank(Line *t, int i)
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{
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while ( (i < S(t->text)) && isspace(T(t->text)[i]) )
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++i;
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return i;
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}
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/* find the first nonblank character on the Line.
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*/
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int
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mkd_firstnonblank(Line *p)
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{
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return nextnonblank(p,0);
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}
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static inline int
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blankline(Line *p)
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{
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return ! (p && (S(p->text) > p->dle) );
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}
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static Line *
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skipempty(Line *p)
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{
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while ( p && (p->dle == S(p->text)) )
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p = p->next;
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return p;
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}
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void
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___mkd_tidy(Cstring *t)
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{
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while ( S(*t) && isspace(T(*t)[S(*t)-1]) )
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--S(*t);
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}
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static struct kw comment = { "!--", 3, 0 };
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static struct kw *
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isopentag(Line *p)
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{
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int i=0, len;
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char *line;
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if ( !p ) return 0;
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line = T(p->text);
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len = S(p->text);
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if ( len < 3 || line[0] != '<' )
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return 0;
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if ( line[1] == '!' && line[2] == '-' && line[3] == '-' )
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/* comments need special case handling, because
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* the !-- doesn't need to end in a whitespace
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*/
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return &comment;
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/* find how long the tag is so we can check to see if
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* it's a block-level tag
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*/
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for ( i=1; i < len && T(p->text)[i] != '>'
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&& T(p->text)[i] != '/'
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&& !isspace(T(p->text)[i]); ++i )
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;
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return mkd_search_tags(T(p->text)+1, i-1);
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}
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typedef struct _flo {
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Line *t;
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int i;
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} FLO;
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#define floindex(x) (x.i)
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static int
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flogetc(FLO *f)
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{
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if ( f && f->t ) {
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if ( f->i < S(f->t->text) )
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return T(f->t->text)[f->i++];
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f->t = f->t->next;
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f->i = 0;
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return flogetc(f);
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}
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return EOF;
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}
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static void
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splitline(Line *t, int cutpoint)
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{
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if ( t && (cutpoint < S(t->text)) ) {
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Line *tmp = calloc(1, sizeof *tmp);
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tmp->next = t->next;
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t->next = tmp;
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tmp->dle = t->dle;
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SUFFIX(tmp->text, T(t->text)+cutpoint, S(t->text)-cutpoint);
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S(t->text) = cutpoint;
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}
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}
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#define UNCHECK(l) ((l)->flags &= ~CHECKED)
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/*
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* walk a line, seeing if it's any of half a dozen interesting regular
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* types.
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*/
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static void
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checkline(Line *l)
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{
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int eol, i;
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int dashes = 0, spaces = 0,
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equals = 0, underscores = 0,
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stars = 0, tildes = 0;
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l->flags |= CHECKED;
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l->kind = chk_text;
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l->count = 0;
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if (l->dle >= 4) { l->kind=chk_code; return; }
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for ( eol = S(l->text); eol > l->dle && isspace(T(l->text)[eol-1]); --eol )
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;
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for (i=l->dle; i<eol; i++) {
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register int c = T(l->text)[i];
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if ( c != ' ' ) l->count++;
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switch (c) {
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case '-': dashes = 1; break;
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case ' ': spaces = 1; break;
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case '=': equals = 1; break;
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case '_': underscores = 1; break;
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case '*': stars = 1; break;
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case '~': tildes = 1; break;
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default: return;
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}
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}
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if ( dashes + equals + underscores + stars + tildes > 1 )
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return;
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if ( spaces ) {
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if ( (underscores || stars || dashes) )
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l->kind = chk_hr;
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return;
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}
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if ( stars || underscores ) { l->kind = chk_hr; }
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else if ( dashes ) { l->kind = chk_dash; }
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else if ( tildes ) { l->kind = chk_tilde; }
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else if ( equals ) { l->kind = chk_equal; }
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}
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static Line *
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commentblock(Paragraph *p, int *unclosed)
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{
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Line *t, *ret;
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char *end;
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for ( t = p->text; t ; t = t->next) {
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if ( end = strstr(T(t->text), "-->") ) {
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splitline(t, 3 + (end - T(t->text)) );
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ret = t->next;
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t->next = 0;
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return ret;
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}
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}
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*unclosed = 1;
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return t;
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}
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static Line *
