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node_modules/bits-ui/dist/internal/tabbable.js

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+import { focusable, isFocusable, isTabbable, tabbable } from "tabbable";
+import { getDocument } from "svelte-toolbelt";
+function getTabbableOptions() {
+    return {
+        getShadowRoot: true,
+        displayCheck: 
+        // JSDOM does not support the `tabbable` library. To solve this we can
+        // check if `ResizeObserver` is a real function (not polyfilled), which
+        // determines if the current environment is JSDOM-like.
+        typeof ResizeObserver === "function" &&
+            ResizeObserver.toString().includes("[native code]")
+            ? "full"
+            : "none",
+    };
+}
+/**
+ * Gets all tabbable elements in the body and finds the next/previous tabbable element
+ * from the `currentNode` based on the `direction` provided.
+ * @param currentNode - the node we want to get the next/previous tabbable from
+ */
+export function getTabbableFrom(currentNode, direction) {
+    if (!isTabbable(currentNode, getTabbableOptions())) {
+        return getTabbableFromFocusable(currentNode, direction);
+    }
+    const doc = getDocument(currentNode);
+    const allTabbable = tabbable(doc.body, getTabbableOptions());
+    if (direction === "prev")
+        allTabbable.reverse();
+    const activeIndex = allTabbable.indexOf(currentNode);
+    if (activeIndex === -1)
+        return doc.body;
+    const nextTabbableElements = allTabbable.slice(activeIndex + 1);
+    return nextTabbableElements[0];
+}
+export function getTabbableFromFocusable(currentNode, direction) {
+    const doc = getDocument(currentNode);
+    if (!isFocusable(currentNode, getTabbableOptions()))
+        return doc.body;
+    // find all focusable nodes, since some elements may be focusable but not tabbable
+    // such as context menu triggers
+    const allFocusable = focusable(doc.body, getTabbableOptions());
+    // find index of current node among focusable siblings
+    if (direction === "prev")
+        allFocusable.reverse();
+    const activeIndex = allFocusable.indexOf(currentNode);
+    if (activeIndex === -1)
+        return doc.body;
+    const nextFocusableElements = allFocusable.slice(activeIndex + 1);
+    // find the next focusable node that is also tabbable
+    return nextFocusableElements.find((node) => isTabbable(node, getTabbableOptions())) ?? doc.body;
+}