void
nsTextControlFrame::ReflowTextControlChild(nsIFrame* aKid,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsHTMLReflowMetrics& aParentDesiredSize)
{
// compute available size and frame offsets for child
nsSize availSize(aReflowState.ComputedWidth(),
aReflowState.ComputedHeight());
availSize.width = std::max(availSize.width, 0);
availSize.height = std::max(availSize.height, 0);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
aKid, availSize);
// Set computed width and computed height for the child
nscoord width = availSize.width;
width -= kidReflowState.mComputedMargin.LeftRight() +
kidReflowState.mComputedBorderPadding.LeftRight();
width = std::max(width, 0);
kidReflowState.SetComputedWidth(width);
nscoord height = availSize.height;
height -= kidReflowState.mComputedMargin.TopBottom() +
kidReflowState.mComputedBorderPadding.TopBottom();
height = std::max(height, 0);
kidReflowState.SetComputedHeight(height);
// compute the offsets
nscoord xOffset = aReflowState.mComputedBorderPadding.left
+ kidReflowState.mComputedMargin.left;
nscoord yOffset = aReflowState.mComputedBorderPadding.top
+ kidReflowState.mComputedMargin.top;
// reflow the child
nsHTMLReflowMetrics desiredSize;
ReflowChild(aKid, aPresContext, desiredSize, kidReflowState,
xOffset, yOffset, 0, aStatus);
// place the child
FinishReflowChild(aKid, aPresContext, &kidReflowState,
desiredSize, xOffset, yOffset, 0);
// consider the overflow
aParentDesiredSize.mOverflowAreas.UnionWith(desiredSize.mOverflowAreas);
}
nscoord
nsSplittableFrame::GetEffectiveComputedHeight(const nsHTMLReflowState& aReflowState,
nscoord aConsumedHeight) const
{
nscoord height = aReflowState.ComputedHeight();
if (height == NS_INTRINSICSIZE) {
return NS_INTRINSICSIZE;
}
if (aConsumedHeight == NS_INTRINSICSIZE) {
aConsumedHeight = GetConsumedHeight();
}
height -= aConsumedHeight;
// We may have stretched the frame beyond its computed height. Oh well.
return std::max(0, height);
}
void
nsTextControlFrame::ReflowTextControlChild(nsIFrame* aKid,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsHTMLReflowMetrics& aParentDesiredSize)
{
// compute available size and frame offsets for child
WritingMode wm = aKid->GetWritingMode();
LogicalSize availSize = aReflowState.ComputedSizeWithPadding(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
aKid, availSize, nullptr,
nsHTMLReflowState::CALLER_WILL_INIT);
// Override padding with our computed padding in case we got it from theming or percentage
kidReflowState.Init(aPresContext, nullptr, nullptr, &aReflowState.ComputedPhysicalPadding());
// Set computed width and computed height for the child
kidReflowState.SetComputedWidth(aReflowState.ComputedWidth());
kidReflowState.SetComputedHeight(aReflowState.ComputedHeight());
// Offset the frame by the size of the parent's border
nscoord xOffset = aReflowState.ComputedPhysicalBorderPadding().left -
aReflowState.ComputedPhysicalPadding().left;
nscoord yOffset = aReflowState.ComputedPhysicalBorderPadding().top -
aReflowState.ComputedPhysicalPadding().top;
// reflow the child
nsHTMLReflowMetrics desiredSize(aReflowState);
ReflowChild(aKid, aPresContext, desiredSize, kidReflowState,
xOffset, yOffset, 0, aStatus);
// place the child
FinishReflowChild(aKid, aPresContext, desiredSize,
&kidReflowState, xOffset, yOffset, 0);
// consider the overflow
aParentDesiredSize.mOverflowAreas.UnionWith(desiredSize.mOverflowAreas);
}
NS_IMETHODIMP nsProgressFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsProgressFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
NS_ASSERTION(!GetPrevContinuation(),
"nsProgressFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
if (mState & NS_FRAME_FIRST_REFLOW) {
nsFormControlFrame::RegUnRegAccessKey(this, true);
}
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
NS_ASSERTION(barFrame, "The progress frame should have a child with a frame!");
ReflowBarFrame(barFrame, aPresContext, aReflowState, aStatus);
aDesiredSize.width = aReflowState.ComputedWidth() +
aReflowState.mComputedBorderPadding.LeftRight();
aDesiredSize.height = aReflowState.ComputedHeight() +
aReflowState.mComputedBorderPadding.TopBottom();
aDesiredSize.height = NS_CSS_MINMAX(aDesiredSize.height,
aReflowState.mComputedMinHeight,
aReflowState.mComputedMaxHeight);
aDesiredSize.SetOverflowAreasToDesiredBounds();
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
FinishAndStoreOverflow(&aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
// Helper-function that lets us clone the button's reflow state, but with its
// ComputedWidth and ComputedHeight reduced by the amount of renderer-specific
// focus border and padding that we're using. (This lets us provide a more
// appropriate content-box size for descendents' percent sizes to resolve
// against.)
static nsHTMLReflowState
CloneReflowStateWithReducedContentBox(
const nsHTMLReflowState& aButtonReflowState,
const nsMargin& aFocusPadding)
{
nscoord adjustedWidth =
aButtonReflowState.ComputedWidth() - aFocusPadding.LeftRight();
adjustedWidth = std::max(0, adjustedWidth);
// (Only adjust height if it's an actual length.)
nscoord adjustedHeight = aButtonReflowState.ComputedHeight();
if (adjustedHeight != NS_INTRINSICSIZE) {
adjustedHeight -= aFocusPadding.TopBottom();
adjustedHeight = std::max(0, adjustedHeight);
}
nsHTMLReflowState clone(aButtonReflowState);
clone.SetComputedWidth(adjustedWidth);
clone.SetComputedHeight(adjustedHeight);
return clone;
}
static nscoord
FloatMarginWidth(const nsHTMLReflowState& aCBReflowState,
nscoord aFloatAvailableWidth,
nsIFrame *aFloat,
const nsCSSOffsetState& aFloatOffsetState)
{
return aFloat->ComputeSize(
aCBReflowState.rendContext,
nsSize(aCBReflowState.ComputedWidth(),
aCBReflowState.ComputedHeight()),
aFloatAvailableWidth,
nsSize(aFloatOffsetState.mComputedMargin.LeftRight(),
aFloatOffsetState.mComputedMargin.TopBottom()),
nsSize(aFloatOffsetState.mComputedBorderPadding.LeftRight() -
aFloatOffsetState.mComputedPadding.LeftRight(),
aFloatOffsetState.mComputedBorderPadding.TopBottom() -
aFloatOffsetState.mComputedPadding.TopBottom()),
nsSize(aFloatOffsetState.mComputedPadding.LeftRight(),
aFloatOffsetState.mComputedPadding.TopBottom()),
PR_TRUE).width +
aFloatOffsetState.mComputedMargin.LeftRight() +
aFloatOffsetState.mComputedBorderPadding.LeftRight();
}
static nscoord
FloatMarginWidth(const nsHTMLReflowState& aCBReflowState,
nscoord aFloatAvailableWidth,
nsIFrame *aFloat,
const nsCSSOffsetState& aFloatOffsetState)
{
AutoMaybeDisableFontInflation an(aFloat);
return aFloat->ComputeSize(
aCBReflowState.rendContext,
nsSize(aCBReflowState.ComputedWidth(),
aCBReflowState.ComputedHeight()),
aFloatAvailableWidth,
nsSize(aFloatOffsetState.ComputedPhysicalMargin().LeftRight(),
aFloatOffsetState.ComputedPhysicalMargin().TopBottom()),
nsSize(aFloatOffsetState.ComputedPhysicalBorderPadding().LeftRight() -
aFloatOffsetState.ComputedPhysicalPadding().LeftRight(),
aFloatOffsetState.ComputedPhysicalBorderPadding().TopBottom() -
aFloatOffsetState.ComputedPhysicalPadding().TopBottom()),
nsSize(aFloatOffsetState.ComputedPhysicalPadding().LeftRight(),
aFloatOffsetState.ComputedPhysicalPadding().TopBottom()),
true).width +
aFloatOffsetState.ComputedPhysicalMargin().LeftRight() +
aFloatOffsetState.ComputedPhysicalBorderPadding().LeftRight();
}
nsColumnSetFrame::ReflowConfig
nsColumnSetFrame::ChooseColumnStrategy(const nsHTMLReflowState& aReflowState)
{
const nsStyleColumn* colStyle = GetStyleColumn();
nscoord availContentWidth = GetAvailableContentWidth(aReflowState);
if (aReflowState.ComputedWidth() != NS_INTRINSICSIZE) {
availContentWidth = aReflowState.ComputedWidth();
}
nscoord colHeight = GetAvailableContentHeight(aReflowState);
if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
colHeight = aReflowState.ComputedHeight();
}
nscoord colGap = GetColumnGap(this, colStyle);
PRInt32 numColumns = colStyle->mColumnCount;
const PRUint32 MAX_NESTED_COLUMN_BALANCING = 2;
PRUint32 cnt = 1;
for (const nsHTMLReflowState* rs = aReflowState.parentReflowState; rs && cnt
< MAX_NESTED_COLUMN_BALANCING; rs = rs->parentReflowState) {
if (rs->mFlags.mIsColumnBalancing) {
++cnt;
}
}
if (cnt == MAX_NESTED_COLUMN_BALANCING) {
numColumns = 1;
}
nscoord colWidth;
if (colStyle->mColumnWidth.GetUnit() == eStyleUnit_Coord) {
colWidth = colStyle->mColumnWidth.GetCoordValue();
NS_ASSERTION(colWidth >= 0, "negative column width");
// Reduce column count if necessary to make columns fit in the
// available width. Compute max number of columns that fit in
// availContentWidth, satisfying colGap*(maxColumns - 1) +
// colWidth*maxColumns <= availContentWidth
if (availContentWidth != NS_INTRINSICSIZE && colGap + colWidth > 0
&& numColumns > 0) {
// This expression uses truncated rounding, which is what we
// want
PRInt32 maxColumns = (availContentWidth + colGap)/(colGap + colWidth);
numColumns = NS_MAX(1, NS_MIN(numColumns, maxColumns));
}
} else if (numColumns > 0 && availContentWidth != NS_INTRINSICSIZE) {
nscoord widthMinusGaps = availContentWidth - colGap*(numColumns - 1);
colWidth = widthMinusGaps/numColumns;
} else {
colWidth = NS_INTRINSICSIZE;
}
// Take care of the situation where there's only one column but it's
// still too wide
colWidth = NS_MAX(1, NS_MIN(colWidth, availContentWidth));
nscoord expectedWidthLeftOver = 0;
if (colWidth != NS_INTRINSICSIZE && availContentWidth != NS_INTRINSICSIZE) {
// distribute leftover space
// First, determine how many columns will be showing if the column
// count is auto
if (numColumns <= 0) {
// choose so that colGap*(nominalColumnCount - 1) +
// colWidth*nominalColumnCount is nearly availContentWidth
// make sure to round down
if (colGap + colWidth > 0) {
numColumns = (availContentWidth + colGap)/(colGap + colWidth);
}
if (numColumns <= 0) {
numColumns = 1;
}
}
// Compute extra space and divide it among the columns
nscoord extraSpace =
NS_MAX(0, availContentWidth - (colWidth*numColumns + colGap*(numColumns - 1)));
nscoord extraToColumns = extraSpace/numColumns;
colWidth += extraToColumns;
expectedWidthLeftOver = extraSpace - (extraToColumns*numColumns);
}
// NOTE that the non-balancing behavior for non-auto computed height
// is not in the CSS3 columns draft as of 18 January 2001
if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) {
// Balancing!
if (numColumns <= 0) {
// Hmm, auto column count, column width or available width is unknown,
// and balancing is required. Let's just use one column then.
numColumns = 1;
}
colHeight = NS_MIN(mLastBalanceHeight, GetAvailableContentHeight(aReflowState));
} else {
// No balancing, so don't limit the column count
numColumns = PR_INT32_MAX;
}
#ifdef DEBUG_roc
printf("*** nsColumnSetFrame::ChooseColumnStrategy: numColumns=%d, colWidth=%d, expectedWidthLeftOver=%d, colHeight=%d, colGap=%d\n",
numColumns, colWidth, expectedWidthLeftOver, colHeight, colGap);
#endif
ReflowConfig config = { numColumns, colWidth, expectedWidthLeftOver, colGap, colHeight };
return config;
}
bool
nsColumnSetFrame::ReflowChildren(nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
const ReflowConfig& aConfig,
bool aUnboundedLastColumn,
nsCollapsingMargin* aBottomMarginCarriedOut,
ColumnBalanceData& aColData)
{
aColData.Reset();
bool allFit = true;
bool RTL = GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL;
bool shrinkingHeightOnly = !NS_SUBTREE_DIRTY(this) &&
mLastBalanceHeight > aConfig.mColMaxHeight;
#ifdef DEBUG_roc
printf("*** Doing column reflow pass: mLastBalanceHeight=%d, mColMaxHeight=%d, RTL=%d\n, mBalanceColCount=%d, mColWidth=%d, mColGap=%d\n",
mLastBalanceHeight, aConfig.mColMaxHeight, RTL, aConfig.mBalanceColCount,
aConfig.mColWidth, aConfig.mColGap);
#endif
DrainOverflowColumns();
if (mLastBalanceHeight != aConfig.mColMaxHeight) {
mLastBalanceHeight = aConfig.mColMaxHeight;
// XXX Seems like this could fire if incremental reflow pushed the column set
// down so we reflow incrementally with a different available height.
// We need a way to do an incremental reflow and be sure availableHeight
// changes are taken account of! Right now I think block frames with absolute
// children might exit early.
//NS_ASSERTION(aKidReason != eReflowReason_Incremental,
// "incremental reflow should not have changed the balance height");
}
// get our border and padding
const nsMargin &borderPadding = aReflowState.mComputedBorderPadding;
nsRect contentRect(0, 0, 0, 0);
nsOverflowAreas overflowRects;
nsIFrame* child = mFrames.FirstChild();
nsPoint childOrigin = nsPoint(borderPadding.left, borderPadding.top);
// For RTL, figure out where the last column's left edge should be. Since the
// columns might not fill the frame exactly, we need to account for the
// slop. Otherwise we'll waste time moving the columns by some tiny
// amount unnecessarily.
nscoord targetX = borderPadding.left;
if (RTL) {
nscoord availWidth = aReflowState.availableWidth;
if (aReflowState.ComputedWidth() != NS_INTRINSICSIZE) {
availWidth = aReflowState.ComputedWidth();
}
if (availWidth != NS_INTRINSICSIZE) {
childOrigin.x += availWidth - aConfig.mColWidth;
targetX += aConfig.mExpectedWidthLeftOver;
#ifdef DEBUG_roc
printf("*** childOrigin.x = %d\n", childOrigin.x);
#endif
}
}
int columnCount = 0;
int contentBottom = 0;
bool reflowNext = false;
while (child) {
// Try to skip reflowing the child. We can't skip if the child is dirty. We also can't
// skip if the next column is dirty, because the next column's first line(s)
// might be pullable back to this column. We can't skip if it's the last child
// because we need to obtain the bottom margin. We can't skip
// if this is the last column and we're supposed to assign unbounded
// height to it, because that could change the available height from
// the last time we reflowed it and we should try to pull all the
// content from its next sibling. (Note that it might be the last
// column, but not be the last child because the desired number of columns
// has changed.)
bool skipIncremental = !aReflowState.ShouldReflowAllKids()
&& !NS_SUBTREE_DIRTY(child)
&& child->GetNextSibling()
&& !(aUnboundedLastColumn && columnCount == aConfig.mBalanceColCount - 1)
&& !NS_SUBTREE_DIRTY(child->GetNextSibling());
// If we need to pull up content from the prev-in-flow then this is not just
// a height shrink. The prev in flow will have set the dirty bit.
// Check the overflow rect YMost instead of just the child's content height. The child
// may have overflowing content that cares about the available height boundary.
// (It may also have overflowing content that doesn't care about the available height
// boundary, but if so, too bad, this optimization is defeated.)
