/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Pierre Phaneuf * Elika J. Etemad ("fantasai") * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* base class #1 for rendering objects that have child lists */ #include "nsContainerFrame.h" #include "nsHTMLContainerFrame.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsPresContext.h" #include "nsIRenderingContext.h" #include "nsStyleContext.h" #include "nsRect.h" #include "nsPoint.h" #include "nsGUIEvent.h" #include "nsStyleConsts.h" #include "nsIView.h" #include "nsHTMLContainerFrame.h" #include "nsFrameManager.h" #include "nsIPresShell.h" #include "nsCOMPtr.h" #include "nsGkAtoms.h" #include "nsCSSAnonBoxes.h" #include "nsIViewManager.h" #include "nsIWidget.h" #include "nsGfxCIID.h" #include "nsIServiceManager.h" #include "nsCSSRendering.h" #include "nsTransform2D.h" #include "nsRegion.h" #include "nsLayoutErrors.h" #include "nsDisplayList.h" #include "nsContentErrors.h" #include "nsIEventStateManager.h" #include "nsListControlFrame.h" #include "nsIBaseWindow.h" #include "nsThemeConstants.h" #include "nsCSSFrameConstructor.h" #include "nsThemeConstants.h" #ifdef NS_DEBUG #undef NOISY #else #undef NOISY #endif NS_IMPL_FRAMEARENA_HELPERS(nsContainerFrame) nsContainerFrame::~nsContainerFrame() { } NS_IMETHODIMP nsContainerFrame::Init(nsIContent* aContent, nsIFrame* aParent, nsIFrame* aPrevInFlow) { nsresult rv = nsSplittableFrame::Init(aContent, aParent, aPrevInFlow); if (aPrevInFlow) { // Make sure we copy bits from our prev-in-flow that will affect // us. A continuation for a container frame needs to know if it // has a child with a view so that we'll properly reposition it. if (aPrevInFlow->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW) AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); } return rv; } NS_IMETHODIMP nsContainerFrame::SetInitialChildList(nsIAtom* aListName, nsFrameList& aChildList) { nsresult result; if (!mFrames.IsEmpty()) { // We already have child frames which means we've already been // initialized NS_NOTREACHED("unexpected second call to SetInitialChildList"); result = NS_ERROR_UNEXPECTED; } else if (aListName) { // All we know about is the unnamed principal child list NS_NOTREACHED("unknown frame list"); result = NS_ERROR_INVALID_ARG; } else { #ifdef NS_DEBUG nsFrame::VerifyDirtyBitSet(aChildList); #endif mFrames.SetFrames(aChildList); result = NS_OK; } return result; } NS_IMETHODIMP nsContainerFrame::AppendFrames(nsIAtom* aListName, nsFrameList& aFrameList) { if (nsnull != aListName) { #ifdef IBMBIDI if (aListName != nsGkAtoms::nextBidi) #endif { NS_ERROR("unexpected child list"); return NS_ERROR_INVALID_ARG; } } if (aFrameList.NotEmpty()) { mFrames.AppendFrames(this, aFrameList); // Ask the parent frame to reflow me. #ifdef IBMBIDI if (nsnull == aListName) #endif { PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_HAS_DIRTY_CHILDREN); } } return NS_OK; } NS_IMETHODIMP nsContainerFrame::InsertFrames(nsIAtom* aListName, nsIFrame* aPrevFrame, nsFrameList& aFrameList) { NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this, "inserting after sibling frame with different parent"); if (nsnull != aListName) { #ifdef IBMBIDI if (aListName != nsGkAtoms::nextBidi) #endif { NS_ERROR("unexpected child list"); return NS_ERROR_INVALID_ARG; } } if (aFrameList.NotEmpty()) { // Insert frames after aPrevFrame mFrames.InsertFrames(this, aPrevFrame, aFrameList); #ifdef IBMBIDI if (nsnull == aListName) #endif { PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_HAS_DIRTY_CHILDREN); } } return NS_OK; } NS_IMETHODIMP nsContainerFrame::RemoveFrame(nsIAtom* aListName, nsIFrame* aOldFrame) { if (nsnull != aListName) { #ifdef IBMBIDI if (nsGkAtoms::nextBidi != aListName) #endif { NS_ERROR("unexpected child list"); return NS_ERROR_INVALID_ARG; } } if (aOldFrame) { // Loop and destroy the frame and all of its continuations. // If the frame we are removing is a brFrame, we need a reflow so // the line the brFrame was on can attempt to pull up any frames // that can fit from lines below it. PRBool generateReflowCommand = PR_TRUE; #ifdef IBMBIDI if (nsGkAtoms::nextBidi == aListName) { generateReflowCommand = PR_FALSE; } #endif nsContainerFrame* parent = static_cast(aOldFrame->GetParent()); while (aOldFrame) { // When the parent is an inline frame we have a simple task - just // remove the frame from its parents list and generate a reflow // command. nsIFrame* oldFrameNextContinuation = aOldFrame->GetNextContinuation(); //XXXfr probably should use StealFrame here. I'm not sure if we need to // check the overflow lists atm, but we'll need a prescontext lookup // for overflow containers once we can split abspos elements with // inline containing blocks. if (parent == this) { if (!parent->mFrames.DestroyFrame(aOldFrame)) { // Try to remove it from our overflow list, if we have one. // The simplest way is to reuse StealFrame. #ifdef DEBUG nsresult rv = #endif StealFrame(PresContext(), aOldFrame, PR_TRUE); NS_ASSERTION(NS_SUCCEEDED(rv), "Could not find frame to remove!"); aOldFrame->Destroy(); } } else { // This recursive call takes care of all continuations after aOldFrame, // so we don't need to loop anymore. parent->RemoveFrame(nsnull, aOldFrame); break; } aOldFrame = oldFrameNextContinuation; if (aOldFrame) { parent = static_cast(aOldFrame->GetParent()); } } if (generateReflowCommand) { PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_HAS_DIRTY_CHILDREN); } } return NS_OK; } void nsContainerFrame::Destroy() { // Prevent event dispatch during destruction if (HasView()) { GetView()->SetClientData(nsnull); } // Delete the primary child list mFrames.DestroyFrames(); // Destroy auxiliary frame lists nsPresContext* prescontext = PresContext(); DestroyOverflowList(prescontext); if (IsFrameOfType(nsIFrame::eCanContainOverflowContainers)) { nsFrameList* frameList = RemovePropTableFrames(prescontext, nsGkAtoms::overflowContainersProperty); if (frameList) frameList->Destroy(); frameList = RemovePropTableFrames(prescontext, nsGkAtoms::excessOverflowContainersProperty); if (frameList) frameList->Destroy(); } if (IsGeneratedContentFrame()) { // Make sure all the content nodes for the generated content inside // this frame know it's going away. // See also nsCSSFrameConstructor::CreateGeneratedContentFrame which // created this frame. nsCOMArray* generatedContent = static_cast*>( UnsetProperty(nsGkAtoms::generatedContent)); if (generatedContent) { for (int i = generatedContent->Count() - 1; i >= 0; --i) { nsIContent* content = generatedContent->ObjectAt(i); // Tell the ESM that this content is going away now, so it'll update // its hover content, etc. PresContext()->EventStateManager()-> ContentRemoved(content->GetCurrentDoc(), content); content->UnbindFromTree(); } delete generatedContent; } } // Destroy the frame and remove the flow pointers nsSplittableFrame::Destroy(); } ///////////////////////////////////////////////////////////////////////////// // Child frame enumeration nsFrameList nsContainerFrame::GetChildList(nsIAtom* aListName) const { // We only know about the unnamed principal child list and the overflow // lists if (nsnull == aListName) { return mFrames; } if (nsGkAtoms::overflowList == aListName) { nsFrameList* frameList = GetOverflowFrames(); return frameList ? *frameList : nsFrameList::EmptyList(); } if (nsGkAtoms::overflowContainersList == aListName) { nsFrameList* list = GetPropTableFrames(PresContext(), nsGkAtoms::overflowContainersProperty); return list ? *list : nsFrameList::EmptyList(); } if (nsGkAtoms::excessOverflowContainersList == aListName) { nsFrameList* list = GetPropTableFrames(PresContext(), nsGkAtoms::excessOverflowContainersProperty); return list ? *list : nsFrameList::EmptyList(); } return nsFrameList::EmptyList(); } #define NS_CONTAINER_FRAME_OVERFLOW_LIST_INDEX 0 #define NS_CONTAINER_FRAME_OVERFLOW_CONTAINERS_LIST_INDEX 1 #define NS_CONTAINER_FRAME_EXCESS_OVERFLOW_CONTAINERS_LIST_INDEX 2 // If adding/removing lists, don't forget to update count in .h file nsIAtom* nsContainerFrame::GetAdditionalChildListName(PRInt32 aIndex) const { if (NS_CONTAINER_FRAME_OVERFLOW_LIST_INDEX == aIndex) return nsGkAtoms::overflowList; else if (IsFrameOfType(nsIFrame::eCanContainOverflowContainers)) { if (NS_CONTAINER_FRAME_OVERFLOW_CONTAINERS_LIST_INDEX == aIndex) return nsGkAtoms::overflowContainersList; else if (NS_CONTAINER_FRAME_EXCESS_OVERFLOW_CONTAINERS_LIST_INDEX == aIndex) return nsGkAtoms::excessOverflowContainersList; } return nsnull; } ///////////////////////////////////////////////////////////////////////////// // Painting/Events NS_IMETHODIMP nsContainerFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists); NS_ENSURE_SUCCESS(rv, rv); return BuildDisplayListForNonBlockChildren(aBuilder, aDirtyRect, aLists); } nsresult nsContainerFrame::BuildDisplayListForNonBlockChildren(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists, PRUint32 aFlags) { nsIFrame* kid = mFrames.FirstChild(); // Put each child's background directly onto the content list nsDisplayListSet set(aLists, aLists.Content()); // The children should be in content order while (kid) { nsresult rv = BuildDisplayListForChild(aBuilder, kid, aDirtyRect, set, aFlags); NS_ENSURE_SUCCESS(rv, rv); kid = kid->GetNextSibling(); } return NS_OK; } /* virtual */ void nsContainerFrame::ChildIsDirty(nsIFrame* aChild) { AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN); } PRBool nsContainerFrame::IsLeaf() const { return PR_FALSE; } PRBool nsContainerFrame::PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset) { NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range"); // Don't allow the caret to stay in an empty (leaf) container frame. return PR_FALSE; } PRBool nsContainerFrame::PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset) { NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range"); // Don't allow the caret to stay in an empty (leaf) container frame. return PR_FALSE; } ///////////////////////////////////////////////////////////////////////////// // Helper member functions /** * Position the view associated with |aKidFrame|, if there is one. A * container frame should call this method after positioning a frame, * but before |Reflow|. */ void nsContainerFrame::PositionFrameView(nsIFrame* aKidFrame) { nsIFrame* parentFrame = aKidFrame->GetParent(); if (!aKidFrame->HasView() || !parentFrame) return; nsIView* view = aKidFrame->GetView(); nsIViewManager* vm = view->GetViewManager(); nsPoint pt; nsIView* ancestorView = parentFrame->GetClosestView(&pt); if (ancestorView != view->GetParent()) { NS_ASSERTION(ancestorView == view->GetParent()->GetParent(), "Allowed only one anonymous view between frames"); // parentFrame is responsible for positioning aKidFrame's view // explicitly return; } pt += aKidFrame->GetPosition(); vm->MoveViewTo(view, pt.x, pt.y); } static PRBool IsMenuPopup(nsIFrame *aFrame) { nsIAtom *frameType = aFrame->GetType(); // We're a menupopup if we're the list control frame dropdown for a combobox. if (frameType == nsGkAtoms::listControlFrame) { nsListControlFrame *listControlFrame = static_cast(aFrame); if (listControlFrame) { return listControlFrame->IsInDropDownMode(); } } // ... or if we're a XUL menupopup frame. return (frameType == nsGkAtoms::menuPopupFrame); } static nsIWidget* GetPresContextContainerWidget(nsPresContext* aPresContext) { nsCOMPtr container = aPresContext->Document()->GetContainer(); nsCOMPtr baseWindow = do_QueryInterface(container); if (!baseWindow) return nsnull; nsCOMPtr mainWidget; baseWindow->GetMainWidget(getter_AddRefs(mainWidget)); return mainWidget; } static PRBool IsTopLevelWidget(nsIWidget* aWidget) { nsWindowType windowType; aWidget->GetWindowType(windowType); return windowType == eWindowType_toplevel || windowType == eWindowType_dialog || windowType == eWindowType_sheet; // popups aren't toplevel so they're not handled here } void nsContainerFrame::SyncWindowProperties(nsPresContext* aPresContext, nsIFrame* aFrame, nsIView* aView) { #ifdef MOZ_XUL if (!aView || !nsCSSRendering::IsCanvasFrame(aFrame) || !aView->HasWidget()) return; nsIWidget* windowWidget = GetPresContextContainerWidget(aPresContext); if (!windowWidget || !IsTopLevelWidget(windowWidget)) return; nsIViewManager* vm = aView->GetViewManager(); nsIView* rootView; vm->GetRootView(rootView); if (aView != rootView) return; nsIContent* rootContent = aPresContext->Document()->GetRootContent(); if (!rootContent || !rootContent->IsNodeOfType(nsINode::eXUL)) { // Scrollframes use native widgets which don't work well with // translucent windows, at least in Windows XP. So if the document // has a root scrollrame it's useless to try to make it transparent, // we'll just get something broken. // nsCSSFrameConstructor::ConstructRootFrame constructs root // scrollframes whenever the root element is not a XUL element, so // we test for that here. We can't just call // presShell->GetRootScrollFrame() since that might not have // been constructed yet. // We can change this to allow translucent toplevel HTML documents // (e.g. to do something like Dashboard widgets), once we // have broad support for translucent scrolled documents, but be // careful because apparently some Firefox extensions expect // openDialog("something.html") to produce an opaque window // even if the HTML doesn't have a background-color set. return; } nsIFrame *rootFrame = aPresContext->PresShell()->FrameConstructor()->GetRootElementStyleFrame(); if (!rootFrame) return; nsTransparencyMode mode = nsLayoutUtils::GetFrameTransparency(aFrame, rootFrame); nsIWidget* viewWidget = aView->GetWidget(); viewWidget->SetTransparencyMode(mode); windowWidget->SetWindowShadowStyle(rootFrame->GetStyleUIReset()->mWindowShadow); #endif } void nsContainerFrame::SyncFrameViewAfterReflow(nsPresContext* aPresContext, nsIFrame* aFrame, nsIView* aView, const nsRect* aCombinedArea, PRUint32 aFlags) { if (!aView) { return; } NS_ASSERTION(aCombinedArea, "Combined area must be passed in now"); // Make sure the view is sized and positioned correctly if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) { PositionFrameView(aFrame); } if (0 == (aFlags & NS_FRAME_NO_SIZE_VIEW)) { nsIViewManager* vm = aView->GetViewManager(); vm->ResizeView(aView, *aCombinedArea, PR_TRUE); } } void nsContainerFrame::SyncFrameViewProperties(nsPresContext* aPresContext, nsIFrame* aFrame, nsStyleContext* aStyleContext, nsIView* aView, PRUint32 aFlags) { NS_ASSERTION(!aStyleContext || aFrame->GetStyleContext() == aStyleContext, "Wrong style context for frame?"); if (!aView) { return; } nsIViewManager* vm = aView->GetViewManager(); /* If this frame has a -moz-transform property, tell it to invalidate on a scroll * rather than doing a BitBlt. */ if (aFrame->GetStyleDisplay()->HasTransform()) aView->SetInvalidateFrameOnScroll(); if (nsnull == aStyleContext) { aStyleContext = aFrame->GetStyleContext(); } // Make sure visibility is correct. This only affects nsSubdocumentFrame. if (0 == (aFlags & NS_FRAME_NO_VISIBILITY) && !aFrame->SupportsVisibilityHidden()) { // See if the view should be hidden or visible vm->SetViewVisibility(aView, aStyleContext->GetStyleVisibility()->IsVisible() ? nsViewVisibility_kShow : nsViewVisibility_kHide); } // See if the frame is being relatively positioned or absolutely // positioned PRBool isPositioned = aStyleContext->GetStyleDisplay()->IsPositioned(); PRInt32 zIndex = 0; PRBool autoZIndex = PR_FALSE; if (!isPositioned) { autoZIndex = PR_TRUE; } else { // Make sure z-index is correct const nsStylePosition* position = aStyleContext->GetStylePosition(); if (position->mZIndex.GetUnit() == eStyleUnit_Integer) { zIndex = position->mZIndex.GetIntValue(); } else if (position->mZIndex.GetUnit() == eStyleUnit_Auto) { autoZIndex = PR_TRUE; } } vm->SetViewZIndex(aView, autoZIndex, zIndex, isPositioned); } PRBool nsContainerFrame::FrameNeedsView(nsIFrame* aFrame) { // XXX Check needed because frame construction can't properly figure out when // a frame is the child of a scrollframe if (aFrame->GetStyleContext()->GetPseudoType() == nsCSSAnonBoxes::scrolledContent) { return PR_TRUE; } return aFrame->NeedsView() || aFrame->GetStyleDisplay()->HasTransform(); } static nscoord GetCoord(const nsStyleCoord& aCoord, nscoord aIfNotCoord) { return aCoord.GetUnit() == eStyleUnit_Coord ? aCoord.GetCoordValue() : aIfNotCoord; } void nsContainerFrame::DoInlineIntrinsicWidth(nsIRenderingContext *aRenderingContext, InlineIntrinsicWidthData *aData, nsLayoutUtils::IntrinsicWidthType aType) { if (GetPrevInFlow()) return; // Already added. NS_PRECONDITION(aType == nsLayoutUtils::MIN_WIDTH || aType == nsLayoutUtils::PREF_WIDTH, "bad type"); PRUint8 startSide, endSide; if (GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR) { startSide = NS_SIDE_LEFT; endSide = NS_SIDE_RIGHT; } else { startSide = NS_SIDE_RIGHT; endSide = NS_SIDE_LEFT; } const nsStylePadding *stylePadding = GetStylePadding(); const nsStyleBorder *styleBorder = GetStyleBorder(); const nsStyleMargin *styleMargin = GetStyleMargin(); // This goes at the beginning no matter how things are broken and how // messy the bidi situations are, since per CSS2.1 section 8.6 // (implemented in bug 328168), the