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609 lines
20 KiB
609 lines
20 KiB
import { b, x, p } from 'code-red';
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import Renderer from './Renderer.js';
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import { walk } from 'estree-walker';
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import { extract_names } from 'periscopic';
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import { invalidate } from './invalidate.js';
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import { apply_preprocessor_sourcemap } from '../../utils/mapped_code.js';
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import { flatten } from '../../utils/flatten.js';
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import check_enable_sourcemap from '../utils/check_enable_sourcemap.js';
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import { push_array } from '../../utils/push_array.js';
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/**
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* @param {import('../Component.js').default} component
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* @param {import('../../interfaces.js').CompileOptions} options
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* @returns {{ js: import('estree').Node[]; css: import('../../interfaces.js').CssResult; }}
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*/
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export default function dom(component, options) {
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const { name } = component;
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const renderer = new Renderer(component, options);
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const { block } = renderer;
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block.has_outro_method = true;
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/** @type {import('estree').Node[][]} */
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const body = [];
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if (renderer.file_var) {
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const file = component.file ? x`"${component.file}"` : x`undefined`;
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body.push(b`const ${renderer.file_var} = ${file};`);
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}
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const css = component.stylesheet.render(options.filename);
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const css_sourcemap_enabled = check_enable_sourcemap(options.enableSourcemap, 'css');
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if (css_sourcemap_enabled) {
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css.map = apply_preprocessor_sourcemap(
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options.filename,
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css.map,
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/** @type {string | import('@ampproject/remapping').RawSourceMap | import('@ampproject/remapping').DecodedSourceMap} */ (
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options.sourcemap
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)
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);
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} else {
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css.map = null;
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}
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const styles =
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css_sourcemap_enabled && component.stylesheet.has_styles && options.dev
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? `${css.code}\n/*# sourceMappingURL=${css.map.toUrl()} */`
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: css.code;
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const add_css = component.get_unique_name('add_css');
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const should_add_css = !!styles && (options.customElement || options.css === 'injected');
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if (should_add_css) {
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body.push(b`
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function ${add_css}(target) {
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@append_styles(target, "${component.stylesheet.id}", "${styles}");
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}
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`);
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}
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// fix order
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// TODO the deconflicted names of blocks are reversed... should set them here
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const blocks = renderer.blocks.slice().reverse();
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push_array(
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body,
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blocks.map((block) => {
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// TODO this is a horrible mess — renderer.blocks
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// contains a mixture of Blocks and Nodes
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if (/** @type {import('./Block.js').default} */ (block).render)
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return /** @type {import('./Block.js').default} */ (block).render();
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return block;
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})
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);
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if (options.dev && !options.hydratable) {
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block.chunks.claim.push(
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b`throw new @_Error("options.hydrate only works if the component was compiled with the \`hydratable: true\` option");`
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);
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}
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const uses_slots = component.var_lookup.has('$$slots');
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/** @type {import('estree').Node[] | undefined} */
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let compute_slots;
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if (uses_slots) {
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compute_slots = b`
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const $$slots = @compute_slots(#slots);
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`;
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}
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const uses_props = component.var_lookup.has('$$props');
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const uses_rest = component.var_lookup.has('$$restProps');
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const $$props = uses_props || uses_rest ? '$$new_props' : '$$props';
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const props = component.vars.filter((variable) => !variable.module && variable.export_name);
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const writable_props = props.filter((variable) => variable.writable);
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const omit_props_names = component.get_unique_name('omit_props_names');
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const compute_rest = x`@compute_rest_props($$props, ${omit_props_names.name})`;
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const rest = uses_rest
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? b`
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const ${omit_props_names.name} = [${props.map((prop) => `"${prop.export_name}"`).join(',')}];
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let $$restProps = ${compute_rest};
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`
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: null;
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const set =
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uses_props || uses_rest || writable_props.length > 0 || component.slots.size > 0
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? x`
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${$$props} => {
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${
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uses_props &&
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renderer.invalidate(
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'$$props',
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x`$$props = @assign(@assign({}, $$props), @exclude_internal_props($$new_props))`
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)
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}
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${
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uses_rest &&
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!uses_props &&
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x`$$props = @assign(@assign({}, $$props), @exclude_internal_props($$new_props))`
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}
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${uses_rest && renderer.invalidate('$$restProps', x`$$restProps = ${compute_rest}`)}
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${writable_props.map(
