Epub to Epub convertion, Changes in css

[mmat1]

Hello,

when converting an epub (made by sigil) to an epub, i noticed that many styles are added; actually every tag has now its own callibre??- style.

Is there any way to adjust the things, callibre is doing here ? Something like have callibre avoid specific attributes or values which are an issue an a certain reader ?

[kovidgoyal]

Use the filter css options in calibre.

[DiapDealer]

Originally Posted by mmat1

Something like have callibre avoid specific attributes or values which are an issue an a certain reader ?

If it's a known issue, choosing the appropriate output profile should allow calibre to take issues like that into account during the conversion. If it's an unknown issue/device... well that's probably where this all needs to begin.

EDIT: and of course what Kovid suggested would be much easier overall.

[mmat1]

Originally Posted by DiapDealer

If it's a known issue, choosing the appropriate output profile should allow calibre to take issues like that into account during the conversion. If it's an unknown issue/device... well that's probably where this all needs to begin.

EDIT: and of course what Kovid suggested would be much easier overall.

Thanks (i'am as blind as a mole...)

[kovidgoyal]

I'd be very surprised if a CSS rule caused a device to not work. Every epub rendering implementation that I've come across simply ignores CSS rules it cannot handle. You can have css rules that cause ugly/unreadable text because of bugs in the redering engine, but that's about the worst you will get.

[mmat1]

Originally Posted by kovidgoyal

I'd be very surprised if a CSS rule caused a device to not work.

Yes, you're right, this should not happen, but it does ...

I solved an issue with the Acer Lumiread where removing the "body { background-color: #800000; }" stops the reader crashing ! on opening the epub. I'm shure that in this example some worse circumstances come together, but it shows, that readers not always do, what they should do ...

By now i'm working on an issue where several css-styles are ignored and i suspect , that a "{ display: list-style }", which calibre inserts, is maybe the reason for the failure on a "Prestigio" device (but only here, nowhere else....). We are going to test this.

[theducks]

Originally Posted by mmat1

Yes, you're right, this should not happen, but it does ...

I solved an issue with the Acer Lumiread where removing the "body { background-color: #800000; }" stops the reader crashing ! on opening the epub. I'm shure that in this example some worse circumstances come together, but it shows, that readers not always do, what they should do ...

By now i'm working on an issue where several css-styles are ignored and i suspect , that a "{ display: list-style }", which calibre inserts, is maybe the reason for the failure on a "Prestigio" device (but only here, nowhere else....). We are going to test this.

what does it do when you use the (valid) color name: maroon instead of the color number?

[mmat1]

Originally Posted by theducks

what does it do when you use the (valid) color name: maroon instead of the color number?

Good question. I never tried. I was just glad to get rid of the thing, after a tedious series of trial and error. Today I can't reproduce the fault. Meanwhile I had to rebuild the acer from factory-settings, so that the general conditions are not the same anymore. As I told, there were probable some bad circumstances which work together.

[JSWolf]

Originally Posted by mmat1

Hello,

when converting an epub (made by sigil) to an epub, i noticed that many styles are added; actually every tag has now its own callibre??- style.

Is there any way to adjust the things, callibre is doing here ? Something like have callibre avoid specific attributes or values which are an issue an a certain reader ?

What's wrong with fixing what needs to be fixed as long as you have the ePub already loaded into Sigil? No changes to the CSS and no risk of messing things up.

[cybmole]

Originally Posted by kovidgoyal

Use the filter css options in calibre.

what/where is that please, and what does it do exactly.

I just re-examined all the conversion options preferences screens

I see nothing called filter css ?

[DiapDealer]

Originally Posted by cybmole

what/where is that please, and what does it do exactly.

I just re-examined all the conversion options preferences screens

I see nothing called filter css ?

In the "Look & Feel" section of the conversion options... there is an "Extra CSS" tab and a "Filter Style Information" tab. Mousing over the various options will present you with a tool-tip about it's function.

[cybmole]

Originally Posted by DiapDealer

In the "Look & Feel" section of the conversion options... there is an "Extra CSS" tab and a "Filter Style Information" tab. Mousing over the various options will present you with a tool-tip about it's function.

I see it now, thanks - on common options preferences page

I've used extra CSS for a long time, but never spotted that there was another tab alongside!