/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * The contents of this file are subject to the Netscape 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/NPL/ * * 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 Communicator client code. * * The Initial Developer of the Original Code is Netscape Communications * Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): */ #include "nsCOMPtr.h" #include "nsInlineFrame.h" #include "nsHTMLIIDs.h" #include "nsHTMLAtoms.h" #include "nsHTMLParts.h" #include "nsIStyleContext.h" #include "nsIPresShell.h" #include "nsIPresContext.h" #include "nsIRenderingContext.h" #include "nsIFontMetrics.h" #include "nsAbsoluteContainingBlock.h" #include "nsLayoutAtoms.h" #ifdef DEBUG #undef NOISY_PUSHING #endif nsIID nsInlineFrame::kInlineFrameCID = NS_INLINE_FRAME_CID; ////////////////////////////////////////////////////////////////////// // Basic nsInlineFrame methods nsresult NS_NewInlineFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame) { NS_PRECONDITION(aNewFrame, "null OUT ptr"); if (nsnull == aNewFrame) { return NS_ERROR_NULL_POINTER; } nsInlineFrame* it = new (aPresShell) nsInlineFrame; if (nsnull == it) { return NS_ERROR_OUT_OF_MEMORY; } *aNewFrame = it; return NS_OK; } nsInlineFrame::nsInlineFrame() { } NS_IMETHODIMP nsInlineFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr) { if (nsnull == aInstancePtr) { return NS_ERROR_NULL_POINTER; } if (aIID.Equals(kInlineFrameCID)) { nsInlineFrame* tmp = this; *aInstancePtr = (void*) tmp; return NS_OK; } return nsInlineFrameSuper::QueryInterface(aIID, aInstancePtr); } #ifdef DEBUG NS_IMETHODIMP nsInlineFrame::GetFrameName(nsString& aResult) const { return MakeFrameName("Inline", aResult); } #endif NS_IMETHODIMP nsInlineFrame::GetFrameType(nsIAtom** aType) const { NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer"); *aType = nsLayoutAtoms::inlineFrame; NS_ADDREF(*aType); return NS_OK; } NS_IMETHODIMP nsInlineFrame::AppendFrames(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aFrameList) { if (nsnull != aListName) { return NS_ERROR_INVALID_ARG; } if (aFrameList) { mFrames.AppendFrames(this, aFrameList); // Ask the parent frame to reflow me. ReflowDirtyChild(&aPresShell, nsnull); } return NS_OK; } NS_IMETHODIMP nsInlineFrame::InsertFrames(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aPrevFrame, nsIFrame* aFrameList) { if (nsnull != aListName) { #ifdef IBMBIDI if (aListName != nsLayoutAtoms::nextBidi) #endif return NS_ERROR_INVALID_ARG; } if (aFrameList) { // Insert frames after aPrevFrame mFrames.InsertFrames(this, aPrevFrame, aFrameList); #ifdef IBMBIDI if (nsnull == aListName) #endif // Ask the parent frame to reflow me. ReflowDirtyChild(&aPresShell, nsnull); } return NS_OK; } NS_IMETHODIMP nsInlineFrame::RemoveFrame(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aOldFrame) { if (nsnull != aListName) { #ifdef IBMBIDI if (nsLayoutAtoms::nextBidi != aListName) #endif return NS_ERROR_INVALID_ARG; } if (aOldFrame) { // Loop and destroy the frame and all of its continuations. PRBool generateReflowCommand = PR_FALSE; nsIFrame* oldFrameParent; aOldFrame->GetParent(&oldFrameParent); nsInlineFrame* parent = (nsInlineFrame*) oldFrameParent; while (nsnull != aOldFrame) { #ifdef IBMBIDI if (nsLayoutAtoms::nextBidi != aListName) { #endif // If the frame being removed has zero size then don't bother // generating a reflow command, otherwise make sure we do. nsRect bbox; aOldFrame->GetRect(bbox); if (bbox.width || bbox.height) { generateReflowCommand = PR_TRUE; } #ifdef IBMBIDI } #endif // 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* oldFrameNextInFlow; aOldFrame->GetNextInFlow(&oldFrameNextInFlow); nsSplittableType st; aOldFrame->IsSplittable(st); if (NS_FRAME_NOT_SPLITTABLE != st) { nsSplittableFrame::RemoveFromFlow(aOldFrame); } parent->mFrames.DestroyFrame(aPresContext, aOldFrame); aOldFrame = oldFrameNextInFlow; if (nsnull != aOldFrame) { aOldFrame->GetParent((nsIFrame**) &parent); } } if (generateReflowCommand) { // Ask the parent frame to reflow me. ReflowDirtyChild(&aPresShell, nsnull); } } return