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Bug 480979 part 1. Introduce FrameConstructionItem and restructure existing ConstructFrame and ProcessChildren code to use it internally without any other behavior changes. r+sr=roc

This commit is contained in:
Boris Zbarsky 2009-03-05 08:09:01 -05:00
Родитель 363542d33b
Коммит 6646059c47
2 изменённых файлов: 364 добавлений и 164 удалений
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432
layout/base/nsCSSFrameConstructor.cpp
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@ -1045,17 +1045,17 @@ nsPseudoFrames::Dump()
// Structure for saving the existing state when pushing/poping containing
// blocks. The destructor restores the state to its previous state
class nsFrameConstructorSaveState {
class NS_STACK_CLASS nsFrameConstructorSaveState {
public:
nsFrameConstructorSaveState();
~nsFrameConstructorSaveState();
private:
nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore
PRBool* mFixedPosIsAbsPos;
PRPackedBool* mFixedPosIsAbsPos;
nsAbsoluteItems mSavedItems; // copy of original data
PRBool mSavedFixedPosIsAbsPos;
PRPackedBool mSavedFixedPosIsAbsPos;
// The name of the child list in which our frames would belong
nsIAtom* mChildListName;
@ -1087,7 +1087,12 @@ public:
// elements are fixed-pos containing blocks. This flag determines
// whether or not we want to wire the fixed-pos and abs-pos lists
// together.
PRBool mFixedPosIsAbsPos;
PRPackedBool mFixedPosIsAbsPos;
// A boolean to indicate whether we have a "pending" popupgroup. That is, we
// have already created the FrameConstructionItem for the root popupgroup but
// we have not yet created the relevant frame.
PRPackedBool mHavePendingPopupgroup;
nsCOMPtr<nsILayoutHistoryState> mFrameState;
nsPseudoFrames mPseudoFrames;
@ -1210,6 +1215,7 @@ nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShe
mFixedPosIsAbsPos(aAbsoluteContainingBlock &&
aAbsoluteContainingBlock->GetStyleDisplay()->
HasTransform()),
mHavePendingPopupgroup(PR_FALSE),
mFrameState(aHistoryState),
mPseudoFrames(),
mAdditionalStateBits(0)
@ -1240,6 +1246,7 @@ nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell,
mFixedPosIsAbsPos(aAbsoluteContainingBlock &&
aAbsoluteContainingBlock->GetStyleDisplay()->
HasTransform()),
mHavePendingPopupgroup(PR_FALSE),
mPseudoFrames(),
mAdditionalStateBits(0)
{
@ -2085,23 +2092,12 @@ nsCSSFrameConstructor::CreateGeneratedContent(nsIContent* aParentContent,
return nsnull;
}
static void DestroyContent(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
nsIContent* content = static_cast<nsIContent*>(aPropertyValue);
content->UnbindFromTree();
NS_RELEASE(content);
}
/*
* aParentFrame - the frame that should be the parent of the generated
* content. This is the frame for the corresponding content node,
* which must not be a leaf frame.
*
* Any frames created are added to aFrameItems (or possibly left
* in the table pseudoframe state in aState).
* Any items created are added to aItems.
*
* We create an XML element (tag _moz_generated_content_before or
* _moz_generated_content_after) representing the pseudoelement. We
@ -2112,13 +2108,14 @@ static void DestroyContent(void *aObject,
* ::after style.
*/
void
nsCSSFrameConstructor::CreateGeneratedContentFrame(nsFrameConstructorState& aState,
nsIFrame* aParentFrame,
nsIContent* aParentContent,
nsStyleContext* aStyleContext,
nsIAtom* aPseudoElement,
nsFrameItems& aFrameItems)
nsCSSFrameConstructor::CreateGeneratedContentItem(nsFrameConstructorState& aState,
nsIFrame* aParentFrame,
nsIContent* aParentContent,
nsStyleContext* aStyleContext,
nsIAtom* aPseudoElement,
nsTArray<FrameConstructionItem>& aItems)
{
// XXXbz is this ever true?
