This project began as a port of the html_to_plaintext logic from github.com/premailer/premailer and applies the same basic set of rules for generating a text/plain copy of an email, given the text/html version
myHTML := `<html><body>Hello World</body></html>`
myPlaintext := textplain.Convert(myHTML, textplain.DefaultLineLength)By default it applies a word wrapping algorithm that is also supplied standalone.
wrapped := textplain.WordWrap("hello world, here is some text", 15)Two plaintexters are supplied:
converter := textplain.NewTreeConverter()Uses the x/net/html package to parse the supplied html into a tree, and performs a single-pass conversion to plaintext. This is the best performing option, and recommended for general usage.
The library still includes the older converter option
converter := textplain.NewRegexpConverter()is the most "true to premailer" implementation, and uses regular expressions, which is largely problematic as it needs to both compile those regexps and regular expressions in the Go world use mutexes which limit concurrency