Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/testing/web-platform/tests/mathml/support/box-navigation.js b/testing/web-platform/tests/mathml/support/box-navigation.js
new file mode 100644
index 0000000000..f4897cfe99
--- /dev/null
+++ b/testing/web-platform/tests/mathml/support/box-navigation.js
@@ -0,0 +1,29 @@
+function IsInFlow(element) {
+    var style = window.getComputedStyle(element);
+    return style.getPropertyValue("display") !== "none" &&
+        style.getPropertyValue("position") !== "absolute" &&
+        style.getPropertyValue("position") !== "fixed";
+}
+
+function firstInFlowChild(element) {
+    var child = element.firstElementChild;
+    if (!child || IsInFlow(child))
+        return child;
+    return nextInFlowSibling(child);
+}
+
+function nextInFlowSibling(element) {
+    var child = element;
+    do {
+        child = child.nextElementSibling;
+    } while (child && !IsInFlow(child));
+    return child;
+}
+
+function previousInFlowSibling(element) {
+    var child = element;
+    do {
+        child = child.previousElementSibling;
+    } while (child && !IsInFlow(child));
+    return child;
+}