// We want scrollable overflow here since this is a calculation that
// affects layout.
bool skipResizeHeightShrink = shrinkingHeightOnly
&& child->GetScrollableOverflowRect().YMost() <= aConfig.mColMaxHeight;
nscoord childContentBottom = 0;
if (!reflowNext && (skipIncremental || skipResizeHeightShrink)) {
// This child does not need to be reflowed, but we may need to move it
MoveChildTo(this, child, childOrigin);
// If this is the last frame then make sure we get the right status
nsIFrame* kidNext = child->GetNextSibling();
if (kidNext) {
aStatus = (kidNext->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)
? NS_FRAME_OVERFLOW_INCOMPLETE
: NS_FRAME_NOT_COMPLETE;
} else {
aStatus = mLastFrameStatus;
}
childContentBottom = nsLayoutUtils::CalculateContentBottom(child);
#ifdef DEBUG_roc
printf("*** Skipping child #%d %p (incremental %d, resize height shrink %d): status = %d\n",
columnCount, (void*)child, skipIncremental, skipResizeHeightShrink, aStatus);
#endif
} else {
nsSize availSize(aConfig.mColWidth, aConfig.mColMaxHeight);
if (aUnboundedLastColumn && columnCount == aConfig.mBalanceColCount - 1) {
availSize.height = GetAvailableContentHeight(aReflowState);
}
if (reflowNext)
child->AddStateBits(NS_FRAME_IS_DIRTY);
nsHTMLReflowState kidReflowState(PresContext(), aReflowState, child,
availSize, availSize.width,
aReflowState.ComputedHeight());
kidReflowState.mFlags.mIsTopOfPage = true;
kidReflowState.mFlags.mTableIsSplittable = false;
kidReflowState.mFlags.mIsColumnBalancing = aConfig.mBalanceColCount < PR_INT32_MAX;
#ifdef DEBUG_roc
printf("*** Reflowing child #%d %p: availHeight=%d\n",
columnCount, (void*)child,availSize.height);
#endif
// Note if the column's next in flow is not being changed by this incremental reflow.
// This may allow the current column to avoid trying to pull lines from the next column.
if (child->GetNextSibling() &&
!(GetStateBits() & NS_FRAME_IS_DIRTY) &&
!(child->GetNextSibling()->GetStateBits() & NS_FRAME_IS_DIRTY)) {
kidReflowState.mFlags.mNextInFlowUntouched = true;
}
nsHTMLReflowMetrics kidDesiredSize(aDesiredSize.mFlags);
// XXX it would be cool to consult the float manager for the
// previous block to figure out the region of floats from the
// previous column that extend into this column, and subtract
// that region from the new float manager. So you could stick a
// really big float in the first column and text in following
// columns would flow around it.
// Reflow the frame
ReflowChild(child, PresContext(), kidDesiredSize, kidReflowState,
childOrigin.x + kidReflowState.mComputedMargin.left,
childOrigin.y + kidReflowState.mComputedMargin.top,
0, aStatus);
reflowNext = (aStatus & NS_FRAME_REFLOW_NEXTINFLOW) != 0;
#ifdef DEBUG_roc
printf("*** Reflowed child #%d %p: status = %d, desiredSize=%d,%d CarriedOutBottomMargin=%d\n",
columnCount, (void*)child, aStatus, kidDesiredSize.width, kidDesiredSize.height,
kidDesiredSize.mCarriedOutBottomMargin.get());
#endif
NS_FRAME_TRACE_REFLOW_OUT("Column::Reflow", aStatus);
*aBottomMarginCarriedOut = kidDesiredSize.mCarriedOutBottomMargin;
FinishReflowChild(child, PresContext(), &kidReflowState,
kidDesiredSize, childOrigin.x, childOrigin.y, 0);
childContentBottom = nsLayoutUtils::CalculateContentBottom(child);
if (childContentBottom > aConfig.mColMaxHeight) {
allFit = false;
}
if (childContentBottom > availSize.height) {
aColData.mMaxOverflowingHeight = NS_MAX(childContentBottom,
aColData.mMaxOverflowingHeight);
}
}
contentRect.UnionRect(contentRect, child->GetRect());
ConsiderChildOverflow(overflowRects, child);
contentBottom = NS_MAX(contentBottom, childContentBottom);
aColData.mLastHeight = childContentBottom;
aColData.mSumHeight += childContentBottom;
// Build a continuation column if necessary
nsIFrame* kidNextInFlow = child->GetNextInFlow();
if (NS_FRAME_IS_FULLY_COMPLETE(aStatus) && !NS_FRAME_IS_TRUNCATED(aStatus)) {
NS_ASSERTION(!kidNextInFlow, "next in flow should have been deleted");
child = nsnull;
break;
} else {
++columnCount;
// Make sure that the column has a next-in-flow. If not, we must
// create one to hold the overflowing stuff, even if we're just
// going to put it on our overflow list and let *our*
// next in flow handle it.
if (!kidNextInFlow) {
NS_ASSERTION(aStatus & NS_FRAME_REFLOW_NEXTINFLOW,
"We have to create a continuation, but the block doesn't want us to reflow it?");
// We need to create a continuing column
nsresult rv = CreateNextInFlow(PresContext(), child, kidNextInFlow);
if (NS_FAILED(rv)) {
NS_NOTREACHED("Couldn't create continuation");
child = nsnull;
break;
}
}
// Make sure we reflow a next-in-flow when it switches between being
// normal or overflow container
if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aStatus)) {
if (!(kidNextInFlow->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
aStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
reflowNext = true;
kidNextInFlow->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
}
else if (kidNextInFlow->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
aStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
reflowNext = true;
kidNextInFlow->RemoveStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
if (columnCount >= aConfig.mBalanceColCount) {
// No more columns allowed here. Stop.
aStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
kidNextInFlow->AddStateBits(NS_FRAME_IS_DIRTY);
// Move any of our leftover columns to our overflow list. Our
// next-in-flow will eventually pick them up.
const nsFrameList& continuationColumns = mFrames.RemoveFramesAfter(child);
if (continuationColumns.NotEmpty()) {
SetOverflowFrames(PresContext(), continuationColumns);
}
child = nsnull;
break;
}
}
if (PresContext()->HasPendingInterrupt()) {
// Stop the loop now while |child| still points to the frame that bailed
// out. We could keep going here and condition a bunch of the code in
// this loop on whether there's an interrupt, or even just keep going and
// trying to reflow the blocks (even though we know they'll interrupt
// right after their first line), but stopping now is conceptually the
// simplest (and probably fastest) thing.
break;
}
// Advance to the next column
child = child->GetNextSibling();
if (child) {
if (!RTL) {
childOrigin.x += aConfig.mColWidth + aConfig.mColGap;
} else {
childOrigin.x -= aConfig.mColWidth + aConfig.mColGap;
}
#ifdef DEBUG_roc
printf("*** NEXT CHILD ORIGIN.x = %d\n", childOrigin.x);
#endif
}
}
if (PresContext()->CheckForInterrupt(this) &&
(GetStateBits() & NS_FRAME_IS_DIRTY)) {
// Mark all our kids starting with |child| dirty
// Note that this is a CheckForInterrupt call, not a HasPendingInterrupt,
// because we might have interrupted while reflowing |child|, and since
// we're about to add a dirty bit to |child| we need to make sure that
// |this| is scheduled to have dirty bits marked on it and its ancestors.
// Otherwise, when we go to mark dirty bits on |child|'s ancestors we'll
// bail out immediately, since it'll already have a dirty bit.
for (; child; child = child->GetNextSibling()) {
child->AddStateBits(NS_FRAME_IS_DIRTY);
}
}
// If we're doing RTL, we need to make sure our last column is at the left-hand side of the frame.
if (RTL && childOrigin.x != targetX) {
overflowRects.Clear();
contentRect = nsRect(0, 0, 0, 0);
PRInt32 deltaX = targetX - childOrigin.x;
#ifdef DEBUG_roc
printf("*** CHILDORIGIN.x = %d, targetX = %d, DELTAX = %d\n", childOrigin.x, targetX, deltaX);
#endif
for (child = mFrames.FirstChild(); child; child = child->GetNextSibling()) {
MoveChildTo(this, child, child->GetPosition() + nsPoint(deltaX, 0));
ConsiderChildOverflow(overflowRects, child);
contentRect.UnionRect(contentRect, child->GetRect());
}
}
aColData.mMaxHeight = contentBottom;
contentRect.height = NS_MAX(contentRect.height, contentBottom);
mLastFrameStatus = aStatus;
// contentRect included the borderPadding.left,borderPadding.top of the child rects
contentRect -= nsPoint(borderPadding.left, borderPadding.top);
nsSize contentSize = nsSize(contentRect.XMost(), contentRect.YMost());
// Apply computed and min/max values
if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
contentSize.height = aReflowState.ComputedHeight();
} else {
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxHeight) {
contentSize.height = NS_MIN(aReflowState.mComputedMaxHeight, contentSize.height);
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinHeight) {
contentSize.height = NS_MAX(aReflowState.mComputedMinHeight, contentSize.height);
}
}
if (aReflowState.ComputedWidth() != NS_INTRINSICSIZE) {
contentSize.width = aReflowState.ComputedWidth();
} else {
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxWidth) {
contentSize.width = NS_MIN(aReflowState.mComputedMaxWidth, contentSize.width);
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinWidth) {
contentSize.width = NS_MAX(aReflowState.mComputedMinWidth, contentSize.width);
}
}
aDesiredSize.height = borderPadding.top + contentSize.height +
borderPadding.bottom;
aDesiredSize.width = contentSize.width + borderPadding.left + borderPadding.right;
aDesiredSize.mOverflowAreas = overflowRects;
aDesiredSize.UnionOverflowAreasWithDesiredBounds();
#ifdef DEBUG_roc
printf("*** DONE PASS feasible=%d\n", allFit && NS_FRAME_IS_FULLY_COMPLETE(aStatus)
&& !NS_FRAME_IS_TRUNCATED(aStatus));
#endif
return allFit && NS_FRAME_IS_FULLY_COMPLETE(aStatus)
&& !NS_FRAME_IS_TRUNCATED(aStatus);
}
nsBlockReflowState::nsBlockReflowState(const nsHTMLReflowState& aReflowState,
nsPresContext* aPresContext,
nsBlockFrame* aFrame,
bool aBStartMarginRoot,
bool aBEndMarginRoot,
bool aBlockNeedsFloatManager,
nscoord aConsumedBSize)
: mBlock(aFrame),
mPresContext(aPresContext),
mReflowState(aReflowState),
mContentArea(aReflowState.GetWritingMode()),
mPushedFloats(nullptr),
mOverflowTracker(nullptr),
mBorderPadding(mReflowState.ComputedLogicalBorderPadding()),
mPrevBEndMargin(),
mLineNumber(0),
mFlags(0),
mFloatBreakType(NS_STYLE_CLEAR_NONE),
mConsumedBSize(aConsumedBSize)
{
if (!sFloatFragmentsInsideColumnPrefCached) {
sFloatFragmentsInsideColumnPrefCached = true;
Preferences::AddBoolVarCache(&sFloatFragmentsInsideColumnEnabled,
"layout.float-fragments-inside-column.enabled");
}
SetFlag(BRS_FLOAT_FRAGMENTS_INSIDE_COLUMN_ENABLED, sFloatFragmentsInsideColumnEnabled);
WritingMode wm = aReflowState.GetWritingMode();
SetFlag(BRS_ISFIRSTINFLOW, aFrame->GetPrevInFlow() == nullptr);
SetFlag(BRS_ISOVERFLOWCONTAINER, IS_TRUE_OVERFLOW_CONTAINER(aFrame));
nsIFrame::LogicalSides logicalSkipSides =
aFrame->GetLogicalSkipSides(&aReflowState);
mBorderPadding.ApplySkipSides(logicalSkipSides);
// Note that mContainerSize is the physical size, needed to
// convert logical block-coordinates in vertical-rl writing mode
// (measured from a RHS origin) to physical coordinates within the
// containing block.
// If aReflowState doesn't have a constrained ComputedWidth(), we set
// mContainerSize.width to zero, which means lines will be positioned
// (physically) incorrectly; we will fix them up at the end of
// nsBlockFrame::Reflow, after we know the total block-size of the
// frame.
mContainerSize.width = aReflowState.ComputedWidth();
if (mContainerSize.width == NS_UNCONSTRAINEDSIZE) {
mContainerSize.width = 0;
}
mContainerSize.width += mBorderPadding.LeftRight(wm);
// For now at least, we don't do that fix-up for mContainerHeight.
// It's only used in nsBidiUtils::ReorderFrames for vertical rtl
// writing modes, which aren't fully supported for the time being.
mContainerSize.height = aReflowState.ComputedHeight() +
mBorderPadding.TopBottom(wm);
if ((aBStartMarginRoot && !logicalSkipSides.BStart()) ||
0 != mBorderPadding.BStart(wm)) {
SetFlag(BRS_ISBSTARTMARGINROOT, true);
SetFlag(BRS_APPLYBSTARTMARGIN, true);
}
if ((aBEndMarginRoot && !logicalSkipSides.BEnd()) ||
0 != mBorderPadding.BEnd(wm)) {
SetFlag(BRS_ISBENDMARGINROOT, true);
}
if (aBlockNeedsFloatManager) {
SetFlag(BRS_FLOAT_MGR, true);
}
mFloatManager = aReflowState.mFloatManager;
NS_ASSERTION(mFloatManager,
"FloatManager should be set in nsBlockReflowState" );
if (mFloatManager) {
// Save the coordinate system origin for later.
mFloatManager->GetTranslation(mFloatManagerI, mFloatManagerB);
mFloatManager->PushState(&mFloatManagerStateBefore); // never popped
}
mReflowStatus = NS_FRAME_COMPLETE;
mNextInFlow = static_cast<nsBlockFrame*>(mBlock->GetNextInFlow());
LAYOUT_WARN_IF_FALSE(NS_UNCONSTRAINEDSIZE != aReflowState.ComputedISize(),
"have unconstrained width; this should only result "
"from very large sizes, not attempts at intrinsic "
"width calculation");
mContentArea.ISize(wm) = aReflowState.ComputedISize();
// Compute content area height. Unlike the width, if we have a
// specified style height we ignore it since extra content is
// managed by the "overflow" property. When we don't have a
// specified style height then we may end up limiting our height if
// the availableHeight is constrained (this situation occurs when we
// are paginated).
if (NS_UNCONSTRAINEDSIZE != aReflowState.AvailableBSize()) {
// We are in a paginated situation. The bottom edge is just inside
// the bottom border and padding. The content area height doesn't
// include either border or padding edge.
mBEndEdge = aReflowState.AvailableBSize() - mBorderPadding.BEnd(wm);
mContentArea.BSize(wm) = std::max(0, mBEndEdge - mBorderPadding.BStart(wm));
}
else {
// When we are not in a paginated situation then we always use
// an constrained height.
