Issue with calibre viewer

DNSB · 10-20-2019, 01:25 AM

This is more of a operator issue but... I had a book open in calibre viewer and noticed that a chapter started on the same page as the previous chapter. I opened the epub in Sigil and found the two chapters were in the same file. I split the file, rebuilt the TOC, etc. and saved the epub. I went back to the calibre viewer and hit F5 to refresh. I ended up with a spinning cursor for ~5 minutes before I force closed the viewer. Tried this several times and 1 of the next 5 trials gave the same freeze with the 4 successful attempts giving the "Preparing book for first read" message and continuing after a few seconds.

If I close the viewer before editing and reopen it after the edit/save, no failures in those tests. Probably the best way to handle this task but since calibre's viewer does not seem to open the file in exclusive mode, I had hoped to save a few clicks.

OS is Windows 10 build 19002.1 (191010-1436), calibre version is 4.2 x64.

kovidgoyal · 10-20-2019, 02:50 AM

I cant replicate, steps I tried:

Code:

calibre-debug -c "from calibre.utils.lock import windows_open as open; f = open('file.epub'); f.seek(1); input()"

this locks file.epub until you press enter

then tried refreshing file.epub in the viewer, it pops up an error about the file being locked, as expected.

I dont know is sigil uses atomic file writing, but if not it might be that the eub was in an inconsistent state, causing issues.

DNSB · 10-20-2019, 03:33 AM

Quote:

Originally Posted by kovidgoyal

I cant replicate, steps I tried:

Code:

calibre-debug -c "from calibre.utils.lock import windows_open as open; f = open('file.epub'); f.seek(1); input()"

this locks file.epub until you press enter

then tried refreshing file.epub in the viewer, it pops up an error about the file being locked, as expected.

I dont know is sigil uses atomic file writing, but if not it might be that the eub was in an inconsistent state, causing issues.

When I was testing, 2 in 6 times I got the failure so given the differences between software (this was on a Windows Insider preview) and hardware (running on a VMWare Workstation VM), not too surprising. As I said, in future, close the viewer and then re-open after editing is going to be my workflow.

I was originally expecting Sigil to not be able to save the file while it was open in viewer so was happy to save a couple of clicks/seconds.

nwgal · 11-13-2019, 10:40 AM

Ever since the last update, I get the message "preparing book for first read" for every book I open! This is new, it's never happened before. It doesn't take long, usually just a few seconds. But I'm curious if this is normal. Thanks.

kovidgoyal · 11-13-2019, 10:58 AM

That happens th efirst time you open any book. But only the first time.

nwgal · 11-13-2019, 01:32 PM

Thank you!

10-20-2019, 01:25 AM	#1
DNSB Bibliophagist Posts: 38,029 Karma: 152037714 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Issue with calibre viewer This is more of a operator issue but... I had a book open in calibre viewer and noticed that a chapter started on the same page as the previous chapter. I opened the epub in Sigil and found the two chapters were in the same file. I split the file, rebuilt the TOC, etc. and saved the epub. I went back to the calibre viewer and hit F5 to refresh. I ended up with a spinning cursor for ~5 minutes before I force closed the viewer. Tried this several times and 1 of the next 5 trials gave the same freeze with the 4 successful attempts giving the "Preparing book for first read" message and continuing after a few seconds. If I close the viewer before editing and reopen it after the edit/save, no failures in those tests. Probably the best way to handle this task but since calibre's viewer does not seem to open the file in exclusive mode, I had hoped to save a few clicks. OS is Windows 10 build 19002.1 (191010-1436), calibre version is 4.2 x64. Last edited by DNSB; 10-20-2019 at 02:03 AM.

10-20-2019, 02:50 AM	#2
kovidgoyal creator of calibre Posts: 44,162 Karma: 22670164 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I cant replicate, steps I tried: Code: calibre-debug -c "from calibre.utils.lock import windows_open as open; f = open('file.epub'); f.seek(1); input()" this locks file.epub until you press enter then tried refreshing file.epub in the viewer, it pops up an error about the file being locked, as expected. I dont know is sigil uses atomic file writing, but if not it might be that the eub was in an inconsistent state, causing issues.

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11-13-2019, 10:40 AM	#4
nwgal Member Posts: 11 Karma: 10 Join Date: Sep 2018 Location: Pacific Northwest Device: Nook	Ever since the last update, I get the message "preparing book for first read" for every book I open! This is new, it's never happened before. It doesn't take long, usually just a few seconds. But I'm curious if this is normal. Thanks.

11-13-2019, 10:58 AM	#5
kovidgoyal creator of calibre Posts: 44,162 Karma: 22670164 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That happens th efirst time you open any book. But only the first time.

11-13-2019, 01:32 PM	#6
nwgal Member Posts: 11 Karma: 10 Join Date: Sep 2018 Location: Pacific Northwest Device: Nook	Thank you!

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