Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 10348x 10348x 1229x 10348x 10348x 2x 2x 2x 2x 2x 2x 2x 17013x 8235x 8235x 8235x 8235x 8235x 8235x 8235x 8778x 8778x 8778x 2x 2x 2x 2x 2x 2x 168x 168x 2x 2x 2x 2x 2x 2x 213x 213x 213x 213x 213x 213x 213x 213x 213x 213x 213x 234x 234x 234x 234x 213x 213x 325x 325x 325x 232x 8x 8x 8x 8x 232x 232x 232x 232x 232x 232x 232x 232x 232x 232x 232x 232x 1x 232x 1x 232x 231x 231x 28x 231x 6x 231x 225x 225x 225x 218x 218x 218x 218x 218x 1x 1x 218x 232x 325x 213x 213x 2x 2x 2x 2x 2x 2x 2x 213x 213x 213x 213x 213x 213x 213x 202x 188x 188x 188x 213x 11x 11x 11x 11x 213x 213x 213x 213x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2028x 2028x 2028x 2028x 2028x 2028x 1987x 1987x 2028x 2028x 73x 73x 2028x 2028x 65x 65x 2028x 2028x 2028x 97x 97x 97x 2028x 1963x 1963x 2028x 2028x 2028x 2028x 2028x 1008x 1008x 779x 1008x 229x 229x 229x 19x 229x 10x 229x 219x 219x 229x 229x 229x 1008x 2028x 2028x 2028x 2028x 2028x 2028x 2028x 2028x 2x 2x 2x 2x 2x 2x 2x 2x 2323x 2323x 2323x 2323x 2323x 2323x 251x 251x 2323x 2323x 2323x 2x 2x 2x 2x 2x 2x 841x 841x 841x 841x 841x 841x 841x 841x 387x 841x 505x 505x 336x 841x 80x 80x 80x 80x 80x 80x 80x 80x 80x 20x 80x 19x 19x 80x 317x 317x 317x 2x 2x 2x 2x 2x 2x 2x 114x 79x 79x 79x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 98x 89x 89x 89x 89x 89x 89x 35x 35x 35x 2x 2x 2x 2x 2x 2x 2x 402x 402x | /** @import { ArrowFunctionExpression, Expression, FunctionDeclaration, FunctionExpression, Identifier, Pattern, PrivateIdentifier, Statement } from 'estree' */
/** @import { Binding, SvelteNode } from '#compiler' */
/** @import { ClientTransformState, ComponentClientTransformState, ComponentContext } from './types.js' */
/** @import { Analysis } from '../../types.js' */
/** @import { Scope } from '../../scope.js' */
import * as b from '../../../utils/builders.js';
import { extract_identifiers, is_simple_expression } from '../../../utils/ast.js';
import {
PROPS_IS_LAZY_INITIAL,
PROPS_IS_IMMUTABLE,
PROPS_IS_RUNES,
PROPS_IS_UPDATED,
PROPS_IS_BINDABLE
} from '../../../../constants.js';
import { dev } from '../../../state.js';
import { get_value } from './visitors/shared/declarations.js';
/**
* @param {Binding} binding
* @param {Analysis} analysis
* @returns {boolean}
*/
export function is_state_source(binding, analysis) {
return (
(binding.kind === 'state' || binding.kind === 'raw_state') &&
(!analysis.immutable || binding.reassigned || analysis.accessors)
);
}
/**
* @param {Identifier} node
* @param {ClientTransformState} state
* @returns {Expression}
*/
export function build_getter(node, state) {
if (Object.hasOwn(state.transform, node.name)) {
const binding = state.scope.get(node.name);
// don't transform the declaration itself
if (node !== binding?.node) {
return state.transform[node.name].read(node);
}
}
return node;
}
/**
* @param {Expression} value
* @param {Expression} previous
*/
export function build_proxy_reassignment(value, previous) {
return dev ? b.call('$.proxy', value, b.null, previous) : b.call('$.proxy', value);
}
/**
* @param {FunctionDeclaration | FunctionExpression | ArrowFunctionExpression} node
* @param {ComponentContext} context
* @returns {Pattern[]}
*/
function get_hoisted_params(node, context) {
const scope = context.state.scope;
/** @type {Identifier[]} */
const params = [];
/**
* We only want to push if it's not already present to avoid name clashing
* @param {Identifier} id
*/
function push_unique(id) {
if (!params.find((param) => param.name === id.name)) {
params.push(id);
}
}
for (const [reference] of scope.references) {
let binding = scope.get(reference);
if (binding !== null && !scope.declarations.has(reference) && binding.initial !== node) {
if (binding.kind === 'store_sub') {
// We need both the subscription for getting the value and the store for updating
push_unique(b.id(binding.node.name));
binding = /** @type {Binding} */ (scope.get(binding.node.name.slice(1)));
}
let expression = context.state.transform[reference]?.read(b.id(binding.node.name));
if (
// If it's a destructured derived binding, then we can extract the derived signal reference and use that.
