[lsp4e-dev] Implementing inactive code highlighting

[Nathan Ridge <zeratul976@xxxxxxxxxxx>]

Hi all,

We would like to implement inactive code highlighting (greying out of lines in inactive preprocessor branches) in lsp4e-cpp. The CQuery language server has support for this, but we are trying to figure out how to implement the greying out in the Generic Editor.

The way CDT's C++ editor, which also supports this feature, implements it is by installing a LineBackgroundListener on the editor's StyledText widget. Would it be appropriate for us to do the same thing in the Generic Editor? I ask in part because I'm not sure if manipulating the Generic Editor's StyledText widget is a supported / intended way of interacting with the Generic Editor.

Or should we use the presentation reconciler for this purpose? Or something else? Any suggestions would be appreciated.

Thanks,
Nate