Portals: Support adoption of the predecessor.

This CL adds support for an activated portal to adopt its predecessor as a portal. Adopting the predecessor enables developers to quickly transition back and forth between different pages. Bug: 914122 Change-Id: I80381017ddb774da20ae07efcba2f4fee733fc3c Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1456869 Commit-Queue: Lucas Gadani <lfg@chromium.org> Reviewed-by: Daniel Cheng <dcheng@chromium.org> Reviewed-by: Jeremy Roman <jbroman@chromium.org> Reviewed-by: Charlie Reis <creis@chromium.org> Cr-Commit-Position: refs/heads/master@{#643463}
web-platform-tests · Jul 23, 2019 · f13bccf · f13bccf
1 parent 1cf5241
commit f13bccf
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diff --git a/portals/portals-adopt-predecessor.html b/portals/portals-adopt-predecessor.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<title>Tests that a portal can adopt its predecessor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  async_test(function(t) {
+    var bc = new BroadcastChannel("portal-test");
+    bc.onmessage = t.step_func_done(function(e) {
+      assert_equals(e.data, "passed");
+      bc.close();
+    });
+    window.open("resources/portals-adopt-predecessor.html");
+  }, "Tests that a portal can adopt its predecessor.");
+</script>
diff --git a/portals/resources/portals-adopt-predecessor-portal.html b/portals/resources/portals-adopt-predecessor-portal.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<script>
+  window.onportalactivate = function(e) {
+    var portal = e.adoptPredecessor();
+    document.body.appendChild(portal);
+
+    if (portal instanceof HTMLPortalElement) {
+      var bc_adopted = new BroadcastChannel("portal-adopted");
+      bc_adopted.postMessage("adopted");
+      bc_adopted.close();
+    }
+  }
+
+  var bc_loaded = new BroadcastChannel("portal-loaded");
+  bc_loaded.postMessage("loaded");
+  bc_loaded.close();
+</script>
diff --git a/portals/resources/portals-adopt-predecessor.html b/portals/resources/portals-adopt-predecessor.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<body>
+  <portal src="portals-adopt-predecessor-portal.html"></portal>
+</body>
+<script>
+  var bc_loaded = new BroadcastChannel("portal-loaded");
+  bc_loaded.onmessage = function(e) {
+    document.querySelector("portal").activate();
+    bc_loaded.close();
+
+    var bc_adopted = new BroadcastChannel("portal-adopted");
+    bc_adopted.onmessage = function(e) {
+      bc_adopted.close();
+
+      var bc_test = new BroadcastChannel("portal-test");
+      bc_test.postMessage("passed");
+      bc_test.close();
+    }
+  }
+</script>