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(prop) =>
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b`if ('${prop.export_name}' in ${$$props}) ${renderer.invalidate(
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prop.name,
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x`${prop.name} = ${$$props}.${prop.export_name}`
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)};`
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)}
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${
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component.slots.size > 0 &&
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b`if ('$$scope' in ${$$props}) ${renderer.invalidate(
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'$$scope',
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x`$$scope = ${$$props}.$$scope`
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)};`
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}
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}
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`
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: null;
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const accessors = [];
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const not_equal = component.component_options.immutable ? x`@not_equal` : x`@safe_not_equal`;
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/** @type {import('estree').Node[] | import('estree').Node} */
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let missing_props_check;
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/** @type {import('estree').Expression} */
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let inject_state;
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/** @type {import('estree').Expression} */
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let capture_state;
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/** @type {import('estree').Node[] | import('estree').Node} */
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let props_inject;
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props.forEach((prop) => {
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const variable = component.var_lookup.get(prop.name);
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if (!variable.writable || component.component_options.accessors) {
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accessors.push({
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type: 'MethodDefinition',
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kind: 'get',
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key: { type: 'Identifier', name: prop.export_name },
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value: x`function() {
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return ${
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prop.hoistable
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? prop.name
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: x`this.$$.ctx[${renderer.context_lookup.get(prop.name).index}]`
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}
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}`
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});
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} else if (component.compile_options.dev) {
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accessors.push({
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type: 'MethodDefinition',
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kind: 'get',
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key: { type: 'Identifier', name: prop.export_name },
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value: x`function() {
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throw new @_Error("<${component.tag}>: Props cannot be read directly from the component instance unless compiling with 'accessors: true' or '<svelte:options accessors/>'");
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}`
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});
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}
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if (component.component_options.accessors) {
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if (variable.writable && !renderer.readonly.has(prop.name)) {
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accessors.push({
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type: 'MethodDefinition',
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kind: 'set',
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key: { type: 'Identifier', name: prop.export_name },
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value: x`function(${prop.name}) {
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this.$$set({ ${prop.export_name}: ${prop.name} });
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@flush();
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}`
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});
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} else if (component.compile_options.dev) {
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accessors.push({
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type: 'MethodDefinition',
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kind: 'set',
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key: { type: 'Identifier', name: prop.export_name },
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value: x`function(value) {
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throw new @_Error("<${component.tag}>: Cannot set read-only property '${prop.export_name}'");
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}`
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});
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}
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} else if (component.compile_options.dev) {
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accessors.push({
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type: 'MethodDefinition',
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kind: 'set',
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key: { type: 'Identifier', name: prop.export_name },
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value: x`function(value) {
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throw new @_Error("<${component.tag}>: Props cannot be set directly on the component instance unless compiling with 'accessors: true' or '<svelte:options accessors/>'");
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}`
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});
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}
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});
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component.instance_exports_from.forEach((exports_from) => {
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const import_declaration = {
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...exports_from,
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type: 'ImportDeclaration',
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specifiers: [],
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source: exports_from.source
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};
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component.imports.push(/** @type {import('estree').ImportDeclaration} */ (import_declaration));
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exports_from.specifiers.forEach((specifier) => {
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if (component.component_options.accessors) {
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const name = component.get_unique_name(specifier.exported.name);
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import_declaration.specifiers.push({
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...specifier,
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type: 'ImportSpecifier',
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imported: specifier.local,
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local: name
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});
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accessors.push({
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type: 'MethodDefinition',
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kind: 'get',
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key: { type: 'Identifier', name: specifier.exported.name },
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value: x`function() {
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return ${name}
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}`
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});
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} else if (component.compile_options.dev) {
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accessors.push({
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type: 'MethodDefinition',
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kind: 'get',
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key: { type: 'Identifier', name: specifier.exported.name },
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value: x`function() {
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throw new @_Error("<${component.tag}>: Props cannot be read directly from the component instance unless compiling with 'accessors: true' or '<svelte:options accessors/>'");