startSide border is always on the // first line. // This frame is a first-in-flow, but it might have a previous bidi // continuation, in which case that continuation should handle the startSide // border. if (!GetPrevContinuation()) { aData->currentLine += GetCoord(stylePadding->mPadding.Get(startSide), 0) + styleBorder->GetActualBorderWidth(startSide) + GetCoord(styleMargin->mMargin.Get(startSide), 0); } const nsLineList_iterator* savedLine = aData->line; nsIFrame* const savedLineContainer = aData->lineContainer; nsContainerFrame *lastInFlow; for (nsContainerFrame *nif = this; nif; nif = static_cast(nif->GetNextInFlow())) { for (nsIFrame *kid = nif->mFrames.FirstChild(); kid; kid = kid->GetNextSibling()) { if (aType == nsLayoutUtils::MIN_WIDTH) kid->AddInlineMinWidth(aRenderingContext, static_cast(aData)); else kid->AddInlinePrefWidth(aRenderingContext, static_cast(aData)); } // After we advance to our next-in-flow, the stored line and line container // may no longer be correct. Just forget them. aData->line = nsnull; aData->lineContainer = nsnull; lastInFlow = nif; } aData->line = savedLine; aData->lineContainer = savedLineContainer; // This goes at the end no matter how things are broken and how // messy the bidi situations are, since per CSS2.1 section 8.6 // (implemented in bug 328168), the endSide border is always on the // last line. // We reached the last-in-flow, but it might have a next bidi // continuation, in which case that continuation should handle // the endSide border. if (!lastInFlow->GetNextContinuation()) { aData->currentLine += GetCoord(stylePadding->mPadding.Get(endSide), 0) + styleBorder->GetActualBorderWidth(endSide) + GetCoord(styleMargin->mMargin.Get(endSide), 0); } } /* virtual */ nsSize nsContainerFrame::ComputeAutoSize(nsIRenderingContext *aRenderingContext, nsSize aCBSize, nscoord aAvailableWidth, nsSize aMargin, nsSize aBorder, nsSize aPadding, PRBool aShrinkWrap) { nsSize result(0xdeadbeef, NS_UNCONSTRAINEDSIZE); nscoord availBased = aAvailableWidth - aMargin.width - aBorder.width - aPadding.width; // replaced elements always shrink-wrap if (aShrinkWrap || IsFrameOfType(eReplaced)) { // don't bother setting it if the result won't be used if (GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Auto) { result.width = ShrinkWidthToFit(aRenderingContext, availBased); } } else { result.width = availBased; } return result; } /** * Invokes the WillReflow() function, positions the frame and its view (if * requested), and then calls Reflow(). If the reflow succeeds and the child * frame is complete, deletes any next-in-flows using DeleteNextInFlowChild() */ nsresult nsContainerFrame::ReflowChild(nsIFrame* aKidFrame, nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nscoord aX, nscoord aY, PRUint32 aFlags, nsReflowStatus& aStatus, nsOverflowContinuationTracker* aTracker) { NS_PRECONDITION(aReflowState.frame == aKidFrame, "bad reflow state"); nsresult result; // Send the WillReflow() notification, and position the child frame // and its view if requested aKidFrame->WillReflow(aPresContext); if (NS_FRAME_NO_MOVE_FRAME != (aFlags & NS_FRAME_NO_MOVE_FRAME)) { if ((aFlags & NS_FRAME_INVALIDATE_ON_MOVE) && !(aKidFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) && aKidFrame->GetPosition() != nsPoint(aX, aY)) { aKidFrame->InvalidateOverflowRect(); } aKidFrame->SetPosition(nsPoint(aX, aY)); } if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) { PositionFrameView(aKidFrame); } // Reflow the child frame result = aKidFrame->Reflow(aPresContext, aDesiredSize, aReflowState, aStatus); // If the reflow was successful and the child frame is complete, delete any // next-in-flows if (NS_SUCCEEDED(result) && NS_FRAME_IS_FULLY_COMPLETE(aStatus)) { nsIFrame* kidNextInFlow = aKidFrame->GetNextInFlow(); if (nsnull != kidNextInFlow) { // Remove all of the childs next-in-flows. Make sure that we ask // the right parent to do the removal (it's possible that the // parent is not this because we are executing pullup code) if (aTracker) aTracker->Finish(aKidFrame); static_cast(kidNextInFlow->GetParent()) ->DeleteNextInFlowChild(aPresContext, kidNextInFlow, PR_TRUE); } } return result; } /** * Position the views of |aFrame|'s descendants. A container frame * should call this method if it moves a frame after |Reflow|. */ void nsContainerFrame::PositionChildViews(nsIFrame* aFrame) { if (!(aFrame->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)) { return; } nsIAtom* childListName = nsnull; PRInt32 childListIndex = 0; do { // Recursively walk aFrame's child frames nsIFrame* childFrame = aFrame->GetFirstChild(childListName); while (childFrame) { // Position the frame's view (if it has one) otherwise recursively // process its children if (childFrame->HasView()) { PositionFrameView(childFrame); } else { PositionChildViews(childFrame); } // Get the next sibling child frame childFrame = childFrame->GetNextSibling(); } // also process the additional child lists, but skip the popup list as the // view for popups is managed by the parent. Currently only nsMenuFrame // has a popupList and during layout will call nsMenuPopupFrame::AdjustView. do { childListName = aFrame->GetAdditionalChildListName(childListIndex++); } while (childListName == nsGkAtoms::popupList); } while (childListName); } /** * The second half of frame reflow. Does the following: * - sets the frame's bounds * - sizes and positions (if requested) the frame's view. If the frame's final * position differs from the current position and the frame itself does not * have a view, then any child frames with views are positioned so they stay * in sync * - sets the view's visibility, opacity, content transparency, and clip * - invoked the DidReflow() function * * Flags: * NS_FRAME_NO_MOVE_FRAME - don't move the frame. aX and aY are ignored in this * case. Also implies NS_FRAME_NO_MOVE_VIEW * NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you * don't want to automatically sync the frame and view * NS_FRAME_NO_SIZE_VIEW - don't size the frame's view */ nsresult nsContainerFrame::FinishReflowChild(nsIFrame* aKidFrame, nsPresContext* aPresContext, const nsHTMLReflowState* aReflowState, const nsHTMLReflowMetrics& aDesiredSize, nscoord aX, nscoord aY, PRUint32 aFlags) { nsPoint curOrigin = aKidFrame->GetPosition(); nsRect bounds(aX, aY, aDesiredSize.width, aDesiredSize.height); aKidFrame->SetRect(bounds); if (aKidFrame->HasView()) { nsIView* view = aKidFrame->GetView(); // Make sure the frame's view is properly sized and positioned and has // things like opacity correct SyncFrameViewAfterReflow(aPresContext, aKidFrame, view, &aDesiredSize.mOverflowArea, aFlags); } if (!(aFlags & NS_FRAME_NO_MOVE_VIEW) && (curOrigin.x != aX || curOrigin.y != aY)) { if (!aKidFrame->HasView()) { // If the frame has moved, then we need to make sure any child views are // correctly positioned PositionChildViews(aKidFrame); } // We also need to redraw everything associated with the frame // because if the frame's Reflow issued any invalidates, then they // will be at the wrong offset ... note that this includes // invalidates issued against the frame's children, so we need to // invalidate the overflow area too. aKidFrame->Invalidate(aDesiredSize.mOverflowArea); } return aKidFrame->DidReflow(aPresContext, aReflowState, NS_FRAME_REFLOW_FINISHED); } nsresult nsContainerFrame::ReflowOverflowContainerChildren(nsPresContext* aPresContext, const nsHTMLReflowState& aReflowState, nsRect& aOverflowRect, PRUint32 aFlags, nsReflowStatus& aStatus) { NS_PRECONDITION(aPresContext, "null pointer"); nsresult rv = NS_OK; nsFrameList* overflowContainers = GetPropTableFrames(aPresContext, nsGkAtoms::overflowContainersProperty); NS_ASSERTION(!(overflowContainers && GetPrevInFlow() && static_cast(GetPrevInFlow()) ->GetPropTableFrames(aPresContext, nsGkAtoms::excessOverflowContainersProperty)), "conflicting overflow containers lists"); if (!overflowContainers) { // Drain excess from previnflow nsContainerFrame* prev = (nsContainerFrame*) GetPrevInFlow(); if (prev) { nsFrameList* excessFrames = prev->RemovePropTableFrames(aPresContext, nsGkAtoms::excessOverflowContainersProperty); if (excessFrames) { nsFrameList reparenter; reparenter.InsertFrames(this, nsnull, excessFrames->FirstChild()); nsHTMLContainerFrame::ReparentFrameViewList(aPresContext, excessFrames->FirstChild(), prev, this); overflowContainers = excessFrames; rv = SetPropTableFrames(aPresContext, overflowContainers, nsGkAtoms::overflowContainersProperty); if (NS_FAILED(rv)) { excessFrames->DestroyFrames(); delete excessFrames; return rv; } } } } if (!overflowContainers) return NS_OK; // nothing to reflow nsOverflowContinuationTracker tracker(aPresContext, this, PR_FALSE, PR_FALSE); for (nsIFrame* frame = overflowContainers->FirstChild(); frame; frame = frame->GetNextSibling()) { if (frame->GetPrevInFlow()->GetParent() != GetPrevInFlow()) { // frame's prevInFlow has moved, skip reflowing this frame; // it will get reflowed once it's been placed continue; } if (NS_SUBTREE_DIRTY(frame)) { // Get prev-in-flow nsIFrame* prevInFlow = frame->GetPrevInFlow(); NS_ASSERTION(prevInFlow, "overflow container frame must have a prev-in-flow"); NS_ASSERTION(frame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER, "overflow container frame must have overflow container bit set"); nsRect prevRect = prevInFlow->GetRect(); // Initialize reflow params nsSize availSpace(prevRect.width, aReflowState.availableHeight); nsHTMLReflowMetrics desiredSize; nsHTMLReflowState frameState(aPresContext, aReflowState, frame, availSpace); nsReflowStatus frameStatus = NS_FRAME_COMPLETE; // Cache old bounds nsRect oldRect = frame->GetRect(); nsRect oldOverflow = frame->GetOverflowRect(); // Reflow rv = ReflowChild(frame, aPresContext, desiredSize, frameState, prevRect.x, 0, aFlags, frameStatus, &tracker); NS_ENSURE_SUCCESS(rv, rv); //XXXfr Do we need to override any shrinkwrap effects here? // e.g. desiredSize.width = prevRect.width; rv = FinishReflowChild(frame, aPresContext, &frameState, desiredSize, prevRect.x, 0, aFlags); NS_ENSURE_SUCCESS(rv, rv); // Invalidate if there was a position or size change nsRect rect = frame->GetRect(); if (rect != oldRect) { nsRect dirtyRect = oldOverflow; dirtyRect.MoveBy(oldRect.x, oldRect.y); Invalidate(dirtyRect); dirtyRect = frame->GetOverflowRect(); dirtyRect.MoveBy(rect.x, rect.y); Invalidate(dirtyRect); } // Handle continuations if (!NS_FRAME_IS_FULLY_COMPLETE(frameStatus)) { if (frame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { // Abspos frames can't cause their parent to be incomplete, // only overflow incomplete. NS_FRAME_SET_OVERFLOW_INCOMPLETE(frameStatus); } else { NS_ASSERTION(NS_FRAME_IS_COMPLETE(frameStatus), "overflow container frames can't be incomplete, only overflow-incomplete"); } // Acquire a next-in-flow, creating it if necessary nsIFrame* nif = frame->GetNextInFlow(); if (!nif) { rv = nsHTMLContainerFrame::CreateNextInFlow(aPresContext, this, frame, nif); NS_ENSURE_SUCCESS(rv, rv); NS_ASSERTION(frameStatus & NS_FRAME_REFLOW_NEXTINFLOW, "Someone forgot a REFLOW_NEXTINFLOW flag"); frame->SetNextSibling(nif->GetNextSibling()); nif->SetNextSibling(nsnull); } else if (!