/* -*- 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 1.0 (the "NPL"); you may not use this file except in * compliance with the NPL. You may obtain a copy of the NPL at * http://www.mozilla.org/NPL/ * * Software distributed under the NPL is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL * for the specific language governing rights and limitations under the * NPL. * * The Initial Developer of this code under the NPL is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All Rights * Reserved. */ #include "nsTableRowFrame.h" #include "nsIRenderingContext.h" #include "nsIPresContext.h" #include "nsIStyleContext.h" #include "nsStyleConsts.h" #include "nsIContent.h" #include "nsIContentDelegate.h" #include "nsTableFrame.h" #include "nsTableCellFrame.h" #include "nsTableCell.h" #include "nsCellLayoutData.h" #include "nsIView.h" #ifdef NS_DEBUG static PRBool gsDebug1 = PR_FALSE; static PRBool gsDebug2 = PR_FALSE; //#define NOISY //#define NOISY_FLOW #else static const PRBool gsDebug1 = PR_FALSE; static const PRBool gsDebug2 = PR_FALSE; #endif /* ----------- RowReflowState ---------- */ struct RowReflowState { // The body's available size (computed from the body's parent) nsSize availSize; // Margin tracking information nscoord prevMaxPosBottomMargin; nscoord prevMaxNegBottomMargin; // Flags for whether the max size is unconstrained PRBool unconstrainedWidth; PRBool unconstrainedHeight; // Running x-offset nscoord x; // Height of tallest cell (excluding cells with rowspan>1) nscoord maxCellHeight; nscoord maxCellVertSpace; // the maximum MAX(cellheight+top+bottom) nscoord maxCellHorzSpace; // the maximum MAX(cellheight+top+bottom) nsTableFrame *tableFrame; RowReflowState( nsIPresContext* aPresContext, const nsSize& aMaxSize) { availSize.width = aMaxSize.width; availSize.height = aMaxSize.height; prevMaxPosBottomMargin = 0; prevMaxNegBottomMargin = 0; x=0; unconstrainedWidth = PRBool(aMaxSize.width == NS_UNCONSTRAINEDSIZE); unconstrainedHeight = PRBool(aMaxSize.height == NS_UNCONSTRAINEDSIZE); maxCellHeight=0; maxCellVertSpace=0; maxCellHorzSpace=0; tableFrame = nsnull; } ~RowReflowState() { } }; /* ----------- nsTableRowpFrame ---------- */ nsTableRowFrame::nsTableRowFrame(nsIContent* aContent, nsIFrame* aParentFrame) : nsContainerFrame(aContent, aParentFrame), mTallestCell(0), mCellMaxTopMargin(0), mCellMaxBottomMargin(0) { } nsTableRowFrame::~nsTableRowFrame() { } void nsTableRowFrame::ResetMaxChildHeight() { mTallestCell=0; mCellMaxTopMargin=0; mCellMaxBottomMargin=0; } void nsTableRowFrame::SetMaxChildHeight(nscoord aChildHeight, nscoord aTopMargin, nscoord aBottomMargin) { if (mTallestCellGetView(pView); if (nsnull == pView) { nsRect kidRect; kid->GetRect(kidRect); nsRect damageArea(aDirtyRect); // Translate damage area into kid's coordinate system nsRect kidDamageArea(damageArea.x - kidRect.x, damageArea.y - kidRect.y, damageArea.width, damageArea.height); aRenderingContext.PushState(); aRenderingContext.Translate(kidRect.x, kidRect.y); kid->Paint(aPresContext, aRenderingContext, kidDamageArea); if (nsIFrame::GetShowFrameBorders()) { aRenderingContext.SetColor(NS_RGB(255,0,0)); aRenderingContext.DrawRect(0, 0, kidRect.width, kidRect.height); } aRenderingContext.PopState(); } else { NS_RELEASE(pView); } kid->GetNextSibling(kid); } } /** returns the height of the tallest child in this row (ignoring any cell with rowspans) */ nscoord nsTableRowFrame::GetTallestChild() const { return mTallestCell; } nscoord nsTableRowFrame::GetChildMaxTopMargin() const { return mCellMaxTopMargin; } nscoord nsTableRowFrame::GetChildMaxBottomMargin() const { return mCellMaxBottomMargin; } // Collapse child's top margin with previous bottom margin nscoord nsTableRowFrame::GetTopMarginFor( nsIPresContext* aCX, RowReflowState& aState, const nsMargin& aKidMargin) { nscoord margin; nscoord maxNegTopMargin = 0; nscoord maxPosTopMargin = 0; if ((margin = aKidMargin.top) < 0) { maxNegTopMargin = -margin; } else { maxPosTopMargin = margin; } nscoord maxPos = PR_MAX(aState.prevMaxPosBottomMargin, maxPosTopMargin); nscoord maxNeg = PR_MAX(aState.prevMaxNegBottomMargin, maxNegTopMargin); margin = maxPos - maxNeg; return margin; } // Position and size aKidFrame and update our reflow state. The origin of // aKidRect is relative to the upper-left origin of our frame, and includes // any left/top margin. void nsTableRowFrame::PlaceChild(nsIPresContext* aPresContext, RowReflowState& aState, nsIFrame* aKidFrame, const nsRect& aKidRect, nsSize* aMaxElementSize, nsSize& aKidMaxElementSize) { if (PR_TRUE==gsDebug1) printf ("row: placing cell at %d, %d, %d, %d\n", aKidRect.x, aKidRect.y, aKidRect.width, aKidRect.height); // Place and size the child aKidFrame->SetRect(aKidRect); // Update the maximum element size PRInt32 rowSpan = ((nsTableCellFrame*)aKidFrame)->GetRowSpan(); if (nsnull != aMaxElementSize) { aMaxElementSize->width += aKidMaxElementSize.width; if ((1==rowSpan) && (aKidMaxElementSize.height>aMaxElementSize->height)) { aMaxElementSize->height = aKidMaxElementSize.height; } } if ((1==rowSpan) && (aState.maxCellHeightGetCellMarginData(aKidFrame, margin) == NS_OK) { nscoord height = aKidRect.height + margin.top + margin.bottom; if (height > aState.maxCellVertSpace) aState.maxCellVertSpace = height; } } } /** * Reflow the frames we've already created * * @param aPresContext presentation context to use * @param aState current inline state * @return true if we successfully reflowed all the mapped children and false * otherwise, e.g. we pushed children to the next in flow */ PRBool nsTableRowFrame::ReflowMappedChildren(nsIPresContext* aPresContext, RowReflowState& aState, nsSize* aMaxElementSize) { #ifdef NS_DEBUG VerifyLastIsComplete(); #endif #ifdef NOISY ListTag(stdout); printf(": reflow mapped (childCount=%d) [%d,%d,%c]\n", mChildCount, mFirstContentOffset, mLastContentOffset, (mLastContentIsComplete ? 'T' : 'F')); #ifdef NOISY_FLOW { nsTableRowFrame* flow = (nsTableRowFrame*) mNextInFlow; while (flow != 0) { printf(" %p: [%d,%d,%c]\n", flow, flow->mFirstContentOffset, flow->mLastContentOffset, (flow->mLastContentIsComplete ? 'T' : 'F')); flow = (nsTableRowFrame*) flow->mNextInFlow; } } #endif #endif NS_PRECONDITION(nsnull != mFirstChild, "no children"); PRInt32 childCount = 0; nsIFrame* prevKidFrame = nsnull; // Remember our original mLastContentIsComplete so that if we end up // having to push children, we have the correct value to hand to // PushChildren. PRBool lastContentIsComplete = mLastContentIsComplete; nsSize kidMaxElementSize; nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull; PRBool result = PR_TRUE; nscoord maxCellTopMargin = 0; nscoord maxCellBottomMargin = 0; for (nsIFrame* kidFrame = mFirstChild; nsnull != kidFrame; ) { nsIContent* content = nsnull; kidFrame->GetContent(content); // cell: REFCNT++ nsTableCell* cell = (nsTableCell*)content; nsSize kidAvailSize(aState.availSize); if (0>=kidAvailSize.height) kidAvailSize.height = 1; // XXX: HaCk - we don't handle negative heights yet nsReflowMetrics desiredSize(pKidMaxElementSize); nsReflowStatus status; nsMargin kidMargin(0,0,0,0); aState.tableFrame->GetCellMarginData(kidFrame,kidMargin); if (kidMargin.top > maxCellTopMargin) maxCellTopMargin = kidMargin.top; if (kidMargin.bottom > maxCellBottomMargin) maxCellBottomMargin = kidMargin.bottom; // Figure out the amount of available size for the child (subtract // off the top margin we are going to apply to it) if (PR_FALSE == aState.unconstrainedHeight) { kidAvailSize.height -= kidMargin.top + kidMargin.bottom; } // Subtract off for left and right margin if (PR_FALSE == aState.unconstrainedWidth) { kidAvailSize.width -= kidMargin.left + kidMargin.right; } if (NS_UNCONSTRAINEDSIZE == aState.availSize.width) { // Reflow the child into the available space nsReflowState kidReflowState(eReflowReason_Resize, kidAvailSize); kidFrame->WillReflow(*aPresContext); status = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState); nsCellLayoutData kidLayoutData((nsTableCellFrame *)kidFrame, &desiredSize, pKidMaxElementSize); aState.tableFrame->SetCellLayoutData(&kidLayoutData, cell); } else { // we're in a constrained situation, so get the avail width from the known column widths nsCellLayoutData *cellData = aState.tableFrame->GetCellLayoutData(cell); PRInt32 cellStartingCol = cell->GetColIndex(); PRInt32 cellColSpan = cell->GetColSpan(); nscoord availWidth = 0; for (PRInt32 numColSpan=0; numColSpanGetColumnWidth(cellStartingCol+numColSpan); kidAvailSize.width = availWidth; nsReflowState kidReflowState(eReflowReason_Resize, kidAvailSize); kidFrame->WillReflow(*aPresContext); status = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState); } if (nsnull!