void
nsMathMLTokenFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// initializations needed for empty markup like <mtag></mtag>
aDesiredSize.Width() = aDesiredSize.Height() = 0;
aDesiredSize.SetTopAscent(0);
aDesiredSize.mBoundingMetrics = nsBoundingMetrics();
nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
nsIFrame* childFrame = GetFirstPrincipalChild();
while (childFrame) {
// ask our children to compute their bounding metrics
nsHTMLReflowMetrics childDesiredSize(aReflowState.GetWritingMode(),
aDesiredSize.mFlags
| NS_REFLOW_CALC_BOUNDING_METRICS);
nsHTMLReflowState childReflowState(aPresContext, aReflowState,
childFrame, availSize);
ReflowChild(childFrame, aPresContext, childDesiredSize,
childReflowState, aStatus);
//NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
childDesiredSize.mBoundingMetrics);
childFrame = childFrame->GetNextSibling();
}
// place and size children
FinalizeReflow(*aReflowState.rendContext, aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
void
nsMathMLTokenFrame::MarkTextFramesAsTokenMathML()
{
nsIFrame* child = nullptr;
uint32_t childCount = 0;
// Set flags on child text frames
// - to force them to trim their leading and trailing whitespaces.
// - Indicate which frames are suitable for mathvariant
// - flag single character <mi> frames for special italic treatment
for (nsIFrame* childFrame = GetFirstPrincipalChild(); childFrame;
childFrame = childFrame->GetNextSibling()) {
for (nsIFrame* childFrame2 = childFrame->GetFirstPrincipalChild();
childFrame2; childFrame2 = childFrame2->GetNextSibling()) {
if (childFrame2->GetType() == nsGkAtoms::textFrame) {
childFrame2->AddStateBits(TEXT_IS_IN_TOKEN_MATHML);
child = childFrame2;
childCount++;
}
}
}
if (mContent->Tag() == nsGkAtoms::mi_ && childCount == 1) {
nsAutoString data;
nsContentUtils::GetNodeTextContent(mContent, false, data);
data.CompressWhitespace();
int32_t length = data.Length();
bool isSingleCharacter = length == 1 ||
(length == 2 && NS_IS_HIGH_SURROGATE(data[0]));
if (isSingleCharacter) {
child->AddStateBits(TEXT_IS_IN_SINGLE_CHAR_MI);
}
}
}
void
nsSVGForeignObjectFrame::MaybeReflowFromOuterSVGFrame()
{
// If IsDisabled() is true, then we know that our DoReflow() call will return
// early, leaving us with a marked-dirty but not-reflowed kid. That'd be bad;
// it'd mean that all future calls to this method would be doomed to take the
// NS_FRAME_IS_DIRTY early-return below. To avoid that problem, we need to
// bail out *before* we mark our kid as dirty.
if (IsDisabled()) {
return;
}
nsIFrame* kid = GetFirstPrincipalChild();
// If we're already scheduled to reflow (if we or our kid is dirty) we don't
// want to reflow now or else our presShell will do extra work trying to
// reflow us a second time. (It will also complain if it finds that a reflow
// root scheduled for reflow isn't dirty).
if (kid->GetStateBits() & NS_FRAME_IS_DIRTY) {
return;
}
kid->AddStateBits(NS_FRAME_IS_DIRTY); // we must be fully marked dirty
if (kid->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN) {
return;
}
// Make sure to not allow interrupts if we're not being reflown as a root
nsPresContext::InterruptPreventer noInterrupts(PresContext());
DoReflow();
}
NS_IMETHODIMP
nsTextControlFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList)
{
nsresult rv = nsBoxFrame::SetInitialChildList(aListID, aChildList);
nsIFrame* first = GetFirstPrincipalChild();
// Mark the scroll frame as being a reflow root. This will allow
// incremental reflows to be initiated at the scroll frame, rather
// than descending from the root frame of the frame hierarchy.
if (first) {
first->AddStateBits(NS_FRAME_REFLOW_ROOT);
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
txtCtrl->InitializeKeyboardEventListeners();
nsPoint* contentScrollPos = static_cast<nsPoint*>
(Properties().Get(ContentScrollPos()));
if (contentScrollPos) {
// If we have a scroll pos stored to be passed to our anonymous
// div, do it here!
