About the background in ebook-viewer

Elancrom · 11-19-2015, 10:57 AM

Hello,
I am using Calibre Portable 2.37, in ebook-viewer -> options -> user stylesheet there is an option for set the background, example:
background-image:url("file:///d:/calibre portable/mybackground.jpg");
The path is absolute and I can't figure how to make it relative, so always having my background image irrespective from path I am running Calibre.

Is it possible to have a relative path for the background image?

Thanks in advance

(sorry for my bad english)

eschwartz · 11-19-2015, 11:22 AM

Well, I've never tried this particularly, but the PortableApps.com edition of calibre uses the standard PAF launcher which (among other things) fixes filepaths when the drive letter changes.

Presumably, it will fix this one too, if not then that is a bug in their launcher code and they'll fix it.

As for the "official" calibre portable, it doesn't really mess with the configuration at all (it merely uses the config relocation environment variables, and passes the --with-library switch) so you are probably out of luck with it.

BetterRed · 11-19-2015, 03:28 PM

Sadly one can't use environment variables in file system uri's because the '%' is used for character encoding (eg space %20)

Maybe one day the IETF will devise a way to overcome that restriction, or MS will allow substitution of the '%envvarname%' convention by say a '$envvarname' convention. Although I'm not holding my breath on either.

You could write some javascript in the CSS. There's some VBA code somewhere that addresses the issue - I have seen it used in Excel macro's. Conversion of VBA to JS is doable.

BR

eschwartz · 11-19-2015, 03:59 PM

Well, I remember being able to type environment variables into Windows Explorer...

BetterRed · 11-19-2015, 04:39 PM

Yes I use it all the time - in fact my file mangler offers me a list of them in its address bar - but that's native windows which is not IETF RFC 3886 compliant.

Windows is not compliant, because 1808, which 3886 obsoletes, wasn't published until 1995! The %---% convention was in CP/M (Kildall may have copied it from TOPS 10 or RT/11 - or even CMS), from there it went into QDOS which begat MS/PC-DOS in 1981!

And here we are today with... what we've got and not got.

BR

PeterT · 11-19-2015, 05:00 PM

I remember using both TOPS 10 and RT/11

eschwartz · 11-19-2015, 05:10 PM

Wouldn't matter anyway, because URLs are literal AFAIk unless the program in question explicitly parses it and replaces variables.

Elancrom · 11-20-2015, 07:40 AM

It seems I am out of luck

It's not a big deal tough, I think I will try the PortableApps version

Thanks

for your help and to Kovid for this great program

11-19-2015, 10:57 AM	#1
Elancrom Junior Member Posts: 8 Karma: 10 Join Date: Sep 2013 Location: Spain Device: K4 NT	About the background in ebook-viewer Hello, I am using Calibre Portable 2.37, in ebook-viewer -> options -> user stylesheet there is an option for set the background, example: background-image:url("file:///d:/calibre portable/mybackground.jpg"); The path is absolute and I can't figure how to make it relative, so always having my background image irrespective from path I am running Calibre. Is it possible to have a relative path for the background image? Thanks in advance (sorry for my bad english)

11-19-2015, 04:39 PM	#5
BetterRed null operator (he/him) Posts: 21,630 Karma: 29710510 Join Date: Mar 2012 Location: Sydney Australia Device: none	Yes I use it all the time - in fact my file mangler offers me a list of them in its address bar - but that's native windows which is not IETF RFC 3886 compliant. Windows is not compliant, because 1808, which 3886 obsoletes, wasn't published until 1995! The %---% convention was in CP/M (Kildall may have copied it from TOPS 10 or RT/11 - or even CMS), from there it went into QDOS which begat MS/PC-DOS in 1981! And here we are today with... what we've got and not got. BR Last edited by BetterRed; 11-19-2015 at 06:05 PM. Reason: spelling

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11-19-2015, 11:22 AM	#2
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Well, I've never tried this particularly, but the PortableApps.com edition of calibre uses the standard PAF launcher which (among other things) fixes filepaths when the drive letter changes. Presumably, it will fix this one too, if not then that is a bug in their launcher code and they'll fix it. As for the "official" calibre portable, it doesn't really mess with the configuration at all (it merely uses the config relocation environment variables, and passes the --with-library switch) so you are probably out of luck with it.

11-19-2015, 03:28 PM	#3
BetterRed null operator (he/him) Posts: 21,630 Karma: 29710510 Join Date: Mar 2012 Location: Sydney Australia Device: none	Sadly one can't use environment variables in file system uri's because the '%' is used for character encoding (eg space %20) Maybe one day the IETF will devise a way to overcome that restriction, or MS will allow substitution of the '%envvarname%' convention by say a '$envvarname' convention. Although I'm not holding my breath on either. You could write some javascript in the CSS. There's some VBA code somewhere that addresses the issue - I have seen it used in Excel macro's. Conversion of VBA to JS is doable. BR

11-19-2015, 03:59 PM	#4
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Well, I remember being able to type environment variables into Windows Explorer...

11-19-2015, 05:00 PM	#6
PeterT Grand Sorcerer Posts: 13,306 Karma: 78876004 Join Date: Nov 2007 Location: Toronto Device: Libra H2O, Libra Colour	I remember using both TOPS 10 and RT/11

11-19-2015, 05:10 PM	#7
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Wouldn't matter anyway, because URLs are literal AFAIk unless the program in question explicitly parses it and replaces variables.

11-20-2015, 07:40 AM	#8
Elancrom Junior Member Posts: 8 Karma: 10 Join Date: Sep 2013 Location: Spain Device: K4 NT	It seems I am out of luck It's not a big deal tough, I think I will try the PortableApps version Thanks for your help and to Kovid for this great program

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