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194 lines
5.7 KiB
JavaScript
194 lines
5.7 KiB
JavaScript
6 years ago
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var split = require('../utils/split');
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var COMMA = ',';
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var FORWARD_SLASH = '/';
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var AT_RULE = 'at-rule';
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var IMPORTANT_WORD = 'important';
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var IMPORTANT_TOKEN = '!'+IMPORTANT_WORD;
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var IMPORTANT_WORD_MATCH = new RegExp('^'+IMPORTANT_WORD+'$', 'i');
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var IMPORTANT_TOKEN_MATCH = new RegExp('^'+IMPORTANT_TOKEN+'$', 'i');
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function selectorName(value) {
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return value[0];
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}
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function noop() {}
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function withoutComments(string, into, heading, context) {
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var matcher = heading ? /^__ESCAPED_COMMENT_/ : /__ESCAPED_COMMENT_/;
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var track = heading ? context.track : noop; // don't track when comment not in a heading as we do it later in `trackComments`
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while (matcher.test(string)) {
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var startOfComment = string.indexOf('__');
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var endOfComment = string.indexOf('__', startOfComment + 1) + 2;
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var comment = string.substring(startOfComment, endOfComment);
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string = string.substring(0, startOfComment) + string.substring(endOfComment);
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track(comment);
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into.push(comment);
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}
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return string;
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}
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function withoutHeadingComments(string, into, context) {
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return withoutComments(string, into, true, context);
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}
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function withoutInnerComments(string, into, context) {
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return withoutComments(string, into, false, context);
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}
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function trackComments(comments, into, context) {
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for (var i = 0, l = comments.length; i < l; i++) {
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context.track(comments[i]);
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into.push(comments[i]);
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}
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}
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function extractProperties(string, selectors, context) {
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var list = [];
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var innerComments = [];
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var valueSeparator = /[\s,\/]/;
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if (typeof string != 'string')
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return [];
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if (string.indexOf(')') > -1)
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string = string.replace(/\)([^\s_;:,\)])/g, context.sourceMap ? ') __ESCAPED_COMMENT_CLEAN_CSS(0,-1)__ $1' : ') $1');
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if (string.indexOf('ESCAPED_URL_CLEAN_CSS') > -1)
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string = string.replace(/(ESCAPED_URL_CLEAN_CSS[^_]+?__)/g, context.sourceMap ? '$1 __ESCAPED_COMMENT_CLEAN_CSS(0,-1)__ ' : '$1 ');
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var candidates = split(string, ';', false, '{', '}');
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for (var i = 0, l = candidates.length; i < l; i++) {
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var candidate = candidates[i];
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var firstColonAt = candidate.indexOf(':');
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var atRule = candidate.trim()[0] == '@';
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if (atRule) {
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context.track(candidate);
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list.push([AT_RULE, candidate.trim()]);
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continue;
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}
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if (firstColonAt == -1) {
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context.track(candidate);
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if (candidate.indexOf('__ESCAPED_COMMENT_SPECIAL') > -1)
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list.push(candidate.trim());
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continue;
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}
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if (candidate.indexOf('{') > 0 && candidate.indexOf('{') < firstColonAt) {
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context.track(candidate);
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continue;
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}
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var body = [];
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var name = candidate.substring(0, firstColonAt);
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innerComments = [];
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if (name.indexOf('__ESCAPED_COMMENT') > -1)
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name = withoutHeadingComments(name, list, context);
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if (name.indexOf('__ESCAPED_COMMENT') > -1)
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name = withoutInnerComments(name, innerComments, context);
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body.push([name.trim()].concat(context.track(name, true)));
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context.track(':');
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trackComments(innerComments, list, context);
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var firstBraceAt = candidate.indexOf('{');
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var isVariable = name.trim().indexOf('--') === 0;
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if (isVariable && firstBraceAt > 0) {
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var blockPrefix = candidate.substring(firstColonAt + 1, firstBraceAt + 1);
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var blockSuffix = candidate.substring(candidate.indexOf('}'));
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var blockContent = candidate.substring(firstBraceAt + 1, candidate.length - blockSuffix.length);
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context.track(blockPrefix);
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body.push(extractProperties(blockContent, selectors, context));
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list.push(body);
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context.track(blockSuffix);
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context.track(i < l - 1 ? ';' : '');
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continue;
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}
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var values = split(candidate.substring(firstColonAt + 1), valueSeparator, true);
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if (values.length == 1 && values[0] === '') {
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context.warnings.push('Empty property \'' + name + '\' inside \'' + selectors.filter(selectorName).join(',') + '\' selector. Ignoring.');
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continue;
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}
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for (var j = 0, m = values.length; j < m; j++) {
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var value = values[j];
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var trimmed = value.trim();
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if (trimmed.length === 0)
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continue;
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var lastCharacter = trimmed[trimmed.length - 1];
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var endsWithNonSpaceSeparator = trimmed.length > 1 && (lastCharacter == COMMA || lastCharacter == FORWARD_SLASH);
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if (endsWithNonSpaceSeparator)
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trimmed = trimmed.substring(0, trimmed.length - 1);
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if (trimmed.indexOf('__ESCAPED_COMMENT_CLEAN_CSS(0,-') > -1) {
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context.track(trimmed);
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continue;
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}
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innerComments = [];
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if (trimmed.indexOf('__ESCAPED_COMMENT') > -1)
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trimmed = withoutHeadingComments(trimmed, list, context);
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if (trimmed.indexOf('__ESCAPED_COMMENT') > -1)
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trimmed = withoutInnerComments(trimmed, innerComments, context);
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if (trimmed.length === 0) {
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trackComments(innerComments, list, context);
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continue;
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}
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var pos = body.length - 1;
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if (IMPORTANT_WORD_MATCH.test(trimmed) && body[pos][0] == '!') {
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context.track(trimmed);
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body[pos - 1][0] += IMPORTANT_TOKEN;
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body.pop();
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continue;
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}
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if (IMPORTANT_TOKEN_MATCH.test(trimmed) || (IMPORTANT_WORD_MATCH.test(trimmed) && body[pos][0][body[pos][0].length - 1] == '!')) {
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context.track(trimmed);
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body[pos][0] += trimmed;
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continue;
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}
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body.push([trimmed].concat(context.track(value, true)));
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trackComments(innerComments, list, context);
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if (endsWithNonSpaceSeparator) {
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body.push([lastCharacter]);
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context.track(lastCharacter);
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}
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}
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if (i < l - 1)
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context.track(';');
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list.push(body);
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}
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return list;
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}
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module.exports = extractProperties;
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