290 lines
10 KiB
JavaScript
290 lines
10 KiB
JavaScript
'use strict';
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const utils = require('./utils');
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function parser(code, options, config) {
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if (typeof code !== 'string') {
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throw new TypeError('Input code/text/html must be a string.');
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}
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if (options !== undefined && typeof(options) !== 'object') {
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throw new TypeError('Parameter \'options\' must be an object.');
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}
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const len = code.length, // code length;
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optSafe = options && options.safe, // 'safe' option;
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optSpace = options && options.space, // 'space' option;
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optTrim = options && options.trim, // 'trim' option;
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EOL = utils.getEOL(code); // get EOL from the code;
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let idx = 0, // current index;
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s = '', // resulting code;
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emptyLine = true, // set while no symbols encountered on the current line;
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emptyLetters = '', // empty letters on a new line;
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isHtml, // set when the input is recognized as HTML;
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regEx = []; // regular expression details;
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if (!len) {
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return code;
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}
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if (config.parse) {
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isHtml = utils.isHtml(code);
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if (!isHtml) {
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regEx = utils.parseRegEx(code);
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}
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} else {
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isHtml = config.html;
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}
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if (options && options.ignore) {
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let ignore = options.ignore;
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if (ignore instanceof RegExp) {
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ignore = [ignore];
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} else {
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if (ignore instanceof Array) {
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ignore = ignore.filter(f => f instanceof RegExp);
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if (!ignore.length) {
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ignore = null;
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}
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} else {
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ignore = null;
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}
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}
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if (ignore) {
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for (let i = 0; i < ignore.length; i++) {
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const reg = ignore[i];
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let match;
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do {
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match = reg.exec(code);
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if (match) {
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regEx.push({
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start: match.index,
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end: match.index + match[0].length - 1
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});
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}
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} while (match && reg.global);
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}
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regEx = regEx.sort((a, b) => a.start - b.start);
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}
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}
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do {
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if (!isHtml && code[idx] === '/' && idx < len - 1 && (!idx || code[idx - 1] !== '\\')) {
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if (code[idx + 1] === '/') {
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if (inRegEx()) {
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if (emptyLetters) {
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s += emptyLetters;
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emptyLetters = '';
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}
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s += '/';
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continue;
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}
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const lb1 = code.indexOf(EOL, idx + 2);
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if (lb1 < 0) {
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break;
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}
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if (emptyLine) {
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emptyLetters = '';
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if (optSpace) {
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idx = lb1 - 1; // just before the line break;
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} else {
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idx = lb1 + EOL.length - 1; // last symbol of the line break;
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trim();
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}
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} else {
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idx = lb1 - 1; // just before the line break;
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}
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continue;
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}
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if (code[idx + 1] === '*') {
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if (inRegEx()) {
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if (emptyLetters) {
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s += emptyLetters;
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emptyLetters = '';
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}
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s += '/';
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continue;
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}
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const end1 = code.indexOf('*/', idx + 2),
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keep1 = optSafe && idx < len - 2 && code[idx + 2] === '!';
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if (keep1) {
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if (end1 >= 0) {
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s += code.substr(idx, end1 - idx + 2);
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} else {
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s += code.substr(idx, len - idx);
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}
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}
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if (end1 < 0) {
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break;
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}
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const comment1 = code.substr(idx, end1 - idx + 2);
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idx = end1 + 1;
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if (emptyLine) {
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emptyLetters = '';
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}
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if (!keep1) {
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const parts1 = comment1.split(EOL);
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if (optSpace) {
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for (let k1 = 0; k1 < parts1.length - 1; k1++) {
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s += EOL;
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}
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}
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const lb2 = code.indexOf(EOL, idx + 1);
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if (lb2 > idx) {
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let gapIdx1 = lb2 - 1;
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while ((code[gapIdx1] === ' ' || code[gapIdx1] === '\t') && --gapIdx1 > idx) ;
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if (gapIdx1 === idx) {
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if (emptyLine && !optSpace) {
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idx = lb2 + EOL.length - 1; // last symbol of the line break;
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trim();
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}
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} else {