if (!aParentContent->IsNodeOfType(nsINode::eELEMENT))
return;
@ -2138,13 +2135,11 @@ nsCSSFrameConstructor::CreateGeneratedContentFrame(nsFrameConstructorState& aSta
nsGkAtoms::mozgeneratedcontentbefore : nsGkAtoms::mozgeneratedcontentafter;
nodeInfo = mDocument->NodeInfoManager()->GetNodeInfo(elemName, nsnull,
kNameSpaceID_None);
nsIContent* container;
nsresult rv = NS_NewXMLElement(&container, nodeInfo);
nsCOMPtr<nsIContent> container;
nsresult rv = NS_NewXMLElement(getter_AddRefs(container), nodeInfo);
if (NS_FAILED(rv))
return;
container->SetNativeAnonymous();
// Transfer ownership to the frame
aParentFrame->SetProperty(aPseudoElement, container, DestroyContent);
rv = container->BindToTree(mDocument, aParentContent, aParentContent, PR_TRUE);
if (NS_FAILED(rv)) {
@ -2161,16 +2156,9 @@ nsCSSFrameConstructor::CreateGeneratedContentFrame(nsFrameConstructorState& aSta
}
}
nsFrameState savedStateBits = aState.mAdditionalStateBits;
// Ensure that frames created here are all tagged with
// NS_FRAME_GENERATED_CONTENT.
aState.mAdditionalStateBits |= NS_FRAME_GENERATED_CONTENT;
// XXXbz should we actually allow page-break frames here?
ConstructFrameInternal(aState, container, aParentFrame,
elemName, kNameSpaceID_None, pseudoStyleContext,
aFrameItems, PR_FALSE, PR_FALSE);
aState.mAdditionalStateBits = savedStateBits;
AddFrameConstructionItemInternal(aState, container, aParentFrame, elemName,
kNameSpaceID_None, pseudoStyleContext,
ITEM_IS_GENERATED_CONTENT, aItems);
}
static PRBool
@ -3062,13 +3050,13 @@ nsCSSFrameConstructor::AdjustParentFrame(nsFrameConstructorState& aState,
nsIFrame* & aParentFrame,
const FrameConstructionData* aFCData,
PRInt32 aNameSpaceID,
const nsStyleDisplay* aDisplay,
nsStyleContext* aStyleContext,
nsFrameItems* & aFrameItems,
nsFrameConstructorSaveState& aSaveState,
PRBool& aSuppressFrame,
PRBool& aCreatedPseudo)
{
NS_PRECONDITION(aDisplay, "Must have child's style context");
NS_PRECONDITION(aStyleContext, "Must have child's style context");
NS_PRECONDITION(aFrameItems, "Must have frame items to work with");
NS_PRECONDITION(aFCData, "Must have frame construction data");
@ -3088,7 +3076,9 @@ nsCSSFrameConstructor::AdjustParentFrame(nsFrameConstructorState& aState,
NS_ASSERTION(parentType != nsGkAtoms::tableOuterFrame,
"Shouldn't be happening");
if (parentType == nsGkAtoms::tableColGroupFrame) {
if (!tablePart || aDisplay->mDisplay != NS_STYLE_DISPLAY_TABLE_COLUMN) {
if (!tablePart ||
aStyleContext->GetStyleDisplay()->mDisplay !=
NS_STYLE_DISPLAY_TABLE_COLUMN) {
aSuppressFrame = PR_TRUE;
return NS_OK;
}
@ -5200,14 +5190,17 @@ nsCSSFrameConstructor::ConstructFrameFromData(const FrameConstructionData* aData
#ifdef MOZ_XUL
// Icky XUL stuff, sadly
// XXXbz if we had the FrameConstructionItem in here, we could probably
// just flag this info on the item.