SetFlag(BRS_UNCONSTRAINEDBSIZE, true);
mContentArea.BSize(wm) = mBEndEdge = NS_UNCONSTRAINEDSIZE;
}
mContentArea.IStart(wm) = mBorderPadding.IStart(wm);
mBCoord = mContentArea.BStart(wm) = mBorderPadding.BStart(wm);
mPrevChild = nullptr;
mCurrentLine = aFrame->end_lines();
mMinLineHeight = aReflowState.CalcLineHeight();
}
void
nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame* aDelegatingFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
const nsRect& aContainingBlock,
bool aConstrainHeight,
nsIFrame* aKidFrame,
nsReflowStatus& aStatus,
nsOverflowAreas* aOverflowAreas)
{
#ifdef DEBUG
if (nsBlockFrame::gNoisyReflow) {
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
printf("abs pos ");
if (aKidFrame) {
nsAutoString name;
aKidFrame->GetFrameName(name);
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
}
char width[16];
char height[16];
PrettyUC(aReflowState.AvailableWidth(), width);
PrettyUC(aReflowState.AvailableHeight(), height);
printf(" a=%s,%s ", width, height);
PrettyUC(aReflowState.ComputedWidth(), width);
PrettyUC(aReflowState.ComputedHeight(), height);
printf("c=%s,%s \n", width, height);
}
AutoNoisyIndenter indent(nsBlockFrame::gNoisy);
#endif // DEBUG
WritingMode wm = aKidFrame->GetWritingMode();
nscoord availISize = LogicalSize(wm, aContainingBlock.Size()).ISize(wm);
if (availISize == -1) {
NS_ASSERTION(aReflowState.ComputedSize(wm).ISize(wm) !=
NS_UNCONSTRAINEDSIZE,
"Must have a useful inline-size _somewhere_");
availISize =
aReflowState.ComputedSizeWithPadding(wm).ISize(wm);
}
nsHTMLReflowMetrics kidDesiredSize(aReflowState);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
LogicalSize(wm, availISize,
NS_UNCONSTRAINEDSIZE),
aContainingBlock.width,
aContainingBlock.height);
// Get the border values
const nsMargin& border = aReflowState.mStyleBorder->GetComputedBorder();
bool constrainHeight = (aReflowState.AvailableHeight() != NS_UNCONSTRAINEDSIZE)
&& aConstrainHeight
// Don't split if told not to (e.g. for fixed frames)
&& (aDelegatingFrame->GetType() != nsGkAtoms::inlineFrame)
//XXX we don't handle splitting frames for inline absolute containing blocks yet
&& (aKidFrame->GetRect().y <= aReflowState.AvailableHeight());
// Don't split things below the fold. (Ideally we shouldn't *have*
// anything totally below the fold, but we can't position frames
// across next-in-flow breaks yet.
if (constrainHeight) {
kidReflowState.AvailableHeight() = aReflowState.AvailableHeight() - border.top
- kidReflowState.ComputedPhysicalMargin().top;
if (NS_AUTOOFFSET != kidReflowState.ComputedPhysicalOffsets().top)
kidReflowState.AvailableHeight() -= kidReflowState.ComputedPhysicalOffsets().top;
}
// Do the reflow
aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowState, aStatus);
// If we're solving for 'left' or 'top', then compute it now that we know the
// width/height
if ((NS_AUTOOFFSET == kidReflowState.ComputedPhysicalOffsets().left) ||
(NS_AUTOOFFSET == kidReflowState.ComputedPhysicalOffsets().top)) {
nscoord aContainingBlockWidth = aContainingBlock.width;
nscoord aContainingBlockHeight = aContainingBlock.height;
if (-1 == aContainingBlockWidth) {
// Get the containing block width/height
kidReflowState.ComputeContainingBlockRectangle(aPresContext,
&aReflowState,
aContainingBlockWidth,
aContainingBlockHeight);
}
if (NS_AUTOOFFSET == kidReflowState.ComputedPhysicalOffsets().left) {
NS_ASSERTION(NS_AUTOOFFSET != kidReflowState.ComputedPhysicalOffsets().right,
"Can't solve for both left and right");
kidReflowState.ComputedPhysicalOffsets().left = aContainingBlockWidth -
kidReflowState.ComputedPhysicalOffsets().right -
kidReflowState.ComputedPhysicalMargin().right -
kidDesiredSize.Width() -
kidReflowState.ComputedPhysicalMargin().left;
}
if (NS_AUTOOFFSET == kidReflowState.ComputedPhysicalOffsets().top) {
kidReflowState.ComputedPhysicalOffsets().top = aContainingBlockHeight -
kidReflowState.ComputedPhysicalOffsets().bottom -
kidReflowState.ComputedPhysicalMargin().bottom -
kidDesiredSize.Height() -
kidReflowState.ComputedPhysicalMargin().top;
}
}
// Position the child relative to our padding edge
nsRect rect(border.left + kidReflowState.ComputedPhysicalOffsets().left + kidReflowState.ComputedPhysicalMargin().left,
border.top + kidReflowState.ComputedPhysicalOffsets().top + kidReflowState.ComputedPhysicalMargin().top,
kidDesiredSize.Width(), kidDesiredSize.Height());
// Offset the frame rect by the given origin of the absolute containing block.
// If the frame is auto-positioned on both sides of an axis, it will be
// positioned based on its containing block and we don't need to offset.
if (aContainingBlock.TopLeft() != nsPoint(0, 0)) {
if (!(kidReflowState.mStylePosition->mOffset.GetLeftUnit() == eStyleUnit_Auto &&
kidReflowState.mStylePosition->mOffset.GetRightUnit() == eStyleUnit_Auto)) {
rect.x += aContainingBlock.x;
}
if (!(kidReflowState.mStylePosition->mOffset.GetTopUnit() == eStyleUnit_Auto &&
kidReflowState.mStylePosition->mOffset.GetBottomUnit() == eStyleUnit_Auto)) {
rect.y += aContainingBlock.y;
}
}
aKidFrame->SetRect(rect);
nsView* view = aKidFrame->GetView();
if (view) {
// Size and position the view and set its opacity, visibility, content
// transparency, and clip
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
kidDesiredSize.VisualOverflow());
} else {
nsContainerFrame::PositionChildViews(aKidFrame);
}
aKidFrame->DidReflow(aPresContext, &kidReflowState, nsDidReflowStatus::FINISHED);
#ifdef DEBUG
if (nsBlockFrame::gNoisyReflow) {
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent - 1);
printf("abs pos ");
if (aKidFrame) {
nsAutoString name;
aKidFrame->GetFrameName(name);
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
}
printf("%p rect=%d,%d,%d,%d\n", static_cast<void*>(aKidFrame),
rect.x, rect.y, rect.width, rect.height);
}
#endif
if (aOverflowAreas) {
aOverflowAreas->UnionWith(kidDesiredSize.mOverflowAreas + rect.TopLeft());
}
}
void
nsProgressFrame::ReflowBarFrame(nsIFrame* aBarFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
bool vertical = GetStyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL;
nsHTMLReflowState reflowState(aPresContext, aReflowState, aBarFrame,
nsSize(aReflowState.ComputedWidth(),
NS_UNCONSTRAINEDSIZE));
nscoord size = vertical ? aReflowState.ComputedHeight()
: aReflowState.ComputedWidth();
nscoord xoffset = aReflowState.mComputedBorderPadding.left;
nscoord yoffset = aReflowState.mComputedBorderPadding.top;
double position;
nsCOMPtr<nsIDOMHTMLProgressElement> progressElement =
do_QueryInterface(mContent);
progressElement->GetPosition(&position);
// Force the bar's size to match the current progress.
// When indeterminate, the progress' size will be 100%.
if (position >= 0.0) {
size *= position;
}
if (!vertical && GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
xoffset += aReflowState.ComputedWidth() - size;
}
// The bar size is fixed in these cases:
// - the progress position is determined: the bar size is fixed according
// to it's value.
// - the progress position is indeterminate and the bar appearance should be
// shown as native: the bar size is forced to 100%.
// Otherwise (when the progress is indeterminate and the bar appearance isn't
// native), the bar size isn't fixed and can be set by the author.
if (position != -1 || ShouldUseNativeStyle()) {
if (vertical) {
// We want the bar to begin at the bottom.
yoffset += aReflowState.ComputedHeight() - size;
size -= reflowState.mComputedMargin.TopBottom() +
reflowState.mComputedBorderPadding.TopBottom();
size = NS_MAX(size, 0);
reflowState.SetComputedHeight(size);
} else {
size -= reflowState.mComputedMargin.LeftRight() +
reflowState.mComputedBorderPadding.LeftRight();
size = NS_MAX(size, 0);
reflowState.SetComputedWidth(size);
}
} else if (vertical) {
// For vertical progress bars, we need to position the bar specificly when
// the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
// because aReflowState.ComputedHeight() - size == 0.
yoffset += aReflowState.ComputedHeight() - reflowState.ComputedHeight();
}
xoffset += reflowState.mComputedMargin.left;
yoffset += reflowState.mComputedMargin.top;
nsHTMLReflowMetrics barDesiredSize;
ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
yoffset, 0, aStatus);
FinishReflowChild(aBarFrame, aPresContext, &reflowState, barDesiredSize,
xoffset, yoffset, 0);
}
void
nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame* aDelegatingFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
const nsRect& aContainingBlock,
AbsPosReflowFlags aFlags,
nsIFrame* aKidFrame,
nsReflowStatus& aStatus,
nsOverflowAreas* aOverflowAreas)
{
#ifdef DEBUG
if (nsBlockFrame::gNoisyReflow) {
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
printf("abs pos ");
if (aKidFrame) {
nsAutoString name;
aKidFrame->GetFrameName(name);
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
}
char width[16];
char height[16];
PrettyUC(aReflowState.AvailableWidth(), width, 16);
PrettyUC(aReflowState.AvailableHeight(), height, 16);
printf(" a=%s,%s ", width, height);
PrettyUC(aReflowState.ComputedWidth(), width, 16);
PrettyUC(aReflowState.ComputedHeight(), height, 16);
printf("c=%s,%s \n", width, height);
}
AutoNoisyIndenter indent(nsBlockFrame::gNoisy);
#endif // DEBUG
WritingMode wm = aKidFrame->GetWritingMode();
LogicalSize logicalCBSize(wm, aContainingBlock.Size());
nscoord availISize = logicalCBSize.ISize(wm);
if (availISize == -1) {
NS_ASSERTION(aReflowState.ComputedSize(wm).ISize(wm) !=
NS_UNCONSTRAINEDSIZE,
"Must have a useful inline-size _somewhere_");
availISize =
aReflowState.ComputedSizeWithPadding(wm).ISize(wm);
}
uint32_t rsFlags = 0;
if (aFlags & AbsPosReflowFlags::eIsGridContainerCB) {
// When a grid container generates the abs.pos. CB for a *child* then
// the static-position is the CB origin (i.e. of the grid area rect).
// https://drafts.csswg.org/css-grid/#static-position
nsIFrame* placeholder =
aPresContext->PresShell()->GetPlaceholderFrameFor(aKidFrame);
if (placeholder && placeholder->GetParent() == aDelegatingFrame) {
rsFlags |= nsHTMLReflowState::STATIC_POS_IS_CB_ORIGIN;
}
}
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
LogicalSize(wm, availISize,
NS_UNCONSTRAINEDSIZE),
&logicalCBSize, rsFlags);
// Get the border values
WritingMode outerWM = aReflowState.GetWritingMode();
const LogicalMargin border(outerWM,
aReflowState.mStyleBorder->GetComputedBorder());
const LogicalMargin margin =
kidReflowState.ComputedLogicalMargin().ConvertTo(outerWM, wm);
bool constrainBSize = (aReflowState.AvailableBSize() != NS_UNCONSTRAINEDSIZE)
&& (aFlags & AbsPosReflowFlags::eConstrainHeight)
// Don't split if told not to (e.g. for fixed frames)
&& (aDelegatingFrame->GetType() != nsGkAtoms::inlineFrame)
//XXX we don't handle splitting frames for inline absolute containing blocks yet
&& (aKidFrame->GetLogicalRect(aContainingBlock.Size()).BStart(wm) <=
aReflowState.AvailableBSize());
// Don't split things below the fold. (Ideally we shouldn't *have*
// anything totally below the fold, but we can't position frames
// across next-in-flow breaks yet.
if (constrainBSize) {
kidReflowState.AvailableBSize() =
aReflowState.AvailableBSize() - border.ConvertTo(wm, outerWM).BStart(wm) -
kidReflowState.ComputedLogicalMargin().BStart(wm);
if (NS_AUTOOFFSET != kidReflowState.ComputedLogicalOffsets().BStart(wm)) {
kidReflowState.AvailableBSize() -=
kidReflowState.ComputedLogicalOffsets().BStart(wm);
}
}
// Do the reflow
nsHTMLReflowMetrics kidDesiredSize(kidReflowState);
aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowState, aStatus);
const LogicalSize kidSize = kidDesiredSize.Size(wm).ConvertTo(outerWM, wm);
LogicalMargin offsets =
kidReflowState.ComputedLogicalOffsets().ConvertTo(outerWM, wm);
// If we're solving for start in either inline or block direction,
// then compute it now that we know the dimensions.
if ((NS_AUTOOFFSET == offsets.IStart(outerWM)) ||
(NS_AUTOOFFSET == offsets.BStart(outerWM))) {
if (-1 == logicalCBSize.ISize(wm)) {
// Get the containing block width/height
logicalCBSize =
kidReflowState.ComputeContainingBlockRectangle(aPresContext,
&aReflowState);
}
if (NS_AUTOOFFSET == offsets.IStart(outerWM)) {
NS_ASSERTION(NS_AUTOOFFSET != offsets.IEnd(outerWM),
"Can't solve for both start and end");
offsets.IStart(outerWM) =
logicalCBSize.ConvertTo(outerWM, wm).ISize(outerWM) -
offsets.IEnd(outerWM) - margin.IStartEnd(outerWM) -
kidSize.ISize(outerWM);
}
if (NS_AUTOOFFSET == offsets.BStart(outerWM)) {
offsets.BStart(outerWM) =
logicalCBSize.ConvertTo(outerWM, wm).BSize(outerWM) -
offsets.BEnd(outerWM) - margin.BStartEnd(outerWM) -
kidSize.BSize(outerWM);
}
kidReflowState.SetComputedLogicalOffsets(offsets.ConvertTo(wm, outerWM));
}
// Position the child relative to our padding edge
LogicalRect rect(outerWM,
border.IStart(outerWM) + offsets.IStart(outerWM) +
margin.IStart(outerWM),
border.BStart(outerWM) + offsets.BStart(outerWM) +
margin.BStart(outerWM),
kidSize.ISize(outerWM), kidSize.BSize(outerWM));
nsRect r =
rect.GetPhysicalRect(outerWM, logicalCBSize.GetPhysicalSize(wm) +
border.Size(outerWM).GetPhysicalSize(outerWM));
// Offset the frame rect by the given origin of the absolute containing block.
// If the frame is auto-positioned on both sides of an axis, it will be
// positioned based on its containing block and we don't need to offset
// (unless the caller demands it (the STATIC_POS_IS_CB_ORIGIN case)).
if (aContainingBlock.TopLeft() != nsPoint(0, 0)) {
const nsStyleSides& offsets = kidReflowState.mStylePosition->mOffset;
if (!(offsets.GetLeftUnit() == eStyleUnit_Auto &&
offsets.GetRightUnit() == eStyleUnit_Auto) ||
(rsFlags & nsHTMLReflowState::STATIC_POS_IS_CB_ORIGIN)) {
r.x += aContainingBlock.x;
}
if (!(offsets.GetTopUnit() == eStyleUnit_Auto &&
offsets.GetBottomUnit() == eStyleUnit_Auto) ||
(rsFlags & nsHTMLReflowState::STATIC_POS_IS_CB_ORIGIN)) {
r.y += aContainingBlock.y;
}
}
aKidFrame->SetRect(r);
nsView* view = aKidFrame->GetView();
if (view) {
// Size and position the view and set its opacity, visibility, content
// transparency, and clip
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
kidDesiredSize.VisualOverflow());
} else {
nsContainerFrame::PositionChildViews(aKidFrame);
}
aKidFrame->DidReflow(aPresContext, &kidReflowState,
nsDidReflowStatus::FINISHED);
#ifdef DEBUG
if (nsBlockFrame::gNoisyReflow) {
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent - 1);
printf("abs pos ");
if (aKidFrame) {
nsAutoString name;
aKidFrame->GetFrameName(name);
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
}
printf("%p rect=%d,%d,%d,%d\n", static_cast<void*>(aKidFrame),
r.x, r.y, r.width, r.height);
}
#endif
if (aOverflowAreas) {
aOverflowAreas->UnionWith(kidDesiredSize.mOverflowAreas + r.TopLeft());
}
}
void
nsRangeFrame::ReflowAnonymousContent(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState)
{
// The width/height of our content box, which is the available width/height
// for our anonymous content:
nscoord rangeFrameContentBoxWidth = aReflowState.ComputedWidth();
nscoord rangeFrameContentBoxHeight = aReflowState.ComputedHeight();
if (rangeFrameContentBoxHeight == NS_AUTOHEIGHT) {
rangeFrameContentBoxHeight = 0;
}
nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
if (trackFrame) { // display:none?
