Desktop: Resolves #9468: Add support for changing text colors in rich text editor

[personalizedrefrigerator]

Summary

Adds support for changing text colors in TinyMCE.

Resolves #9468.

Notes & known issues

• Changing the color of text within inline code is not supported currently. At present, it works within the editor, but Turndown discards the formatting.
• When changing the color of text in the first line (and the note is auto-titled), the title becomes something similar to: <span style="color: #2DC26B;">This</span> is a <span style="color: #e67e23;">tes

Screenshots

Testing

1. Create a new, empty note.
2. Type This is a test.
3. Select test and change its color to orange.
4. Switch to the markdown viewer.
5. Verify that the text is still orange.
6. Re-open the rich text editor.
7. Select This and change its color to green.
8. Switch to the markdown viewer.
9. Verify that both colors are still present.

This has been successfully tested on Ubuntu 23.10.

[personalizedrefrigerator]

Perhaps a better option here would be to use a turndown option perserveTextColors (similar to what we do with nested tables).

It may also make sense to put rules.foregroundColor somewhere else (turndown-plugin-gfm?).

[laurent22]

Yes I wonder about this too. We can't have it enabled by default as it would apply to email-to-note or clipped web pages, but when switching between the rich text and Markdown I think that would make sense.

And it means we have a more generic solution without needing an extra "joplin-color" attribute

[laurent22]

Looks good, thanks Henry!

[Inntel-Joplin]

Hi, I just installed Joplin and I am looking to use this new feature but can't find any trace of it in the current version. Is this scheduled for the next version or is there a particular way to enable it. I just started migrating from Evernote and text colors is the one feature that Joplin is missing for me to use it. I am using the Windows version.

[personalizedrefrigerator]

Hi, I just installed Joplin and I am looking to use this new feature but can't find any trace of it in the current version. Is this scheduled for the next version or is there a particular way to enable it. I just started migrating from Evernote and text colors is the one feature that Joplin is missing for me to use it. I am using the Windows version.

This feature should be in Joplin ≥ 2.14.6, which is currently in pre-release.