nsIStatefulFrame* statefulFrame = do_QueryFrame(first);
NS_ASSERTION(statefulFrame, "unexpected type of frame for the anonymous div");
nsPresState fakePresState;
fakePresState.SetScrollState(*contentScrollPos);
statefulFrame->RestoreState(&fakePresState);
Properties().Remove(ContentScrollPos());
delete contentScrollPos;
}
}
return rv;
}
NS_IMETHODIMP
nsProgressMeterFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"Scripts not blocked in nsProgressMeterFrame::AttributeChanged!");
nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
if (NS_OK != rv) {
return rv;
}
// did the progress change?
bool undetermined = mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::mode,
nsGkAtoms::undetermined, eCaseMatters);
if (nsGkAtoms::mode == aAttribute ||
(!undetermined &&
(nsGkAtoms::value == aAttribute || nsGkAtoms::max == aAttribute))) {
nsIFrame* barChild = GetFirstPrincipalChild();
if (!barChild) return NS_OK;
nsIFrame* remainderChild = barChild->GetNextSibling();
if (!remainderChild) return NS_OK;
nsCOMPtr<nsIContent> remainderContent = remainderChild->GetContent();
if (!remainderContent) return NS_OK;
PRInt32 flex = 1, maxFlex = 1;
if (!undetermined) {
nsAutoString value, maxValue;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, value);
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::max, maxValue);
nsresult error;
flex = value.ToInteger(&error);
maxFlex = maxValue.ToInteger(&error);
if (NS_FAILED(error) || maxValue.IsEmpty()) {
maxFlex = 100;
}
if (maxFlex < 1) {
maxFlex = 1;
}
if (flex < 0) {
flex = 0;
}
if (flex > maxFlex) {
flex = maxFlex;
}
}
nsContentUtils::AddScriptRunner(new nsSetAttrRunnable(
barChild->GetContent(), nsGkAtoms::flex, flex));
nsContentUtils::AddScriptRunner(new nsSetAttrRunnable(
remainderContent, nsGkAtoms::flex, maxFlex - flex));
nsContentUtils::AddScriptRunner(new nsReflowFrameRunnable(
this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY));
}
return NS_OK;
}
// For token elements, mBoundingMetrics is computed at the ReflowToken
// pass, it is not computed here because our children may be text frames
// that do not implement the GetBoundingMetrics() interface.
/* virtual */ nsresult
nsMathMLTokenFrame::Place(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize)
{
mBoundingMetrics = nsBoundingMetrics();
for (nsIFrame* childFrame = GetFirstPrincipalChild(); childFrame;
childFrame = childFrame->GetNextSibling()) {
nsHTMLReflowMetrics childSize(aDesiredSize.GetWritingMode());
GetReflowAndBoundingMetricsFor(childFrame, childSize,
childSize.mBoundingMetrics, nullptr);
// compute and cache the bounding metrics
mBoundingMetrics += childSize.mBoundingMetrics;
}
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
nscoord ascent = fm->MaxAscent();
nscoord descent = fm->MaxDescent();
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
aDesiredSize.Width() = mBoundingMetrics.width;
aDesiredSize.SetTopAscent(std::max(mBoundingMetrics.ascent, ascent));
aDesiredSize.Height() = aDesiredSize.TopAscent() +
std::max(mBoundingMetrics.descent, descent);
if (aPlaceOrigin) {
nscoord dy, dx = 0;
for (nsIFrame* childFrame = GetFirstPrincipalChild(); childFrame;
childFrame = childFrame->GetNextSibling()) {
nsHTMLReflowMetrics childSize(aDesiredSize.GetWritingMode());
GetReflowAndBoundingMetricsFor(childFrame, childSize,
childSize.mBoundingMetrics);
// place and size the child; (dx,0) makes the caret happy - bug 188146
dy = childSize.Height() == 0 ? 0 : aDesiredSize.TopAscent() - childSize.TopAscent();
FinishReflowChild(childFrame, PresContext(), childSize, nullptr, dx, dy, 0);
dx += childSize.Width();
}
}
SetReference(nsPoint(0, aDesiredSize.TopAscent()));
return NS_OK;
}
void
nsSVGForeignObjectFrame::UpdateBounds()
{
NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingUpdateBounds(this),
"This call is probaby a wasteful mistake");
NS_ABORT_IF_FALSE(!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD),
"UpdateBounds mechanism not designed for this");
if (!nsSVGUtils::NeedsUpdatedBounds(this)) {
return;
}
// We update mRect before the DoReflow call so that DoReflow uses the
// correct dimensions:
float x, y, w, h;
static_cast<nsSVGForeignObjectElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &w, &h, nsnull);
// If mRect's width or height are negative, reflow blows up! We must clamp!
