modal.rs
| 1 | //! The one modal shell, a native `<dialog>`. |
| 2 | //! |
| 3 | //! Opened with `showModal()`, so the browser supplies the backdrop |
| 4 | //! (`::backdrop`), the focus trap, inertness for the rest of the page, the |
| 5 | //! top layer, and Escape-to-close. None of that is hand-rolled here. |
| 6 | |
| 7 | use leptos::prelude::*; |
| 8 | use wasm_bindgen::JsCast; |
| 9 | use web_sys::MouseEvent; |
| 10 | |
| 11 | #[component] |
| 12 | pub fn Modal( |
| 13 | /// Classes for the card, appended to `modal` (e.g. `"card picker"`). |
| 14 | #[prop(into)] |
| 15 | class: String, |
| 16 | /// Runs when the dialog asks to close: Escape, or a backdrop click. |
| 17 | /// The owner clears its own state, which unmounts the dialog. |
| 18 | on_close: Callback<()>, |
| 19 | children: Children, |
| 20 | ) -> impl IntoView { |
| 21 | let dialog: NodeRef<leptos::html::Dialog> = NodeRef::new(); |
| 22 | Effect::new(move |_| { |
| 23 | if let Some(el) = dialog.get() { |
| 24 | // `show_modal`, never `show`: only the modal form gets the top |
| 25 | // layer, the backdrop and the focus trap. |
| 26 | let _ = el.show_modal(); |
| 27 | } |
| 28 | }); |
| 29 | view! { |
| 30 | <dialog |
| 31 | node_ref=dialog |
| 32 | class="modal-host" |
| 33 | // Fires once the browser has closed the dialog, which Escape |
| 34 | // does on its own. Tell the owner so its state clears too. |
| 35 | // Unmounting an open dialog does not fire this, so the close |
| 36 | // path the owner drives cannot loop back here. |
| 37 | on:close=move |_| on_close.run(()) |
| 38 | // A click on the backdrop targets the <dialog> itself; a click |
| 39 | // anywhere inside targets that element instead. The card below |
| 40 | // carries the padding, so the dialog box is never a click |
| 41 | // target except on the backdrop. |
| 42 | on:click=move |ev: MouseEvent| { |
| 43 | let Some(el) = dialog.get() else { return }; |
| 44 | let on_backdrop = ev |
| 45 | .target() |
| 46 | .and_then(|t| t.dyn_into::<web_sys::Node>().ok()) |
| 47 | .is_some_and(|t| el.is_same_node(Some(&t))); |
| 48 | if on_backdrop { |
| 49 | on_close.run(()); |
| 50 | } |
| 51 | } |
| 52 | > |
| 53 | <div class=format!("modal {class}")>{children()}</div> |
| 54 | </dialog> |
| 55 | } |
| 56 | } |
| 57 |