// Position the track:
// The idea here is that we allow content authors to style the width,
// height, border and padding of the track, but we ignore margin and
// positioning properties and do the positioning ourself to keep the center
// of the track's border box on the center of the nsRangeFrame's content
// box.
nsHTMLReflowState trackReflowState(aPresContext, aReflowState, trackFrame,
nsSize(aReflowState.ComputedWidth(),
NS_UNCONSTRAINEDSIZE));
// Find the x/y position of the track frame such that it will be positioned
// as described above. These coordinates are with respect to the
// nsRangeFrame's border-box.
nscoord trackX = rangeFrameContentBoxWidth / 2;
nscoord trackY = rangeFrameContentBoxHeight / 2;
// Account for the track's border and padding (we ignore its margin):
trackX -= trackReflowState.ComputedPhysicalBorderPadding().left +
trackReflowState.ComputedWidth() / 2;
trackY -= trackReflowState.ComputedPhysicalBorderPadding().top +
trackReflowState.ComputedHeight() / 2;
// Make relative to our border box instead of our content box:
trackX += aReflowState.ComputedPhysicalBorderPadding().left;
trackY += aReflowState.ComputedPhysicalBorderPadding().top;
nsReflowStatus frameStatus;
nsHTMLReflowMetrics trackDesiredSize(aReflowState);
ReflowChild(trackFrame, aPresContext, trackDesiredSize,
trackReflowState, trackX, trackY, 0, frameStatus);
MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
"We gave our child unconstrained height, so it should be complete");
FinishReflowChild(trackFrame, aPresContext, trackDesiredSize,
&trackReflowState, trackX, trackY, 0);
}
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
if (thumbFrame) { // display:none?
nsHTMLReflowState thumbReflowState(aPresContext, aReflowState, thumbFrame,
nsSize(aReflowState.ComputedWidth(),
NS_UNCONSTRAINEDSIZE));
// Where we position the thumb depends on its size, so we first reflow
// the thumb at {0,0} to obtain its size, then position it afterwards.
nsReflowStatus frameStatus;
nsHTMLReflowMetrics thumbDesiredSize(aReflowState);
ReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
thumbReflowState, 0, 0, 0, frameStatus);
MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
"We gave our child unconstrained height, so it should be complete");
FinishReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
&thumbReflowState, 0, 0, 0);
DoUpdateThumbPosition(thumbFrame, nsSize(aDesiredSize.Width(),
aDesiredSize.Height()));
}
nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
if (rangeProgressFrame) { // display:none?
nsHTMLReflowState progressReflowState(aPresContext, aReflowState,
rangeProgressFrame,
nsSize(aReflowState.ComputedWidth(),
NS_UNCONSTRAINEDSIZE));
// We first reflow the range-progress frame at {0,0} to obtain its
// unadjusted dimensions, then we adjust it to so that the appropriate edge
// ends at the thumb.
nsReflowStatus frameStatus;
nsHTMLReflowMetrics progressDesiredSize(aReflowState);
ReflowChild(rangeProgressFrame, aPresContext,
progressDesiredSize, progressReflowState, 0, 0,
0, frameStatus);
MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
"We gave our child unconstrained height, so it should be complete");
FinishReflowChild(rangeProgressFrame, aPresContext,
progressDesiredSize, &progressReflowState, 0, 0, 0);
DoUpdateRangeProgressFrame(rangeProgressFrame, nsSize(aDesiredSize.Width(),
aDesiredSize.Height()));
}
}
NS_IMETHODIMP
nsCanvasFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsCanvasFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_FRAME_TRACE_REFLOW_IN("nsCanvasFrame::Reflow");
// Initialize OUT parameter
aStatus = NS_FRAME_COMPLETE;
nsCanvasFrame* prevCanvasFrame = static_cast<nsCanvasFrame*>
(GetPrevInFlow());
if (prevCanvasFrame) {
AutoFrameListPtr overflow(aPresContext,
prevCanvasFrame->StealOverflowFrames());
if (overflow) {
NS_ASSERTION(overflow->OnlyChild(),
"must have doc root as canvas frame's only child");
nsContainerFrame::ReparentFrameViewList(aPresContext, *overflow,
prevCanvasFrame, this);
// Prepend overflow to the our child list. There may already be
// children placeholders for fixed-pos elements, which don't get
// reflowed but must not be lost until the canvas frame is destroyed.
mFrames.InsertFrames(this, nullptr, *overflow);
}
}
// Set our size up front, since some parts of reflow depend on it
// being already set. Note that the computed height may be
// unconstrained; that's ok. Consumers should watch out for that.
SetSize(nsSize(aReflowState.ComputedWidth(), aReflowState.ComputedHeight()));
// Reflow our one and only normal child frame. It's either the root
// element's frame or a placeholder for that frame, if the root element
// is abs-pos or fixed-pos. We may have additional children which
// are placeholders for continuations of fixed-pos content, but those
// don't need to be reflowed. The normal child is always comes before
// the fixed-pos placeholders, because we insert it at the start
// of the child list, above.
nsHTMLReflowMetrics kidDesiredSize(aReflowState.GetWritingMode());
if (mFrames.IsEmpty()) {
// We have no child frame, so return an empty size
aDesiredSize.Width() = aDesiredSize.Height() = 0;
} else {
nsIFrame* kidFrame = mFrames.FirstChild();
bool kidDirty = (kidFrame->GetStateBits() & NS_FRAME_IS_DIRTY) != 0;
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, kidFrame,
nsSize(aReflowState.AvailableWidth(),
aReflowState.AvailableHeight()));
if (aReflowState.mFlags.mVResize &&
(kidFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT)) {
// Tell our kid it's being vertically resized too. Bit of a
// hack for framesets.
kidReflowState.mFlags.mVResize = true;
}
nsPoint kidPt(kidReflowState.ComputedPhysicalMargin().left,
kidReflowState.ComputedPhysicalMargin().top);
kidReflowState.ApplyRelativePositioning(&kidPt);
// Reflow the frame
ReflowChild(kidFrame, aPresContext, kidDesiredSize, kidReflowState,
kidPt.x, kidPt.y, 0, aStatus);
// Complete the reflow and position and size the child frame
FinishReflowChild(kidFrame, aPresContext, &kidReflowState, kidDesiredSize,
kidPt.x, kidPt.y, 0);
if (!NS_FRAME_IS_FULLY_COMPLETE(aStatus)) {
nsIFrame* nextFrame = kidFrame->GetNextInFlow();
NS_ASSERTION(nextFrame || aStatus & NS_FRAME_REFLOW_NEXTINFLOW,
"If it's incomplete and has no nif yet, it must flag a nif reflow.");
if (!nextFrame) {
nextFrame = aPresContext->PresShell()->FrameConstructor()->
CreateContinuingFrame(aPresContext, kidFrame, this);
SetOverflowFrames(aPresContext, nsFrameList(nextFrame, nextFrame));
// Root overflow containers will be normal children of
// the canvas frame, but that's ok because there
// aren't any other frames we need to isolate them from
// during reflow.
}
if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aStatus)) {
nextFrame->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
}
// If the child frame was just inserted, then we're responsible for making sure
// it repaints
if (kidDirty) {
// But we have a new child, which will affect our background, so
// invalidate our whole rect.
// Note: Even though we request to be sized to our child's size, our
// scroll frame ensures that we are always the size of the viewport.
// Also note: GetPosition() on a CanvasFrame is always going to return
// (0, 0). We only want to invalidate GetRect() since Get*OverflowRect()
// could also include overflow to our top and left (out of the viewport)
// which doesn't need to be painted.
nsIFrame* viewport = PresContext()->GetPresShell()->GetRootFrame();
viewport->InvalidateFrame();
}
// Return our desired size. Normally it's what we're told, but
// sometimes we can be given an unconstrained height (when a window
// is sizing-to-content), and we should compute our desired height.
aDesiredSize.Width() = aReflowState.ComputedWidth();
if (aReflowState.ComputedHeight() == NS_UNCONSTRAINEDSIZE) {
aDesiredSize.Height() = kidFrame->GetRect().height +
kidReflowState.ComputedPhysicalMargin().TopBottom();
} else {
aDesiredSize.Height() = aReflowState.ComputedHeight();
}
aDesiredSize.SetOverflowAreasToDesiredBounds();
aDesiredSize.mOverflowAreas.UnionWith(
kidDesiredSize.mOverflowAreas + kidPt);
}
if (prevCanvasFrame) {
ReflowOverflowContainerChildren(aPresContext, aReflowState,
aDesiredSize.mOverflowAreas, 0,
aStatus);
}
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus);
NS_FRAME_TRACE_REFLOW_OUT("nsCanvasFrame::Reflow", aStatus);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
void
nsLeafBoxFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// This is mostly a copy of nsBoxFrame::Reflow().
// We aren't able to share an implementation because of the frame
// class hierarchy. If you make changes here, please keep
// nsBoxFrame::Reflow in sync.
DO_GLOBAL_REFLOW_COUNT("nsLeafBoxFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_ASSERTION(aReflowState.ComputedWidth() >=0 &&
aReflowState.ComputedHeight() >= 0, "Computed Size < 0");
#ifdef DO_NOISY_REFLOW
printf("\n-------------Starting LeafBoxFrame Reflow ----------------------------\n");
printf("%p ** nsLBF::Reflow %d R: ", this, myCounter++);
switch (aReflowState.reason) {
case eReflowReason_Initial:
printf("Ini");break;
case eReflowReason_Incremental:
printf("Inc");break;
case eReflowReason_Resize:
printf("Rsz");break;
case eReflowReason_StyleChange:
printf("Sty");break;
case eReflowReason_Dirty:
printf("Drt ");
break;
default:printf("<unknown>%d", aReflowState.reason);break;
}
printSize("AW", aReflowState.AvailableWidth());
printSize("AH", aReflowState.AvailableHeight());
printSize("CW", aReflowState.ComputedWidth());
printSize("CH", aReflowState.ComputedHeight());
printf(" *\n");
#endif
aStatus = NS_FRAME_COMPLETE;
// create the layout state
nsBoxLayoutState state(aPresContext, aReflowState.rendContext);
nsSize computedSize(aReflowState.ComputedWidth(),aReflowState.ComputedHeight());
nsMargin m;
m = aReflowState.ComputedPhysicalBorderPadding();
//GetBorderAndPadding(m);
// this happens sometimes. So lets handle it gracefully.
if (aReflowState.ComputedHeight() == 0) {
nsSize minSize = GetMinSize(state);
computedSize.height = minSize.height - m.top - m.bottom;
}
nsSize prefSize(0,0);
// if we are told to layout intrinic then get our preferred size.
if (computedSize.width == NS_INTRINSICSIZE || computedSize.height == NS_INTRINSICSIZE) {
prefSize = GetPrefSize(state);
nsSize minSize = GetMinSize(state);
nsSize maxSize = GetMaxSize(state);
prefSize = BoundsCheck(minSize, prefSize, maxSize);
}
// get our desiredSize
if (aReflowState.ComputedWidth() == NS_INTRINSICSIZE) {
computedSize.width = prefSize.width;
} else {
computedSize.width += m.left + m.right;
}
if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) {
computedSize.height = prefSize.height;
} else {
computedSize.height += m.top + m.bottom;
}
// handle reflow state min and max sizes
// XXXbz the width handling here seems to be wrong, since
// mComputedMin/MaxWidth is a content-box size, whole
// computedSize.width is a border-box size...
if (computedSize.width > aReflowState.ComputedMaxWidth())
computedSize.width = aReflowState.ComputedMaxWidth();
if (computedSize.width < aReflowState.ComputedMinWidth())
computedSize.width = aReflowState.ComputedMinWidth();
// Now adjust computedSize.height for our min and max computed
// height. The only problem is that those are content-box sizes,
// while computedSize.height is a border-box size. So subtract off
// m.TopBottom() before adjusting, then readd it.
computedSize.height = std::max(0, computedSize.height - m.TopBottom());
computedSize.height = NS_CSS_MINMAX(computedSize.height,
aReflowState.ComputedMinHeight(),
aReflowState.ComputedMaxHeight());
computedSize.height += m.TopBottom();
nsRect r(mRect.x, mRect.y, computedSize.width, computedSize.height);
SetBounds(state, r);
// layout our children
Layout(state);
// ok our child could have gotten bigger. So lets get its bounds
aDesiredSize.Width() = mRect.width;
aDesiredSize.Height() = mRect.height;
aDesiredSize.SetTopAscent(GetBoxAscent(state));
// the overflow rect is set in SetBounds() above
aDesiredSize.mOverflowAreas = GetOverflowAreas();
#ifdef DO_NOISY_REFLOW
{
printf("%p ** nsLBF(done) W:%d H:%d ", this, aDesiredSize.Width(), aDesiredSize.Height());
if (maxElementWidth) {
printf("MW:%d\n", *maxElementWidth);
} else {
printf("MW:?\n");
}
}
#endif
}
nsresult
nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame* aDelegatingFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nscoord aContainingBlockWidth,
nscoord aContainingBlockHeight,
PRBool aConstrainHeight,
nsIFrame* aKidFrame,
nsReflowStatus& aStatus,
nsOverflowAreas* aOverflowAreas)
{
#ifdef DEBUG
if (nsBlockFrame::gNoisyReflow) {
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
printf("abs pos ");
if (aKidFrame) {
nsAutoString name;
aKidFrame->GetFrameName(name);
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
}
char width[16];
char height[16];
PrettyUC(aReflowState.availableWidth, width);
PrettyUC(aReflowState.availableHeight, height);
printf(" a=%s,%s ", width, height);
PrettyUC(aReflowState.ComputedWidth(), width);
PrettyUC(aReflowState.ComputedHeight(), height);
printf("c=%s,%s \n", width, height);
}
AutoNoisyIndenter indent(nsBlockFrame::gNoisy);
#endif // DEBUG
// Store position and overflow rect so taht we can invalidate the correct
// area if the position changes
nsRect oldOverflowRect(aKidFrame->GetVisualOverflowRect() +
aKidFrame->GetPosition());
nsRect oldRect = aKidFrame->GetRect();
nsresult rv;
// Get the border values
const nsMargin& border = aReflowState.mStyleBorder->GetActualBorder();
nscoord availWidth = aContainingBlockWidth;
if (availWidth == -1) {
NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
"Must have a useful width _somewhere_");
availWidth =
aReflowState.ComputedWidth() + aReflowState.mComputedPadding.LeftRight();
}
nsHTMLReflowMetrics kidDesiredSize;
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
nsSize(availWidth, NS_UNCONSTRAINEDSIZE),
aContainingBlockWidth,
aContainingBlockHeight);
// Send the WillReflow() notification and position the frame
aKidFrame->WillReflow(aPresContext);
PRBool constrainHeight = (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE)
&& aConstrainHeight
// Don't split if told not to (e.g. for fixed frames)
&& (aDelegatingFrame->GetType() != nsGkAtoms::positionedInlineFrame)
//XXX we don't handle splitting frames for inline absolute containing blocks yet
&& (aKidFrame->GetRect().y <= aReflowState.availableHeight);
// Don't split things below the fold. (Ideally we shouldn't *have*
// anything totally below the fold, but we can't position frames
// across next-in-flow breaks yet.
if (constrainHeight) {
kidReflowState.availableHeight = aReflowState.availableHeight - border.top
- kidReflowState.mComputedMargin.top;
if (NS_AUTOOFFSET != kidReflowState.mComputedOffsets.top)
kidReflowState.availableHeight -= kidReflowState.mComputedOffsets.top;
}
// Do the reflow
rv = aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowState, aStatus);
// If we're solving for 'left' or 'top', then compute it now that we know the
// width/height
if ((NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) ||
(NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top)) {
if (-1 == aContainingBlockWidth) {
// Get the containing block width/height
kidReflowState.ComputeContainingBlockRectangle(aPresContext,
&aReflowState,
aContainingBlockWidth,
aContainingBlockHeight);
}
if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) {
NS_ASSERTION(NS_AUTOOFFSET != kidReflowState.mComputedOffsets.right,
"Can't solve for both left and right");
kidReflowState.mComputedOffsets.left = aContainingBlockWidth -
kidReflowState.mComputedOffsets.right -
kidReflowState.mComputedMargin.right -
kidDesiredSize.width -
kidReflowState.mComputedMargin.left;
}
if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top) {
kidReflowState.mComputedOffsets.top = aContainingBlockHeight -
kidReflowState.mComputedOffsets.bottom -
kidReflowState.mComputedMargin.bottom -
kidDesiredSize.height -
kidReflowState.mComputedMargin.top;
}
}
// Position the child relative to our padding edge
nsRect rect(border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left,
border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top,
kidDesiredSize.width, kidDesiredSize.height);
aKidFrame->SetRect(rect);
nsIView* view = aKidFrame->GetView();
if (view) {
// Size and position the view and set its opacity, visibility, content
// transparency, and clip
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
kidDesiredSize.VisualOverflow());
} else {
nsContainerFrame::PositionChildViews(aKidFrame);
}
if (oldRect.TopLeft() != rect.TopLeft() ||
(aDelegatingFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
// The frame moved
aKidFrame->GetParent()->Invalidate(oldOverflowRect);
aKidFrame->InvalidateFrameSubtree();
} else if (oldRect.Size() != rect.Size()) {
// Invalidate the area where the frame changed size.
