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Moonchild
368 lines
12 KiB
JavaScript
368 lines
12 KiB
JavaScript
/*jshint curly:true, eqeqeq:true, laxbreak:true, noempty:false */
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/*
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The MIT License (MIT)
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Copyright (c) 2007-2013 Einar Lielmanis and contributors.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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CSS Beautifier
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---------------
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Written by Harutyun Amirjanyan, (amirjanyan@gmail.com)
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Based on code initially developed by: Einar Lielmanis, <einar@jsbeautifier.org>
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http://jsbeautifier.org/
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Usage:
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css_beautify(source_text);
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css_beautify(source_text, options);
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The options are (default in brackets):
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indent_size (4) — indentation size,
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indent_char (space) — character to indent with,
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selector_separator_newline (true) - separate selectors with newline or
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not (e.g. "a,\nbr" or "a, br")
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end_with_newline (false) - end with a newline
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e.g
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css_beautify(css_source_text, {
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'indent_size': 1,
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'indent_char': '\t',
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'selector_separator': ' ',
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'end_with_newline': false,
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});
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*/
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// http://www.w3.org/TR/CSS21/syndata.html#tokenization
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// http://www.w3.org/TR/css3-syntax/
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(function () {
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function css_beautify(source_text, options) {
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options = options || {};
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var indentSize = options.indent_size || 4;
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var indentCharacter = options.indent_char || ' ';
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var selectorSeparatorNewline = (options.selector_separator_newline === undefined) ? true : options.selector_separator_newline;
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var endWithNewline = (options.end_with_newline === undefined) ? false : options.end_with_newline;
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// compatibility
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if (typeof indentSize === "string") {
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indentSize = parseInt(indentSize, 10);
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}
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// tokenizer
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var whiteRe = /^\s+$/;
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var wordRe = /[\w$\-_]/;
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var pos = -1,
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ch;
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function next() {
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ch = source_text.charAt(++pos);
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return ch;
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}
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function peek() {
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return source_text.charAt(pos + 1);
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}
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function eatString(endChar) {
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var start = pos;
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while (next()) {
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if (ch === "\\") {
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next();
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next();
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} else if (ch === endChar) {
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break;
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} else if (ch === "\n") {
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break;
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}
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}
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return source_text.substring(start, pos + 1);
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}
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function eatWhitespace() {
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var start = pos;
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while (whiteRe.test(peek())) {
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pos++;
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}
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return pos !== start;
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}
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function skipWhitespace() {
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var start = pos;
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do {} while (whiteRe.test(next()));
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return pos !== start + 1;
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}
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function eatComment(singleLine) {
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var start = pos;
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next();
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while (next()) {
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if (ch === "*" && peek() === "/") {
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pos++;
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break;
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} else if (singleLine && ch === "\n") {
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break;
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}
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}
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return source_text.substring(start, pos + 1);
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}
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function lookBack(str) {
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return source_text.substring(pos - str.length, pos).toLowerCase() ===
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str;
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}
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function isCommentOnLine() {
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var endOfLine = source_text.indexOf('\n', pos);
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if (endOfLine === -1) {
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return false;
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}
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var restOfLine = source_text.substring(pos, endOfLine);
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return restOfLine.indexOf('//') !== -1;
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}
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// printer
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var indentString = source_text.match(/^[\r\n]*[\t ]*/)[0];
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var singleIndent = new Array(indentSize + 1).join(indentCharacter);
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var indentLevel = 0;
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var nestedLevel = 0;
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function indent() {
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indentLevel++;
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indentString += singleIndent;
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}
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function outdent() {
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indentLevel--;
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indentString = indentString.slice(0, -indentSize);
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}
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var print = {};
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print["{"] = function (ch) {
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print.singleSpace();
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output.push(ch);
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print.newLine();
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};
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print["}"] = function (ch) {
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print.newLine();
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output.push(ch);
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print.newLine();
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};
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print._lastCharWhitespace = function () {
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return whiteRe.test(output[output.length - 1]);
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};
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print.newLine = function (keepWhitespace) {
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if (!keepWhitespace) {
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while (print._lastCharWhitespace()) {
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output.pop();
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}
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}
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if (output.length) {
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output.push('\n');
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}
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if (indentString) {
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output.push(indentString);
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}
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};
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print.singleSpace = function () {
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if (output.length && !print._lastCharWhitespace()) {
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output.push(' ');
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}
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};
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var output = [];
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if (indentString) {
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output.push(indentString);