=pKidMaxElementSize) { if (gsDebug1) { if (nsnull!=pKidMaxElementSize) printf("reflow of cell returned result = %s with desired=%d,%d, min = %d,%d\n", NS_FRAME_IS_COMPLETE(status)?"complete":"NOT complete", desiredSize.width, desiredSize.height, pKidMaxElementSize->width, pKidMaxElementSize->height); else printf("reflow of cell returned result = %s with desired=%d,%d, min = nsnull\n", NS_FRAME_IS_COMPLETE(status)?"complete":"NOT complete", desiredSize.width, desiredSize.height); } } NS_RELEASE(content); // cell: REFCNT-- cell = nsnull; // Did the child fit? if ((kidFrame != mFirstChild) && ((kidAvailSize.height <= 0) || (desiredSize.height > kidAvailSize.height))) { // The child's height is too big to fit at all in our remaining space, // and it's not our first child. // Since we are giving the next-in-flow our last child, we // give it our original mLastContentIsComplete, too (in case we // are pushing into an empty next-in-flow) PushChildren(kidFrame, prevKidFrame, lastContentIsComplete); SetLastContentOffset(prevKidFrame); // Our mLastContentIsComplete was already set by the last kid we // reflowed reflow's status result = PR_FALSE; break; } // Adjust the running x-offset, taking into account intruders (cells from prior rows with rowspans > 1) aState.x = kidMargin.left; PRInt32 cellColIndex = ((nsTableCellFrame *)kidFrame)->GetColIndex(); for (PRInt32 colIndex=0; colIndexGetColumnWidth(colIndex); // Place the child after taking into account it's margin nsRect kidRect (aState.x, kidMargin.top, desiredSize.width, desiredSize.height); PlaceChild(aPresContext, aState, kidFrame, kidRect, aMaxElementSize, kidMaxElementSize); if (kidMargin.bottom < 0) { aState.prevMaxNegBottomMargin = -kidMargin.bottom; } else { aState.prevMaxPosBottomMargin = kidMargin.bottom; } childCount++; // Remember where we just were in case we end up pushing children prevKidFrame = kidFrame; // Update mLastContentIsComplete now that this kid fits mLastContentIsComplete = NS_FRAME_IS_COMPLETE(status); /* Rows should not create continuing frames for cells * unless they absolutely have to! * check to see if this is absolutely necessary (with new params from troy) * otherwise PushChildren and bail. */ // Special handling for incomplete children if (NS_FRAME_IS_NOT_COMPLETE(status)) { // XXX It's good to assume that we might still have room // even if the child didn't complete (floaters will want this) nsIFrame* kidNextInFlow; kidFrame->GetNextInFlow(kidNextInFlow); PRBool lastContentIsComplete = mLastContentIsComplete; if (nsnull == kidNextInFlow) { // No the child isn't complete, and it doesn't have a next in flow so // create a continuing frame. This hooks the child into the flow. nsIFrame* continuingFrame; nsIStyleContext* kidSC; kidFrame->GetStyleContext(aPresContext, kidSC); kidFrame->CreateContinuingFrame(aPresContext, this, kidSC, continuingFrame); NS_RELEASE(kidSC); // Insert the frame. We'll reflow it next pass through the loop nsIFrame* nextSib; kidFrame->GetNextSibling(nextSib); continuingFrame->SetNextSibling(nextSib); kidFrame->SetNextSibling(continuingFrame); if (nsnull == nextSib) { // Assume that the continuation frame we just created is // complete, for now. It will get reflowed by our // next-in-flow (we are going to push it now) lastContentIsComplete = PR_TRUE; } } // We've used up all of our available space so push the remaining // children to the next-in-flow nsIFrame* nextSibling; kidFrame->GetNextSibling(nextSibling); if (nsnull != nextSibling) { PushChildren(nextSibling, kidFrame, lastContentIsComplete); SetLastContentOffset(prevKidFrame); } result = PR_FALSE; break; } // Add back in the left and right margins, because one row does not // impact another row's width if (PR_FALSE == aState.unconstrainedWidth) { kidAvailSize.width += kidMargin.left + kidMargin.right; } // Get the next child kidFrame->GetNextSibling(kidFrame); } SetMaxChildHeight(aState.maxCellHeight,maxCellTopMargin, maxCellBottomMargin); // remember height of tallest child who doesn't have a row span // Update the child count mChildCount = childCount; #ifdef NS_DEBUG NS_POSTCONDITION(LengthOf(mFirstChild) == mChildCount, "bad child count"); nsIFrame* lastChild; PRInt32 lastIndexInParent; LastChild(lastChild); lastChild->GetContentIndex(lastIndexInParent); NS_POSTCONDITION(lastIndexInParent == mLastContentOffset, "bad last content offset"); #endif #ifdef NS_DEBUG VerifyLastIsComplete(); #endif #ifdef NOISY ListTag(stdout); printf(": reflow mapped %sok (childCount=%d) [%d,%d,%c]\n", (result ? "" : "NOT "), mChildCount, mFirstContentOffset, mLastContentOffset, (mLastContentIsComplete ? 'T' : 'F')); #ifdef NOISY_FLOW { nsTableRowFrame* flow = (nsTableRowFrame*) mNextInFlow; while (flow != 0) { printf(" %p: [%d,%d,%c]\n", flow, flow->mFirstContentOffset, flow->mLastContentOffset, (flow->mLastContentIsComplete ? 'T' : 'F')); flow = (nsTableRowFrame*) flow->mNextInFlow; } } #endif #endif return result; } /** * Try and pull-up frames from our next-in-flow * * @param aPresContext presentation context to use * @param aState current inline state * @return true if we successfully pulled-up all the children and false * otherwise, e.g. child didn't fit */ PRBool nsTableRowFrame::PullUpChildren(nsIPresContext* aPresContext, RowReflowState& aState, nsSize* aMaxElementSize) { #ifdef NS_DEBUG VerifyLastIsComplete(); #endif #ifdef NOISY ListTag(stdout); printf(": pullup (childCount=%d) [%d,%d,%c]\n", mChildCount, mFirstContentOffset, mLastContentOffset, (mLastContentIsComplete ? 'T' : 'F')); #ifdef NOISY_FLOW { nsTableRowFrame* flow = (nsTableRowFrame*) mNextInFlow; while (flow != 0) { printf(" %p: [%d,%d,%c]\n", flow, flow->mFirstContentOffset, flow->mLastContentOffset, (flow->mLastContentIsComplete ? 'T' : 'F')); flow = (nsTableRowFrame*) flow->mNextInFlow; } } #endif #endif nsTableRowFrame* nextInFlow = (nsTableRowFrame*)mNextInFlow; nsSize kidMaxElementSize; nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull; nsSize kidAvailSize(aState.availSize); #ifdef NS_DEBUG PRInt32 kidIndex = NextChildOffset(); #endif nsIFrame* prevKidFrame; LastChild(prevKidFrame); // This will hold the prevKidFrame's mLastContentIsComplete // status. If we have to push the frame that follows prevKidFrame // then this will become our mLastContentIsComplete state. Since // prevKidFrame is initially our last frame, it's completion status // is our mLastContentIsComplete value. PRBool prevLastContentIsComplete = mLastContentIsComplete; PRBool result = PR_TRUE; while (nsnull != nextInFlow) { nsReflowMetrics desiredSize(pKidMaxElementSize); nsReflowStatus status; // Get the next child nsIFrame* kidFrame = nextInFlow->mFirstChild; // Any more child frames? if (nsnull == kidFrame) { // No. Any frames on its overflow list? if (nsnull != nextInFlow->mOverflowList) { // Move the overflow list to become the child list // NS_ABORT(); nextInFlow->AppendChildren(nextInFlow->mOverflowList); nextInFlow->mOverflowList = nsnull; kidFrame = nextInFlow->mFirstChild; } else { // We've pulled up all the children, so move to the next-in-flow. nextInFlow->GetNextInFlow((nsIFrame*&)nextInFlow); continue; } } // See if the child fits in the available space. If it fits or // it's splittable then reflow it. The reason we can't just move // it is that we still need ascent/descent information nsSize kidFrameSize; nsSplittableType kidIsSplittable; kidFrame->GetSize(kidFrameSize); kidFrame->IsSplittable(kidIsSplittable); if ((kidFrameSize.height > aState.availSize.height) && NS_FRAME_IS_NOT_SPLITTABLE(kidIsSplittable)) { result = PR_FALSE; mLastContentIsComplete = prevLastContentIsComplete; break; } nsIContent *content = nsnull; kidFrame->GetContent(content); // cell: REFNCT++ nsTableCell* cell = (nsTableCell*)content; // we're in a constrained situation, so get the avail width from the known column widths nsCellLayoutData *cellData = aState.tableFrame->GetCellLayoutData(cell); PRInt32 cellStartingCol = cell->GetColIndex(); PRInt32 cellColSpan = cell->GetColSpan(); nscoord availWidth = 0; for (PRInt32 numColSpan=0; numColSpanGetColumnWidth(cellStartingCol+numColSpan); NS_ASSERTION(0WillReflow(*aPresContext); status = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState); if (nsnull!