[Plugin] ConvertAbs2RelCSSValues

[slowsmile]

Plugin Update(v0.1.6):

1. This plugin can now process and convert pixels to em values in the css. My thanks to gregorio and Doitsu for the suggestion.

2. The plugin will not convert px to em values if the pixel values are being used within the following class properties: width, height, max-width, max-height and border.

[DNSB]

I rain into one oddment. The epub I was editing had the following in the CSS:

img.full {
  display: block;
  width: 100%;
  object-fit: contain;
  height: 100vh;
  margin-left: auto;
  margin-right: auto;
}

which triggered:

ValueError: could not convert string to float: ' conta'
Error: could not convert string to float: ' conta'

Since the object-fit line was the only one in the CSS stylesheets that contained the string "conta", I removed it and and the error disappeared

[slowsmile]

@DNSB . . . Thanks for reporting that problem. I've already had a look at the problem and I've put in a fix. I'm testing the fix now. New plugin release soon.

[slowsmile]

@DNSB. . . Regarding your test epub problem -- if I ran my plugin on your test file, it would always fail. But if I first run the cssRemoveUnusedSelectors plugin and then run my plugin on your test file afterwards then it always converts pixels to ems without any problems and with no errors. So the problem with your test epub css seems to be something structural that is not related to my plugin. And if you run the cssRemoveUnusedSelectors plugin prior to running my plugin it always seems to completely remove that problem.

[DNSB]

I went back to the epub I was editing when I noticed the problem. Ran CSSRemoveUnusedSelectors and the error was still present:

Spoiler:

Status: failed

Python version:  3.9.9 (tags/v3.9.9:ccb0e6a, Nov 15 2021, 18:08:50) [MSC v.1929 64 bit (AMD64)] 

Running ConvertAbs2RelCSSValues...Please wait

 -- Write to work dir...C:\Users\David\AppData\Local\Temp\tmp4jdqw_ez\SBsignup.css
 -- Write to work dir...C:\Users\David\AppData\Local\Temp\tmp4jdqw_ez\idGeneratedStyles.css

 >>> ask yesno - convert to long form...False

 -- Processing automatic tasks...
 -- Convert absolute values to relative em values in the CSS
In convertAbs2RelCSSValues()...
 -- Convert absolute to relative values in the CSS
In convertAbs2RelCSSValues()...
 -- Convert absolute to relative values in the CSS
>>>IN INCHES TO EM CALCULATION....
Traceback (most recent call last):
  File "C:\Program Files\Sigil\plugin_launchers\python\launcher.py", line 142, in launch
    self.exitcode = target_script.run(container)
  File "C:\Users\David\AppData\Local\sigil-ebook\sigil\plugins\ConvertAbs2RelCSSValues\plugin.py", line 102, in run
    processAllTasks(bk, WDIR, s_ids, s_fnames)
  File "C:\Users\David\AppData\Local\sigil-ebook\sigil\plugins\ConvertAbs2RelCSSValues\cutils.py", line 29, in processAllTasks
    convertAbs2RelCSSValues(wdir, file)
  File "C:\Users\David\AppData\Local\sigil-ebook\sigil\plugins\ConvertAbs2RelCSSValues\cutils.py", line 182, in convertAbs2RelCSSValues
    points = float(point)
ValueError: could not convert string to float: ' conta'
Error: could not convert string to float: ' conta'

I've attached a scrambled and simplified copy of the epub where I ran into this issue.

[slowsmile]

@DNSB...I can confirm the problem that you reported above although I'm not sure why the plugin didn't do its job -- especially since the original plugin had the correct update version on it. Anyway, your problem or mix-up was probably my error, so my humble apologies for that. I've already fixed that problem so I'll put out another version of this plugin(as v0.1.7) sometime today.

[slowsmile]

Plugin Update(v0.1.7):

Fixed a problem with inches conversion that DNSB reported.

[KevinH]

To protect your intellectual property from being stolen or copied by any external website.

These are python plugins for Sigil. There are lots of them that perform useful functions.

Originally Posted by Paul Collins

Why would I install additional soft if I can convert it online on sites like https://oneconvert.com/?

[DiapDealer]

That's a spammer, Kevin. I'm going to get rid of him/it.