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}`
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});
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}
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});
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});
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if (component.compile_options.dev) {
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// checking that expected ones were passed
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const expected = props.filter((prop) => prop.writable && !prop.initialised);
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if (expected.length) {
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missing_props_check = b`
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$$self.$$.on_mount.push(function () {
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${expected.map(
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(prop) => b`
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if (${prop.name} === undefined && !(('${prop.export_name}' in $$props) || $$self.$$.bound[$$self.$$.props['${prop.export_name}']])) {
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@_console.warn("<${component.tag}> was created without expected prop '${prop.export_name}'");
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}`
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)}
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});
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`;
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}
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const capturable_vars = component.vars.filter(
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(v) => !v.internal && !v.global && !v.name.startsWith('$$')
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);
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if (capturable_vars.length > 0) {
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capture_state = x`() => ({ ${capturable_vars.map((prop) => p`${prop.name}`)} })`;
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}
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const injectable_vars = capturable_vars.filter(
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(v) => !v.module && v.writable && v.name[0] !== '$'
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);
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if (uses_props || injectable_vars.length > 0) {
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inject_state = x`
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${$$props} => {
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${
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uses_props &&
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renderer.invalidate('$$props', x`$$props = @assign(@assign({}, $$props), $$new_props)`)
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}
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${injectable_vars.map(
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(v) =>
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b`if ('${v.name}' in $$props) ${renderer.invalidate(
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v.name,
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x`${v.name} = ${$$props}.${v.name}`
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)};`
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)}
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}
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`;
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props_inject = b`
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if ($$props && "$$inject" in $$props) {
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$$self.$inject_state($$props.$$inject);
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}
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`;
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}
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}
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// instrument assignments
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if (component.ast.instance) {
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let scope = component.instance_scope;
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const map = component.instance_scope_map;
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/** @type {import('estree').Node | null} */
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let execution_context = null;
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walk(component.ast.instance.content, {
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enter(node) {
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if (map.has(node)) {
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scope = /** @type {import('periscopic').Scope} */ (map.get(node));
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if (!execution_context && !scope.block) {
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execution_context = node;
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}
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} else if (
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!execution_context &&
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node.type === 'LabeledStatement' &&
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node.label.name === '$'
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) {
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execution_context = node;
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}
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},
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leave(node) {
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if (map.has(node)) {
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scope = scope.parent;
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}
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if (execution_context === node) {
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execution_context = null;
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}
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if (node.type === 'AssignmentExpression' || node.type === 'UpdateExpression') {
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const assignee = node.type === 'AssignmentExpression' ? node.left : node.argument;
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// normally (`a = 1`, `b.c = 2`), there'll be a single name
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// (a or b). In destructuring cases (`[d, e] = [e, d]`) there
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// may be more, in which case we need to tack the extra ones
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// onto the initial function call
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const names = new Set(extract_names(/** @type {import('estree').Node} */ (assignee)));
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this.replace(invalidate(renderer, scope, node, names, execution_context === null));
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}
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}
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});
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component.rewrite_props(({ name, reassigned, export_name }) => {
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const value = `$${name}`;
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const i = renderer.context_lookup.get(`$${name}`).index;
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const insert =
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reassigned || export_name
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? b`${`$$subscribe_${name}`}()`
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: b`@component_subscribe($$self, ${name}, #value => $$invalidate(${i}, ${value} = #value))`;
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if (component.compile_options.dev) {
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return b`@validate_store(${name}, '${name}'); ${insert}`;
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}
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return insert;
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});
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}
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const args = [x`$$self`];
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const has_invalidate =
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props.length > 0 ||
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component.has_reactive_assignments ||
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component.slots.size > 0 ||
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capture_state ||
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inject_state;
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if (has_invalidate) {
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args.push(x`$$props`, x`$$invalidate`);
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} else if (component.compile_options.dev) {
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// $$props arg is still needed for unknown prop check
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args.push(x`$$props`);
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}
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// has_create_fragment is intentionally to be true in dev mode.
