/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "nsCOMPtr.h" #include "nsTableRowGroupFrame.h" #include "nsTableRowFrame.h" #include "nsTableFrame.h" #include "nsTableCellFrame.h" #include "nsPresContext.h" #include "nsStyleContext.h" #include "nsStyleConsts.h" #include "nsIContent.h" #include "nsGkAtoms.h" #include "nsIPresShell.h" #include "nsCSSRendering.h" #include "nsHTMLParts.h" #include "nsCSSFrameConstructor.h" #include "nsDisplayList.h" #include "nsCellMap.h"//table cell navigation #include using namespace mozilla; using namespace mozilla::layout; nsTableRowGroupFrame::nsTableRowGroupFrame(nsStyleContext* aContext): nsContainerFrame(aContext) { SetRepeatable(false); } nsTableRowGroupFrame::~nsTableRowGroupFrame() { } NS_QUERYFRAME_HEAD(nsTableRowGroupFrame) NS_QUERYFRAME_ENTRY(nsTableRowGroupFrame) NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame) int32_t nsTableRowGroupFrame::GetRowCount() { #ifdef DEBUG for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) { NS_ASSERTION(e.get()->StyleDisplay()->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW, "Unexpected display"); NS_ASSERTION(e.get()->GetType() == nsGkAtoms::tableRowFrame, "Unexpected frame type"); } #endif return mFrames.GetLength(); } int32_t nsTableRowGroupFrame::GetStartRowIndex() { int32_t result = -1; if (mFrames.NotEmpty()) { NS_ASSERTION(mFrames.FirstChild()->GetType() == nsGkAtoms::tableRowFrame, "Unexpected frame type"); result = static_cast(mFrames.FirstChild())->GetRowIndex(); } // if the row group doesn't have any children, get it the hard way if (-1 == result) { nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); return tableFrame->GetStartRowIndex(this); } return result; } void nsTableRowGroupFrame::AdjustRowIndices(int32_t aRowIndex, int32_t anAdjustment) { nsIFrame* rowFrame = GetFirstPrincipalChild(); for ( ; rowFrame; rowFrame = rowFrame->GetNextSibling()) { if (NS_STYLE_DISPLAY_TABLE_ROW==rowFrame->StyleDisplay()->mDisplay) { int32_t index = ((nsTableRowFrame*)rowFrame)->GetRowIndex(); if (index >= aRowIndex) ((nsTableRowFrame *)rowFrame)->SetRowIndex(index+anAdjustment); } } } nsresult nsTableRowGroupFrame::InitRepeatedFrame(nsPresContext* aPresContext, nsTableRowGroupFrame* aHeaderFooterFrame) { nsTableRowFrame* copyRowFrame = GetFirstRow(); nsTableRowFrame* originalRowFrame = aHeaderFooterFrame->GetFirstRow(); AddStateBits(NS_REPEATED_ROW_OR_ROWGROUP); while (copyRowFrame && originalRowFrame) { copyRowFrame->AddStateBits(NS_REPEATED_ROW_OR_ROWGROUP); int rowIndex = originalRowFrame->GetRowIndex(); copyRowFrame->SetRowIndex(rowIndex); // For each table cell frame set its column index nsTableCellFrame* originalCellFrame = originalRowFrame->GetFirstCell(); nsTableCellFrame* copyCellFrame = copyRowFrame->GetFirstCell(); while (copyCellFrame && originalCellFrame) { NS_ASSERTION(originalCellFrame->GetContent() == copyCellFrame->GetContent(), "cell frames have different content"); int32_t colIndex; originalCellFrame->GetColIndex(colIndex); copyCellFrame->SetColIndex(colIndex); // Move to the next cell frame copyCellFrame = copyCellFrame->GetNextCell(); originalCellFrame = originalCellFrame->GetNextCell(); } // Move to the next row frame originalRowFrame = originalRowFrame->GetNextRow(); copyRowFrame = copyRowFrame->GetNextRow(); } return NS_OK; } /** * We need a custom display item for table row backgrounds. This is only used * when the table row is the root of a stacking context (e.g., has 'opacity'). * Table row backgrounds can extend beyond the row frame bounds, when * the row contains row-spanning cells. */ class nsDisplayTableRowGroupBackground : public nsDisplayTableItem { public: nsDisplayTableRowGroupBackground(nsDisplayListBuilder* aBuilder, nsTableRowGroupFrame* aFrame) : nsDisplayTableItem(aBuilder, aFrame) { MOZ_COUNT_CTOR(nsDisplayTableRowGroupBackground); } #ifdef NS_BUILD_REFCNT_LOGGING virtual ~nsDisplayTableRowGroupBackground() { MOZ_COUNT_DTOR(nsDisplayTableRowGroupBackground); } #endif virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion *aInvalidRegion) MOZ_OVERRIDE; virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx); NS_DISPLAY_DECL_NAME("TableRowGroupBackground", TYPE_TABLE_ROW_GROUP_BACKGROUND) }; void nsDisplayTableRowGroupBackground::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion *aInvalidRegion) { if (aBuilder->ShouldSyncDecodeImages()) { if (nsTableFrame::AnyTablePartHasUndecodedBackgroundImage(mFrame, mFrame->GetNextSibling())) { bool snap; aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap)); } } nsDisplayTableItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion); } void nsDisplayTableRowGroupBackground::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(mFrame); TableBackgroundPainter painter(tableFrame, TableBackgroundPainter::eOrigin_TableRowGroup, mFrame->PresContext(), *aCtx, mVisibleRect, ToReferenceFrame(), aBuilder->GetBackgroundPaintFlags()); painter.PaintRowGroup(static_cast(mFrame)); } // Handle the child-traversal part of DisplayGenericTablePart static void DisplayRows(nsDisplayListBuilder* aBuilder, nsFrame* aFrame, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nscoord overflowAbove; nsTableRowGroupFrame* f = static_cast(aFrame); // Don't try to use the row cursor if we have to descend into placeholders; // we might have rows containing placeholders, where the row's overflow // area doesn't intersect the dirty rect but we need to descend into the row // to see out of flows. // Note that we really want to check ShouldDescendIntoFrame for all // the rows in |f|, but that's exactly what we're trying to avoid, so we // approximate it by checking it for |f|: if it's true for any row // in |f| then it's true for |f| itself. nsIFrame* kid = aBuilder->ShouldDescendIntoFrame(f) ? nullptr : f->GetFirstRowContaining(aDirtyRect.y, &overflowAbove); if (kid) { // have a cursor, use it while (kid) { if (kid->GetRect().y - overflowAbove >= aDirtyRect.YMost()) break; f->BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists); kid = kid->GetNextSibling(); } return; } // No cursor. Traverse children the hard way and build a cursor while we're at it nsTableRowGroupFrame::FrameCursorData* cursor = f->SetupRowCursor(); kid = f->GetFirstPrincipalChild(); while (kid) { f->BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists); if (cursor) { if (!cursor->AppendFrame(kid)) { f->ClearRowCursor(); return; } } kid = kid->GetNextSibling(); } if (cursor) { cursor->FinishBuildingCursor(); } } void nsTableRowGroupFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsDisplayTableItem* item = nullptr; if (IsVisibleInSelection(aBuilder)) { bool isRoot = aBuilder->IsAtRootOfPseudoStackingContext(); if (isRoot) { // This background is created regardless of whether this frame is // visible or not. Visibility decisions are delegated to the // table background painter. item = new (aBuilder) nsDisplayTableRowGroupBackground(aBuilder, this); aLists.BorderBackground()->AppendNewToTop(item); } } nsTableFrame::DisplayGenericTablePart(aBuilder, this, aDirtyRect, aLists, item, DisplayRows); } int nsTableRowGroupFrame::GetSkipSides(const nsHTMLReflowState* aReflowState) const { int skip = 0; if (nullptr != GetPrevInFlow()) { skip |= 1 << NS_SIDE_TOP; } if (nullptr != GetNextInFlow()) { skip |= 1 << NS_SIDE_BOTTOM; } return skip; } // Position and size aKidFrame and update our reflow state. The origin of // aKidRect is relative to the upper-left origin of our frame void nsTableRowGroupFrame::PlaceChild(nsPresContext* aPresContext, nsRowGroupReflowState& aReflowState, nsIFrame* aKidFrame, nsHTMLReflowMetrics& aDesiredSize, const