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htmlblock(Paragraph *p, struct kw *tag, int *unclosed)
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{
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Line *ret;
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FLO f = { p->text, 0 };
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int c;
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int i, closing, depth=0;
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*unclosed = 0;
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if ( tag == &comment )
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return commentblock(p, unclosed);
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if ( tag->selfclose ) {
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ret = f.t->next;
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f.t->next = 0;
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return ret;
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}
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while ( (c = flogetc(&f)) != EOF ) {
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if ( c == '<' ) {
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/* tag? */
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c = flogetc(&f);
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if ( c == '!' ) { /* comment? */
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if ( flogetc(&f) == '-' && flogetc(&f) == '-' ) {
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/* yes */
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while ( (c = flogetc(&f)) != EOF ) {
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if ( c == '-' && flogetc(&f) == '-'
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&& flogetc(&f) == '>')
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/* consumed whole comment */
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break;
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}
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}
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}
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else {
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if ( closing = (c == '/') ) c = flogetc(&f);
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for ( i=0; i < tag->size; c=flogetc(&f) ) {
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if ( tag->id[i++] != toupper(c) )
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break;
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}
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if ( (i == tag->size) && !isalnum(c) ) {
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depth = depth + (closing ? -1 : 1);
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if ( depth == 0 ) {
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while ( c != EOF && c != '>' ) {
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/* consume trailing gunk in close tag */
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c = flogetc(&f);
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}
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if ( c == EOF )
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break;
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if ( !f.t )
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return 0;
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splitline(f.t, floindex(f));
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ret = f.t->next;
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f.t->next = 0;
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return ret;
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}
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}
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}
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}
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}
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*unclosed = 1;
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return 0;
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}
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/* footnotes look like ^<whitespace>{0,3}[stuff]: <content>$
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*/
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static int
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isfootnote(Line *t)
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{
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int i;
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if ( ( (i = t->dle) > 3) || (T(t->text)[i] != '[') )
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return 0;
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for ( ++i; i < S(t->text) ; ++i ) {
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if ( T(t->text)[i] == '[' )
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return 0;
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else if ( T(t->text)[i] == ']' )
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return ( T(t->text)[i+1] == ':' ) ;
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}
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return 0;
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}
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static inline int
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isquote(Line *t)
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{
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return (t->dle < 4 && T(t->text)[t->dle] == '>');
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}
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static inline int
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iscode(Line *t)
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{
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return (t->dle >= 4);
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}
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static inline int
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ishr(Line *t)
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{
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if ( ! (t->flags & CHECKED) )
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checkline(t);
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if ( t->count > 2 )
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return t->kind == chk_hr || t->kind == chk_dash || t->kind == chk_equal;
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return 0;
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}
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static int
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issetext(Line *t, int *htyp)
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{
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Line *n;
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/* check for setext-style HEADER
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* ======
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*/
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if ( (n = t->next) ) {
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if ( !(n->flags & CHECKED) )
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checkline(n);
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if ( n->kind == chk_dash || n->kind == chk_equal ) {
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*htyp = SETEXT;
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return 1;
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}
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}
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return 0;
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}
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static int
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ishdr(Line *t, int *htyp)
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{
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/* ANY leading `#`'s make this into an ETX header
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*/
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if ( (t->dle == 0) && (S(t->text) > 1) && (T(t->text)[0] == '#') ) {
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*htyp = ETX;
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return 1;
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}
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/* And if not, maybe it's a SETEXT header instead
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*/
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return issetext(t, htyp);
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}
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static inline int
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end_of_block(Line *t)
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{
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int dummy;
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if ( !t )
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return 0;
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return ( (S(t->text) <= t->dle) || ishr(t) || ishdr(t, &dummy) );
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}
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static Line*
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is_discount_dt(Line *t, int *clip)
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{
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#if USE_DISCOUNT_DL
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if ( t && t->next
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&& (S(t->text) > 2)
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&& (t->dle == 0)
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&& (T(t->text)[0] == '=')
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&& (T(t->text)[S(t->text)-1] == '=') ) {
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if ( t->next->dle >= 4 ) {
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*clip = 4;
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return t;
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}
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else
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return is_discount_dt(t->next, clip);
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}
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#endif
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return 0;