=pKidMaxElementSize) { if (gsDebug1) { if (nsnull!=pKidMaxElementSize) printf("reflow of cell returned result = %s with desired=%d,%d, min = %d,%d\n", NS_FRAME_IS_COMPLETE(status)?"complete":"NOT complete", desiredSize.width, desiredSize.height, pKidMaxElementSize->width, pKidMaxElementSize->height); else printf("reflow of cell returned result = %s with desired=%d,%d, min = nsnull\n", NS_FRAME_IS_COMPLETE(status)?"complete":"NOT complete", desiredSize.width, desiredSize.height); } } NS_RELEASE(content); // cell: REFCNT-- cell = nsnull; // Did the child fit? if ((desiredSize.height > aState.availSize.height) && (nsnull != mFirstChild)) { // The child is too tall to fit in the available space, and it's // not our first child result = PR_FALSE; mLastContentIsComplete = prevLastContentIsComplete; break; } // Adjust the running x-offset, taking into account intruders (cells from prior rows with rowspans > 1) aState.x = 0; PRInt32 cellColIndex = ((nsTableCellFrame *)kidFrame)->GetColIndex(); for (PRInt32 colIndex=0; colIndexGetColumnWidth(colIndex); // Place the child //nscoord topMargin = GetTopMarginFor(aPresContext, aState, kidMol); nsRect kidRect (aState.x, 0, desiredSize.width, desiredSize.height); PlaceChild(aPresContext, aState, kidFrame, kidRect, aMaxElementSize, *pKidMaxElementSize); // Remove the frame from its current parent kidFrame->GetNextSibling(nextInFlow->mFirstChild); nextInFlow->mChildCount--; // Update the next-in-flows first content offset if (nsnull != nextInFlow->mFirstChild) { nextInFlow->SetFirstContentOffset(nextInFlow->mFirstChild); } // Link the frame into our list of children kidFrame->SetGeometricParent(this); nsIFrame* kidContentParent; kidFrame->GetContentParent(kidContentParent); if (nextInFlow == kidContentParent) { kidFrame->SetContentParent(this); } if (nsnull == prevKidFrame) { mFirstChild = kidFrame; SetFirstContentOffset(kidFrame); } else { prevKidFrame->SetNextSibling(kidFrame); } kidFrame->SetNextSibling(nsnull); mChildCount++; // Remember where we just were in case we end up pushing children prevKidFrame = kidFrame; prevLastContentIsComplete = mLastContentIsComplete; // Is the child we just pulled up complete? mLastContentIsComplete = NS_FRAME_IS_COMPLETE(status); if (NS_FRAME_IS_NOT_COMPLETE(status)) { // No the child isn't complete nsIFrame* kidNextInFlow; kidFrame->GetNextInFlow(kidNextInFlow); if (nsnull == kidNextInFlow) { // The child doesn't have a next-in-flow so create a // continuing frame. The creation appends it to the flow and // prepares it for reflow. nsIFrame* continuingFrame; nsIStyleContext* kidSC; kidFrame->GetStyleContext(aPresContext, kidSC); kidFrame->CreateContinuingFrame(aPresContext, this, kidSC, continuingFrame); NS_RELEASE(kidSC); NS_ASSERTION(nsnull != continuingFrame, "frame creation failed"); // Add the continuing frame to our sibling list and then push // it to the next-in-flow. This ensures the next-in-flow's // content offsets and child count are set properly. Note that // we can safely assume that the continuation is complete so // we pass PR_TRUE into PushChidren in case our next-in-flow // was just drained and now needs to know it's // mLastContentIsComplete state. kidFrame->SetNextSibling(continuingFrame); PushChildren(continuingFrame, kidFrame, PR_TRUE); // After we push the continuation frame we don't need to fuss // with mLastContentIsComplete beause the continuation frame // is no longer on *our* list. } // If the child isn't complete