Support \widehat

[digitalheir]

Like \hat, but wide:

left: \hat, right: \widehat

[kevinbarabash]

We'll have to grab additional glyphs for wide accents. Having width metrics would help with this but we could fake it by counting the number of characters inside the \widehat.

[jraimbau]

There are a series of similar commands, with other symbols, that should probably be dealt together with \widehat, e.g. \widetilde (for the tilda), \overrightarrow and \overleftarrow (for the arrows).

[Sukii]

Yes, it is more like \overbrace{asdfghjkl} which works fine in MathJax (there you have something to start with).
Even in classical LaTeX or MathJax the \widehat doesn't work that well, see:
http://tex.stackexchange.com/questions/100574/really-wide-hat-symbol

[kevinbarabash]

This was added in v0.8.0.