Issue #1619 - Convert Intrinsic Ratio to Float

https://bugzilla.mozilla.org/show_bug.cgi?id=1547792

Aspect Ratio handling simplified by using floating point integers:
- Multiplication of value (or inverse value) to a known side for Scaling
- No unequal equal values such as "4/3" vs "8/6" vs "20/15"
- Truly "Empty" aspect ratios, even if one dimension is not 0
This commit is contained in:
Andy 2020-07-31 13:01:18 -07:00 committed by Roy Tam
commit 3c02d3fc0d
32 changed files with 314 additions and 229 deletions

View file

@ -4641,10 +4641,10 @@ nsFrame::GetIntrinsicSize()
return IntrinsicSize(); // default is width/height set to eStyleUnit_None
}
/* virtual */ nsSize
/* virtual */ AspectRatio
nsFrame::GetIntrinsicRatio()
{
return nsSize(0, 0);
return AspectRatio();
}
/* virtual */
@ -4658,7 +4658,7 @@ nsFrame::ComputeSize(nsRenderingContext* aRenderingContext,
const LogicalSize& aPadding,
ComputeSizeFlags aFlags)
{
MOZ_ASSERT(GetIntrinsicRatio() == nsSize(0,0),
MOZ_ASSERT(!GetIntrinsicRatio(),
"Please override this method and call "
"nsFrame::ComputeSizeWithIntrinsicDimensions instead.");
LogicalSize result = ComputeAutoSize(aRenderingContext, aWM,
@ -4914,13 +4914,15 @@ LogicalSize
nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingContext,
WritingMode aWM,
const IntrinsicSize& aIntrinsicSize,
nsSize aIntrinsicRatio,
const AspectRatio& aIntrinsicRatio,
const LogicalSize& aCBSize,
const LogicalSize& aMargin,
const LogicalSize& aBorder,
const LogicalSize& aPadding,
ComputeSizeFlags aFlags)
{
auto logicalRatio =
aWM.IsVertical() ? aIntrinsicRatio.Inverted() : aIntrinsicRatio;
const nsStylePosition* stylePos = StylePosition();
const nsStyleCoord* inlineStyleCoord = &stylePos->ISize(aWM);
const nsStyleCoord* blockStyleCoord = &stylePos->BSize(aWM);
@ -5181,10 +5183,6 @@ nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingConte
intrinsicBSize = 0;
}
NS_ASSERTION(aIntrinsicRatio.width >= 0 && aIntrinsicRatio.height >= 0,
"Intrinsic ratio has a negative component!");
LogicalSize logicalRatio(aWM, aIntrinsicRatio);
// Now calculate the used values for iSize and bSize:
if (isAutoISize) {
@ -5198,9 +5196,29 @@ nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingConte
if (hasIntrinsicISize) {
tentISize = intrinsicISize;
} else if (hasIntrinsicBSize && logicalRatio.BSize(aWM) > 0) {
tentISize = NSCoordMulDiv(intrinsicBSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
} else if (logicalRatio.ISize(aWM) > 0) {
} else if (hasIntrinsicBSize && logicalRatio) {
// (dholbert) <https://phabricator.services.mozilla.com
// /D29244#change-5faEkbsohV7O>
// This is wrong -- this ApplyTo call (and probably every ApplyTo call
// in this function) would only be valid if we're in a horizontal
// writing mode. It's not valid in a vertical writing mode. If this
// doesn't break tests, that's a bit concerning, and I think it means
// we're missing some test coverage. (That, or I'm misreading things.)
//
// aIntrinsicRatio is stored in terms of physical axes (width/height),
// either of which could be I vs. B axis. So any sort of
// aIntrinsicRatio.ApplyTo(someBSize) operation will be
// potentially-bogus.
//
// You probably want to bring back a logicalRatio variable
// (like the one we used to have here), but now with type AspectRatio.
// It would be equal to either aIntrinsicRatio or
// aIntrinsicRatio.Invert() depending on whether aWM is horizontal or
// vertical. (And hopefully having logical in its name would be a
// reminder that it's in terms of Inline/Block and can be used for
// these sorts of ApplyTo(intrinsicBSize) operations.
tentISize = logicalRatio.ApplyTo(intrinsicBSize);
} else if (logicalRatio) {
tentISize = aCBSize.ISize(aWM) - boxSizingToMarginEdgeISize; // XXX scrollbar?