nsRect& aOriginalKidRect, const nsRect& aOriginalKidVisualOverflow) { bool isFirstReflow = (aKidFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) != 0; // Place and size the child FinishReflowChild(aKidFrame, aPresContext, aDesiredSize, nullptr, 0, aReflowState.y, 0); nsTableFrame::InvalidateTableFrame(aKidFrame, aOriginalKidRect, aOriginalKidVisualOverflow, isFirstReflow); // Adjust the running y-offset aReflowState.y += aDesiredSize.Height(); // If our height is constrained then update the available height if (NS_UNCONSTRAINEDSIZE != aReflowState.availSize.height) { aReflowState.availSize.height -= aDesiredSize.Height(); } } void nsTableRowGroupFrame::InitChildReflowState(nsPresContext& aPresContext, bool aBorderCollapse, nsHTMLReflowState& aReflowState) { nsMargin collapseBorder; nsMargin padding(0,0,0,0); nsMargin* pCollapseBorder = nullptr; if (aBorderCollapse) { nsTableRowFrame *rowFrame = do_QueryFrame(aReflowState.frame); if (rowFrame) { pCollapseBorder = rowFrame->GetBCBorderWidth(collapseBorder); } } aReflowState.Init(&aPresContext, -1, -1, pCollapseBorder, &padding); } static void CacheRowHeightsForPrinting(nsPresContext* aPresContext, nsTableRowFrame* aFirstRow) { for (nsTableRowFrame* row = aFirstRow; row; row = row->GetNextRow()) { if (!row->GetPrevInFlow()) { row->SetHasUnpaginatedHeight(true); row->SetUnpaginatedHeight(aPresContext, row->GetSize().height); } } } nsresult nsTableRowGroupFrame::ReflowChildren(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, nsRowGroupReflowState& aReflowState, nsReflowStatus& aStatus, bool* aPageBreakBeforeEnd) { if (aPageBreakBeforeEnd) *aPageBreakBeforeEnd = false; nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); nsresult rv = NS_OK; const bool borderCollapse = tableFrame->IsBorderCollapse(); nscoord cellSpacingY = tableFrame->GetCellSpacingY(); // XXXldb Should we really be checking this rather than available height? // (Think about multi-column layout!) bool isPaginated = aPresContext->IsPaginated() && NS_UNCONSTRAINEDSIZE != aReflowState.availSize.height; bool haveRow = false; bool reflowAllKids = aReflowState.reflowState.ShouldReflowAllKids() || tableFrame->IsGeometryDirty(); bool needToCalcRowHeights = reflowAllKids; nsIFrame *prevKidFrame = nullptr; for (nsIFrame* kidFrame = mFrames.FirstChild(); kidFrame; prevKidFrame = kidFrame, kidFrame = kidFrame->GetNextSibling()) { nsTableRowFrame *rowFrame = do_QueryFrame(kidFrame); if (!rowFrame) { // XXXldb nsCSSFrameConstructor needs to enforce this! NS_NOTREACHED("yikes, a non-row child"); continue; } haveRow = true; // Reflow the row frame if (reflowAllKids || NS_SUBTREE_DIRTY(kidFrame) || (aReflowState.reflowState.mFlags.mSpecialHeightReflow && (isPaginated || (kidFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT)))) { nsRect oldKidRect = kidFrame->GetRect(); nsRect oldKidVisualOverflow = kidFrame->GetVisualOverflowRect(); // XXXldb We used to only pass aDesiredSize.mFlags through for the // incremental reflow codepath. nsHTMLReflowMetrics desiredSize(aReflowState.reflowState.GetWritingMode(), aDesiredSize.mFlags); desiredSize.Width() = desiredSize.Height() = 0; // Reflow the child into the available space, giving it as much height as // it wants. We'll deal with splitting later after we've computed the row // heights, taking into account cells with row spans... nsSize kidAvailSize(aReflowState.availSize.width, NS_UNCONSTRAINEDSIZE); nsHTMLReflowState kidReflowState(aPresContext, aReflowState.reflowState, kidFrame, kidAvailSize, -1, -1, nsHTMLReflowState::CALLER_WILL_INIT); InitChildReflowState(*aPresContext, borderCollapse, kidReflowState); // This can indicate that columns were resized. if (aReflowState.reflowState.mFlags.mHResize) kidReflowState.mFlags.mHResize = true; NS_ASSERTION(kidFrame == mFrames.FirstChild() || prevKidFrame, "If we're not on the first frame, we should have a " "previous sibling..."); // If prev row has nonzero YMost, then we can't be at the top of the page if (prevKidFrame && prevKidFrame->GetRect().YMost() > 0) { kidReflowState.mFlags.mIsTopOfPage = false; } rv = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, 0, aReflowState.y, 0, aStatus); // Place the child PlaceChild(aPresContext, aReflowState, kidFrame, desiredSize, oldKidRect, oldKidVisualOverflow); aReflowState.y += cellSpacingY; if (!reflowAllKids) { if (IsSimpleRowFrame(aReflowState.tableFrame, kidFrame)) { // Inform the row of its new height. rowFrame->DidResize(); // the overflow area may have changed inflate the overflow area const nsStylePosition *stylePos = StylePosition(); nsStyleUnit unit = stylePos->mHeight.GetUnit(); if (aReflowState.tableFrame->IsAutoHeight() && unit != eStyleUnit_Coord) { // Because other cells in the row may need to be aligned // differently, repaint the entire row nsRect kidRect(0, aReflowState.y, desiredSize.Width(), desiredSize.Height()); InvalidateFrame(); } else if (oldKidRect.height != desiredSize.Height()) needToCalcRowHeights = true; } else { needToCalcRowHeights = true; } } if (isPaginated && aPageBreakBeforeEnd && !*aPageBreakBeforeEnd) { nsTableRowFrame* nextRow = rowFrame->GetNextRow(); if (nextRow) { *aPageBreakBeforeEnd = nsTableFrame::PageBreakAfter(kidFrame, nextRow); } } } else { SlideChild(aReflowState, kidFrame); // Adjust the running y-offset so we know where the next row should be placed nscoord height = kidFrame->GetSize().height + cellSpacingY; aReflowState.y += height; if (NS_UNCONSTRAINEDSIZE != aReflowState.availSize.height) { aReflowState.availSize.height -= height; } } ConsiderChildOverflow(aDesiredSize.mOverflowAreas, kidFrame); } if (haveRow) aReflowState.y -= cellSpacingY; // Return our desired rect aDesiredSize.Width() = aReflowState.reflowState.AvailableWidth(); aDesiredSize.Height() = aReflowState.y; if (aReflowState.reflowState.mFlags.mSpecialHeightReflow) { DidResizeRows(aDesiredSize); if (isPaginated) { CacheRowHeightsForPrinting(aPresContext, GetFirstRow()); } } else if (needToCalcRowHeights) { CalculateRowHeights(aPresContext, aDesiredSize, aReflowState.reflowState); if (!reflowAllKids) { InvalidateFrame(); } } return rv; } nsTableRowFrame* nsTableRowGroupFrame::GetFirstRow() { for (nsIFrame* childFrame = mFrames.FirstChild(); childFrame; childFrame = childFrame->GetNextSibling()) { nsTableRowFrame *rowFrame = do_QueryFrame(childFrame); if (rowFrame) { return rowFrame; } } return nullptr; } struct RowInfo { RowInfo() { height = pctHeight = hasStyleHeight = hasPctHeight = isSpecial = 0; } unsigned height; // content height or fixed height, excluding pct height unsigned pctHeight:29; // pct height unsigned hasStyleHeight:1; unsigned hasPctHeight:1; unsigned isSpecial:1; // there is no cell originating in the row with rowspan=1 and there are at // least 2 cells spanning the row and there is no style height on the row }; static void UpdateHeights(RowInfo& aRowInfo, nscoord aAdditionalHeight, nscoord& aTotal, nscoord& aUnconstrainedTotal) { aRowInfo.height += aAdditionalHeight; aTotal += aAdditionalHeight; if (!aRowInfo.hasStyleHeight) { aUnconstrainedTotal += aAdditionalHeight; } } void nsTableRowGroupFrame::DidResizeRows(nsHTMLReflowMetrics& aDesiredSize) { // update the cells spanning rows with their new heights // this is the place where all of the cells in the row get set to the height of the row // Reset the overflow area aDesiredSize.mOverflowAreas.Clear(); for (nsTableRowFrame* rowFrame = GetFirstRow(); rowFrame; rowFrame = rowFrame->GetNextRow()) { rowFrame->DidResize(); ConsiderChildOverflow(aDesiredSize.mOverflowAreas, rowFrame); } } // This calculates the height of all the rows and takes into account // style height on the row group, style heights on rows and cells, style heights on rowspans. // Actual row heights will be adjusted later if the table has a style height. // Even if rows don't change height, this method must be called to set the heights of each // cell in the row to the height of its row. void nsTableRowGroupFrame::CalculateRowHeights(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState) { nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); const bool isPaginated = aPresContext->IsPaginated(); // all table cells have the same top and bottom margins, namely cellSpacingY nscoord cellSpacingY = tableFrame->GetCellSpacingY(); int32_t numEffCols = tableFrame->GetEffectiveColCount(); int32_t startRowIndex = GetStartRowIndex(); // find the row corresponding to the row index we just found nsTableRowFrame* startRowFrame = GetFirstRow(); if (!startRowFrame) return; // the current row group height is the y origin of the 1st row we are about to calculated a height for nscoord startRowGroupHeight = startRowFrame->GetPosition().y; int32_t numRows = GetRowCount() - (startRowFrame->GetRowIndex() - GetStartRowIndex()); // collect the current height of each row. nscoord* rowHeights = nullptr; if (numRows <= 0) return; nsTArray rowInfo; if (!rowInfo.AppendElements(numRows)) { return; } bool hasRowSpanningCell = false; nscoord heightOfRows = 0; nscoord heightOfUnStyledRows = 0; // Get the height of each row without considering rowspans. This will be the max of // the largest desired height of each cell, the largest style height of each cell, // the style height of the row. nscoord pctHeightBasis = GetHeightBasis(aReflowState); int32_t rowIndex; // the index in rowInfo, not among the rows in the row group nsTableRowFrame* rowFrame; for (rowFrame = startRowFrame, rowIndex = 0; rowFrame; rowFrame = rowFrame->GetNextRow(), rowIndex++) { nscoord nonPctHeight = rowFrame->GetContentHeight(); if (isPaginated) { nonPctHeight = std::max(nonPctHeight, rowFrame->GetSize().height); } if (!rowFrame->GetPrevInFlow()) { if (rowFrame->HasPctHeight()) { rowInfo[rowIndex].hasPctHeight = true; rowInfo[rowIndex].pctHeight = rowFrame->GetHeight(pctHeightBasis); } rowInfo[rowIndex].hasStyleHeight = rowFrame->HasStyleHeight(); nonPctHeight = std::max(nonPctHeight, rowFrame->GetFixedHeight()); } UpdateHeights(rowInfo[rowIndex], nonPctHeight, heightOfRows, heightOfUnStyledRows); if (!rowInfo[rowIndex].hasStyleHeight) { if (isPaginated || tableFrame->HasMoreThanOneCell(rowIndex + startRowIndex)) { rowInfo[rowIndex].isSpecial = true; // iteratate the row's cell frames to see if any do not have rowspan > 1 nsTableCellFrame* cellFrame = rowFrame->GetFirstCell(); while (cellFrame) { int32_t rowSpan = tableFrame->GetEffectiveRowSpan(rowIndex + startRowIndex, *cellFrame); if (1 == rowSpan) { rowInfo[rowIndex].isSpecial = false; break; } cellFrame = cellFrame->GetNextCell(); } } } // See if a cell spans into the row. If so we'll have to do the next step if (!hasRowSpanningCell) { if (tableFrame->RowIsSpannedInto(rowIndex + startRowIndex, numEffCols)) { hasRowSpanningCell = true; } } } if (hasRowSpanningCell) { // Get the height of cells with rowspans and allocate any extra space to the rows they span // iteratate the child frames and process the row frames among them for (rowFrame = startRowFrame, rowIndex = 0; rowFrame; rowFrame = rowFrame->GetNextRow(), rowIndex++) { // See if the row has an originating cell with rowspan > 1. We cannot determine this for a row in a // continued row group by calling RowHasSpanningCells, because the row's fif may not have any originating // cells yet the row may have a continued cell which originates in it. if (GetPrevInFlow() || tableFrame->RowHasSpanningCells(startRowIndex + rowIndex, numEffCols)) { nsTableCellFrame* cellFrame = rowFrame->GetFirstCell(); // iteratate the row's cell frames while (cellFrame) { int32_t rowSpan = tableFrame->GetEffectiveRowSpan(rowIndex + startRowIndex, *cellFrame); if ((rowIndex + rowSpan) > numRows) { // there might be rows pushed already to the nextInFlow rowSpan = numRows - rowIndex; } if (rowSpan > 1) { // a cell with rowspan > 1, determine the height of the rows it spans nscoord heightOfRowsSpanned = 0; nscoord heightOfUnStyledRowsSpanned = 0; nscoord numSpecialRowsSpanned = 0; nscoord cellSpacingTotal = 0; int32_t spanX; for (spanX = 0; spanX < rowSpan; spanX++) { heightOfRowsSpanned += rowInfo[rowIndex + spanX].height; if (!rowInfo[rowIndex + spanX].hasStyleHeight) { heightOfUnStyledRowsSpanned += rowInfo[rowIndex + spanX].height; } if (0 != spanX) { cellSpacingTotal += cellSpacingY; } if (rowInfo[rowIndex + spanX].isSpecial) { numSpecialRowsSpanned++; } } nscoord heightOfAreaSpanned = heightOfRowsSpanned + cellSpacingTotal; // get the height of the cell nsSize cellFrameSize = cellFrame->GetSize(); nsSize cellDesSize = cellFrame->GetDesiredSize(); rowFrame->CalculateCellActualHeight(cellFrame, cellDesSize.height); cellFrameSize.height = cellDesSize.height; if (cellFrame->HasVerticalAlignBaseline()) { // to ensure that a spanning cell with a long descender doesn't // collide with the next row, we need to take into account the shift // that will be done to align the cell on the baseline of the row. cellFrameSize.height += rowFrame->GetMaxCellAscent() - cellFrame->GetCellBaseline(); } if (heightOfAreaSpanned < cellFrameSize.height) { // the cell's height is larger than the available space of the rows it // spans so distribute the excess height to the rows affected nscoord extra = cellFrameSize.height - heightOfAreaSpanned; nscoord extraUsed = 0; if (0 == numSpecialRowsSpanned) { //NS_ASSERTION(heightOfRowsSpanned > 0, "invalid row span situation"); bool haveUnStyledRowsSpanned = (heightOfUnStyledRowsSpanned > 0); nscoord divisor = (haveUnStyledRowsSpanned) ? heightOfUnStyledRowsSpanned : heightOfRowsSpanned; if (divisor > 0) { for (spanX = rowSpan - 1; spanX >= 0; spanX--) { if (!haveUnStyledRowsSpanned || !rowInfo[rowIndex + spanX].hasStyleHeight) { // The amount of additional space each row gets is proportional to its height float percent = ((float)rowInfo[rowIndex + spanX].height) / ((float)divisor); // give rows their percentage, except for the first row which gets the remainder nscoord extraForRow = (0 == spanX) ? extra - extraUsed : NSToCoordRound(((float)(extra)) * percent); extraForRow = std::min(extraForRow, extra - extraUsed); // update the row height UpdateHeights(rowInfo[rowIndex + spanX], extraForRow, heightOfRows, heightOfUnStyledRows); extraUsed += extraForRow; if (extraUsed >= extra) { NS_ASSERTION((extraUsed == extra), "invalid row height calculation"); break; } } } } else { // put everything in the last row UpdateHeights(rowInfo[rowIndex + rowSpan - 1], extra, heightOfRows, heightOfUnStyledRows); } } else { // give the extra to the special rows nscoord numSpecialRowsAllocated = 0; for (spanX = rowSpan - 1; spanX >= 0; spanX--) { if (rowInfo[rowIndex + spanX].isSpecial) { // The amount of additional space each degenerate row gets is proportional to the number of them float percent = 1.0f / ((float)numSpecialRowsSpanned); // give rows their percentage, except for the first row which gets the remainder nscoord extraForRow = (numSpecialRowsSpanned - 1 == numSpecialRowsAllocated) ? extra - extraUsed : NSToCoordRound(((float)(extra)) * percent); extraForRow = std::min(extraForRow, extra - extraUsed); // update the row height UpdateHeights(rowInfo[rowIndex + spanX], extraForRow, heightOfRows, heightOfUnStyledRows); extraUsed += extraForRow; if (extraUsed >= extra) { NS_ASSERTION((extraUsed == extra), "invalid row height