xwinclip/-clipboard - Development on no selection stealing version

[J S]

Harold,

Have you taken out the XFIXES branch?

JS.

>Hi,
>
>Could you help me out please? I'm not too familiar with using the XFree 
>CVS. Do I need to check out all the XFree code to compile the test code 
>below? I tried:
>
>cvs checkout -A xc
>
>but that is taking a really long tim to download so not sure if I'm on the 
>right track here.
>I also tried :
>
>cvs checkout -rEXPR1 XFIXES_BRANCH
>
>but that didn't work.
>
>Thanks for any help.
>
>JS.
>
>>
>>I committed an XFIXES_BRANCH branch to CVS on SourceForge.  Follow the 
>>instructions from David's email in this thread if you don't know how to 
>>checkout a branch.
>>
>>I hope I got all the correct files checked in... I won't be back online 
>>until Sunday evening.
>>
>>Harold
>>
>>Harold L Hunt II wrote:
>>>I have been working with the code for Keith Packard's XFIXES extension.  
>>>The XFIXES extension includes a new hook in Xserver/dix/dispatch.c that 
>>>allows functions within the Xserver (such as the XFIXES xtension) to 
>>>register for a callback when a selection's ownership changes, among other 
>>>things.
>>>
>>>The best documentation I can find for the selection portion of XFIXES is 
>>>Owen Taylor's writeup on a RedHat list that doesn't seem to have a public 
>>>archive anymore.  Google has a cache; both URLs are below...
>>>
>>>https://listman.redhat.com/pipermail/xdg-list/2002-November/000937.html
>>>
>>>http://216.239.53.100/search?q=cache:4osKtTvNNhcJ:https://listman.redhat.com/pipermail/xdg-list/2002-November/000937.html+XFixesSelectSelectionInput&hl=en&ie=UTF-8
>>>
>>>
>>>
>>>In any case, I reincluded the XFIXES extension in my local tree from 
>>>SourceForge.  I built the extension and modified the -clipboard module to 
>>>register for messages from the XFIXES extension related to ownership 
>>>changes of XA_PRIMARY.
>>>
>>>The ownership notifications work just fine, and I am able to copy text 
>>>from X to Windows repeatedly without having to transfer ownership of 
>>>XA_PRIMARY to the clipboard manager (the -clipboard module).
>>>
>>>The remaining problem is that I modified the Win32 message loop in the 
>>>-clipboard module to add itself to the clipboard chain and to call 
>>>XSetSelectionOwner when something comes through the Windows clipboard. 
>>>This immediately resulted in an infinite loop, as my X event handling for 
>>>a selection ownership change calls XConvertSelection, which ends up 
>>>sending a SelectionNotify event back to the -clipboard module.  The 
>>>-clipboard module copies the text from the X clipboard to the Windows 
>>>clipboard on a SelectionNofity event.  Thus, the text makes a round-trip 
>>>from the Windows clipboard, to the X clipboard, back to the Windows 
>>>clipboard, ad nauseam.
>>>
>>>I added a little break-out in the selection ownership change processing 
>>>that prevents XSetSelectionOwner from being called if the current owner 
>>>of the selection is the clipboard manager window.  This stops the 
>>>infinite looping, but it causes a problem very similar to the original 
>>>xwinclip problem: the X selection is immediately unhighlighted.
>>>
>>>So, my questions are:
>>>
>>>1) Does anyone feel like helping on this?  Got any ideas right off the 
>>>bat?
>>>
>>>2) What would be the best way for me to share the code with other 
>>>developers?  I don't want to commit the XFIXES stuff to our SourceForge 
>>>tree's HEAD, but could I use another branch?  If so, please give me some 
>>>instructions for what to do... I haven't got time to study CVS all day.
>>>
>>>
>>>I am pleased with my current progress point.  This version that is 
>>>dependent upon a stripped-down XFIXES extension will represent about a 
>>>40% completion point in new clipboard integration support that doesn't 
>>>steal selection ownership.  The remaining work to be done could include 
>>>removing the clipboard manager client altogether, removing any dependency 
>>>on XFIXES and using only the internal hooking interface, etc.
>>>
>>>Please postpone any debate on those remaining steps until the current 
>>>programming actually works.  There will be no point to debate the merits 
>>>of steps 5, 6, and 7 unless we can actually get step 4 to do what we 
>>>intend.
>>>
>>>
>>>Harold
>>
>
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