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import { string_literal } from '../utils/stringify.js';
import add_to_set from '../utils/add_to_set.js';
import Node from './shared/Node.js';
import Expression from './shared/Expression.js';
import { x } from 'code-red';
import compiler_warnings from '../compiler_warnings.js';
/** @extends Node<'Attribute' | 'Spread', import('./Element.js').default> */
export default class Attribute extends Node {
/** @type {import('./shared/TemplateScope.js').default} */
scope;
/** @type {string} */
name;
/** @type {boolean} */
is_spread;
/** @type {boolean} */
is_true;
/** @type {boolean} */
is_static;
/** @type {import('./shared/Expression.js').default} */
expression;
/** @type {Array<import('./Text.js').default | import('./shared/Expression.js').default>} */
chunks;
/** @type {Set<string>} */
dependencies;
/**
* @param {import('../Component.js').default} component
* @param {import('./shared/Node.js').default} parent
* @param {import('./shared/TemplateScope.js').default} scope
* @param {import('../../interfaces.js').TemplateNode} info
*/
constructor(component, parent, scope, info) {
super(component, parent, scope, info);
this.scope = scope;
if (info.type === 'Spread') {
this.name = null;
this.is_spread = true;
this.is_true = false;
this.expression = new Expression(component, this, scope, info.expression);
this.dependencies = this.expression.dependencies;
this.chunks = null;
this.is_static = false;
} else {
this.name = info.name;
this.is_true = info.value === true;
this.is_static = true;
this.dependencies = new Set();
this.chunks = this.is_true
? []
: info.value.map((node) => {
if (node.type === 'Text') return node;
this.is_static = false;
const expression = new Expression(component, this, scope, node.expression);
add_to_set(this.dependencies, expression.dependencies);
return expression;
});
}
if (this.dependencies.size > 0) {
parent.cannot_use_innerhtml();
parent.not_static_content();
}
// TODO Svelte 5: Think about moving this into the parser and make it an error
if (
this.name &&
this.name.includes(':') &&
!this.name.startsWith('xmlns:') &&
!this.name.startsWith('xlink:') &&
!this.name.startsWith('xml:')
) {
component.warn(this, compiler_warnings.illegal_attribute_character);
}
}
get_dependencies() {
if (this.is_spread) return this.expression.dynamic_dependencies();
/** @type {Set<string>} */
const dependencies = new Set();
this.chunks.forEach((chunk) => {
if (chunk.type === 'Expression') {
add_to_set(dependencies, chunk.dynamic_dependencies());
}
});
return Array.from(dependencies);
}
/** @param {any} block */
get_value(block) {
if (this.is_true) return x`true`;
if (this.chunks.length === 0) return x`""`;
if (this.chunks.length === 1) {
return this.chunks[0].type === 'Text'
? string_literal(/** @type {import('./Text.js').default} */ (this.chunks[0]).data)
: /** @type {import('./shared/Expression.js').default} */ (this.chunks[0]).manipulate(
block
);
}
let expression = this.chunks
.map(
/** @param {any} chunk */ (chunk) =>
chunk.type === 'Text' ? string_literal(chunk.data) : chunk.manipulate(block)
)
.reduce((lhs, rhs) => x`${lhs} + ${rhs}`);
if (this.chunks[0].type !== 'Text') {
expression = x`"" + ${expression}`;
}
return expression;
}
get_static_value() {
if (!this.is_static) return null;
return this.is_true
? true
: this.chunks[0]
? // method should be called only when `is_static = true`
/** @type {import('./Text.js').default} */ (this.chunks[0]).data
: '';
}
should_cache() {
return this.is_static
? false
: this.chunks.length === 1
? // @ts-ignore todo: probably error
this.chunks[0].node.type !== 'Identifier' || this.scope.names.has(this.chunks[0].node.name)
: true;
}
}
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