mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/layout/tables/nsTableCellFrame.cpp

1211 строки
39 KiB
C++
Исходник Ответственный История

/* -*- 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 "nsTableFrame.h"
#include "nsTableColFrame.h"
#include "nsTableCellFrame.h"
#include "nsTableRowFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsTablePainter.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsRenderingContext.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsHTMLParts.h"
#include "nsGkAtoms.h"
#include "nsIPresShell.h"
#include "nsCOMPtr.h"
#include "nsIServiceManager.h"
#include "nsIDOMNode.h"
#include "nsNameSpaceManager.h"
#include "nsDisplayList.h"
#include "nsLayoutUtils.h"
#include "nsTextFrame.h"
#include "FrameLayerBuilder.h"
#include <algorithm>
//TABLECELL SELECTION
#include "nsFrameSelection.h"
#include "mozilla/LookAndFeel.h"
using namespace mozilla;
nsTableCellFrame::nsTableCellFrame(nsStyleContext* aContext) :
nsContainerFrame(aContext)
{
mColIndex = 0;
mPriorAvailWidth = 0;
SetContentEmpty(false);
SetHasPctOverHeight(false);
}
nsTableCellFrame::~nsTableCellFrame()
{
}
NS_IMPL_FRAMEARENA_HELPERS(nsTableCellFrame)
nsTableCellFrame*
nsTableCellFrame::GetNextCell() const
{
nsIFrame* childFrame = GetNextSibling();
while (childFrame) {
nsTableCellFrame *cellFrame = do_QueryFrame(childFrame);
if (cellFrame) {
return cellFrame;
}
childFrame = childFrame->GetNextSibling();
}
return nullptr;
}
void
nsTableCellFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
// Let the base class do its initialization
nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
if (GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER) {
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
}
if (aPrevInFlow) {
// Set the column index
nsTableCellFrame* cellFrame = (nsTableCellFrame*)aPrevInFlow;
int32_t colIndex;
cellFrame->GetColIndex(colIndex);
SetColIndex(colIndex);
}
}
void
nsTableCellFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
if (GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN) {
nsTableFrame::UnregisterPositionedTablePart(this, aDestructRoot);
}
nsContainerFrame::DestroyFrom(aDestructRoot);
}
// nsIPercentHeightObserver methods
void
nsTableCellFrame::NotifyPercentHeight(const nsHTMLReflowState& aReflowState)
{
// nsHTMLReflowState ensures the mCBReflowState of blocks inside a
// cell is the cell frame, not the inner-cell block, and that the
// containing block of an inner table is the containing block of its
// outer table.
// XXXldb Given the now-stricter |NeedsToObserve|, many if not all of
// these tests are probably unnecessary.
// Maybe the cell reflow state; we sure if we're inside the |if|.
const nsHTMLReflowState *cellRS = aReflowState.mCBReflowState;
if (cellRS && cellRS->frame == this &&
(cellRS->ComputedHeight() == NS_UNCONSTRAINEDSIZE ||
cellRS->ComputedHeight() == 0)) { // XXXldb Why 0?
// This is a percentage height on a frame whose percentage heights
// are based on the height of the cell, since its containing block
// is the inner cell frame.
// We'll only honor the percent height if sibling-cells/ancestors
// have specified/pct height. (Also, siblings only count for this if
// both this cell and the sibling cell span exactly 1 row.)
if (nsTableFrame::AncestorsHaveStyleHeight(*cellRS) ||
(nsTableFrame::GetTableFrame(this)->GetEffectiveRowSpan(*this) == 1 &&
(cellRS->parentReflowState->frame->GetStateBits() &
NS_ROW_HAS_CELL_WITH_STYLE_HEIGHT))) {
for (const nsHTMLReflowState *rs = aReflowState.parentReflowState;
rs != cellRS;
rs = rs->parentReflowState) {
rs->frame->AddStateBits(NS_FRAME_CONTAINS_RELATIVE_HEIGHT);
}
nsTableFrame::RequestSpecialHeightReflow(*cellRS);
}
}
}
// The cell needs to observe its block and things inside its block but nothing below that
bool
nsTableCellFrame::NeedsToObserve(const nsHTMLReflowState& aReflowState)
{
const nsHTMLReflowState *rs = aReflowState.parentReflowState;
if (!rs)
return false;
if (rs->frame == this) {
// We always observe the child block. It will never send any
// notifications, but we need this so that the observer gets
// propagated to its kids.
return true;
}
rs = rs->parentReflowState;
if (!rs) {
return false;
}
// We always need to let the percent height observer be propagated
// from an outer table frame to an inner table frame.
nsIAtom *fType = aReflowState.frame->GetType();
if (fType == nsGkAtoms::tableFrame) {
return true;
}
// We need the observer to be propagated to all children of the cell
// (i.e., children of the child block) in quirks mode, but only to
// tables in standards mode.