then it means that we've used up // all of our available space. result = PR_FALSE; break; } } // Update our last content offset if (nsnull != prevKidFrame) { NS_ASSERTION(IsLastChild(prevKidFrame), "bad last child"); SetLastContentOffset(prevKidFrame); } // We need to make sure the first content offset is correct for any empty // next-in-flow frames (frames where we pulled up all the child frames) nextInFlow = (nsTableRowFrame*)mNextInFlow; if ((nsnull != nextInFlow) && (nsnull == nextInFlow->mFirstChild)) { // We have at least one empty frame. Did we succesfully pull up all the // child frames? if (PR_FALSE == result) { // No, so we need to adjust the first content offset of all the empty // frames AdjustOffsetOfEmptyNextInFlows(); #ifdef NS_DEBUG } else { // Yes, we successfully pulled up all the child frames which means all // the next-in-flows must be empty. Do a sanity check while (nsnull != nextInFlow) { NS_ASSERTION(nsnull == nextInFlow->mFirstChild, "non-empty next-in-flow"); nextInFlow->GetNextInFlow((nsIFrame*&)nextInFlow); } #endif } } #ifdef NS_DEBUG VerifyLastIsComplete(); #endif #ifdef NOISY ListTag(stdout); printf(": pullup %sok (childCount=%d) [%d,%d,%c]\n", (result ? "" : "NOT "), mChildCount, mFirstContentOffset, mLastContentOffset, (mLastContentIsComplete ? 'T' : 'F')); #ifdef NOISY_FLOW { nsTableRowFrame* flow = (nsTableRowFrame*) mNextInFlow; while (flow != 0) { printf(" %p: [%d,%d,%c]\n", flow, flow->mFirstContentOffset, flow->mLastContentOffset, (flow->mLastContentIsComplete ? 'T' : 'F')); flow = (nsTableRowFrame*) flow->mNextInFlow; } } #endif #endif return result; } /** * Create new frames for content we haven't yet mapped * * @param aPresContext presentation context to use * @param aState current inline state * @return NS_FRAME_COMPLETE if all content has been mapped and NS_FRAME_NOT_COMPLETE * if we should be continued */ nsReflowStatus nsTableRowFrame::ReflowUnmappedChildren( nsIPresContext* aPresContext, RowReflowState& aState, nsSize* aMaxElementSize) { #ifdef NS_DEBUG VerifyLastIsComplete(); #endif nsIFrame* kidPrevInFlow = nsnull; nsReflowStatus result = NS_FRAME_NOT_COMPLETE; // If we have no children and we have a prev-in-flow then we need to pick // up where it left off. If we have children, e.g. we're being resized, then // our content offset should already be set correctly... if ((nsnull == mFirstChild) && (nsnull != mPrevInFlow)) { nsTableRowFrame* prev = (nsTableRowFrame*)mPrevInFlow; NS_ASSERTION(prev->mLastContentOffset >= prev->mFirstContentOffset, "bad prevInFlow"); mFirstContentOffset = prev->NextChildOffset(); if (!prev->mLastContentIsComplete) { // Our prev-in-flow's last child is not complete prev->LastChild(kidPrevInFlow); } } mLastContentIsComplete = PR_TRUE; // Place our children, one at a time, until we are out of children nsSize kidMaxElementSize; nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull; nsSize kidAvailSize(aState.availSize); PRInt32 kidIndex = NextChildOffset(); nsIFrame* prevKidFrame; nscoord maxTopMargin = 0; nscoord maxBottomMargin = 0; LastChild(prevKidFrame); // XXX remember this... for (;;) { // Get the next content object nsIContent* cell = mContent->ChildAt(kidIndex); if (nsnull == cell) { result = NS_FRAME_COMPLETE; break; } // Make sure we still have room left if (aState.availSize.height <= 0) { // Note: return status was set to NS_FRAME_NOT_COMPLETE above... NS_RELEASE(cell); // cell: REFCNT--(a) break; } nsIFrame* kidFrame; // Create a child frame nsIStyleContext* kidStyleContext = aPresContext->ResolveStyleContextFor(cell, this); if (nsnull == kidPrevInFlow) { nsIContentDelegate* kidDel = nsnull; kidDel = cell->GetDelegate(aPresContext); nsresult rv = kidDel->CreateFrame(aPresContext, cell, this, kidStyleContext, kidFrame); NS_RELEASE(kidDel); } else { kidPrevInFlow->CreateContinuingFrame(aPresContext, this, kidStyleContext, kidFrame); } NS_RELEASE(kidStyleContext); nsMargin margin(0,0,0,0); nscoord topMargin = 0; nscoord bottomMargin = 0; if (aState.tableFrame->GetCellMarginData(kidFrame, margin) == NS_OK) { topMargin = margin.top; bottomMargin = margin.bottom; } maxTopMargin = PR_MAX(margin.top,maxTopMargin); maxBottomMargin = PR_MAX(margin.bottom,maxBottomMargin); // Try to reflow the child into the available space. It might not // fit or might need continuing. nsReflowMetrics desiredSize(pKidMaxElementSize); nsReflowStatus status; if (NS_UNCONSTRAINEDSIZE == aState.availSize.width) { nsReflowState kidReflowState(eReflowReason_Initial, kidAvailSize); // Reflow the child into the available space kidFrame->WillReflow(*aPresContext); status = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState); nsCellLayoutData kidLayoutData((nsTableCellFrame *)kidFrame, &desiredSize, pKidMaxElementSize); aState.tableFrame->SetCellLayoutData(&kidLayoutData, (nsTableCell *)cell); } else { // we're in a constrained situation, so get the avail width from the known column widths nsCellLayoutData *cellData = aState.tableFrame->GetCellLayoutData((nsTableCell *)cell); PRInt32 cellStartingCol = ((nsTableCell *)cell)->GetColIndex(); PRInt32 cellColSpan = ((nsTableCell *)cell)->GetColSpan(); nscoord availWidth = 0; for (PRInt32 numColSpan=0; numColSpanGetColumnWidth(cellStartingCol+numColSpan); NS_ASSERTION(0WillReflow(*aPresContext); status = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState); } if (nsnull!=pKidMaxElementSize) { if (gsDebug1) { if (nsnull!=pKidMaxElementSize) printf("reflow of cell returned result = %s with desired=%d,%d, min = %d,%d\n", NS_FRAME_IS_COMPLETE(status)?"complete":"NOT complete", desiredSize.width, desiredSize.height, pKidMaxElementSize->width, pKidMaxElementSize->height); else printf("reflow of cell returned result = %s with desired=%d,%d, min = nsnull\n", NS_FRAME_IS_COMPLETE(status)?"complete":"NOT complete", desiredSize.width, desiredSize.height); } } NS_RELEASE(cell); // cell: REFCNT-- // Did the child fit? if ((desiredSize.height > aState.availSize.height) && (nsnull != mFirstChild)) { // The child is too wide to fit in the available space, and it's // not our first child. Add the frame to our overflow list NS_ASSERTION(nsnull == mOverflowList, "bad overflow list"); mOverflowList = kidFrame; prevKidFrame->SetNextSibling(nsnull); break; } aState.x = margin.left; // if we're constrained, compute the x offset where the cell should be put if (NS_UNCONSTRAINEDSIZE!=aState.availSize.width) { // Adjust the running x-offset, taking into account intruders (cells from prior rows with rowspans > 1) PRInt32 cellColIndex = ((nsTableCellFrame *)kidFrame)->GetColIndex(); for (PRInt32 colIndex=0; colIndexGetColumnWidth(colIndex); } // Place the child nsRect kidRect (aState.x, topMargin, desiredSize.width, desiredSize.height); PlaceChild(aPresContext, aState, kidFrame, kidRect, aMaxElementSize, *pKidMaxElementSize); // Link child frame into the list of children if (nsnull != prevKidFrame) { prevKidFrame->SetNextSibling(kidFrame); } else { mFirstChild = kidFrame; // our first child SetFirstContentOffset(kidFrame); } prevKidFrame = kidFrame; mChildCount++; kidIndex++; // Did the child complete? if (NS_FRAME_IS_NOT_COMPLETE(status)) { // If the child isn't complete then it means that we've used up // all of our available space mLastContentIsComplete = PR_FALSE; break; } kidPrevInFlow = nsnull; } SetMaxChildHeight(aState.maxCellHeight, maxTopMargin, maxBottomMargin); // remember height of tallest child who doesn't have a row span // Update the content mapping NS_ASSERTION(IsLastChild(prevKidFrame), "bad last child"); SetLastContentOffset(prevKidFrame); #ifdef NS_DEBUG PRInt32 len = LengthOf(mFirstChild); NS_ASSERTION(len == mChildCount, "bad child count"); #endif #ifdef NS_DEBUG VerifyLastIsComplete(); #endif return result; } /** Layout the entire row. * This method stacks rows horizontally according to HTML 4.0 rules. * Rows are responsible for layout of their children (cells). */ NS_METHOD nsTableRowFrame::Reflow(nsIPresContext* aPresContext, nsReflowMetrics& aDesiredSize, const nsReflowState& aReflowState, nsReflowStatus& aStatus) { if (gsDebug1==PR_TRUE) printf("nsTableRowFrame::Reflow - aMaxSize = %d, %d\n", aReflowState.maxSize.width, aReflowState.maxSize.height); #ifdef NS_DEBUG PreReflowCheck(); #endif // Initialize out parameter if (nsnull != aDesiredSize.maxElementSize) { aDesiredSize.maxElementSize->width = 0; aDesiredSize.maxElementSize->height = 0; } // Initialize our internal data ResetMaxChildHeight(); PRBool reflowMappedOK = PR_TRUE; aStatus = NS_FRAME_COMPLETE; // Check for an overflow list MoveOverflowToChildList(); RowReflowState state(aPresContext, aReflowState.maxSize); mContentParent->GetContentParent((nsIFrame*&)(state.tableFrame)); // Reflow the existing frames if (nsnull != mFirstChild) { reflowMappedOK = ReflowMappedChildren(aPresContext, state, aDesiredSize.maxElementSize); if (PR_FALSE == reflowMappedOK) { aStatus = NS_FRAME_NOT_COMPLETE; } } // Did we successfully relow our mapped children? if (PR_TRUE == reflowMappedOK) { // Any space left? if (state.availSize.height <= 0) { // No space left. Don't try to pull-up children or reflow unmapped if (NextChildOffset() < mContent->ChildCount()) { aStatus = NS_FRAME_NOT_COMPLETE; } } else if (NextChildOffset() < mContent->ChildCount()) { // Try and pull-up some children from a next-in-flow if (PullUpChildren(aPresContext, state, aDesiredSize.maxElementSize)) { // If we still have unmapped children then create some new frames if (NextChildOffset() < mContent->ChildCount()) { aStatus = ReflowUnmappedChildren(aPresContext, state, aDesiredSize.maxElementSize); } } else { // We were unable to pull-up all the existing frames from the // next in flow aStatus = NS_FRAME_NOT_COMPLETE; } } } if (NS_FRAME_IS_COMPLETE(aStatus)) { // Don't forget to add in the bottom margin from our last child. // Only add it in if there's room for it. nscoord margin = state.prevMaxPosBottomMargin - state.prevMaxNegBottomMargin; } // Return our desired rect aDesiredSize.width = aReflowState.maxSize.width; aDesiredSize.height = state.maxCellVertSpace; #ifdef NS_DEBUG PostReflowCheck(aStatus); #endif if (gsDebug1==PR_TRUE) { if (nsnull!=aDesiredSize.maxElementSize) printf("nsTableRowFrame::RR returning: %s with aDesiredSize=%d,%d, aMES=%d,%d\n", NS_FRAME_IS_COMPLETE(aStatus)?"Complete":"Not Complete", aDesiredSize.width, aDesiredSize.height, aDesiredSize.maxElementSize->width, aDesiredSize.maxElementSize->height); else printf("nsTableRowFrame::RR returning: %s with aDesiredSize=%d,%d, aMES=NSNULL\n", NS_FRAME_IS_COMPLETE(aStatus)?"Complete":"Not Complete", aDesiredSize.width, aDesiredSize.height); } return NS_OK; } NS_METHOD nsTableRowFrame::CreateContinuingFrame(nsIPresContext* aPresContext, nsIFrame* aParent, nsIStyleContext* aStyleContext, nsIFrame*& aContinuingFrame) { if (gsDebug1==PR_TRUE) printf("nsTableRowFrame::CreateContinuingFrame\n"); nsTableRowFrame* cf = new nsTableRowFrame(mContent, aParent); if (nsnull == cf) { return NS_ERROR_OUT_OF_MEMORY; } PrepareContinuingFrame(aPresContext, aParent, aStyleContext, cf); aContinuingFrame = cf; return NS_OK; } nsresult nsTableRowFrame::NewFrame( nsIFrame** aInstancePtrResult, nsIContent* aContent, nsIFrame* aParent) { NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr"); if (nsnull == aInstancePtrResult) { return NS_ERROR_NULL_POINTER; } nsIFrame* it = new nsTableRowFrame(aContent, aParent); if (nsnull == it) { return NS_ERROR_OUT_OF_MEMORY; } *aInstancePtrResult = it; return NS_OK; } // For Debugging ONLY NS_METHOD nsTableRowFrame::MoveTo(nscoord aX, nscoord aY) { if ((aX != mRect.x) || (aY != mRect.y)) { mRect.x = aX; mRect.y = aY; nsIView* view; GetView(view); // Let the view know if (nsnull != view) { // Position view relative to it's parent, not relative to our // parent frame (our parent frame may not have a view). nsIView* parentWithView; nsPoint origin; GetOffsetFromView(origin, parentWithView); view->SetPosition(origin.x, origin.y); NS_IF_RELEASE(parentWithView); } } return NS_OK; } NS_METHOD nsTableRowFrame::SizeTo(nscoord aWidth, nscoord aHeight) { mRect.width = aWidth; mRect.height = aHeight; nsIView* view; GetView(view); // Let the view know if (nsnull != view) { view->SetDimensions(aWidth, aHeight); } return NS_OK; }