if (isXUL && aTag == nsGkAtoms::popupgroup &&
aContent->IsRootOfNativeAnonymousSubtree()) {
nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell);
if (rootBox) {
NS_ASSERTION(rootBox->GetPopupSetFrame() == newFrame,
"Unexpected PopupSetFrame");
aState.mPopupItems.containingBlock = rootBox->GetPopupSetFrame();
}
NS_ASSERTION(nsIRootBox::GetRootBox(mPresShell) &&
nsIRootBox::GetRootBox(mPresShell)->GetPopupSetFrame() ==
newFrame,
"Unexpected PopupSetFrame");
aState.mPopupItems.containingBlock = newFrame;
aState.mHavePendingPopupgroup = PR_FALSE;
}
#endif /* MOZ_XUL */
@ -5294,14 +5287,8 @@ nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState,
nsIFrame* aParentFrame,
nsFrameItems& aChildItems)
{
nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame);
if (!creator)
return NS_OK;
nsresult rv;
nsAutoTArray<nsIContent*, 4> newAnonymousItems;
rv = creator->CreateAnonymousContent(newAnonymousItems);
nsresult rv = GetAnonymousContent(aParent, aParentFrame, newAnonymousItems);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 count = newAnonymousItems.Length();
@ -5309,16 +5296,58 @@ nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState,
return NS_OK;
}
nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame);
NS_ASSERTION(creator,
"How can that happen if we have nodes to construct frames for?");
// save the incoming pseudo frame state, so that we don't end up
// with those pseudoframes in aChildItems
nsPseudoFrames priorPseudoFrames;
aState.mPseudoFrames.Reset(&priorPseudoFrames);
for (PRUint32 i=0; i < count; i++) {
// get our child's content and set its parent to our content
nsIContent* content = newAnonymousItems[i];
NS_ASSERTION(content, "null anonymous content?");
nsIFrame* newFrame = creator->CreateFrameFor(content);
if (newFrame) {
aChildItems.AddChild(newFrame);
}
else {
// create the frame and attach it to our frame
ConstructFrame(aState, content, aParentFrame, aChildItems);
}
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
// restore the incoming pseudo frame state
aState.mPseudoFrames = priorPseudoFrames;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::GetAnonymousContent(nsIContent* aParent,
nsIFrame* aParentFrame,
nsTArray<nsIContent*>& aContent)
{
nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame);
if (!creator)
return NS_OK;
nsresult rv = creator->CreateAnonymousContent(aContent);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 count = aContent.Length();
for (PRUint32 i=0; i < count; i++) {
// get our child's content and set its parent to our content
nsIContent* content = aContent[i];
NS_ASSERTION(content, "null anonymous content?");
#ifdef MOZ_SVG
// least-surprise CSS binding until we do the SVG specified
// cascading rules for <svg:use> - bug 265894
@ -5336,25 +5365,8 @@ nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState,
content->UnbindFromTree();
return rv;
}
nsIFrame* newFrame = creator->CreateFrameFor(content);
if (newFrame) {
aChildItems.AddChild(newFrame);
}
else {
// create the frame and attach it to our frame
ConstructFrame(aState, content, aParentFrame, aChildItems);
}
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
// restore the incoming pseudo frame state
aState.mPseudoFrames = priorPseudoFrames;
return NS_OK;
}
@ -6470,39 +6482,53 @@ nsCSSFrameConstructor::ConstructFrame(nsFrameConstructorState& aState,
{
NS_PRECONDITION(nsnull != aParentFrame, "no parent frame");
nsAutoTArray<FrameConstructionItem, 1> items;
AddFrameConstructionItem(aState, aContent, aParentFrame, items);
nsresult rv = NS_OK;
NS_ASSERTION(items.Length() <= 1, "Unexpected number of items");
if (items.Length() == 0) {
return NS_OK;
}
return ConstructFramesFromItem(aState, items[0], aParentFrame, aFrameItems);
}
void
nsCSSFrameConstructor::AddFrameConstructionItem(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsTArray<FrameConstructionItem>& aItems)
{
// don't create a whitespace frame if aParent doesn't want it
if (!NeedFrameFor(aParentFrame, aContent)) {
return rv;
return;
}
// never create frames for comments or PIs
if (aContent->IsNodeOfType(nsINode::eCOMMENT) ||
aContent->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION))
return rv;
return;
nsRefPtr<nsStyleContext> styleContext;
styleContext = ResolveStyleContext(aParentFrame, aContent);
// construct the frame
return ConstructFrameInternal(aState, aContent, aParentFrame,
aContent->Tag(), aContent->GetNameSpaceID(),
styleContext, aFrameItems, PR_TRUE, PR_TRUE);
AddFrameConstructionItemInternal(aState, aContent, aParentFrame,
aContent->Tag(), aContent->GetNameSpaceID(),
styleContext,
ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK,
aItems);
}
nsresult
nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aAllowXBLBase,
PRBool aAllowPageBreaks)
void
nsCSSFrameConstructor::AddFrameConstructionItemInternal(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
PRUint32 aFlags,
nsTArray<FrameConstructionItem>& aItems)
{
// The following code allows the user to specify the base tag
// of an element using XBL. XUL and HTML objects (like boxes, menus, etc.)
