Removing Theia Context menu items on conditional basis

[Shulabh-Prakash]

I need to remove some specific context menu items (such as "Select for Compare," "Copy Path," etc.) based on certain conditions related to the URI. Specifically, I want to conditionally hide or remove these items based on the URI that’s being used. Is there a way to achieve this.
Any help or pointers on how to approach this would be greatly appreciated!

[msujew]

Hey @Shulabh-Prakash,

you will need to unregister the the associated commands. See here for the command used in the Copy Path context menu entry:

theia/packages/navigator/src/browser/navigator-contribution.ts

Lines 399 to 402 in c8ed498

	registry.registerMenuAction(NavigatorContextMenu.CLIPBOARD, {
	commandId: CommonCommands.COPY_PATH.id,
	order: 'c'
	});

After unregistering them, you can register a new handler for the command, that uses an isEnabled function to ensure that the command is only enabled/part of the context menu if the URI satisfies a certain condition. See for an example:

theia/packages/navigator/src/browser/navigator-contribution.ts

Line 234 in c8ed498

isEnabled: uri => !!this.workspaceService.getWorkspaceRootUri(uri),

[Shulabh-Prakash]

Hii @msujew ,
I have a question regarding the process of changing a command’s visibility and enabled state.
So, if I want to change a command such as one below

From my understanding, in order to update the isVisible and isEnabled properties, I would need to unregister the command from its current registration and then re-register it with the desired changes.

However, it seems like this might require duplicating the entire execute function. Is there a more efficient way to achieve this, where I don’t have to duplicate the execute function while updating these properties?

Looking forward to your insights!

[msujew]

I guess you could use the getAllHandlers method of the CommandRegistry and override the isEnabled function field directly. However, I'm not sure how well this works in combination with the underlying UriAwareCommandHandler.