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}
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static int
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is_extra_dd(Line *t)
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{
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return (t->dle < 4) && (T(t->text)[t->dle] == ':')
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&& isspace(T(t->text)[t->dle+1]);
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}
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static Line*
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is_extra_dt(Line *t, int *clip)
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{
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#if USE_EXTRA_DL
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if ( t && t->next && T(t->text)[0] != '='
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&& T(t->text)[S(t->text)-1] != '=') {
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Line *x;
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if ( iscode(t) || end_of_block(t) )
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return 0;
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if ( (x = skipempty(t->next)) && is_extra_dd(x) ) {
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*clip = x->dle+2;
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return t;
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}
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if ( x=is_extra_dt(t->next, clip) )
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return x;
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}
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#endif
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return 0;
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}
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static Line*
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isdefinition(Line *t, int *clip, int *kind)
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{
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Line *ret;
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*kind = 1;
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if ( ret = is_discount_dt(t,clip) )
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return ret;
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*kind=2;
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return is_extra_dt(t,clip);
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}
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static int
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islist(Line *t, int *clip, DWORD flags, int *list_type)
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{
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int i, j;
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char *q;
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if ( end_of_block(t) )
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return 0;
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if ( !(flags & (MKD_NODLIST|MKD_STRICT)) && isdefinition(t,clip,list_type) )
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return DL;
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if ( strchr("*-+", T(t->text)[t->dle]) && isspace(T(t->text)[t->dle+1]) ) {
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i = nextnonblank(t, t->dle+1);
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*clip = (i > 4) ? 4 : i;
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*list_type = UL;
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return AL;
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}
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if ( (j = nextblank(t,t->dle)) > t->dle ) {
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if ( T(t->text)[j-1] == '.' ) {
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if ( !(flags & (MKD_NOALPHALIST|MKD_STRICT))
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&& (j == t->dle + 2)
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&& isalpha(T(t->text)[t->dle]) ) {
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j = nextnonblank(t,j);
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*clip = (j > 4) ? 4 : j;
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*list_type = AL;
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return AL;
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}
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strtoul(T(t->text)+t->dle, &q, 10);
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if ( (q > T(t->text)+t->dle) && (q == T(t->text) + (j-1)) ) {
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j = nextnonblank(t,j);
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*clip = (j > 4) ? 4 : j;
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*list_type = OL;
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return AL;
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}
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}
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}
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return 0;
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}
|
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|
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|
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static Line *
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headerblock(Paragraph *pp, int htyp)
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{
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Line *ret = 0;
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Line *p = pp->text;
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int i, j;
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switch (htyp) {
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case SETEXT:
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/* p->text is header, p->next->text is -'s or ='s
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*/
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pp->hnumber = (T(p->next->text)[0] == '=') ? 1 : 2;
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ret = p->next->next;
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___mkd_freeLine(p->next);
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p->next = 0;
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break;
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case ETX:
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/* p->text is ###header###, so we need to trim off
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* the leading and trailing `#`'s
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*/
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for (i=0; (T(p->text)[i] == T(p->text)[0]) && (i < S(p->text)-1)
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&& (i < 6); i++)
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;
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pp->hnumber = i;
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while ( (i < S(p->text)) && isspace(T(p->text)[i]) )
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++i;
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CLIP(p->text, 0, i);
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UNCHECK(p);
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for (j=S(p->text); (j > 1) && (T(p->text)[j-1] == '#'); --j)
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;
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while ( j && isspace(T(p->text)[j-1]) )
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--j;
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S(p->text) = j;
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ret = p->next;
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p->next = 0;
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break;
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}
|
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return ret;
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}
|
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|
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|
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static Line *
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codeblock(Paragraph *p)
|
|
{
|
|
Line *t = p->text, *r;
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|
|
for ( ; t; t = r ) {
|
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CLIP(t->text,0,4);
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t->dle = mkd_firstnonblank(t);
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|
|
if ( !( (r = skipempty(t->next)) && iscode(r)) ) {
|
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___mkd_freeLineRange(t,r);
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t->next = 0;
|
|
return r;
|
|
}
|
|
}
|
|
return t;
|
|
}
|
|
|
|
|
|
#ifdef WITH_FENCED_CODE
|
|
static int
|
|
iscodefence(Line *r, int size)
|
|
{
|
|
if ( !(r->flags & CHECKED) )
|
|
checkline(r);
|
|
|
|
return (r->kind == chk_tilde) && (r->count >= size);
|
|
}
|
|
|
|
static Paragraph *
|
|
fencedcodeblock(ParagraphRoot *d, Line **ptr)
|
|
{
|
|
Line *first, *r;
|
|
Paragraph *ret;
|
|
|
|
first = (*ptr);
|
|
|
|
/* don't allow zero-length code fences
|
|
*/
|
|
if ( (first->next == 0) || iscodefence(first->next, first->count) )
|
|
return 0;
|
|
|
|
/* find the closing fence, discard the fences,
|
|
* return a Paragraph with the contents
|
|
*/
|
|
for ( r = first; r && r->next; r = r->next )
|
|
if ( iscodefence(r->next, first->count) ) {
|
|
(*ptr) = r->next->next;
|
|
ret = Pp(d, first->next, CODE);
|
|
___mkd_freeLine(first);
|
|
___mkd_freeLine(r->next);
|
|
r->next = 0;
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
static int
|
|
centered(Line *first, Line *last)
|
|
{
|
|
|
|
if ( first&&last ) {
|
|
int len = S(last->text);
|
|
|
|
if ( (len > 2) && (strncmp(T(first->text), "->", 2) == 0)
|
|
&& (strncmp(T(last->text)+len-2, "<-", 2) == 0) ) {
|
|
CLIP(first->text, 0, 2);
|
|
S(last->text) -= 2;
|
|
return CENTER;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
endoftextblock(Line *t, int toplevelblock, DWORD flags)
|
|
{
|
|
int z;
|
|
|
|
if ( end_of_block(t) || isquote(t) )
|
|
return 1;
|
|
|
|
/* HORRIBLE STANDARDS KLUDGES:
|
|
* 1. non-toplevel paragraphs absorb adjacent code blocks
|
|
* 2. Toplevel paragraphs eat absorb adjacent list items,
|
|
* but sublevel blocks behave properly.