(nif->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) { // used to be a normal next-in-flow; steal it from the child list rv = static_cast(nif->GetParent()) ->StealFrame(aPresContext, nif); NS_ENSURE_SUCCESS(rv, rv); } tracker.Insert(nif, frameStatus); } NS_MergeReflowStatusInto(&aStatus, frameStatus); // At this point it would be nice to assert !frame->GetOverflowRect().IsEmpty(), // but we have some unsplittable frames that, when taller than // availableHeight will push zero-height content into a next-in-flow. } else { tracker.Skip(frame, aStatus); if (aReflowState.mFloatManager) nsBlockFrame::RecoverFloatsFor(frame, *aReflowState.mFloatManager); } ConsiderChildOverflow(aOverflowRect, frame); } return NS_OK; } void nsContainerFrame::DisplayOverflowContainers(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsFrameList* overflowconts = GetPropTableFrames(PresContext(), nsGkAtoms::overflowContainersProperty); if (overflowconts) { for (nsIFrame* frame = overflowconts->FirstChild(); frame; frame = frame->GetNextSibling()) { BuildDisplayListForChild(aBuilder, frame, aDirtyRect, aLists); } } } nsresult nsContainerFrame::StealFrame(nsPresContext* aPresContext, nsIFrame* aChild, PRBool aForceNormal) { PRBool removed = PR_TRUE; if ((aChild->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) && !aForceNormal) { // Try removing from the overflow container list if (!RemovePropTableFrame(aPresContext, aChild, nsGkAtoms::overflowContainersProperty)) { // It must be in the excess overflow container list removed = RemovePropTableFrame(aPresContext, aChild, nsGkAtoms::excessOverflowContainersProperty); } } else { if (!mFrames.RemoveFrame(aChild)) { // We didn't find the child in the parent's principal child list. // Maybe it's on the overflow list? nsFrameList* frameList = GetOverflowFrames(); if (frameList) { removed = frameList->RemoveFrame(aChild); if (frameList->IsEmpty()) { DestroyOverflowList(aPresContext); } } } } return (removed) ? NS_OK : NS_ERROR_UNEXPECTED; } void nsContainerFrame::DestroyOverflowList(nsPresContext* aPresContext) { nsFrameList* list = RemovePropTableFrames(aPresContext, nsGkAtoms::overflowProperty); if (list) list->Destroy(); } /** * Remove and delete aNextInFlow and its next-in-flows. Updates the sibling and flow * pointers */ void nsContainerFrame::DeleteNextInFlowChild(nsPresContext* aPresContext, nsIFrame* aNextInFlow, PRBool aDeletingEmptyFrames) { #ifdef DEBUG nsIFrame* prevInFlow = aNextInFlow->GetPrevInFlow(); #endif NS_PRECONDITION(prevInFlow, "bad prev-in-flow"); // If the next-in-flow has a next-in-flow then delete it, too (and // delete it first). // Do this in a loop so we don't overflow the stack for frames // with very many next-in-flows nsIFrame* nextNextInFlow = aNextInFlow->GetNextInFlow(); if (nextNextInFlow) { nsAutoTArray frames; for (nsIFrame* f = nextNextInFlow; f; f = f->GetNextInFlow()) { frames.AppendElement(f); } for (PRInt32 i = frames.Length() - 1; i >= 0; --i) { nsIFrame* delFrame = frames.ElementAt(i); static_cast(delFrame->GetParent()) ->DeleteNextInFlowChild(aPresContext, delFrame, aDeletingEmptyFrames); } } aNextInFlow->Invalidate(aNextInFlow->GetOverflowRect()); // Take the next-in-flow out of the parent's child list #ifdef DEBUG nsresult rv = #endif StealFrame(aPresContext, aNextInFlow); NS_ASSERTION(NS_SUCCEEDED(rv), "StealFrame failure"); // Delete the next-in-flow frame and its descendants. This will also // remove it from its next-in-flow/prev-in-flow chain. aNextInFlow->Destroy(); NS_POSTCONDITION(!prevInFlow->GetNextInFlow(), "non null next-in-flow"); } // Destructor function for the proptable-stored framelists static void DestroyFrameList(void* aFrame, nsIAtom* aPropertyName, void* aPropertyValue, void* aDtorData) { if (aPropertyValue) static_cast(aPropertyValue)->Destroy(); } /** * Set the frames on the overflow list */ nsresult nsContainerFrame::SetOverflowFrames(nsPresContext* aPresContext, const nsFrameList& aOverflowFrames) { NS_PRECONDITION(aOverflowFrames.NotEmpty(), "Shouldn't be called"); nsFrameList* newList = new nsFrameList(aOverflowFrames); if (!newList) { // XXXbz should really destroy the frames here, but callers are holding // pointers to them.... We should switch all callers to framelists, then // audit and do that. return NS_ERROR_OUT_OF_MEMORY; } nsresult rv = aPresContext->PropertyTable()->SetProperty(this, nsGkAtoms::overflowProperty, newList, DestroyFrameList, nsnull); if (NS_FAILED(rv)) { newList->Destroy(); } // Verify that we didn't overwrite an existing overflow list NS_ASSERTION(rv != NS_PROPTABLE_PROP_OVERWRITTEN, "existing overflow list"); return rv; } nsFrameList* nsContainerFrame::GetPropTableFrames(nsPresContext* aPresContext, nsIAtom* aPropID) const { nsPropertyTable* propTable = aPresContext->PropertyTable(); return static_cast(propTable->GetProperty(this, aPropID)); } nsFrameList* nsContainerFrame::RemovePropTableFrames(nsPresContext* aPresContext, nsIAtom* aPropID) const { nsPropertyTable* propTable = aPresContext->PropertyTable(); return static_cast(propTable->UnsetProperty(this, aPropID)); } PRBool nsContainerFrame::RemovePropTableFrame(nsPresContext* aPresContext, nsIFrame* aFrame, nsIAtom* aPropID) const { nsFrameList* frameList = RemovePropTableFrames(aPresContext, aPropID); if (!frameList) { // No such list return PR_FALSE; } if (!frameList->RemoveFrame(aFrame)) { // Found list, but it doesn't have the frame. Put list back. SetPropTableFrames(aPresContext, frameList, aPropID); return PR_FALSE; } if (frameList->IsEmpty()) { // Removed frame and now list is empty. Delete it. delete frameList; } else { // Removed frame, but list not empty. Put it back. SetPropTableFrames(aPresContext, frameList, aPropID); } return PR_TRUE; } nsresult nsContainerFrame::SetPropTableFrames(nsPresContext* aPresContext, nsFrameList* aFrameList, nsIAtom* aPropID) const { NS_PRECONDITION(aPresContext && aPropID && aFrameList, "null ptr"); nsresult rv = aPresContext->PropertyTable()->SetProperty(this, aPropID, aFrameList, DestroyFrameList, nsnull); NS_ASSERTION(rv != NS_PROPTABLE_PROP_OVERWRITTEN, "existing framelist"); return rv; } /** * Push aFromChild and its next siblings to the next-in-flow. Change the * geometric parent of each frame that's pushed. If there is no next-in-flow * the frames are placed on the overflow list (and the geometric parent is * left unchanged). * * Updates the next-in-flow's child count. Does not update the * pusher's child count. * * @param aFromChild the first child frame to push. It is disconnected from * aPrevSibling * @param aPrevSibling aFromChild's previous sibling. Must not be null. It's * an error to push a parent's first child frame */ void nsContainerFrame::PushChildren(nsPresContext* aPresContext, nsIFrame* aFromChild, nsIFrame* aPrevSibling) { NS_PRECONDITION(nsnull != aFromChild, "null pointer"); NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child"); NS_PRECONDITION(aPrevSibling->GetNextSibling() == aFromChild, "bad prev sibling"); // Disconnect aFromChild from its previous sibling aPrevSibling->SetNextSibling(nsnull); if (nsnull != GetNextInFlow()) { // XXX This is not a very good thing to do. If it gets removed // then remove the copy of this routine that doesn't do this from // nsInlineFrame. nsContainerFrame* nextInFlow = (nsContainerFrame*)GetNextInFlow(); // When pushing and pulling frames we need to check for whether any // views need to be reparented. for (nsIFrame* f = aFromChild; f; f = f->GetNextSibling()) { nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, this, nextInFlow); } nextInFlow->mFrames.InsertFrames(nextInFlow, nsnull, aFromChild); } else { // Add the frames to our overflow list SetOverflowFrames(aPresContext, aFromChild); } } /** * Moves any frames on the overflow lists (the prev-in-flow's overflow list and * the receiver's overflow list) to the child list. * * Updates this frame's child count and content mapping. * * @return PR_TRUE if any frames were moved and PR_FALSE otherwise */ PRBool nsContainerFrame::MoveOverflowToChildList(nsPresContext* aPresContext) { PRBool result = PR_FALSE; // Check for an overflow list with our prev-in-flow nsContainerFrame* prevInFlow = (nsContainerFrame*)GetPrevInFlow(); if (nsnull != prevInFlow) { nsAutoPtr prevOverflowFrames(prevInFlow->StealOverflowFrames()); if (prevOverflowFrames) { // Tables are special; they can have repeated header/footer // frames on mFrames at this point. NS_ASSERTION(mFrames.IsEmpty() || GetType() == nsGkAtoms::tableFrame, "bad overflow list"); // When pushing and pulling frames we need to check for whether any // views need to be reparented. nsHTMLContainerFrame::ReparentFrameViewList(aPresContext, *prevOverflowFrames, prevInFlow, this); mFrames.AppendFrames(this, *prevOverflowFrames); result = PR_TRUE; } } // It's also possible that we have an overflow list for ourselves nsAutoPtr overflowFrames(StealOverflowFrames()); if (overflowFrames) { NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames"); mFrames.AppendFrames(nsnull, *overflowFrames); result = PR_TRUE; } return result; } nsOverflowContinuationTracker::nsOverflowContinuationTracker(nsPresContext* aPresContext, nsContainerFrame* aFrame, PRBool aWalkOOFFrames, PRBool aSkipOverflowContainerChildren) : mOverflowContList(nsnull), mPrevOverflowCont(nsnull), mSentry(nsnull), mParent(aFrame), mSkipOverflowContainerChildren(aSkipOverflowContainerChildren), mWalkOOFFrames(aWalkOOFFrames) { NS_PRECONDITION(aFrame, "null frame pointer"); nsContainerFrame* next = static_cast (aFrame->GetNextInFlow()); if (next) { mOverflowContList = next->GetPropTableFrames(aPresContext, nsGkAtoms::overflowContainersProperty); if (mOverflowContList) { mParent = next; SetUpListWalker(); } } if (!mOverflowContList) { mOverflowContList = mParent->GetPropTableFrames(aPresContext, nsGkAtoms::excessOverflowContainersProperty); if (mOverflowContList) { SetUpListWalker(); } } } /** * Helper function to walk past overflow continuations whose prev-in-flow * isn't a normal child and to set mSentry and mPrevOverflowCont correctly. */ void nsOverflowContinuationTracker::SetUpListWalker() { NS_ASSERTION(!mSentry && !mPrevOverflowCont, "forgot to reset mSentry or mPrevOverflowCont"); if (mOverflowContList) { nsIFrame* cur = mOverflowContList->FirstChild(); if (mSkipOverflowContainerChildren) { while (cur && (cur->GetPrevInFlow()->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) { mPrevOverflowCont = cur; cur = cur->GetNextSibling(); } while (cur && (!(cur->GetStateBits() & NS_FRAME_OUT_OF_FLOW) == mWalkOOFFrames)) { mPrevOverflowCont = cur; cur = cur->GetNextSibling(); } } if (cur) { mSentry = cur->GetPrevInFlow(); } } } /** * Helper function to step forward through the overflow continuations list. * Sets mSentry and mPrevOverflowCont, skipping over OOF or non-OOF frames * as appropriate. May only be called when we have already set up an * mOverflowContList; mOverflowContList cannot be null. */ void nsOverflowContinuationTracker::StepForward() { NS_PRECONDITION(mOverflowContList, "null list"); // Step forward if (mPrevOverflowCont) { mPrevOverflowCont = mPrevOverflowCont->GetNextSibling(); } else { mPrevOverflowCont = mOverflowContList->FirstChild(); } // Skip over oof or non-oof frames as appropriate if (mSkipOverflowContainerChildren) { nsIFrame* cur = mPrevOverflowCont->GetNextSibling(); while (cur && (!(cur->GetStateBits() & NS_FRAME_OUT_OF_FLOW) == mWalkOOFFrames)) { mPrevOverflowCont = cur; cur = cur->GetNextSibling(); } } // Set up the sentry mSentry = (mPrevOverflowCont->GetNextSibling()) ? mPrevOverflowCont->GetNextSibling()->GetPrevInFlow() : nsnull; } nsresult nsOverflowContinuationTracker::Insert(nsIFrame* aOverflowCont, nsReflowStatus& aReflowStatus) { NS_PRECONDITION(aOverflowCont, "null frame pointer"); NS_PRECONDITION(!mSkipOverflowContainerChildren || mWalkOOFFrames == !!