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63x 63x 63x 63x 63x 5215x 5215x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 5215x 5215x 51x 51x 51x 51x 51x 51x 51x 51x 51x 5215x 5215x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 5215x 5215x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 5215x 5215x 23224x 23224x 5x 5x 5x 5x 5x 5x 5x 5x 5215x 5215x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 5215x 5215x 292x 5215x 5215x 102x 5215x 5215x 217x 217x 5215x 5215x 5215x | /** @import { Expression } from 'estree' */ /** @import { AST, SvelteNode, TemplateNode } from '#compiler' */ /** @import * as Legacy from './types/legacy-nodes.js' */ import { walk } from 'zimmerframe'; import { regex_ends_with_whitespaces, regex_not_whitespace, regex_starts_with_whitespaces } from './phases/patterns.js'; import { extract_svelte_ignore } from './utils/extract_svelte_ignore.js'; /** * Some of the legacy Svelte AST nodes remove whitespace from the start and end of their children. * @param {TemplateNode[]} nodes */ function remove_surrounding_whitespace_nodes(nodes) { const first = nodes.at(0); const last = nodes.at(-1); if (first?.type === 'Text') { if (!regex_not_whitespace.test(first.data)) { nodes.shift(); } else { first.data = first.data.replace(regex_starts_with_whitespaces, ''); } } if (last?.type === 'Text') { if (!regex_not_whitespace.test(last.data)) { nodes.pop(); } else { last.data = last.data.replace(regex_ends_with_whitespaces, ''); } } } /** * Transform our nice modern AST into the monstrosity emitted by Svelte 4 * @param {string} source * @param {AST.Root} ast * @returns {Legacy.LegacyRoot} */ export function convert(source, ast) { const root = /** @type {SvelteNode | Legacy.LegacySvelteNode} */ (ast); return /** @type {Legacy.LegacyRoot} */ ( walk(root, null, { _(node, { next }) { // @ts-ignore delete node.parent; // @ts-ignore delete node.metadata; next(); }, // @ts-ignore Root(node, { visit }) { const { instance, module, options } = node; // Insert svelte:options back into the root nodes if (/** @type {any} */ (options)?.__raw__) { let idx = node.fragment.nodes.findIndex((node) => options.end <= node.start); if (idx === -1) { idx = node.fragment.nodes.length; } // @ts-ignore delete options.__raw__.parent; node.fragment.nodes.splice(idx, 0, /** @type {any} */ (options).__raw__); } /** @type {number | null} */ let start = null; /** @type {number | null} */ let end = null; if (node.fragment.nodes.length > 0) { const first = /** @type {AST.BaseNode} */ (node.fragment.nodes.at(0)); const last = /** @type {AST.BaseNode} */ (node.fragment.nodes.at(-1)); start = first.start; end = last.end; while (/\s/.test(source[start])) start += 1; while (/\s/.test(source[end - 1])) end -= 1; } if (instance) { // @ts-ignore delete instance.parent; // @ts-ignore delete instance.attributes; } if (module) { // @ts-ignore delete module.parent; // @ts-ignore delete module.attributes; } return { html: { type: 'Fragment', start, end, children: node.fragment.nodes.map((child) => visit(child)) }, instance, module, css: ast.css ? visit(ast.css) : undefined }; }, AnimateDirective(node) { return { ...node, type: 'Animation' }; }, // @ts-ignore AwaitBlock(node, { visit }) { let pendingblock = { type: 'PendingBlock', /** @type {number | null} */ start: null, /** @type {number | null} */ end: null, children: node.pending?.nodes.map((child) => visit(child)) ?? [], skip: true }; let thenblock = { type: 'ThenBlock', /** @type {number | null} */ start: null, /** @type {number | null} */ end: null, children: node.then?.nodes.map((child) => visit(child)) ?? [], skip: true }; let catchblock = { type: 'CatchBlock', /** @type {number | null} */ start: null, /** @type {number | null} */ end: null, children: node.catch?.nodes.map((child) => visit(child)) ?? [], skip: true }; if (node.pending) { const first = node.pending.nodes.at(0); const last = node.pending.nodes.at(-1); pendingblock.start = first?.start ?? source.indexOf('}', node.expression.end) + 1; pendingblock.end = last?.end ?? pendingblock.start; pendingblock.skip = false; } if (node.then) { const first = node.then.nodes.at(0); const last = node.then.nodes.at(-1); thenblock.start = pendingblock.end ?? first?.start ?? source.indexOf('}', node.expression.end) + 1; thenblock.end = last?.end ?? source.lastIndexOf('}', pendingblock.end ?? node.expression.end) + 1; thenblock.skip = false; } if (node.catch) { const first = node.catch.nodes.at(0); const last = node.catch.nodes.at(-1); catchblock.start = thenblock.end ?? pendingblock.end ?? first?.start ?? source.indexOf('}', node.expression.end) + 1; catchblock.end = last?.end ?? source.lastIndexOf('}', thenblock.end ?? pendingblock.end ?? node.expression.end) + 1; catchblock.skip = false; } return { type: 'AwaitBlock', start: node.start, end: node.end, expression: node.expression, value: node.value, error: node.error, pending: pendingblock, then: thenblock, catch: catchblock }; }, BindDirective(node) { return { ...node, type: 'Binding' }; }, ClassDirective(node) { return { ...node, type: 'Class' }; }, Comment(node) { return { ...node, ignores: extract_svelte_ignore(node.start, node.data, false) }; }, ComplexSelector(node) { const children = []; for (const child of node.children) { if (child.combinator) { children.push(child.combinator); } children.push(...child.selectors); } return { type: 'Selector', start: node.start, end: node.end, children }; }, Component(node, { visit }) { return { type: 'InlineComponent', start: node.start, end: node.end, name: node.name, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, // @ts-ignore ConstTag(node) { if (/** @type {Legacy.LegacyConstTag} */ (node).expression !== undefined) { return node; } const modern_node = /** @type {AST.ConstTag} */ (node); const { id: left } = { ...modern_node.declaration.declarations[0] }; // @ts-ignore delete left.typeAnnotation; return { type: 'ConstTag', start: modern_node.start, end: node.end, expression: { type: 'AssignmentExpression', start: (modern_node.declaration.start ?? 0) + 'const '.length, end: modern_node.declaration.end ?? 0, operator: '=', left, right: modern_node.declaration.declarations[0].init } }; }, // @ts-ignore KeyBlock(node, { visit }) { remove_surrounding_whitespace_nodes(node.fragment.nodes); return { type: 'KeyBlock', start: node.start, end: node.end, expression: node.expression, children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, // @ts-ignore EachBlock(node, { visit }) { let elseblock = undefined; if (node.fallback) { const first = node.fallback.nodes.at(0); const end = source.lastIndexOf('{', /** @type {number} */ (node.end) - 1); const start = first?.start ?? end; remove_surrounding_whitespace_nodes(node.fallback.nodes); elseblock = { type: 'ElseBlock', start, end, children: node.fallback.nodes.map((child) => visit(child)) }; } remove_surrounding_whitespace_nodes(node.body.nodes); return { type: 'EachBlock', start: node.start, end: node.end, children: node.body.nodes.map((child) => visit(child)), context: node.context, expression: node.expression, index: node.index, key: node.key, else: elseblock }; }, ExpressionTag(node, { path }) { const parent = path.at(-1); if (parent?.type === 'Attribute') { if (source[parent.start] === '{') { return { type: 'AttributeShorthand', start: node.start, end: node.end, expression: node.expression }; } } return { type: 'MustacheTag', start: node.start, end: node.end, expression: node.expression }; }, HtmlTag(node) { return { ...node, type: 'RawMustacheTag' }; }, // @ts-ignore IfBlock(node, { visit }) { let elseblock = undefined; if (node.alternate) { let nodes = node.alternate.nodes; if (nodes.length === 1 && nodes[0].type === 'IfBlock' && nodes[0].elseif) { nodes = nodes[0].consequent.nodes; } const end = source.lastIndexOf('{', /** @type {number} */ (node.end) - 1); const start = nodes.at(0)?.start ?? end; remove_surrounding_whitespace_nodes(node.alternate.nodes); elseblock = { type: 'ElseBlock', start, end: end, children: node.alternate.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; } const start = node.elseif ? node.consequent.nodes[0]?.start ?? source.lastIndexOf('{', /** @type {number} */ (node.end) - 1) : node.start; remove_surrounding_whitespace_nodes(node.consequent.nodes); return { type: 'IfBlock', start, end: node.end, expression: node.test, children: node.consequent.