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const has_create_fragment = component.compile_options.dev || block.has_content();
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if (has_create_fragment) {
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body.push(b`
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function create_fragment(#ctx) {
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${block.get_contents()}
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}
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`);
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}
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body.push(b`
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${component.extract_javascript(component.ast.module)}
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${component.fully_hoisted}
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`);
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const filtered_props = props.filter((prop) => {
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const variable = component.var_lookup.get(prop.name);
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if (variable.hoistable) return false;
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return prop.name[0] !== '$';
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});
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const reactive_stores = component.vars.filter(
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(variable) => variable.name[0] === '$' && variable.name[1] !== '$'
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);
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const instance_javascript = component.extract_javascript(component.ast.instance);
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const has_definition =
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component.compile_options.dev ||
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(instance_javascript && instance_javascript.length > 0) ||
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filtered_props.length > 0 ||
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uses_props ||
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component.partly_hoisted.length > 0 ||
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renderer.initial_context.length > 0 ||
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component.reactive_declarations.length > 0 ||
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capture_state ||
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inject_state;
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const definition = has_definition
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? component.alias('instance')
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: { type: 'Literal', value: null };
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const reactive_store_subscriptions = reactive_stores
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.filter((store) => {
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const variable = component.var_lookup.get(store.name.slice(1));
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return !variable || variable.hoistable;
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})
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.map(
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({ name }) => b`
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${component.compile_options.dev && b`@validate_store(${name.slice(1)}, '${name.slice(1)}');`}
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@component_subscribe($$self, ${name.slice(1)}, $$value => $$invalidate(${
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renderer.context_lookup.get(name).index
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}, ${name} = $$value));
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`
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);
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const resubscribable_reactive_store_unsubscribers = reactive_stores
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.filter((store) => {
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const variable = component.var_lookup.get(store.name.slice(1));
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return variable && (variable.reassigned || variable.export_name);
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})
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.map(({ name }) => b`$$self.$$.on_destroy.push(() => ${`$$unsubscribe_${name.slice(1)}`}());`);
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if (has_definition) {
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/** @type {import('estree').Node | import('estree').Node[]} */
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const reactive_declarations = [];
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/** @type {import('estree').Node[]} */
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const fixed_reactive_declarations = []; // not really 'reactive' but whatever
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component.reactive_declarations.forEach((d) => {
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const dependencies = Array.from(d.dependencies);
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const uses_rest_or_props = !!dependencies.find((n) => n === '$$props' || n === '$$restProps');
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const writable = dependencies.filter((n) => {
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const variable = component.var_lookup.get(n);
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return variable && (variable.export_name || variable.mutated || variable.reassigned);
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});
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const condition =
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!uses_rest_or_props && writable.length > 0 && renderer.dirty(writable, true);
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let statement = d.node; // TODO remove label (use d.node.body) if it's not referenced
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if (condition)
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statement = /** @type {import('estree').Statement} */ (
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b`if (${condition}) { ${statement} }`[0]
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);
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if (condition || uses_rest_or_props) {
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reactive_declarations.push(statement);
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} else {
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fixed_reactive_declarations.push(statement);
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}
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});
