Re: How to get a CF_HDROP from javascript

Harry wrote:

> I have a variable lf of type nsILocalFile and I want to get the CF_HDROP 
> clipboard format (from javascript, latest FF1.5).
> 
> My understanding is that I need  to put a "application/x-moz-file" 
> flavour in the clipboard, but setTransferData seems to fail.
> Somehow there is a CF_HDROP on the clipboard, but seems to be zero data.
> 
> I tried many variants of pointers (nsIFile, nsILocalFile, nsISupports), 
> also I used nsISupportsString encapsulating nsIFile.path, nsIURI.spec 
> but nothing helps.
> 
> I'm able to put it there as text as "text/unicode" or 
> "application/x-moz-url", but thats not what I want to realize.
> 
> Following snipped gives an idea whats not working ...
> 
> const CI=Components.interfaces;
>   // lf = nsILocalFile
>   // uri= nsIURI
> 
> var gClipboard = 
> Components.classes["@mozilla.org/widget/clipboard;1"].getService(CI.nsIClipboard);
>    var trans = 
> Components.classes["@mozilla.org/widget/transferable;1"].createInstance(CI.nsITransferable);
> 
> var kFileMime="application/x-moz-file";
> 
> trans.addDataFlavor(kFileMime);
> // trans.setTransferData(kFileMime, lf.QueryInterface(CI.nsISupports), 4);
> 
> // trans.setTransferData(kFileMime, lf, 4); // 4=pointer size
> // trans.setTransferData(kFileMime, lf, 1);
> // trans.setTransferData(kFileMime, lf, lf.path.length);
> // trans.setTransferData(kFileMime, lf, lf.path.length*2);
> // trans.setTransferData(kFileMime, uri, 4);
> // trans.setTransferData(kFileMime, uri, 1);
> // trans.setTransferData(kFileMime, uri, uri.spec.length);
> // trans.setTransferData(kFileMime, uri, uri.spec.length*2);
> 
> var sstr = 
> Components.classes["@mozilla.org/supports-string;1"].createInstance(CI.nsISupportsString);
> var text=uri.spec;
> sstr.data=text;
> // trans.setTransferData(kFileMime, sstr, text.length);
> // trans.setTransferData(kFileMime, sstr, text.length*2);
> 
> Any ideas?
> Harry
try posting in the mozilla javascript newsgroup.  They might beable to 
help you better there:

news://news.mozilla.org/mozilla.dev.tech.javascript

-- 
Time for another change