|
|
* (What this means is that we only need to check for code
|
|
* blocks at toplevel, and only check for list items at
|
|
* nested levels.)
|
|
*/
|
|
return toplevelblock ? 0 : islist(t,&z,flags,&z);
|
|
}
|
|
|
|
|
|
static Line *
|
|
textblock(Paragraph *p, int toplevel, DWORD flags)
|
|
{
|
|
Line *t, *next;
|
|
|
|
for ( t = p->text; t ; t = next ) {
|
|
if ( ((next = t->next) == 0) || endoftextblock(next, toplevel, flags) ) {
|
|
p->align = centered(p->text, t);
|
|
t->next = 0;
|
|
return next;
|
|
}
|
|
}
|
|
return t;
|
|
}
|
|
|
|
|
|
/* length of the id: or class: kind in a special div-not-quote block
|
|
*/
|
|
static int
|
|
szmarkerclass(char *p)
|
|
{
|
|
if ( strncasecmp(p, "id:", 3) == 0 )
|
|
return 3;
|
|
if ( strncasecmp(p, "class:", 6) == 0 )
|
|
return 6;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* check if the first line of a quoted block is the special div-not-quote
|
|
* marker %[kind:]name%
|
|
*/
|
|
#define iscsschar(c) (isalpha(c) || (c == '-') || (c == '_') )
|
|
|
|
static int
|
|
isdivmarker(Line *p, int start, DWORD flags)
|
|
{
|
|
char *s;
|
|
int last, i;
|
|
|
|
if ( flags & (MKD_NODIVQUOTE|MKD_STRICT) )
|
|
return 0;
|
|
|
|
last= S(p->text) - (1 + start);
|
|
s = T(p->text) + start;
|
|
|
|
if ( (last <= 0) || (*s != '%') || (s[last] != '%') )
|
|
return 0;
|
|
|
|
i = szmarkerclass(s+1);
|
|
|
|
if ( !iscsschar(s[i+1]) )
|
|
return 0;
|
|
while ( ++i < last )
|
|
if ( !(isdigit(s[i]) || iscsschar(s[i])) )
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* accumulate a blockquote.
|
|
*
|
|
* one sick horrible thing about blockquotes is that even though
|
|
* it just takes ^> to start a quote, following lines, if quoted,
|
|
* assume that the prefix is ``> ''. This means that code needs
|
|
* to be indented *5* spaces from the leading '>', but *4* spaces
|
|
* from the start of the line. This does not appear to be
|
|
* documented in the reference implementation, but it's the
|
|
* way the markdown sample web form at Daring Fireball works.
