summaryrefslogtreecommitdiffstats
path: root/layout/base
diff options
context:
space:
mode:
Diffstat (limited to 'layout/base')
-rw-r--r--layout/base/nsPresContext.cpp13
1 files changed, 9 insertions, 4 deletions
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));
+ }
}
}