Ability to use data URLs to display locally generated PDFs

[tgreiser]

Example, use pdfMake.js to generate PDFs, and stream them to the viewer window. This appears to bypass the cross-platform issues involved with using file URLs. Tested on Windows 10.

In renderer thread, generate a PDF and send the data URL via IPC
    const {ipcRenderer} = require('electron');
    pdfMake.create(pdf).getDataUrl(function(result) {
        ipcRenderer.send('asynchronous-message', result);
    });

In main thread, works as normal:
    var pdfWindow = null;
    const {ipcMain} = require('electron')
    ipcMain.on('asynchronous-message', (event, url) => {
        pdfWindow = new PDFWindow({
            width: 1024,
            height: 768,
          });
        log.info('Opening a PDFWindow');
        pdfWindow.loadURL(url);
    });

[Brainbusted]

Hi, still getting a save dialog box. any advice?