planning

node_modules/stylis/src/Parser.js

@@ -0,0 +1,191 @@
+import {COMMENT, RULESET, DECLARATION} from './Enum.js'
+import {abs, charat, trim, from, sizeof, strlen, substr, append, replace, indexof} from './Utility.js'
+import {node, char, prev, next, peek, caret, alloc, dealloc, delimit, whitespace, escaping, identifier, commenter} from './Tokenizer.js'
+
+/**
+ * @param {string} value
+ * @return {object[]}
+ */
+export function compile (value) {
+	return dealloc(parse('', null, null, null, [''], value = alloc(value), 0, [0], value))
+}
+
+/**
+ * @param {string} value
+ * @param {object} root
+ * @param {object?} parent
+ * @param {string[]} rule
+ * @param {string[]} rules
+ * @param {string[]} rulesets
+ * @param {number[]} pseudo
+ * @param {number[]} points
+ * @param {string[]} declarations
+ * @return {object}
+ */
+export function parse (value, root, parent, rule, rules, rulesets, pseudo, points, declarations) {
+	var index = 0
+	var offset = 0
+	var length = pseudo
+	var atrule = 0
+	var property = 0
+	var previous = 0
+	var variable = 1
+	var scanning = 1
+	var ampersand = 1
+	var character = 0
+	var type = ''
+	var props = rules
+	var children = rulesets
+	var reference = rule
+	var characters = type
+
+	while (scanning)
+		switch (previous = character, character = next()) {
+			// (
+			case 40:
+				if (previous != 108 && charat(characters, length - 1) == 58) {
+					if (indexof(characters += replace(delimit(character), '&', '&\f'), '&\f') != -1)
+						ampersand = -1
+					break
+				}
+			// " ' [
+			case 34: case 39: case 91:
+				characters += delimit(character)
+				break
+			// \t \n \r \s
+			case 9: case 10: case 13: case 32:
+				characters += whitespace(previous)
+				break
+			// \
+			case 92:
+				characters += escaping(caret() - 1, 7)
+				continue
+			// /
+			case 47:
+				switch (peek()) {
+					case 42: case 47:
+						append(comment(commenter(next(), caret()), root, parent), declarations)
+						break
+					default:
+						characters += '/'
+				}
+				break
+			// {
+			case 123 * variable:
+				points[index++] = strlen(characters) * ampersand
+			// } ; \0
+			case 125 * variable: case 59: case 0:
+				switch (character) {
+					// \0 }
+					case 0: case 125: scanning = 0
+					// ;
+					case 59 + offset: if (ampersand == -1) characters = replace(characters, /\f/g, '')
+						if (property > 0 && (strlen(characters) - length))
+							append(property > 32 ? declaration(characters + ';', rule, parent, length - 1) : declaration(replace(characters, ' ', '') + ';', rule, parent, length - 2), declarations)
+						break
+					// @ ;
+					case 59: characters += ';'
+					// { rule/at-rule
+					default:
+						append(reference = ruleset(characters, root, parent, index, offset, rules, points, type, props = [], children = [], length), rulesets)
+
+						if (character === 123)
+							if (offset === 0)
+								parse(characters, root, reference, reference, props, rulesets, length, points, children)
+							else
+								switch (atrule === 99 && charat(characters, 3) === 110 ? 100 : atrule) {
+									// d l m s
+									case 100: case 108: case 109: case 115:
+										parse(value, reference, reference, rule && append(ruleset(value, reference, reference, 0, 0, rules, points, type, rules, props = [], length), children), rules, children, length, points, rule ? props : children)
+										break
+									default:
+										parse(characters, reference, reference, reference, [''], children, 0, points, children)
+								}
+				}
+
+				index = offset = property = 0, variable = ampersand = 1, type = characters = '', length = pseudo
+				break
+			// :
+			case 58:
+				length = 1 + strlen(characters), property = previous
+			default:
+				if (variable < 1)
+					if (character == 123)
+						--variable
+					else if (character == 125 && variable++ == 0 && prev() == 125)
+						continue
+
+				switch (characters += from(character), character * variable) {
+					// &
+					case 38:
+						ampersand = offset > 0 ? 1 : (characters += '\f', -1)
+						break
+					// ,
+					case 44:
+						points[index++] = (strlen(characters) - 1) * ampersand, ampersand = 1
+						break
+					// @
+					case 64:
+						// -
+						if (peek() === 45)
+							characters += delimit(next())
+
+						atrule = peek(), offset = length = strlen(type = characters += identifier(caret())), character++
+						break
+					// -
+					case 45:
+						if (previous === 45 && strlen(characters) == 2)
+							variable = 0
+				}
+		}
+
+	return rulesets
+}
+
+/**
+ * @param {string} value
+ * @param {object} root
+ * @param {object?} parent
+ * @param {number} index
+ * @param {number} offset
+ * @param {string[]} rules
+ * @param {number[]} points
+ * @param {string} type
+ * @param {string[]} props
+ * @param {string[]} children
+ * @param {number} length
+ * @return {object}
+ */
+export function ruleset (value, root, parent, index, offset, rules, points, type, props, children, length) {
+	var post = offset - 1
+	var rule = offset === 0 ? rules : ['']
+	var size = sizeof(rule)
+
+	for (var i = 0, j = 0, k = 0; i < index; ++i)
+		for (var x = 0, y = substr(value, post + 1, post = abs(j = points[i])), z = value; x < size; ++x)
+			if (z = trim(j > 0 ? rule[x] + ' ' + y : replace(y, /&\f/g, rule[x])))
+				props[k++] = z
+
+	return node(value, root, parent, offset === 0 ? RULESET : type, props, children, length)
+}
+
+/**
+ * @param {number} value
+ * @param {object} root
+ * @param {object?} parent
+ * @return {object}
+ */
+export function comment (value, root, parent) {
+	return node(value, root, parent, COMMENT, from(char()), substr(value, 2, -2), 0)
+}
+
+/**
+ * @param {string} value
+ * @param {object} root
+ * @param {object?} parent
+ * @param {number} length
+ * @return {object}
+ */
+export function declaration (value, root, parent, length) {
+	return node(value, root, parent, DECLARATION, substr(value, 0, length), substr(value, length + 1, -1), length)
+}