Summary:
Add \displaystyle, \textstyle, \scriptstyle, and \scriptscriptstyle commands.
Added tests and huxley screenshots for everything that looks different in
displaystyle vs normal style.
Fixes#24.
Test Plan:
- See new tests work, and old tests still work
- See no huxley screenshots changed, and new screenshot looks good
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D13079
Summary:
Rewrote the parser to make this work, and added a bunch of tests to make sure
this does work. In the process, refactored all of our functions into a separate
file, functions.js. Added a bunch of comments to Parser.js. Also, update jasmine
so we can make our tests better, and add a lint_blacklist.txt to not lint bad
jasmine stuff.
Fixes#10Fixes#12
Test Plan:
- Make sure all of the tests still work, and all of the new ones work also
- Make sure huxley screenshots didn't change
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D12989
Summary:
Follow the TeXbook instructions on how to construct square roots. Using
makeCustomSizedDelim, this becomes nearly trivial.
Test Plan:
- Make sure normal tests work
- Make sure the new huxley test looks good, and other huxley tests haven't changed.
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D12918
Summary:
Added stacked delimiter support for more delimiters. Split out delimiter
functions into its own file, and split out some tree building functions into a
common file. Supports the empty `.` delimiter with \left and \right, and doesn't
try to produce huge /, \backslash, <, or > delimiters. Depends on D7844
Test input:
\left( \left) \left[ \left\lbrack \left] \left\rbrack \left\{ \left\lbrace
\left\} \left\rbrace \left\lfloor \left\rfloor \left\lceil \left\rceil
\left\langle \left\rangle \left/ \left\backslash \left| \left\vert \left\|
\left\Vert \left\uparrow \left\Uparrow \left\downarrow \left\Downarrow
\left\updownarrow \left\Updownarrow {x^{x^{x^{x^{x^{x^{x^{x^{x^{x^x}}}}}}}}}}
\right.\right.\right.\right.\right.\right.\right.\right.\right.\right.
\right.\right.\right.\right.\right.\right.\right.\right.\right.\right.
\right.\right.\right.\right.\right.\right.\right.\right.
Test Plan:
- Run the test input, see that it works
- Run the tests, see that they work
- Look at huxley screenshots (not here yet :( ) and make sure they look good
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D11602
Summary:
Supports the 'ex' and 'em' units for sizes. Doesn't support the optional depth
argument.
Test Plan:
- See that the huxley test looks good, and nothing else changed
- See that the tests pass
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D12777
Summary:
Follow the instructions in the TeX book for drawing \overlines. This uses the
same code as fractions to produce the bars. Also added the ability to cramp
styles (i.e. T -> T' and T' -> T').
Test Plan:
- Look at `\overline{x}`, `\overline{\dfrac{x}{y}+z}`, and
`\blue{\overline{x}}` to make sure they look good.
- Make sure the tests work
- Make sure the huxley tests look good (Not here yet :( )
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D11604
Summary:
Make delimiter sizing work. This involved
- Adding the symbols for the remaining delimiters (like `\lfloor` and `\{`)
- Adding metrics for the size1, size2, size3, and size4 fonts
- Parsing delimiter sizing functions
- Using the big fonts when possible, otherwise building large copies of the
delimiters from scratch
Test Plan:
- See that
`\bigl\uparrow\Bigl\downarrow\biggl\updownarrow\Biggl\Uparrow
\Biggr\Downarrow\biggr\Updownarrow\bigm/\Bigm\backslash\biggm|
\Biggm|\big\lceil\Big\rceil\bigg\langle\Bigg\rangle\bigl(\Bigl)
\biggl[\Biggl]\Biggr\{\biggr\}\Bigr\lfloor\bigr\rfloor`
parses correctly (this contains all of the delimiters, and all of the sizing
modes)
- See that the huxley tests didn't change, and the new one looks good
- See the normal tests work
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D7844
Summary:
Implicit groups are objects that act like groups but don't have brackets around
them. This is used for things like sizing functions or font-change functions
that can occur in the middle of the group, but act like they apply to a group
after them which stops when the current group stops. E.g. `Hello {world \Large
hello} world` produces normal, normal, Large, normal text. (Note, I just came up
with the name implicit group, I don't think this is actually how it is parsed in
LaTeX but it fits nicely with the current parsing scheme and seems to work
well).
For now, apply this to the sizing functions (we don't have any other functions
that act like this). Also note that this doesn't really do much practically
because we limit sizing functions to only be on the top level of the expression,
but it does let people do `\Large x` and get a large `x`, without having to add
braces.
Test Plan:
- Run the tests, see they work
- Make sure `abc \Large abc` looks correct
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D10876
Summary:
In something like `\text {hello, world}` we want to ignore the first space but not the second. This suggests to me that perhaps we shouldn't be in text-lexing mode until we actually see the first curly brace, so this changes us to do that.
Note that this disallows doing unbraced text things now; it seemed nontrivial to lex a single text character while ignoring spaces. We should probably fix it sometime, but for now we'll fall back to MathJax anyway so I'm not super concerned.
We should also add a huxley test for this.
Test Plan: `\text {2x 2}` rendered `2x 2` in a non-italic font.
Reviewers: jack, emily
Reviewed By: emily
Differential Revision: http://phabricator.khanacademy.org/D9376
Summary:
Add real support for the tie symbol. Also, get rid of any of the
leftover bad support
Test Plan:
- See the new normal tests succeed
- See huxley tests didn't change except the new ones, which looks good
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D7772
Summary:
Keep track of the color inside the style now, and use that when we are
rendering things. Added a custom lexing mode to handle lexing colors correctly.
Prefixed the old katex colors (internally) with "katex-" to distinguish them
from CSS colors.
Test Plan:
- Run the normal tests, see they work
- Run the huxley tests, see that they didn't change except for the color one
which looks right
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D7763
Summary:
Make all of the parsing functions keep track of whether they are
parsing in math mode or text mode. Then, add a separate lexing function to lex
text mode, which is different than the normal mode because it does weird things
with spacing and allows a different set of characters.
Test Plan:
- See that the normal tests work
- See that the huxley screenshot looks reasonable
- See that none of the other huxley screenshots changed
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D7578
Summary:
Remove a single `vertical-align: top`, and somewhow it now works. May
the gods of CSS have mercy on us. Also added some tests.
Test Plan:
- See that the huxley tests don't have any changes
- See that the new huxley screenshots look reasonable
- Run the normal tests and see that they work
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D7494
Summary:
This diff does a couple different things:
- There is now a metrics/ folder, which contains the property files describing
the metrics if the fonts, as well as a script for reading and printing the
metrics in javascript.
- Fractions and superscripts/subscripts are now rendered in slightly different
ways now (notably, no use of inline-table). This allows for much more precise
positioning of the superscripts, subscripts, numerators, and denominators,
while still having an appropriate baseline. Also, there is no longer a
sup/sub/supsub distinction, there are only supsubs with null sup/sub.
- Using the new font metrics and by implementing the formulas found in The TeX
Book, Appendix G, the heights and depths of all of the sub-expressions in a
formula are now calculated. These are currently used to:
- Correctly position superscripts, subscripts, numerators, and denominators
- Adjust the height and depth of the overall expression so it takes up the
appropriate space
- Because we have to add attributes (height and depth) to every attribute, I
have changed the way DOM nodes are assembled. Now, instead of assembling the
DOM elements inline (which is a problem because we need to track
height/depth, and we shouldn't (and can't in IE 8) attach raw attributes to DOM
nodes), we assemble a pseudo-DOM structure with the extra information, and
then actually assemble it at the very end.
The main page also now has an updated expression to show off and test the new
and improved parsing.
Test Plan:
View the main page, make sure that the expression renders. Make sure
that the tests pass. Make sure that expressions have the correct calculated
height (this is most easily tested by viewing them on the main page and making
sure that the top of the expression lines up with the bottom of the input box).
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D3442
Summary:
Add the ability to parse lone `^x` and `_y`, etc. This basically just
involves more checking of cases in the increasingly ugly `parseAtom` function.
Also, now we manually check for the cases of double superscripts and
subscripts.
Test Plan: Make sure the tests pass. Make sure things like `^x` and `_y` parse.
Reviewers: emily
Reviewed By: emily
Differential Revision: http://phabricator.khanacademy.org/D3095
Summary: Allow there to be letters immediately after \ , \;, \,, \:.
Test Plan: Run the tests
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D3031
Summary:
Make our own parser that doesn't use jison, so that we can handle
funny TeX syntax, and to make it smaller.
Test Plan: Make sure the tests pass with the new parser.
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D3029
Summary:
Make some tests that test the parser. So far, there are no DOM tests,
but maybe later.
Test Plan:
Run `make serve` and then visit `/test/test.html`. Make sure all the
tests pass.
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D2987
