Epub plugin dev

DiapDealer · 10-19-2010, 11:33 AM

I have a plugin that modifies epubs on import. It seems to work fine, but the cover thumbnail does not show (nor is the cover image present in the library folder) after the successful import.

If I open the metadata editor and click on the "set the cover from the selected format" button, it correctly extracts the cover image and the thumbnail shows when browsing the library. If I re-import the modified epub, it finds the cover image just fine... which leads me to believe it's a priority/order of operation type issue.

When does Calibre attempt to extract the Epub cover in relation to import plugins? If it happens before any import plugins, is there a way to force Calibre to repeat the cover extraction routine from within my plugin?

It's a picky little detail, but I'd rather not have to click that "set the cover from the selected format" button every time I import an epub.

JSWolf · 10-19-2010, 11:41 AM

What does your plugin do to the ePub?

DiapDealer · 10-19-2010, 12:13 PM

Quote:

What does your plugin do to the ePub?

It's really kind of irrelevant to my question. I don't say that to be a smartass, but rather in an attempt to stay within the forum rules.

Suffice it to say, that the epub's cover is unavailable when the import process begins (and that appears to be when Calibre's Epub metadata reader attempts to extract the cover). For whatever reason. Let's say it's because there is no cover.

After my plugin runs, the cover is available (let's say it's because my plugin inserts a cover), but it's too late in the import process for Calibre to retrieve it properly. I know my plugin does this correctly because I can click that "set cover from selected format" button, and it works.

I just need to know what code is behind that button... and can I simulate "clicking" that button from my plugin? Or is it possible to prioritize my plugin to run before Calibre's built-in 'Read EPUB metadata' plugin?

kovidgoyal · 10-19-2010, 12:50 PM

There's no way to do it from within the plugin, at least at the moment. Open a ticket for it, and I'll see if I can setup a hook for it.

I'm travelling this week so it will be a little while before I can look at it.

DiapDealer · 10-19-2010, 01:15 PM

Thanks for the response. It's no biggie, but I'll open a ticket and look for it sometime in the future.

EDIT: Ticket created (#7245)

TomF · 10-22-2010, 09:15 PM

Quote:

Originally Posted by DiapDealer

It's really kind of irrelevant to my question. I don't say that to be a smartass, but rather in an attempt to stay within the forum rules.

If anyone is interested in exactly what this plugin does, they can look on a certain Alf's blog for Tools 2.0 (see the first post dated February 11, 2010 "Continuing..." and entry #18 dated October 18, 2010 "New Version of the Tools Available" at the bottom).

Thanks, DiapDealer!

pchrist7 · 10-23-2010, 03:04 AM

And Thanx TomF ! I missed that

Leep · 10-26-2010, 02:03 PM

Not sure anyone realizes how fabulous these plugins are. They eliminate the need to install both python and pycrypto. Calibre does it all. Profound thanks to DiapDealer.
A couple of easy steps and you are there.

93terp · 10-27-2010, 04:44 PM

Quote:

Originally Posted by Leep

Not sure anyone realizes how fabulous these plugins are. They eliminate the need to install both python and pycrypto. Calibre does it all. Profound thanks to DiapDealer.
A couple of easy steps and you are there.

I have said plugins from toolsv2.0, but haven't played around with them too much yet. When I add one of these plugins to Calibre, I couldn't find where Calibre was putting it; in other words, I couldn't tell/verify if it was actually added.

Also, once a certain plugin is added, do I just add the book to Calibre & the plugin does it's magic?

Thanks for any help/direction you can provide!

sherman · 10-27-2010, 08:22 PM

The plugins in question should be listed under File type plugins.

See the included readme files to find how to configure them.

Once configured, they should do their work when you add a book to calibre.

93terp · 10-27-2010, 09:17 PM

Quote:

Originally Posted by sherman

The plugins in question should be listed under File type plugins.

See the included readme files to find how to configure them.

Once configured, they should do their work when you add a book to calibre.

Thanks for the info. I've been playing around with it for a little while now & I finally figured it out.

kiwipippa · 10-28-2010, 01:34 PM

Quote:

Originally Posted by Leep

Not sure anyone realizes how fabulous these plugins are. They eliminate the need to install both python and pycrypto. Calibre does it all. Profound thanks to DiapDealer.
A couple of easy steps and you are there.

