chore: import upstream snapshot with attribution

doc/source/_static/js/custom.js

@@ -0,0 +1,95 @@
+let new_termynals = [];
+
+function createTermynals() {
+    const containers = document.getElementsByClassName("termynal");
+    Array.from(containers).forEach(addTermynal);
+}
+
+function addTermynal(container) {
+    const t = new Termynal(container, {
+        noInit: true,
+    });
+    new_termynals.push(t);
+}
+
+// Initialize Termynals that are visible on the page. Once initialized, remove
+// the Termynal from terminals that remain to be loaded.
+function loadVisibleTermynals() {
+    new_termynals = new_termynals.filter(termynal => {
+        if (termynal.container.getBoundingClientRect().top - innerHeight <= 0) {
+            termynal.init();
+            return false;
+        }
+        return true;
+    });
+}
+
+// Store the state of the page in the browser's local storage.
+// For now this includes just the sidebar scroll position.
+document.addEventListener("DOMContentLoaded", () => {
+  const sidebar = document.getElementById("main-sidebar")
+
+  window.addEventListener("beforeunload", () => {
+    if (sidebar) {
+      localStorage.setItem("scroll", sidebar.scrollTop)
+    }
+  })
+
+  const storedScrollPosition = localStorage.getItem("scroll")
+  if (storedScrollPosition) {
+    if (sidebar) {
+      sidebar.scrollTop = storedScrollPosition;
+    }
+    localStorage.removeItem("scroll");
+  }
+
+})
+
+// Send GA events any time a code block is copied
+document.addEventListener("DOMContentLoaded", function() {
+    let codeButtons = document.querySelectorAll(".copybtn");
+        for (let i = 0; i < codeButtons.length; i++) {
+            const button = codeButtons[i];
+            button.addEventListener("click", function() {
+                if (typeof window.dataLayer === 'undefined' || !Array.isArray(window.dataLayer)) {
+                    console.warn('Google Tag Manager dataLayer not available - code copy not tracked');
+                    return;
+                }
+
+                window.dataLayer.push({
+                    event: "code_copy_click",
+                    category: "ray_docs_copy_code",
+                    page_location: window.location.href,
+                    page_title: document.title,
+                    button_target: button.getAttribute("data-clipboard-target") || "unknown",
+                    value: 1,
+                });
+            });
+        }
+});
+
+document.addEventListener("DOMContentLoaded", function() {
+  let anyscaleButton = document.getElementById("try-anyscale")
+  if (anyscaleButton) {
+    anyscaleButton.onclick = () => {
+      if (typeof window.dataLayer === 'undefined' || !Array.isArray(window.dataLayer)) {
+          console.warn('Google Tag Manager dataLayer not available - try anyscale click not tracked');
+          return;
+      }
+
+      window.dataLayer.push({
+          event: "try_anyscale_click",
+          category: "TryAnyscale",
+          page_location: window.location.href,
+          page_title: document.title,
+          link_url: "https://www.anyscale.com",
+          value: 1,
+      });
+      window.open('https://www.anyscale.com', '_blank');
+    }
+  }
+});
+
+window.addEventListener("scroll", loadVisibleTermynals);
+createTermynals();
+loadVisibleTermynals();