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76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
6 years ago
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var EscapeStore = require('./escape-store');
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var reduceUrls = require('../urls/reduce');
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var lineBreak = require('os').EOL;
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function UrlsProcessor(context, saveWaypoints, keepUrlQuotes) {
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this.urls = new EscapeStore('URL');
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this.context = context;
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this.saveWaypoints = saveWaypoints;
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this.keepUrlQuotes = keepUrlQuotes;
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}
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// Strip urls by replacing them by a special
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// marker for further restoring. It's done via string scanning
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// instead of regexps to speed up the process.
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UrlsProcessor.prototype.escape = function (data) {
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var breaksCount;
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var lastBreakAt;
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var indent;
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var saveWaypoints = this.saveWaypoints;
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var self = this;
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return reduceUrls(data, this.context, function (url, tempData) {
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if (saveWaypoints) {
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breaksCount = url.split(lineBreak).length - 1;
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lastBreakAt = url.lastIndexOf(lineBreak);
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indent = lastBreakAt > 0 ?
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url.substring(lastBreakAt + lineBreak.length).length :
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url.length;
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}
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var placeholder = self.urls.store(url, saveWaypoints ? [breaksCount, indent] : null);
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tempData.push(placeholder);
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});
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};
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function normalize(url, keepUrlQuotes) {
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url = url
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.replace(/^url/gi, 'url')
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.replace(/\\?\n|\\?\r\n/g, '')
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.replace(/(\s{2,}|\s)/g, ' ')
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.replace(/^url\((['"])? /, 'url($1')
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.replace(/ (['"])?\)$/, '$1)');
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if (/url\(".*'.*"\)/.test(url) || /url\('.*".*'\)/.test(url))
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return url;
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if (!keepUrlQuotes && !/^['"].+['"]$/.test(url) && !/url\(.*[\s\(\)].*\)/.test(url) && !/url\(['"]data:[^;]+;charset/.test(url))
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url = url.replace(/["']/g, '');
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return url;
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}
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UrlsProcessor.prototype.restore = function (data) {
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var tempData = [];
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var cursor = 0;
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for (; cursor < data.length;) {
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var nextMatch = this.urls.nextMatch(data, cursor);
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if (nextMatch.start < 0)
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break;
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tempData.push(data.substring(cursor, nextMatch.start));
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var url = normalize(this.urls.restore(nextMatch.match), this.keepUrlQuotes);
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tempData.push(url);
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cursor = nextMatch.end;
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}
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return tempData.length > 0 ?
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tempData.join('') + data.substring(cursor, data.length) :
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data;
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};
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module.exports = UrlsProcessor;
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