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}
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/*_____________________--------------------_____________________*/
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var insideRule = false;
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var enteringConditionalGroup = false;
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while (true) {
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var isAfterSpace = skipWhitespace();
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if (!ch) {
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break;
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} else if (ch === '/' && peek() === '*') { /* css comment */
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print.newLine();
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output.push(eatComment(), "\n", indentString);
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var header = lookBack("");
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if (header) {
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print.newLine();
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}
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} else if (ch === '/' && peek() === '/') { // single line comment
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output.push(eatComment(true), indentString);
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} else if (ch === '@') {
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// strip trailing space, if present, for hash property checks
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var atRule = eatString(" ").replace(/ $/, '');
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// pass along the space we found as a separate item
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output.push(atRule, ch);
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// might be a nesting at-rule
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if (atRule in css_beautify.NESTED_AT_RULE) {
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nestedLevel += 1;
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if (atRule in css_beautify.CONDITIONAL_GROUP_RULE) {
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enteringConditionalGroup = true;
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}
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}
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} else if (ch === '{') {
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eatWhitespace();
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if (peek() === '}') {
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next();
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output.push(" {}");
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} else {
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indent();
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print["{"](ch);
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// when entering conditional groups, only rulesets are allowed
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if (enteringConditionalGroup) {
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enteringConditionalGroup = false;
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insideRule = (indentLevel > nestedLevel);
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} else {
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// otherwise, declarations are also allowed
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insideRule = (indentLevel >= nestedLevel);
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}
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}
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} else if (ch === '}') {
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outdent();
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print["}"](ch);
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insideRule = false;
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if (nestedLevel) {
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nestedLevel--;
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}
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} else if (ch === ":") {
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eatWhitespace();
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if (insideRule || enteringConditionalGroup) {
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// 'property: value' delimiter
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// which could be in a conditional group query
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output.push(ch, " ");
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} else {
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if (peek() === ":") {
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// pseudo-element
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next();
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output.push("::");
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} else {
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// pseudo-class
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output.push(ch);
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}
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}
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} else if (ch === '"' || ch === '\'') {
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output.push(eatString(ch));
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} else if (ch === ';') {
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if (isCommentOnLine()) {
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var beforeComment = eatString('/');
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var comment = eatComment(true);
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output.push(beforeComment, comment.substring(1, comment.length - 1), '\n', indentString);
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} else {
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output.push(ch, '\n', indentString);
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}
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} else if (ch === '(') { // may be a url
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if (lookBack("url")) {
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output.push(ch);
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eatWhitespace();
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if (next()) {
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if (ch !== ')' && ch !== '"' && ch !== '\'') {
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output.push(eatString(')'));
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} else {
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pos--;
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}
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}
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} else {
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if (isAfterSpace) {
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print.singleSpace();
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}
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output.push(ch);
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eatWhitespace();
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}
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} else if (ch === ')') {
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output.push(ch);
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} else if (ch === ',') {
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eatWhitespace();
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output.push(ch);
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if (!insideRule && selectorSeparatorNewline) {
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print.newLine();
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} else {
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print.singleSpace();
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}
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} else if (ch === ']') {
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output.push(ch);
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} else if (ch === '[') {
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if (isAfterSpace) {
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print.singleSpace();
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}
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output.push(ch);
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} else if (ch === '=') { // no whitespace before or after
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eatWhitespace();
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output.push(ch);
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} else {
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if (isAfterSpace) {
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print.singleSpace();
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}
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output.push(ch);
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}
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}
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var sweetCode = output.join('').replace(/[\n ]+$/, '');
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// establish end_with_newline
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var should = endWithNewline;
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var actually = /\n$/.test(sweetCode);
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if (should && !actually) {
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sweetCode += "\n";
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} else if (!should && actually) {
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sweetCode = sweetCode.slice(0, -1);
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}
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return sweetCode;
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}
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// https://developer.mozilla.org/en-US/docs/Web/CSS/At-rule
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css_beautify.NESTED_AT_RULE = {
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"@page": true,
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"@font-face": true,
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"@keyframes": true,
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// also in CONDITIONAL_GROUP_RULE below
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"@media": true,
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"@supports": true,
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"@document": true
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};
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css_beautify.CONDITIONAL_GROUP_RULE = {
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"@media": true,
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"@supports": true,
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"@document": true
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};
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exports.cssBeautify = css_beautify;
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}());
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