Forcing SSL and WWW using .htaccess

That's a bit simpler.

RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} !^www\.domain\.com$ [NC]
RewriteRule ^(.*)$ https://www.domain.com/$1 [L,R=301]

Use this:

RewriteEngine on

# Force www: from http://stackoverflow.com/a/4958847/1078583
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

# Force SSL: From http://stackoverflow.com/q/24322035/
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=302,L,NE]