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Use nsStyleStruct MaxDifference methods instead of maxHint for hint handling in nsStyleContext::CalcStyleDifference. (Bug 779968, patch 2) r=bzbarsky

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This commit is contained in:
L. David Baron 2012-09-07 10:13:36 -07:00
parent c0a7826aa0
commit f4c3dff3e0
1 changed files with 7 additions and 6 deletions
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13
layout/style/nsStyleContext.cpp
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@ -378,11 +378,12 @@ nsStyleContext::CalcStyleDifference(nsStyleContext* aOther)
// we could later get a small change in one of those structs that we
// don't want to miss.
// If our rule nodes are the same, then we are looking at the same
// style data. We know this because CalcStyleDifference is always
// called on two style contexts that point to the same element, so we
// know that our position in the style context tree is the same and
// our position in the rule node tree is also the same.
// If our rule nodes are the same, then any differences in style data
// are already accounted for by differences on ancestors. We know
// this because CalcStyleDifference is always called on two style
// contexts that point to the same element, so we know that our
// position in the style context tree is the same and our position in
// the rule node tree is also the same.
bool compare = mRuleNode != aOther->mRuleNode;
#define DO_STRUCT_DIFFERENCE(struct_) \
@ -393,7 +394,7 @@ nsStyleContext::CalcStyleDifference(nsStyleContext* aOther)
if (this##struct_) { \
const nsStyle##struct_* other##struct_ = aOther->GetStyle##struct_(); \
if ((compare || nsStyle##struct_::ForceCompare()) && \
!NS_IsHintSubset(maxHint, hint) && \
!NS_IsHintSubset(nsStyle##struct_::MaxDifference(), hint) && \
this##struct_ != other##struct_) { \
NS_ASSERTION(NS_IsHintSubset( \
this##struct_->CalcDifference(*other##struct_), \