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if (optSpace) {
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s += utils.getSpaces(parts1[parts1.length - 1].length);
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}
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}
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} else {
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if (optSpace) {
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let gapIdx2 = idx + 1;
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while ((code[gapIdx2] === ' ' || code[gapIdx2] === '\t') && ++gapIdx2 < len) ;
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if (gapIdx2 < len) {
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s += utils.getSpaces(parts1[parts1.length - 1].length);
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}
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}
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}
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}
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continue;
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}
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}
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if (isHtml && code[idx] === '<' && idx < len - 3 && code.substr(idx + 1, 3) === '!--') {
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if (inRegEx()) {
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if (emptyLetters) {
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s += emptyLetters;
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emptyLetters = '';
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}
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s += '<';
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continue;
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}
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const end2 = code.indexOf('-->', idx + 4),
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keep2 = optSafe && code.substr(idx + 4, 3) === '[if';
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if (keep2) {
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if (end2 >= 0) {
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s += code.substr(idx, end2 - idx + 3);
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} else {
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s += code.substr(idx, len - idx);
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}
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}
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if (end2 < 0) {
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break;
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}
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const comment2 = code.substr(idx, end2 - idx + 3);
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idx = end2 + 2;
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if (emptyLine) {
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emptyLetters = '';
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}
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if (!keep2) {
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const parts2 = comment2.split(EOL);
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if (optSpace) {
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for (let k2 = 0; k2 < parts2.length - 1; k2++) {
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s += EOL;
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}
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}
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const lb3 = code.indexOf(EOL, idx + 1);
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if (lb3 > idx) {
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let gapIdx3 = lb3 - 1;
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while ((code[gapIdx3] === ' ' || code[gapIdx3] === '\t') && --gapIdx3 > idx) ;
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if (gapIdx3 === idx) {
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if (emptyLine && !optSpace) {
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idx = lb3 + EOL.length - 1; // last symbol of the line break;
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trim();
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}
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} else {
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if (optSpace) {
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s += utils.getSpaces(parts2[parts2.length - 1].length);
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}
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}
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} else {
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if (optSpace) {
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let gapIdx4 = idx + 1;
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while ((code[gapIdx4] === ' ' || code[gapIdx4] === '\t') && ++gapIdx4 < len) ;
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if (gapIdx4 < len) {
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s += utils.getSpaces(parts2[parts2.length - 1].length);
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}
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}
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}
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}
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continue;
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}
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const symbol = code[idx],
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isSpace = symbol === ' ' || symbol === '\t';
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if (symbol === '\r' || symbol === '\n') {
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if (code.indexOf(EOL, idx) === idx) {
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emptyLine = true;
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}
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} else {
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if (!isSpace) {
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emptyLine = false;
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s += emptyLetters;
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emptyLetters = '';
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}
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}
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if (emptyLine && isSpace) {
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emptyLetters += symbol;
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} else {
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s += symbol;
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}
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if (!isHtml && (symbol === '\'' || symbol === '"' || symbol === '`') && (!idx || code[idx - 1] !== '\\')) {
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if (inRegEx()) {
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continue;
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}
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let closeIdx = idx;
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do {
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closeIdx = code.indexOf(symbol, closeIdx + 1);
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if (closeIdx > 0) {
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let shIdx = closeIdx;
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while (code[--shIdx] === '\\') ;
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if ((closeIdx - shIdx) % 2) {
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break;
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}
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}
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} while (closeIdx > 0);
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if (closeIdx < 0) {
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break;
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}
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s += code.substr(idx + 1, closeIdx - idx);
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idx = closeIdx;
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}
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} while (++idx < len);
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function inRegEx() {
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if (regEx.length) {
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return utils.indexInRegEx(idx, regEx);
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}
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}
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function trim() {
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if (optTrim) {
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let startIdx, endIdx, i;
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do {
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startIdx = idx + 1;
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endIdx = code.indexOf(EOL, startIdx);
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i = startIdx;
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while ((code[i] === ' ' || code[i] === '\t') && ++i < endIdx) ;
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if (i === endIdx) {
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idx = endIdx + EOL.length - 1;
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}
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} while (i === endIdx);
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}
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}
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return s;
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}
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module.exports = parser;
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