click inspirations
===================

- Editor: https://github.com/mitsuhiko/click/blob/master/click/_termui_impl.py#L311
- Types: https://github.com/mitsuhiko/click/blob/master/click/types.py

Multiwindow
===========

cmdutils.register (and thus Command) gets argument scope which is global/window

when scope=global, instance is searched starting with the application
singleton.

when scope=window, instance is searched starting with the window the command
was executed in.

Each window has its own CommandDispatcher, which adds the window as an
attribute to every Command before calling the handler. The handler then uses
this to get the starting point for instance=.


IPC
===

We use QLocalSocket to communicate with another instance
TODO: find out why many apps just use QLocalSocket as a control channel, and
shared memory for data.
Max data size might be 8k, but this is enough for commandline args.

http://developer.nokia.com/community/wiki/Qt_IPC_using_QLocalSocket_%26_QLocalServer
https://www.mail-archive.com/pyqt@riverbankcomputing.com/msg22736.html
http://stackoverflow.com/a/8795563/2085149
http://nullege.com/codes/show/src%40n%40i%40ninja-ide2-2.1.1%40ninja_ide%40core%40ipc.py/20/PyQt4.QtNetwork.QLocalSocket/python
http://nullege.com/codes/show/src%40t%40a%40taurus-3.0.0%40lib%40taurus%40qt%40qtgui%40container%40taurusmainwindow.py/780/PyQt4.QtNetwork.QLocalSocket/python
http://nullege.com/codes/show/src%40h%40e%40Heliotrope-HEAD%40purple_server.py/95/PyQt4.QtNetwork.QLocalSocket/python


Netscape cookies
================

http://www.cookiecentral.com/faq/#3.5
https://docs.python.org/3.4/library/http.cookies.html
http://qt-project.org/doc/qt-4.8/qnetworkcookie.html
- Second column (flag): TRUE if domain starts with ., else FALSE
- if a cookie is a http-only cookie domain is prepended with a #HttpOnly_
- Python's http.cookiejar.MozillaCookieJar might help



Caching
=======

QNetworkManager.setCache() and use a QNetworkDiskCache probably


Element selection detection
===========================

Possible options:
- javascript: http://stackoverflow.com/a/2848120/2085149
- microFocusChanged and check active element via:
    frame = page.currentFrame()
    elem = frame.findFirstElement('*:focus')


Completion view (not QTreeView)
===============================

Perhaps using a QHBoxLayout of QTableViews and creating/destroying them based
on the completion would be a better idea?


Shutdown
========

Some pointers:
  https://code.google.com/p/webscraping/source/browse/webkit.py
  Simply does setPage(None) in __del__ of webview.

  http://www.tenox.net/out/wrp11-qt.py
  does del self._window; del self._view; del self._page

  http://pydoc.net/Python/grab/0.4.5/ghost.ghost/
  does webview.close(); del self.manager; del self.page; del self.mainframe