Running pdfjs inside a Xojo HTMLViewer

Viewing PDFs is a common requirement for desktop applications, but reliance on plug-ins is always tricky in cross-platform environments.

This project integrates the fantastic pdf.js from Mozilla Project to enable rendering and navigation of PDF files within a desktop application with an HTMLViewer.

Behind the scenes, the HTMLViewer is loading each PDF through pdf.js (it's using the default PDFViewer including with the package, but a custom one can easily be prepared as necessary) and a couple of buttons included demonstrate loading different files and calling either a given page or an anchor inside the PDF document.

File "File 1" has an anchor called "appendix-a" Files "File 1" and "File 2" have more than one page, so a specific page can be called and navigated to. File "File 3" is a single page PDF and should ignore the requests for anchors or pages. Below the PDF viewer a quick link should open the corresponding viewer in a web browser (local restrictions may prevent the local web browser from loading)