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-rw-r--r--layout/base/nsDocumentViewer.cpp15
-rw-r--r--layout/base/nsPresContext.cpp13
2 files changed, 23 insertions, 5 deletions
diff --git a/layout/base/nsDocumentViewer.cpp b/layout/base/nsDocumentViewer.cpp
index 137efb3cd..7b8734928 100644
--- a/layout/base/nsDocumentViewer.cpp
+++ b/layout/base/nsDocumentViewer.cpp
@@ -1012,7 +1012,13 @@ nsDocumentViewer::LoadComplete(nsresult aStatus)
nsIDocShell *docShell = window->GetDocShell();
NS_ENSURE_TRUE(docShell, NS_ERROR_UNEXPECTED);
- docShell->GetRestoringDocument(&restoring);
+ // Unfortunately, docShell->GetRestoringDocument() might no longer be set
+ // correctly. In particular, it can be false by now if someone took it upon
+ // themselves to block onload from inside restoration and unblock it later.
+ // But we can detect the restoring case very simply: by whether our
+ // document's readyState is COMPLETE.
+ restoring = (mDocument->GetReadyStateEnum() ==
+ nsIDocument::READYSTATE_COMPLETE);
if (!restoring) {
NS_ASSERTION(mDocument->IsXULDocument() || // readyState for XUL is bogus
mDocument->GetReadyStateEnum() ==
@@ -1023,6 +1029,13 @@ nsDocumentViewer::LoadComplete(nsresult aStatus)
nsIDocument::READYSTATE_UNINITIALIZED &&
NS_IsAboutBlank(mDocument->GetDocumentURI())),
"Bad readystate");
+#ifdef DEBUG
+ bool docShellThinksWeAreRestoring;
+ docShell->GetRestoringDocument(&docShellThinksWeAreRestoring);
+ MOZ_ASSERT(!docShellThinksWeAreRestoring,
+ "How can docshell think we are restoring if we don't have a "
+ "READYSTATE_COMPLETE document?");
+#endif // DEBUG
nsCOMPtr<nsIDocument> d = mDocument;
mDocument->SetReadyStateInternal(nsIDocument::READYSTATE_COMPLETE);
diff --git a/layout/base/nsPresContext.cpp b/layout/base/nsPresContext.cpp
index 4a54a8432..3106ff386 100644
--- a/layout/base/nsPresContext.cpp
+++ b/layout/base/nsPresContext.cpp
@@ -1307,10 +1307,15 @@ nsPresContext::SetFullZoom(float aZoom)
void
nsPresContext::SetOverrideDPPX(float aDPPX)
{
- mOverrideDPPX = aDPPX;
-
- if (HasCachedStyleData()) {
- MediaFeatureValuesChanged(nsRestyleHint(0), nsChangeHint(0));
+ // SetOverrideDPPX is called during navigations, including history
+ // traversals. In that case, it's typically called with our current value,
+ // and we don't need to actually do anything.
+ if (aDPPX != mOverrideDPPX) {
+ mOverrideDPPX = aDPPX;
+
+ if (HasCachedStyleData()) {
+ MediaFeatureValuesChanged(nsRestyleHint(0), nsChangeHint(0));
+ }
}
}