@ -6510,13 +6536,13 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
nsRefPtr<nsStyleContext> styleContext(aStyleContext);
nsAutoEnqueueBinding binding(mDocument);
if (aAllowXBLBase && display->mBinding)
if ((aFlags & ITEM_ALLOW_XBL_BASE) && display->mBinding)
{
// Ensure that our XBL bindings are installed.
nsIXBLService * xblService = GetXBLService();
if (!xblService)
return NS_ERROR_FAILURE;
return;
PRBool resolveStyle;
@ -6526,7 +6552,7 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
getter_AddRefs(binding.mBinding),
&resolveStyle);
if (NS_FAILED(rv))
return NS_OK;
return;
if (resolveStyle) {
styleContext = ResolveStyleContext(aParentFrame, aContent);
@ -6541,7 +6567,7 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
// any frame at all
if (NS_STYLE_DISPLAY_NONE == display->mDisplay) {
aState.mFrameManager->SetUndisplayedContent(aContent, styleContext);
return NS_OK;
return;
}
PRBool isText = aContent->IsNodeOfType(nsINode::eTEXT);
@ -6552,7 +6578,7 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
#ifdef MOZ_SVG
if (!data) {
// Nothing to do here; suppressed text inside SVG
return NS_OK;
return;
}
#endif /* MOZ_SVG */
} else {
@ -6563,7 +6589,7 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
aParentFrame->IsFrameOfType(nsIFrame::eSVG) &&
!aParentFrame->IsFrameOfType(nsIFrame::eSVGForeignObject)
) {
return NS_OK;
return;
}
#endif /* MOZ_SVG */
@ -6597,33 +6623,76 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
NS_ASSERTION(data, "Should have frame construction data now");
if (data->mBits & FCDATA_SUPPRESS_FRAME) {
return NS_OK;
return;
}
#ifdef MOZ_XUL
if ((data->mBits & FCDATA_IS_POPUP) &&
aParentFrame->GetType() != nsGkAtoms::menuFrame &&
!aState.mPopupItems.containingBlock) {
return NS_OK;
!aState.mPopupItems.containingBlock &&
!aState.mHavePendingPopupgroup) {
return;
}
#endif /* MOZ_XUL */
}
PRBool isGeneratedContent = ((aFlags & ITEM_IS_GENERATED_CONTENT) != 0);
FrameConstructionItem* item = aItems.AppendElement();
if (!item) {
if (isGeneratedContent) {
aContent->UnbindFromTree();
}
return;
}
item->mFCData = data;
item->mContent = aContent;
item->mTag = aTag;
item->mNameSpaceID = aNameSpaceID;
item->mStyleContext.swap(styleContext);
item->mAllowPageBreaks = ((aFlags & ITEM_ALLOW_PAGE_BREAK) != 0);
item->mIsText = isText;
item->mIsGeneratedContent = isGeneratedContent;
if (isGeneratedContent) {
NS_ADDREF(item->mContent);
}
}
static void DestroyContent(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
nsIContent* content = static_cast<nsIContent*>(aPropertyValue);
content->UnbindFromTree();
NS_RELEASE(content);
}
nsresult
nsCSSFrameConstructor::ConstructFramesFromItem(nsFrameConstructorState& aState,
FrameConstructionItem& aItem,
nsIFrame* aParentFrame,
nsFrameItems& aFrameItems)
{
nsIFrame* adjParentFrame = aParentFrame;
nsFrameItems* frameItems = &aFrameItems;
PRBool pseudoParent = PR_FALSE;
PRBool suppressFrame = PR_FALSE;
nsStyleContext* styleContext = aItem.mStyleContext;
nsFrameConstructorSaveState pseudoSaveState;
nsresult rv = AdjustParentFrame(aState, aContent, adjParentFrame,
