Merge pull request 'Destroy the host frame and restyle when there are content changes' (#2152) from FranklinDM/UXP-contrib:work_wc-content-change-fix into master

Reviewed-on: https://repo.palemoon.org/MoonchildProductions/UXP/pulls/2152

1 files changed, 14 insertions, 0 deletions

diff --git a/dom/base/ShadowRoot.cpp b/dom/base/ShadowRoot.cpp
index e31b97262c..92d5a2f2a9 100644
--- a/dom/base/ShadowRoot.cpp
+++ b/dom/base/ShadowRoot.cpp
@@ -578,6 +578,13 @@ ShadowRoot::ContentInserted(nsIDocument* aDocument,
   if (slot && slot->GetContainingShadow() == this &&
       slot->AssignedNodes().IsEmpty()) {
     slot->EnqueueSlotChangeEvent();
+    return;
+  }
+  
+  // XXX: The following makes the host destroy its frames and force a
+  // restyle for cases where the content isn't slotted.
+  if (aContainer == this) {
+    DistributionChanged();
   }
 }
 
@@ -614,6 +621,13 @@ ShadowRoot::ContentRemoved(nsIDocument* aDocument,
   if (slot && slot->GetContainingShadow() == this &&
       slot->AssignedNodes().IsEmpty()) {
     slot->EnqueueSlotChangeEvent();
+    return;
+  }
+
+  // XXX: The following makes the host destroy its frames and force a
+  // restyle for cases where the content isn't slotted.
+  if (aContainer == this) {
+    DistributionChanged();
   }
 }