When clipboard synchronization is enabled both ways, ie XQuartz clipboard <-> OS X pasteboard, the problem appears. When set to synchronize only one way, either way, the line copy problem does not manifest.
I suspect that if XQuartz is set to synchronize both ways, the following occurs when a line is copied in SlickEdit:
- SlickEdit places the line in the X11 clipboard with metadata indicating that the clipboard contents represent a full line
- Detecting that the X11 clipboard has changed, XQuartz replaces the OS X pasteboard with the X11 clipboard, omitting metadata
- Detecting that the OS X pasteboard has changed, XQuartz replaces the X11 clipboard with the OS X pasteboard, omitting metadata
The final step wipes out the metadata in the X11 clipboard indicating that the clipboard contents represent a complete line of text. Has anyone else made any progress towards resolving this issue without disabling synchronization? If not, I might try attaching a debugger to a debug build of XQuartz so that I can step through the clipboard/pasteboard synchronization code in order to verify my educated guess about its behavior in our scenario. If I'm correct, the issue may be correctable with a simple patch to XQuartz.
