Commit node_modules

paige/node_modules/katex/src/functions/accentunder.js

@@ -0,0 +1,60 @@
+// @flow
+// Horizontal overlap functions
+import defineFunction from "../defineFunction";
+import buildCommon from "../buildCommon";
+import mathMLTree from "../mathMLTree";
+import stretchy from "../stretchy";
+
+import * as html from "../buildHTML";
+import * as mml from "../buildMathML";
+
+import type {ParseNode} from "../parseNode";
+
+defineFunction({
+    type: "accentUnder",
+    names: [
+        "\\underleftarrow", "\\underrightarrow", "\\underleftrightarrow",
+        "\\undergroup", "\\underlinesegment", "\\utilde",
+    ],
+    props: {
+        numArgs: 1,
+    },
+    handler: ({parser, funcName}, args) => {
+        const base = args[0];
+        return {
+            type: "accentUnder",
+            mode: parser.mode,
+            label: funcName,
+            base: base,
+        };
+    },
+    htmlBuilder: (group: ParseNode<"accentUnder">, options) => {
+        // Treat under accents much like underlines.
+        const innerGroup = html.buildGroup(group.base, options);
+
+        const accentBody = stretchy.svgSpan(group, options);
+        const kern = group.label === "\\utilde" ? 0.12 : 0;
+
+        // Generate the vlist, with the appropriate kerns
+        const vlist = buildCommon.makeVList({
+            positionType: "top",
+            positionData: innerGroup.height,
+            children: [
+                {type: "elem", elem: accentBody, wrapperClasses: ["svg-align"]},
+                {type: "kern", size: kern},
+                {type: "elem", elem: innerGroup},
+            ],
+        }, options);
+
+        return buildCommon.makeSpan(["mord", "accentunder"], [vlist], options);
+    },
+    mathmlBuilder: (group, options) => {
+        const accentNode = stretchy.mathMLnode(group.label);
+        const node = new mathMLTree.MathNode(
+            "munder",
+            [mml.buildGroup(group.base, options), accentNode]
+        );
+        node.setAttribute("accentunder", "true");
+        return node;
+    },
+});