Fragment Copy Button conflicts with Doxygen copy button

[CaseyNelson314]

Hi, thanks for the great project!

I found a small problem and would like to report it.

Problem

Using the extension "Fragment Copy Button" conflicts with Doxygen copy button as shown in the screenshot.

You can see the conflict from this page. https://github.com/CaseyNelson314/doxygen-page-demo

The version I am using is Doxygen 1.10.0.

Solution

Set HTML_COPY_CLIPBOARD to NO in Doxyfile. The default is YES.

This option was added in 1.10.0. https://www.doxygen.nl/manual/changelog.html#log_1_10_0

Suggestions

I think we should add a note to extensions.md that HTML_COPY_CLIPBOARD should be NO when using Fragment Copy Button.

Other

This project page is also using Doxygen 1.10.0, yet I am not experiencing any problems. This is probably because the project uses the old Doxygen-generated header.html, which does not contain any clipboard-related code.

In Doxygen 1.10.0, the following code is added when generating header.html

<script type="text/javascript" src="$relpath^clipboard.js"></script>

This is a translated text. Some parts may be difficult to understand. We apologize in advance.

[kitswas]

I was wondering if, with the Doxygen copy button, the "Fragment Copy Button" extension still needs to exists.
If not, deprecating the extension might reduce @jothepro's maintenance load.

See https://github.com/doxygen/doxygen/blob/1822879cdf4a7a08bd75870ea9257bd2946e56ca/templates/html/clipboard.js#L3-L4

[jothepro]

That's a fair question! I will evaluate if the code can be removed.