calculation"); break; } } } } } } // if (rowSpan > 1) cellFrame = cellFrame->GetNextCell(); } // while (cellFrame) } // if (tableFrame->RowHasSpanningCells(startRowIndex + rowIndex) { } // while (rowFrame) } // pct height rows have already got their content heights. Give them their pct heights up to pctHeightBasis nscoord extra = pctHeightBasis - heightOfRows; for (rowFrame = startRowFrame, rowIndex = 0; rowFrame && (extra > 0); rowFrame = rowFrame->GetNextRow(), rowIndex++) { RowInfo& rInfo = rowInfo[rowIndex]; if (rInfo.hasPctHeight) { nscoord rowExtra = (rInfo.pctHeight > rInfo.height) ? rInfo.pctHeight - rInfo.height: 0; rowExtra = std::min(rowExtra, extra); UpdateHeights(rInfo, rowExtra, heightOfRows, heightOfUnStyledRows); extra -= rowExtra; } } bool styleHeightAllocation = false; nscoord rowGroupHeight = startRowGroupHeight + heightOfRows + ((numRows - 1) * cellSpacingY); // if we have a style height, allocate the extra height to unconstrained rows if ((aReflowState.ComputedHeight() > rowGroupHeight) && (NS_UNCONSTRAINEDSIZE != aReflowState.ComputedHeight())) { nscoord extraComputedHeight = aReflowState.ComputedHeight() - rowGroupHeight; nscoord extraUsed = 0; bool haveUnStyledRows = (heightOfUnStyledRows > 0); nscoord divisor = (haveUnStyledRows) ? heightOfUnStyledRows : heightOfRows; if (divisor > 0) { styleHeightAllocation = true; for (rowIndex = 0; rowIndex < numRows; rowIndex++) { if (!haveUnStyledRows || !rowInfo[rowIndex].hasStyleHeight) { // The amount of additional space each row gets is based on the // percentage of space it occupies float percent = ((float)rowInfo[rowIndex].height) / ((float)divisor); // give rows their percentage, except for the last row which gets the remainder nscoord extraForRow = (numRows - 1 == rowIndex) ? extraComputedHeight - extraUsed : NSToCoordRound(((float)extraComputedHeight) * percent); extraForRow = std::min(extraForRow, extraComputedHeight - extraUsed); // update the row height UpdateHeights(rowInfo[rowIndex], extraForRow, heightOfRows, heightOfUnStyledRows); extraUsed += extraForRow; if (extraUsed >= extraComputedHeight) { NS_ASSERTION((extraUsed == extraComputedHeight), "invalid row height calculation"); break; } } } } rowGroupHeight = aReflowState.ComputedHeight(); } nscoord yOrigin = startRowGroupHeight; // update the rows with their (potentially) new heights for (rowFrame = startRowFrame, rowIndex = 0; rowFrame; rowFrame = rowFrame->GetNextRow(), rowIndex++) { nsRect rowBounds = rowFrame->GetRect(); nsRect rowVisualOverflow = rowFrame->GetVisualOverflowRect(); bool movedFrame = (rowBounds.y != yOrigin); nscoord rowHeight = (rowInfo[rowIndex].height > 0) ? rowInfo[rowIndex].height : 0; if (movedFrame || (rowHeight != rowBounds.height)) { // Resize/move the row to its final size and position if (movedFrame) { rowFrame->InvalidateFrameSubtree(); } rowFrame->SetRect(nsRect(rowBounds.x, yOrigin, rowBounds.width, rowHeight)); nsTableFrame::InvalidateTableFrame(rowFrame, rowBounds, rowVisualOverflow, false); } if (movedFrame) { nsTableFrame::RePositionViews(rowFrame); // XXXbz we don't need to update our overflow area? } yOrigin += rowHeight + cellSpacingY; } if (isPaginated && styleHeightAllocation) { // since the row group has a style height, cache the row heights, so next in flows can honor them CacheRowHeightsForPrinting(aPresContext, GetFirstRow()); } DidResizeRows(aDesiredSize); aDesiredSize.Height() = rowGroupHeight; // Adjust our desired size } nscoord nsTableRowGroupFrame::CollapseRowGroupIfNecessary(nscoord aYTotalOffset, nscoord aWidth) { nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); const nsStyleVisibility* groupVis = StyleVisibility(); bool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE == groupVis->mVisible); if (collapseGroup) { tableFrame->SetNeedToCollapse(true); } nsOverflowAreas overflow; nsTableRowFrame* rowFrame= GetFirstRow(); bool didCollapse = false; nscoord yGroupOffset = 0; while (rowFrame) { yGroupOffset += rowFrame->CollapseRowIfNecessary(yGroupOffset, aWidth, collapseGroup, didCollapse); ConsiderChildOverflow(overflow, rowFrame); rowFrame = rowFrame->GetNextRow(); } nsRect groupRect = GetRect(); nsRect oldGroupRect = groupRect; nsRect oldGroupVisualOverflow = GetVisualOverflowRect(); groupRect.height -= yGroupOffset; if (didCollapse) { // add back the cellspacing between rowgroups groupRect.height += tableFrame->GetCellSpacingY(); } groupRect.y -= aYTotalOffset; groupRect.width = aWidth; if (aYTotalOffset != 0) { InvalidateFrameSubtree(); } SetRect(groupRect); overflow.UnionAllWith(nsRect(0, 0, groupRect.width, groupRect.height)); FinishAndStoreOverflow(overflow, groupRect.Size()); nsTableFrame::RePositionViews(this); nsTableFrame::InvalidateTableFrame(this, oldGroupRect, oldGroupVisualOverflow, false); return yGroupOffset; } // Move a child that was skipped during a reflow. void nsTableRowGroupFrame::SlideChild(nsRowGroupReflowState& aReflowState, nsIFrame* aKidFrame) { // Move the frame if we need to nsPoint oldPosition = aKidFrame->GetPosition(); nsPoint newPosition = oldPosition; newPosition.y = aReflowState.y; if (oldPosition.y != newPosition.y) { aKidFrame->InvalidateFrameSubtree(); aKidFrame->SetPosition(newPosition); nsTableFrame::RePositionViews(aKidFrame); aKidFrame->InvalidateFrameSubtree(); } } // Create a continuing frame, add it to the child list, and then push it // and the frames that follow void nsTableRowGroupFrame::CreateContinuingRowFrame(nsPresContext& aPresContext, nsIFrame& aRowFrame, nsIFrame** aContRowFrame) { // XXX what is the row index? if (!aContRowFrame) {NS_ASSERTION(false, "bad call"); return;} // create the continuing frame which will create continuing cell frames *aContRowFrame = aPresContext.PresShell()->FrameConstructor()-> CreateContinuingFrame(&aPresContext, &aRowFrame, this); // Add the continuing row frame to the child list mFrames.InsertFrame(nullptr, &aRowFrame, *aContRowFrame); // Push the continuing row frame and the frames that follow PushChildren(*aContRowFrame, &aRowFrame); } // Reflow the cells with rowspan > 1 which originate between aFirstRow // and end on or after aLastRow. aFirstTruncatedRow is the highest row on the // page that contains a cell which cannot split on this page void nsTableRowGroupFrame::SplitSpanningCells(nsPresContext& aPresContext, const nsHTMLReflowState& aReflowState, nsTableFrame& aTable, nsTableRowFrame& aFirstRow, nsTableRowFrame& aLastRow, bool aFirstRowIsTopOfPage, nscoord aSpanningRowBottom, nsTableRowFrame*& aContRow, nsTableRowFrame*& aFirstTruncatedRow, nscoord& aDesiredHeight) { NS_ASSERTION(aSpanningRowBottom >= 0, "Can't split negative heights"); aFirstTruncatedRow = nullptr; aDesiredHeight = 0; const bool borderCollapse = aTable.IsBorderCollapse(); int32_t lastRowIndex = aLastRow.GetRowIndex(); bool wasLast = false; bool haveRowSpan = false; // Iterate the rows between aFirstRow and aLastRow for (nsTableRowFrame* row = &aFirstRow; !wasLast; row = row->GetNextRow()) { wasLast = (row == &aLastRow); int32_t rowIndex = row->GetRowIndex(); nsPoint rowPos = row->GetPosition(); // Iterate the cells looking for those that have rowspan > 1 for (nsTableCellFrame* cell = row->GetFirstCell(); cell; cell = cell->GetNextCell()) { int32_t rowSpan = aTable.GetEffectiveRowSpan(rowIndex, *cell); // Only reflow rowspan > 1 cells which span aLastRow. Those which don't span aLastRow // were reflowed correctly during the unconstrained height reflow. if ((rowSpan > 1) && (rowIndex + rowSpan > lastRowIndex)) { haveRowSpan = true; nsReflowStatus status; // Ask the row to reflow the cell to the height of all the rows it spans up through aLastRow // aAvailHeight is the space between the row group start and the end of the page nscoord cellAvailHeight = aSpanningRowBottom - rowPos.y; NS_ASSERTION(cellAvailHeight >= 0, "No space for cell?"); bool isTopOfPage = (row == &aFirstRow) && aFirstRowIsTopOfPage; nsRect rowRect = row->GetRect(); nsSize rowAvailSize(aReflowState.AvailableWidth(), std::max(aReflowState.AvailableHeight() - rowRect.y, 0)); // don't let the available height exceed what // CalculateRowHeights set for it rowAvailSize.height = std::min(rowAvailSize.height, rowRect.height); nsHTMLReflowState rowReflowState(&aPresContext, aReflowState, row, rowAvailSize, -1, -1, nsHTMLReflowState::CALLER_WILL_INIT); InitChildReflowState(aPresContext, borderCollapse, rowReflowState); rowReflowState.mFlags.mIsTopOfPage = isTopOfPage; // set top of page nscoord cellHeight = row->ReflowCellFrame(&aPresContext, rowReflowState, isTopOfPage, cell, cellAvailHeight, status); aDesiredHeight = std::max(aDesiredHeight, rowPos.y + cellHeight); if (NS_FRAME_IS_COMPLETE(status)) { if (cellHeight > cellAvailHeight) { aFirstTruncatedRow = row; if ((row != &aFirstRow) || !aFirstRowIsTopOfPage) { // return now, since we will be getting another reflow after either (1) row is // moved to the next page or (2) the row group is moved to the next page return; } } } else { if (!aContRow) { CreateContinuingRowFrame(aPresContext, aLastRow, (nsIFrame**)&aContRow); } if (aContRow) { if (row != &aLastRow) { // aContRow needs a continuation for cell, since cell spanned into aLastRow // but does not originate there nsTableCellFrame* contCell = static_cast( aPresContext.PresShell()->FrameConstructor()-> CreateContinuingFrame(&aPresContext, cell, &aLastRow)); int32_t colIndex; cell->GetColIndex(colIndex); aContRow->InsertCellFrame(contCell, colIndex); } } } } } } if (!haveRowSpan) { aDesiredHeight = aLastRow.GetRect().YMost(); } } // Remove the next-in-flow of the row, its cells and their cell blocks. This // is necessary in case the row doesn't need a continuation later on or needs // a continuation which doesn't have the same number of cells that now exist. void nsTableRowGroupFrame::UndoContinuedRow(nsPresContext* aPresContext, nsTableRowFrame* aRow) { if (!aRow) return; // allow null aRow to avoid callers doing null checks // rowBefore was the prev-sibling of aRow's next-sibling before aRow was created nsTableRowFrame* rowBefore = (nsTableRowFrame*)aRow->GetPrevInFlow(); NS_PRECONDITION(mFrames.ContainsFrame(rowBefore), "rowBefore not in our frame list?"); AutoFrameListPtr overflows(aPresContext, StealOverflowFrames()); if (!rowBefore || !overflows || overflows->IsEmpty() || overflows->FirstChild() != aRow) { NS_ERROR("invalid continued row"); return; } // Destroy aRow, its cells, and their cell blocks. Cell blocks that have split // will not have reflowed yet to pick up content from any overflow lines. overflows->DestroyFrame(aRow); // Put the overflow rows into our child list if (!overflows->IsEmpty()) { mFrames.InsertFrames(nullptr, rowBefore, *overflows); } } static nsTableRowFrame* GetRowBefore(nsTableRowFrame& aStartRow, nsTableRowFrame& aRow) { nsTableRowFrame* rowBefore = nullptr; for (nsTableRowFrame* sib = &aStartRow; sib && (sib != &aRow); sib = sib->GetNextRow()) { rowBefore = sib; } return rowBefore; } nsresult nsTableRowGroupFrame::SplitRowGroup(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsTableFrame* aTableFrame, nsReflowStatus& aStatus, bool aRowForcedPageBreak) { NS_PRECONDITION(aPresContext->IsPaginated(), "SplitRowGroup currently supports only paged media"); nsresult rv = NS_OK; nsTableRowFrame* prevRowFrame = nullptr; aDesiredSize.Height() = 0; nscoord availWidth = aReflowState.AvailableWidth(); nscoord availHeight = aReflowState.AvailableHeight(); const bool borderCollapse = aTableFrame->IsBorderCollapse(); nscoord cellSpacingY = aTableFrame->GetCellSpacingY(); // get the page height nscoord pageHeight = aPresContext->GetPageSize().height; NS_ASSERTION(pageHeight != NS_UNCONSTRAINEDSIZE, "The table shouldn't be split when there should be space"); bool isTopOfPage = aReflowState.mFlags.mIsTopOfPage; nsTableRowFrame* firstRowThisPage = GetFirstRow(); // Need to dirty the table's geometry, or else the row might skip // reflowing its cell as an optimization. aTableFrame->SetGeometryDirty(); // Walk each of the row frames looking for the first row frame that doesn't fit // in the available space for (nsTableRowFrame* rowFrame = firstRowThisPage; rowFrame; rowFrame = rowFrame->GetNextRow()) { bool rowIsOnPage = true; nsRect rowRect = rowFrame->GetRect(); // See if the row fits on this page if (rowRect.YMost() > availHeight) { nsTableRowFrame* contRow = nullptr; // Reflow the row in the availabe space and have it split if it is the 1st // row (on the page) or there is at least 5% of the current page available // XXX this 5% should be made a preference if (!prevRowFrame || (availHeight - aDesiredSize.Height() > pageHeight / 20)) { nsSize availSize(availWidth, std::max(availHeight - rowRect.y, 0)); // don't let the available height exceed what CalculateRowHeights set for it availSize.height = std::min(availSize.height, rowRect.height); nsHTMLReflowState rowReflowState(aPresContext, aReflowState, rowFrame, availSize, -1, -1, nsHTMLReflowState::CALLER_WILL_INIT); InitChildReflowState(*aPresContext, borderCollapse, rowReflowState); rowReflowState.mFlags.mIsTopOfPage = isTopOfPage; // set top of page nsHTMLReflowMetrics rowMetrics(aReflowState.GetWritingMode()); // Get the old size before we reflow. nsRect oldRowRect = rowFrame->GetRect(); nsRect oldRowVisualOverflow = rowFrame->GetVisualOverflowRect(); // Reflow the cell with the constrained height. A cell with rowspan >1 will get this // reflow later during SplitSpanningCells. rv = ReflowChild(rowFrame, aPresContext, rowMetrics, rowReflowState, 0, 0, NS_FRAME_NO_MOVE_FRAME, aStatus); if (NS_FAILED(rv)) return rv; rowFrame->SetSize(nsSize(rowMetrics.Width(), rowMetrics.Height())); rowFrame->DidReflow(aPresContext, nullptr, nsDidReflowStatus::FINISHED); rowFrame->DidResize(); if (!aRowForcedPageBreak && !NS_FRAME_IS_FULLY_COMPLETE(aStatus) && ShouldAvoidBreakInside(aReflowState)) { aStatus = NS_INLINE_LINE_BREAK_BEFORE(); break; } nsTableFrame::InvalidateTableFrame(rowFrame, oldRowRect, oldRowVisualOverflow, false); if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) { // The row frame is incomplete and all of the rowspan 1 cells' block frames split if ((rowMetrics.Height() <= rowReflowState.AvailableHeight()) || isTopOfPage) { // The row stays on this page because either it split ok or we're on the top of page. // If top of page and the height exceeded the avail height, then there will be data loss NS_ASSERTION(rowMetrics.Height() <= rowReflowState.AvailableHeight(), "data loss - incomplete row needed more height than available, on top of page"); CreateContinuingRowFrame(*aPresContext, *rowFrame, (nsIFrame**)&contRow); if (contRow) { aDesiredSize.Height() += rowMetrics.Height(); if (prevRowFrame) aDesiredSize.Height() += cellSpacingY; } else return NS_ERROR_NULL_POINTER; } else { // Put the row on the next page to give it more height rowIsOnPage = false; } } else { // The row frame is complete because either (1) its minimum height is greater than the // available height we gave it, or (2) it may have been given a larger height through // style than its content, or (3) it contains a rowspan >1 cell which hasn't been // reflowed with a constrained height yet (we will find out when SplitSpanningCells is // called below) if (rowMetrics.Height() > availSize.height || (NS_INLINE_IS_BREAK_BEFORE(aStatus) && !aRowForcedPageBreak)) { // cases (1) and (2) if (isTopOfPage) { // We're on top of the page, so keep the row on this page. There will be data loss. // Push the row frame that follows nsTableRowFrame* nextRowFrame = rowFrame->GetNextRow(); if (nextRowFrame) { aStatus = NS_FRAME_NOT_COMPLETE; } aDesiredSize.Height() += rowMetrics.Height(); if (prevRowFrame) aDesiredSize.Height() += cellSpacingY; NS_WARNING("data loss - complete row needed more height than available, on top of page"); } else { // We're not on top of the page, so put the row on the next page to give it more height rowIsOnPage = false; } } } } //if (!prevRowFrame || (availHeight - aDesiredSize.Height() > pageHeight / 20)) else { // put the row on the next page to give it more height rowIsOnPage = false; } nsTableRowFrame* lastRowThisPage = rowFrame; nscoord spanningRowBottom = availHeight; if (!rowIsOnPage) { NS_ASSERTION(!contRow, "We should not have created a continuation if none of this row fits"); if (!aRowForcedPageBreak && ShouldAvoidBreakInside(aReflowState)) { aStatus = NS_INLINE_LINE_BREAK_BEFORE(); break; } if (prevRowFrame) { spanningRowBottom = prevRowFrame->GetRect().YMost(); lastRowThisPage = prevRowFrame; isTopOfPage = (lastRowThisPage == firstRowThisPage) && aReflowState.mFlags.mIsTopOfPage; aStatus = NS_FRAME_NOT_COMPLETE; } else { // We can't push children, so let our parent reflow us again with more space aDesiredSize.Height() = rowRect.YMost(); aStatus = NS_FRAME_COMPLETE; break; } } // reflow the cells with rowspan >1 that occur on the page nsTableRowFrame* firstTruncatedRow; nscoord yMost; SplitSpanningCells(*aPresContext, aReflowState, *aTableFrame, *firstRowThisPage, *lastRowThisPage, aReflowState.mFlags.mIsTopOfPage, spanningRowBottom, contRow, firstTruncatedRow, yMost); if (firstTruncatedRow) { // A rowspan >1 cell did not fit (and could not split) in the space we gave it if (firstTruncatedRow == firstRowThisPage) { if (aReflowState.mFlags.mIsTopOfPage) { NS_WARNING("data loss in a row spanned cell"); } else { // We can't push children, so let our parent reflow us again with more space aDesiredSize.Height() = rowRect.YMost(); aStatus = NS_FRAME_COMPLETE; UndoContinuedRow(aPresContext, contRow); contRow = nullptr; } } else { // (firstTruncatedRow != firstRowThisPage) // Try to put firstTruncateRow on the next page nsTableRowFrame* rowBefore = ::GetRowBefore(*firstRowThisPage, *firstTruncatedRow); nscoord oldSpanningRowBottom = spanningRowBottom; spanningRowBottom = rowBefore->GetRect().YMost(); UndoContinuedRow(aPresContext, contRow); contRow = nullptr; nsTableRowFrame* oldLastRowThisPage = lastRowThisPage; lastRowThisPage = rowBefore; aStatus = NS_FRAME_NOT_COMPLETE; // Call SplitSpanningCells again with rowBefore as the last row on the page SplitSpanningCells(*aPresContext, aReflowState, *aTableFrame, *firstRowThisPage, *rowBefore, aReflowState.mFlags.mIsTopOfPage, spanningRowBottom, contRow, firstTruncatedRow, aDesiredSize.Height()); if (firstTruncatedRow) { if (aReflowState.mFlags.mIsTopOfPage) { // We were better off with the 1st call to SplitSpanningCells, do it again UndoContinuedRow(aPresContext, contRow); contRow = nullptr; lastRowThisPage = oldLastRowThisPage; spanningRowBottom = oldSpanningRowBottom; SplitSpanningCells(*aPresContext, aReflowState, *aTableFrame, *firstRowThisPage, *lastRowThisPage, aReflowState.mFlags.mIsTopOfPage, spanningRowBottom, contRow, firstTruncatedRow, aDesiredSize.Height()); NS_WARNING("data loss in a row spanned cell"); } else { // Let our parent reflow us again with more space aDesiredSize.Height() = rowRect.YMost(); aStatus = NS_FRAME_COMPLETE; UndoContinuedRow(aPresContext, contRow); contRow = nullptr; } } } // if (firstTruncatedRow == firstRowThisPage) } // if (firstTruncatedRow) else { aDesiredSize.Height() = std::max(aDesiredSize.Height(), yMost); if (contRow) { aStatus = NS_FRAME_NOT_COMPLETE; } } if (NS_FRAME_IS_NOT_COMPLETE(aStatus) && !contRow) { nsTableRowFrame* nextRow = lastRowThisPage->GetNextRow(); if (nextRow) { PushChildren(nextRow, lastRowThisPage); } } break; } // if (rowRect.YMost() > availHeight) else { aDesiredSize.Height() = rowRect.YMost(); prevRowFrame = rowFrame; // see if there is a page break after the row nsTableRowFrame* nextRow = rowFrame->GetNextRow(); if (nextRow && nsTableFrame::PageBreakAfter(rowFrame, nextRow)) { PushChildren(nextRow, rowFrame); aStatus = NS_FRAME_NOT_COMPLETE; break; } } // after the 1st row that has a height, we can't be on top // of the page anymore. isTopOfPage = isTopOfPage && rowRect.YMost() == 0; } return NS_OK; } /** Layout the entire row group. * This method stacks rows vertically according to HTML 4.0 rules. * Rows are responsible for layout of their children. */ NS_METHOD nsTableRowGroupFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { DO_GLOBAL_REFLOW_COUNT("nsTableRowGroupFrame"); DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus); nsresult rv = NS_OK; aStatus = NS_FRAME_COMPLETE; // Row geometry may be going to change so we need to invalidate any row cursor. ClearRowCursor(); // see if a special height reflow needs to occur due to having a pct height nsTableFrame::CheckRequestSpecialHeightReflow(aReflowState); nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); nsRowGroupReflowState state(aReflowState, tableFrame); const nsStyleVisibility* groupVis = StyleVisibility(); bool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE == groupVis->mVisible); if (collapseGroup) { tableFrame->SetNeedToCollapse(true); } // Check for an overflow list MoveOverflowToChildList(); // Reflow the existing frames. bool splitDueToPageBreak = false; rv = ReflowChildren(aPresContext, aDesiredSize, state, aStatus, &splitDueToPageBreak); // See if all the frames fit. Do not try to split anything if we're // not paginated ... we can't split across columns yet. if (aReflowState.mFlags.mTableIsSplittable && NS_UNCONSTRAINEDSIZE != aReflowState.AvailableHeight() && (NS_FRAME_NOT_COMPLETE == aStatus || splitDueToPageBreak || aDesiredSize.Height() > aReflowState.AvailableHeight())) { // Nope, find a place to split the row group bool specialReflow = (bool)aReflowState.mFlags.mSpecialHeightReflow; ((nsHTMLReflowState::ReflowStateFlags&)aReflowState.mFlags).mSpecialHeightReflow = false; SplitRowGroup(aPresContext, aDesiredSize, aReflowState, tableFrame, aStatus, splitDueToPageBreak); ((nsHTMLReflowState::ReflowStateFlags&)aReflowState.mFlags).mSpecialHeightReflow = specialReflow; } // XXXmats The following is just bogus. We leave it here for now because // ReflowChildren should pull up rows from our next-in-flow before returning // a Complete status, but doesn't (bug 804888). if (GetNextInFlow() && GetNextInFlow()->GetFirstPrincipalChild()) { NS_FRAME_SET_INCOMPLETE(aStatus); } SetHasStyleHeight((NS_UNCONSTRAINEDSIZE != aReflowState.ComputedHeight()) && (aReflowState.ComputedHeight() > 0)); // just set our width to what was available. The table will calculate the width and not use our value. aDesiredSize.Width() = aReflowState.AvailableWidth(); aDesiredSize.UnionOverflowAreasWithDesiredBounds(); // If our parent is in initial reflow, it'll handle invalidating our // entire overflow rect. if (!(GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW) && nsSize(aDesiredSize.Width(), aDesiredSize.Height()) != mRect.Size()) { InvalidateFrame(); } FinishAndStoreOverflow(&aDesiredSize); NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize); return rv; } bool nsTableRowGroupFrame::UpdateOverflow() { // Row cursor invariants depend on the visual overflow area of the rows, // which may have changed, so we need to clear the cursor now. ClearRowCursor(); return nsContainerFrame::UpdateOverflow(); } /* virtual */ void nsTableRowGroupFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext) { nsContainerFrame::DidSetStyleContext(aOldStyleContext); if (!aOldStyleContext) //avoid this on init return; nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); if (tableFrame->IsBorderCollapse() && tableFrame->BCRecalcNeeded(aOldStyleContext, StyleContext())) { nsIntRect damageArea(0, GetStartRowIndex(), tableFrame->GetColCount(), GetRowCount()); tableFrame->AddBCDamageArea(damageArea); } } NS_IMETHODIMP nsTableRowGroupFrame::AppendFrames(ChildListID aListID, nsFrameList& aFrameList) { NS_ASSERTION(aListID == kPrincipalList, "unexpected child list"); ClearRowCursor(); // collect the new row frames in an array // XXXbz why are we doing the QI stuff? There shouldn't be any non-rows here. nsAutoTArray rows; for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) { nsTableRowFrame *rowFrame = do_QueryFrame(e.get()); NS_ASSERTION(rowFrame, "Unexpected frame; frame constructor screwed up"); if (rowFrame) { NS_ASSERTION(NS_STYLE_DISPLAY_TABLE_ROW == e.get()->StyleDisplay()->mDisplay, "wrong display type on rowframe"); rows.AppendElement(rowFrame); } } int32_t rowIndex = GetRowCount(); // Append the frames to the sibling chain mFrames.AppendFrames(nullptr, aFrameList); if (rows.Length() > 0) { nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); tableFrame->AppendRows(this, rowIndex, rows); PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_HAS_DIRTY_CHILDREN); tableFrame->SetGeometryDirty(); } return NS_OK; } NS_IMETHODIMP nsTableRowGroupFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame, nsFrameList& aFrameList) { NS_ASSERTION(aListID == kPrincipalList, "unexpected child list"); NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this, "inserting after sibling frame with different parent"); ClearRowCursor(); // collect the new row frames in an array // XXXbz why are we doing the QI stuff? There shouldn't be any non-rows here. nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); nsTArray rows; bool gotFirstRow = false; for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) { nsTableRowFrame *rowFrame = do_QueryFrame(e.get()); NS_ASSERTION(rowFrame, "Unexpected frame; frame constructor screwed up"); if (rowFrame) { NS_ASSERTION(NS_STYLE_DISPLAY_TABLE_ROW == e.get()->StyleDisplay()->mDisplay, "wrong display type on rowframe"); rows.AppendElement(rowFrame); if (!gotFirstRow) { rowFrame->SetFirstInserted(true); gotFirstRow = true; tableFrame->SetRowInserted(true); } } } int32_t startRowIndex = GetStartRowIndex(); // Insert the frames in the sibling chain mFrames.InsertFrames(nullptr, aPrevFrame, aFrameList); int32_t numRows = rows.Length(); if (numRows > 0) { nsTableRowFrame* prevRow = (nsTableRowFrame *)nsTableFrame::GetFrameAtOrBefore(this, aPrevFrame, nsGkAtoms::tableRowFrame); int32_t rowIndex = (prevRow) ? prevRow->GetRowIndex() + 1 : startRowIndex; tableFrame->InsertRows(this, rows, rowIndex, true); PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_HAS_DIRTY_CHILDREN); tableFrame->SetGeometryDirty(); } return NS_OK; } NS_IMETHODIMP nsTableRowGroupFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) { NS_ASSERTION(aListID == kPrincipalList, "unexpected child list"); ClearRowCursor(); nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); // XXX why are we doing the QI stuff? There shouldn't be any non-rows here. nsTableRowFrame* rowFrame = do_QueryFrame(aOldFrame); if (rowFrame) { // remove the rows from the table (and flag a rebalance) tableFrame->RemoveRows(*rowFrame, 1, true); PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_HAS_DIRTY_CHILDREN); tableFrame->SetGeometryDirty(); } mFrames.DestroyFrame(aOldFrame); return NS_OK; } /* virtual */ nsMargin nsTableRowGroupFrame::GetUsedMargin() const { return nsMargin(0,0,0,0); } /* virtual */ nsMargin nsTableRowGroupFrame::GetUsedBorder() const { return nsMargin(0,0,0,0); } /* virtual */ nsMargin nsTableRowGroupFrame::GetUsedPadding() const { return nsMargin(0,0,0,0); } nscoord nsTableRowGroupFrame::GetHeightBasis(const nsHTMLReflowState& aReflowState) { nscoord result = 0; nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this); if ((aReflowState.ComputedHeight() > 0) && (aReflowState.ComputedHeight() < NS_UNCONSTRAINEDSIZE)) { nscoord cellSpacing = std::max(0, GetRowCount() - 1) * tableFrame->GetCellSpacingY(); result = aReflowState.ComputedHeight() - cellSpacing; } else { const nsHTMLReflowState* parentRS = aReflowState.parentReflowState; if (parentRS && (tableFrame != parentRS->frame)) { parentRS = parentRS->parentReflowState; } if (parentRS && (tableFrame == parentRS->frame) && (parentRS->ComputedHeight() > 0) && (parentRS->ComputedHeight() < NS_UNCONSTRAINEDSIZE)) { nscoord cellSpacing = std::max(0, tableFrame->GetRowCount() + 1) * tableFrame->GetCellSpacingY(); result = parentRS->ComputedHeight() - cellSpacing; } } return result; } bool nsTableRowGroupFrame::IsSimpleRowFrame(nsTableFrame* aTableFrame, nsIFrame* aFrame) { // Make sure it's a row frame and not a row group frame nsTableRowFrame *rowFrame = do_QueryFrame(aFrame); if (rowFrame) { int32_t rowIndex = rowFrame->GetRowIndex(); // It's a simple row frame if there are no cells that span into or // across the row int32_t numEffCols = aTableFrame->GetEffectiveColCount(); if (!aTableFrame->RowIsSpannedInto(rowIndex, numEffCols) && !aTableFrame->RowHasSpanningCells(rowIndex, numEffCols)) { return true; } } return false; } nsIAtom* nsTableRowGroupFrame::GetType() const { return nsGkAtoms::tableRowGroupFrame; } /** find page break before the first row **/ bool nsTableRowGroupFrame::HasInternalBreakBefore() const { nsIFrame* firstChild = mFrames.FirstChild(); if (!firstChild) return false; return firstChild->StyleDisplay()->mBreakBefore; } /** find page break after the last row **/ bool nsTableRowGroupFrame::HasInternalBreakAfter() const { nsIFrame* lastChild = mFrames.LastChild(); if (!lastChild) return false; return lastChild->StyleDisplay()->mBreakAfter; } /* ----- global methods ----- */ nsIFrame* NS_NewTableRowGroupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) { return new (aPresShell) nsTableRowGroupFrame(aContext); } NS_IMPL_FRAMEARENA_HELPERS(nsTableRowGroupFrame) #ifdef DEBUG_FRAME_DUMP NS_IMETHODIMP nsTableRowGroupFrame::GetFrameName(nsAString& aResult) const { return MakeFrameName(NS_LITERAL_STRING("TableRowGroup"), aResult); } #endif nsMargin* nsTableRowGroupFrame::GetBCBorderWidth(nsMargin& aBorder) { aBorder.left = aBorder.right = aBorder.top = aBorder.bottom = 0; nsTableRowFrame* firstRowFrame = nullptr; nsTableRowFrame* lastRowFrame = nullptr; for (nsTableRowFrame* rowFrame = GetFirstRow(); rowFrame; rowFrame = rowFrame->GetNextRow()) { if (!firstRowFrame) { firstRowFrame = rowFrame; } lastRowFrame = rowFrame; } if (firstRowFrame) { aBorder.top = nsPresContext::CSSPixelsToAppUnits(firstRowFrame->GetTopBCBorderWidth()); aBorder.bottom = nsPresContext::CSSPixelsToAppUnits(lastRowFrame->GetBottomBCBorderWidth()); } return &aBorder; } void nsTableRowGroupFrame::SetContinuousBCBorderWidth(uint8_t aForSide, BCPixelSize aPixelValue) { switch (aForSide) { case NS_SIDE_RIGHT: mRightContBorderWidth = aPixelValue; return; case NS_SIDE_BOTTOM: mBottomContBorderWidth = aPixelValue; return; case NS_SIDE_LEFT: mLeftContBorderWidth = aPixelValue; return; default: NS_ERROR("invalid NS_SIDE argument"); } } //nsILineIterator methods int32_t nsTableRowGroupFrame::GetNumLines() { return GetRowCount(); } bool nsTableRowGroupFrame::GetDirection() { nsTableFrame* table = nsTableFrame::GetTableFrame(this); return (NS_STYLE_DIRECTION_RTL == table->StyleVisibility()->mDirection); } NS_IMETHODIMP nsTableRowGroupFrame::GetLine(int32_t aLineNumber, nsIFrame** aFirstFrameOnLine, int32_t* aNumFramesOnLine, nsRect& aLineBounds, uint32_t* aLineFlags) { NS_ENSURE_ARG_POINTER(aFirstFrameOnLine); NS_ENSURE_ARG_POINTER(aNumFramesOnLine); NS_ENSURE_ARG_POINTER(aLineFlags); nsTableFrame* table = nsTableFrame::GetTableFrame(this); nsTableCellMap* cellMap = table->GetCellMap(); *aLineFlags = 0; *aFirstFrameOnLine = nullptr; *aNumFramesOnLine = 0; aLineBounds.SetRect(0, 0, 0, 0); if ((aLineNumber < 0) || (aLineNumber >= GetRowCount())) { return NS_OK; } aLineNumber += GetStartRowIndex(); *aNumFramesOnLine = cellMap->GetNumCellsOriginatingInRow(aLineNumber); if (*aNumFramesOnLine == 0) { return NS_OK; } int32_t colCount = table->GetColCount(); for (int32_t i = 0; i < colCount; i++) { CellData* data = cellMap->GetDataAt(aLineNumber, i); if (data && data->IsOrig()) { *aFirstFrameOnLine = (nsIFrame*)data->GetCellFrame(); nsIFrame* parent = (*aFirstFrameOnLine)->GetParent(); aLineBounds = parent->GetRect(); return NS_OK; } } NS_ERROR("cellmap is lying"); return NS_ERROR_FAILURE; } int32_t nsTableRowGroupFrame::FindLineContaining(nsIFrame* aFrame, int32_t aStartLine) { NS_ENSURE_TRUE(aFrame, -1); nsTableRowFrame *rowFrame = do_QueryFrame(aFrame); NS_ASSERTION(rowFrame, "RowGroup contains a frame that is not a row"); int32_t rowIndexInGroup = rowFrame->GetRowIndex() - GetStartRowIndex(); return rowIndexInGroup >= aStartLine ? rowIndexInGroup : -1; } #ifdef IBMBIDI NS_IMETHODIMP nsTableRowGroupFrame::CheckLineOrder(int32_t aLine, bool *aIsReordered, nsIFrame **aFirstVisual, nsIFrame **aLastVisual) { *aIsReordered = false; *aFirstVisual = nullptr; *aLastVisual = nullptr; return NS_OK; } #endif // IBMBIDI NS_IMETHODIMP nsTableRowGroupFrame::FindFrameAt(int32_t aLineNumber, nscoord aX, nsIFrame** aFrameFound, bool* aXIsBeforeFirstFrame, bool* aXIsAfterLastFrame) { nsTableFrame* table = nsTableFrame::GetTableFrame(this); nsTableCellMap* cellMap = table->GetCellMap(); *aFrameFound = nullptr; *aXIsBeforeFirstFrame = true; *aXIsAfterLastFrame = false; aLineNumber += GetStartRowIndex(); int32_t numCells = cellMap->GetNumCellsOriginatingInRow(aLineNumber); if (numCells == 0) { return NS_OK; } nsIFrame* frame = nullptr; int32_t colCount = table->GetColCount(); for (int32_t i = 0; i < colCount; i++) { CellData* data = cellMap->GetDataAt(aLineNumber, i); if (data && data->IsOrig()) { frame = (nsIFrame*)data->GetCellFrame(); break; } } NS_ASSERTION(frame, "cellmap is lying"); bool isRTL = (NS_STYLE_DIRECTION_RTL == table->StyleVisibility()->mDirection); nsIFrame* closestFromLeft = nullptr; nsIFrame* closestFromRight = nullptr; int32_t n = numCells; nsIFrame* firstFrame = frame; while (n--) { nsRect rect = frame->GetRect(); if (rect.width > 0) { // If aX is inside this frame - this is it if (rect.x <= aX && rect.XMost() > aX) { closestFromLeft = closestFromRight = frame; break; } if (rect.x < aX) { if (!closestFromLeft || rect.XMost() > closestFromLeft->GetRect().XMost()) closestFromLeft = frame; } else { if (!closestFromRight || rect.x < closestFromRight->GetRect().x) closestFromRight = frame; } } frame = frame->GetNextSibling(); } if (!closestFromLeft && !closestFromRight) { // All frames were zero-width. Just take the first one. closestFromLeft = closestFromRight = firstFrame; } *aXIsBeforeFirstFrame = isRTL ? !closestFromRight : !closestFromLeft; *aXIsAfterLastFrame = isRTL ? !closestFromLeft : !closestFromRight; if (closestFromLeft == closestFromRight) { *aFrameFound = closestFromLeft; } else if (!closestFromLeft) { *aFrameFound = closestFromRight; } else if (!closestFromRight) { *aFrameFound = closestFromLeft; } else { // we're between two frames nscoord delta = closestFromRight->GetRect().x - closestFromLeft->GetRect().XMost(); if (aX < closestFromLeft->GetRect().XMost() + delta/2) *aFrameFound = closestFromLeft; else *aFrameFound = closestFromRight; } return NS_OK; } NS_IMETHODIMP nsTableRowGroupFrame::GetNextSiblingOnLine(nsIFrame*& aFrame, int32_t aLineNumber) { NS_ENSURE_ARG_POINTER(aFrame); aFrame = aFrame->GetNextSibling(); return NS_OK; } //end nsLineIterator methods static void DestroyFrameCursorData(void* aPropertyValue) { delete static_cast(aPropertyValue); } NS_DECLARE_FRAME_PROPERTY(RowCursorProperty, DestroyFrameCursorData) void nsTableRowGroupFrame::ClearRowCursor() { if (!(GetStateBits() & NS_ROWGROUP_HAS_ROW_CURSOR)) return; RemoveStateBits(NS_ROWGROUP_HAS_ROW_CURSOR); Properties().Delete(RowCursorProperty()); } nsTableRowGroupFrame::FrameCursorData* nsTableRowGroupFrame::SetupRowCursor() { if (GetStateBits() & NS_ROWGROUP_HAS_ROW_CURSOR) { // We already have a valid row cursor. Don't waste time rebuilding it. return nullptr; } nsIFrame* f = mFrames.FirstChild(); int32_t count; for (count = 0; f && count < MIN_ROWS_NEEDING_CURSOR; ++count) { f = f->GetNextSibling(); } if (!f) { // Less than MIN_ROWS_NEEDING_CURSOR rows, so just don't bother return nullptr; } FrameCursorData* data = new FrameCursorData(); if (!data) return nullptr; Properties().Set(RowCursorProperty(), data); AddStateBits(NS_ROWGROUP_HAS_ROW_CURSOR); return data; } nsIFrame* nsTableRowGroupFrame::GetFirstRowContaining(nscoord aY, nscoord* aOverflowAbove) { if (!(GetStateBits() & NS_ROWGROUP_HAS_ROW_CURSOR)) return nullptr; FrameCursorData* property = static_cast (Properties().Get(RowCursorProperty())); uint32_t cursorIndex = property->mCursorIndex; uint32_t frameCount = property->mFrames.Length(); if (cursorIndex >= frameCount) return nullptr; nsIFrame* cursorFrame = property->mFrames[cursorIndex]; // The cursor's frame list excludes frames with empty overflow-area, so // we don't need to check that here. // We use property->mOverflowBelow here instead of computing the frame's // true overflowArea.YMost(), because it is essential for the thresholds // to form a monotonically increasing sequence. Otherwise we would break // encountering a row whose overflowArea.YMost() is <= aY but which has // a row above it containing cell(s) that span to include aY. while (cursorIndex > 0 && cursorFrame->GetRect().YMost() + property->mOverflowBelow > aY) { --cursorIndex; cursorFrame = property->mFrames[cursorIndex]; } while (cursorIndex + 1 < frameCount && cursorFrame->GetRect().YMost() + property->mOverflowBelow <= aY) { ++cursorIndex; cursorFrame = property->mFrames[cursorIndex]; } property->mCursorIndex = cursorIndex; *aOverflowAbove = property->mOverflowAbove; return cursorFrame; } bool nsTableRowGroupFrame::FrameCursorData::AppendFrame(nsIFrame* aFrame) { nsRect overflowRect = aFrame->GetVisualOverflowRect(); if (overflowRect.IsEmpty()) return true; nscoord overflowAbove = -overflowRect.y; nscoord overflowBelow = overflowRect.YMost() - aFrame->GetSize().height; mOverflowAbove = std::max(mOverflowAbove, overflowAbove); mOverflowBelow = std::max(mOverflowBelow, overflowBelow); return mFrames.AppendElement(aFrame) != nullptr; } void nsTableRowGroupFrame::InvalidateFrame(uint32_t aDisplayItemKey) { nsIFrame::InvalidateFrame(aDisplayItemKey); GetParent()->InvalidateFrameWithRect(GetVisualOverflowRect() + GetPosition(), aDisplayItemKey); } void nsTableRowGroupFrame::InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey) { nsIFrame::InvalidateFrameWithRect(aRect, aDisplayItemKey); // If we have filters applied that would affects our bounds, then // we get an inactive layer created and this is computed // within FrameLayerBuilder GetParent()->InvalidateFrameWithRect(aRect + GetPosition(), aDisplayItemKey); }