1 files changed, 40 insertions, 0 deletions
diff --git a/webapp/non_npm_dependencies/katex/src/buildTree.js b/webapp/non_npm_dependencies/katex/src/buildTree.js
new file mode 100644
index 000000000..4a8c2aeda
--- /dev/null
+++ b/webapp/non_npm_dependencies/katex/src/buildTree.js
@@ -0,0 +1,40 @@
+var buildHTML = require("./buildHTML");
+var buildMathML = require("./buildMathML");
+var buildCommon = require("./buildCommon");
+var Options = require("./Options");
+var Settings = require("./Settings");
+var Style = require("./Style");
+
+var makeSpan = buildCommon.makeSpan;
+
+var buildTree = function(tree, expression, settings) {
+    settings = settings || new Settings({});
+
+    var startStyle = Style.TEXT;
+    if (settings.displayMode) {
+        startStyle = Style.DISPLAY;
+    }
+
+    // Setup the default options
+    var options = new Options({
+        style: startStyle,
+        size: "size5",
+    });
+
+    // `buildHTML` sometimes messes with the parse tree (like turning bins ->
+    // ords), so we build the MathML version first.
+    var mathMLNode = buildMathML(tree, expression, options);
+    var htmlNode = buildHTML(tree, options);
+
+    var katexNode = makeSpan(["katex"], [
+        mathMLNode, htmlNode,
+    ]);
+
+    if (settings.displayMode) {
+        return makeSpan(["katex-display"], [katexNode]);
+    } else {
+        return katexNode;
+    }
+};
+
+module.exports = buildTree;