|
|
*/
|
|
static Line *
|
|
quoteblock(Paragraph *p, DWORD flags)
|
|
{
|
|
Line *t, *q;
|
|
int qp;
|
|
|
|
for ( t = p->text; t ; t = q ) {
|
|
if ( isquote(t) ) {
|
|
/* clip leading spaces */
|
|
for (qp = 0; T(t->text)[qp] != '>'; qp ++)
|
|
/* assert: the first nonblank character on this line
|
|
* will be a >
|
|
*/;
|
|
/* clip '>' */
|
|
qp++;
|
|
/* clip next space, if any */
|
|
if ( T(t->text)[qp] == ' ' )
|
|
qp++;
|
|
CLIP(t->text, 0, qp);
|
|
UNCHECK(t);
|
|
t->dle = mkd_firstnonblank(t);
|
|
}
|
|
|
|
q = skipempty(t->next);
|
|
|
|
if ( (q == 0) || ((q != t->next) && (!isquote(q) || isdivmarker(q,1,flags))) ) {
|
|
___mkd_freeLineRange(t, q);
|
|
t = q;
|
|
break;
|
|
}
|
|
}
|
|
if ( isdivmarker(p->text,0,flags) ) {
|
|
char *prefix = "class";
|
|
int i;
|
|
|
|
q = p->text;
|
|
p->text = p->text->next;
|
|
|
|
if ( (i = szmarkerclass(1+T(q->text))) == 3 )
|
|
/* and this would be an "%id:" prefix */
|
|
prefix="id";
|
|
|
|
if ( p->ident = malloc(4+strlen(prefix)+S(q->text)) )
|
|
sprintf(p->ident, "%s=\"%.*s\"", prefix, S(q->text)-(i+2),
|
|
T(q->text)+(i+1) );
|
|
|
|
___mkd_freeLine(q);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
|
|
typedef int (*linefn)(Line *);
|
|
|
|
|
|
/*
|
|
* pull in a list block. A list block starts with a list marker and
|
|
* runs until the next list marker, the next non-indented paragraph,
|
|
* or EOF. You do not have to indent nonblank lines after the list
|
|
* marker, but multiple paragraphs need to start with a 4-space indent.
|
|
*/
|
|
static Line *
|
|
listitem(Paragraph *p, int indent, DWORD flags, linefn check)
|
|
{
|
|
Line *t, *q;
|
|
int clip = indent;
|
|
int z;
|
|
|
|
for ( t = p->text; t ; t = q) {
|
|
CLIP(t->text, 0, clip);
|
|
UNCHECK(t);
|
|
t->dle = mkd_firstnonblank(t);
|
|
|
|
if ( (q = skipempty(t->next)) == 0 ) {
|
|
___mkd_freeLineRange(t,q);
|
|
return 0;
|
|
}
|
|
|
|
/* after a blank line, the next block needs to start with a line
|
|
* that's indented 4(? -- reference implementation allows a 1
|
|
* character indent, but that has unfortunate side effects here)
|
|
* spaces, but after that the line doesn't need any indentation
|
|
*/
|
|
if ( q != t->next ) {
|
|
if (q->dle < indent) {
|
|
q = t->next;
|
|
t->next = 0;
|
|
return q;
|
|
}
|
|
/* indent at least 2, and at most as
|
|
* as far as the initial line was indented. */
|
|
indent = clip ? clip : 2;
|
|
}
|
|
|
|
if ( (q->dle < indent) && (ishr(q) || islist(q,&z,flags,&z)
|
|
|| (check && (*check)(q)))
|
|
&& !issetext(q,&z) ) {
|
|
q = t->next;
|
|
t->next = 0;
|
|
return q;
|
|
}
|
|
|
|
clip = (q->dle > indent) ? indent : q->dle;
|
|
}
|
|
return t;
|
|
}
|
|
|
|
|
|
static Line *
|
|
definition_block(Paragraph *top, int clip, MMIOT *f, int kind)
|
|
{
|
|
ParagraphRoot d = { 0, 0 };
|
|
Paragraph *p;
|
|
Line *q = top->text, *text = 0, *labels;
|
|
int z, para;
|
|
|
|
while (( labels = q )) {
|
|
|
|
if ( (q = isdefinition(labels, &z, &kind)) == 0 )
|
|
break;
|
|
|
|
if ( (text = skipempty(q->next)) == 0 )
|
|
break;
|
|
|
|
if (( para = (text != q->next) ))
|
|
___mkd_freeLineRange(q, text);
|
|
|
|
