Here is the code I have been working on. I think it works, but needs testing
It is the branch mru https://github.com/dmgerman/xournal/tree/mru i did some refactoring of the mru code and added some functions to maintain encapsulation. I also looked into evince. evince uses gvfs to save the page number as part of the metadata of the file. It is a really nice implementation that puts the last page opened as part of the file (so to speak). the problem is that it only works in linux, not in windows. --dmg On Wed, Dec 10, 2014 at 1:40 AM, Denis Auroux <aur...@math.berkeley.edu> wrote: > Hi Michael, > >> the discussion on MRU reminded me of another problem, namely that if one >> is running multiple instances of Xournal then the MRU file tends to be >> overwritten instead of extended. I do not know of the top of my head if >> this is still the case. If yes then perhaps the MRU list should be >> re-read before updating. > > > Yes, this is the case -- but it's harder to fix: besides re-reading it > before updating, when we update it we need to do so not just in memory but > also on disk. So each MRU update becomes: read from disk, update in memory, > write to disk. The issue is that, with multiple instances running > simultaneously and accessing the same MRU file fairly frequently, there is a > risk of the file getting corrupted -- so we need to get an exclusive file > lock during the read/update/write process. > >> Regarding updating the MRU file after each page change, I wonder if >> this could be a bit taxing in terms of power consumption on low-end >> devices. > > > This is why the MRU normally only gets updated in memory -- then it's just > one small thing to keep track of, much less work than updating the display. > (But I think the only issue with updating on disk is spinning the hard disk > on laptops that still have those.) We could do just a memory update when > only the page number changes. But all in all it gets quite complicated. Not > sure if I'm motivated to get it 100% right, it's not the most crucial > feature. > > Best, > Denis > > > -- > Denis Auroux > UC Berkeley, Department of Mathematics aur...@math.berkeley.edu > Institut Henri Poincare, Paris aur...@ihp.fr -- --dmg --- Daniel M. German http://turingmachine.org ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Xournal-devel mailing list Xournal-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xournal-devel
