zeyn 0.0.8

Rust web framework for data heavy applications, written by AI agents and reviewed by people
Documentation 
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//! Hover previews of cards and list rows ([`super::ImageCard::preview`],
//! [`super::ListItem::preview`]): the attribute that names the screen `preview.js` loads.

use super::widgets::encode;
use crate::render::escape;
use serde_json::Value as Json;

/// A screen shown in a preview: its name and params.
pub(crate) type PreviewTarget = Option<(&'static str, Json)>;

/// The ` data-zeyn-preview="..."` attribute of a card link: the address of the screen fragment
/// below the app base, or nothing without a preview.
pub(crate) fn preview_attr(target: &PreviewTarget) -> String {
    let Some((screen, params)) = target else {
        return String::new();
    };
    let query = if params.is_null() {
        String::new()
    } else {
        format!("?params={}", encode(&params.to_string()))
    };
    format!(
        r#" data-zeyn-preview="{}""#,
        escape(&format!("/_zeyn/screen/{screen}{query}"))
    )
}