Summary:
Update the MathJaxFonts `Dockerfile` to enable the use of
`ttfautohint` which hints our fonts better. Also, fix the location that
batik is downloaded from, update some formatting in the `Dockerfile`,
and update the fonts and metrics.
Test Plan:
- Compare a rendered `= - A z 4 \Longrightarrow \Sigma \Biggl(` in
Chrome on Windows at font sizes 10px to 20px before and after this
change.
- See that characters look about the same, or better.
- See that the screenshot tests didn't change in firefox (maybe firefox
runs the same autohinting algorithm that we do?), and don't visually
change in chrome
Reviewers: kevinb, alpert
Reviewed By: kevinb, alpert
Differential Revision: https://phabricator.khanacademy.org/D18977
With a lot of sites using the global box-sizing it breaks the zoom box on large equations when the zoom goes wider than the screen. This fix will explicitly add content-box on this element to prevent a global override.
Escaping TeX in JSON as query strings is a pain: you have to double all the
\\, you have to escape the & and the #, you can't easily include line breaks
for readability, and so on. YAML solves most of these problems for most of
the situations. Now each test case can be structured, while simple test
cases only consist of a line of verbatim TeX code, with no escaping.
The most troublesome items remaining are lines starting in { since in YAML
these would denote inline mapping types. We use block notation for these.
This avoids one of the few requirements we have left: you no longer have to
start a KaTeX development server, the script will do it for you, using a
random port number.
To reproduce the old behaviour, explicitely state --katex-port=7936.
Since the Selenium images are available for download, and downloading them
is usually faster than building them from scratch, this makes taking
screenshots easier. Furthermore, since the Selenium image is not specific
to KaTeX, it could as well be used for other purposes, thus saving space
since a single image can be used in multiple projects.
This change also deals with the non-determinism in the Lap screenshot:
We detect the one known (and accepted) alternate rendering and change the
output file name to Lap_alt in this case. So either Lap or Lap_alt gets
saved to, and if the image is different from both, then one of these files
will show a modification. On the other hand, if it is equal to either of
these, then the matching one will get overwritten, showing no change.
