forked from zhurui/management
99 lines
2.9 KiB
JavaScript
99 lines
2.9 KiB
JavaScript
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var EscapeStore = require('./escape-store');
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var QuoteScanner = require('../utils/quote-scanner');
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var lineBreak = require('os').EOL;
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function FreeTextProcessor(saveWaypoints) {
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this.matches = new EscapeStore('FREE_TEXT');
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this.saveWaypoints = saveWaypoints;
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}
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// Strip content tags by replacing them by the 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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FreeTextProcessor.prototype.escape = function (data) {
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var self = this;
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var breaksCount;
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var lastBreakAt;
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var indent;
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var metadata;
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var saveWaypoints = this.saveWaypoints;
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return new QuoteScanner(data).each(function (match, store) {
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if (saveWaypoints) {
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breaksCount = match.split(lineBreak).length - 1;
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lastBreakAt = match.lastIndexOf(lineBreak);
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indent = lastBreakAt > 0 ?
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match.substring(lastBreakAt + lineBreak.length).length :
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match.length;
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metadata = [breaksCount, indent];
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}
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var placeholder = self.matches.store(match, metadata);
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store.push(placeholder);
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});
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};
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function normalize(text, data, prefixContext, cursor) {
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// FIXME: this is even a bigger hack now - see #407
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var searchIn = data;
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if (prefixContext) {
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searchIn = prefixContext + data.substring(0, data.indexOf('__ESCAPED_FREE_TEXT_CLEAN_CSS'));
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cursor = searchIn.length;
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}
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var lastSemicolon = searchIn.lastIndexOf(';', cursor);
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var lastOpenBrace = searchIn.lastIndexOf('{', cursor);
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var lastOne = 0;
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if (lastSemicolon > -1 && lastOpenBrace > -1)
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lastOne = Math.max(lastSemicolon, lastOpenBrace);
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else if (lastSemicolon == -1)
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lastOne = lastOpenBrace;
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else
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lastOne = lastSemicolon;
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var context = searchIn.substring(lastOne + 1, cursor);
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if (/\[[\w\d\-]+[\*\|\~\^\$]?=$/.test(context)) {
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text = text
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.replace(/\\\n|\\\r\n/g, '')
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.replace(/\n|\r\n/g, '');
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}
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if (/^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/.test(text) && !/format\($/.test(context)) {
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var isFont = /^(font|font\-family):/.test(context);
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var isAttribute = /\[[\w\d\-]+[\*\|\~\^\$]?=$/.test(context);
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var isKeyframe = /@(-moz-|-o-|-webkit-)?keyframes /.test(context);
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var isAnimation = /^(-moz-|-o-|-webkit-)?animation(-name)?:/.test(context);
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if (isFont || isAttribute || isKeyframe || isAnimation)
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text = text.substring(1, text.length - 1);
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}
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return text;
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}
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FreeTextProcessor.prototype.restore = function (data, prefixContext) {
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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.matches.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 text = normalize(this.matches.restore(nextMatch.match), data, prefixContext, nextMatch.start);
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tempData.push(text);
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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 = FreeTextProcessor;
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