## Todo list
* Core: support upper char event.
* Browser: implement js plugin like vimium
* Browser: study more code from https://github.com/LavaPower/Browthon-Old/blob/c25d5721b40e95131a3c521566a18467f13ecbf0/files/Browthon_elements.py
* ImageViewer: add zoom support
* Pdfviewer: hover mouse to detect url postion, ctrl + button can open url under mouse.
* Pdfviewer: open link like vimium.
* PdfViewer: use mupdf/page.searchFor implement search text in pdf.
* PdfViewer: split window first, then scroll event cause view blank
* PdfViewer: allow select text.
* Terminal: https://github.com/hrngultekin/pyqtermwidget5 looks good enough
* CHMViewer: develop a chm viewer in emacs.
* Maybe i can study key-process from https://github.com/tarsius/keycast ?

### Mac version
* Figure out mirror render technology from Mac's camera application.
* Use Mac swift instead Qt develop application extension.
* Use socket instead DBus as multi-process IPC
* How to do X11 reparent in Mac?