Fossil

#if INTERFACE
/*
** Allowed wiki transformation operations
*/
#define WIKI_NOFOLLOW       0x001
#define WIKI_HTML           0x002
#define WIKI_INLINE         0x004  /* Do not surround with <p>..</p> */
#define WIKI_NOBLOCK        0x008  /* No block markup of any kind */
#endif


/*
** These are the only markup attributes allowed.
*/
#define ATTR_ALIGN              0x0000001

#define MUTYPE_HYPERLINK   0x0400   /* <a> */

/*
** These markup types must have an end tag.
*/
#define MUTYPE_STACK  (MUTYPE_BLOCK | MUTYPE_FONT | MUTYPE_LIST | MUTYPE_TABLE)

/*
** This markup types are allowed for "inline" text.
*/
#define MUTYPE_INLINE (MUTYPE_FONT | MUTYPE_HYPERLINK)

static const struct AllowedMarkup {
  const char *zName;       /* Name of the markup */
  char iCode;              /* The MARKUP_* code */
  short int iType;         /* The MUTYPE_* code */
  int allowedAttr;         /* Allowed attributes on this markup */
} aMarkup[] = {
 { 0,               MARKUP_INVALID,      0,                    0  },

#define TOKEN_ENUM          7    /*  "  \(?\d+[.)]?  " */
#define TOKEN_INDENT        8    /*  "   " */
#define TOKEN_TEXT          9    /* None of the above */

/*
** State flags
*/
#define AT_NEWLINE          0x001  /* At start of a line */
#define AT_PARAGRAPH        0x002  /* At start of a paragraph */
#define ALLOW_WIKI          0x004  /* Allow wiki markup */
#define FONT_MARKUP_ONLY    0x008  /* Only allow MUTYPE_FONT markup */
#define INLINE_MARKUP_ONLY  0x010  /* Allow only "inline" markup */
#define IN_LIST             0x020  /* Within wiki <ul> or <ol> */

/*
** Current state of the rendering engine
*/
typedef struct Renderer Renderer;
struct Renderer {
  Blob *pOut;                 /* Output appended to this blob */

**
** This routine will probably modify the content of z[].
*/
static void wiki_render(Renderer *p, char *z){
  int tokenType;
  ParsedMarkup markup;
  int n;
  int inlineOnly = (p->state & INLINE_MARKUP_ONLY)!=0;

  while( z[0] ){
    n = nextToken(z, p, &tokenType);
    p->state &= ~(AT_NEWLINE|AT_PARAGRAPH);
    switch( tokenType ){
      case TOKEN_PARAGRAPH: {
        if( inlineOnly ){
          /* blob_append(p->pOut, " ¶ ", -1); */
          blob_append(p->pOut, "    ", -1);
        }else{
          if( p->wikiList ){
            popStackToTag(p, p->wikiList);
            p->wikiList = 0;
          }
          endAutoParagraph(p);
          blob_appendf(p->pOut, "\n\n", 1);
          p->wantAutoParagraph = 1;
        }
        p->state |= AT_PARAGRAPH|AT_NEWLINE;
        break;
      }
      case TOKEN_NEWLINE: {
        blob_append(p->pOut, "\n", 1);
        p->state |= AT_NEWLINE;
        break;
      }
      case TOKEN_BULLET: {
        if( inlineOnly ){
          blob_append(p->pOut, " • ", -1);
        }else{
          if( p->wikiList!=MARKUP_UL ){
            if( p->wikiList ){
              popStackToTag(p, p->wikiList);
            }
            pushStack(p, MARKUP_UL);
            blob_append(p->pOut, "<ul>", 4);
            p->wikiList = MARKUP_UL;
          }
          popStackToTag(p, MARKUP_LI);
          startAutoParagraph(p);
          pushStack(p, MARKUP_LI);
          blob_append(p->pOut, "<li>", 4);
        }
        break;
      }
      case TOKEN_ENUM: {
        if( inlineOnly ){
          blob_appendf(p->pOut, " (%d) ", atoi(z));
        }else{
          if( p->wikiList!=MARKUP_OL ){
            if( p->wikiList ){
              popStackToTag(p, p->wikiList);
            }
            pushStack(p, MARKUP_OL);
            blob_append(p->pOut, "<ol>", 4);
            p->wikiList = MARKUP_OL;
          }
          popStackToTag(p, MARKUP_LI);
          startAutoParagraph(p);
          pushStack(p, MARKUP_LI);
          blob_appendf(p->pOut, "<li value=\"%d\">", atoi(z));
        }
        break;
      }
      case TOKEN_INDENT: {
        if( inlineOnly ){
          assert( p->wikiList==0 );
          pushStack(p, MARKUP_BLOCKQUOTE);
          blob_append(p->pOut, "<blockquote>", -1);
          p->wantAutoParagraph = 0;
          p->wikiList = MARKUP_BLOCKQUOTE;
        }
        break;
      }
      case TOKEN_CHARACTER: {
        startAutoParagraph(p);
        if( z[0]=='<' ){
          blob_append(p->pOut, "&lt;", 4);
        }else if( z[0]=='&' ){

        }else if( markup.iCode==MARKUP_INVALID ){
          unparseMarkup(&markup);
          startAutoParagraph(p);
          blob_append(p->pOut, "<", 4);
          n = 1;
        }else if( (markup.iType&MUTYPE_FONT)==0
                    && (p->state & FONT_MARKUP_ONLY)!=0 ){
          /* Do nothing */
        }else if( inlineOnly && (markup.iType&MUTYPE_INLINE)==0 ){
          /* Do nothing */
        }else if( markup.iCode==MARKUP_NOWIKI ){
          if( markup.endTag ){
            p->state |= ALLOW_WIKI;
          }else{
            p->state &= ~ALLOW_WIKI;
          }

*/
void wiki_convert(Blob *pIn, Blob *pOut, int flags){
  char *z;
  Renderer renderer;
  
  memset(&renderer, 0, sizeof(renderer));
  renderer.state = ALLOW_WIKI|AT_NEWLINE|AT_PARAGRAPH;
  if( flags & WIKI_NOBLOCK ){
    renderer.state |= INLINE_MARKUP_ONLY;
  }
  if( flags & WIKI_INLINE ){
    renderer.wantAutoParagraph = 0;
  }else{
    renderer.wantAutoParagraph = 1;
  }
  if( pOut ){
    renderer.pOut = pOut;
  }else{
    renderer.pOut = cgi_output_blob();
  }

  z = blob_str(pIn);