return rs->frame == this &&
(PresContext()->CompatibilityMode() == eCompatibility_NavQuirks ||
fType == nsGkAtoms::tableOuterFrame);
}
nsresult
nsTableCellFrame::GetRowIndex(int32_t &aRowIndex) const
{
nsresult result;
nsTableRowFrame* row = static_cast<nsTableRowFrame*>(GetParent());
if (row) {
aRowIndex = row->GetRowIndex();
result = NS_OK;
}
else {
aRowIndex = 0;
result = NS_ERROR_NOT_INITIALIZED;
}
return result;
}
nsresult
nsTableCellFrame::GetColIndex(int32_t &aColIndex) const
{
if (GetPrevInFlow()) {
return static_cast<nsTableCellFrame*>(FirstInFlow())->GetColIndex(aColIndex);
}
else {
aColIndex = mColIndex;
return NS_OK;
}
}
nsresult
nsTableCellFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
// We need to recalculate in this case because of the nowrap quirk in
// BasicTableLayoutStrategy
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::nowrap &&
PresContext()->CompatibilityMode() == eCompatibility_NavQuirks) {
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
}
// let the table frame decide what to do
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
tableFrame->AttributeChangedFor(this, mContent, aAttribute);
return NS_OK;
}
/* virtual */ void
nsTableCellFrame::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())) {
int32_t colIndex, rowIndex;
GetColIndex(colIndex);
GetRowIndex(rowIndex);
// row span needs to be clamped as we do not create rows in the cellmap
// which do not have cells originating in them
nsIntRect damageArea(colIndex, rowIndex, GetColSpan(),
std::min(GetRowSpan(), tableFrame->GetRowCount() - rowIndex));
tableFrame->AddBCDamageArea(damageArea);
}
}
#ifdef DEBUG
void
nsTableCellFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList)
{
MOZ_CRASH("unsupported operation");
}
void
nsTableCellFrame::InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
MOZ_CRASH("unsupported operation");
}
void
nsTableCellFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame)
{
MOZ_CRASH("unsupported operation");
}
#endif
void nsTableCellFrame::SetColIndex(int32_t aColIndex)
{
mColIndex = aColIndex;
}
/* virtual */ nsMargin
nsTableCellFrame::GetUsedMargin() const
{
return nsMargin(0,0,0,0);
}
//ASSURE DIFFERENT COLORS for selection
inline nscolor EnsureDifferentColors(nscolor colorA, nscolor colorB)
{
if (colorA == colorB)
{
nscolor res;
res = NS_RGB(NS_GET_R(colorA) ^ 0xff,
NS_GET_G(colorA) ^ 0xff,
NS_GET_B(colorA) ^ 0xff);
return res;
}
return colorA;
}
void
nsTableCellFrame::DecorateForSelection(nsRenderingContext& aRenderingContext,
nsPoint aPt)
{
NS_ASSERTION(IsSelected(), "Should only be called for selected cells");
int16_t displaySelection;
nsPresContext* presContext = PresContext();
displaySelection = DisplaySelection(presContext);
if (displaySelection) {
nsRefPtr<nsFrameSelection> frameSelection =
presContext->PresShell()->FrameSelection();
if (frameSelection->GetTableCellSelection()) {
nscolor bordercolor;
if (displaySelection == nsISelectionController::SELECTION_DISABLED) {
bordercolor = NS_RGB(176,176,176);// disabled color
}
else {
bordercolor =
LookAndFeel::GetColor(LookAndFeel::eColorID_TextSelectBackground);
}
nscoord threePx = nsPresContext::CSSPixelsToAppUnits(3);
if ((mRect.width > threePx) && (mRect.height > threePx))
{
//compare bordercolor to ((nsStyleColor *)myColor)->mBackgroundColor)
bordercolor = EnsureDifferentColors(bordercolor,
StyleBackground()->mBackgroundColor);
nsRenderingContext::AutoPushTranslation
translate(&aRenderingContext, aPt);
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
aRenderingContext.SetColor(bordercolor);
aRenderingContext.DrawLine(onePixel, 0, mRect.width, 0);
aRenderingContext.DrawLine(0, onePixel, 0, mRect.height);
aRenderingContext.DrawLine(onePixel, mRect.height, mRect.width, mRect.height);
aRenderingContext.DrawLine(mRect.width, onePixel, mRect.width, mRect.height);
//middle
aRenderingContext.DrawRect(onePixel, onePixel, mRect.width-onePixel,
mRect.height-onePixel);
//shading
aRenderingContext.DrawLine(2*onePixel, mRect.height-2*onePixel,
mRect.width-onePixel, mRect.height- (2*onePixel));
aRenderingContext.DrawLine(mRect.width - (2*onePixel), 2*onePixel,
