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import { fileURLToPath as __cjs_fileURLToPath } from 'node:url';
import { dirname as __cjs_dirname } from 'node:path';
import { createRequire as __cjs_createRequire } from 'node:module';

const __filename = __cjs_fileURLToPath(import.meta.url);
const __dirname = __cjs_dirname(__filename);
const require = __cjs_createRequire(import.meta.url);
const __require = require;
var openParentheses = "(".charCodeAt(0);
var closeParentheses = ")".charCodeAt(0);
var singleQuote = "'".charCodeAt(0);
var doubleQuote = '"'.charCodeAt(0);
var backslash = "\\".charCodeAt(0);
var slash = "/".charCodeAt(0);
var comma = ",".charCodeAt(0);
var colon = ":".charCodeAt(0);
var star = "*".charCodeAt(0);
var uLower = "u".charCodeAt(0);
var uUpper = "U".charCodeAt(0);
var plus = "+".charCodeAt(0);
var isUnicodeRange = /^[a-f0-9?-]+$/i;

var parse$1 = function(input) {
  var tokens = [];
  var value = input;

  var next,
    quote,
    prev,
    token,
    escape,
    escapePos,
    whitespacePos,
    parenthesesOpenPos;
  var pos = 0;
  var code = value.charCodeAt(pos);
  var max = value.length;
  var stack = [{ nodes: tokens }];
  var balanced = 0;
  var parent;

  var name = "";
  var before = "";
  var after = "";

  while (pos < max) {
    // Whitespaces
    if (code <= 32) {
      next = pos;
      do {
        next += 1;
        code = value.charCodeAt(next);
      } while (code <= 32);
      token = value.slice(pos, next);

      prev = tokens[tokens.length - 1];
      if (code === closeParentheses && balanced) {
        after = token;
      } else if (prev && prev.type === "div") {
        prev.after = token;
        prev.sourceEndIndex += token.length;
      } else if (
        code === comma ||
        code === colon ||
        (code === slash &&
          value.charCodeAt(next + 1) !== star &&
          (!parent ||
            (parent && parent.type === "function" && parent.value !== "calc")))
      ) {
        before = token;
      } else {
        tokens.push({
          type: "space",
          sourceIndex: pos,
          sourceEndIndex: next,
          value: token
        });
      }

      pos = next;

      // Quotes
    } else if (code === singleQuote || code === doubleQuote) {
      next = pos;
      quote = code === singleQuote ? "'" : '"';
      token = {
        type: "string",
        sourceIndex: pos,
        quote: quote
      };
      do {
        escape = false;
        next = value.indexOf(quote, next + 1);
        if (~next) {
          escapePos = next;
          while (value.charCodeAt(escapePos - 1) === backslash) {
            escapePos -= 1;
            escape = !escape;
          }
        } else {
          value += quote;
          next = value.length - 1;
          token.unclosed = true;
        }
      } while (escape);
      token.value = value.slice(pos + 1, next);
      token.sourceEndIndex = token.unclosed ? next : next + 1;
      tokens.push(token);
      pos = next + 1;
      code = value.charCodeAt(pos);

      // Comments
    } else if (code === slash && value.charCodeAt(pos + 1) === star) {
      next = value.indexOf("*/", pos);

      token = {
        type: "comment",
        sourceIndex: pos,
        sourceEndIndex: next + 2
      };

      if (next === -1) {
        token.unclosed = true;
        next = value.length;
        token.sourceEndIndex = next;
      }

      token.value = value.slice(pos + 2, next);
      tokens.push(token);

      pos = next + 2;
      code = value.charCodeAt(pos);

      // Operation within calc
    } else if (
      (code === slash || code === star) &&
      parent &&
      parent.type === "function" &&
      parent.value === "calc"
    ) {
      token = value[pos];
      tokens.push({
        type: "word",
        sourceIndex: pos - before.length,
        sourceEndIndex: pos + token.length,
        value: token
      });
      pos += 1;
      code = value.charCodeAt(pos);

      // Dividers
    } else if (code === slash || code === comma || code === colon) {
      token = value[pos];

      tokens.push({
        type: "div",
        sourceIndex: pos - before.length,
        sourceEndIndex: pos + token.length,
        value: token,
        before: before,
        after: ""
      });
      before = "";

      pos += 1;
      code = value.charCodeAt(pos);

