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Bug 1379762 part 1. Don't call MediaFeaturesChanged if our override device pixel ratio is set to its current value

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Issue #357
This commit is contained in:
janekptacijarabaci 2018-05-15 21:14:18 +02:00 • committed by Roy Tam
commit eb80674e82
4 changed files with 44 additions and 5 deletions
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11
layout/base/nsPresContext.cpp
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@ -1307,10 +1307,15 @@ nsPresContext::SetFullZoom(float aZoom)
void
nsPresContext::SetOverrideDPPX(float aDPPX)
{
mOverrideDPPX = aDPPX;
// 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));
if (HasCachedStyleData()) {
MediaFeatureValuesChanged(nsRestyleHint(0), nsChangeHint(0));
}
}
}