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const injected = Array.from(component.injected_reactive_declaration_vars).filter((name) => {
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const variable = component.var_lookup.get(name);
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return variable.injected && variable.name[0] !== '$';
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});
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const reactive_store_declarations = reactive_stores.map((variable) => {
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const $name = variable.name;
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const name = $name.slice(1);
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const store = component.var_lookup.get(name);
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if (store && (store.reassigned || store.export_name)) {
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const unsubscribe = `$$unsubscribe_${name}`;
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const subscribe = `$$subscribe_${name}`;
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const i = renderer.context_lookup.get($name).index;
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return b`let ${$name}, ${unsubscribe} = @noop, ${subscribe} = () => (${unsubscribe}(), ${unsubscribe} = @subscribe(${name}, $$value => $$invalidate(${i}, ${$name} = $$value)), ${name})`;
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}
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return b`let ${$name};`;
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});
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/** @type {import('estree').Node[] | undefined} */
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let unknown_props_check;
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if (component.compile_options.dev && !(uses_props || uses_rest)) {
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unknown_props_check = b`
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const writable_props = [${writable_props.map((prop) => x`'${prop.export_name}'`)}];
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@_Object.keys($$props).forEach(key => {
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if (!~writable_props.indexOf(key) && key.slice(0, 2) !== '$$' && key !== 'slot') @_console.warn(\`<${
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component.tag
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}> was created with unknown prop '\${key}'\`);
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});
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`;
|
|
}
|
|
const return_value = {
|
|
type: 'ArrayExpression',
|
|
elements: renderer.initial_context.map(
|
|
(member) =>
|
|
/** @type {import('estree').Expression} */ ({
|
|
type: 'Identifier',
|
|
name: member.name
|
|
})
|
|
)
|
|
};
|
|
body.push(b`
|
|
function ${definition}(${args}) {
|
|
${injected.map((name) => b`let ${name};`)}
|
|
|
|
${rest}
|
|
|
|
${reactive_store_declarations}
|
|
|
|
${reactive_store_subscriptions}
|
|
|
|
${resubscribable_reactive_store_unsubscribers}
|
|
|
|
${
|
|
component.slots.size || component.compile_options.dev || uses_slots
|
|
? b`let { $$slots: #slots = {}, $$scope } = $$props;`
|
|
: null
|
|
}
|
|
${
|
|
component.compile_options.dev &&
|
|
b`@validate_slots('${component.tag}', #slots, [${[...component.slots.keys()]
|
|
.map((key) => `'${key}'`)
|
|
.join(',')}]);`
|
|
}
|
|
${compute_slots}
|
|
|
|
${instance_javascript}
|
|
|
|
${missing_props_check}
|
|
${unknown_props_check}
|
|
|
|
${
|
|
renderer.binding_groups.size > 0 &&
|
|
b`const $$binding_groups = [${[...renderer.binding_groups.keys()].map((_) => x`[]`)}];`
|
|
}
|
|
|
|
${component.partly_hoisted}
|
|
|
|
${set && b`$$self.$$set = ${set};`}
|
|
|
|
${capture_state && b`$$self.$capture_state = ${capture_state};`}
|
|
|
|
${inject_state && b`$$self.$inject_state = ${inject_state};`}
|
|
|
|
${/* before reactive declarations */ props_inject}
|
|
|
|
${
|
|
reactive_declarations.length > 0 &&
|
|
b`
|
|
$$self.$$.update = () => {
|
|
${reactive_declarations}
|
|
};
|
|
`
|
|
}
|
|
|
|
${fixed_reactive_declarations}
|
|
|
|
${uses_props && b`$$props = @exclude_internal_props($$props);`}
|
|
|
|
return ${return_value};
|
|
}
|
|
`);
|
|
}
|
|
const prop_indexes = /** @type {import('estree').ObjectExpression} */ (
|
|
x`{
|
|
${props
|
|
.filter((v) => v.export_name && !v.module)
|
|
.map((v) => p`${v.export_name}: ${renderer.context_lookup.get(v.name).index}`)}
|
|
}`
|
|
);
|
|
let dirty;
|
|
if (renderer.context_overflow) {
|
|
dirty = x`[]`;
|
|
for (let i = 0; i < renderer.context.length; i += 31) {
|
|
/** @type {any} */ (dirty).elements.push(x`-1`);
|
|
}
|
|
}
|
|
const superclass = {
|
|
type: 'Identifier',
|
|
name: options.dev ? '@SvelteComponentDev' : '@SvelteComponent'
|
|
};
|
|
const optional_parameters = [];
|
|
if (should_add_css) {
|
|
optional_parameters.push(add_css);
|
|
} else if (dirty) {
|
|
optional_parameters.push(x`null`);
|
|
}
|
|
if (dirty) {
|
|
optional_parameters.push(dirty);
|
|
}
|
|
const declaration = /** @type {import('estree').ClassDeclaration} */ (
|
|
b`
|
|
class ${name} extends ${superclass} {
|
|
constructor(options) {
|
|
super(${options.dev && 'options'});
|
|
@init(this, options, ${definition}, ${
|
|
has_create_fragment ? 'create_fragment' : 'null'
|
|
}, ${not_equal}, ${prop_indexes}, ${optional_parameters});
|
|
${
|
|
options.dev &&
|
|
b`@dispatch_dev("SvelteRegisterComponent", { component: this, tagName: "${name.name}", options, id: create_fragment.name });`
|
|
}
|
|
}
|
|
}
|
|
`[0]
|
|
);
|
|
push_array(declaration.body.body, accessors);
|
|
body.push(/** @type {any} */ (declaration));
|
|
if (options.customElement) {
|
|
const props_str = writable_props.reduce((def, prop) => {
|
|
def[prop.export_name] =
|
|
component.component_options.customElement?.props?.[prop.export_name] || {};
|
|
if (prop.is_boolean && !def[prop.export_name].type) {
|
|
def[prop.export_name].type = 'Boolean';
|
|
}
|
|
return def;
|
|
}, {});
|
|
const slots_str = [...component.slots.keys()].map((key) => `"${key}"`).join(',');
|
|
const accessors_str = accessors
|
|
.filter((accessor) => !writable_props.some((prop) => prop.export_name === accessor.key.name))
|
|
.map((accessor) => `"${accessor.key.name}"`)
|
|
.join(',');
|
|
const use_shadow_dom =
|
|
component.component_options.customElement?.shadow !== 'none' ? 'true' : 'false';
|
|
if (component.component_options.customElement?.tag) {
|
|
body.push(
|
|
b`@_customElements.define("${
|
|
component.component_options.customElement.tag
|
|
}", @create_custom_element(${name}, ${JSON.stringify(
|
|
props_str
|
|
)}, [${slots_str}], [${accessors_str}], ${use_shadow_dom}));`
|
|
);
|
|
} else {
|
|
body.push(
|
|
b`@create_custom_element(${name}, ${JSON.stringify(
|
|
props_str
|
|
)}, [${slots_str}], [${accessors_str}], ${use_shadow_dom});`
|
|
);
|
|
}
|
|
}
|
|
return { js: flatten(body), css };
|
|
}
|