Make hyperlinks appear underlined only on mouse hover in RichTextLabel (and the editor help)

[setanarut]

Describe the project you are working on:

Describe the problem or limitation you are having in your project:
Permanent underlines makes text difficult to read in editor help pages. I have trouble reading.

Describe the feature / enhancement and how it helps to overcome the problem or limitation:
Make hyperlinks appear underlined only on mouse hover in editor help pages.

Describe how your proposal will work, with code, pseudocode, mockups, and/or diagrams:
for example docs.godotengine.org underlined links;

If this enhancement will not be used often, can it be worked around with a few lines of script?:
No
Is there a reason why this should be core and not an add-on in the asset library?:
Yes

[Calinou]

For the record, this needs to be implemented in the RichTextLabel node. Note that RichTextLabel is currently being refactored, so implementing this right away may not be a good idea.

I think a mix of both ways is the best option accessibility-wise:

• Use an underline with 50% opacity for non-hovered links.
• Use an underline with 100% opacity for hovered links.

This way, you get visual feedback when hovering a link and you can determine whether something is a link without relying on color alone.

[setanarut]

@Calinou

Link style of Google and Github (does not overlap);

[Calinou]

@hazarek That's an entirely different issue, which can be fixed by increasing the underline offset (underline_spacing custom constant). Note that in 4.0, the font file's underline offset will be added to this constant: godotengine/godot#31086

[setanarut]

@hazarek That's an entirely different issue, which can be fixed by increasing the underline offset (underline_spacing custom constant). Note that in 4.0, the font file's underline offset will be added to this constant: godotengine/godot#31086

godotengine/godot#31086 these screenshots have same issue, should be a little lower and more line-height

[setanarut]

The problem is that it's a permanent underline, you're trying to rediscover gravity.