uBlock/src/js/1p-filters.js

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/*******************************************************************************
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µBlock - a browser extension to block requests.
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Copyright (C) 2014 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global vAPI, uDom */
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/******************************************************************************/
(function() {
'use strict';
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/******************************************************************************/
var cachedUserFilters = '';
/******************************************************************************/
var messager = vAPI.messaging.channel('1p-filters.js');
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/******************************************************************************/
// This is to give a visual hint that the content of user blacklist has changed.
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function userFiltersChanged() {
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uDom('#userFiltersApply').prop(
'disabled',
uDom('#userFilters').val().trim() === cachedUserFilters
);
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}
/******************************************************************************/
function renderUserFilters() {
var onRead = function(details) {
if ( details.error ) {
return;
}
cachedUserFilters = details.content.trim();
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uDom('#userFilters').val(details.content);
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};
messager.send({ what: 'readUserFilters' }, onRead);
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}
/******************************************************************************/
function allFiltersApplyHandler() {
messager.send({ what: 'reloadAllFilters' });
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uDom('#userFiltersApply').prop('disabled', true );
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}
/******************************************************************************/
var handleImportFilePicker = function() {
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// https://github.com/gorhill/uBlock/issues/1004
// Support extraction of filters from ABP backup file
var abpImporter = function(s) {
var reAbpExtractor = /\n\[Subscription\]\n+url=~[\x08-\x7E]+?\[Subscription filters\]([\x08-\x7E]*?)(?:\[Subscription\]|$)/ig;
var matches = reAbpExtractor.exec(s);
// Not an ABP backup file
if ( matches === null ) {
return s;
}
var out = [];
while ( matches !== null ) {
if ( matches.length !== 2 ) {
continue;
}
out.push(matches[1].trim().replace(/\\\[/g, '['));
matches = reAbpExtractor.exec(s);
}
return out.join('\n');
};
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var fileReaderOnLoadHandler = function() {
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var sanitized = abpImporter(this.result);
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var textarea = uDom('#userFilters');
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textarea.val(textarea.val().trim() + '\n' + sanitized);
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userFiltersChanged();
};
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var file = this.files[0];
if ( file === undefined || file.name === '' ) {
return;
}
if ( file.type.indexOf('text') !== 0 ) {
return;
}
var fr = new FileReader();
fr.onload = fileReaderOnLoadHandler;
fr.readAsText(file);
};
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/******************************************************************************/
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var startImportFilePicker = function() {
var input = document.getElementById('importFilePicker');
// Reset to empty string, this will ensure an change event is properly
// triggered if the user pick a file, even if it is the same as the last
// one picked.
input.value = '';
input.click();
};
/******************************************************************************/
var exportUserFiltersToFile = function() {
var val = uDom('#userFilters').val().trim();
if ( val === '' ) {
return;
}
var now = new Date();
var filename = vAPI.i18n('1pExportFilename')
.replace('{{datetime}}', now.toLocaleString())
.replace(/ +/g, '_');
vAPI.download({
'url': 'data:text/plain;charset=utf-8,' + encodeURIComponent(val),
'filename': filename
});
};
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/******************************************************************************/
var userFiltersApplyHandler = function() {
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var onWritten = function(details) {
if ( details.error ) {
return;
}
cachedUserFilters = details.content.trim();
userFiltersChanged();
allFiltersApplyHandler();
};
var request = {
what: 'writeUserFilters',
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content: uDom('#userFilters').val()
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};
messager.send(request, onWritten);
};
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/******************************************************************************/
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uDom.onLoad(function() {
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// Handle user interaction
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uDom('#importUserFiltersFromFile').on('click', startImportFilePicker);
uDom('#importFilePicker').on('change', handleImportFilePicker);
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uDom('#exportUserFiltersToFile').on('click', exportUserFiltersToFile);
uDom('#userFilters').on('input', userFiltersChanged);
uDom('#userFiltersApply').on('click', userFiltersApplyHandler);
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renderUserFilters();
});
/******************************************************************************/
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// https://www.youtube.com/watch?v=UNilsLf6eW4
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})();