nscoord innerWidth = NS_MIN(oldRect.width, rect.width);
nscoord innerHeight = NS_MIN(oldRect.height, rect.height);
nscoord outerWidth = NS_MAX(oldRect.width, rect.width);
nscoord outerHeight = NS_MAX(oldRect.height, rect.height);
aKidFrame->GetParent()->Invalidate(
nsRect(rect.x + innerWidth, rect.y, outerWidth - innerWidth, outerHeight));
// Invalidate the horizontal strip
aKidFrame->GetParent()->Invalidate(
nsRect(rect.x, rect.y + innerHeight, outerWidth, outerHeight - innerHeight));
}
aKidFrame->DidReflow(aPresContext, &kidReflowState, NS_FRAME_REFLOW_FINISHED);
#ifdef DEBUG
if (nsBlockFrame::gNoisyReflow) {
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent - 1);
printf("abs pos ");
if (aKidFrame) {
nsAutoString name;
aKidFrame->GetFrameName(name);
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
}
printf("%p rect=%d,%d,%d,%d\n", static_cast<void*>(aKidFrame),
rect.x, rect.y, rect.width, rect.height);
}
#endif
if (aOverflowAreas) {
aOverflowAreas->UnionWith(kidDesiredSize.mOverflowAreas + rect.TopLeft());
}
return rv;
}
NS_IMETHODIMP
nsVideoFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsVideoFrame::Reflow: availSize=%d,%d",
aReflowState.availableWidth, aReflowState.availableHeight));
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
aStatus = NS_FRAME_COMPLETE;
aMetrics.width = aReflowState.ComputedWidth();
aMetrics.height = aReflowState.ComputedHeight();
// stash this away so we can compute our inner area later
mBorderPadding = aReflowState.mComputedBorderPadding;
aMetrics.width += mBorderPadding.left + mBorderPadding.right;
aMetrics.height += mBorderPadding.top + mBorderPadding.bottom;
// Reflow the child frames. We may have up to two, an image frame
// which is the poster, and a box frame, which is the video controls.
for (nsIFrame *child = mFrames.FirstChild();
child;
child = child->GetNextSibling()) {
if (child->GetContent() == mPosterImage) {
// Reflow the poster frame.
nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
nsHTMLReflowMetrics kidDesiredSize;
nsSize availableSize = nsSize(aReflowState.availableWidth,
aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext,
aReflowState,
imageFrame,
availableSize,
aMetrics.width,
aMetrics.height);
uint32_t posterHeight, posterWidth;
nsSize scaledPosterSize(0, 0);
nsSize computedArea(aReflowState.ComputedWidth(), aReflowState.ComputedHeight());
nsPoint posterTopLeft(0, 0);
nsCOMPtr<nsIDOMHTMLImageElement> posterImage = do_QueryInterface(mPosterImage);
NS_ENSURE_TRUE(posterImage, NS_ERROR_FAILURE);
posterImage->GetNaturalHeight(&posterHeight);
posterImage->GetNaturalWidth(&posterWidth);
if (ShouldDisplayPoster() && posterHeight && posterWidth) {
gfxFloat scale =
std::min(static_cast<float>(computedArea.width)/nsPresContext::CSSPixelsToAppUnits(static_cast<float>(posterWidth)),
static_cast<float>(computedArea.height)/nsPresContext::CSSPixelsToAppUnits(static_cast<float>(posterHeight)));
gfxSize scaledRatio = gfxSize(scale*posterWidth, scale*posterHeight);
scaledPosterSize.width = nsPresContext::CSSPixelsToAppUnits(static_cast<float>(scaledRatio.width));
scaledPosterSize.height = nsPresContext::CSSPixelsToAppUnits(static_cast<int32_t>(scaledRatio.height));
}
kidReflowState.SetComputedWidth(scaledPosterSize.width);
kidReflowState.SetComputedHeight(scaledPosterSize.height);
posterTopLeft.x = ((computedArea.width - scaledPosterSize.width) / 2) + mBorderPadding.left;
posterTopLeft.y = ((computedArea.height - scaledPosterSize.height) / 2) + mBorderPadding.top;
ReflowChild(imageFrame, aPresContext, kidDesiredSize, kidReflowState,
posterTopLeft.x, posterTopLeft.y, 0, aStatus);
FinishReflowChild(imageFrame, aPresContext, &kidReflowState, kidDesiredSize,
posterTopLeft.x, posterTopLeft.y, 0);
} else if (child->GetContent() == mVideoControls) {
// Reflow the video controls frame.
nsBoxLayoutState boxState(PresContext(), aReflowState.rendContext);
nsSize size = child->GetSize();
nsBoxFrame::LayoutChildAt(boxState,
child,
nsRect(mBorderPadding.left,
mBorderPadding.top,
aReflowState.ComputedWidth(),
aReflowState.ComputedHeight()));
if (child->GetSize() != size) {
nsRefPtr<nsRunnable> event = new DispatchResizeToControls(child->GetContent());
nsContentUtils::AddScriptRunner(event);
}
} else if (child->GetContent() == mCaptionDiv) {
// Reflow to caption div
nsHTMLReflowMetrics kidDesiredSize;
nsSize availableSize = nsSize(aReflowState.availableWidth,
aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext,
aReflowState,
child,
availableSize,
aMetrics.width,
aMetrics.height);
nsSize size(aReflowState.ComputedWidth(), aReflowState.ComputedHeight());
size.width -= kidReflowState.mComputedBorderPadding.LeftRight();
size.height -= kidReflowState.mComputedBorderPadding.TopBottom();
kidReflowState.SetComputedWidth(std::max(size.width, 0));
kidReflowState.SetComputedHeight(std::max(size.height, 0));
ReflowChild(child, aPresContext, kidDesiredSize, kidReflowState,
mBorderPadding.left, mBorderPadding.top, 0, aStatus);
FinishReflowChild(child, aPresContext,
&kidReflowState, kidDesiredSize,
mBorderPadding.left, mBorderPadding.top, 0);
}
}
aMetrics.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aMetrics);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsVideoFrame::Reflow: size=%d,%d",
aMetrics.width, aMetrics.height));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
return NS_OK;
}
NS_IMETHODIMP
nsPageContentFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsPageContentFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
nsresult rv = NS_OK;
if (GetPrevInFlow() && (GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
nsresult rv = aPresContext->PresShell()->FrameConstructor()
->ReplicateFixedFrames(this);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set our size up front, since some parts of reflow depend on it
// being already set. Note that the computed height may be
// unconstrained; that's ok. Consumers should watch out for that.
nsSize maxSize(aReflowState.ComputedWidth(),
aReflowState.ComputedHeight());
SetSize(maxSize);
// A PageContentFrame must always have one child: the canvas frame.
// Resize our frame allowing it only to be as big as we are
// XXX Pay attention to the page's border and padding...
if (mFrames.NotEmpty()) {
nsIFrame* frame = mFrames.FirstChild();
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
kidReflowState.SetComputedHeight(maxSize.height);
mPD->mPageContentSize = maxSize.width;
// Reflow the page content area
rv = ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
NS_ENSURE_SUCCESS(rv, rv);
// The document element's background should cover the entire canvas, so
// take into account the combined area and any space taken up by
// absolutely positioned elements
nsMargin padding(0,0,0,0);
// XXXbz this screws up percentage padding (sets padding to zero
// in the percentage padding case)
kidReflowState.mStylePadding->GetPadding(padding);
// This is for shrink-to-fit, and therefore we want to use the
// scrollable overflow, since the purpose of shrink to fit is to
// make the content that ought to be reachable (represented by the
// scrollable overflow) fit in the page.
if (frame->HasOverflowAreas()) {
// The background covers the content area and padding area, so check
// for children sticking outside the child frame's padding edge
nscoord xmost = aDesiredSize.ScrollableOverflow().XMost();
if (xmost > aDesiredSize.Width()) {
mPD->mPageContentXMost =
xmost +
kidReflowState.mStyleBorder->GetComputedBorderWidth(NS_SIDE_RIGHT) +
padding.right;
}
}
// Place and size the child
FinishReflowChild(frame, aPresContext, aDesiredSize, &kidReflowState, 0, 0, 0);
NS_ASSERTION(aPresContext->IsDynamic() || !NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
!frame->GetNextInFlow(), "bad child flow list");
}
// Reflow our fixed frames
nsReflowStatus fixedStatus = NS_FRAME_COMPLETE;
ReflowAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, fixedStatus);
NS_ASSERTION(NS_FRAME_IS_COMPLETE(fixedStatus), "fixed frames can be truncated, but not incomplete");
// Return our desired size
aDesiredSize.Width() = aReflowState.ComputedWidth();
if (aReflowState.ComputedHeight() != NS_UNCONSTRAINEDSIZE) {
aDesiredSize.Height() = aReflowState.ComputedHeight();
}
FinishAndStoreOverflow(&aDesiredSize);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
void
nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aButtonDesiredSize,
const nsHTMLReflowState& aButtonReflowState,
nsIFrame* aFirstKid)
{
// Buttons have some bonus renderer-determined border/padding,
// which occupies part of the button's content-box area:
const nsMargin focusPadding = mRenderer.GetAddedButtonBorderAndPadding();
WritingMode wm = aFirstKid->GetWritingMode();
LogicalSize availSize = aButtonReflowState.ComputedSize(GetWritingMode());
availSize.BSize(wm) = NS_INTRINSICSIZE;
// Indent the child inside us by the focus border. We must do this separate
// from the regular border.
availSize.ISize(wm) -= LogicalMargin(wm, focusPadding).IStartEnd(wm);
// See whether out availSize's width is big enough. If it's smaller than our
// intrinsic min width, that means that the kid wouldn't really fit; for a
// better look in such cases we adjust the available width and our left
// offset to allow the kid to spill left into our padding.
nscoord xoffset = focusPadding.left +
aButtonReflowState.ComputedPhysicalBorderPadding().left;
nscoord extrawidth = GetMinISize(aButtonReflowState.rendContext) -
aButtonReflowState.ComputedWidth();
if (extrawidth > 0) {
nscoord extraleft = extrawidth / 2;
nscoord extraright = extrawidth - extraleft;
NS_ASSERTION(extraright >=0, "How'd that happen?");
// Do not allow the extras to be bigger than the relevant padding
extraleft = std::min(extraleft, aButtonReflowState.ComputedPhysicalPadding().left);
extraright = std::min(extraright, aButtonReflowState.ComputedPhysicalPadding().right);
xoffset -= extraleft;
availSize.Width(wm) = availSize.Width(wm) + extraleft + extraright;
}
availSize.Width(wm) = std::max(availSize.Width(wm), 0);
// Give child a clone of the button's reflow state, with height/width reduced
// by focusPadding, so that descendants with height:100% don't protrude.
nsHTMLReflowState adjustedButtonReflowState =
CloneReflowStateWithReducedContentBox(aButtonReflowState, focusPadding);
nsHTMLReflowState contentsReflowState(aPresContext,
adjustedButtonReflowState,
aFirstKid, availSize);
nsReflowStatus contentsReflowStatus;
nsHTMLReflowMetrics contentsDesiredSize(aButtonReflowState);
ReflowChild(aFirstKid, aPresContext,
contentsDesiredSize, contentsReflowState,
xoffset,
focusPadding.top + aButtonReflowState.ComputedPhysicalBorderPadding().top,
0, contentsReflowStatus);
MOZ_ASSERT(NS_FRAME_IS_COMPLETE(contentsReflowStatus),
"We gave button-contents frame unconstrained available height, "
"so it should be complete");
// Compute the button's content-box height:
nscoord buttonContentBoxHeight = 0;
if (aButtonReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
// Button has a fixed height -- that's its content-box height.
buttonContentBoxHeight = aButtonReflowState.ComputedHeight();
} else {
// Button is intrinsically sized -- it should shrinkwrap the
// button-contents' height, plus any focus-padding space:
buttonContentBoxHeight =
contentsDesiredSize.Height() + focusPadding.TopBottom();
// Make sure we obey min/max-height in the case when we're doing intrinsic
// sizing (we get it for free when we have a non-intrinsic
// aButtonReflowState.ComputedHeight()). Note that we do this before
// adjusting for borderpadding, since mComputedMaxHeight and
// mComputedMinHeight are content heights.
buttonContentBoxHeight =
NS_CSS_MINMAX(buttonContentBoxHeight,
aButtonReflowState.ComputedMinHeight(),
aButtonReflowState.ComputedMaxHeight());
}
// Center child vertically in the button
// (technically, inside of the button's focus-padding area)
nscoord extraSpace =
buttonContentBoxHeight - focusPadding.TopBottom() -
contentsDesiredSize.Height();
nscoord yoffset = std::max(0, extraSpace / 2);
// Adjust yoffset to be in terms of the button's frame-rect, instead of
// its focus-padding rect:
yoffset += focusPadding.top + aButtonReflowState.ComputedPhysicalBorderPadding().top;
// Place the child
FinishReflowChild(aFirstKid, aPresContext,
contentsDesiredSize, &contentsReflowState,
xoffset, yoffset, 0);
// Make sure we have a useful 'ascent' value for the child
if (contentsDesiredSize.BlockStartAscent() ==
nsHTMLReflowMetrics::ASK_FOR_BASELINE) {
WritingMode wm = aButtonReflowState.GetWritingMode();
contentsDesiredSize.SetBlockStartAscent(aFirstKid->GetLogicalBaseline(wm));
}
// OK, we're done with the child frame.
// Use what we learned to populate the button frame's reflow metrics.
