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Add support for calc() to ComputeWidthDependentValue and ComputeHeightDependentValue. Also change calc() handling of percents from using round to using floor, which changes our handling of percents on 'width' back to using floor, reverting an earlier change in this bug. (Bug 585715) r=bzbarsky a2.0=blocking+

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This commit is contained in:
L. David Baron 2010-08-25 12:17:55 +02:00
parent 3fc44d5786
commit 698bb0f927
2 changed files with 18 additions and 25 deletions
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39
layout/base/nsLayoutUtils.cpp
View File

@ -2147,12 +2147,8 @@ nsLayoutUtils::ComputeWidthDependentValue(
"very large sizes, not attempts at intrinsic width "
"calculation");
if (eStyleUnit_Coord == aCoord.GetUnit()) {
return aCoord.GetCoordValue();
}
if (eStyleUnit_Percent == aCoord.GetUnit()) {
return NSToCoordFloorClamped(aContainingBlockWidth *
aCoord.GetPercentValue());
if (aCoord.IsCoordPercentCalcUnit()) {
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockWidth);
}
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
aCoord.GetUnit() == eStyleUnit_Auto,
@ -2225,25 +2221,22 @@ nsLayoutUtils::ComputeHeightDependentValue(
nscoord aContainingBlockHeight,
const nsStyleCoord& aCoord)
{
if (eStyleUnit_Coord == aCoord.GetUnit()) {
return aCoord.GetCoordValue();
}
if (eStyleUnit_Percent == aCoord.GetUnit()) {
// XXXldb Some callers explicitly check aContainingBlockHeight
// against NS_AUTOHEIGHT *and* unit against eStyleUnit_Percent
// before calling this function, so this assertion probably needs to
// be inside the percentage case. However, it would be much more
// likely to catch problems if it were at the start of the function.
// XXXldb Many callers pass a non-'auto' containing block height when
// according to CSS2.1 they should be passing 'auto'.
NS_PRECONDITION(NS_AUTOHEIGHT != aContainingBlockHeight,
"unexpected 'containing block height'");
// XXXldb Some callers explicitly check aContainingBlockHeight
// against NS_AUTOHEIGHT *and* unit against eStyleUnit_Percent or
// calc()s containing percents before calling this function.
// However, it would be much more likely to catch problems without
// the unit conditions.
// XXXldb Many callers pass a non-'auto' containing block height when
// according to CSS2.1 they should be passing 'auto'.
NS_PRECONDITION(NS_AUTOHEIGHT != aContainingBlockHeight ||
(aCoord.GetUnit() != eStyleUnit_Percent &&
!(aCoord.IsCalcUnit() && aCoord.CalcHasPercent())),
"unexpected containing block height");
if (NS_AUTOHEIGHT != aContainingBlockHeight) {
return NSToCoordFloorClamped(aContainingBlockHeight *
aCoord.GetPercentValue());
}
if (aCoord.IsCoordPercentCalcUnit()) {
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockHeight);
}
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
aCoord.GetUnit() == eStyleUnit_Auto,
"unexpected height value");

4
layout/style/nsRuleNode.cpp
View File

@ -535,8 +535,8 @@ struct ComputeComputedCalcCalcOps : public css::StyleCoordInputCalcOps,
{
nscoord result;
if (aValue.GetUnit() == eStyleUnit_Percent) {
result = NSCoordSaturatingMultiply(mPercentageBasis,
aValue.GetPercentValue());
result =
NSToCoordFloorClamped(mPercentageBasis * aValue.GetPercentValue());
} else {
result = aValue.GetCoordValue();
}