if (tentISize < 0) tentISize = 0;
} else {
@ -5217,8 +5235,8 @@ nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingConte
if (hasIntrinsicBSize) {
tentBSize = intrinsicBSize;
} else if (logicalRatio.ISize(aWM) > 0) {
tentBSize = NSCoordMulDiv(tentISize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
} else if (logicalRatio) {
tentBSize = logicalRatio.Inverted().ApplyTo(tentISize);
} else {
tentBSize = nsPresContext::CSSPixelsToAppUnits(150);
}
@ -5229,46 +5247,39 @@ nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingConte
stretchB = (stretchI == eStretch ? eStretch : eStretchPreservingRatio);
}
if (aIntrinsicRatio != nsSize(0, 0)) {
if (logicalRatio) {
if (stretchI == eStretch) {
tentISize = iSize; // * / 'stretch'
if (stretchB == eStretch) {
tentBSize = bSize; // 'stretch' / 'stretch'
} else if (stretchB == eStretchPreservingRatio && logicalRatio.ISize(aWM) > 0) {
} else if (stretchB == eStretchPreservingRatio) {
// 'normal' / 'stretch'
tentBSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
tentBSize = logicalRatio.Inverted().ApplyTo(iSize);
}
} else if (stretchB == eStretch) {
tentBSize = bSize; // 'stretch' / * (except 'stretch')
if (stretchI == eStretchPreservingRatio && logicalRatio.BSize(aWM) > 0) {
if (stretchI == eStretchPreservingRatio) {
// 'stretch' / 'normal'
tentISize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
tentISize = logicalRatio.ApplyTo(bSize);
}
} else if (stretchI == eStretchPreservingRatio) {
tentISize = iSize; // * (except 'stretch') / 'normal'
if (logicalRatio.ISize(aWM) > 0) {
tentBSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
}
tentBSize = logicalRatio.Inverted().ApplyTo(iSize);
if (stretchB == eStretchPreservingRatio && tentBSize > bSize) {
// Stretch within the CB size with preserved intrinsic ratio.
tentBSize = bSize; // 'normal' / 'normal'
if (logicalRatio.BSize(aWM) > 0) {
tentISize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
}
tentISize = logicalRatio.ApplyTo(bSize);
}
} else if (stretchB == eStretchPreservingRatio) {
tentBSize = bSize; // 'normal' / * (except 'normal' and 'stretch')
if (logicalRatio.BSize(aWM) > 0) {
tentISize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
}
tentISize = logicalRatio.ApplyTo(bSize);
}
}
// ComputeAutoSizeWithIntrinsicDimensions preserves the ratio when applying
// the min/max-size. We don't want that when we have 'stretch' in either
// axis because tentISize/tentBSize is likely not according to ratio now.
if (aIntrinsicRatio != nsSize(0, 0) &&
stretchI != eStretch && stretchB != eStretch) {
if (logicalRatio && stretchI != eStretch && stretchB != eStretch) {
nsSize autoSize = nsLayoutUtils::
ComputeAutoSizeWithIntrinsicDimensions(minISize, minBSize,
maxISize, maxBSize,
@ -5289,8 +5300,8 @@ nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingConte
// 'auto' iSize, non-'auto' bSize
bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
if (stretchI != eStretch) {
if (logicalRatio.BSize(aWM) > 0) {
iSize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
if (logicalRatio) {
iSize = logicalRatio.ApplyTo(bSize);
} else if (hasIntrinsicISize) {
if (!((aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize) &&
intrinsicISize > iSize)) {
@ -5309,8 +5320,8 @@ nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingConte
// non-'auto' iSize, 'auto' bSize
iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
if (stretchB != eStretch) {
if (logicalRatio.ISize(aWM) > 0) {
bSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
if (logicalRatio) {
bSize = logicalRatio.Inverted().ApplyTo(iSize);
} else if (hasIntrinsicBSize) {
if (!((aFlags & ComputeSizeFlags::eBClampMarginBoxMinSize) &&
intrinsicBSize > bSize)) {