data, aNameSpaceID, display, frameItems,
pseudoSaveState, suppressFrame, pseudoParent);
nsresult rv = AdjustParentFrame(aState, aItem.mContent, adjParentFrame,
aItem.mFCData, aItem.mNameSpaceID,
styleContext, frameItems, pseudoSaveState,
suppressFrame, pseudoParent);
if (NS_FAILED(rv) || suppressFrame) {
return rv;
}
if (isText) {
return ConstructTextFrame(data, aState, aContent, adjParentFrame,
styleContext, *frameItems, pseudoParent);
if (aItem.mIsText) {
return ConstructTextFrame(aItem.mFCData, aState, aItem.mContent,
adjParentFrame, styleContext,
*frameItems, pseudoParent);
}
// If the page contains markup that overrides text direction, and
@ -6642,24 +6711,42 @@ nsCSSFrameConstructor::ConstructFrameInternal(nsFrameConstructorState& aState,
styleContext->GetStyleBackground();
}
nsFrameState savedStateBits = aState.mAdditionalStateBits;
if (aItem.mIsGeneratedContent) {
// Ensure that frames created here are all tagged with
// NS_FRAME_GENERATED_CONTENT.
aState.mAdditionalStateBits |= NS_FRAME_GENERATED_CONTENT;
aParentFrame->SetProperty(styleContext->GetPseudoType(),
aItem.mContent, DestroyContent);
// Now that we've passed ownership of aItem.mContent to the frame, unset
// our generated content flag so we don't release or unbind it ourselves.
aItem.mIsGeneratedContent = PR_FALSE;
}
// Construct a page break frame for page-break-before, if needed, and
// remember whether we need one for page-break-after.
PRBool pageBreakAfter =
aAllowPageBreaks &&
aItem.mAllowPageBreaks &&
aState.mPresContext->IsPaginated() &&
PageBreakBefore(aState, aContent, adjParentFrame, styleContext, data,
*frameItems);
PageBreakBefore(aState, aItem.mContent, adjParentFrame,
styleContext, aItem.mFCData, *frameItems);
rv = ConstructFrameFromData(data, aState, aContent, adjParentFrame, aTag,
aNameSpaceID, styleContext, *frameItems,
pseudoParent);
// XXXbz maybe just inline ConstructFrameFromData here or something?
rv = ConstructFrameFromData(aItem.mFCData, aState, aItem.mContent,
adjParentFrame, aItem.mTag,
aItem.mNameSpaceID, styleContext,
*frameItems, pseudoParent);
if (NS_SUCCEEDED(rv) && pageBreakAfter) {
// Construct the page break after
ConstructPageBreakFrame(aState, aContent, adjParentFrame, styleContext,
*frameItems);
ConstructPageBreakFrame(aState, aItem.mContent, adjParentFrame,
styleContext, *frameItems);
}
aState.mAdditionalStateBits = savedStateBits;
return rv;
}
@ -10133,9 +10220,9 @@ nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame* aFrame,
PRBool aCanHaveGeneratedContent,
const PRBool aCanHaveGeneratedContent,
nsFrameItems& aFrameItems,
PRBool aAllowBlockStyles)
const PRBool aAllowBlockStyles)
{
NS_PRECONDITION(aFrame, "Must have parent frame here");
NS_PRECONDITION(aFrame->GetContentInsertionFrame() == aFrame,
@ -10164,14 +10251,38 @@ nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState,
nsPseudoFrames priorPseudoFrames;
aState.mPseudoFrames.Reset(&priorPseudoFrames);
nsAutoTArray<FrameConstructionItem, 16> itemsToConstruct;
nsresult rv = NS_OK;
if (aFrame == mRootElementFrame) {
// Create any anonymous frames the initial containing block frame requires.