mRect.width - (2*onePixel), mRect.height-onePixel);
}
}
}
}
void
nsTableCellFrame::PaintBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags)
{
nsRect rect(aPt, GetSize());
nsCSSRendering::PaintBackground(PresContext(), aRenderingContext, this,
aDirtyRect, rect, aFlags);
}
// Called by nsTablePainter
void
nsTableCellFrame::PaintCellBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect, nsPoint aPt,
uint32_t aFlags)
{
if (!StyleVisibility()->IsVisible())
return;
PaintBackground(aRenderingContext, aDirtyRect, aPt, aFlags);
}
nsresult
nsTableCellFrame::ProcessBorders(nsTableFrame* aFrame,
nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
const nsStyleBorder* borderStyle = StyleBorder();
if (aFrame->IsBorderCollapse() || !borderStyle->HasBorder())
return NS_OK;
if (!GetContentEmpty() ||
StyleTableBorder()->mEmptyCells == NS_STYLE_TABLE_EMPTY_CELLS_SHOW) {
aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayBorder(aBuilder, this));
}
return NS_OK;
}
class nsDisplayTableCellBackground : public nsDisplayTableItem {
public:
nsDisplayTableCellBackground(nsDisplayListBuilder* aBuilder,
nsTableCellFrame* aFrame) :
nsDisplayTableItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayTableCellBackground);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayTableCellBackground() {
MOZ_COUNT_DTOR(nsDisplayTableCellBackground);
}
#endif
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState,
nsTArray<nsIFrame*> *aOutFrames) MOZ_OVERRIDE {
aOutFrames->AppendElement(mFrame);
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) MOZ_OVERRIDE;
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) MOZ_OVERRIDE;
virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) MOZ_OVERRIDE;
NS_DISPLAY_DECL_NAME("TableCellBackground", TYPE_TABLE_CELL_BACKGROUND)
};
void nsDisplayTableCellBackground::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
static_cast<nsTableCellFrame*>(mFrame)->
PaintBackground(*aCtx, mVisibleRect, ToReferenceFrame(),
aBuilder->GetBackgroundPaintFlags());
}
nsRect
nsDisplayTableCellBackground::GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap)
{
// revert from nsDisplayTableItem's implementation ... cell backgrounds
// don't overflow the cell
return nsDisplayItem::GetBounds(aBuilder, aSnap);
}
void
nsDisplayTableCellBackground::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion)
{
if (aBuilder->ShouldSyncDecodeImages()) {
if (!nsCSSRendering::AreAllBackgroundImagesDecodedForFrame(mFrame)) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
}
nsDisplayTableItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
void nsTableCellFrame::InvalidateFrame(uint32_t aDisplayItemKey)
{
nsIFrame::InvalidateFrame(aDisplayItemKey);
GetParent()->InvalidateFrameWithRect(GetVisualOverflowRect() + GetPosition(), aDisplayItemKey);
}
void nsTableCellFrame::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);
}
static void
PaintTableCellSelection(nsIFrame* aFrame, nsRenderingContext* aCtx,
const nsRect& aRect, nsPoint aPt)
{
static_cast<nsTableCellFrame*>(aFrame)->DecorateForSelection(*aCtx, aPt);
}
void
nsTableCellFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
DO_GLOBAL_REFLOW_COUNT_DSP("nsTableCellFrame");
if (IsVisibleInSelection(aBuilder)) {
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
int32_t emptyCellStyle = GetContentEmpty() && !tableFrame->IsBorderCollapse() ?
StyleTableBorder()->mEmptyCells
: NS_STYLE_TABLE_EMPTY_CELLS_SHOW;
// take account of 'empty-cells'
if (StyleVisibility()->IsVisible() &&
(NS_STYLE_TABLE_EMPTY_CELLS_HIDE != emptyCellStyle)) {
bool isRoot = aBuilder->IsAtRootOfPseudoStackingContext();
if (!isRoot) {
nsDisplayTableItem* currentItem = aBuilder->GetCurrentTableItem();
if (currentItem) {
currentItem->UpdateForFrameBackground(this);
}
}
// display outset box-shadows if we need to.
const nsStyleBorder* borderStyle = StyleBorder();
bool hasBoxShadow = !!borderStyle->mBoxShadow;
if (hasBoxShadow) {
aLists.BorderBackground()->AppendNewToTop(
new (aBuilder) nsDisplayBoxShadowOuter(aBuilder, this));
}
// display background if we need to.