// * Button's height & width are content-box size + border-box contribution:
aButtonDesiredSize.Width() = aButtonReflowState.ComputedWidth() +
aButtonReflowState.ComputedPhysicalBorderPadding().LeftRight();
aButtonDesiredSize.Height() = buttonContentBoxHeight +
aButtonReflowState.ComputedPhysicalBorderPadding().TopBottom();
// * Button's ascent is its child's ascent, plus the child's y-offset
// within our frame:
aButtonDesiredSize.SetBlockStartAscent(contentsDesiredSize.BlockStartAscent() +
yoffset);
aButtonDesiredSize.SetOverflowAreasToDesiredBounds();
}
NS_IMETHODIMP
nsColumnSetFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Don't support interruption in columns
nsPresContext::InterruptPreventer noInterrupts(aPresContext);
DO_GLOBAL_REFLOW_COUNT("nsColumnSetFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
// Initialize OUT parameter
aStatus = NS_FRAME_COMPLETE;
// Our children depend on our height if we have a fixed height.
if (aReflowState.ComputedHeight() != NS_AUTOHEIGHT) {
NS_ASSERTION(aReflowState.ComputedHeight() != NS_INTRINSICSIZE,
"Unexpected mComputedHeight");
AddStateBits(NS_FRAME_CONTAINS_RELATIVE_HEIGHT);
}
else {
RemoveStateBits(NS_FRAME_CONTAINS_RELATIVE_HEIGHT);
}
//------------ Handle Incremental Reflow -----------------
ReflowConfig config = ChooseColumnStrategy(aReflowState);
bool isBalancing = config.mBalanceColCount < PR_INT32_MAX;
// If balancing, then we allow the last column to grow to unbounded
// height during the first reflow. This gives us a way to estimate
// what the average column height should be, because we can measure
// the heights of all the columns and sum them up. But don't do this
// if we have a next in flow because we don't want to suck all its
// content back here and then have to push it out again!
nsIFrame* nextInFlow = GetNextInFlow();
bool unboundedLastColumn = isBalancing && !nextInFlow;
nsCollapsingMargin carriedOutBottomMargin;
ColumnBalanceData colData;
bool feasible = ReflowChildren(aDesiredSize, aReflowState,
aStatus, config, unboundedLastColumn, &carriedOutBottomMargin, colData);
if (isBalancing && !aPresContext->HasPendingInterrupt()) {
nscoord availableContentHeight = GetAvailableContentHeight(aReflowState);
// Termination of the algorithm below is guaranteed because
// knownFeasibleHeight - knownInfeasibleHeight decreases in every
// iteration.
nscoord knownFeasibleHeight = NS_INTRINSICSIZE;
nscoord knownInfeasibleHeight = 0;
// We set this flag when we detect that we may contain a frame
// that can break anywhere (thus foiling the linear decrease-by-one
// search)
bool maybeContinuousBreakingDetected = false;
while (!aPresContext->HasPendingInterrupt()) {
nscoord lastKnownFeasibleHeight = knownFeasibleHeight;
// Record what we learned from the last reflow
if (feasible) {
// maxHeight is feasible. Also, mLastBalanceHeight is feasible.
knownFeasibleHeight = NS_MIN(knownFeasibleHeight, colData.mMaxHeight);
knownFeasibleHeight = NS_MIN(knownFeasibleHeight, mLastBalanceHeight);
// Furthermore, no height less than the height of the last
// column can ever be feasible. (We might be able to reduce the
// height of a non-last column by moving content to a later column,
// but we can't do that with the last column.)
if (mFrames.GetLength() == config.mBalanceColCount) {
knownInfeasibleHeight = NS_MAX(knownInfeasibleHeight,
colData.mLastHeight - 1);
}
} else {
knownInfeasibleHeight = NS_MAX(knownInfeasibleHeight, mLastBalanceHeight);
// If a column didn't fit in its available height, then its current
// height must be the minimum height for unbreakable content in
// the column, and therefore no smaller height can be feasible.
knownInfeasibleHeight = NS_MAX(knownInfeasibleHeight,
colData.mMaxOverflowingHeight - 1);
if (unboundedLastColumn) {
// The last column is unbounded, so all content got reflowed, so the
// mColMaxHeight is feasible.
knownFeasibleHeight = NS_MIN(knownFeasibleHeight,
colData.mMaxHeight);
}
}
#ifdef DEBUG_roc
printf("*** nsColumnSetFrame::Reflow balancing knownInfeasible=%d knownFeasible=%d\n",
knownInfeasibleHeight, knownFeasibleHeight);
#endif
if (knownInfeasibleHeight >= knownFeasibleHeight - 1) {
// knownFeasibleHeight is where we want to be
break;
}
if (knownInfeasibleHeight >= availableContentHeight) {
break;
}
if (lastKnownFeasibleHeight - knownFeasibleHeight == 1) {
// We decreased the feasible height by one twip only. This could
// indicate that there is a continuously breakable child frame
// that we are crawling through.
maybeContinuousBreakingDetected = true;
}
nscoord nextGuess = (knownFeasibleHeight + knownInfeasibleHeight)/2;
// The constant of 600 twips is arbitrary. It's about two line-heights.
if (knownFeasibleHeight - nextGuess < 600 &&
!maybeContinuousBreakingDetected) {
// We're close to our target, so just try shrinking just the
// minimum amount that will cause one of our columns to break
// differently.
nextGuess = knownFeasibleHeight - 1;
} else if (unboundedLastColumn) {
// Make a guess by dividing that into N columns. Add some slop
// to try to make it on the feasible side. The constant of
// 600 twips is arbitrary. It's about two line-heights.
nextGuess = colData.mSumHeight/config.mBalanceColCount + 600;
// Sanitize it
nextGuess = clamped(nextGuess, knownInfeasibleHeight + 1,
knownFeasibleHeight - 1);
} else if (knownFeasibleHeight == NS_INTRINSICSIZE) {
// This can happen when we had a next-in-flow so we didn't
// want to do an unbounded height measuring step. Let's just increase
// from the infeasible height by some reasonable amount.
nextGuess = knownInfeasibleHeight*2 + 600;
}
// Don't bother guessing more than our height constraint.
nextGuess = NS_MIN(availableContentHeight, nextGuess);
#ifdef DEBUG_roc
printf("*** nsColumnSetFrame::Reflow balancing choosing next guess=%d\n", nextGuess);
#endif
config.mColMaxHeight = nextGuess;
unboundedLastColumn = false;
AddStateBits(NS_FRAME_IS_DIRTY);
feasible = ReflowChildren(aDesiredSize, aReflowState,
aStatus, config, false,
&carriedOutBottomMargin, colData);
}
if (!feasible && !aPresContext->HasPendingInterrupt()) {
// We may need to reflow one more time at the feasible height to
// get a valid layout.
bool skip = false;
if (knownInfeasibleHeight >= availableContentHeight) {
config.mColMaxHeight = availableContentHeight;
if (mLastBalanceHeight == availableContentHeight) {
skip = true;
}
} else {
config.mColMaxHeight = knownFeasibleHeight;
}
if (!skip) {
// If our height is unconstrained, make sure that the last column is
// allowed to have arbitrary height here, even though we were balancing.
// Otherwise we'd have to split, and it's not clear what we'd do with
// that.
AddStateBits(NS_FRAME_IS_DIRTY);
ReflowChildren(aDesiredSize, aReflowState, aStatus, config,
availableContentHeight == NS_UNCONSTRAINEDSIZE,
&carriedOutBottomMargin, colData);
}
}
}
if (aPresContext->HasPendingInterrupt() &&
aReflowState.availableHeight == NS_UNCONSTRAINEDSIZE) {
// In this situation, we might be lying about our reflow status, because
// our last kid (the one that got interrupted) was incomplete. Fix that.
aStatus = NS_FRAME_COMPLETE;
}
CheckInvalidateSizeChange(aDesiredSize);
// XXXjwir3: This call should be replaced with FinishWithAbsoluteFrames
// when bug 724978 is fixed and nsColumnSetFrame is a full absolute
// container.
FinishAndStoreOverflow(&aDesiredSize);
aDesiredSize.mCarriedOutBottomMargin = carriedOutBottomMargin;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
NS_ASSERTION(NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE,
"Column set should be complete if the available height is unconstrained");
return NS_OK;
}
void
ViewportFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("ViewportFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_FRAME_TRACE_REFLOW_IN("ViewportFrame::Reflow");
// Initialize OUT parameters
aStatus = NS_FRAME_COMPLETE;
// Because |Reflow| sets ComputedBSize() on the child to our
// ComputedBSize().
AddStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE);
// Set our size up front, since some parts of reflow depend on it
// being already set. Note that the computed height may be
// unconstrained; that's ok. Consumers should watch out for that.
SetSize(nsSize(aReflowState.ComputedWidth(), aReflowState.ComputedHeight()));
// Reflow the main content first so that the placeholders of the
// fixed-position frames will be in the right places on an initial
// reflow.
nscoord kidBSize = 0;
WritingMode wm = aReflowState.GetWritingMode();
if (mFrames.NotEmpty()) {
// Deal with a non-incremental reflow or an incremental reflow
// targeted at our one-and-only principal child frame.
if (aReflowState.ShouldReflowAllKids() ||
aReflowState.IsVResize() ||
NS_SUBTREE_DIRTY(mFrames.FirstChild())) {
// Reflow our one-and-only principal child frame
nsIFrame* kidFrame = mFrames.FirstChild();
nsHTMLReflowMetrics kidDesiredSize(aReflowState);
WritingMode wm = kidFrame->GetWritingMode();
LogicalSize availableSpace = aReflowState.AvailableSize(wm);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
kidFrame, availableSpace);
// Reflow the frame
kidReflowState.SetComputedBSize(aReflowState.ComputedBSize());
ReflowChild(kidFrame, aPresContext, kidDesiredSize, kidReflowState,
0, 0, 0, aStatus);
kidBSize = kidDesiredSize.BSize(wm);
FinishReflowChild(kidFrame, aPresContext, kidDesiredSize, nullptr, 0, 0, 0);
} else {
kidBSize = LogicalSize(wm, mFrames.FirstChild()->GetSize()).BSize(wm);
}
}
NS_ASSERTION(aReflowState.AvailableISize() != NS_UNCONSTRAINEDSIZE,
"shouldn't happen anymore");
// Return the max size as our desired size
LogicalSize maxSize(wm, aReflowState.AvailableISize(),
// Being flowed initially at an unconstrained block size
// means we should return our child's intrinsic size.
aReflowState.ComputedBSize() != NS_UNCONSTRAINEDSIZE
? aReflowState.ComputedBSize()
: kidBSize);
aDesiredSize.SetSize(wm, maxSize);
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (HasAbsolutelyPositionedChildren()) {
// Make a copy of the reflow state and change the computed width and height
// to reflect the available space for the fixed items
nsHTMLReflowState reflowState(aReflowState);
if (reflowState.AvailableBSize() == NS_UNCONSTRAINEDSIZE) {
// We have an intrinsic-height document with abs-pos/fixed-pos children.
// Set the available height and mComputedHeight to our chosen height.
reflowState.AvailableBSize() = maxSize.BSize(wm);
// Not having border/padding simplifies things
NS_ASSERTION(reflowState.ComputedPhysicalBorderPadding() == nsMargin(0,0,0,0),
"Viewports can't have border/padding");
reflowState.SetComputedBSize(maxSize.BSize(wm));
}
nsRect rect = AdjustReflowStateAsContainingBlock(&reflowState);
nsOverflowAreas* overflowAreas = &aDesiredSize.mOverflowAreas;
nsIScrollableFrame* rootScrollFrame =
aPresContext->PresShell()->GetRootScrollFrameAsScrollable();
if (rootScrollFrame && !rootScrollFrame->IsIgnoringViewportClipping()) {
overflowAreas = nullptr;
}
AbsPosReflowFlags flags =
AbsPosReflowFlags::eCBWidthAndHeightChanged; // XXX could be optimized
GetAbsoluteContainingBlock()->Reflow(this, aPresContext, reflowState, aStatus,
rect, flags, overflowAreas);
}
if (mFrames.NotEmpty()) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, mFrames.FirstChild());
}
// If we were dirty then do a repaint
if (GetStateBits() & NS_FRAME_IS_DIRTY) {
InvalidateFrame();
}
// Clipping is handled by the document container (e.g., nsSubDocumentFrame),
// so we don't need to change our overflow areas.
bool overflowChanged = FinishAndStoreOverflow(&aDesiredSize);
if (overflowChanged) {
// We may need to alert our container to get it to pick up the
// overflow change.
nsSubDocumentFrame* container = static_cast<nsSubDocumentFrame*>
(nsLayoutUtils::GetCrossDocParentFrame(this));
if (container && !container->ShouldClipSubdocument()) {
container->PresContext()->PresShell()->
FrameNeedsReflow(container, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);
}
}
NS_FRAME_TRACE_REFLOW_OUT("ViewportFrame::Reflow", aStatus);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
bool
nsBlockReflowContext::ComputeCollapsedTopMargin(const nsHTMLReflowState& aRS,
nsCollapsingMargin* aMargin, nsIFrame* aClearanceFrame,
bool* aMayNeedRetry, bool* aBlockIsEmpty)
{
// Include frame's top margin
aMargin->Include(aRS.mComputedMargin.top);
// The inclusion of the bottom margin when empty is done by the caller
// since it doesn't need to be done by the top-level (non-recursive)
// caller.
#ifdef NOISY_VERTICAL_MARGINS
nsFrame::ListTag(stdout, aRS.frame);
printf(": %d => %d\n", aRS.mComputedMargin.top, aMargin->get());
#endif
bool dirtiedLine = false;
bool setBlockIsEmpty = false;
// Calculate the frame's generational top-margin from its child
// blocks. Note that if the frame has a non-zero top-border or
// top-padding then this step is skipped because it will be a margin
// root. It is also skipped if the frame is a margin root for other
// reasons.
nsIFrame* frame = DescendIntoBlockLevelFrame(aRS.frame);
nsPresContext* prescontext = frame->PresContext();
nsBlockFrame* block = nsnull;
if (0 == aRS.mComputedBorderPadding.top) {
block = nsLayoutUtils::GetAsBlock(frame);
if (block) {
bool topMarginRoot, unused;
block->IsMarginRoot(&topMarginRoot, &unused);
if (topMarginRoot) {
block = nsnull;
}
}
}
// iterate not just through the lines of 'block' but also its
// overflow lines and the normal and overflow lines of its next in
// flows. Note that this will traverse some frames more than once:
// for example, if A contains B and A->nextinflow contains
// B->nextinflow, we'll traverse B->nextinflow twice. But this is
// OK because our traversal is idempotent.
for ( ;block; block = static_cast<nsBlockFrame*>(block->GetNextInFlow())) {
for (PRIntn overflowLines = false; overflowLines <= true; ++overflowLines) {
nsBlockFrame::line_iterator line;
nsBlockFrame::line_iterator line_end;
bool anyLines = true;
if (overflowLines) {
nsBlockFrame::FrameLines* frames = block->GetOverflowLines();
nsLineList* lines = frames ? &frames->mLines : nsnull;
if (!lines) {
anyLines = false;
} else {
line = lines->begin();
line_end = lines->end();
}
} else {
line = block->begin_lines();
line_end = block->end_lines();
}
for (; anyLines && line != line_end; ++line) {
if (!aClearanceFrame && line->HasClearance()) {
// If we don't have a clearance frame, then we're computing
// the collapsed margin in the first pass, assuming that all
// lines have no clearance. So clear their clearance flags.
line->ClearHasClearance();
line->MarkDirty();
dirtiedLine = true;
}
bool isEmpty;
if (line->IsInline()) {
isEmpty = line->IsEmpty();
} else {
nsIFrame* kid = line->mFirstChild;
if (kid == aClearanceFrame) {
line->SetHasClearance();
line->MarkDirty();
dirtiedLine = true;
goto done;
}
// Here is where we recur. Now that we have determined that a
// generational collapse is required we need to compute the
// child blocks margin and so in so that we can look into
// it. For its margins to be computed we need to have a reflow
// state for it.
// We may have to construct an extra reflow state here if
// we drilled down through a block wrapper. At the moment
// we can only drill down one level so we only have to support
// one extra reflow state.
const nsHTMLReflowState* outerReflowState = &aRS;
if (frame != aRS.frame) {
NS_ASSERTION(frame->GetParent() == aRS.frame,
"Can only drill through one level of block wrapper");
nsSize availSpace(aRS.ComputedWidth(), aRS.ComputedHeight());
outerReflowState = new nsHTMLReflowState(prescontext,
aRS, frame, availSpace);
}
{
nsSize availSpace(outerReflowState->ComputedWidth(),
outerReflowState->ComputedHeight());
nsHTMLReflowState innerReflowState(prescontext,
*outerReflowState, kid,
availSpace);
// Record that we're being optimistic by assuming the kid
// has no clearance
if (kid->GetStyleDisplay()->mBreakType != NS_STYLE_CLEAR_NONE) {
*aMayNeedRetry = true;
}
if (ComputeCollapsedTopMargin(innerReflowState, aMargin, aClearanceFrame, aMayNeedRetry, &isEmpty)) {
line->MarkDirty();
dirtiedLine = true;
}
if (isEmpty)
aMargin->Include(innerReflowState.mComputedMargin.bottom);
}
if (outerReflowState != &aRS) {
delete const_cast<nsHTMLReflowState*>(outerReflowState);
}
}
if (!isEmpty) {
if (!setBlockIsEmpty && aBlockIsEmpty) {
setBlockIsEmpty = true;
*aBlockIsEmpty = false;
}
goto done;
}
}
if (!setBlockIsEmpty && aBlockIsEmpty) {
// The first time we reach here is when this is the first block
// and we have processed all its normal lines.
setBlockIsEmpty = true;
// All lines are empty, or we wouldn't be here!
