75 lines
2.1 KiB
Rust
75 lines
2.1 KiB
Rust
use super::props::Props;
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use crate::{prelude::*, render};
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use yew::{prelude::*, virtual_dom::VNode};
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pub struct TextArea {
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link: ComponentLink<Self>,
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state: String,
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props: Props,
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}
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#[derive(Debug)]
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pub struct InputChange(ChangeData);
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impl Component for TextArea {
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type Message = InputChange;
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type Properties = Props;
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fn create(props: Self::Properties, link: ComponentLink<Self>) -> Self {
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let state = extract_state(&props);
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Self { props, state, link }
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}
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fn update(&mut self, msg: Self::Message) -> ShouldRender {
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if let InputChange(ChangeData::Value(value)) = msg {
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self.state = value.clone();
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self.props.on_change.emit(value);
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true
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} else {
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false
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}
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}
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fn change(&mut self, props: Self::Properties) -> ShouldRender {
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let should_render = render_if_ne(&mut self.props, props);
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if should_render {
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self.state = extract_state(&self.props);
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}
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should_render
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}
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fn view(&self) -> Html {
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let prefix = vec!["form-control", &valid_as_class(&self.props.valid)];
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let html = html! {
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<textarea
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readonly=self.props.readonly
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onchange=self.link.callback(|evt| InputChange(evt))
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>
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{ &self.state }
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</textarea>
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};
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render::render_with_prefix(&self.props, prefix, html)
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}
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}
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fn extract_state(props: &Props) -> String {
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if props.children.is_empty() {
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props.value.clone()
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} else {
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props.children.iter().fold(String::new(), |mut buf, node| {
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if let VNode::VText(text) = node {
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buf.push_str(&text.text);
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} else if let VNode::VList(list) = node {
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let text = list.iter().fold(String::new(), |mut buf, node| {
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if let VNode::VText(text) = node {
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buf.push_str(&text.text)
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}
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buf
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});
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buf.push_str(&text);
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}
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buf
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})
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}
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}
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