NS_OK; } NS_IMETHODIMP nsInlineFrame::ReplaceFrame(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aOldFrame, nsIFrame* aNewFrame) { if (nsnull != aListName) { return NS_ERROR_INVALID_ARG; } if (!aOldFrame || !aNewFrame) { return NS_ERROR_INVALID_ARG; } // Replace the old frame with the new frame in the list, then remove the old frame mFrames.ReplaceFrame(this, aOldFrame, aNewFrame); aOldFrame->Destroy(aPresContext); // Ask the parent frame to reflow me. ReflowDirtyChild(&aPresShell, nsnull); return NS_OK; } ////////////////////////////////////////////////////////////////////// // Reflow methods NS_IMETHODIMP nsInlineFrame::Reflow(nsIPresContext* aPresContext, nsHTMLReflowMetrics& aMetrics, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { DO_GLOBAL_REFLOW_COUNT("nsInlineFrame", aReflowState.reason); if (nsnull == aReflowState.mLineLayout) { return NS_ERROR_INVALID_ARG; } PRBool lazilySetParentPointer = PR_FALSE; // Check for an overflow list with our prev-in-flow nsInlineFrame* prevInFlow = (nsInlineFrame*)mPrevInFlow; if (nsnull != prevInFlow) { nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext, PR_TRUE); if (prevOverflowFrames) { // When pushing and pulling frames we need to check for whether any // views need to be reparented. nsHTMLContainerFrame::ReparentFrameViewList(aPresContext, prevOverflowFrames, prevInFlow, this); if (aReflowState.reason == eReflowReason_Initial) { // If it's the initial reflow, then our child list must be empty, so // just set the child list rather than calling InsertFrame(). This avoids // having to get the last child frame in the list. // Note that we don't set the parent pointer for the new frames. Instead wait // to do this until we actually reflow the frame. If the overflow list contains // thousands of frames this is a big performance issue (see bug #5588) NS_ASSERTION(mFrames.IsEmpty(), "child list is not empty for initial reflow"); mFrames.SetFrames(prevOverflowFrames); lazilySetParentPointer = PR_TRUE; } else { // Insert the new frames at the beginning of the child list // and set their parent pointer mFrames.InsertFrames(this, nsnull, prevOverflowFrames); } } } // It's also possible that we have an overflow list for ourselves #ifdef DEBUG if (aReflowState.reason == eReflowReason_Initial) { // If it's our initial reflow, then we should not have an overflow list. // However, add an assertion in case we get reflowed more than once with // the initial reflow reason nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_FALSE); NS_ASSERTION(!overflowFrames, "overflow list is not empty for initial reflow"); } #endif if (aReflowState.reason != eReflowReason_Initial) { nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE); if (overflowFrames) { NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames"); // Because we lazily set the parent pointer of child frames we get from // our prev-in-flow's overflow list, it's possible that we have not set // the parent pointer for these frames. Check the first frame to see, and // if we haven't set the parent pointer then set it now nsIFrame* parent; overflowFrames->GetParent(&parent); mFrames.AppendFrames(parent == this ? nsnull : this, overflowFrames); } } if (IsFrameTreeTooDeep(aReflowState, aMetrics)) { #ifdef DEBUG_kipp { extern char* nsPresShell_ReflowStackPointerTop; char marker; char* newsp = (char*) ▮ printf("XXX: frame tree is too deep; approx stack size = %d\n", nsPresShell_ReflowStackPointerTop - newsp); } #endif aStatus = NS_FRAME_COMPLETE; return NS_OK; } // Set our own reflow state (additional state above and beyond // aReflowState) InlineReflowState irs; irs.mPrevFrame = nsnull; irs.mNextInFlow = (nsInlineFrame*) mNextInFlow; irs.mNextRCFrame = nsnull; irs.mSetParentPointer = lazilySetParentPointer; if (eReflowReason_Incremental == aReflowState.reason) { // Peel off the next frame in the path if this is an incremental // reflow aimed at one of the children. nsIFrame* target; aReflowState.reflowCommand->GetTarget(target); if (this != target) { aReflowState.reflowCommand->GetNext(irs.mNextRCFrame); } } nsresult