// TODO this code is bad, we need to kill it
expression != null &&
typeof expression !== 'function' &&
expression.type === 'MemberExpression' &&
expression.object.type === 'CallExpression' &&
expression.object.callee.type === 'Identifier' &&
expression.object.callee.name === '$.get' &&
expression.object.arguments[0].type === 'Identifier'
) {
push_unique(b.id(expression.object.arguments[0].name));
} else if (
// If we are referencing a simple $$props value, then we need to reference the object property instead
(binding.kind === 'prop' || binding.kind === 'bindable_prop') &&
!is_prop_source(binding, context.state)
) {
push_unique(b.id('$$props'));
} else if (
// imports don't need to be hoisted
binding.declaration_kind !== 'import'
) {
// create a copy to remove start/end tags which would mess up source maps
push_unique(b.id(binding.node.name));
// rest props are often accessed through the $$props object for optimization reasons,
// but we can't know if the delegated event handler will use it, so we need to add both as params
if (binding.kind === 'rest_prop' && context.state.analysis.runes) {
push_unique(b.id('$$props'));
}
}
}
}
return params;
}
/**
* @param {FunctionDeclaration | FunctionExpression | ArrowFunctionExpression} node
* @param {ComponentContext} context
* @returns {Pattern[]}
*/
export function build_hoisted_params(node, context) {
const hoisted_params = get_hoisted_params(node, context);
node.metadata.hoisted_params = hoisted_params;
/** @type {Pattern[]} */
const params = [];
if (node.params.length === 0) {
if (hoisted_params.length > 0) {
// For the event object
params.push(b.id('_'));
}
} else {
for (const param of node.params) {
params.push(/** @type {Pattern} */ (context.visit(param)));
}
}
params.push(...hoisted_params);
return params;
}
/**
* @param {Binding} binding
* @param {ComponentClientTransformState} state
* @param {string} name
* @param {Expression | null} [initial]
* @returns
*/
export function get_prop_source(binding, state, name, initial) {
/** @type {Expression[]} */
const args = [b.id('$$props'), b.literal(name)];
let flags = 0;
if (binding.kind === 'bindable_prop') {
flags |= PROPS_IS_BINDABLE;
}
if (state.analysis.immutable) {
flags |= PROPS_IS_IMMUTABLE;
}
if (state.analysis.runes) {
flags |= PROPS_IS_RUNES;
}
if (
state.analysis.accessors ||
(state.analysis.immutable
? binding.reassigned || (state.analysis.runes && binding.mutated)
: binding.updated)
) {
flags |= PROPS_IS_UPDATED;
}
/** @type {Expression | undefined} */
let arg;
if (initial) {
// To avoid eagerly evaluating the right-hand-side, we wrap it in a thunk if necessary
if (is_simple_expression(initial)) {
arg = initial;
} else {
if (
initial.type === 'CallExpression' &&
initial.callee.type === 'Identifier' &&
initial.arguments.length === 0
) {
arg = initial.callee;
} else {
arg = b.thunk(initial);
}
flags |= PROPS_IS_LAZY_INITIAL;
}
}
if (flags || arg) {
args.push(b.literal(flags));
if (arg) args.push(arg);
}
return b.call('$.prop', ...args);
}
/**
*
* @param {Binding} binding
* @param {ClientTransformState} state
* @returns
*/
export function is_prop_source(binding, state) {
return (
(binding.kind === 'prop' || binding.kind === 'bindable_prop') &&
(!state.analysis.runes ||
state.analysis.accessors ||
binding.reassigned ||
binding.initial ||
// Until legacy mode is gone, we also need to use the prop source when only mutated is true,
// because the parent could be a legacy component which needs coarse-grained reactivity
binding.updated)
);
}
/**
* @param {Expression} node
* @param {Scope | null} scope
*/
export function should_proxy(node, scope) {
if (
!node ||
node.type === 'Literal' ||
node.type === 'TemplateLiteral' ||
node.type === 'ArrowFunctionExpression' ||
node.type === 'FunctionExpression' ||
node.type === 'UnaryExpression' ||
node.type === 'BinaryExpression' ||
(node.type === 'Identifier' && node.name === 'undefined')
) {
return false;
}
if (node.type === 'Identifier' && scope !== null) {
const binding = scope.get(node.name);
// Let's see if the reference is something that can be proxied
if (
binding !== null &&
!binding.reassigned &&
binding.initial !== null &&
binding.initial.type !== 'FunctionDeclaration' &&
binding.initial.type !== 'ClassDeclaration' &&
binding.initial.type !== 'ImportDeclaration' &&
binding.initial.type !== 'EachBlock'
) {
return should_proxy(binding.initial, null);
}
}
return true;
}
/**
* @param {Pattern} node
* @param {import('zimmerframe').Context<SvelteNode, ComponentClientTransformState>} context
* @returns {{ id: Pattern, declarations: null | Statement[] }}
*/
export function create_derived_block_argument(node, context) {
if (node.type === 'Identifier') {
context.state.transform[node.name] = { read: get_value };
return { id: node, declarations: null };
}
const pattern = /** @type {Pattern} */ (context.visit(node));
const identifiers = extract_identifiers(node);
const id = b.id('$$source');
const value = b.id('$$value');
const block = b.block([
b.var(pattern, b.call('$.get', id)),
b.return(b.object(identifiers.map((identifier) => b.prop('init', identifier, identifier))))
]);
const declarations = [b.var(value, create_derived(context.state, b.thunk(block)))];
for (const id of identifiers) {
context.state.transform[id.name] = { read: get_value };
declarations.push(
b.var(id, create_derived(context.state, b.thunk(b.member(b.call('$.get', value), id))))
);
}
return { id, declarations };
}
/**
* Svelte legacy mode should use safe equals in most places, runes mode shouldn't
* @param {ComponentClientTransformState} state
* @param {Expression} arg
*/
export function create_derived(state, arg) {
return b.call(state.analysis.runes ? '$.derived' : '$.derived_safe_equal', arg);
}
|