(aOverflowCont->GetStateBits() & NS_FRAME_OUT_OF_FLOW), "shouldn't insert frame that doesn't match walker type"); NS_PRECONDITION(aOverflowCont->GetPrevInFlow(), "overflow containers must have a prev-in-flow"); nsresult rv = NS_OK; PRBool convertedToOverflowContainer = PR_FALSE; nsPresContext* presContext = aOverflowCont->PresContext(); if (!mSentry || aOverflowCont != mSentry->GetNextInFlow()) { // Not in our list, so we need to add it if (aOverflowCont->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) { // aOverflowCont is in some other overflow container list, // steal it first NS_ASSERTION(!(mOverflowContList && mOverflowContList->ContainsFrame(aOverflowCont)), "overflow containers out of order"); rv = static_cast(aOverflowCont->GetParent()) ->StealFrame(presContext, aOverflowCont); NS_ENSURE_SUCCESS(rv, rv); } else { aOverflowCont->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER); convertedToOverflowContainer = PR_TRUE; } if (!mOverflowContList) { mOverflowContList = new nsFrameList(); rv = mParent->SetPropTableFrames(presContext, mOverflowContList, nsGkAtoms::excessOverflowContainersProperty); NS_ENSURE_SUCCESS(rv, rv); SetUpListWalker(); } if (aOverflowCont->GetParent() != mParent) { nsHTMLContainerFrame::ReparentFrameView(presContext, aOverflowCont, aOverflowCont->GetParent(), mParent); } mOverflowContList->InsertFrame(mParent, mPrevOverflowCont, aOverflowCont); aReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW; } // If we need to reflow it, mark it dirty if (aReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) aOverflowCont->AddStateBits(NS_FRAME_IS_DIRTY); // It's in our list, just step forward StepForward(); NS_ASSERTION(mPrevOverflowCont == aOverflowCont || (mSkipOverflowContainerChildren && (mPrevOverflowCont->GetStateBits() & NS_FRAME_OUT_OF_FLOW) != (aOverflowCont->GetStateBits() & NS_FRAME_OUT_OF_FLOW)), "OverflowContTracker in unexpected state"); if (convertedToOverflowContainer) { // Convert all non-overflow-container continuations of aOverflowCont // into overflow containers and move them to our overflow // tracker. This preserves the invariant that the next-continuations // of an overflow container are also overflow containers. nsIFrame* f = aOverflowCont->GetNextContinuation(); if (f && !(f->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) { nsContainerFrame* parent = static_cast(f->GetParent()); rv = parent->StealFrame(presContext, f); NS_ENSURE_SUCCESS(rv, rv); Insert(f, aReflowStatus); } } return rv; } void nsOverflowContinuationTracker::Finish(nsIFrame* aChild) { NS_PRECONDITION(aChild, "null ptr"); NS_PRECONDITION(aChild->GetNextInFlow(), "supposed to call Finish *before* deleting next-in-flow!"); for (nsIFrame* f = aChild; f; f = f->GetNextInFlow()) { if (f == mSentry) { // Make sure we drop all references if this was the only frame // in the overflow containers list if (mOverflowContList->FirstChild() == f->GetNextInFlow() && !f->GetNextInFlow()->GetNextSibling()) { mOverflowContList = nsnull; mPrevOverflowCont = nsnull; mSentry = nsnull; mParent = static_cast(f->GetParent()); break; } else { // Step past aChild nsIFrame* prevOverflowCont = mPrevOverflowCont; StepForward(); if (mPrevOverflowCont == f->GetNextInFlow()) { // Pull mPrevOverflowChild back to aChild's prevSibling: // aChild will be removed from our list by our caller mPrevOverflowCont = prevOverflowCont; } } } } } ///////////////////////////////////////////////////////////////////////////// // Debugging #ifdef NS_DEBUG NS_IMETHODIMP nsContainerFrame::List(FILE* out, PRInt32 aIndent) const { IndentBy(out, aIndent); ListTag(out); #ifdef DEBUG_waterson fprintf(out, " [parent=%p]", static_cast(mParent)); #endif if (HasView()) { fprintf(out, " [view=%p]", static_cast(GetView())); } if (nsnull != mNextSibling) { fprintf(out, " next=%p", static_cast(mNextSibling)); } if (nsnull != GetPrevContinuation()) { fprintf(out, " prev-continuation=%p", static_cast(GetPrevContinuation())); } if (nsnull != GetNextContinuation()) { fprintf(out, " next-continuation=%p", static_cast(GetNextContinuation())); } fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height); if (0 != mState) { fprintf(out, " [state=%08x]", mState); } fprintf(out, " [content=%p]", static_cast(mContent)); nsContainerFrame* f = const_cast(this); if (f->HasOverflowRect()) { nsRect overflowArea = f->GetOverflowRect(); fprintf(out, " [overflow=%d,%d,%d,%d]", overflowArea.x, overflowArea.y, overflowArea.width, overflowArea.height); } fprintf(out, " [sc=%p]", static_cast(mStyleContext)); nsIAtom* pseudoTag = mStyleContext->GetPseudoType(); if (pseudoTag) { nsAutoString atomString; pseudoTag->ToString(atomString); fprintf(out, " pst=%s", NS_LossyConvertUTF16toASCII(atomString).get()); } // Output the children nsIAtom* listName = nsnull; PRInt32 listIndex = 0; PRBool outputOneList = PR_FALSE; do { nsIFrame* kid = GetFirstChild(listName); if (nsnull != kid) { if (outputOneList) { IndentBy(out, aIndent); } outputOneList = PR_TRUE; nsAutoString tmp; if (nsnull != listName) { listName->ToString(tmp); fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out); } fputs("<\n", out); while (nsnull != kid) { // Verify the child frame's parent frame pointer is correct NS_ASSERTION(kid->GetParent() == (nsIFrame*)this, "bad parent frame pointer"); // Have the child frame list kid->List(out, aIndent + 1); kid = kid->GetNextSibling(); } IndentBy(out, aIndent); fputs(">\n", out); } listName = GetAdditionalChildListName(listIndex++); } while(nsnull != listName); if (!outputOneList) { fputs("<>\n", out); } return NS_OK; } #endif