[Init] Initial commit - NetMesh terminal manager

components/terminal/runtime/terminalFontRemeasure.ts

@@ -0,0 +1,28 @@
+export type XTermFontRemeasureTarget = {
+  _core?: {
+    _charSizeService?: {
+      measure?: () => void;
+    };
+  };
+  options?: {
+    fontSize?: number;
+  };
+};
+
+export function forceXTermFontRemeasure(term: XTermFontRemeasureTarget): boolean {
+  const charSizeService = term._core?._charSizeService;
+  if (typeof charSizeService?.measure === "function") {
+    charSizeService.measure();
+    return true;
+  }
+
+  const options = term.options;
+  const fontSize = options?.fontSize;
+  if (typeof fontSize !== "number" || !Number.isFinite(fontSize)) return false;
+
+  // xterm remeasures fonts when fontSize changes. Nudge and restore the value
+  // so the measurement path runs without changing the user's effective size.
+  options.fontSize = fontSize + 0.001;
+  options.fontSize = fontSize;
+  return true;
+}