First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>
2026-05-08 14:43:16 +08:00
commit 0b64e2de94
10989 changed files with 2253791 additions and 0 deletions
@@ -0,0 +1,55 @@
+// Horizontal spacing commands
+
+import defineFunction from "../defineFunction";
+import {makeGlue} from "../buildCommon";
+import {SpaceNode} from "../mathMLTree";
+import {calculateSize} from "../units";
+import {assertNodeType} from "../parseNode";
+
+// TODO: \hskip and \mskip should support plus and minus in lengths
+
+defineFunction({
+    type: "kern",
+    names: ["\\kern", "\\mkern", "\\hskip", "\\mskip"],
+    props: {
+        numArgs: 1,
+        argTypes: ["size"],
+        primitive: true,
+        allowedInText: true,
+    },
+    handler({parser, funcName}, args) {
+        const size = assertNodeType(args[0], "size");
+        if (parser.settings.strict) {
+            const mathFunction = (funcName[1] === 'm');  // \mkern, \mskip
+            const muUnit = (size.value.unit === 'mu');
+            if (mathFunction) {
+                if (!muUnit) {
+                    parser.settings.reportNonstrict("mathVsTextUnits",
+                        `LaTeX's ${funcName} supports only mu units, ` +
+                        `not ${size.value.unit} units`);
+                }
+                if (parser.mode !== "math") {
+                    parser.settings.reportNonstrict("mathVsTextUnits",
+                        `LaTeX's ${funcName} works only in math mode`);
+                }
+            } else {  // !mathFunction
+                if (muUnit) {
+                    parser.settings.reportNonstrict("mathVsTextUnits",
+                        `LaTeX's ${funcName} doesn't support mu units`);
+                }
+            }
+        }
+        return {
+            type: "kern",
+            mode: parser.mode,
+            dimension: size.value,
+        };
+    },
+    htmlBuilder(group, options) {
+        return makeGlue(group.dimension, options);
+    },
+    mathmlBuilder(group, options) {
+        const dimension = calculateSize(group.dimension, options);
+        return new SpaceNode(dimension);
+    },
+});