if (aBuilder->IsForEventDelivery() ||
(((!tableFrame->IsBorderCollapse() || isRoot) &&
(!StyleBackground()->IsTransparent() || StyleDisplay()->mAppearance)))) {
// The cell background was not painted by the nsTablePainter,
// so we need to do it. We have special background processing here
// so we need to duplicate some code from nsFrame::DisplayBorderBackgroundOutline
nsDisplayTableItem* item =
new (aBuilder) nsDisplayTableCellBackground(aBuilder, this);
aLists.BorderBackground()->AppendNewToTop(item);
item->UpdateForFrameBackground(this);
}
// display inset box-shadows if we need to.
if (hasBoxShadow) {
aLists.BorderBackground()->AppendNewToTop(
new (aBuilder) nsDisplayBoxShadowInner(aBuilder, this));
}
// display borders if we need to
ProcessBorders(tableFrame, aBuilder, aLists);
// and display the selection border if we need to
if (IsSelected()) {
aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayGeneric(aBuilder, this, ::PaintTableCellSelection,
"TableCellSelection",
nsDisplayItem::TYPE_TABLE_CELL_SELECTION));
}
}
// the 'empty-cells' property has no effect on 'outline'
DisplayOutline(aBuilder, aLists);
}
// Push a null 'current table item' so that descendant tables can't
// accidentally mess with our table
nsAutoPushCurrentTableItem pushTableItem;
pushTableItem.Push(aBuilder, nullptr);
nsIFrame* kid = mFrames.FirstChild();
NS_ASSERTION(kid && !kid->GetNextSibling(), "Table cells should have just one child");
// The child's background will go in our BorderBackground() list.
// This isn't a problem since it won't have a real background except for
// event handling. We do not call BuildDisplayListForNonBlockChildren
// because that/ would put the child's background in the Content() list
// which isn't right (e.g., would end up on top of our child floats for
// event handling).
BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
}
int
nsTableCellFrame::GetLogicalSkipSides(const nsHTMLReflowState* aReflowState) const
{
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
NS_STYLE_BOX_DECORATION_BREAK_CLONE)) {
return 0;
}
int skip = 0;
if (nullptr != GetPrevInFlow()) {
skip |= LOGICAL_SIDE_B_START;
}
if (nullptr != GetNextInFlow()) {
skip |= LOGICAL_SIDE_B_END;
}
return skip;
}
/* virtual */ nsMargin
nsTableCellFrame::GetBorderOverflow()
{
return nsMargin(0, 0, 0, 0);
}
// Align the cell's child frame within the cell
void nsTableCellFrame::VerticallyAlignChild(nscoord aMaxAscent)
{
/* It's the 'border-collapse' on the table that matters */
nsMargin borderPadding = GetUsedBorderAndPadding();
nscoord topInset = borderPadding.top;
nscoord bottomInset = borderPadding.bottom;
uint8_t verticalAlignFlags = GetVerticalAlign();
nscoord height = mRect.height;
nsIFrame* firstKid = mFrames.FirstChild();
NS_ASSERTION(firstKid, "Frame construction error, a table cell always has an inner cell frame");
nsRect kidRect = firstKid->GetRect();
nscoord childHeight = kidRect.height;
// Vertically align the child
nscoord kidYTop = 0;
switch (verticalAlignFlags)
{
case NS_STYLE_VERTICAL_ALIGN_BASELINE:
// Align the baselines of the child frame with the baselines of
// other children in the same row which have 'vertical-align: baseline'
kidYTop = topInset + aMaxAscent - GetCellBaseline();
break;
case NS_STYLE_VERTICAL_ALIGN_TOP:
// Align the top of the child frame with the top of the content area,
kidYTop = topInset;
break;
case NS_STYLE_VERTICAL_ALIGN_BOTTOM:
// Align the bottom of the child frame with the bottom of the content area,
kidYTop = height - childHeight - bottomInset;
break;
default:
case NS_STYLE_VERTICAL_ALIGN_MIDDLE:
// Align the middle of the child frame with the middle of the content area,
kidYTop = (height - childHeight - bottomInset + topInset) / 2;
}
// if the content is larger than the cell height align from top
kidYTop = std::max(0, kidYTop);
if (kidYTop != kidRect.y) {
// Invalidate at the old position first
firstKid->InvalidateFrameSubtree();
}
firstKid->SetPosition(nsPoint(kidRect.x, kidYTop));
nsHTMLReflowMetrics desiredSize(GetWritingMode()); // ???