*aBlockIsEmpty = aRS.frame->IsSelfEmpty();
}
}
}
done:
if (!setBlockIsEmpty && aBlockIsEmpty) {
*aBlockIsEmpty = aRS.frame->IsEmpty();
}
#ifdef NOISY_VERTICAL_MARGINS
nsFrame::ListTag(stdout, aRS.frame);
printf(": => %d\n", aMargin->get());
#endif
return dirtiedLine;
}
void
nsSVGOuterSVGFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsSVGOuterSVGFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsSVGOuterSVGFrame::Reflow: availSize=%d,%d",
aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
aStatus = NS_FRAME_COMPLETE;
aDesiredSize.Width() = aReflowState.ComputedWidth() +
aReflowState.ComputedPhysicalBorderPadding().LeftRight();
aDesiredSize.Height() = aReflowState.ComputedHeight() +
aReflowState.ComputedPhysicalBorderPadding().TopBottom();
NS_ASSERTION(!GetPrevInFlow(), "SVG can't currently be broken across pages.");
SVGSVGElement *svgElem = static_cast<SVGSVGElement*>(mContent);
nsSVGOuterSVGAnonChildFrame *anonKid =
static_cast<nsSVGOuterSVGAnonChildFrame*>(GetFirstPrincipalChild());
if (mState & NS_FRAME_FIRST_REFLOW) {
// Initialize
svgElem->UpdateHasChildrenOnlyTransform();
}
// If our SVG viewport has changed, update our content and notify.
// http://www.w3.org/TR/SVG11/coords.html#ViewportSpace
svgFloatSize newViewportSize(
nsPresContext::AppUnitsToFloatCSSPixels(aReflowState.ComputedWidth()),
nsPresContext::AppUnitsToFloatCSSPixels(aReflowState.ComputedHeight()));
svgFloatSize oldViewportSize = svgElem->GetViewportSize();
uint32_t changeBits = 0;
if (newViewportSize != oldViewportSize) {
// When our viewport size changes, we may need to update the overflow rects
// of our child frames. This is the case if:
//
// * We have a real/synthetic viewBox (a children-only transform), since
// the viewBox transform will change as the viewport dimensions change.
//
// * We do not have a real/synthetic viewBox, but the last time we
// reflowed (or the last time UpdateOverflow() was called) we did.
//
// We only handle the former case here, in which case we mark all our child
// frames as dirty so that we reflow them below and update their overflow
// rects.
//
// In the latter case, updating of overflow rects is handled for removal of
// real viewBox (the viewBox attribute) in AttributeChanged. Synthetic
// viewBox "removal" (e.g. a document references the same SVG via both an
// <svg:image> and then as a CSS background image (a synthetic viewBox is
// used when painting the former, but not when painting the latter)) is
// handled in SVGSVGElement::FlushImageTransformInvalidation.
//
if (svgElem->HasViewBoxOrSyntheticViewBox()) {
nsIFrame* anonChild = GetFirstPrincipalChild();
anonChild->AddStateBits(NS_FRAME_IS_DIRTY);
for (nsIFrame* child = anonChild->GetFirstPrincipalChild(); child;
child = child->GetNextSibling()) {
child->AddStateBits(NS_FRAME_IS_DIRTY);
}
}
changeBits |= COORD_CONTEXT_CHANGED;
svgElem->SetViewportSize(newViewportSize);
}
if (mFullZoom != PresContext()->GetFullZoom()) {
changeBits |= FULL_ZOOM_CHANGED;
mFullZoom = PresContext()->GetFullZoom();
}
if (changeBits) {
NotifyViewportOrTransformChanged(changeBits);
}
mViewportInitialized = true;
// Now that we've marked the necessary children as dirty, call
// ReflowSVG() or ReflowSVGNonDisplayText() on them, depending
// on whether we are non-display.
mCallingReflowSVG = true;
if (GetStateBits() & NS_FRAME_IS_NONDISPLAY) {
ReflowSVGNonDisplayText(this);
} else {
// Update the mRects and visual overflow rects of all our descendants,
// including our anonymous wrapper kid:
anonKid->AddStateBits(mState & NS_FRAME_IS_DIRTY);
anonKid->ReflowSVG();
NS_ABORT_IF_FALSE(!anonKid->GetNextSibling(),
"We should have one anonymous child frame wrapping our real children");
}
mCallingReflowSVG = false;
// Set our anonymous kid's offset from our border box:
anonKid->SetPosition(GetContentRectRelativeToSelf().TopLeft());
// Including our size in our overflow rects regardless of the value of
// 'background', 'border', etc. makes sure that we usually (when we clip to
// our content area) don't have to keep changing our overflow rects as our
// descendants move about (see perf comment below). Including our size in our
// scrollable overflow rect also makes sure that we scroll if we're too big
// for our viewport.
//
// <svg> never allows scrolling to anything outside its mRect (only panning),
// so we must always keep our scrollable overflow set to our size.
//
// With regards to visual overflow, we always clip root-<svg> (see our
// BuildDisplayList method) regardless of the value of the 'overflow'
// property since that is per-spec, even for the initial 'visible' value. For
// that reason there's no point in adding descendant visual overflow to our
// own when this frame is for a root-<svg>. That said, there's also a very
// good performance reason for us wanting to avoid doing so. If we did, then
// the frame's overflow would often change as descendants that are partially
// or fully outside its rect moved (think animation on/off screen), and that
// would cause us to do a full NS_FRAME_IS_DIRTY reflow and repaint of the
// entire document tree each such move (see bug 875175).
//
// So it's only non-root outer-<svg> that has the visual overflow of its
// descendants added to its own. (Note that the default user-agent style
// sheet makes 'hidden' the default value for :not(root(svg)), so usually
// FinishAndStoreOverflow will still clip this back to the frame's rect.)
//
// WARNING!! Keep UpdateBounds below in sync with whatever we do for our
// overflow rects here! (Again, see bug 875175.)
//
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (!mIsRootContent) {
aDesiredSize.mOverflowAreas.VisualOverflow().UnionRect(
aDesiredSize.mOverflowAreas.VisualOverflow(),
anonKid->GetVisualOverflowRect() + anonKid->GetPosition());
}
FinishAndStoreOverflow(&aDesiredSize);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsSVGOuterSVGFrame::Reflow: size=%d,%d",
aDesiredSize.Width(), aDesiredSize.Height()));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
void
nsFieldSetFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsFieldSetFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_PRECONDITION(aReflowState.ComputedWidth() != NS_INTRINSICSIZE,
"Should have a precomputed width!");
// Initialize OUT parameter
aStatus = NS_FRAME_COMPLETE;
nsOverflowAreas ocBounds;
nsReflowStatus ocStatus = NS_FRAME_COMPLETE;
if (GetPrevInFlow()) {
ReflowOverflowContainerChildren(aPresContext, aReflowState, ocBounds, 0,
ocStatus);
}
//------------ Handle Incremental Reflow -----------------
bool reflowInner;
bool reflowLegend;
nsIFrame* legend = GetLegend();
nsIFrame* inner = GetInner();
if (aReflowState.ShouldReflowAllKids()) {
reflowInner = inner != nullptr;
reflowLegend = legend != nullptr;
} else {
reflowInner = inner && NS_SUBTREE_DIRTY(inner);
reflowLegend = legend && NS_SUBTREE_DIRTY(legend);
}
// We don't allow fieldsets to break vertically. If we did, we'd
// need logic here to push and pull overflow frames.
// Since we're not applying our padding in this frame, we need to add it here
// to compute the available width for our children.
WritingMode innerWM = inner ? inner->GetWritingMode() : GetWritingMode();
WritingMode legendWM = legend ? legend->GetWritingMode() : GetWritingMode();
LogicalSize innerAvailSize = aReflowState.ComputedSizeWithPadding(innerWM);
LogicalSize legendAvailSize = aReflowState.ComputedSizeWithPadding(legendWM);
innerAvailSize.BSize(innerWM) = legendAvailSize.BSize(legendWM) =
NS_UNCONSTRAINEDSIZE;
NS_ASSERTION(!inner ||
nsLayoutUtils::IntrinsicForContainer(aReflowState.rendContext,
inner,
nsLayoutUtils::MIN_ISIZE) <=
innerAvailSize.ISize(innerWM),
"Bogus availSize.ISize; should be bigger");
NS_ASSERTION(!legend ||
nsLayoutUtils::IntrinsicForContainer(aReflowState.rendContext,
legend,
nsLayoutUtils::MIN_ISIZE) <=
legendAvailSize.ISize(legendWM),
"Bogus availSize.ISize; should be bigger");
// get our border and padding
nsMargin border = aReflowState.ComputedPhysicalBorderPadding() - aReflowState.ComputedPhysicalPadding();
// Figure out how big the legend is if there is one.
// get the legend's margin
nsMargin legendMargin(0,0,0,0);
// reflow the legend only if needed
Maybe<nsHTMLReflowState> legendReflowState;
if (legend) {
legendReflowState.emplace(aPresContext, aReflowState, legend,
legendAvailSize);
}
if (reflowLegend) {
nsHTMLReflowMetrics legendDesiredSize(aReflowState);
ReflowChild(legend, aPresContext, legendDesiredSize, *legendReflowState,
0, 0, NS_FRAME_NO_MOVE_FRAME, aStatus);
#ifdef NOISY_REFLOW
printf(" returned (%d, %d)\n",
legendDesiredSize.Width(), legendDesiredSize.Height());
#endif
// figure out the legend's rectangle
legendMargin = legend->GetUsedMargin();
mLegendRect.width = legendDesiredSize.Width() + legendMargin.left + legendMargin.right;
mLegendRect.height = legendDesiredSize.Height() + legendMargin.top + legendMargin.bottom;
mLegendRect.x = 0;
mLegendRect.y = 0;
nscoord oldSpace = mLegendSpace;
mLegendSpace = 0;
if (mLegendRect.height > border.top) {
// center the border on the legend
mLegendSpace = mLegendRect.height - border.top;
} else {
mLegendRect.y = (border.top - mLegendRect.height)/2;
}
// if the legend space changes then we need to reflow the
// content area as well.
if (mLegendSpace != oldSpace && inner) {
reflowInner = true;
}
FinishReflowChild(legend, aPresContext, legendDesiredSize,
legendReflowState.ptr(), 0, 0, NS_FRAME_NO_MOVE_FRAME);
} else if (!legend) {
mLegendRect.SetEmpty();
mLegendSpace = 0;
} else {
// mLegendSpace and mLegendRect haven't changed, but we need
// the used margin when placing the legend.
legendMargin = legend->GetUsedMargin();
}
// reflow the content frame only if needed
if (reflowInner) {
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, inner,
innerAvailSize, -1, -1,
nsHTMLReflowState::CALLER_WILL_INIT);
// Override computed padding, in case it's percentage padding
kidReflowState.Init(aPresContext, -1, -1, nullptr,
&aReflowState.ComputedPhysicalPadding());
// Our child is "height:100%" but we actually want its height to be reduced
// by the amount of content-height the legend is eating up, unless our
// height is unconstrained (in which case the child's will be too).
if (aReflowState.ComputedHeight() != NS_UNCONSTRAINEDSIZE) {
kidReflowState.SetComputedHeight(
std::max(0, aReflowState.ComputedHeight() - mLegendSpace));
}
if (aReflowState.ComputedMinHeight() > 0) {
kidReflowState.ComputedMinHeight() =
std::max(0, aReflowState.ComputedMinHeight() - mLegendSpace);
}
if (aReflowState.ComputedMaxHeight() != NS_UNCONSTRAINEDSIZE) {
kidReflowState.ComputedMaxHeight() =
std::max(0, aReflowState.ComputedMaxHeight() - mLegendSpace);
}
nsHTMLReflowMetrics kidDesiredSize(kidReflowState,
aDesiredSize.mFlags);
// Reflow the frame
NS_ASSERTION(kidReflowState.ComputedPhysicalMargin() == nsMargin(0,0,0,0),
"Margins on anonymous fieldset child not supported!");
nsPoint pt(border.left, border.top + mLegendSpace);
ReflowChild(inner, aPresContext, kidDesiredSize, kidReflowState,
pt.x, pt.y, 0, aStatus);
FinishReflowChild(inner, aPresContext, kidDesiredSize,
&kidReflowState, pt.x, pt.y, 0);
NS_FRAME_TRACE_REFLOW_OUT("FieldSet::Reflow", aStatus);
}
LogicalRect contentRect(innerWM);
if (inner) {
// We don't support margins on inner, so our content rect is just the
// inner's border-box.
contentRect = inner->GetLogicalRect(aReflowState.ComputedWidth());
}
// Our content rect must fill up the available width
if (innerAvailSize.ISize(innerWM) > contentRect.ISize(innerWM)) {
contentRect.ISize(innerWM) = innerAvailSize.ISize(innerWM);
}
//XXX temporary!
nsRect physicalContentRect =
contentRect.GetPhysicalRect(innerWM, aReflowState.ComputedWidth());
if (legend) {
// the legend is postioned horizontally within the inner's content rect
// (so that padding on the fieldset affects the legend position).
nsRect innerContentRect = physicalContentRect;
innerContentRect.Deflate(aReflowState.ComputedPhysicalPadding());
// if the inner content rect is larger than the legend, we can align the legend
if (innerContentRect.width > mLegendRect.width) {
int32_t align = static_cast<nsLegendFrame*>
(legend->GetContentInsertionFrame())->GetAlign();
switch (align) {
case NS_STYLE_TEXT_ALIGN_RIGHT:
mLegendRect.x = innerContentRect.XMost() - mLegendRect.width;
break;
case NS_STYLE_TEXT_ALIGN_CENTER:
// Note: rounding removed; there doesn't seem to be any need
mLegendRect.x = innerContentRect.width / 2 - mLegendRect.width / 2 + innerContentRect.x;
break;
default:
mLegendRect.x = innerContentRect.x;
break;
}
} else {
// otherwise make place for the legend
mLegendRect.x = innerContentRect.x;
innerContentRect.width = mLegendRect.width;
physicalContentRect.width = mLegendRect.width +
aReflowState.ComputedPhysicalPadding().LeftRight();
}
// place the legend
nsRect actualLegendRect(mLegendRect);
actualLegendRect.Deflate(legendMargin);
nsPoint actualLegendPos(actualLegendRect.TopLeft());
legendReflowState->ApplyRelativePositioning(&actualLegendPos);
legend->SetPosition(actualLegendPos);
nsContainerFrame::PositionFrameView(legend);
nsContainerFrame::PositionChildViews(legend);
}
// Return our size and our result.