// This must happen before the rest of ProcessChildren to ensure that
// popups are never constructed before the popupset.
CreateAnonymousFrames(aState, aContent, aFrame, aFrameItems);
nsAutoTArray<nsIContent*, 4> anonymousItems;
GetAnonymousContent(aContent, aFrame, anonymousItems);
for (PRUint32 i = 0; i < anonymousItems.Length(); ++i) {
#ifdef DEBUG
nsIAnonymousContentCreator* creator = do_QueryFrame(aFrame);
NS_ASSERTION(!creator || !creator->CreateFrameFor(anonymousItems[i]),
"If you need to use CreateFrameFor, you need to call "
"CreateAnonymousFrames manually and not follow the standard "
"ProcessChildren() codepath for this frame");
#endif
PRUint32 c = itemsToConstruct.Length();
AddFrameConstructionItem(aState, anonymousItems[i], aFrame,
itemsToConstruct);
// Bit of a hack here to make sure that the popup stuff actually works
if (itemsToConstruct.Length() != c) {
NS_ASSERTION(itemsToConstruct.Length() == c + 1, "Unexpected length");
if (itemsToConstruct[c].mNameSpaceID == kNameSpaceID_XUL &&
itemsToConstruct[c].mTag == nsGkAtoms::popupgroup) {
aState.mHavePendingPopupgroup = PR_TRUE;
}
}
}
}
nsresult rv = NS_OK;
if (!aFrame->IsLeaf() &&
mDocument->BindingManager()->ShouldBuildChildFrames(aContent)) {
// :before/:after content should have the same style context parent
@ -10179,37 +10290,57 @@ nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState,
// Note that we don't use this style context for looking up things like
// special block styles because in some cases involving table pseudo-frames
// it has nothing to do with the parent frame's desired behavior.
nsStyleContext* styleContext =
nsFrame::CorrectStyleParentFrame(aFrame, nsnull)->GetStyleContext();
nsStyleContext* styleContext;
if (aCanHaveGeneratedContent) {
styleContext =
nsFrame::CorrectStyleParentFrame(aFrame, nsnull)->GetStyleContext();
// Probe for generated content before
CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::before,
aFrameItems);
CreateGeneratedContentItem(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::before,
itemsToConstruct);
}
ChildIterator iter, last;
for (ChildIterator::Init(aContent, &iter, &last);
iter != last;
++iter) {
rv = ConstructFrame(aState, *iter, aFrame, aFrameItems);
if (NS_FAILED(rv))
return rv;
AddFrameConstructionItem(aState, *iter, aFrame, itemsToConstruct);
}
if (aCanHaveGeneratedContent) {
// Probe for generated content after
CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::after,
aFrameItems);
CreateGeneratedContentItem(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::after,
itemsToConstruct);
}
}
if (aFrame != mRootElementFrame) {
CreateAnonymousFrames(aState, aContent, aFrame, aFrameItems);
nsAutoTArray<nsIContent*, 4> anonymousItems;
GetAnonymousContent(aContent, aFrame, anonymousItems);
for (PRUint32 i = 0; i < anonymousItems.Length(); ++i) {
#ifdef DEBUG
nsIAnonymousContentCreator* creator = do_QueryFrame(aFrame);
NS_ASSERTION(!creator || !creator->CreateFrameFor(anonymousItems[i]),
"If you need to use CreateFrameFor, you need to call "
"CreateAnonymousFrames manually and not follow the standard "
"ProcessChildren() codepath for this frame");
#endif
AddFrameConstructionItem(aState, anonymousItems[i], aFrame,
itemsToConstruct);
}
}
for (PRUint32 i = 0; i < itemsToConstruct.Length(); ++i) {
rv = ConstructFramesFromItem(aState, itemsToConstruct[i], aFrame,
aFrameItems);
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(!aState.mHavePendingPopupgroup,
"Should have proccessed it by now");
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
@ -11228,9 +11359,15 @@ nsCSSFrameConstructor::CreateListBoxContent(nsPresContext* aPresContext,
BeginUpdate();
rv = ConstructFrameInternal(state, aChild, aParentFrame, aChild->Tag(),
aChild->GetNameSpaceID(), styleContext,
frameItems, PR_TRUE, PR_FALSE);
nsAutoTArray<FrameConstructionItem, 1> items;
