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Bug 1047928 patch 9 - Don't rerun selector matching for viewport units. r=bzbarsky

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This commit is contained in:
L. David Baron 2014-10-08 14:27:03 -07:00
parent 91602cb4e6
commit aedbfdef2c
1 changed files with 18 additions and 10 deletions
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28
layout/base/nsPresContext.cpp
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@ -1885,19 +1885,27 @@ void
nsPresContext::MediaFeatureValuesChanged(StyleRebuildType aShouldRebuild,
nsChangeHint aChangeHint)
{
NS_ASSERTION(aShouldRebuild == eAlwaysRebuildStyle || aChangeHint == 0,
"If you don't know if we need a rebuild, how can you provide a hint?");
mPendingMediaFeatureValuesChanged = false;
// MediumFeaturesChanged updates the applied rules, so it always gets called.
bool mediaFeaturesDidChange = mShell ? mShell->StyleSet()->MediumFeaturesChanged(this)
: false;
nsRestyleHint aRestyleHint = nsRestyleHint(0);
if (aShouldRebuild == eAlwaysRebuildStyle ||
mediaFeaturesDidChange ||
(mUsesViewportUnits && mPendingViewportChange)) {
RebuildAllStyleData(aChangeHint, eRestyle_Subtree);
if (aShouldRebuild == eAlwaysRebuildStyle) {
// FIXME: Pass restyle hint from caller.
aRestyleHint |= eRestyle_Subtree;
}
// MediumFeaturesChanged updates the applied rules, so it always gets called.
if (mShell && mShell->StyleSet()->MediumFeaturesChanged(this)) {
aRestyleHint |= eRestyle_Subtree;
}
if (mUsesViewportUnits && mPendingViewportChange) {
// Rebuild all style data without rerunning selector matching.
aRestyleHint |= eRestyle_ForceDescendants;
}
if (aRestyleHint || aChangeHint) {
RebuildAllStyleData(aChangeHint, aRestyleHint);
}
mPendingViewportChange = false;