mirror of https://github.com/sveltejs/svelte
44 lines
935 B
44 lines
935 B
import { tokenizer, tokTypes, parseExpressionAt } from 'acorn';
|
|
|
|
export function readEventHandlerDirective ( parser, start, name ) {
|
|
const quoteMark = (
|
|
parser.eat( `'` ) ? `'` :
|
|
parser.eat( `"` ) ? `"` :
|
|
null
|
|
);
|
|
|
|
const expressionStart = parser.index;
|
|
let end = null;
|
|
|
|
let depth = 0;
|
|
for ( const token of tokenizer( parser.remaining() ) ) {
|
|
if ( token.type === tokTypes.parenL ) depth += 1;
|
|
if ( token.type === tokTypes.parenR ) {
|
|
depth -= 1;
|
|
if ( depth === 0 ) {
|
|
end = expressionStart + token.end;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
const expression = parseExpressionAt( parser.template.slice( 0, end ), expressionStart );
|
|
parser.index = expression.end;
|
|
|
|
if ( expression.type !== 'CallExpression' ) {
|
|
parser.error( `Expected call expression`, expressionStart );
|
|
}
|
|
|
|
if ( quoteMark ) {
|
|
parser.eat( quoteMark, true );
|
|
}
|
|
|
|
return {
|
|
start,
|
|
end: parser.index,
|
|
type: 'EventHandler',
|
|
name,
|
|
expression
|
|
};
|
|
}
|