q->next = 0;
|
|
if ( kind == 1 /* discount dl */ )
|
|
for ( q = labels; q; q = q->next ) {
|
|
CLIP(q->text, 0, 1);
|
|
UNCHECK(q);
|
|
S(q->text)--;
|
|
}
|
|
|
|
dd_block:
|
|
p = Pp(&d, text, LISTITEM);
|
|
|
|
text = listitem(p, clip, f->flags, (kind==2) ? is_extra_dd : 0);
|
|
p->down = compile(p->text, 0, f);
|
|
p->text = labels; labels = 0;
|
|
|
|
if ( para && p->down ) p->down->align = PARA;
|
|
|
|
if ( (q = skipempty(text)) == 0 )
|
|
break;
|
|
|
|
if (( para = (q != text) )) {
|
|
Line anchor;
|
|
|
|
anchor.next = text;
|
|
___mkd_freeLineRange(&anchor,q);
|
|
text = q;
|
|
|
|
}
|
|
|
|
if ( kind == 2 && is_extra_dd(q) )
|
|
goto dd_block;
|
|
}
|
|
top->text = 0;
|
|
top->down = T(d);
|
|
return text;
|
|
}
|
|
|
|
|
|
static Line *
|
|
enumerated_block(Paragraph *top, int clip, MMIOT *f, int list_class)
|
|
{
|
|
ParagraphRoot d = { 0, 0 };
|
|
Paragraph *p;
|
|
Line *q = top->text, *text;
|
|
int para = 0, z;
|
|
|
|
while (( text = q )) {
|
|
|
|
p = Pp(&d, text, LISTITEM);
|
|
text = listitem(p, clip, f->flags, 0);
|
|
|
|
p->down = compile(p->text, 0, f);
|
|
p->text = 0;
|
|
|
|
if ( para && p->down ) p->down->align = PARA;
|
|
|
|
if ( (q = skipempty(text)) == 0
|
|
|| islist(q, &clip, f->flags, &z) != list_class )
|
|
break;
|
|
|
|
if ( para = (q != text) ) {
|
|
Line anchor;
|
|
|
|
anchor.next = text;
|
|
___mkd_freeLineRange(&anchor, q);
|
|
|
|
if ( p->down ) p->down->align = PARA;
|
|
}
|
|
}
|
|
top->text = 0;
|
|
top->down = T(d);
|
|
return text;
|
|
}
|
|
|
|
|
|
static int
|
|
tgood(char c)
|
|
{
|
|
switch (c) {
|
|
case '\'':
|
|
case '"': return c;
|
|
case '(': return ')';
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* add a new (image or link) footnote to the footnote table
|
|
*/
|
|
static Line*
|
|
addfootnote(Line *p, MMIOT* f)
|
|
{
|
|
int j, i;
|
|
int c;
|
|
Line *np = p->next;
|
|
|
|
Footnote *foot = &EXPAND(*f->footnotes);
|
|
|
|
CREATE(foot->tag);
|
|
CREATE(foot->link);
|
|
CREATE(foot->title);
|
|
foot->flags = foot->height = foot->width = 0;
|
|
|
|
for (j=i=p->dle+1; T(p->text)[j] != ']'; j++)
|
|
EXPAND(foot->tag) = T(p->text)[j];
|
|
|
|
EXPAND(foot->tag) = 0;
|
|
S(foot->tag)--;
|
|
j = nextnonblank(p, j+2);
|
|
|
|
if ( (f->flags & MKD_EXTRA_FOOTNOTE) && (T(foot->tag)[0] == '^') ) {
|
|
while ( j < S(p->text) )
|
|
EXPAND(foot->title) = T(p->text)[j++];
|
|
goto skip_to_end;
|
|
}
|
|
|
|
while ( (j < S(p->text)) && !isspace(T(p->text)[j]) )
|
|
EXPAND(foot->link) = T(p->text)[j++];
|
|
EXPAND(foot->link) = 0;
|
|
S(foot->link)--;
|
|
j = nextnonblank(p,j);
|
|
|
|
if ( T(p->text)[j] == '=' ) {
|
|
sscanf(T(p->text)+j, "=%dx%d", &foot->width, &foot->height);
|
|
while ( (j < S(p->text)) && !isspace(T(p->text)[j]) )
|
|
++j;
|
|
j = nextnonblank(p,j);
|
|
}
|
|
|
|
|
|
if ( (j >= S(p->text)) && np && np->dle && tgood(T(np->text)[np->dle]) ) {
|
|
___mkd_freeLine(p);
|
|
p = np;
|
|
np = p->next;
|
|
j = p->dle;
|
|
}
|
|
|
|
if ( (c = tgood(T(p->text)[j])) ) {
|
|
/* Try to take the rest of the line as a comment; read to
|
|
* EOL, then shrink the string back to before the final
|
|
* quote.