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ), else: elseblock, elseif: node.elseif ? true : undefined }; }, OnDirective(node) { return { ...node, type: 'EventHandler' }; }, // @ts-expect-error SnippetBlock(node, { visit }) { remove_surrounding_whitespace_nodes(node.body.nodes); return { type: 'SnippetBlock', start: node.start, end: node.end, expression: node.expression, parameters: node.parameters, children: node.body.nodes.map((child) => visit(child)) }; }, RegularElement(node, { visit }) { return { type: 'Element', start: node.start, end: node.end, name: node.name, attributes: node.attributes.map((child) => visit(child)), children: node.fragment.nodes.map((child) => visit(child)) }; }, SlotElement(node, { visit }) { return { type: 'Slot', start: node.start, end: node.end, name: node.name, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, Attribute(node, { visit, next, path }) { if (node.value !== true && !Array.isArray(node.value)) { path.push(node); const value = /** @type {Legacy.LegacyAttribute['value']} */ ([visit(node.value)]); path.pop(); return { ...node, value }; } else { return next(); } }, StyleDirective(node, { visit, next, path }) { if (node.value !== true && !Array.isArray(node.value)) { path.push(node); const value = /** @type {Legacy.LegacyStyleDirective['value']} */ ([visit(node.value)]); path.pop(); return { ...node, value }; } else { return next(); } }, SpreadAttribute(node) { return { ...node, type: 'Spread' }; }, StyleSheet(node, context) { return { ...node, ...context.next(), type: 'Style' }; }, SvelteBody(node, { visit }) { return { type: 'Body', name: 'svelte:body', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, SvelteComponent(node, { visit }) { return { type: 'InlineComponent', name: 'svelte:component', start: node.start, end: node.end, expression: node.expression, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, SvelteDocument(node, { visit }) { return { type: 'Document', name: 'svelte:document', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, SvelteElement(node, { visit }) { /** @type {Expression | string} */ let tag = node.tag; if ( tag.type === 'Literal' && typeof tag.value === 'string' && source[/** @type {number} */ (node.tag.start) - 1] !== '{' ) { tag = tag.value; } return { type: 'Element', name: 'svelte:element', start: node.start, end: node.end, tag, attributes: node.attributes.map((child) => visit(child)), children: node.fragment.nodes.map((child) => visit(child)) }; }, SvelteFragment(node, { visit }) { return { type: 'SlotTemplate', name: 'svelte:fragment', start: node.start, end: node.end, attributes: node.attributes.map( (a) => /** @type {Legacy.LegacyAttributeLike} */ (visit(a)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, SvelteHead(node, { visit }) { return { type: 'Head', name: 'svelte:head', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, SvelteOptions(node, { visit }) { return { type: 'Options', name: 'svelte:options', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ) }; }, SvelteSelf(node, { visit }) { return { type: 'InlineComponent', name: 'svelte:self', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, SvelteWindow(node, { visit }) { return { type: 'Window', name: 'svelte:window', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, Text(node, { path }) { const parent = path.at(-1); if (parent?.type === 'RegularElement' && parent.name === 'style') { // these text nodes are missing `raw` for some dumb reason return /** @type {AST.Text} */ ({ type: 'Text', start: node.start, end: node.end, data: node.data }); } }, TitleElement(node, { visit }) { return { type: 'Title', name: 'title', start: node.start, end: node.end, attributes: node.attributes.map( (child) => /** @type {Legacy.LegacyAttributeLike} */ (visit(child)) ), children: node.fragment.nodes.map( (child) => /** @type {Legacy.LegacyElementLike} */ (visit(child)) ) }; }, TransitionDirective(node) { return { ...node, type: 'Transition' }; }, UseDirective(node) { return { ...node, type: 'Action' }; }, LetDirective(node) { return { ...node, type: 'Let' }; } }) ); } |