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Bug 1000376 - part 2, Implement frame construction part for anonymous grid items (reusing the anon flex item code). r=dholbert

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This commit is contained in:
Mats Palmgren 2014-05-03 13:42:33 +00:00
parent 71c593addf
commit 6b4f00d46c
2 changed files with 91 additions and 69 deletions
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139
layout/base/nsCSSFrameConstructor.cpp
View File

@ -302,14 +302,38 @@ static int32_t FFWC_recursions=0;
static int32_t FFWC_nextInFlows=0;
#endif
// Returns true if aFrame is an anonymous flex item
// Returns true if aFrame is an anonymous flex/grid item.
static inline bool
IsAnonymousFlexItem(const nsIFrame* aFrame)
IsAnonymousFlexOrGridItem(const nsIFrame* aFrame)
{
const nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo();
return pseudoType == nsCSSAnonBoxes::anonymousFlexItem;
return pseudoType == nsCSSAnonBoxes::anonymousFlexItem ||
pseudoType == nsCSSAnonBoxes::anonymousGridItem;
}
#if DEBUG
static void
AssertAnonymousFlexOrGridItemParent(const nsIFrame* aChild,
const nsIFrame* aParent)
{
MOZ_ASSERT(IsAnonymousFlexOrGridItem(aChild),
"expected an anonymous flex or grid item child frame");
MOZ_ASSERT(aParent, "expected a parent frame");
const nsIAtom* pseudoType = aChild->StyleContext()->GetPseudo();
if (pseudoType == nsCSSAnonBoxes::anonymousFlexItem) {
MOZ_ASSERT(aParent->GetType() == nsGkAtoms::flexContainerFrame,
"anonymous flex items should only exist as children "
"of flex container frames");
} else {
MOZ_ASSERT(aParent->GetType() == nsGkAtoms::gridContainerFrame,
"anonymous grid items should only exist as children "
"of grid container frames");
}
}
#else
#define AssertAnonymousFlexOrGridItemParent(x, y) do { /* nothing */ } while(0)
#endif
static inline nsIFrame*
GetFieldSetBlockFrame(nsIFrame* aFieldsetFrame)
{
@ -8541,10 +8565,8 @@ nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval(nsIFrame* aFrame,
// we're only interested in anonymous flex items here, and those can never
// be adjacent to whitespace, since they absorb contiguous runs of inline
// non-replaced content (including whitespace).
if (nextSibling && IsAnonymousFlexItem(nextSibling)) {
NS_ABORT_IF_FALSE(parent->GetType() == nsGkAtoms::flexContainerFrame,
"anonymous flex items should only exist as children "
"of flex container frames");
if (nextSibling && IsAnonymousFlexOrGridItem(nextSibling)) {
AssertAnonymousFlexOrGridItemParent(nextSibling, parent);
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: "
@ -8561,11 +8583,8 @@ nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval(nsIFrame* aFrame,
// Might need to reconstruct things if the removed frame's nextSibling is
// null and its parent is an anonymous flex item. (This might be the last
// remaining child of that anonymous flex item, which can then go away.)
if (!nextSibling && IsAnonymousFlexItem(parent)) {
NS_ABORT_IF_FALSE(parent->GetParent() &&
parent->GetParent()->GetType() == nsGkAtoms::flexContainerFrame,
"anonymous flex items should only exist as children "
"of flex container frames");
if (!nextSibling && IsAnonymousFlexOrGridItem(parent)) {
AssertAnonymousFlexOrGridItemParent(parent, parent->GetParent());
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: "
@ -8875,20 +8894,24 @@ nsCSSFrameConstructor::sPseudoParentData[eParentTypeCount] = {
};
void
nsCSSFrameConstructor::CreateNeededAnonFlexItems(
nsCSSFrameConstructor::CreateNeededAnonFlexOrGridItems(
nsFrameConstructorState& aState,
FrameConstructionItemList& aItems,
nsIFrame* aParentFrame)
{
if (aItems.IsEmpty() ||
aParentFrame->GetType() != nsGkAtoms::flexContainerFrame) {
if (aItems.IsEmpty()) {
return;
}
nsIAtom* containerType = aParentFrame->GetType();
if (containerType != nsGkAtoms::flexContainerFrame &&
containerType != nsGkAtoms::gridContainerFrame) {
return;
}
FCItemIterator iter(aItems);
do {
// Advance iter past children that don't want to be wrapped
if (iter.SkipItemsThatDontNeedAnonFlexItem(aState)) {
if (iter.SkipItemsThatDontNeedAnonFlexOrGridItem(aState)) {
// Hit the end of the items without finding any remaining children that
// need to be wrapped. We're finished!
