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'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
var core = require('@babel/core');
var helperPluginUtils = require('@babel/helper-plugin-utils');
var helperEnvironmentVisitor = require('@babel/helper-environment-visitor');
function isNameOrLength(key) {
if (core.types.isIdentifier(key)) {
return key.name === "name" || key.name === "length";
}
if (core.types.isStringLiteral(key)) {
return key.value === "name" || key.value === "length";
}
return false;
}
function isStaticFieldWithValue(node) {
return (core.types.isClassProperty(node) || core.types.isClassPrivateProperty(node)) && node.static && !!node.value;
}
const hasReferenceVisitor = {
ReferencedIdentifier(path, state) {
if (path.node.name === state.name) {
state.ref();
path.stop();
}
},
Scope(path, {
name
}) {
if (path.scope.hasOwnBinding(name)) {
path.skip();
}
}
};
function isReferenceOrThis(node, name) {
return core.types.isThisExpression(node) || name && core.types.isIdentifier(node, {
name
});
}
const hasReferenceOrThisVisitor = {
"ThisExpression|ReferencedIdentifier"(path, state) {
if (isReferenceOrThis(path.node, state.name)) {
state.ref();
path.stop();
}
},
FunctionParent(path, state) {
if (path.isArrowFunctionExpression()) return;
if (state.name && !path.scope.hasOwnBinding(state.name)) {
path.traverse(hasReferenceVisitor, state);
}
path.skip();
if (path.isMethod()) {
helperEnvironmentVisitor.requeueComputedKeyAndDecorators(path);
}
}
};
function getPotentiallyBuggyFieldsIndexes(path) {
var _path$node$id;
const buggyPublicStaticFieldsIndexes = [];
let classReferenced = false;
const className = (_path$node$id = path.node.id) == null ? void 0 : _path$node$id.name;
const hasReferenceState = {
name: className,
ref: () => classReferenced = true
};
if (className) {
for (const el of path.get("body.body")) {
if (el.node.computed) {
el.get("key").traverse(hasReferenceVisitor, hasReferenceState);
if (classReferenced) break;
}
}
}
let nextPotentiallyBuggy = false;
const {
body
} = path.node.body;
for (let i = 0; i < body.length; i++) {
const node = body[i];
if (!nextPotentiallyBuggy) {
if (core.types.isStaticBlock(node)) {
classReferenced = true;
nextPotentiallyBuggy = true;
} else if (isStaticFieldWithValue(node)) {
if (!classReferenced) {
if (isReferenceOrThis(node.value, className)) {
classReferenced = true;
} else {
path.get(`body.body.${i}.value`).traverse(hasReferenceOrThisVisitor, hasReferenceState);
}
}
if (classReferenced) {
nextPotentiallyBuggy = !path.scope.isPure(node.value);
}
}
}
if (core.types.isClassProperty(node, {
static: true
}) && (nextPotentiallyBuggy || node.computed || isNameOrLength(node.key))) {
buggyPublicStaticFieldsIndexes.push(i);
}
}
return buggyPublicStaticFieldsIndexes;
}
function getNameOrLengthStaticFieldsIndexes(path) {
const indexes = [];
const {
body
} = path.node.body;
for (let i = 0; i < body.length; i++) {
const node = body[i];
if (core.types.isClassProperty(node, {
static: true,
computed: false
}) && isNameOrLength(node.key)) {
indexes.push(i);
}
}
return indexes;
}
function toRanges(nums) {
const ranges = [];
if (nums.length === 0) return ranges;
let start = nums[0];
let end = start + 1;
for (let i = 1; i < nums.length; i++) {
if (nums[i] <= nums[i - 1]) {
throw new Error("Internal Babel error: nums must be in ascending order");
}
if (nums[i] === end) {
end++;
} else {
ranges.push([start, end]);
start = nums[i];
end = start + 1;
}
}
ranges.push([start, end]);
return ranges;
}
function buildFieldsReplacement(fields, scope, file) {
return core.types.staticBlock(fields.map(field => {
const key = field.computed || !core.types.isIdentifier(field.key) ? field.key : core.types.stringLiteral(field.key.name);
return core.types.expressionStatement(core.types.callExpression(file.addHelper("defineProperty"), [core.types.thisExpression(), key, field.value || scope.buildUndefinedNode()]));
}));
}
var index = helperPluginUtils.declare(api => {
api.assertVersion(7);
const setPublicClassFields = api.assumption("setPublicClassFields");
return {
name: "bugfix-v8-static-class-fields-redefine-readonly",
visitor: {
Class(path) {
const ranges = toRanges(setPublicClassFields ? getNameOrLengthStaticFieldsIndexes(path) : getPotentiallyBuggyFieldsIndexes(path));
for (let i = ranges.length - 1; i >= 0; i--) {
const [start, end] = ranges[i];
const startPath = path.get("body.body")[start];
startPath.replaceWith(buildFieldsReplacement(path.node.body.body.slice(start, end), path.scope, this.file));
for (let j = end - 1; j > start; j--) {
path.get("body.body")[j].remove();
}
}
}
}
};
});
exports.default = index;
//# sourceMappingURL=index.js.map
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