AddFrameConstructionItemInternal(state, aChild, aParentFrame, aChild->Tag(),
aChild->GetNameSpaceID(), styleContext,
ITEM_ALLOW_XBL_BASE, items);
if (items.Length() > 0) {
NS_ASSERTION(items.Length() == 1, "Unexpected count");
ConstructFramesFromItem(state, items[0], aParentFrame, frameItems);
}
if (!state.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(state, frameItems);
}
@ -11588,12 +11725,14 @@ nsCSSFrameConstructor::ProcessInlineChildren(nsFrameConstructorState& aState,
nsPseudoFrames prevPseudoFrames;
aState.mPseudoFrames.Reset(&prevPseudoFrames);
nsAutoTArray<FrameConstructionItem, 16> itemsToConstruct;
if (aCanHaveGeneratedContent) {
// Probe for generated content before
styleContext = aFrame->GetStyleContext();
CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::before,
aFrameItems);
CreateGeneratedContentItem(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::before,
itemsToConstruct);
}
// Iterate the child content objects and construct frames
@ -11603,12 +11742,22 @@ nsCSSFrameConstructor::ProcessInlineChildren(nsFrameConstructorState& aState,
iter != last;
++iter) {
// Construct a child frame
nsIFrame* oldLastChild = aFrameItems.lastChild;
rv = ConstructFrame(aState, *iter, aFrame, aFrameItems);
AddFrameConstructionItem(aState, *iter, aFrame, itemsToConstruct);
}
if (NS_FAILED(rv)) {
return rv;
}
if (aCanHaveGeneratedContent) {
// Probe for generated content after
CreateGeneratedContentItem(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::after,
itemsToConstruct);
}
for (PRUint32 i = 0; i < itemsToConstruct.Length(); ++i) {
nsIFrame* oldLastChild = aFrameItems.lastChild;
rv = ConstructFramesFromItem(aState, itemsToConstruct[i], aFrame,
aFrameItems);
NS_ENSURE_SUCCESS(rv, rv);
// Examine newly added children (we may have added more than one
// child if the child was another inline frame that ends up
@ -11631,13 +11780,6 @@ nsCSSFrameConstructor::ProcessInlineChildren(nsFrameConstructorState& aState,
}
}
if (aCanHaveGeneratedContent) {
// Probe for generated content after
CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::after,
aFrameItems);
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);

96
layout/base/nsCSSFrameConstructor.h
Просмотреть файл

@ -282,6 +282,7 @@ public:
PRBool IsDestroyingFrameTree() { return mIsDestroyingFrameTree; }
private:
struct FrameConstructionItem;
nsresult ReconstructDocElementHierarchyInternal();
@ -321,6 +322,11 @@ private:
nsIFrame* aParentFrame,
nsFrameItems& aFrameItems);
void AddFrameConstructionItem(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsTArray<FrameConstructionItem>& aItems);
nsresult ConstructDocElementFrame(nsFrameConstructorState& aState,
nsIContent* aDocElement,
nsIFrame* aParentFrame,
@ -375,12 +381,12 @@ private:
nsStyleContext* aStyleContext,
PRUint32 aContentIndex);
void CreateGeneratedContentFrame(nsFrameConstructorState& aState,
nsIFrame* aFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIAtom* aPseudoElement,
nsFrameItems& aFrameItems);
void CreateGeneratedContentItem(nsFrameConstructorState& aState,
nsIFrame* aFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIAtom* aPseudoElement,
nsTArray<FrameConstructionItem>& aItems);
// This method can change aFrameList: it can chop off the end and
// put it in a special sibling of aParentFrame. It can also change
@ -719,6 +725,42 @@ private:
const FrameConstructionDataByTag* aDataPtr,
PRUint32 aDataLength);
/* A struct representing an item for which frames might need to be
* constructed. This contains all the information needed to construct the
* frame other than the parent frame and whatever would be stored in the
* frame constructor state. */
struct FrameConstructionItem {
FrameConstructionItem() :
mIsGeneratedContent(PR_FALSE) {}
~FrameConstructionItem() {
if (mIsGeneratedContent) {
mContent->UnbindFromTree();
NS_RELEASE(mContent);
}
}
// The FrameConstructionData to use.