rv; if (mFrames.IsEmpty()) { // Try to pull over one frame before starting so that we know // whether we have an anonymous block or not. PRBool complete; (void) PullOneFrame(aPresContext, irs, &complete); } rv = ReflowFrames(aPresContext, aReflowState, irs, aMetrics, aStatus); // Note: the line layout code will properly compute our // NS_FRAME_OUTSIDE_CHILDREN state for us. return rv; } NS_IMETHODIMP nsInlineFrame::CanContinueTextRun(PRBool& aContinueTextRun) const { // We can continue a text run through an inline frame aContinueTextRun = PR_TRUE; return NS_OK; } NS_IMETHODIMP nsInlineFrame::ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild) { // The inline container frame does not handle the reflow // request. It passes it up to its parent container. // If you don't already have dirty children, if (!(mState & NS_FRAME_HAS_DIRTY_CHILDREN)) { if (mParent) { // Record that you are dirty and have dirty children mState |= NS_FRAME_IS_DIRTY; mState |= NS_FRAME_HAS_DIRTY_CHILDREN; // Pass the reflow request up to the parent mParent->ReflowDirtyChild(aPresShell, (nsIFrame*) this); } else { NS_ASSERTION(0, "No parent to pass the reflow request up to."); } } return NS_OK; } nsresult nsInlineFrame::ReflowFrames(nsIPresContext* aPresContext, const nsHTMLReflowState& aReflowState, InlineReflowState& irs, nsHTMLReflowMetrics& aMetrics, nsReflowStatus& aStatus) { nsresult rv = NS_OK; aStatus = NS_FRAME_COMPLETE; nsLineLayout* lineLayout = aReflowState.mLineLayout; nscoord leftEdge = 0; if (nsnull == mPrevInFlow) { leftEdge = aReflowState.mComputedBorderPadding.left; } nscoord availableWidth = aReflowState.availableWidth; if (NS_UNCONSTRAINEDSIZE != availableWidth) { // Subtract off left and right border+padding from availableWidth availableWidth -= leftEdge; availableWidth -= aReflowState.mComputedBorderPadding.right; } lineLayout->BeginSpan(this, &aReflowState, leftEdge, leftEdge + availableWidth); // First reflow our current children nsIFrame* frame = mFrames.FirstChild(); PRBool done = PR_FALSE; while (nsnull != frame) { PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK(); // Check if we should lazily set the child frame's parent pointer if (irs.mSetParentPointer) { frame->SetParent(this); // We also need to check if frame has a next-in-flow. It it does, then set // its parent frame pointer, too. Otherwise, if we reflow frame and it's // complete we'll fail when deleting its next-in-flow which is no longer // needed. This scenario doesn't happen often, but it can happen nsIFrame* nextInFlow; frame->GetNextInFlow(&nextInFlow); while (nextInFlow) { // Since we only do lazy setting of parent pointers for the frame's // initial reflow, this frame can't have a next-in-flow. That means // the continuing child frame must be in our child list as well. If // not, then something is wrong NS_ASSERTION(mFrames.ContainsFrame(nextInFlow), "unexpected flow"); nextInFlow->SetParent(this); nextInFlow->GetNextInFlow(&nextInFlow); } } rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus); if (NS_FAILED(rv)) { done = PR_TRUE; break; } if (NS_FRAME_COMPLETE != aStatus) { if (!reflowingFirstLetter || NS_INLINE_IS_BREAK(aStatus)) { done = PR_TRUE; break; } } irs.mPrevFrame = frame; frame->GetNextSibling(&frame); } // Attempt to pull frames from our next-in-flow until we can't if (!done && (nsnull != mNextInFlow)) { while (!done) { PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK(); PRBool isComplete; frame = PullOneFrame(aPresContext, irs, &isComplete); #ifdef NOISY_PUSHING printf("%p pulled up %p\n", this, frame); #endif if (nsnull == frame) { if (!isComplete) { aStatus = NS_FRAME_NOT_COMPLETE; } break; } rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus); if (NS_FAILED(rv)) { done = PR_TRUE; break; } if (NS_FRAME_COMPLETE != aStatus) { if (!reflowingFirstLetter || NS_INLINE_IS_BREAK(aStatus)) { done = PR_TRUE; break; } } irs.mPrevFrame = frame; } } #ifdef DEBUG if (NS_FRAME_COMPLETE == aStatus) { // We can't be complete AND have overflow frames! nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_FALSE); NS_ASSERTION(!overflowFrames, "whoops"); } #endif // If after reflowing our children they take up no area then make // sure that we don't either. // // Note: CSS demands that empty inline elements still affect the // line-height calculations. However, continuations of an inline // that are empty we force to empty so that things like collapsed // whitespace in an inline element don't affect the line-height. nsSize size; lineLayout->EndSpan(this, size, aMetrics.maxElementSize); if ((0 == size.height) && (0 == size.width) && ((nsnull != mPrevInFlow) || (nsnull != mNextInFlow))) { // This is a continuation of a previous inline. Therefore make // sure we don't affect the line-height. aMetrics.width = 0; aMetrics.height = 0; aMetrics.ascent = 0; aMetrics.descent = 0; if (nsnull != aMetrics.maxElementSize) { aMetrics.maxElementSize->width = 0; aMetrics.maxElementSize->height = 0; } } else { // Compute final width aMetrics.width = size.width; if (nsnull == mPrevInFlow) { aMetrics.width += aReflowState.mComputedBorderPadding.left; } if (NS_FRAME_IS_COMPLETE(aStatus)) { aMetrics.width += aReflowState.mComputedBorderPadding.right; } const nsStyleFont* font; GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&)font); aReflowState.rendContext->SetFont(font->mFont); nsCOMPtr fm; aReflowState.rendContext->GetFontMetrics(*getter_AddRefs(fm)); // Compute final height of the frame. // // Do things the standard css2 way -- though it's hard to find it // in the css2 spec! It's actually found in the css1 spec section // 4.4 (you will have to read between the lines to really see // it). // // The height of our box is the sum of our font size plus the top // and bottom border and padding. The height of children do not // affect our height. fm->GetMaxAscent(aMetrics.ascent); fm->GetMaxDescent(aMetrics.descent); fm->GetHeight(aMetrics.height); aMetrics.ascent += aReflowState.mComputedBorderPadding.top; aMetrics.descent += aReflowState.mComputedBorderPadding.bottom; aMetrics.height += aReflowState.mComputedBorderPadding.top + aReflowState.mComputedBorderPadding.bottom; // Note: we normally use the actual font height for computing the // line-height raw value from the style context. On systems where // they disagree the actual font height is more appropriate. This // little hack lets us override that behavior to allow for more // precise layout in the face of imprecise fonts. if (nsHTMLReflowState::UseComputedHeight()) { aMetrics.height = font->mFont.size + aReflowState.mComputedBorderPadding.top + aReflowState.mComputedBorderPadding.bottom; } } // For now our overflow area is zero. The real value will be // computed during vertical alignment of the line we are on. aMetrics.mOverflowArea.x = 0; aMetrics.mOverflowArea.y = 0; aMetrics.mOverflowArea.width = aMetrics.width; aMetrics.mOverflowArea.height = aMetrics.height; #ifdef NOISY_FINAL_SIZE ListTag(stdout); printf(": metrics=%d,%d ascent=%d descent=%d\n", aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent); if (nsnull != aMetrics.maxElementSize) { printf(" maxElementSize %d,%d\n", aMetrics.maxElementSize->width, aMetrics.maxElementSize->height); } #endif return rv; } static void SetContainsPercentAwareChild(nsIFrame *aFrame) { nsFrameState myFrameState; aFrame->GetFrameState(&myFrameState); aFrame->SetFrameState(myFrameState | NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD); } static void MarkPercentAwareFrame(nsIPresContext *aPresContext, nsInlineFrame *aInline, nsIFrame *aFrame) { nsFrameState childFrameState; aFrame->GetFrameState(&childFrameState); if (childFrameState & NS_FRAME_REPLACED_ELEMENT) { // aFrame is a replaced element, check it's style if (nsLineLayout::IsPercentageAwareReplacedElement(aPresContext, aFrame)) { SetContainsPercentAwareChild(aInline); } } else { nsIFrame *child; aFrame->FirstChild(aPresContext, nsnull, &child); if (child) { // aFrame is an inline container frame, check my frame state if (childFrameState & NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD) { SetContainsPercentAwareChild(aInline); // if a child container is effected, so am I } } // else frame