if (w < 0.0f) w = 0.0f;
if (h < 0.0f) h = 0.0f;
// GetCanvasTM includes the x,y translation
mRect = nsLayoutUtils::RoundGfxRectToAppRect(
gfxRect(0.0, 0.0, w, h),
PresContext()->AppUnitsPerCSSPixel());
mCoveredRegion = ToCanvasBounds(gfxRect(0.0, 0.0, w, h), GetCanvasTM(), PresContext());
// Since we'll invalidate our entire area at the end of this method, we
// empty our cached dirty regions to prevent FlushDirtyRegion under DoReflow
// from wasting time invalidating:
mSameDocDirtyRegion.SetEmpty();
mSubDocDirtyRegion.SetEmpty();
// Fully mark our kid dirty so that it gets resized if necessary
// (NS_FRAME_HAS_DIRTY_CHILDREN isn't enough in that case):
nsIFrame* kid = GetFirstPrincipalChild();
kid->AddStateBits(NS_FRAME_IS_DIRTY);
// Make sure to not allow interrupts if we're not being reflown as a root:
nsPresContext::InterruptPreventer noInterrupts(PresContext());
DoReflow();
// Now unset the various reflow bits:
mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
if (!(GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
// We only invalidate if our outer-<svg> has already had its
// initial reflow (since if it hasn't, its entire area will be
// invalidated when it gets that initial reflow):
nsSVGUtils::InvalidateBounds(this, true);
}
}
virtual nsIFrame* GetContentInsertionFrame() {
nsIFrame* frame = GetFirstPrincipalChild();
// if no children return nsnull
if (!frame)
return nsnull;
return frame->GetContentInsertionFrame();
}
nsresult
nsMathMLTokenFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
// initializations needed for empty markup like <mtag></mtag>
aDesiredSize.width = aDesiredSize.height = 0;
aDesiredSize.ascent = 0;
aDesiredSize.mBoundingMetrics = nsBoundingMetrics();
nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
nsIFrame* childFrame = GetFirstPrincipalChild();
while (childFrame) {
// ask our children to compute their bounding metrics
nsHTMLReflowMetrics childDesiredSize(aDesiredSize.mFlags
| NS_REFLOW_CALC_BOUNDING_METRICS);
nsHTMLReflowState childReflowState(aPresContext, aReflowState,
childFrame, availSize);
rv = ReflowChild(childFrame, aPresContext, childDesiredSize,
childReflowState, aStatus);
//NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
if (NS_FAILED(rv)) {
// Call DidReflow() for the child frames we successfully did reflow.
DidReflowChildren(GetFirstPrincipalChild(), childFrame);
return rv;
}
SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
childDesiredSize.mBoundingMetrics);
childFrame = childFrame->GetNextSibling();
}
// place and size children
FinalizeReflow(*aReflowState.rendContext, aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
void nsSVGForeignObjectFrame::RequestReflow(nsIPresShell::IntrinsicDirty aType)
{
if (GetStateBits() & NS_FRAME_FIRST_REFLOW)
// If we haven't had a UpdateBounds yet, nothing to do.
return;
nsIFrame* kid = GetFirstPrincipalChild();
if (!kid)
return;
PresContext()->PresShell()->FrameNeedsReflow(kid, aType, NS_FRAME_IS_DIRTY);
}
void
nsSVGForeignObjectFrame::DoReflow()
{
// Skip reflow if we're zero-sized, unless this is our first reflow.
if (IsDisabled() &&
!(GetStateBits() & NS_FRAME_FIRST_REFLOW))
return;
nsPresContext *presContext = PresContext();
nsIFrame* kid = GetFirstPrincipalChild();
if (!kid)
return;
// initiate a synchronous reflow here and now:
nsIPresShell* presShell = presContext->PresShell();
NS_ASSERTION(presShell, "null presShell");
nsRefPtr<nsRenderingContext> renderingContext =
presShell->GetReferenceRenderingContext();
if (!renderingContext)
return;
mInReflow = true;
nsHTMLReflowState reflowState(presContext, kid,
renderingContext,
nsSize(mRect.width, NS_UNCONSTRAINEDSIZE));
nsHTMLReflowMetrics desiredSize;
nsReflowStatus status;
// We don't use mRect.height above because that tells the child to do
// page/column breaking at that height.
