Fossil

  if( g.xlinkClusterOnly && m.type!=CFTYPE_CLUSTER ){
    manifest_clear(&m);
    return 0;
  }
  db_begin_transaction();
  if( m.type==CFTYPE_MANIFEST ){
    if( !db_exists("SELECT 1 FROM mlink WHERE mid=%d", rid) ){
      char *zCom;
      for(i=0; i<m.nParent; i++){
        int pid = uuid_to_rid(m.azParent[i], 1);
        db_multi_exec("INSERT OR IGNORE INTO plink(pid, cid, isprim, mtime)"
                      "VALUES(%d, %d, %d, %.17g)", pid, rid, i==0, m.rDate);
        if( i==0 ){
          add_mlink(pid, 0, rid, &m);
          parentid = pid;

        "  (SELECT value FROM tagxref WHERE tagid=%d AND rid=%d));",
        TAG_DATE, rid, m.rDate,
        rid, m.zUser, m.zComment, 
        TAG_BGCOLOR, rid,
        TAG_USER, rid,
        TAG_COMMENT, rid
      );
      zCom = db_text(0, "SELECT coalesce(ecomment, comment) FROM event"
                        " WHERE rowid=last_insert_rowid()");
      wiki_extract_links(zCom, rid, 0, m.rDate, 1, WIKI_INLINE);
      free(zCom);
    }
  }
  if( m.type==CFTYPE_CLUSTER ){
    tag_insert("cluster", 1, 0, rid, m.rDate, rid);
    for(i=0; i<m.nCChild; i++){
      int mid;
      mid = uuid_to_rid(m.azCChild[i], 1);

@   origid INTEGER REFERENCES blob, -- check-in holding propagated tag
@   value TEXT,                     -- Value of the tag.  Might be NULL.
@   mtime TIMESTAMP,                -- Time of addition or removal
@   rid INTEGER REFERENCE blob,     -- Artifact tag is applied to
@   UNIQUE(rid, tagid)
@ );
@ CREATE INDEX tagxref_i1 ON tagxref(tagid, mtime);
@
@ -- When a hyperlink occurs from one artifact to another (for example
@ -- when a check-in comment refers to a ticket) an entry is made in
@ -- the following table for that hyperlink.  This table is used to
@ -- facilitate the display of "back links".
@ --
@ CREATE TABLE backlink(
@   target TEXT,           -- Where the hyperlink points to
@   srctype INT,           -- 0: check-in  1: ticket  2: wiki
@   srcid INT,             -- rid for checkin or wiki.  tkt_id for ticket.
@   mtime TIMESTAMP,       -- time that the hyperlink was added
@   UNIQUE(target, srctype, srcid)
@ );
@ CREATE INDEX backlink_src ON backlink(srcid, srctype);
@
@ -- Template for the TICKET table
@ --
@ -- NB: when changing the schema of the TICKET table here, also make the
@ -- same change in tktsetup.c.
@ --
@ CREATE TABLE ticket(

    case TAG_USER: {
      zCol = "euser";
      break;
    }
  }
  if( zCol ){
    db_multi_exec("UPDATE event SET %s=%Q WHERE objid=%d", zCol, zValue, rid);
    if( tagid==TAG_COMMENT ){
      char *zCopy = mprintf("%s", zValue);
      wiki_extract_links(zCopy, rid, 0, mtime, 1, WIKI_INLINE);
      free(zCopy);
    }
  }
  if( tagid==TAG_DATE ){
    db_multi_exec("UPDATE event SET mtime=julianday(%Q) WHERE objid=%d",
                  zValue, rid);
  }
  if( tagtype==0 || tagtype==2 ){
    tag_propagate(rid, tagid, tagtype, rid, zValue, mtime);

/*
** Parse only Wiki links, return everything else as TOKEN_RAW.
**
** z points to the start of a token.  Return the number of
** characters in that token. Write the token type into *pTokenType.
*/

static int nextRawToken(const char *z, Renderer *p, int *pTokenType){
  int n;
  if( z[0]=='[' && (n = linkLength(z))>0 ){
    *pTokenType = TOKEN_LINK;
    return n;
  }
  *pTokenType = TOKEN_RAW;

** output its end tag if it is not a </div> tag.
*/
static void popStack(Renderer *p){
  if( p->nStack ){
    int iCode;
    p->nStack--;
    iCode = p->aStack[p->nStack].iCode;
    if( iCode!=MARKUP_DIV && p->pOut ){
      blob_appendf(p->pOut, "</%s>", aMarkup[iCode].zName);
    }
  }
}

/*
** Push a new markup value onto the stack.  Enlarge the stack

  iStart = i+6;
  for(i=iStart; z[i] && (z[i]!='<' || strncmp(&z[i],"</title>",8)!=0); i++){}
  if( z[i]!='<' ) return 0;
  blob_init(pTitle, &z[iStart], i-iStart);
  blob_init(pTail, &z[i+8], -1);
  return 1;
}

