Add codelens and command to register/unregister catalog

[JessicaJHee]

Fixes redhat-developer/vscode-xml#572

Signed-off-by: Jessica He jhe@redhat.com

[angelozerr]

It looks promising @JessicaJHee !

I noticed that you created an custom command on client side for only XML catalog.

My idea was to do like we did for vscode-microprofile, to provide a generic command which updates a given configuration on client side.

• in vscode-microprofile side, we have https://github.com/redhat-developer/vscode-microprofile/blob/7d6cac22917cb47af8c04151269432b9999dd2be/src/lsp-commands.ts#L24
• on LS side, we update settings with code action https://github.com/eclipse/lsp4mp/blob/fd508c6b2efc5c9b75e3355a6c88ef427dcff4b1/microprofile.ls/org.eclipse.lsp4mp.ls/src/main/java/org/eclipse/lsp4mp/commons/MicroProfileCodeActionFactory.java#L91

The main idea is to provide a generic command which update settings on client side. If you think it is doable, it should be nice otherwise let's give up my idea, but I think if we have more and more codeaction, codelens which need to update settings we should change that.

[angelozerr]

@JessicaJHee please fix conflicts

[angelozerr]

It should be really nice to refresh coelens when xml.catalogs changed (on server side).

To do that I suggets to add this following code after https://github.com/eclipse/lemminx/blob/de9c702be26f5380be84b3a38d6d16f6913011df/org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/XMLTextDocumentService.java#L590

if (context.isRefreshCodeLenses()) {
	xmlLanguageServer.getLanguageClient().refreshCodeLenses();
}

isRefreshCodeLenses() is a new method which returns a boolean to know if codelens must be refreshed or not when a settings a changed.

After https://github.com/eclipse/lemminx/blob/74689af7f882732c9e59f27ce23ea0652fe2dbc5/org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/extensions/contentmodel/ContentModelPlugin.java#L139

you update the refresh code lens flag

context.setRefreshCodeLenses(true)

[angelozerr]

It works like a charm. Thanks @JessicaJHee !