vim-AutoCenter

When enabled, center the current line automatically.

Usage

:AutoCenterOn: enable AutoCenter.
:AutoCenterOff: disable AutoCenter.

When enabled,

center current line whenever the text is changed except by an undo or redo operation, so it doesn't affect them.
= key acts like its default behavior except that it centers lines instead of indenting them.
<CR> is unmapped for Insert mode in case some existing mapping may affect the centering function.

Dependency

MappingMem plugin. Optional but recommended. Used to restore the mappings overriden or deleted by AutoCenter when you turn it off.