is a leaf that we don't care about } } nsresult nsInlineFrame::ReflowInlineFrame(nsIPresContext* aPresContext, const nsHTMLReflowState& aReflowState, InlineReflowState& irs, nsIFrame* aFrame, nsReflowStatus& aStatus) { nsLineLayout* lineLayout = aReflowState.mLineLayout; PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK(); PRBool pushedFrame; nsresult rv = lineLayout->ReflowFrame(aFrame, &irs.mNextRCFrame, aStatus, nsnull, pushedFrame); /* This next block is for bug 28811 Test the child frame for %-awareness, and mark this frame with a bit if it is %-aware. Don't bother if this frame is already marked */ if (!(mState & NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD)) { MarkPercentAwareFrame(aPresContext, this, aFrame); } if (NS_FAILED(rv)) { return rv; } if (NS_INLINE_IS_BREAK(aStatus)) { if (NS_INLINE_IS_BREAK_BEFORE(aStatus)) { if (aFrame != mFrames.FirstChild()) { // Change break-before status into break-after since we have // already placed at least one child frame. This preserves the // break-type so that it can be propogated upward. aStatus = NS_FRAME_NOT_COMPLETE | NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER | (aStatus & NS_INLINE_BREAK_TYPE_MASK); PushFrames(aPresContext, aFrame, irs.mPrevFrame); } else { // Preserve reflow status when breaking-before our first child // and propogate it upward without modification. // Note: if we're lazily setting the frame pointer for our child // frames, then we need to set it now. Don't return and leave the // remaining child frames in our child list with the wrong parent // frame pointer... if (irs.mSetParentPointer) { nsIFrame* f; aFrame->GetNextSibling(&f); while (f) { f->SetParent(this); f->GetNextSibling(&f); } } } } else { // Break-after if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) { nsIFrame* newFrame; rv = CreateNextInFlow(aPresContext, this, aFrame, newFrame); if (NS_FAILED(rv)) { return rv; } } nsIFrame* nextFrame; aFrame->GetNextSibling(&nextFrame); if (nsnull != nextFrame) { aStatus |= NS_FRAME_NOT_COMPLETE; PushFrames(aPresContext, nextFrame, aFrame); } else if (nsnull != mNextInFlow) { // We must return an incomplete status if there are more child // frames remaining in a next-in-flow that follows this frame. nsInlineFrame* nextInFlow = (nsInlineFrame*) mNextInFlow; while (nsnull != nextInFlow) { if (nextInFlow->mFrames.NotEmpty()) { aStatus |= NS_FRAME_NOT_COMPLETE; break; } nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow; } } } } else if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) { nsIFrame* newFrame; rv = CreateNextInFlow(aPresContext, this, aFrame, newFrame); if (NS_FAILED(rv)) { return rv; } if (!reflowingFirstLetter) { nsIFrame* nextFrame; aFrame->GetNextSibling(&nextFrame); if (nsnull != nextFrame) { PushFrames(aPresContext, nextFrame, aFrame); } } } return rv; } nsIFrame* nsInlineFrame::PullOneFrame(nsIPresContext* aPresContext, InlineReflowState& irs, PRBool* aIsComplete) { PRBool isComplete = PR_TRUE; nsIFrame* frame = nsnull; nsInlineFrame* nextInFlow = irs.mNextInFlow; while (nsnull != nextInFlow) { frame = mFrames.PullFrame(this, irs.mPrevFrame, nextInFlow->mFrames); if (nsnull != frame) { isComplete = PR_FALSE; nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, nextInFlow, this); break; } nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow; irs.mNextInFlow = nextInFlow; } *aIsComplete = isComplete; return frame; } void nsInlineFrame::PushFrames(nsIPresContext* aPresContext, nsIFrame* aFromChild, nsIFrame* aPrevSibling) { NS_PRECONDITION(nsnull != aFromChild, "null pointer"); NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child"); #ifdef DEBUG nsIFrame* prevNextSibling; aPrevSibling->GetNextSibling(&prevNextSibling); NS_PRECONDITION(prevNextSibling == aFromChild, "bad prev sibling"); #endif #ifdef NOISY_PUSHING printf("%p pushing aFromChild %p, disconnecting from prev sib %p\n", this, aFromChild, aPrevSibling); #endif // Disconnect aFromChild from its previous sibling aPrevSibling->SetNextSibling(nsnull); // Add the frames to our overflow list (let our next in flow drain // our overflow list when it is ready) SetOverflowFrames(aPresContext, aFromChild); } ////////////////////////////////////////////////////////////////////// PRIntn nsInlineFrame::GetSkipSides() const { PRIntn skip = 0; if (nsnull != mPrevInFlow) { nsInlineFrame* prev = (nsInlineFrame*) mPrevInFlow; if (prev->mRect.height || prev->mRect.width) { // Prev-in-flow is not empty therefore we don't render our left // border edge. skip |= 1 << NS_SIDE_LEFT; } else { // If the prev-in-flow is empty, then go ahead and let our right // edge border render. } } if (nsnull != mNextInFlow) { nsInlineFrame* next = (nsInlineFrame*) mNextInFlow; if (next->mRect.height || next->mRect.width) { // Next-in-flow is not empty therefore we don't render our right // border edge. skip |= 1 << NS_SIDE_RIGHT; } else { // If the next-in-flow is empty, then go ahead and let our right // edge border render. } } return skip; } ////////////////////////////////////////////////////////////////////// // nsLineFrame implementation static void ReParentChildListStyle(nsIPresContext* aPresContext, nsIStyleContext* aParentStyleContext, nsFrameList& aFrameList) { nsIFrame* kid = aFrameList.FirstChild(); while (nsnull != kid) { aPresContext->ReParentStyleContext(kid, aParentStyleContext); kid->GetNextSibling(&kid); } } nsresult NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame) { NS_PRECONDITION(nsnull != aNewFrame, "null ptr"); if (nsnull == aNewFrame) { return NS_ERROR_NULL_POINTER; } nsInlineFrame* it = new (aPresShell) nsFirstLineFrame; if (nsnull == it) { return NS_ERROR_OUT_OF_MEMORY; } *aNewFrame = it; return NS_OK; } nsFirstLineFrame::nsFirstLineFrame() { } #ifdef DEBUG NS_IMETHODIMP nsFirstLineFrame::GetFrameName(nsString& aResult) const { return MakeFrameName("Line", aResult); } #endif NS_IMETHODIMP nsFirstLineFrame::GetFrameType(nsIAtom** aType) const { NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer"); *aType = nsLayoutAtoms::lineFrame; NS_ADDREF(*aType); return NS_OK; } void nsFirstLineFrame::StealFramesFrom(nsIFrame* aFrame) { nsIFrame* prevFrame = mFrames.GetPrevSiblingFor(aFrame); if (prevFrame) { prevFrame->SetNextSibling(nsnull); } else { mFrames.SetFrames(nsnull); } } nsIFrame* nsFirstLineFrame::PullOneFrame(nsIPresContext* aPresContext, InlineReflowState& irs, PRBool* aIsComplete) { nsIFrame* frame = nsInlineFrame::PullOneFrame(aPresContext, irs, aIsComplete); if (frame && !mPrevInFlow) { // We are a first-line frame. Fixup the child frames // style-context that we just pulled. aPresContext->ReParentStyleContext(frame, mStyleContext); } return frame; } NS_IMETHODIMP nsFirstLineFrame::Reflow(nsIPresContext* aPresContext, nsHTMLReflowMetrics& aMetrics, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { if (nsnull == aReflowState.mLineLayout) { return NS_ERROR_INVALID_ARG; } // Check for an overflow list with our prev-in-flow nsFirstLineFrame* prevInFlow = (nsFirstLineFrame*)mPrevInFlow; if (nsnull != prevInFlow) { nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext, PR_TRUE); if (prevOverflowFrames) { nsFrameList frames(prevOverflowFrames); ReParentChildListStyle(aPresContext, mStyleContext, frames); mFrames.InsertFrames(this, nsnull, prevOverflowFrames); } } // It's also possible that we have an overflow list for ourselves nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE); if (overflowFrames) { NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames"); nsFrameList frames(overflowFrames); ReParentChildListStyle(aPresContext, mStyleContext, frames); mFrames.AppendFrames(nsnull, overflowFrames); } // Set our own reflow state (additional state above and beyond // aReflowState) InlineReflowState irs; irs.mPrevFrame = nsnull; irs.mNextInFlow = (nsInlineFrame*) mNextInFlow; irs.mNextRCFrame = nsnull; if (eReflowReason_Incremental == aReflowState.reason) { // Peel off the next frame in the path if this is an incremental // reflow aimed at one of the children. nsIFrame* target; aReflowState.reflowCommand->GetTarget(target); if (this != target) { aReflowState.reflowCommand->GetNext(irs.mNextRCFrame); } } nsresult rv; PRBool