Class PhutilRemarkupBlockStorage

Remarkup prevents several classes of text-processing problems by replacing tokens in the text as they are marked up. For example, if you write something like this:

//D12//

It is processed in several stages. First the "D12" matches and is replaced:

//\11Z//

Now the italics match and are replaced:

\12Z

When processing completes, all the tokens are replaced again in reverse order:

<em>\11Z</em>

Then:

<em><a href="http://...">...</a></em>

If we didn't do this, the italics rule could match the "//" in "http://", or any other number of processing mistakes could occur, some of which create security risks.

This class generates keys, and stores the map of keys to replacement text.