const FrameConstructionData* mFCData;
// The nsIContent node to use when initializing the new frame.
nsIContent* mContent;
// The XBL-resolved tag name to use for frame construction.
nsIAtom* mTag;
// The XBL-resolved namespace to use for frame construction.
PRInt32 mNameSpaceID;
// The style context to use for creating the new frame.
nsRefPtr<nsStyleContext> mStyleContext;
// Whether to allow page-break stuff around this frame.
PRPackedBool mAllowPageBreaks;
// Whether this is a text content item.
PRPackedBool mIsText;
// Whether this is generated content. If it is, mContent is a strong
// pointer.
PRPackedBool mIsGeneratedContent;
private:
FrameConstructionItem(const FrameConstructionItem& aOther); /* not implemented */
};
/**
* Function to adjust aParentFrame and aFrameItems to deal with table
* pseudo-frames that may have to be inserted.
@ -729,7 +771,7 @@ private:
* @param aFCData the FrameConstructionData that would be used for frame
* construction.
* @param aNameSpaceID namespace that will be used for frame construction
* @param aDisplay the display style struct for aChildContent
* @param aStyleContext the style context for aChildContent
* @param aFrameItems the framelist we think we need to put the child frame
* into. If we have to construct pseudo-frames, we'll modify the
* pointer to point to the list the child frame should go into.
@ -749,7 +791,7 @@ private:
nsIFrame* & aParentFrame,
const FrameConstructionData* aFCData,
PRInt32 aNameSpaceID,
const nsStyleDisplay* aDisplay,
nsStyleContext* aStyleContext,
nsFrameItems* & aFrameItems,
nsFrameConstructorSaveState& aSaveState,
PRBool& aSuppressFrame,
@ -872,21 +914,37 @@ private:
nsFrameItems& aFrameItems,
PRBool aHasPseudoParent);
nsresult ConstructFrameInternal(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aAllowXBLBase,
PRBool aAllowPageBreaks);
// possible flags for AddFrameConstructionItemInternal's aFlags argument
/* Allow xbl:base to affect the tag/namespace used. */
#define ITEM_ALLOW_XBL_BASE 0x1
/* Allow page-break before and after items to be created if the
style asks for them. */
#define ITEM_ALLOW_PAGE_BREAK 0x2
/* The item is a generated content item. */
#define ITEM_IS_GENERATED_CONTENT 0x4
void AddFrameConstructionItemInternal(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
PRUint32 aFlags,
nsTArray<FrameConstructionItem>& aItems);
nsresult ConstructFramesFromItem(nsFrameConstructorState& aState,
FrameConstructionItem& aItem,
nsIFrame* aParentFrame,
nsFrameItems& aFrameItems);
nsresult CreateAnonymousFrames(nsFrameConstructorState& aState,
nsIContent* aParent,
nsIFrame* aParentFrame,
nsFrameItems& aChildItems);
nsresult GetAnonymousContent(nsIContent* aParent,
nsIFrame* aParentFrame,
nsTArray<nsIContent*>& aAnonContent);
//MathML Mod - RBS
#ifdef MOZ_MATHML
/**
@ -1027,9 +1085,9 @@ private:
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame* aFrame,
PRBool aCanHaveGeneratedContent,
const PRBool aCanHaveGeneratedContent,
nsFrameItems& aFrameItems,
PRBool aAllowBlockStyles);
const PRBool aAllowBlockStyles);
nsIFrame* GetFrameFor(nsIContent* aContent);