wasEmpty = mFrames.IsEmpty(); if (wasEmpty) { // Try to pull over one frame before starting so that we know // whether we have an anonymous block or not. PRBool complete; PullOneFrame(aPresContext, irs, &complete); } if (nsnull == mPrevInFlow) { // XXX This is pretty sick, but what we do here is to pull-up, in // advance, all of the next-in-flows children. We re-resolve their // style while we are at at it so that when we reflow they have // the right style. // // All of this is so that text-runs reflow properly. irs.mPrevFrame = mFrames.LastChild(); for (;;) { PRBool complete; nsIFrame* frame = PullOneFrame(aPresContext, irs, &complete); if (!frame) { break; } irs.mPrevFrame = frame; } irs.mPrevFrame = nsnull; } else { // XXX do this in the Init method instead // For continuations, we need to check and see if our style // context is right. If its the same as the first-in-flow, then // we need to fix it up (that way :first-line style doesn't leak // into this continuation since we aren't the first line). nsFirstLineFrame* first = (nsFirstLineFrame*) GetFirstInFlow(); if (mStyleContext == first->mStyleContext) { // Fixup our style context and our children. First get the // proper parent context. nsIFrame* parentFrame; first->GetParent(&parentFrame); nsIStyleContext* parentContext; parentFrame->GetStyleContext(&parentContext); if (parentContext) { // Create a new style context that is a child of the parent // style context thus removing the :first-line style. This way // we behave as if an anonymous (unstyled) span was the child // of the parent frame. nsIStyleContext* newSC; aPresContext->ResolvePseudoStyleContextFor(mContent, nsHTMLAtoms::mozLineFrame, parentContext, PR_FALSE, &newSC); if (newSC) { // Switch to the new style context. SetStyleContext(aPresContext, newSC); // Re-resolve all children ReParentChildListStyle(aPresContext, mStyleContext, mFrames); NS_RELEASE(newSC); } NS_RELEASE(parentContext); } } } rv = ReflowFrames(aPresContext, aReflowState, irs, aMetrics, aStatus); // Note: the line layout code will properly compute our // NS_FRAME_OUTSIDE_CHILDREN state for us. return rv; } ////////////////////////////////////////////////////////////////////// nsresult NS_NewPositionedInlineFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame) { NS_PRECONDITION(aNewFrame, "null OUT ptr"); if (nsnull == aNewFrame) { return NS_ERROR_NULL_POINTER; } nsPositionedInlineFrame* it = new (aPresShell) nsPositionedInlineFrame; if (nsnull == it) { return NS_ERROR_OUT_OF_MEMORY; } *aNewFrame = it; return NS_OK; } NS_IMETHODIMP nsPositionedInlineFrame::Destroy(nsIPresContext* aPresContext) { mAbsoluteContainer.DestroyFrames(this, aPresContext); return nsInlineFrame::Destroy(aPresContext); } NS_IMETHODIMP nsPositionedInlineFrame::SetInitialChildList(nsIPresContext* aPresContext, nsIAtom* aListName, nsIFrame* aChildList) { nsresult rv; if (nsLayoutAtoms::absoluteList == aListName) { rv = mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList); } else { rv = nsInlineFrame::SetInitialChildList(aPresContext, aListName, aChildList); } return rv; } NS_IMETHODIMP nsPositionedInlineFrame::AppendFrames(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aFrameList) { nsresult rv; if (nsLayoutAtoms::absoluteList == aListName) { rv = mAbsoluteContainer.AppendFrames(this, aPresContext, aPresShell, aListName, aFrameList); } else { rv = nsInlineFrame::AppendFrames(aPresContext, aPresShell, aListName, aFrameList); } return rv; } NS_IMETHODIMP nsPositionedInlineFrame::InsertFrames(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aPrevFrame, nsIFrame* aFrameList) { nsresult rv; if (nsLayoutAtoms::absoluteList == aListName) { rv = mAbsoluteContainer.InsertFrames(this, aPresContext, aPresShell, aListName, aPrevFrame, aFrameList); } else { rv = nsInlineFrame::InsertFrames(aPresContext, aPresShell, aListName, aPrevFrame, aFrameList); } return rv; } NS_IMETHODIMP nsPositionedInlineFrame::RemoveFrame(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aOldFrame) { nsresult rv; if (nsLayoutAtoms::absoluteList == aListName) { rv = mAbsoluteContainer.RemoveFrame(this, aPresContext, aPresShell, aListName, aOldFrame); } else { rv = nsInlineFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame); } return rv; } NS_IMETHODIMP nsPositionedInlineFrame::GetAdditionalChildListName(PRInt32 aIndex, nsIAtom** aListName) const { NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer"); *aListName = nsnull; if (0 == aIndex) { *aListName = nsLayoutAtoms::absoluteList; NS_ADDREF(*aListName); } return NS_OK; } NS_IMETHODIMP nsPositionedInlineFrame::FirstChild(nsIPresContext* aPresContext, nsIAtom* aListName, nsIFrame** aFirstChild) const { NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer"); if (aListName == nsLayoutAtoms::absoluteList) { return mAbsoluteContainer.FirstChild(this, aListName, aFirstChild); } return nsInlineFrame::FirstChild(aPresContext, aListName, aFirstChild); } NS_IMETHODIMP nsPositionedInlineFrame::GetFrameType(nsIAtom** aType) const { NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer"); *aType = nsLayoutAtoms::positionedInlineFrame; NS_ADDREF(*aType); return NS_OK; } NS_IMETHODIMP nsPositionedInlineFrame::Reflow(nsIPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { nsresult rv = NS_OK; // See if it's an incremental reflow command if (eReflowReason_Incremental == aReflowState.reason) { // Give the absolute positioning code a chance to handle it PRBool handled; nsRect childBounds; nscoord containingBlockWidth = -1; nscoord containingBlockHeight = -1; mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState, containingBlockWidth, containingBlockHeight, handled, childBounds); // If the incremental reflow command was handled by the absolute positioning // code, then we're all done if (handled) { // Just return our current size as our desired size // XXX I don't know how to compute that without a reflow, so for the // time being pretend a resize reflow occured nsHTMLReflowState reflowState(aReflowState); reflowState.reason = eReflowReason_Resize; reflowState.reflowCommand = nsnull; rv = nsInlineFrame::Reflow(aPresContext, aDesiredSize, reflowState, aStatus); // XXX Although this seems like the correct thing to do the line layout // code seems to reset the NS_FRAME_OUTSIDE_CHILDREN and so it is ignored #if 0 // Factor the absolutely positioned child bounds into the overflow area aDesiredSize.mOverflowArea.UnionRect(aDesiredSize.mOverflowArea, childBounds); // Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly if ((aDesiredSize.mOverflowArea.x < 0) || (aDesiredSize.mOverflowArea.y < 0) || (aDesiredSize.mOverflowArea.XMost() > aDesiredSize.width) || (aDesiredSize.mOverflowArea.YMost() > aDesiredSize.height)) { mState |= NS_FRAME_OUTSIDE_CHILDREN; } else { mState &= ~NS_FRAME_OUTSIDE_CHILDREN; } #endif return rv; } } // Let the inline frame do its reflow first rv = nsInlineFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus); // Let the absolutely positioned container reflow any absolutely positioned // child frames that need to be reflowed if (NS_SUCCEEDED(rv)) { nscoord containingBlockWidth = -1; nscoord containingBlockHeight = -1; nsRect childBounds; rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState, containingBlockWidth, containingBlockHeight, childBounds); // XXX Although this seems like the correct thing to do the line layout // code seems to reset the NS_FRAME_OUTSIDE_CHILDREN and so it is ignored #if 0 // Factor the absolutely positioned child bounds into the overflow area aDesiredSize.mOverflowArea.UnionRect(aDesiredSize.mOverflowArea, childBounds); // Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly if ((aDesiredSize.mOverflowArea.x < 0) || (aDesiredSize.mOverflowArea.y < 0) || (aDesiredSize.mOverflowArea.XMost() > aDesiredSize.width) || (aDesiredSize.mOverflowArea.YMost() > aDesiredSize.height)) { mState |= NS_FRAME_OUTSIDE_CHILDREN; } else { mState &= ~NS_FRAME_OUTSIDE_CHILDREN; } #endif } return rv; } #ifdef DEBUG NS_IMETHODIMP nsPositionedInlineFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const { if (!aResult) { return NS_ERROR_NULL_POINTER; } *aResult = sizeof(*this); return NS_OK; } #endif