* Introduce MacroExpander
The job of the MacroExpander is turning a stream of possibly expandable
tokens, as obtained from the Lexer, into a stream of non-expandable tokens
(in KaTeX, even though they may well be expandable in TeX) which can be
processed by the Parser. The challenge here is that we don't have
mode-specific lexer implementations any more, so we need to do everything on
the token level, including reassembly of sizes and colors.
* Make macros available in development server
Now one can specify macro definitions like \foo=bar as part of the query
string and use these macros in the formula being typeset.
* Add tests for macro expansions
* Handle end of input in special groups
This avoids an infinite loop if input ends prematurely.
* Simplify parseSpecialGroup
The parseSpecialGroup methos now returns a single token spanning the whole
special group, and leaves matching that string against a suitable regular
expression to whoever is calling the method. Suggested by @cbreeden.
* Incorporate review suggestions
Add improvements suggested by Kevin Barabash during review.
* Input range sanity checks
Ensure that both tokens of a token range come from the same lexer,
and that the range has a non-negative length.
* Improved wording of two comments
Summary: This makes typing into the box bearable with break-on-exception enabled.
Test Plan: Typed into box; I didn't blow up.
Reviewers: emily
Reviewed By: emily
Subscribers: jessie
Differential Revision: http://phabricator.khanacademy.org/D13314
Summary: Rename all instances of mjlite -> katex
Test Plan: Run the local server, make sure things still work.
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D2977
Summary:
Uploaded the OTFs from eab3322d to fontsquirrel with the following config:
```
{"mode":"expert","formats":["ttf","woff","eotz"],"tt_instructor":"default","fix_vertical_metrics":"Y","fix_gasp":"xy","add_spaces":"Y","add_hyphens":"Y","fallback":"none","fallback_custom":"100","options_subset":"none","subset_custom":"","subset_custom_range":"","css_stylesheet":"stylesheet.css","filename_suffix":"","emsquare":"2048","spacing_adjustment":"0"}
```
Now we have this beauty in IE8:
{F213}
and it looks similar in Chrome. Now I guess we just need square roots so we can stop disseminating the wrong quadratic formula.
Reviewers: xymostech
Reviewed By: xymostech
Differential Revision: http://phabricator.benalpert.com/D43