WritingMode wm = aReflowState.GetWritingMode();
nsSize finalSize(physicalContentRect.width + border.LeftRight(),
mLegendSpace + border.TopBottom() +
(inner ? inner->GetRect().height : 0));
aDesiredSize.SetSize(wm, LogicalSize(wm, finalSize));
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (legend)
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, legend);
if (inner)
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, inner);
// Merge overflow container bounds and status.
aDesiredSize.mOverflowAreas.UnionWith(ocBounds);
NS_MergeReflowStatusInto(&aStatus, ocStatus);
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus);
InvalidateFrame();
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
nsColumnSetFrame::ReflowConfig
nsColumnSetFrame::ChooseColumnStrategy(const nsHTMLReflowState& aReflowState,
bool aForceAuto = false,
nscoord aFeasibleHeight = NS_INTRINSICSIZE,
nscoord aInfeasibleHeight = 0)
{
nscoord knownFeasibleHeight = aFeasibleHeight;
nscoord knownInfeasibleHeight = aInfeasibleHeight;
const nsStyleColumn* colStyle = StyleColumn();
nscoord availContentWidth = GetAvailableContentWidth(aReflowState);
if (aReflowState.ComputedWidth() != NS_INTRINSICSIZE) {
availContentWidth = aReflowState.ComputedWidth();
}
nscoord consumedBSize = GetConsumedBSize();
// The effective computed height is the height of the current continuation
// of the column set frame. This should be the same as the computed height
// if we have an unconstrained available height.
nscoord computedBSize = GetEffectiveComputedBSize(aReflowState,
consumedBSize);
nscoord colHeight = GetAvailableContentHeight(aReflowState);
if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
colHeight = aReflowState.ComputedHeight();
} else if (aReflowState.ComputedMaxHeight() != NS_INTRINSICSIZE) {
colHeight = std::min(colHeight, aReflowState.ComputedMaxHeight());
}
nscoord colGap = GetColumnGap(this, colStyle);
int32_t numColumns = colStyle->mColumnCount;
// If column-fill is set to 'balance', then we want to balance the columns.
const bool isBalancing = colStyle->mColumnFill == NS_STYLE_COLUMN_FILL_BALANCE
&& !aForceAuto;
if (isBalancing) {
const uint32_t MAX_NESTED_COLUMN_BALANCING = 2;
uint32_t cnt = 0;
for (const nsHTMLReflowState* rs = aReflowState.parentReflowState;
rs && cnt < MAX_NESTED_COLUMN_BALANCING; rs = rs->parentReflowState) {
if (rs->mFlags.mIsColumnBalancing) {
++cnt;
}
}
if (cnt == MAX_NESTED_COLUMN_BALANCING) {
numColumns = 1;
}
}
nscoord colWidth;
if (colStyle->mColumnWidth.GetUnit() == eStyleUnit_Coord) {
colWidth = colStyle->mColumnWidth.GetCoordValue();
NS_ASSERTION(colWidth >= 0, "negative column width");
// Reduce column count if necessary to make columns fit in the
// available width. Compute max number of columns that fit in
// availContentWidth, satisfying colGap*(maxColumns - 1) +
// colWidth*maxColumns <= availContentWidth
if (availContentWidth != NS_INTRINSICSIZE && colGap + colWidth > 0
&& numColumns > 0) {
// This expression uses truncated rounding, which is what we
// want
int32_t maxColumns =
std::min(nscoord(nsStyleColumn::kMaxColumnCount),
(availContentWidth + colGap)/(colGap + colWidth));
numColumns = std::max(1, std::min(numColumns, maxColumns));
}
} else if (numColumns > 0 && availContentWidth != NS_INTRINSICSIZE) {
nscoord widthMinusGaps = availContentWidth - colGap*(numColumns - 1);
colWidth = widthMinusGaps/numColumns;
} else {
colWidth = NS_INTRINSICSIZE;
}
// Take care of the situation where there's only one column but it's
// still too wide
colWidth = std::max(1, std::min(colWidth, availContentWidth));
nscoord expectedWidthLeftOver = 0;
if (colWidth != NS_INTRINSICSIZE && availContentWidth != NS_INTRINSICSIZE) {
// distribute leftover space
// First, determine how many columns will be showing if the column
// count is auto
if (numColumns <= 0) {
// choose so that colGap*(nominalColumnCount - 1) +
// colWidth*nominalColumnCount is nearly availContentWidth
// make sure to round down
if (colGap + colWidth > 0) {
numColumns = (availContentWidth + colGap)/(colGap + colWidth);
// The number of columns should never exceed kMaxColumnCount.
numColumns = std::min(nscoord(nsStyleColumn::kMaxColumnCount),
numColumns);
}
if (numColumns <= 0) {
numColumns = 1;
}
}
// Compute extra space and divide it among the columns
nscoord extraSpace =
std::max(0, availContentWidth - (colWidth*numColumns + colGap*(numColumns - 1)));
nscoord extraToColumns = extraSpace/numColumns;
colWidth += extraToColumns;
expectedWidthLeftOver = extraSpace - (extraToColumns*numColumns);
}
if (isBalancing) {
if (numColumns <= 0) {
// Hmm, auto column count, column width or available width is unknown,
// and balancing is required. Let's just use one column then.
numColumns = 1;
}
colHeight = std::min(mLastBalanceHeight, colHeight);
} else {
// This is the case when the column-fill property is set to 'auto'.
// No balancing, so don't limit the column count
numColumns = INT32_MAX;
// XXX_jwir3: If a page's height is set to 0, we could continually
// create continuations, resulting in an infinite loop, since
// no progress is ever made. This is an issue with the spec
// (css3-multicol, css3-page, and css3-break) that is
// unresolved as of 27 Feb 2013. For the time being, we set this
// to have a minimum of 1 css px. Once a resolution is made
// on what minimum to have for a page height, we may need to
// change this value to match the appropriate spec(s).
colHeight = std::max(colHeight, nsPresContext::CSSPixelsToAppUnits(1));
}
#ifdef DEBUG_roc
printf("*** nsColumnSetFrame::ChooseColumnStrategy: numColumns=%d, colWidth=%d, expectedWidthLeftOver=%d, colHeight=%d, colGap=%d\n",
numColumns, colWidth, expectedWidthLeftOver, colHeight, colGap);
#endif
ReflowConfig config = { numColumns, colWidth, expectedWidthLeftOver, colGap,
colHeight, isBalancing, knownFeasibleHeight,
knownInfeasibleHeight, computedBSize, consumedBSize };
return config;
}
void
nsProgressFrame::ReflowBarFrame(nsIFrame* aBarFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
bool vertical = ResolvedOrientationIsVertical();
WritingMode wm = aBarFrame->GetWritingMode();
LogicalSize availSize = aReflowState.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
nsHTMLReflowState reflowState(aPresContext, aReflowState,
aBarFrame, availSize);
nscoord size = vertical ? aReflowState.ComputedHeight()
: aReflowState.ComputedWidth();
nscoord xoffset = aReflowState.ComputedPhysicalBorderPadding().left;
nscoord yoffset = aReflowState.ComputedPhysicalBorderPadding().top;
double position = static_cast<HTMLProgressElement*>(mContent)->Position();
// Force the bar's size to match the current progress.
// When indeterminate, the progress' size will be 100%.
if (position >= 0.0) {
size *= position;
}
if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
xoffset += aReflowState.ComputedWidth() - size;
}
// The bar size is fixed in these cases:
// - the progress position is determined: the bar size is fixed according
// to it's value.
// - the progress position is indeterminate and the bar appearance should be
// shown as native: the bar size is forced to 100%.
// Otherwise (when the progress is indeterminate and the bar appearance isn't
// native), the bar size isn't fixed and can be set by the author.
if (position != -1 || ShouldUseNativeStyle()) {
if (vertical) {
// We want the bar to begin at the bottom.
yoffset += aReflowState.ComputedHeight() - size;
size -= reflowState.ComputedPhysicalMargin().TopBottom() +
reflowState.ComputedPhysicalBorderPadding().TopBottom();
size = std::max(size, 0);
reflowState.SetComputedHeight(size);
} else {
size -= reflowState.ComputedPhysicalMargin().LeftRight() +
reflowState.ComputedPhysicalBorderPadding().LeftRight();
size = std::max(size, 0);
reflowState.SetComputedWidth(size);
}
} else if (vertical) {
// For vertical progress bars, we need to position the bar specificly when
// the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
// because aReflowState.ComputedHeight() - size == 0.
yoffset += aReflowState.ComputedHeight() - reflowState.ComputedHeight();
}
xoffset += reflowState.ComputedPhysicalMargin().left;
yoffset += reflowState.ComputedPhysicalMargin().top;
nsHTMLReflowMetrics barDesiredSize(aReflowState);
ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
yoffset, 0, aStatus);
FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowState,
xoffset, yoffset, 0);
}
void
nsColumnSetFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Don't support interruption in columns
nsPresContext::InterruptPreventer noInterrupts(aPresContext);
DO_GLOBAL_REFLOW_COUNT("nsColumnSetFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
// Initialize OUT parameter
aStatus = NS_FRAME_COMPLETE;
// Our children depend on our height if we have a fixed height.
if (aReflowState.ComputedHeight() != NS_AUTOHEIGHT) {
NS_ASSERTION(aReflowState.ComputedHeight() != NS_INTRINSICSIZE,
"Unexpected computed height");
AddStateBits(NS_FRAME_CONTAINS_RELATIVE_HEIGHT);
}
else {
RemoveStateBits(NS_FRAME_CONTAINS_RELATIVE_HEIGHT);
}
#ifdef DEBUG
nsFrameList::Enumerator oc(GetChildList(kOverflowContainersList));
for (; !oc.AtEnd(); oc.Next()) {
MOZ_ASSERT(!IS_TRUE_OVERFLOW_CONTAINER(oc.get()));
}
nsFrameList::Enumerator eoc(GetChildList(kExcessOverflowContainersList));
for (; !eoc.AtEnd(); eoc.Next()) {
MOZ_ASSERT(!IS_TRUE_OVERFLOW_CONTAINER(eoc.get()));
}
#endif
nsOverflowAreas ocBounds;
nsReflowStatus ocStatus = NS_FRAME_COMPLETE;
if (GetPrevInFlow()) {
ReflowOverflowContainerChildren(aPresContext, aReflowState, ocBounds, 0,
ocStatus);
}
//------------ Handle Incremental Reflow -----------------
ReflowConfig config = ChooseColumnStrategy(aReflowState);
// If balancing, then we allow the last column to grow to unbounded
// height during the first reflow. This gives us a way to estimate
// what the average column height should be, because we can measure
// the heights of all the columns and sum them up. But don't do this
// if we have a next in flow because we don't want to suck all its
// content back here and then have to push it out again!
nsIFrame* nextInFlow = GetNextInFlow();
bool unboundedLastColumn = config.mIsBalancing && !nextInFlow;
nsCollapsingMargin carriedOutBottomMargin;
ColumnBalanceData colData;
colData.mHasExcessHeight = false;
bool feasible = ReflowColumns(aDesiredSize, aReflowState, aStatus, config,
unboundedLastColumn, &carriedOutBottomMargin,
colData);
// If we're not balancing, then we're already done, since we should have
// reflown all of our children, and there is no need for a binary search to
// determine proper column height.
if (config.mIsBalancing && !aPresContext->HasPendingInterrupt()) {
FindBestBalanceHeight(aReflowState, aPresContext, config, colData,
aDesiredSize, carriedOutBottomMargin,
unboundedLastColumn, feasible, aStatus);
}
if (aPresContext->HasPendingInterrupt() &&
aReflowState.AvailableHeight() == NS_UNCONSTRAINEDSIZE) {
// In this situation, we might be lying about our reflow status, because
// our last kid (the one that got interrupted) was incomplete. Fix that.
aStatus = NS_FRAME_COMPLETE;
}
NS_ASSERTION(NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
aReflowState.AvailableHeight() != NS_UNCONSTRAINEDSIZE,
"Column set should be complete if the available height is unconstrained");
// Merge overflow container bounds and status.
aDesiredSize.mOverflowAreas.UnionWith(ocBounds);
NS_MergeReflowStatusInto(&aStatus, ocStatus);
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus, false);
aDesiredSize.mCarriedOutBEndMargin = carriedOutBottomMargin;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
void
nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsIFrame* aFirstKid,
nsMargin aFocusPadding,
nsReflowStatus& aStatus)
{
nsSize availSize(aReflowState.ComputedWidth(), NS_INTRINSICSIZE);
// Indent the child inside us by the focus border. We must do this separate
// from the regular border.
availSize.width -= aFocusPadding.LeftRight();
// See whether out availSize's width is big enough. If it's smaller than our
// intrinsic min width, that means that the kid wouldn't really fit; for a
// better look in such cases we adjust the available width and our left
// offset to allow the kid to spill left into our padding.
nscoord xoffset = aFocusPadding.left + aReflowState.mComputedBorderPadding.left;
nscoord extrawidth = GetMinWidth(aReflowState.rendContext) -
aReflowState.ComputedWidth();
if (extrawidth > 0) {
nscoord extraleft = extrawidth / 2;
nscoord extraright = extrawidth - extraleft;
NS_ASSERTION(extraright >=0, "How'd that happen?");
// Do not allow the extras to be bigger than the relevant padding
extraleft = std::min(extraleft, aReflowState.mComputedPadding.left);
extraright = std::min(extraright, aReflowState.mComputedPadding.right);
xoffset -= extraleft;
availSize.width += extraleft + extraright;
}
availSize.width = std::max(availSize.width,0);
nsHTMLReflowState reflowState(aPresContext, aReflowState, aFirstKid,
availSize);
ReflowChild(aFirstKid, aPresContext, aDesiredSize, reflowState,
xoffset,
aFocusPadding.top + aReflowState.mComputedBorderPadding.top,
0, aStatus);
// Compute our desired height before vertically centering our children
nscoord actualDesiredHeight = 0;
if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
actualDesiredHeight = aReflowState.ComputedHeight();
} else {
actualDesiredHeight = aDesiredSize.height + aFocusPadding.TopBottom();
// Make sure we obey min/max-height in the case when we're doing intrinsic
// sizing (we get it for free when we have a non-intrinsic
// aReflowState.ComputedHeight()). Note that we do this before adjusting
// for borderpadding, since mComputedMaxHeight and mComputedMinHeight are
// content heights.
actualDesiredHeight = NS_CSS_MINMAX(actualDesiredHeight,
aReflowState.mComputedMinHeight,
aReflowState.mComputedMaxHeight);
}
// center child vertically in the content area
nscoord yoff = (actualDesiredHeight - aFocusPadding.TopBottom() - aDesiredSize.height) / 2;
if (yoff < 0) {
yoff = 0;
}
// Place the child
FinishReflowChild(aFirstKid, aPresContext, &reflowState, aDesiredSize,
xoffset,
yoff + aFocusPadding.top + aReflowState.mComputedBorderPadding.top, 0);
if (aDesiredSize.ascent == nsHTMLReflowMetrics::ASK_FOR_BASELINE)
aDesiredSize.ascent = aFirstKid->GetBaseline();
// Adjust the baseline by our offset (since we moved the child's
// baseline by that much), and set our actual desired height.
aDesiredSize.ascent += yoff;
aDesiredSize.height = actualDesiredHeight;
}
NS_IMETHODIMP
nsVideoFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsVideoFrame::Reflow: availSize=%d,%d",
aReflowState.availableWidth, aReflowState.availableHeight));
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
aStatus = NS_FRAME_COMPLETE;
aMetrics.width = aReflowState.ComputedWidth();
aMetrics.height = aReflowState.ComputedHeight();
// stash this away so we can compute our inner area later
mBorderPadding = aReflowState.mComputedBorderPadding;
aMetrics.width += mBorderPadding.left + mBorderPadding.right;
aMetrics.height += mBorderPadding.top + mBorderPadding.bottom;
// Reflow the child frames. We may have up to two, an image frame
// which is the poster, and a box frame, which is the video controls.
for (nsIFrame *child = mFrames.FirstChild();
child;
child = child->GetNextSibling()) {
if (child->GetType() == nsGkAtoms::imageFrame) {
// Reflow the poster frame.
nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
nsHTMLReflowMetrics kidDesiredSize;
nsSize availableSize = nsSize(aReflowState.availableWidth,
aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext,
aReflowState,
imageFrame,
availableSize,
aMetrics.width,
aMetrics.height);
if (ShouldDisplayPoster()) {
kidReflowState.SetComputedWidth(aReflowState.ComputedWidth());
kidReflowState.SetComputedHeight(aReflowState.ComputedHeight());
} else {
kidReflowState.SetComputedWidth(0);
kidReflowState.SetComputedHeight(0);
}
ReflowChild(imageFrame, aPresContext, kidDesiredSize, kidReflowState,
mBorderPadding.left, mBorderPadding.top, 0, aStatus);
FinishReflowChild(imageFrame, aPresContext,
&kidReflowState, kidDesiredSize,
mBorderPadding.left, mBorderPadding.top, 0);
} else if (child->GetType() == nsGkAtoms::boxFrame) {
// Reflow the video controls frame.
nsBoxLayoutState boxState(PresContext(), aReflowState.rendContext);
nsBoxFrame::LayoutChildAt(boxState,
child,
nsRect(mBorderPadding.left,
mBorderPadding.top,
aReflowState.ComputedWidth(),
aReflowState.ComputedHeight()));
}
}
aMetrics.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aMetrics);
if (mRect.width != aMetrics.width || mRect.height != aMetrics.height) {
Invalidate(nsRect(0, 0, mRect.width, mRect.height));
}
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsVideoFrame::Reflow: size=%d,%d",
aMetrics.width, aMetrics.height));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
return NS_OK;
}
