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nuTensor/src/js/user-rules.js

130 lines
4.1 KiB
JavaScript

/*******************************************************************************
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 chrome, messaging, uDom */
/******************************************************************************/
(function() {
/******************************************************************************/
var cachedUserRules = '';
/******************************************************************************/
messaging.start('user-rules.js');
/******************************************************************************/
// This is to give a visual hint that the content of user blacklist has changed.
function userRulesChanged() {
uDom('#userRulesApply').prop(
'disabled',
uDom('#userRules').val().trim() === cachedUserRules
);
}
/******************************************************************************/
function renderUserRules() {
var rulesRead = function(response) {
cachedUserRules = response;
uDom('#userRules').val(response);
};
messaging.ask({ what: 'getUserRules' }, rulesRead);
}
/******************************************************************************/
function handleImportFilePicker() {
var fileReaderOnLoadHandler = function() {
var textarea = uDom('#userRules');
textarea.val([textarea.val(), this.result].join('\n').trim());
userRulesChanged();
};
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() {
chrome.downloads.download({
'url': 'data:text/plain,' + encodeURIComponent(uDom('#userRules').val()),
'filename': chrome.i18n.getMessage('userRulesDefaultFileName'),
'saveAs': true
});
}
/******************************************************************************/
function userRulesApplyHandler() {
var rules = uDom('#userRules').val();
var rulesWritten = function(response) {
cachedUserRules = rules;
userRulesChanged();
};
var request = {
what: 'setUserRules',
rules: rules
};
messaging.ask(request, rulesWritten);
}
/******************************************************************************/
uDom.onLoad(function() {
// Handle user interaction
uDom('#importUserRulesFromFile').on('click', startImportFilePicker);
uDom('#importFilePicker').on('change', handleImportFilePicker);
uDom('#exportUserRulesToFile').on('click', exportUserRulesToFile);
uDom('#userRules').on('input', userRulesChanged);
uDom('#userRulesApply').on('click', userRulesApplyHandler);
renderUserRules();
});
/******************************************************************************/
})();