desiredSize.Width() = mRect.width;
desiredSize.Height() = mRect.height;
nsRect overflow(nsPoint(0,0), GetSize());
overflow.Inflate(GetBorderOverflow());
desiredSize.mOverflowAreas.SetAllTo(overflow);
ConsiderChildOverflow(desiredSize.mOverflowAreas, firstKid);
FinishAndStoreOverflow(&desiredSize);
if (kidYTop != kidRect.y) {
// Make sure any child views are correctly positioned. We know the inner table
// cell won't have a view
nsContainerFrame::PositionChildViews(firstKid);
// Invalidate new overflow rect
firstKid->InvalidateFrameSubtree();
}
if (HasView()) {
nsContainerFrame::SyncFrameViewAfterReflow(PresContext(), this,
GetView(),
desiredSize.VisualOverflow(), 0);
}
}
bool
nsTableCellFrame::UpdateOverflow()
{
nsRect bounds(nsPoint(0,0), GetSize());
bounds.Inflate(GetBorderOverflow());
nsOverflowAreas overflowAreas(bounds, bounds);
nsLayoutUtils::UnionChildOverflow(this, overflowAreas);
return FinishAndStoreOverflow(overflowAreas, GetSize());
}
// Per CSS 2.1, we map 'sub', 'super', 'text-top', 'text-bottom',
// length, percentage, and calc() values to 'baseline'.
uint8_t
nsTableCellFrame::GetVerticalAlign() const
{
const nsStyleCoord& verticalAlign = StyleTextReset()->mVerticalAlign;
if (verticalAlign.GetUnit() == eStyleUnit_Enumerated) {
uint8_t value = verticalAlign.GetIntValue();
if (value == NS_STYLE_VERTICAL_ALIGN_TOP ||
value == NS_STYLE_VERTICAL_ALIGN_MIDDLE ||
value == NS_STYLE_VERTICAL_ALIGN_BOTTOM) {
return value;
}
}
return NS_STYLE_VERTICAL_ALIGN_BASELINE;
}
bool
nsTableCellFrame::CellHasVisibleContent(nscoord height,
nsTableFrame* tableFrame,
nsIFrame* kidFrame)
{
// see http://www.w3.org/TR/CSS21/tables.html#empty-cells
if (height > 0)
return true;
if (tableFrame->IsBorderCollapse())
return true;
nsIFrame* innerFrame = kidFrame->GetFirstPrincipalChild();
while(innerFrame) {
nsIAtom* frameType = innerFrame->GetType();
if (nsGkAtoms::textFrame == frameType) {
nsTextFrame* textFrame = static_cast<nsTextFrame*>(innerFrame);
if (textFrame->HasNoncollapsedCharacters())
return true;
}
else if (nsGkAtoms::placeholderFrame != frameType) {
return true;
}
else {
nsIFrame *floatFrame = nsLayoutUtils::GetFloatFromPlaceholder(innerFrame);
if (floatFrame)
return true;
}
innerFrame = innerFrame->GetNextSibling();
}
return false;
}
nscoord
nsTableCellFrame::GetCellBaseline() const
{
// Ignore the position of the inner frame relative to the cell frame
// since we want the position as though the inner were top-aligned.
nsIFrame *inner = mFrames.FirstChild();
nscoord borderPadding = GetUsedBorderAndPadding().top;
nscoord result;
if (nsLayoutUtils::GetFirstLineBaseline(inner, &result))
return result + borderPadding;
return inner->GetContentRect().YMost() - inner->GetPosition().y +
borderPadding;
}
int32_t nsTableCellFrame::GetRowSpan()
{
int32_t rowSpan=1;
nsGenericHTMLElement *hc = nsGenericHTMLElement::FromContent(mContent);
// Don't look at the content's rowspan if we're a pseudo cell
if (hc && !StyleContext()->GetPseudo()) {
const nsAttrValue* attr = hc->GetParsedAttr(nsGkAtoms::rowspan);
// Note that we don't need to check the tag name, because only table cells
// and table headers parse the "rowspan" attribute into an integer.
if (attr && attr->Type() == nsAttrValue::eInteger) {
rowSpan = attr->GetIntegerValue();
}
}
return rowSpan;
}
int32_t nsTableCellFrame::GetColSpan()
{
int32_t colSpan=1;
nsGenericHTMLElement *hc = nsGenericHTMLElement::FromContent(mContent);
// Don't look at the content's colspan if we're a pseudo cell
if (hc && !StyleContext()->GetPseudo()) {
const nsAttrValue* attr = hc->GetParsedAttr(nsGkAtoms::colspan);
// Note that we don't need to check the tag name, because only table cells
// and table headers parse the "colspan" attribute into an integer.
