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node_modules/postcss-selector-parser/dist/util/unesc.js

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+"use strict";
+// Many thanks for this post which made this migration much easier.
+// https://mathiasbynens.be/notes/css-escapes
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = unesc;
+/**
+ *
+ * @param {string} str
+ * @returns {[string, number]|undefined}
+ */
+function gobbleHex(str) {
+    var lower = str.toLowerCase();
+    var hex = "";
+    var spaceTerminated = false;
+    for (var i = 0; i < 6 && lower[i] !== undefined; i++) {
+        var code = lower.charCodeAt(i);
+        // check to see if we are dealing with a valid hex char [a-f|0-9]
+        var valid = (code >= 97 && code <= 102) || (code >= 48 && code <= 57);
+        // https://drafts.csswg.org/css-syntax/#consume-escaped-code-point
+        spaceTerminated = code === 32;
+        if (!valid) {
+            break;
+        }
+        hex += lower[i];
+    }
+    if (hex.length === 0) {
+        return undefined;
+    }
+    var codePoint = parseInt(hex, 16);
+    var isSurrogate = codePoint >= 0xd800 && codePoint <= 0xdfff;
+    // Add special case for
+    // "If this number is zero, or is for a surrogate, or is greater than the maximum allowed code point"
+    // https://drafts.csswg.org/css-syntax/#maximum-allowed-code-point
+    if (isSurrogate || codePoint === 0x0000 || codePoint > 0x10ffff) {
+        return ["\uFFFD", hex.length + (spaceTerminated ? 1 : 0)];
+    }
+    return [String.fromCodePoint(codePoint), hex.length + (spaceTerminated ? 1 : 0)];
+}
+var CONTAINS_ESCAPE = /\\/;
+function unesc(str) {
+    var needToProcess = CONTAINS_ESCAPE.test(str);
+    if (!needToProcess) {
+        return str;
+    }
+    var ret = "";
+    for (var i = 0; i < str.length; i++) {
+        if (str[i] === "\\") {
+            var gobbled = gobbleHex(str.slice(i + 1, i + 7));
+            if (gobbled !== undefined) {
+                ret += gobbled[0];
+                i += gobbled[1];
+                continue;
+            }
+            // Retain a pair of \\ if double escaped `\\\\`
+            // https://github.com/postcss/postcss-selector-parser/commit/268c9a7656fb53f543dc620aa5b73a30ec3ff20e
+            if (str[i + 1] === "\\") {
+                ret += "\\";
+                i++;
+                continue;
+            }
+            // if \\ is at the end of the string retain it
+            // https://github.com/postcss/postcss-selector-parser/commit/01a6b346e3612ce1ab20219acc26abdc259ccefb
+            if (str.length === i + 1) {
+                ret += str[i];
+            }
+            continue;
+        }
+        ret += str[i];
+    }
+    return ret;
+}
+//# sourceMappingURL=unesc.js.map