|
|
*/
|
|
++j; /* skip leading quote */
|
|
|
|
while ( j < S(p->text) )
|
|
EXPAND(foot->title) = T(p->text)[j++];
|
|
|
|
while ( S(foot->title) && T(foot->title)[S(foot->title)-1] != c )
|
|
--S(foot->title);
|
|
if ( S(foot->title) ) /* skip trailing quote */
|
|
--S(foot->title);
|
|
EXPAND(foot->title) = 0;
|
|
--S(foot->title);
|
|
}
|
|
|
|
skip_to_end:
|
|
___mkd_freeLine(p);
|
|
return np;
|
|
}
|
|
|
|
|
|
/*
|
|
* allocate a paragraph header, link it to the
|
|
* tail of the current document
|
|
*/
|
|
static Paragraph *
|
|
Pp(ParagraphRoot *d, Line *ptr, int typ)
|
|
{
|
|
Paragraph *ret = calloc(sizeof *ret, 1);
|
|
|
|
ret->text = ptr;
|
|
ret->typ = typ;
|
|
|
|
return ATTACH(*d, ret);
|
|
}
|
|
|
|
|
|
|
|
static Line*
|
|
consume(Line *ptr, int *eaten)
|
|
{
|
|
Line *next;
|
|
int blanks=0;
|
|
|
|
for (; ptr && blankline(ptr); ptr = next, blanks++ ) {
|
|
next = ptr->next;
|
|
___mkd_freeLine(ptr);
|
|
}
|
|
if ( ptr ) *eaten = blanks;
|
|
return ptr;
|
|
}
|
|
|
|
|
|
/*
|
|
* top-level compilation; break the document into
|
|
* style, html, and source blocks with footnote links
|
|
* weeded out.
|
|
*/
|
|
static Paragraph *
|
|
compile_document(Line *ptr, MMIOT *f)
|
|
{
|
|
ParagraphRoot d = { 0, 0 };
|
|
ANCHOR(Line) source = { 0, 0 };
|
|
Paragraph *p = 0;
|
|
struct kw *tag;
|
|
int eaten, unclosed;
|
|
|
|
while ( ptr ) {
|
|
if ( !(f->flags & MKD_NOHTML) && (tag = isopentag(ptr)) ) {
|
|
/* If we encounter a html/style block, compile and save all
|
|
* of the cached source BEFORE processing the html/style.
|
|
*/
|
|
if ( T(source) ) {
|
|
E(source)->next = 0;
|
|
p = Pp(&d, 0, SOURCE);
|
|
p->down = compile(T(source), 1, f);
|
|
T(source) = E(source) = 0;
|
|
}
|
|
p = Pp(&d, ptr, strcmp(tag->id, "STYLE") == 0 ? STYLE : HTML);
|
|
ptr = htmlblock(p, tag, &unclosed);
|
|
if ( unclosed ) {
|
|
p->typ = SOURCE;
|
|
p->down = compile(p->text, 1, f);
|
|
p->text = 0;
|
|
}
|
|
}
|
|
else if ( isfootnote(ptr) ) {
|
|
/* footnotes, like cats, sleep anywhere; pull them
|
|
* out of the input stream and file them away for
|
|
* later processing
|
|
*/
|
|
ptr = consume(addfootnote(ptr, f), &eaten);
|
|
}
|
|
else {
|
|
/* source; cache it up to wait for eof or the
|
|
* next html/style block
|
|
*/
|
|
ATTACH(source,ptr);
|
|
ptr = ptr->next;
|
|
}
|
|
}
|
|
if ( T(source) ) {
|
|
/* if there's any cached source at EOF, compile
|
|
* it now.
|
|
*/
|
|
E(source)->next = 0;
|
|
p = Pp(&d, 0, SOURCE);
|
|
p->down = compile(T(source), 1, f);
|
|
}
|
|
return T(d);
|
|
}
|
|
|
|
|
|
static int
|
|
first_nonblank_before(Line *j, int dle)
|
|
{
|
|
return (j->dle < dle) ? j->dle : dle;
|
|
}
|
|
|
|
|
|
static int
|
|
actually_a_table(MMIOT *f, Line *pp)
|
|
{
|
|
Line *r;
|
|
int j;
|
|
int c;
|
|
|
|
/* tables need to be turned on */
|
|
if ( f->flags & (MKD_STRICT|MKD_NOTABLES) )
|
|
return 0;
|
|
|
|
/* tables need three lines */
|
|
if ( !(pp && pp->next && pp->next->next) ) {
|
|
return 0;
|
|
}
|
|
|
|
/* all lines must contain |'s */
|
|
for (r = pp; r; r = r->next )
|
|
if ( !(r->flags & PIPECHAR) ) {
|
|
return 0;
|
|
}
|
|
|
|
/* if the header has a leading |, all lines must have leading |'s */
|
|
if ( T(pp->text)[pp->dle] == '|' ) {
|
|
for ( r = pp; r; r = r->next )
|
|
if ( T(r->text)[first_nonblank_before(r,pp->dle)] != '|' ) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* second line must be only whitespace, -, |, or : */
|
|
r = pp->next;
|
|
|
|
for ( j=r->dle; j < S(r->text); ++j ) {
|
|
c = T(r->text)[j];
|
|
|
|
if ( !(isspace(c)||(c=='-')||(c==':')||(c=='|')) ) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* break a collection of markdown input into
|
|
* blocks of lists, code, html, and text to
|
|
* be marked up.
