Re: How to know if a file has been opened before?
Re: How to know if a file has been opened before?
- Subject: Re: How to know if a file has been opened before?
- From: Michael Hall <email@hidden>
- Date: Mon, 04 Jun 2012 20:53:57 -0500
On Jun 4, 2012, at 5:50 PM, Antonio Nunes wrote:
> I have implemented window state restauration in an app. This works fine for re-opening documents that were open when the app was last quit. What I now want to do is extend that functionality to files that were not necessarily open when the app was last quit, but simply that have been opened at any time before. I can't put state information into the files themselves, since they are files that need to remain clean and that are not "owned" by my app.
I was recently looking at some old finder api's. and some of it involves fields that are pretty much obsolete.
I was trying to figure out which flag bit setting corresponded to the locked checkbox in File>Get Info. At first I thought it was the name locked flag in finder flags. It turned out insted to be the node locked setting of a different flag. Name locked apparently had something to do with files in the old classic System folders.
Assuming this bit is now never set, and not contents unpredictable, you could abscond with it as a user field associated with every file on the machine. Set it to mean whatever you want until someone else has the same idea.
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