Studying all day long)
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'use strict';
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$1 = "+".charCodeAt(0);
var isUnicodeRange = /^[a-f0-9?-]+$/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$1 === 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 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
var 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)
};
};
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 = unit;
ValueParser.walk = walk;
ValueParser.stringify = stringify;
var lib = ValueParser;
exports.lib = lib;