To everyone involved in this - you are legends. It really is as easy as leep says. I want to kiss you all!

Thanks

DiapDealer · 10-30-2010, 03:38 PM

Quote:

Read metadata only after on import plugins have run when adding books to GUI

Closes tickets: 7245

Thank you so much for making this change!

kovidgoyal · 10-30-2010, 03:43 PM

you're welcome

lene1949 · 11-10-2010, 08:05 PM

Quote:

Originally Posted by TomF

If anyone is interested in exactly what this plugin does, they can look on a certain Alf's blog for Tools 2.0 (see the first post dated February 11, 2010 "Continuing..." and entry #18 dated October 18, 2010 "New Version of the Tools Available" at the bottom).

Thanks, DiapDealer!

Thanks for the directions... It never occurred to me to look at a post for February...

10-19-2010, 11:41 AM	#2
JSWolf Mobile Reader Geek Posts: 34,227 Karma: 13801376 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Sony Reader PRS-650, iPad	What does your plugin do to the ePub? __________________ Jon 2013 Reading List

10-19-2010, 12:50 PM	#4
kovidgoyal Creator of calibre Posts: 22,515 Karma: 2944574 Join Date: Oct 2006 Location: Mumbai, India Device: Various	There's no way to do it from within the plugin, at least at the moment. Open a ticket for it, and I'll see if I can setup a hook for it. I'm travelling this week so it will be a little while before I can look at it. __________________ Get calibre Notice to all: I can not provide assistance with DRM removal, for legal reasons, so please do not contact me about it.

10-19-2010, 01:15 PM	#5
DiapDealer Grand Sorcerer Posts: 6,840 Karma: 23400772 Join Date: Jan 2010 Device: Kindle Fire HD, Kindle 2	Thanks for the response. It's no biggie, but I'll open a ticket and look for it sometime in the future. EDIT: Ticket created (#7245) Last edited by DiapDealer; 10-20-2010 at 08:54 AM. Reason: Added ticket number

10-26-2010, 02:03 PM	#8
Leep Guru Posts: 738 Karma: 1012257 Join Date: Jun 2008 Location: Near Seattle Device: kindle1, K3, K3G (thanks MR), iTouch, Kindle Touch	Not sure anyone realizes how fabulous these plugins are. They eliminate the need to install both python and pycrypto. Calibre does it all. Profound thanks to DiapDealer. A couple of easy steps and you are there. __________________ Liberate all ebooks!

10-30-2010, 03:43 PM	#14
kovidgoyal Creator of calibre Posts: 22,515 Karma: 2944574 Join Date: Oct 2006 Location: Mumbai, India Device: Various	you're welcome __________________ Get calibre Notice to all: I can not provide assistance with DRM removal, for legal reasons, so please do not contact me about it.

10-19-2010, 11:33 AM	#1
DiapDealer Grand Sorcerer Posts: 6,840 Karma: 23400772 Join Date: Jan 2010 Device: Kindle Fire HD, Kindle 2	Epub plugin dev I have a plugin that modifies epubs on import. It seems to work fine, but the cover thumbnail does not show (nor is the cover image present in the library folder) after the successful import. If I open the metadata editor and click on the "set the cover from the selected format" button, it correctly extracts the cover image and the thumbnail shows when browsing the library. If I re-import the modified epub, it finds the cover image just fine... which leads me to believe it's a priority/order of operation type issue. When does Calibre attempt to extract the Epub cover in relation to import plugins? If it happens before any import plugins, is there a way to force Calibre to repeat the cover extraction routine from within my plugin? It's a picky little detail, but I'd rather not have to click that "set the cover from the selected format" button every time I import an epub. Last edited by DiapDealer; 10-19-2010 at 11:36 AM.

10-23-2010, 03:04 AM	#7
pchrist7 Addict Posts: 378 Karma: 6476 Join Date: Aug 2010 Location: Denmark Device: Kindle 3 3G+Wifi	And Thanx TomF ! I missed that

10-27-2010, 08:22 PM	#10
sherman Addict Posts: 256 Karma: 6566 Join Date: Aug 2008 Location: New Plymouth - NZ Device: Sony PRS-505/SC, B&N Nook, Sony PRS-650/BC, Kobo Glo	The plugins in question should be listed under File type plugins. See the included readme files to find how to configure them. Once configured, they should do their work when you add a book to calibre.

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