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node_modules/@mixmark-io/domino/NodeTraversal.js

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+"use strict";
+/* exported NodeTraversal */
+var NodeTraversal = module.exports = {
+  nextSkippingChildren: nextSkippingChildren,
+  nextAncestorSibling: nextAncestorSibling,
+  next: next,
+  previous: previous,
+  deepLastChild: deepLastChild
+};
+
+/**
+ * @based on WebKit's NodeTraversal::nextSkippingChildren
+ * https://trac.webkit.org/browser/trunk/Source/WebCore/dom/NodeTraversal.h?rev=179143#L109
+ */
+function nextSkippingChildren(node, stayWithin) {
+  if (node === stayWithin) {
+    return null;
+  }
+  if (node.nextSibling !== null) {
+    return node.nextSibling;
+  }
+  return nextAncestorSibling(node, stayWithin);
+}
+
+/**
+ * @based on WebKit's NodeTraversal::nextAncestorSibling
+ * https://trac.webkit.org/browser/trunk/Source/WebCore/dom/NodeTraversal.cpp?rev=179143#L93
+ */
+function nextAncestorSibling(node, stayWithin) {
+  for (node = node.parentNode; node !== null; node = node.parentNode) {
+    if (node === stayWithin) {
+      return null;
+    }
+    if (node.nextSibling !== null) {
+      return node.nextSibling;
+    }
+  }
+  return null;
+}
+
+/**
+ * @based on WebKit's NodeTraversal::next
+ * https://trac.webkit.org/browser/trunk/Source/WebCore/dom/NodeTraversal.h?rev=179143#L99
+ */
+function next(node, stayWithin) {
+  var n;
+  n = node.firstChild;
+  if (n !== null) {
+    return n;
+  }
+  if (node === stayWithin) {
+    return null;
+  }
+  n = node.nextSibling;
+  if (n !== null) {
+    return n;
+  }
+  return nextAncestorSibling(node, stayWithin);
+}
+
+/**
+ * @based on WebKit's NodeTraversal::deepLastChild
+ * https://trac.webkit.org/browser/trunk/Source/WebCore/dom/NodeTraversal.cpp?rev=179143#L116
+ */
+function deepLastChild(node) {
+  while (node.lastChild) {
+    node = node.lastChild;
+  }
+  return node;
+}
+
+/**
+ * @based on WebKit's NodeTraversal::previous
+ * https://trac.webkit.org/browser/trunk/Source/WebCore/dom/NodeTraversal.h?rev=179143#L121
+ */
+function previous(node, stayWithin) {
+  var p;
+  p = node.previousSibling;
+  if (p !== null) {
+    return deepLastChild(p);
+  }
+  p = node.parentNode;
+  if (p === stayWithin) {
+    return null;
+  }
+  return p;
+}