Crate tuirealm_derive 

tuirealm_derive

tuirealm_derive provides the derive macro which automatically implements MockComponent for a tui-realm component.

tuirealm_derive is a crate which implements the procedural macro MockComponent which can be used to automatically implement the MockComponent trait for a tui-realm Component. Indeed, as you already know if you’re a tui-realm user, you’ve got two kind of component entities:

• MockComponent: generic graphic component which is not bridged to the application and is “reusable”
• Component: which uses a MockComponent as “backend” and is bridged to the application using the Event -> Msg system.

The Component wraps the MockComponent along with additional states. Since Component MUST implement MockComponent, we need to implement the mock component trait too, which in most of the cases it will just call the MockComponet methods on the inner component field. This is obviously kinda annoying to do for each component. That’s why I implemented this procedural macro, which will automatically implement this logic on your component.

So basically instead of implementing MockComponent for your components, you can just do as follows:

#[derive(MockComponent)]
pub struct IpAddressInput {
  component: Input,
}

With the directive #[derive(MockComponent)] we don’t have to implement the mock component trait.

❗ In order to work, the procedural macro requires you to name the “inner” mock component as component as I did in the example.

If we give a deeper look at the macro, we’ll see that what it does is:

impl MockComponent for IpAddressInput {
    fn view(&mut self, frame: &mut Frame, area: Rect) {
        self.component.view(frame, area);
    }

    fn query(&self, attr: Attribute) -> Option<AttrValue> {
        self.component.query(attr)
    }

    fn attr(&mut self, query: Attribute, attr: AttrValue) {
        self.component.attr(query, attr)
    }

    fn state(&self) -> State {
        self.component.state()
    }

    fn perform(&mut self, cmd: Cmd) -> CmdResult {
        self.component.perform(cmd)
    }
}

Get Started

In order to get started with tuirealm_derive all you need to do is to add tui-realm to your dependencies and enable the derive feature if needed.

If you’re using the default features:

[dependencies]
tuirealm = "^2.0.0"

If you’re not using the default features, be sure to enable the derive feature:

[dependencies]
tuirealm = { version = "^2.0.0", default-features = false, features = ["derive", "crossterm"] }

Then you need to include tuirealm in your project using the macro use directive:

src/lib.rs

#[macro_use]
extern crate tuirealm;

and finally derive MockComponent on your components:

#[derive(MockComponent)]
pub struct MyComponent {
  component: MyMockComponentImpl,
}

❗ In order to work, the procedural macro requires you to name the “inner” mock component as component as I did in the example.

And ta-dah, you’re ready to go 🎉

Derive Macros

MockComponent