if (attr && attr->Type() == nsAttrValue::eInteger) {
colSpan = attr->GetIntegerValue();
}
}
return colSpan;
}
/* virtual */ nscoord
nsTableCellFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nscoord result = 0;
DISPLAY_MIN_WIDTH(this, result);
nsIFrame *inner = mFrames.FirstChild();
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, inner,
nsLayoutUtils::MIN_WIDTH);
return result;
}
/* virtual */ nscoord
nsTableCellFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
nscoord result = 0;
DISPLAY_PREF_WIDTH(this, result);
nsIFrame *inner = mFrames.FirstChild();
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, inner,
nsLayoutUtils::PREF_WIDTH);
return result;
}
/* virtual */ nsIFrame::IntrinsicWidthOffsetData
nsTableCellFrame::IntrinsicWidthOffsets(nsRenderingContext* aRenderingContext)
{
IntrinsicWidthOffsetData result =
nsContainerFrame::IntrinsicWidthOffsets(aRenderingContext);
result.hMargin = 0;
result.hPctMargin = 0;
nsMargin border;
GetBorderWidth(border);
result.hBorder = border.LeftRight();
return result;
}
#ifdef DEBUG
#define PROBABLY_TOO_LARGE 1000000
static
void DebugCheckChildSize(nsIFrame* aChild,
nsHTMLReflowMetrics& aMet,
nsSize& aAvailSize)
{
if ((aMet.Width() < 0) || (aMet.Width() > PROBABLY_TOO_LARGE)) {
printf("WARNING: cell content %p has large width %d \n",
static_cast<void*>(aChild), int32_t(aMet.Width()));
}
}
#endif
// the computed height for the cell, which descendants use for percent height calculations
// it is the height (minus border, padding) of the cell's first in flow during its final
// reflow without an unconstrained height.
static nscoord
CalcUnpaginagedHeight(nsPresContext* aPresContext,
nsTableCellFrame& aCellFrame,
nsTableFrame& aTableFrame,
nscoord aVerticalBorderPadding)
{
const nsTableCellFrame* firstCellInFlow =
static_cast<nsTableCellFrame*>(aCellFrame.FirstInFlow());
nsTableFrame* firstTableInFlow =
static_cast<nsTableFrame*>(aTableFrame.FirstInFlow());
nsTableRowFrame* row =
static_cast<nsTableRowFrame*>(firstCellInFlow->GetParent());
nsTableRowGroupFrame* firstRGInFlow =
static_cast<nsTableRowGroupFrame*>(row->GetParent());
int32_t rowIndex;
firstCellInFlow->GetRowIndex(rowIndex);
int32_t rowSpan = aTableFrame.GetEffectiveRowSpan(*firstCellInFlow);
nscoord cellSpacing = firstTableInFlow->GetCellSpacingX();
nscoord computedHeight = ((rowSpan - 1) * cellSpacing) - aVerticalBorderPadding;
int32_t rowX;
for (row = firstRGInFlow->GetFirstRow(), rowX = 0; row; row = row->GetNextRow(), rowX++) {
if (rowX > rowIndex + rowSpan - 1) {
break;
}
else if (rowX >= rowIndex) {
computedHeight += row->GetUnpaginatedHeight(aPresContext);
}
}
return computedHeight;
}
void
nsTableCellFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTableCellFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
if (aReflowState.mFlags.mSpecialHeightReflow) {
FirstInFlow()->AddStateBits(NS_TABLE_CELL_HAD_SPECIAL_REFLOW);
}
// see if a special height reflow needs to occur due to having a pct height
nsTableFrame::CheckRequestSpecialHeightReflow(aReflowState);
aStatus = NS_FRAME_COMPLETE;
nsSize availSize(aReflowState.AvailableWidth(), aReflowState.AvailableHeight());
nsMargin borderPadding = aReflowState.ComputedPhysicalPadding();
nsMargin border;
GetBorderWidth(border);
borderPadding += border;
nscoord topInset = borderPadding.top;
nscoord rightInset = borderPadding.right;
nscoord bottomInset = borderPadding.bottom;
nscoord leftInset = borderPadding.left;
// reduce available space by insets, if we're in a constrained situation
availSize.width -= leftInset + rightInset;
if (NS_UNCONSTRAINEDSIZE != availSize.height)
availSize.height -= topInset + bottomInset;
// Try to reflow the child into the available space. It might not
// fit or might need continuing.
if (availSize.height < 0)
availSize.height = 1;
nsHTMLReflowMetrics kidSize(aReflowState.GetWritingMode(), aDesiredSize.mFlags);
kidSize.Width() = kidSize.Height() = 0;
SetPriorAvailWidth(aReflowState.AvailableWidth());
nsIFrame* firstKid = mFrames.FirstChild();
NS_ASSERTION(firstKid, "Frame construction error, a table cell always has an inner cell frame");
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (aReflowState.mFlags.mSpecialHeightReflow) {
const_cast<nsHTMLReflowState&>(aReflowState).SetComputedHeight(mRect.height - topInset - bottomInset);
DISPLAY_REFLOW_CHANGE();
}
else if (aPresContext->IsPaginated()) {
nscoord computedUnpaginatedHeight =
CalcUnpaginagedHeight(aPresContext, (nsTableCellFrame&)*this,
*tableFrame, topInset + bottomInset);
if (computedUnpaginatedHeight > 0) {
const_cast<nsHTMLReflowState&>(aReflowState).SetComputedHeight(computedUnpaginatedHeight);
DISPLAY_REFLOW_CHANGE();
}
}
else {
SetHasPctOverHeight(false);
}
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, firstKid,
availSize);
// Don't be a percent height observer if we're in the middle of
// special-height reflow, in case we get an accidental NotifyPercentHeight()
// call (which we shouldn't honor during special-height reflow)
if (!aReflowState.mFlags.mSpecialHeightReflow) {
// mPercentHeightObserver is for children of cells in quirks mode,
// but only those than are tables in standards mode. NeedsToObserve
// will determine how far this is propagated to descendants.
