mirror of
https://github.com/ManchildProductions/binoc-central-mirror.git
synced 2026-06-11 21:39:00 +00:00
Matt A. Tobin
100 lines
3.7 KiB
JavaScript
100 lines
3.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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this.EXPORTED_SYMBOLS = ["GetAttachmentKeywords"];
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/**
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* Check whether the character is a CJK character or not.
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*
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* @return true if it is a CJK character.
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*/
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function IsCJK(code)
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{
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if (code >= 0x2000 && code <= 0x9fff) {
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// Hiragana, Katakana and Kanaji
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return true;
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}
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else if (code >= 0xac00 && code <= 0xd7ff) {
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// Hangul
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return true;
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}
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else if (code >= 0xf900 && code <= 0xffff) {
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// Hiragana, Katakana and Kanaji
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return true;
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}
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return false;
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}
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/**
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* Get the (possibly-empty) list of attachment keywords in this message.
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*
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* @return the (possibly-empty) list of attachment keywords in this message
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**/
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function GetAttachmentKeywords(mailData,keywordsInCsv)
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{
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// The empty string would get split to an array of size 1. Avoid that...
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var keywordsArray = (keywordsInCsv) ? keywordsInCsv.split(",") : [];
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function escapeRegxpSpecials(inputString)
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{
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const specials = [".", "\\", "^", "$", "*", "+", "?", "|",
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"(", ")" , "[", "]", "{", "}"];
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var re = new RegExp("(\\"+specials.join("|\\")+")", "g");
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inputString = inputString.replace(re, "\\$1");
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return inputString.replace(" ", "\\s+");
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}
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// NOT_W is the character class that isn't in the Unicode classes "Ll",
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// "Lu" and "Lt". It should work like \W, if \W knew about Unicode.
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const NOT_W = "[^\\u0041-\\u005a\\u0061-\\u007a\\u00aa\\u00b5\\u00ba\\u00c0-\\u00d6\\u00d8-\\u00f6\\u00f8-\\u01ba\\u01bc-\\u01bf\\u01c4-\\u02ad\\u0386\\u0388-\\u0481\\u048c-\\u0556\\u0561-\\u0587\\u10a0-\\u10c5\\u1e00-\\u1fbc\\u1fbe\\u1fc2-\\u1fcc\\u1fd0-\\u1fdb\\u1fe0-\\u1fec\\u1ff2-\\u1ffc\\u207f\\u2102\\u2107\\u210a-\\u2113\\u2115\\u2119-\\u211d\\u2124\\u2126\\u2128\\u212a-\\u212d\\u212f-\\u2131\\u2133\\u2134\\u2139\\ufb00-\\ufb17\\uff21-\\uff3a\\uff41-\\uff5a]";
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var keywordsFound = [];
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for (var i = 0; i < keywordsArray.length; i++) {
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var kw = escapeRegxpSpecials(keywordsArray[i]);
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// If the keyword starts (ends) with a CJK character, we don't care
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// what the previous (next) character is, because the words aren't
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// space delimited.
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if (keywordsArray[i].charAt(0) == ".") { // like .pdf
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// For this case we want to match the whole document name.
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var start = "(([^\\s]*)\\b)";
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var end = IsCJK(kw.charCodeAt(kw.length - 1)) ? "" : "(\\s|$)";
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var re = new RegExp(start + kw + end, "ig");
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var matching = mailData.match(re);
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if (matching) {
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for (var j = 0; j < matching.length; j++) {
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// Ignore the match if it was in a URL.
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if (!(/^(https?|ftp):\/\//i.test(matching[j]))) {
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// We can have several *different* matches for one dot-keyword.
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// E.g. foo.pdf and bar.pdf would both match for .pdf.
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var m = matching[j].trim();
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if (!keywordsFound.includes(m))
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keywordsFound.push(m);
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}
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}
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}
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}
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else {
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var start = IsCJK(kw.charCodeAt(0)) ? "" : ("((^|\\s)\\S*)");
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var end = IsCJK(kw.charCodeAt(kw.length - 1)) ? "" : "(" + NOT_W + "|$)";
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var re = new RegExp(start + kw + end, "ig");
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var matching;
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while ((matching = re.exec(mailData)) !== null) {
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// Ignore the match if it was in a URL.
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if (!(/^(https?|ftp):\/\//i.test(matching[0].trim()))) {
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keywordsFound.push(keywordsArray[i]);
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break;
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}
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}
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}
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}
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return keywordsFound;
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}
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var onmessage = function(event)
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{
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var keywordsFound = GetAttachmentKeywords(event.data[0], event.data[1]);
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postMessage(keywordsFound);
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};
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