/*
** Parse text looking for wiki hyperlinks in one of the formats:
**
**       [target]
**       [target|...]
**
** Where "target" can be either an artifact ID prefix or a wiki page
** name.  For each such hyperlink found, add an entry to the
** backlink table.
*/
void wiki_extract_links(
  char *z,           /* The wiki text from which to extract links */
  int srcid,         /* srcid field for new BACKLINK table entries */
  int srctype,       /* srctype field for new BACKLINK table entries */
  double mtime,      /* mtime field for new BACKLINK table entries */
  int replaceFlag,   /* True first delete prior BACKLINK entries */
  int flags          /* wiki parsing flags */
){
  Renderer renderer;
  int tokenType;
  ParsedMarkup markup;
  int n;
  int inlineOnly;
  int wikiUseHtml = 0;

  memset(&renderer, 0, sizeof(renderer));
  renderer.state = ALLOW_WIKI|AT_NEWLINE|AT_PARAGRAPH;
  if( flags & WIKI_NOBLOCK ){
    renderer.state |= INLINE_MARKUP_ONLY;
  }
  if( db_get_int("wiki-use-html", 0) ){
    renderer.state |= WIKI_USE_HTML;
    wikiUseHtml = 1;
  }
  inlineOnly = (renderer.state & INLINE_MARKUP_ONLY)!=0;
  if( replaceFlag ){
    db_multi_exec("DELETE FROM backlink WHERE srctype=%d AND srcid=%d",
                  srctype, srcid);
  }

  while( z[0] ){
    if( wikiUseHtml ){
      n = nextRawToken(z, &renderer, &tokenType);
    }else{
      n = nextWikiToken(z, &renderer, &tokenType);
    }
    switch( tokenType ){
      case TOKEN_LINK: {
        char *zTarget;
        int i, c;
        char zLink[42];

        zTarget = &z[1];
        for(i=0; zTarget[i] && zTarget[i]!='|' && zTarget[i]!=']'; i++){}
        while(i>1 && zTarget[i-1]==' '){ i--; }
        c = zTarget[i];
        zTarget[i] = 0;
        if( is_valid_uuid(zTarget) ){
          memcpy(zLink, zTarget, i+1);
          canonical16(zLink, i);
          db_multi_exec(
             "REPLACE INTO backlink(target,srctype,srcid,mtime)"
             "VALUES(%Q,%d,%d,%g)", zLink, srctype, srcid, mtime
          );
        }
        zTarget[i] = c;
        break;
      }
      case TOKEN_MARKUP: {
        const char *zId;
        int iDiv;
        parseMarkup(&markup, z);

        /* Markup of the form </div id=ID> where there is a matching
        ** ID somewhere on the stack.  Exit the verbatim if were are in
        ** it.  Pop the stack up to the matching <div>.  Discard the
        ** </div>
        */
        if( markup.iCode==MARKUP_DIV && markup.endTag &&
             (zId = markupId(&markup))!=0 &&
             (iDiv = findTagWithId(&renderer, MARKUP_DIV, zId))>=0
        ){
          if( renderer.inVerbatim ){
            renderer.inVerbatim = 0;
            renderer.state = renderer.preVerbState;
          }
          while( renderer.nStack>iDiv+1 ) popStack(&renderer);
          if( renderer.aStack[iDiv].allowWiki ){
            renderer.state |= ALLOW_WIKI;
          }else{
            renderer.state &= ~ALLOW_WIKI;
          }
          renderer.nStack--;
        }else

        /* If within <verbatim id=ID> ignore everything other than
        ** </verbatim id=ID> and the </dev id=ID2> above.
        */
        if( renderer.inVerbatim ){
          if( endVerbatim(&renderer, &markup) ){
            renderer.inVerbatim = 0;
            renderer.state = renderer.preVerbState;
          }else{
            n = 1;
          }
        }else

        /* Render invalid markup literally.  The markup appears in the
        ** final output as plain text.
        */
        if( markup.iCode==MARKUP_INVALID ){
          n = 1;
        }else

        /* If the markup is not font-change markup ignore it if the
        ** font-change-only flag is set.
        */
        if( (markup.iType&MUTYPE_FONT)==0 &&
                            (renderer.state & FONT_MARKUP_ONLY)!=0 ){
          /* Do nothing */
        }else

        if( markup.iCode==MARKUP_NOWIKI ){
          if( markup.endTag ){
            renderer.state |= ALLOW_WIKI;
          }else{
            renderer.state &= ~ALLOW_WIKI;
          }
        }else

        /* Ignore block markup for in-line rendering.
        */
        if( inlineOnly && (markup.iType&MUTYPE_INLINE)==0 ){
          /* Do nothing */
        }else

        /* Generate end-tags */
        if( markup.endTag ){
          popStackToTag(&renderer, markup.iCode);
        }else

        /* Push <div> markup onto the stack together with the id=ID attribute.
        */
        if( markup.iCode==MARKUP_DIV ){
          pushStackWithId(&renderer, markup.iCode, markupId(&markup),
                          (renderer.state & ALLOW_WIKI)!=0);
        }else

        /* Enter <verbatim> processing.  With verbatim enabled, all other
        ** markup other than the corresponding end-tag with the same ID is
        ** ignored.
        */
        if( markup.iCode==MARKUP_VERBATIM ){
          int vAttrIdx, vAttrDidAppend=0;
          renderer.zVerbatimId = 0;
          renderer.inVerbatim = 1;
          renderer.preVerbState = renderer.state;
          renderer.state &= ~ALLOW_WIKI;
          for (vAttrIdx = 0; vAttrIdx < markup.nAttr; vAttrIdx++){
            if( markup.aAttr[vAttrIdx].iACode == ATTR_ID ){
              renderer.zVerbatimId = markup.aAttr[0].zValue;
            }else if( markup.aAttr[vAttrIdx].iACode == ATTR_TYPE ){
              vAttrDidAppend=1;
            }
          }
          renderer.wantAutoParagraph = 0;
        }

        /* Restore the input text to its original configuration
        */
        unparseMarkup(&markup);
        break;
      }
      default: {
        break;
      }
    }
    z += n;
  }
}