devextreme
Version:
JavaScript/TypeScript Component Suite for Responsive Web Development
129 lines (128 loc) • 4.83 kB
JavaScript
/**
* DevExtreme (esm/__internal/exporter/file_saver.js)
* Version: 25.2.7
* Build date: Tue May 05 2026
*
* Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import domAdapter from "../../core/dom_adapter";
import {
logger
} from "../../core/utils/console";
import {
isDefined,
isFunction
} from "../../core/utils/type";
import {
getNavigator,
getWindow
} from "../../core/utils/window";
import errors from "../../ui/widget/ui.errors";
const window = getWindow();
const navigator = getNavigator();
const FILE_EXTESIONS = {
EXCEL: "xlsx",
CSS: "css",
PNG: "png",
JPEG: "jpeg",
GIF: "gif",
SVG: "svg",
PDF: "pdf"
};
export const MIME_TYPES = {
CSS: "text/css",
EXCEL: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
PNG: "image/png",
JPEG: "image/jpeg",
GIF: "image/gif",
SVG: "image/svg+xml",
PDF: "application/pdf"
};
export const fileSaver = {
_revokeObjectURLTimeout: 3e4,
_getDataUri(format, data) {
const mimeType = this._getMimeType(format);
return `data:${mimeType};base64,${data}`
},
_getMimeType: format => MIME_TYPES[format] || "application/octet-stream",
_linkDownloader(fileName, href) {
const exportLinkElement = domAdapter.createElement("a");
exportLinkElement.download = fileName;
exportLinkElement.href = href;
exportLinkElement.target = "_blank";
return exportLinkElement
},
_winJSBlobSave(blob, fileName, format) {
const savePicker = new Windows.Storage.Pickers.FileSavePicker;
savePicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;
const fileExtension = FILE_EXTESIONS[format];
if (fileExtension) {
const mimeType = this._getMimeType(format);
savePicker.fileTypeChoices.insert(mimeType, [`.${fileExtension}`])
}
savePicker.suggestedFileName = fileName;
savePicker.pickSaveFileAsync().then(file => {
if (file) {
file.openAsync(Windows.Storage.FileAccessMode.readWrite).then(outputStream => {
const inputStream = blob.msDetachStream();
Windows.Storage.Streams.RandomAccessStream.copyAsync(inputStream, outputStream).then(() => {
outputStream.flushAsync().done(() => {
inputStream.close();
outputStream.close()
})
})
})
}
})
},
_click(link) {
try {
link.dispatchEvent(new MouseEvent("click", {
cancelable: true
}))
} catch (e) {
const event = domAdapter.getDocument().createEvent("MouseEvents");
event.initMouseEvent("click", true, true, window, 0, 0, 0, 80, 20, false, false, false, false, 0, null);
link.dispatchEvent(event)
}
},
_saveBlobAs(fileName, format, data) {
this._blobSaved = false;
if (isDefined(navigator.msSaveOrOpenBlob)) {
navigator.msSaveOrOpenBlob(data, fileName);
this._blobSaved = true
} else if (isDefined(window.WinJS)) {
this._winJSBlobSave(data, fileName, format);
this._blobSaved = true
} else {
const URL = window.URL || window.webkitURL || window.mozURL || window.msURL || window.oURL;
if (isDefined(URL)) {
const objectURL = URL.createObjectURL(data);
const downloadLink = this._linkDownloader(fileName, objectURL);
setTimeout(() => {
URL.revokeObjectURL(objectURL);
this._objectUrlRevoked = true
}, this._revokeObjectURLTimeout);
this._click(downloadLink)
} else {
logger.warn("window.URL || window.webkitURL || window.mozURL || window.msURL || window.oURL is not defined")
}
}
},
saveAs(fileName, format, data) {
const fileExtension = FILE_EXTESIONS[format];
if (fileExtension) {
fileName += `.${fileExtension}`
}
if (isFunction(window.Blob)) {
this._saveBlobAs(fileName, format, data)
} else {
if (!isDefined(/iPad/i.exec(navigator.userAgent))) {
errors.log("E1034")
}
const downloadLink = this._linkDownloader(fileName, this._getDataUri(format, data));
this._click(downloadLink)
}
}
};