epub | Media library

If you just save the page number, your code will break once a user changes the font size of the book or resize the reader. In that case, your total page number can increase/decrease and just relying on the page number could lead you to the wrong page or you might end up going out of bounds (your page number > amount pages of book).

A safe way to save the page would be to save the CFI position string of that page (instead of the page number). These strings look kinda like this: epubcfi(/6/4[chap01ref]!/4[body01]/10[para05]/2/1:3).

The first thing you'd have to do is decide which color to change, the foreground or background. What I'd probably do is decide which color is the furthest from white or black because its value could be changed the most.

But before that, you have to figure out which color is light and which is dark. Fortunately, that's pretty easy. Since white is #fff and black is #000, whichever color value is the smallest (ie, closer to #000) is the darker one.

Then just subtract the light color from #fff (hexadecimal subtraction or convert the colors to decimal) and compare that to the darker color.

If the subtracted value for the light color is smaller than the dark color, then the light color is closer to white than the darker color is to black so you'll want to start modifying the darker color.

If the subtracted value for the light color is larger than the dark color, then the light color is further from white than the darker color is from black so you'll want to start modifying the light color.

When changing the color, just add or subtract 1 from each RGB component. Add 1 if you're making the light color lighter or subtract 1 if you're making the dark color darker.

After you add or subtract 1 from each RGB, compute the luminance contrast to see if you're above 4.5 (if the font is small), or above 3 (if the font is large - where "large" is defined as 14pt bold or 18pt normal).

The contrast ratio formula is kind of messy but doable.

I found this answer on tex.stackexchange.com which brought me on the right track to solve my problem.

Here is what I am doing.

1. Create boxes.lua with following function:

First I tried to fix it the same way like in this Github issue: https://github.com/samuelcolvin/pydantic/issues/2572 However, this did not work. So I simply went to the file under appdata\local\programs\python\python39\lib\site-packages\_pyinstaller_hooks_contrib\hooks\stdhooks\hook-pydantic.py and edited the file in order to remove the version checks (simply removed the if conditions and always executed the content), which fixed the errors.

It is not the prettiest solution, but at least it worked

Yes, it will not work. As its last commit was in 2019 and between 2019 to 2022 react-native has gone through many changes. So, that package is now deprecated. So you have to switch to a new package. You can use the new React Native ePub Reader

The link to the article abstract appears to be a relative link (from the exception). /doi/abs/10.1080/03066150.2021.1956473 doesn't start with https:// or http://.

You should append this relative URL to the base URL of the website (i.e. if the base URL is "https://www.tandfonline.com", you can

For option one this way works with using DOMDocument(): https://www.php.net/manual/de/class.domdocument.php

From the dart:html documentation:

HTML elements and other resources for web-based applications that need to interact with the browser and the DOM (Document Object Model).

From the package:html package description:

APIs for parsing and manipulating HTML content outside the browser.

In other words, dart:html is used for Dart for the web to interact with a web browser. package:html is an HTML parser without a web browser.

Check this fiddle. You can use flexbox for this scenario. Add these properties to your topnav: