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Support for top-level \newline and \\ in inline math (#1298)

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* Support for top-level \newline and \\ in inline math

This was a little tricky because `\\` was defined as an endOfExpression.
Instead made `\\` a termination specific to an array environment.
Outside an array environment, buildHTML handles the `cr` object,
resulting in a `.newline` class.  Currently this turns into a
`display: block` (with appropriate vertical spacing) only in inline math,
matching LaTeX.

* Simplify code

* Fix Jest errors

* NewLine screenshot test

* Bug fix: \\ only works at top level of inline

* Add \newline and \cr to test

* Switch test to pmatrix

* Add vertical space test

* Add \\ vs. \newline tests

* Fix flow errors

* Add \cr test

* Add documentation for \\ at top level

* Comment out newRow

* Fix commenting out
This commit is contained in:
Erik Demaine
2018-05-13 09:58:24 -04:00
committed by GitHub
parent bb1dc0c431
commit 4801ab875a
15 changed files with 116 additions and 23 deletions
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12
test/katex-spec.js
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@@ -3126,6 +3126,18 @@ describe("The \\mathchoice function", function() {
});
});
describe("Newlines via \\\\ and \\newline", function() {
it("should build \\\\ and \\newline the same", () => {
expect("hello \\\\ world").toBuildLike("hello \\newline world");
expect("hello \\\\[1ex] world").toBuildLike(
"hello \\newline[1ex] world");
});
it("should not allow \\cr at top level", () => {
expect("hello \\cr world").toNotParse();
});
});
describe("Symbols", function() {
it("should parse \\text{\\i\\j}", () => {
expect("\\text{\\i\\j}").toBuild();