Bug 1517368 - Expose PopupBlocker status via ChromeUtils, r=smaug

dom/base/ChromeUtils.cpp

@@ -770,5 +770,34 @@ constexpr auto kSkipSelfHosted = JS::SavedFrameSelfHosted::Exclude;
       NS_ConvertUTF16toUTF8(aOrigin));
 }
 
+/* static */ PopupBlockerState ChromeUtils::GetPopupControlState(
+    GlobalObject& aGlobal) {
+  switch (PopupBlocker::GetPopupControlState()) {
+    case PopupBlocker::PopupControlState::openAllowed:
+      return PopupBlockerState::OpenAllowed;
+
+    case PopupBlocker::PopupControlState::openControlled:
+      return PopupBlockerState::OpenControlled;
+
+    case PopupBlocker::PopupControlState::openBlocked:
+      return PopupBlockerState::OpenBlocked;
+
+    case PopupBlocker::PopupControlState::openAbused:
+      return PopupBlockerState::OpenAbused;
+
+    case PopupBlocker::PopupControlState::openOverridden:
+      return PopupBlockerState::OpenOverridden;
+
+    default:
+      MOZ_CRASH(
+          "PopupBlocker::PopupControlState and PopupBlockerState are out of "
+          "sync");
+  }
+}
+
+/* static */ bool ChromeUtils::IsPopupTokenUnused(GlobalObject& aGlobal) {
+  return PopupBlocker::IsPopupOpeningTokenUnused();
+}
+
 }  // namespace dom
 }  // namespace mozilla

dom/base/ChromeUtils.h

@@ -172,6 +172,10 @@ class ChromeUtils {
   static bool HasReportingHeaderForOrigin(GlobalObject& global,
                                           const nsAString& aOrigin,
                                           ErrorResult& aRv);
+
+  static PopupBlockerState GetPopupControlState(GlobalObject& aGlobal);
+
+  static bool IsPopupTokenUnused(GlobalObject& aGlobal);
 };
 
 }  // namespace dom

dom/base/PopupBlocker.cpp

@@ -141,6 +141,10 @@ PopupBlocker::GetPopupControlState() {
   return false;
 }
 
+/* static */ bool PopupBlocker::IsPopupOpeningTokenUnused() {
+  return sUnusedPopupToken;
+}
+
 /* static */ void PopupBlocker::PopupStatePusherCreated() {
   ++sPopupStatePusherCount;
 }

dom/base/PopupBlocker.h

@@ -20,6 +20,7 @@ class PopupBlocker final {
   // permissive to least permissive so that it's safe to push state in
   // all situations. Pushing popup state onto the stack never makes the
   // current popup state less permissive.
+  // Keep this in sync with PopupBlockerState webidl dictionary!
   enum PopupControlState {
     openAllowed = 0,  // open that window without worries
     openControlled,   // it's a popup, but allow it
@@ -47,6 +48,8 @@ class PopupBlocker final {
   // allowed per event.
   static bool TryUsePopupOpeningToken();
 
+  static bool IsPopupOpeningTokenUnused();
+
   static PopupBlocker::PopupControlState GetEventPopupControlState(
       WidgetEvent* aEvent, Event* aDOMEvent = nullptr);
 

dom/chrome-webidl/ChromeUtils.webidl

@@ -379,6 +379,12 @@ partial namespace ChromeUtils {
 
   [ChromeOnly, Throws]
   boolean hasReportingHeaderForOrigin(DOMString aOrigin);
+
+  [ChromeOnly]
+  PopupBlockerState getPopupControlState();
+
+  [ChromeOnly]
+  boolean isPopupTokenUnused();
 };
 
 /**
@@ -537,3 +543,12 @@ dictionary Base64URLDecodeOptions {
   /** Specifies the padding mode for decoding the input. */
   required Base64URLDecodePadding padding;
 };
+
+// Keep this in sync with PopupBlocker::PopupControlState!
+enum PopupBlockerState {
+  "openAllowed",
+  "openControlled",
+  "openBlocked",
+  "openAbused",
+  "openOverridden",
+};