Javadoc generated by Dokka does not show up in quick documentation lookup in Intellij IDEA

[vbieleny]

Describe the bug
When a Javadoc generated by Dokka is imported in IntelliJ IDEA or Android Studio, it does not show up in quick documentation lookup for Kotlin files. It does show up for Java files, but only for methods and not for classes.

Expected behaviour
When I do quick documentation lookup with Ctrl + Q for some part of a code, I should be able to see Javadoc associated with it.

Screenshots
This is how the quick documentation lookup shows up

This is how it should show up

Intellj IDEA does have Javadoc JAR associated with the library

To Reproduce
Example project: https://github.com/vbieleny/dokka-javadoc-test

1. Open the project in Intellij IDEA
2. Execute task publishToMavenLocal in library module
3. Open App.kt in app module and check the quick documentation lookup by pressing Ctrl + Q for the relevant code

Dokka configuration

dokkaJavadoc {
    dokkaSourceSets {
        named("main") {
            sourceRoots.from(file("src/main/java"))
        }
    }
}

Installation

• Operating system: Windows
• Build tool: Gradle v7.1.1
• Dokka version: 1.5.0

Additional context
This happens in IntelliJ IDEA as well as in Android Studio, while generating Javadoc by using standard Javadoc tool works fine and documentation shows up in quick documentation lookup (only for Java files of course).

Are you willing to provide a PR?
If it's a bug, then I might, but I would need help with it.

[IgnatBeresnev]

Some investigation into the current behaviour can be found in #2297 (comment)

[IgnatBeresnev]

Closing this in favour of an older issue with more likes and information: #215