      // Open parentheses
    } else if (openParentheses === code) {
      // Whitespaces after open parentheses
      next = pos;
      do {
        next += 1;
        code = value.charCodeAt(next);
      } while (code <= 32);
      parenthesesOpenPos = pos;
      token = {
        type: "function",
        sourceIndex: pos - name.length,
        value: name,
        before: value.slice(parenthesesOpenPos + 1, next)
      };
      pos = next;

      if (name === "url" && code !== singleQuote && code !== doubleQuote) {
        next -= 1;
        do {
          escape = false;
          next = value.indexOf(")", next + 1);
          if (~next) {
            escapePos = next;
            while (value.charCodeAt(escapePos - 1) === backslash) {
              escapePos -= 1;
              escape = !escape;
            }
          } else {
            value += ")";
            next = value.length - 1;
            token.unclosed = true;
          }
        } while (escape);
        // Whitespaces before closed
        whitespacePos = next;
        do {
          whitespacePos -= 1;
          code = value.charCodeAt(whitespacePos);
        } while (code <= 32);
        if (parenthesesOpenPos < whitespacePos) {
          if (pos !== whitespacePos + 1) {
            token.nodes = [
              {
                type: "word",
                sourceIndex: pos,
                sourceEndIndex: whitespacePos + 1,
                value: value.slice(pos, whitespacePos + 1)
              }
            ];
          } else {
            token.nodes = [];
          }
          if (token.unclosed && whitespacePos + 1 !== next) {
            token.after = "";
            token.nodes.push({
              type: "space",
              sourceIndex: whitespacePos + 1,
              sourceEndIndex: next,
              value: value.slice(whitespacePos + 1, next)
            });
          } else {
            token.after = value.slice(whitespacePos + 1, next);
            token.sourceEndIndex = next;
          }
        } else {
          token.after = "";
          token.nodes = [];
        }
        pos = next + 1;
        token.sourceEndIndex = token.unclosed ? next : pos;
        code = value.charCodeAt(pos);
        tokens.push(token);
      } else {
        balanced += 1;
        token.after = "";
        token.sourceEndIndex = pos + 1;
        tokens.push(token);
        stack.push(token);
        tokens = token.nodes = [];
        parent = token;
      }
      name = "";

      // Close parentheses
    } else if (closeParentheses === code && balanced) {
      pos += 1;
      code = value.charCodeAt(pos);

      parent.after = after;
      parent.sourceEndIndex += after.length;
      after = "";
      balanced -= 1;
      stack[stack.length - 1].sourceEndIndex = pos;
      stack.pop();
      parent = stack[balanced];
      tokens = parent.nodes;

      // Words
    } else {
      next = pos;
      do {
        if (code === backslash) {
          next += 1;
        }
        next += 1;
        code = value.charCodeAt(next);
      } while (
        next < max &&
        !(
          code <= 32 ||
          code === singleQuote ||
          code === doubleQuote ||
          code === comma ||
          code === colon ||
          code === slash ||
          code === openParentheses ||
          (code === star &&
            parent &&
            parent.type === "function" &&
            parent.value === "calc") ||
          (code === slash &&
            parent.type === "function" &&
            parent.value === "calc") ||
          (code === closeParentheses && balanced)
        )
      );
      token = value.slice(pos, next);

      if (openParentheses === code) {
        name = token;
      } else if (
        (uLower === token.charCodeAt(0) || uUpper === token.charCodeAt(0)) &&
        plus === token.charCodeAt(1) &&
        isUnicodeRange.test(token.slice(2))
      ) {
        tokens.push({
          type: "unicode-range",
          sourceIndex: pos,
          sourceEndIndex: next,
          value: token
        });
      } else {
        tokens.push({
          type: "word",
          sourceIndex: pos,
          sourceEndIndex: next,
          value: token
        });
      }

      pos = next;
    }
  }

  for (pos = stack.length - 1; pos; pos -= 1) {
    stack[pos].unclosed = true;
    stack[pos].sourceEndIndex = value.length;
  }

  return stack[0].nodes;
};

var walk$1 = function walk(nodes, cb, bubble) {
  var i, max, node, result;

  for (i = 0, max = nodes.length; i < max; i += 1) {
    node = nodes[i];
    if (!bubble) {
      result = cb(node, i, nodes);
    }

    if (
      result !== false &&
      node.type === "function" &&
      Array.isArray(node.nodes)
    ) {
      walk(node.nodes, cb, bubble);
    }

    if (bubble) {
      cb(node, i, nodes);
    }
  }
};

function stringifyNode(node, custom) {
  var type = node.type;
  var value = node.value;
  var buf;
  var customResult;

