Commit 136ccf14 authored by Olli Pettay's avatar Olli Pettay
Browse files

Bug 1521603 - Add a helper method to check if the top level content document... 

Bug 1521603 - Add a helper method to check if the top level content document hasn't yet got first contentful paint and there is high prio event pending, r=jesup

--HG--
extra : rebase_source : 23ae3ef0cbb43db81d333135a0d6c52d64fb5fcf
parent 322fd9de

dom/base/nsContentUtils.cpp

+15 −1
Original line number Diff line number Diff line
@@ -237,7 +237,7 @@ 
#include "mozilla/Encoding.h"

#include "nsXULElement.h"

#include "mozilla/RecordReplay.h"



#include "nsThreadManager.h"

#include "nsIBidiKeyboard.h"



#if defined(XP_WIN)
@@ -10435,6 +10435,20 @@ static bool JSONCreator(const char16_t* aBuf, uint32_t aLen, void* aData) { 
  return true;

}



/* static */

bool nsContentUtils::HighPriorityEventPendingForTopLevelDocumentBeforeContentfulPaint(

    Document* aDocument) {

  if (!aDocument) {

    return false;

  }



  Document* topLevel = aDocument->GetTopLevelContentDocument();

  return topLevel && topLevel->GetShell() &&

         topLevel->GetShell()->GetPresContext() &&

         !topLevel->GetShell()->GetPresContext()->HadContentfulPaint() &&

         nsThreadManager::MainThreadHasPendingHighPriorityEvents();

}



/* static */ bool nsContentUtils::IsURIInPrefList(nsIURI* aURI,

                                                  const char* aPrefName) {

  MOZ_ASSERT(aPrefName);

dom/base/nsContentUtils.h

+8 −0
Original line number Diff line number Diff line
@@ -3304,6 +3304,14 @@ class nsContentUtils { 
  static bool StringifyJSON(JSContext* aCx, JS::MutableHandle<JS::Value> vp,

                            nsAString& aOutStr);



  /**

   * Returns true if the top level ancestor content document of aDocument hasn't

   * yet had the first contentful paint and there is a high priority event

   * pending in the main thread.

   */

  static bool HighPriorityEventPendingForTopLevelDocumentBeforeContentfulPaint(

      Document* aDocument);



 private:

  static bool InitializeEventTable();