Re: Making the Versions Browser less of a dog
Re: Making the Versions Browser less of a dog
- Subject: Re: Making the Versions Browser less of a dog
- From: Jerry Krinock <email@hidden>
- Date: Thu, 20 Nov 2014 14:24:00 -0500
> On 2014 Nov 19, at 20:36, Graham Cox <email@hidden> wrote:
>
> Is there a sound way to determine at document creation time whether the VB is active or not?
Try the term “viewing mode”, as in-[NSDocument inViewingMode]. The documentation leaves me unsure as to whether or not “viewing mode” == “versions browser”. I think someone at DTS that told me back in 2011 that this is true. But I consider that to be no more than a data point :(
> Ideally this would be for the actual document in question rather than globally, because while it doesn't seem to be possible in the current implementation, the architecture appears to permit documents to be opened "normally" even while the VB is active for a different document.
I think what you’re saying is that you want this answer per NSDocument instance.
> How do others hande this?
Unfortunately, I found that -inViewingMode did not always give me the correct answer; in other words “viewing mode” ~= “versions browser”. So I wrapped it with some hacks to also check if the document’s path places it in the DocumentRevisions-V100 or Backups.backupdb folder. Code is here:
https://github.com/jerrykrinock/CategoriesObjC/blob/master/NSDocument+SSYAutosaveBetter.h
https://github.com/jerrykrinock/CategoriesObjC/blob/master/NSDocument+SSYAutosaveBetter.m
I realize this is a disgusting, evil and fragile hack. Indeed, they might bump DocumentRevisions to V110 or V200 someday. I was hoping for this to be temporary, and think I filed a bug on the lack of a good method to determine if you’re in Versions Browser, back in 2011. I can’t find my bug report now, but discount that because I have little confidence in the search function in bugreport.apple.com.
> Do you just accept that the VB is a total dog unless your files are trivial, or are there good workarounds to get acceptable performance?
My apps don’t have the performance issue, but they do have the issue that some controls need to be disabled. Also, I've needed to know whether or not an NSDocument instance in viewing mode in order to work around other NSDocument bugs.
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