stylus/backup/fileSaveLoad.js
Jeremy Schomery 92d0acfbe3 fixes #11
2017-02-03 12:47:26 +03:30

47 lines
1.7 KiB
JavaScript

var STYLISH_DUMP_FILE_EXT = ".txt";
var STYLISH_DEFAULT_SAVE_NAME = "stylus-mm-dd-yyy" + STYLISH_DUMP_FILE_EXT;
function saveAsFile(text, fileName, dialog) {
fileName = fileName || STYLISH_DEFAULT_SAVE_NAME;
dialog = typeof dialog === "boolean" ? dialog : true;
return new Promise(function(resolve){
var fileContent = 'data:text/plain;charset=utf-8,' + encodeURIComponent(text);
chrome.downloads.download({filename: fileName, saveAs: true, url: fileContent}, resolve)
});
}
/**
* !!works only when page has representation - backgound page won't work
*
* opens open file dialog,
* gets selected file,
* gets it's path,
* gets content of it by ajax
*/
function loadFromFile(formatToFilter){
return new Promise(function(resolve){
var fileInput = document.createElement('input');
fileInput.style = "display: none;";
fileInput.type = "file";
fileInput.accept = formatToFilter || STYLISH_DUMP_FILE_EXT;
fileInput.acceptCharset = "utf8";
document.body.appendChild(fileInput);
fileInput.initialValue = fileInput.value;
fileInput.addEventListener('change', changeHandler);
function changeHandler(){
if (fileInput.value !== fileInput.initialValue){
var fReader = new FileReader();
fReader.onloadend = function (event){
fileInput.removeEventListener('change', changeHandler);
fileInput.remove();
resolve(event.target.result);
};
fReader.readAsText(fileInput.files[0], 'utf-8')
}
}
fileInput.click();
});
}