90 lines
3.3 KiB
JavaScript
90 lines
3.3 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const utils_1 = require("../utils");
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const css_utils_1 = require("../utils/css-utils");
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exports.default = (0, utils_1.createRule)('no-dupe-style-properties', {
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meta: {
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docs: {
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description: 'disallow duplicate style properties',
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category: 'Possible Errors',
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recommended: true
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},
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schema: [],
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messages: {
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unexpected: "Duplicate property '{{name}}'."
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},
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type: 'problem'
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},
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create(context) {
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return {
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SvelteStartTag(node) {
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const reported = new Set();
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const beforeDeclarations = new Map();
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for (const { decls } of iterateStyleDeclSetFromAttrs(node.attributes)) {
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for (const decl of decls) {
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const already = beforeDeclarations.get(decl.prop);
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if (already) {
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for (const report of [already, decl].filter((n) => !reported.has(n))) {
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context.report({
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node,
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loc: report.loc,
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messageId: 'unexpected',
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data: { name: report.prop }
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});
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reported.add(report);
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}
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}
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}
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for (const decl of decls) {
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beforeDeclarations.set(decl.prop, decl);
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}
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}
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}
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};
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function* iterateStyleDeclSetFromAttrs(attrs) {
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for (const attr of attrs) {
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if (attr.type === 'SvelteStyleDirective') {
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yield {
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decls: [{ prop: attr.key.name.name, loc: attr.key.name.loc }]
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};
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}
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else if (attr.type === 'SvelteAttribute') {
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if (attr.key.name !== 'style') {
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continue;
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}
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const root = (0, css_utils_1.parseStyleAttributeValue)(attr, context);
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if (!root) {
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continue;
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}
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yield* iterateStyleDeclSetFromStyleRoot(root);
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}
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}
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}
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function* iterateStyleDeclSetFromStyleRoot(root) {
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for (const child of root.nodes) {
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if (child.type === 'decl') {
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yield {
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decls: [
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{
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prop: child.prop.name,
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get loc() {
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return child.prop.loc;
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}
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}
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]
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};
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}
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else if (child.type === 'inline') {
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const decls = [];
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for (const root of child.getAllInlineStyles().values()) {
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for (const set of iterateStyleDeclSetFromStyleRoot(root)) {
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decls.push(...set.decls);
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}
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}
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yield { decls };
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}
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}
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}
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}
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});
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