first commit

node_modules/css-tree/cjs/syntax/node/FeatureRange.cjs

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+'use strict';
+
+const types = require('../../tokenizer/types.cjs');
+
+const LESSTHANSIGN = 60;    // <
+const EQUALSIGN = 61;       // =
+const GREATERTHANSIGN = 62; // >
+
+const name = 'FeatureRange';
+const structure = {
+    kind: String,
+    left: ['Identifier', 'Number', 'Dimension', 'Ratio'],
+    leftComparison: String,
+    middle: ['Identifier', 'Number', 'Dimension', 'Ratio'],
+    rightComparison: [String, null],
+    right: ['Identifier', 'Number', 'Dimension', 'Ratio', null]
+};
+
+function readTerm() {
+    this.skipSC();
+
+    switch (this.tokenType) {
+        case types.Number:
+            if (this.lookupNonWSType(1) === types.Delim) {
+                return this.Ratio();
+            } else {
+                return this.Number();
+            }
+
+        case types.Dimension:
+            return this.Dimension();
+
+        case types.Ident:
+            return this.Identifier();
+
+        default:
+            this.error('Number, dimension, ratio or identifier is expected');
+    }
+}
+
+function readComparison(expectColon) {
+    this.skipSC();
+
+    if (this.isDelim(LESSTHANSIGN) ||
+        this.isDelim(GREATERTHANSIGN)) {
+        const value = this.source[this.tokenStart];
+
+        this.next();
+
+        if (this.isDelim(EQUALSIGN)) {
+            this.next();
+            return value + '=';
+        }
+
+        return value;
+    }
+
+    if (this.isDelim(EQUALSIGN)) {
+        return '=';
+    }
+
+    this.error(`Expected ${expectColon ? '":", ' : ''}"<", ">", "=" or ")"`);
+}
+
+function parse(kind = 'unknown') {
+    const start = this.tokenStart;
+
+    this.skipSC();
+    this.eat(types.LeftParenthesis);
+
+    const left = readTerm.call(this);
+    const leftComparison = readComparison.call(this, left.type === 'Identifier');
+    const middle = readTerm.call(this);
+    let rightComparison = null;
+    let right = null;
+
+    if (this.lookupNonWSType(0) !== types.RightParenthesis) {
+        rightComparison = readComparison.call(this);
+        right = readTerm.call(this);
+    }
+
+    this.skipSC();
+    this.eat(types.RightParenthesis);
+
+    return {
+        type: 'FeatureRange',
+        loc: this.getLocation(start, this.tokenStart),
+        kind,
+        left,
+        leftComparison,
+        middle,
+        rightComparison,
+        right
+    };
+}
+
+function generate(node) {
+    this.token(types.LeftParenthesis, '(');
+    this.node(node.left);
+    this.tokenize(node.leftComparison);
+    this.node(node.middle);
+
+    if (node.right) {
+        this.tokenize(node.rightComparison);
+        this.node(node.right);
+    }
+
+    this.token(types.RightParenthesis, ')');
+}
+
+exports.generate = generate;
+exports.name = name;
+exports.parse = parse;
+exports.structure = structure;