Is there a way to access per-character text properties via script?

The TextDocument object (available via the source text property of a text layer) seems to only provide information about the first character of the text. How can I access properties for other characters?

Also, how can I access the following:

• The paragraph indentation options (indent left, right, first line, etc)?
• The vertical scaling, horizontal scaling, kerning, leading, tsume, baseline shift, and character styles (faux italic/bold, subscript,superscript, small caps, all caps)?

Are these available to scripts at all?

Thanks,

Yair Halevi (Spock)