kidReflowState.mPercentHeightObserver = this;
}
// Don't propagate special height reflow state to our kids
kidReflowState.mFlags.mSpecialHeightReflow = false;
if (aReflowState.mFlags.mSpecialHeightReflow ||
(FirstInFlow()->GetStateBits() & NS_TABLE_CELL_HAD_SPECIAL_REFLOW)) {
// We need to force the kid to have mVResize set if we've had a
// special reflow in the past, since the non-special reflow needs to
// resize back to what it was without the special height reflow.
kidReflowState.mFlags.mVResize = true;
}
nsPoint kidOrigin(leftInset, topInset);
nsRect origRect = firstKid->GetRect();
nsRect origVisualOverflow = firstKid->GetVisualOverflowRect();
bool firstReflow = (firstKid->GetStateBits() & NS_FRAME_FIRST_REFLOW) != 0;
ReflowChild(firstKid, aPresContext, kidSize, kidReflowState,
kidOrigin.x, kidOrigin.y, 0, aStatus);
if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aStatus)) {
// Don't pass OVERFLOW_INCOMPLETE through tables until they can actually handle it
//XXX should paginate overflow as overflow, but not in this patch (bug 379349)
NS_FRAME_SET_INCOMPLETE(aStatus);
printf("Set table cell incomplete %p\n", static_cast<void*>(this));
}
// XXXbz is this invalidate actually needed, really?
if (GetStateBits() & NS_FRAME_IS_DIRTY) {
InvalidateFrameSubtree();
}
#ifdef DEBUG
DebugCheckChildSize(firstKid, kidSize, availSize);
#endif
// 0 dimensioned cells need to be treated specially in Standard/NavQuirks mode
// see testcase "emptyCells.html"
nsIFrame* prevInFlow = GetPrevInFlow();
bool isEmpty;
if (prevInFlow) {
isEmpty = static_cast<nsTableCellFrame*>(prevInFlow)->GetContentEmpty();
} else {
isEmpty = !CellHasVisibleContent(kidSize.Height(), tableFrame, firstKid);
}
SetContentEmpty(isEmpty);
// Place the child
FinishReflowChild(firstKid, aPresContext, kidSize, &kidReflowState,
kidOrigin.x, kidOrigin.y, 0);
nsTableFrame::InvalidateTableFrame(firstKid, origRect, origVisualOverflow,
firstReflow);
// first, compute the height which can be set w/o being restricted by aMaxSize.height
nscoord cellHeight = kidSize.Height();
if (NS_UNCONSTRAINEDSIZE != cellHeight) {
cellHeight += topInset + bottomInset;
}
// next determine the cell's width
nscoord cellWidth = kidSize.Width(); // at this point, we've factored in the cell's style attributes
// factor in border and padding
if (NS_UNCONSTRAINEDSIZE != cellWidth) {
cellWidth += leftInset + rightInset;
}
// set the cell's desired size and max element size
aDesiredSize.Width() = cellWidth;
aDesiredSize.Height() = cellHeight;
// the overflow area will be computed when the child will be vertically aligned
if (aReflowState.mFlags.mSpecialHeightReflow) {
if (aDesiredSize.Height() > mRect.height) {
// set a bit indicating that the pct height contents exceeded
// the height that they could honor in the pass 2 reflow
SetHasPctOverHeight(true);
}
if (NS_UNCONSTRAINEDSIZE == aReflowState.AvailableHeight()) {
aDesiredSize.Height() = mRect.height;
}
}
// 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();
}
// remember the desired size for this reflow
SetDesiredSize(aDesiredSize);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
/* ----- global methods ----- */
NS_QUERYFRAME_HEAD(nsTableCellFrame)
NS_QUERYFRAME_ENTRY(nsTableCellFrame)
NS_QUERYFRAME_ENTRY(nsITableCellLayout)
NS_QUERYFRAME_ENTRY(nsIPercentHeightObserver)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
#ifdef ACCESSIBILITY
a11y::AccType
nsTableCellFrame::AccessibleType()
{
return a11y::eHTMLTableCellType;
}
#endif
/* This is primarily for editor access via nsITableLayout */
NS_IMETHODIMP
nsTableCellFrame::GetCellIndexes(int32_t &aRowIndex, int32_t &aColIndex)
{
nsresult res = GetRowIndex(aRowIndex);
if (NS_FAILED(res))
{
aColIndex = 0;