return;
@ -8897,22 +8920,22 @@ nsCSSFrameConstructor::CreateNeededAnonFlexItems(
// If our next potentially-wrappable child is whitespace, then see if
// there's anything wrappable immediately after it. If not, we just drop
// the whitespace and move on. (We're not supposed to create any anonymous
// flex items that _only_ contain whitespace).
// flex/grid items that _only_ contain whitespace).
// (BUT if this is generated content, then we don't give whitespace nodes
// any special treatment, because they're probably not really whitespace --
// they're just temporarily empty, waiting for their generated text.)
// XXXdholbert If this node's generated text will *actually end up being
// entirely whitespace*, then we technically should still skip over it, per
// the flexbox spec. I'm not bothering with that at this point, since it's
// a pretty extreme edge case.
// the CSS grid & flexbox specs. I'm not bothering with that at this point,
// since it's a pretty extreme edge case.
if (!aParentFrame->IsGeneratedContentFrame() &&
iter.item().IsWhitespace(aState)) {
FCItemIterator afterWhitespaceIter(iter);
bool hitEnd = afterWhitespaceIter.SkipWhitespace(aState);
bool nextChildNeedsAnonFlexItem =
!hitEnd && afterWhitespaceIter.item().NeedsAnonFlexItem(aState);
bool nextChildNeedsAnonItem =
!hitEnd && afterWhitespaceIter.item().NeedsAnonFlexOrGridItem(aState);
if (!nextChildNeedsAnonFlexItem) {
if (!nextChildNeedsAnonItem) {
// There's nothing after the whitespace that we need to wrap, so we
// just drop this run of whitespace.
iter.DeleteItemsTo(afterWhitespaceIter);
@ -8924,24 +8947,25 @@ nsCSSFrameConstructor::CreateNeededAnonFlexItems(
// we jump back to the beginning of the loop to skip over that child
// (and anything else non-wrappable after it)
NS_ABORT_IF_FALSE(!iter.IsDone() &&
!iter.item().NeedsAnonFlexItem(aState),
"hitEnd and/or nextChildNeedsAnonFlexItem lied");
!iter.item().NeedsAnonFlexOrGridItem(aState),
"hitEnd and/or nextChildNeedsAnonItem lied");
continue;
}
}
// Now |iter| points to the first child that needs to be wrapped in an
// anonymous flex item. Now we see how many children after it also want
// to be wrapped in an anonymous flex item.
// anonymous flex/grid item. Now we see how many children after it also want
// to be wrapped in an anonymous flex/grid item.
FCItemIterator endIter(iter); // iterator to find the end of the group
endIter.SkipItemsThatNeedAnonFlexItem(aState);
endIter.SkipItemsThatNeedAnonFlexOrGridItem(aState);
NS_ASSERTION(iter != endIter,
"Should've had at least one wrappable child to seek past");
// Now, we create the anonymous flex item to contain the children
// Now, we create the anonymous flex or grid item to contain the children
// between |iter| and |endIter|.
nsIAtom* pseudoType = nsCSSAnonBoxes::anonymousFlexItem;
nsIAtom* pseudoType = containerType == nsGkAtoms::flexContainerFrame ?
nsCSSAnonBoxes::anonymousFlexItem : nsCSSAnonBoxes::anonymousGridItem;
nsStyleContext* parentStyle = aParentFrame->StyleContext();
nsIContent* parentContent = aParentFrame->GetContent();
already_AddRefed<nsStyleContext> wrapperStyle =
@ -8968,11 +8992,11 @@ nsCSSFrameConstructor::CreateNeededAnonFlexItems(
newItem->mIsBlock = !newItem->mIsAllInline;
NS_ABORT_IF_FALSE(!newItem->mIsAllInline && newItem->mIsBlock,
"expecting anonymous flex items to be block-level "
"expecting anonymous flex/grid items to be block-level "
"(this will make a difference when we encounter "
"'flex-align: baseline')");
"'align-items: baseline')");
// Anonymous flex items induce line boundaries around their
// Anonymous flex and grid items induce line boundaries around their
// contents.
newItem->mChildItems.SetLineBoundaryAtStart(true);
newItem->mChildItems.SetLineBoundaryAtEnd(true);
@ -9205,7 +9229,7 @@ nsCSSFrameConstructor::ConstructFramesFromItemList(nsFrameConstructorState& aSta
nsFrameItems& aFrameItems)
{
CreateNeededTablePseudos(aState, aItems, aParentFrame);
CreateNeededAnonFlexItems(aState, aItems, aParentFrame);
CreateNeededAnonFlexOrGridItems(aState, aItems, aParentFrame);
aItems.SetTriedConstructingFrames();
for (FCItemIterator iter(aItems); !iter.IsDone(); iter.Next()) {
@ -10785,56 +10809,53 @@ nsCSSFrameConstructor::WipeContainingBlock(nsFrameConstructorState& aState,
FCItemIterator iter(aItems);
// Check if we're adding to-be-wrapped content right *after* an existing
// anonymous flex item (which would need to absorb this content).
if (aPrevSibling && IsAnonymousFlexItem(aPrevSibling) &&
iter.item().NeedsAnonFlexItem(aState)) {
// anonymous flex or grid item (which would need to absorb this content).
if (aPrevSibling && IsAnonymousFlexOrGridItem(aPrevSibling) &&
iter.item().NeedsAnonFlexOrGridItem(aState)) {
RecreateFramesForContent(aFrame->GetContent(), true);
return true;
}
// Check if we're adding to-be-wrapped content right *before* an existing
// anonymous flex item (which would need to absorb this content).
if (nextSibling && IsAnonymousFlexItem(nextSibling)) {
// anonymous flex or grid item (which would need to absorb this content).
if (nextSibling && IsAnonymousFlexOrGridItem(nextSibling)) {
// Jump to the last entry in the list
iter.SetToEnd();
iter.Prev();
if (iter.item().NeedsAnonFlexItem(aState)) {
if (iter.item().NeedsAnonFlexOrGridItem(aState)) {
RecreateFramesForContent(aFrame->GetContent(), true);
return true;
}
}
}
// Situation #3 is an anonymous flex item that's getting new children who
// don't want to be wrapped.
if (IsAnonymousFlexItem(aFrame)) {
nsIFrame* flexContainerFrame = aFrame->GetParent();
NS_ABORT_IF_FALSE(flexContainerFrame &&
flexContainerFrame->GetType() == nsGkAtoms::flexContainerFrame,
"anonymous flex items should only exist as children "
"of flex container frames");
// Situation #3 is an anonymous flex or grid item that's getting new children
// who don't want to be wrapped.
if (IsAnonymousFlexOrGridItem(aFrame)) {
AssertAnonymousFlexOrGridItemParent(aFrame, aFrame->GetParent());
// We need to push a null float containing block to be sure that
// "NeedsAnonFlexItem" will know we're not honoring floats for this
// "NeedsAnonFlexOrGridItem" will know we're not honoring floats for this
// inserted content. (In particular, this is necessary in order for
// NeedsAnonFlexItem's "GetGeometricParent" call to return the correct
// result.) We're not honoring floats on this content because it has the
// _flex container_ as its parent in the content tree.
// its "GetGeometricParent" call to return the correct result.)
// We're not honoring floats on this content because it has the
// _flex/grid container_ as its parent in the content tree.
nsFrameConstructorSaveState floatSaveState;
aState.PushFloatContainingBlock(nullptr, floatSaveState);
FCItemIterator iter(aItems);
// Skip over things that _do_ need an anonymous flex item, because
// they're perfectly happy to go here -- they won't cause a reframe.
if (!iter.SkipItemsThatNeedAnonFlexItem(aState)) {
if (!iter.SkipItemsThatNeedAnonFlexOrGridItem(aState)) {
// We hit something that _doesn't_ need an anonymous flex item!
// Rebuild the flex container to bust it out.