|
|
*/
|
|
static Paragraph *
|
|
compile(Line *ptr, int toplevel, MMIOT *f)
|
|
{
|
|
ParagraphRoot d = { 0, 0 };
|
|
Paragraph *p = 0;
|
|
Line *r;
|
|
int para = toplevel;
|
|
int blocks = 0;
|
|
int hdr_type, list_type, list_class, indent;
|
|
|
|
ptr = consume(ptr, ¶);
|
|
|
|
while ( ptr ) {
|
|
if ( iscode(ptr) ) {
|
|
p = Pp(&d, ptr, CODE);
|
|
|
|
if ( f->flags & MKD_1_COMPAT) {
|
|
/* HORRIBLE STANDARDS KLUDGE: the first line of every block
|
|
* has trailing whitespace trimmed off.
|
|
*/
|
|
___mkd_tidy(&p->text->text);
|
|
}
|
|
|
|
ptr = codeblock(p);
|
|
}
|
|
#if WITH_FENCED_CODE
|
|
else if ( iscodefence(ptr,3) && (p=fencedcodeblock(&d, &ptr)) )
|
|
/* yay, it's already done */ ;
|
|
#endif
|
|
else if ( ishr(ptr) ) {
|
|
p = Pp(&d, 0, HR);
|
|
r = ptr;
|
|
ptr = ptr->next;
|
|
___mkd_freeLine(r);
|
|
}
|
|
else if (( list_class = islist(ptr, &indent, f->flags, &list_type) )) {
|
|
if ( list_class == DL ) {
|
|
p = Pp(&d, ptr, DL);
|
|
ptr = definition_block(p, indent, f, list_type);
|
|
}
|
|
else {
|
|
p = Pp(&d, ptr, list_type);
|
|
ptr = enumerated_block(p, indent, f, list_class);
|
|
}
|
|
}
|
|
else if ( isquote(ptr) ) {
|
|
p = Pp(&d, ptr, QUOTE);
|
|
ptr = quoteblock(p, f->flags);
|
|
p->down = compile(p->text, 1, f);
|
|
p->text = 0;
|
|
}
|
|
else if ( ishdr(ptr, &hdr_type) ) {
|
|
p = Pp(&d, ptr, HDR);
|
|
ptr = headerblock(p, hdr_type);
|
|
}
|
|
else {
|
|
p = Pp(&d, ptr, MARKUP);
|
|
ptr = textblock(p, toplevel, f->flags);
|
|
/* tables are a special kind of paragraph */
|
|
if ( actually_a_table(f, p->text) )
|
|
p->typ = TABLE;
|
|
}
|
|
|
|
if ( (para||toplevel) && !p->align )
|
|
p->align = PARA;
|
|
|
|
blocks++;
|
|
para = toplevel || (blocks > 1);
|
|
ptr = consume(ptr, ¶);
|
|
|
|
if ( para && !p->align )
|
|
p->align = PARA;
|
|
|
|
}
|
|
return T(d);
|
|
}
|
|
|
|
|
|
/*
|
|
* the guts of the markdown() function, ripped out so I can do
|
|
* debugging.
|
|
*/
|
|
|
|
/*
|
|
* prepare and compile `text`, returning a Paragraph tree.
|
|
*/
|
|
int
|
|
mkd_compile(Document *doc, DWORD flags)
|
|
{
|
|
if ( !doc )
|
|
return 0;
|
|
|
|
if ( doc->compiled )
|
|
return 1;
|
|
|
|
doc->compiled = 1;
|
|
memset(doc->ctx, 0, sizeof(MMIOT) );
|
|
doc->ctx->ref_prefix= doc->ref_prefix;
|
|
doc->ctx->cb = &(doc->cb);
|
|
doc->ctx->flags = flags & USER_FLAGS;
|
|
CREATE(doc->ctx->in);
|
|
doc->ctx->footnotes = malloc(sizeof doc->ctx->footnotes[0]);
|
|
CREATE(*doc->ctx->footnotes);
|
|
|
|
mkd_initialize();
|
|
|
|
doc->code = compile_document(T(doc->content), doc->ctx);
|
|
qsort(T(*doc->ctx->footnotes), S(*doc->ctx->footnotes),
|
|
sizeof T(*doc->ctx->footnotes)[0],
|
|
(stfu)__mkd_footsort);
|
|
memset(&doc->content, 0, sizeof doc->content);
|
|
return 1;
|
|
}
|
|
|