  if (custom && (customResult = custom(node)) !== undefined) {
    return customResult;
  } else if (type === "word" || type === "space") {
    return value;
  } else if (type === "string") {
    buf = node.quote || "";
    return buf + value + (node.unclosed ? "" : buf);
  } else if (type === "comment") {
    return "/*" + value + (node.unclosed ? "" : "*/");
  } else if (type === "div") {
    return (node.before || "") + value + (node.after || "");
  } else if (Array.isArray(node.nodes)) {
    buf = stringify$1(node.nodes, custom);
    if (type !== "function") {
      return buf;
    }
    return (
      value +
      "(" +
      (node.before || "") +
      buf +
      (node.after || "") +
      (node.unclosed ? "" : ")")
    );
  }
  return value;
}

function stringify$1(nodes, custom) {
  var result, i;

  if (Array.isArray(nodes)) {
    result = "";
    for (i = nodes.length - 1; ~i; i -= 1) {
      result = stringifyNode(nodes[i], custom) + result;
    }
    return result;
  }
  return stringifyNode(nodes, custom);
}

var stringify_1 = stringify$1;

var unit;
var hasRequiredUnit;

function requireUnit () {
	if (hasRequiredUnit) return unit;
	hasRequiredUnit = 1;
	var minus = "-".charCodeAt(0);
	var plus = "+".charCodeAt(0);
	var dot = ".".charCodeAt(0);
	var exp = "e".charCodeAt(0);
	var EXP = "E".charCodeAt(0);

	// Check if three code points would start a number
	// https://www.w3.org/TR/css-syntax-3/#starts-with-a-number
	function likeNumber(value) {
	  var code = value.charCodeAt(0);
	  var nextCode;

	  if (code === plus || code === minus) {
	    nextCode = value.charCodeAt(1);

	    if (nextCode >= 48 && nextCode <= 57) {
	      return true;
	    }

	    var nextNextCode = value.charCodeAt(2);

	    if (nextCode === dot && nextNextCode >= 48 && nextNextCode <= 57) {
	      return true;
	    }

	    return false;
	  }

	  if (code === dot) {
	    nextCode = value.charCodeAt(1);

	    if (nextCode >= 48 && nextCode <= 57) {
	      return true;
	    }

	    return false;
	  }

	  if (code >= 48 && code <= 57) {
	    return true;
	  }

	  return false;
	}

	// Consume a number
	// https://www.w3.org/TR/css-syntax-3/#consume-number
	unit = function(value) {
	  var pos = 0;
	  var length = value.length;
	  var code;
	  var nextCode;
	  var nextNextCode;

	  if (length === 0 || !likeNumber(value)) {
	    return false;
	  }

	  code = value.charCodeAt(pos);

	  if (code === plus || code === minus) {
	    pos++;
	  }

	  while (pos < length) {
	    code = value.charCodeAt(pos);

	    if (code < 48 || code > 57) {
	      break;
	    }

	    pos += 1;
	  }

	  code = value.charCodeAt(pos);
	  nextCode = value.charCodeAt(pos + 1);

	  if (code === dot && nextCode >= 48 && nextCode <= 57) {
	    pos += 2;

	    while (pos < length) {
	      code = value.charCodeAt(pos);

	      if (code < 48 || code > 57) {
	        break;
	      }

	      pos += 1;
	    }
	  }

	  code = value.charCodeAt(pos);
	  nextCode = value.charCodeAt(pos + 1);
	  nextNextCode = value.charCodeAt(pos + 2);

	  if (
	    (code === exp || code === EXP) &&
	    ((nextCode >= 48 && nextCode <= 57) ||
	      ((nextCode === plus || nextCode === minus) &&
	        nextNextCode >= 48 &&
	        nextNextCode <= 57))
	  ) {
	    pos += nextCode === plus || nextCode === minus ? 3 : 2;

	    while (pos < length) {
	      code = value.charCodeAt(pos);

	      if (code < 48 || code > 57) {
	        break;
	      }

	      pos += 1;
	    }
	  }

	  return {
	    number: value.slice(0, pos),
	    unit: value.slice(pos)
	  };
	};
	return unit;
}

var parse = parse$1;
var walk = walk$1;
var stringify = stringify_1;

function ValueParser(value) {
  if (this instanceof ValueParser) {
    this.nodes = parse(value);
    return this;
  }
  return new ValueParser(value);
}

ValueParser.prototype.toString = function() {
  return Array.isArray(this.nodes) ? stringify(this.nodes) : "";
};

ValueParser.prototype.walk = function(cb, bubble) {
  walk(this.nodes, cb, bubble);
  return this;
};

ValueParser.unit = requireUnit();

ValueParser.walk = walk;

ValueParser.stringify = stringify;

var lib = ValueParser;

export { lib as l };