Re: [platform-swt-dev] Mac OS 10.4 Finder drag and drop development

[Randy Hudson <hudsonr@xxxxxxxxxx>]

10.4 is not a supported platform.
http://www.eclipse.org/eclipse/development/eclipse_project_plan_3_1.html#TargetOperatingEnvironments

-Randy

Eric Zimmerman <eric@xxxxxxxxxxx>
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx

05/16/2005 08:02 PM

Please respond to
"Eclipse Platform SWT component developers list."

To	"platform-swt-dev@xxxxxxxxxxx" <platform-swt-dev@xxxxxxxxxxx>
cc
Subject	[platform-swt-dev] Mac OS 10.4 Finder drag and drop development

Drag and Drop to and from the finder in Mac OS 10.4
does not work 
(Already submitted as a bug).  I have spent the last couple of days
working on a fix but, I seem to be stuck.

I have fixed the drop source capabilities within eclipse by adding type
'furl' to the FileTransfer Class and implementing the correct 
nativeToJava switch to do the processing: (Following the guidelines 
here: http://developer.apple.com/technotes/tn/tn2022.html)

if (transferData.type == FURLID) {
            int encoding = OS.CFStringGetSystemEncoding();
            int count = transferData.data.length;
            String[] fileNames = new String[count];
            for (int i = 0; i < count;
i++) {
                System.out.println("url:
" + new 
String(transferData.data[i]));
                byte[] urlData
= transferData.data[i];
                int url = "">
OS.CFURLCreateWithBytes(OS.kCFAllocatorDefault, urlData, urlData.length,
encoding, 0);
                if (url == 0) return
null;
                try {
                    int
path = OS.CFURLCopyFileSystemPath(url, 
OS.kCFURLPOSIXPathStyle);
                    if
(path == 0) return null;
                    try
{
                    
   int length = OS.CFStringGetLength(path);
                    
   if (length == 0) return null;
                    
   char[] buffer = new char[length];
                    
   CFRange range = new CFRange();
                    
   range.length = length;
                    
   OS.CFStringGetCharacters(path, range, buffer);
                    
   fileNames[i] = new String(buffer);
                    
   System.out.println("filename: " + fileNames[i]);
                    }
finally {
                    
   OS.CFRelease(path);
                    }
                } finally {
                    OS.CFRelease(url);
                }
            }
            return fileNames;
        }

I had to wrap the CFURLCreateWithBytes native method into the swt-pi 
library in order to accomplish this.

I then figured the issue with drag out was probably the reciprical 
problem so I implemented the javaToNative furl processing:

if (transferData.type == FURLID) {
            System.out.println("Requesting
furlid transfer");
            byte[][] data = "" byte[files.length][];
            for (int i = 0; i < data.length;
i++) {
                File file = new
File(files[i]);
                boolean isDirectory
= file.isDirectory();
                String fileName
= files[i];
                char[] chars =
new char[fileName.length()];
                fileName.getChars(0,
chars.length, chars, 0);
                int cfstring =
OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault, chars, 
chars.length);
                if (cfstring ==
0) return;
                try {
                    int
url = "">
OS.CFURLCreateWithFileSystemPath(OS.kCFAllocatorDefault, cfstring, 
OS.kCFURLPOSIXPathStyle, isDirectory);
                    if
(url == 0) return;
                    try
{
                    
   int encoding = OS.CFStringGetSystemEncoding();
                    
   int theData = 
OS.CFURLCreateData(OS.kCFAllocatorDefault, url, encoding, true);
                    
   if(theData == 0) return;
                    
   try {
                    
       int length = OS.CFDataGetLength(theData);
                    
       byte[] buffer = new byte[length];
                    
       CFRange range = new CFRange();
                    
       range.length = length;
                    
       OS.CFDataGetBytes(theData, range, buffer);
                    
       System.out.println("FURL: " + new
String(buffer));
                    
       data[i] = buffer;
                    
   } finally {
                    
       OS.CFRelease(theData);
                    
   }
                    }
finally {
                    
   OS.CFRelease(url);
                    }
                } finally {
                    OS.CFRelease(cfstring);
                }
            }
            transferData.data = "">
            transferData.result = 0;
        }

To do this I also needed to wrap CFURLCreateData, CFDataGetLength, and
CFDataGetBytes in the swt-pi library.  This code seems to function
correctly as a dragflavor since it is accepted by most applications 
other than the finder.

Whenever I attempt to drag from my application in the finder I get a 
positive result back from the trackDrag method that should indicate the
finder accepted my drag, but nothing shows up in the finder. :-(

I believe I have done most of the work to make this happen but am just
missing a little step to finish it off.  If anybody can give me some
advice on where to look or something to try I will submit all of my 
wrappers and code that are developed.

Thanks,

Eric
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