return res;
}
aColIndex = mColIndex;
return NS_OK;
}
nsTableCellFrame*
NS_NewTableCellFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext,
bool aIsBorderCollapse)
{
if (aIsBorderCollapse)
return new (aPresShell) nsBCTableCellFrame(aContext);
else
return new (aPresShell) nsTableCellFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsBCTableCellFrame)
nsMargin*
nsTableCellFrame::GetBorderWidth(nsMargin& aBorder) const
{
aBorder = StyleBorder()->GetComputedBorder();
return &aBorder;
}
nsIAtom*
nsTableCellFrame::GetType() const
{
return nsGkAtoms::tableCellFrame;
}
#ifdef DEBUG_FRAME_DUMP
nsresult
nsTableCellFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("TableCell"), aResult);
}
#endif
// nsBCTableCellFrame
nsBCTableCellFrame::nsBCTableCellFrame(nsStyleContext* aContext)
:nsTableCellFrame(aContext)
{
mTopBorder = mRightBorder = mBottomBorder = mLeftBorder = 0;
}
nsBCTableCellFrame::~nsBCTableCellFrame()
{
}
nsIAtom*
nsBCTableCellFrame::GetType() const
{
return nsGkAtoms::bcTableCellFrame;
}
/* virtual */ nsMargin
nsBCTableCellFrame::GetUsedBorder() const
{
nsMargin result;
GetBorderWidth(result);
return result;
}
/* virtual */ bool
nsBCTableCellFrame::GetBorderRadii(const nsSize& aFrameSize,
const nsSize& aBorderArea,
int aSkipSides,
nscoord aRadii[8]) const
{
NS_FOR_CSS_HALF_CORNERS(corner) {
aRadii[corner] = 0;
}
return false;
}
#ifdef DEBUG_FRAME_DUMP
nsresult
nsBCTableCellFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("BCTableCell"), aResult);
}
#endif
nsMargin*
nsBCTableCellFrame::GetBorderWidth(nsMargin& aBorder) const
{
int32_t aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
aBorder.top = BC_BORDER_BOTTOM_HALF_COORD(aPixelsToTwips, mTopBorder);
aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips, mRightBorder);
aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips, mBottomBorder);
aBorder.left = BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips, mLeftBorder);
return &aBorder;
}
BCPixelSize
nsBCTableCellFrame::GetBorderWidth(mozilla::css::Side aSide) const
{
switch(aSide) {
case NS_SIDE_TOP:
return BC_BORDER_BOTTOM_HALF(mTopBorder);
case NS_SIDE_RIGHT:
return BC_BORDER_LEFT_HALF(mRightBorder);
case NS_SIDE_BOTTOM:
return BC_BORDER_TOP_HALF(mBottomBorder);
default:
return BC_BORDER_RIGHT_HALF(mLeftBorder);
}
}
void
nsBCTableCellFrame::SetBorderWidth(mozilla::css::Side aSide,
BCPixelSize aValue)
{
switch(aSide) {
case NS_SIDE_TOP:
mTopBorder = aValue;
break;
case NS_SIDE_RIGHT:
mRightBorder = aValue;
break;
case NS_SIDE_BOTTOM:
mBottomBorder = aValue;
break;
default:
mLeftBorder = aValue;
}
}
/* virtual */ nsMargin
nsBCTableCellFrame::GetBorderOverflow()
{
nsMargin halfBorder;
int32_t p2t = nsPresContext::AppUnitsPerCSSPixel();
halfBorder.top = BC_BORDER_TOP_HALF_COORD(p2t, mTopBorder);
halfBorder.right = BC_BORDER_RIGHT_HALF_COORD(p2t, mRightBorder);
halfBorder.bottom = BC_BORDER_BOTTOM_HALF_COORD(p2t, mBottomBorder);
halfBorder.left = BC_BORDER_LEFT_HALF_COORD(p2t, mLeftBorder);
return halfBorder;
}
void
nsBCTableCellFrame::PaintBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags)
{
// make border-width reflect the half of the border-collapse
// assigned border that's inside the cell
nsMargin borderWidth;
GetBorderWidth(borderWidth);
nsStyleBorder myBorder(*StyleBorder());
NS_FOR_CSS_SIDES(side) {
myBorder.SetBorderWidth(side, borderWidth.Side(side));
}
nsRect rect(aPt, GetSize());
// bypassing nsCSSRendering::PaintBackground is safe because this kind
// of frame cannot be used for the root element
nsCSSRendering::PaintBackgroundWithSC(PresContext(), aRenderingContext, this,
aDirtyRect, rect,
StyleContext(), myBorder,
aFlags, nullptr);
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку