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/*******************************************************************************
µMatrix - a Chromium browser extension to block requests.
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/uMatrix
*/
/* global vAPI, uDom */
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
var messager = vAPI.messaging.channel('dyna-rules.js');
/******************************************************************************/
// Switches before, rules after
var normalizeRawRules = function(s) {
return s.replace(/[ \t]+/g, ' ')
.split(/\s*\n+\s*/)
.sort(directiveSort)
.join('\n')
.trim();
};
/******************************************************************************/
// This is to give a visual hint that the content of user blacklist has changed.
function rulesChanged() {
uDom('#rulesApply').prop(
'disabled',
normalizeRawRules(uDom('#rulesEditor').val()) === cachedRawRules
);
}
var cachedRawRules = '';
/******************************************************************************/
// Switches before, rules after
var directiveSort = function(a, b) {
var aIsSwitch = a.indexOf(':') !== -1;
var bIsSwitch = b.indexOf(':') !== -1;
if ( aIsSwitch === bIsSwitch ) {
return a.localeCompare(b);
}
return aIsSwitch ? -1 : 1;
};
/******************************************************************************/
var processRules = function(rawRules) {
cachedRawRules = normalizeRawRules(rawRules);
uDom('#rulesEditor').val(cachedRawRules);
};
/******************************************************************************/
var rulesApplyHandler = function() {
var onWritten = function(response) {
processRules(response);
rulesChanged();
};
var request = {
what: 'setDynamicRules',
rawRules: uDom('#rulesEditor').val()
};
messager.send(request, onWritten);
};
/******************************************************************************/
function handleImportFilePicker() {
var fileReaderOnLoadHandler = function() {
if ( typeof this.result !== 'string' || this.result === '' ) {
return;
}
var textarea = uDom('#rulesEditor');
textarea.val([textarea.val(), this.result].join('\n').trim());
rulesChanged();
};
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);
}
/******************************************************************************/
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();
};
/******************************************************************************/
function exportUserRulesToFile() {
var now = new Date();
var filename = vAPI.i18n('rulesDefaultFileName')
.replace('{{datetime}}', now.toLocaleString())
.replace(/ +/g, '_');
vAPI.download({
'url': 'data:text/plain,' + encodeURIComponent(uDom('#rulesEditor').val()),
'filename': filename,
'saveAs': true
});
}
/******************************************************************************/
uDom.onLoad(function() {
// Handle user interaction
uDom('#importButton').on('click', startImportFilePicker);
uDom('#importFilePicker').on('change', handleImportFilePicker);
uDom('#exportButton').on('click', exportUserRulesToFile);
uDom('#rulesEditor').on('input', rulesChanged);
uDom('#rulesApply').on('click', rulesApplyHandler);
messager.send({ what: 'getDynamicRules' }, processRules);
});
/******************************************************************************/
})();
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