RecreateFramesForContent(flexContainerFrame->GetContent(), true);
nsIFrame* containerFrame = aFrame->GetParent();
RecreateFramesForContent(containerFrame->GetContent(), true);
return true;
}
// If we get here, then everything in |aItems| needs to be wrapped in
// an anonymous flex item. That's where it's already going - good!
// an anonymous flex or grid item. That's where it's already going - good!
}
// Situation #4 is a case when table pseudo-frames don't work out right
@ -11239,7 +11260,7 @@ Iterator::SkipItemsWantingParentType(ParentType aParentType)
bool
nsCSSFrameConstructor::FrameConstructionItem::
NeedsAnonFlexItem(const nsFrameConstructorState& aState)
NeedsAnonFlexOrGridItem(const nsFrameConstructorState& aState)
{
if (mFCData->mBits & FCDATA_IS_LINE_PARTICIPANT) {
// This will be an inline non-replaced box.
@ -11260,11 +11281,11 @@ nsCSSFrameConstructor::FrameConstructionItem::
inline bool
nsCSSFrameConstructor::FrameConstructionItemList::
Iterator::SkipItemsThatNeedAnonFlexItem(
Iterator::SkipItemsThatNeedAnonFlexOrGridItem(
const nsFrameConstructorState& aState)
{
NS_PRECONDITION(!IsDone(), "Shouldn't be done yet");
while (item().NeedsAnonFlexItem(aState)) {
while (item().NeedsAnonFlexOrGridItem(aState)) {
Next();
if (IsDone()) {
return true;
@ -11275,11 +11296,11 @@ Iterator::SkipItemsThatNeedAnonFlexItem(
inline bool
nsCSSFrameConstructor::FrameConstructionItemList::
Iterator::SkipItemsThatDontNeedAnonFlexItem(
Iterator::SkipItemsThatDontNeedAnonFlexOrGridItem(
const nsFrameConstructorState& aState)
{
NS_PRECONDITION(!IsDone(), "Shouldn't be done yet");
while (!(item().NeedsAnonFlexItem(aState))) {
while (!(item().NeedsAnonFlexOrGridItem(aState))) {
Next();
if (IsDone()) {
return true;

21
layout/base/nsCSSFrameConstructor.h
View File

@ -791,13 +791,13 @@ private:
// Skip over non-replaced inline frames and positioned frames.
// Return whether the iterator is done after doing that.
// The iterator must not be done when this is called.
inline bool SkipItemsThatNeedAnonFlexItem(
inline bool SkipItemsThatNeedAnonFlexOrGridItem(
const nsFrameConstructorState& aState);
// Skip to the first frame that is a non-replaced inline or is
// positioned. Return whether the iterator is done after doing that.
// The iterator must not be done when this is called.
inline bool SkipItemsThatDontNeedAnonFlexItem(
inline bool SkipItemsThatDontNeedAnonFlexOrGridItem(
const nsFrameConstructorState& aState);
// Skip over whitespace. Return whether the iterator is done after doing
@ -928,9 +928,9 @@ private:
return FCDATA_DESIRED_PARENT_TYPE(mFCData->mBits);
}
// Indicates whether (when in a flexbox container) this item needs to be
// wrapped in an anonymous block.
bool NeedsAnonFlexItem(const nsFrameConstructorState& aState);
// Indicates whether (when in a flex or grid container) this item needs
// to be wrapped in an anonymous block.
bool NeedsAnonFlexOrGridItem(const nsFrameConstructorState& aState);
// Don't call this unless the frametree really depends on the answer!
// Especially so for generated content, where we don't want to reframe
@ -1020,14 +1020,15 @@ private:
};
/**
* Function to create the anonymous flex items that we need.
* If aParentFrame is not a nsFlexContainerFrame then this method is a NOP.
* Function to create the anonymous flex or grid items that we need.
* If aParentFrame is not a nsFlexContainerFrame or nsGridContainerFrame then
* this method is a NOP.
* @param aItems the child frame construction items before pseudo creation
* @param aParentFrame the parent frame
*/
void CreateNeededAnonFlexItems(nsFrameConstructorState& aState,
FrameConstructionItemList& aItems,
nsIFrame* aParentFrame);
void CreateNeededAnonFlexOrGridItems(nsFrameConstructorState& aState,
FrameConstructionItemList& aItems,
nsIFrame* aParentFrame);
/**
* Function to create the table pseudo items we need.