Struct Element 

pub struct Element {
    pub id: u32,
    pub tag: &'static str,
    pub class: Option<String>,
    pub attrs: HashMap<&'static str, String>,
    pub text: Option<String>,
    pub children: Vec<Element>,
    pub handlers: Vec<EventHandler>,
}

The fundamental UI node. Every tag in a view! block becomes one of these.

Fields

id: u32

Unique ID for event routing back from Java → Rust.

tag: &'static str

Tag name: “h1”, “button”, “p”, “img”, “input”, “div”, etc.

class: Option<String>

CSS class string.

attrs: HashMap<&'static str, String>

Generic attributes (src, alt, placeholder, href, …).

text: Option<String>

Text content for leaf nodes.

children: Vec<Element>

Child elements.

handlers: Vec<EventHandler>

Registered event handlers.

Implementations

impl Element

pub fn new(tag: &'static str) -> Self

Create a new element with a unique ID.

pub fn class(self, cls: impl Into<String>) -> Self

Set the class attribute.

pub fn attr(self, key: &'static str, value: impl Into<String>) -> Self

Set a generic attribute.

pub fn text(self, content: impl Into<String>) -> Self

Set text content.

pub fn child(self, child: Element) -> Self

Add a child element.

pub fn on(self, handler: EventHandler) -> Self

Attach an event handler.

pub fn h1() -> Self

<h1>

pub fn h2() -> Self

<h2>

pub fn h3() -> Self

<h3>

pub fn p() -> Self

<p>

pub fn button() -> Self

<button>

pub fn img() -> Self

<img>

pub fn input() -> Self

<input>

pub fn div() -> Self

<div>

pub fn span() -> Self

<span>

pub fn a() -> Self

<a>

pub fn to_json(&self) -> String

Serialise this element tree to JSON for the JNI bridge.

Produces:

{
  "id": 1,
  "tag": "button",
  "class": "primary-btn",
  "text": "Tap me",
  "attrs": {},
  "handlers": ["click"],
  "children": []
}

pub fn to_value(&self) -> Value

Convert to a serde_json::Value recursively.

pub fn collect_handlers(&self, out: &mut Vec<(u32, EventHandler)>)

Collect all elements with their handlers into a flat list. Used by the event dispatcher to find the right handler by element ID.

pub fn debug_render(&self, indent: usize) -> String

Debug render as an indented tag tree (host mode only).

Trait Implementations

impl Debug for Element

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.