[Project_owners] bookmarks-tree: SeaMonkey vs Firefox.

[Philip Chee]

Hello Project Owners and assorted sophonts.

I've been busy porting the functionality of the "Locate in Bookmark
Folders" Firefox extension
<http://alex.muntean.name/projects/mozilla/Locate_in_Bookmark_Folders/>
to SeaMonkey.

This extension calls selectResource() which is not a method available in
the SeaMonkey version of the bookmarks-tree xbl. So I've extracted the
javascript into my extension. Now selectResource() calls
getParentChain() which however isn't in the SeaMonkey version of
nsBookmarksService.cpp. And then of course getParentChain() calls
getParent() -ditto-.

Firefox version:
<http://lxr.mozilla.org/seamonkey/source/browser/components/bookmarks/src/nsBookmarksService.cpp#3020>

I've emulated these methods in js and they seem to work. Anybody want to
see if I've missed out anything? I don't really know C++ at all.

  // from FF nsBookmarksService.cpp (translated into js)
  getParentChain : function (aResource) {
    var parentArray = new Array();
    if (aResource) {
      var parent = xsbBookmarks.getParent(aResource);
      while (parent) {
        parentArray.unshift(parent);
        parent = xsbBookmarks.getParent(parent);
      }
    }
    return parentArray;
  },

  // from FF nsBookmarksService.cpp (translated into js)
  getParent : function (aResource) {
    var arcsIn = BMDS.ArcLabelsIn(aResource);
    var containerArc;
    while (arcsIn.hasMoreElements()) {
      containerArc = arcsIn.getNext();
      // Test if the arc is ordinal. We will assume that the parent is
determined
      // by the first ordinal arc that points to the resource.
      // That's not bullet-proof, since several ordinal arcs can point
to the same
      // resource. However, this will be sufficient for most of the cases.
      if (RDFCU.IsOrdinalProperty(containerArc)) {
        return BMDS.GetSources(containerArc, aResource, true).getNext()
                   .QueryInterface(kRDFRSCIID);
      }
    }
    return null;
  }

Phil

-- 
Philip Chee <philip at aleytys.pc.my>, <philip.chee at gmail.com>
http://flashblock.mozdev.org/ http://xsidebar.mozdev.org
Guard us from the she-wolf and the wolf, and guard us from the thief,
oh Night, and so be good for us to pass.
[ ]I saw Elvis.  He sat between me and Bigfoot on the UFO.
* TagZilla 0.059