NS_ASSERTION(reflowState.mComputedBorderPadding == nsMargin(0, 0, 0, 0) &&
reflowState.mComputedMargin == nsMargin(0, 0, 0, 0),
"style system should ensure that :-moz-svg-foreign-content "
"does not get styled");
NS_ASSERTION(reflowState.ComputedWidth() == mRect.width,
"reflow state made child wrong size");
reflowState.SetComputedHeight(mRect.height);
ReflowChild(kid, presContext, desiredSize, reflowState, 0, 0,
NS_FRAME_NO_MOVE_FRAME, status);
NS_ASSERTION(mRect.width == desiredSize.width &&
mRect.height == desiredSize.height, "unexpected size");
FinishReflowChild(kid, presContext, &reflowState, desiredSize, 0, 0,
NS_FRAME_NO_MOVE_FRAME);
mInReflow = false;
if (!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)) {
FlushDirtyRegion(0);
}
}
/* virtual */ void
nsMathMLmfencedFrame::GetIntrinsicWidthMetrics(nsRenderingContext* aRenderingContext, nsHTMLReflowMetrics& aDesiredSize)
{
nscoord width = 0;
nsPresContext* presContext = PresContext();
const nsStyleFont* font = StyleFont();
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
nscoord em;
GetEmHeight(fm, em);
if (mOpenChar) {
width +=
GetMaxCharWidth(presContext, aRenderingContext, mOpenChar,
NS_MATHML_OPERATOR_FORM_PREFIX, font->mScriptLevel, em);
}
int32_t i = 0;
nsIFrame* childFrame = GetFirstPrincipalChild();
while (childFrame) {
// XXX This includes margin while Reflow currently doesn't consider
// margin, so we may end up with too much space, but, with stretchy
// characters, this is an approximation anyway.
width += nsLayoutUtils::IntrinsicForContainer(aRenderingContext, childFrame,
nsLayoutUtils::PREF_WIDTH);
if (i < mSeparatorsCount) {
width +=
GetMaxCharWidth(presContext, aRenderingContext, &mSeparatorsChar[i],
NS_MATHML_OPERATOR_FORM_INFIX, font->mScriptLevel, em);
}
i++;
childFrame = childFrame->GetNextSibling();
}
if (mCloseChar) {
width +=
GetMaxCharWidth(presContext, aRenderingContext, mCloseChar,
NS_MATHML_OPERATOR_FORM_POSTFIX, font->mScriptLevel, em);
}
aDesiredSize.Width() = width;
aDesiredSize.mBoundingMetrics.width = width;
aDesiredSize.mBoundingMetrics.leftBearing = 0;
aDesiredSize.mBoundingMetrics.rightBearing = width;
}
nsSVGForeignObjectFrame::GetFrameForPoint(const nsPoint &aPoint)
{
if (IsDisabled() || (GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD))
return nsnull;
nsIFrame* kid = GetFirstPrincipalChild();
if (!kid)
return nsnull;
float x, y, width, height;
static_cast<nsSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
gfxMatrix tm = GetCanvasTM().Invert();
if (tm.IsSingular())
return nsnull;
// Convert aPoint from app units in canvas space to user space:
gfxPoint pt = gfxPoint(aPoint.x, aPoint.y) / PresContext()->AppUnitsPerDevPixel();
pt = tm.Transform(pt);
if (!gfxRect(0.0f, 0.0f, width, height).Contains(pt))
return nsnull;
// Convert pt to app units in *local* space:
pt = pt * nsPresContext::AppUnitsPerCSSPixel();
nsPoint point = nsPoint(NSToIntRound(pt.x), NSToIntRound(pt.y));
nsIFrame *frame = nsLayoutUtils::GetFrameForPoint(kid, point);
if (frame && nsSVGUtils::HitTestClip(this, aPoint))
return frame;
return nsnull;
}
/* virtual */ nsresult
nsMathMLmpaddedFrame::Place(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize)
{
nsresult rv =
nsMathMLContainerFrame::Place(aRenderingContext, false, aDesiredSize);
if (NS_MATHML_HAS_ERROR(mPresentationData.flags) || NS_FAILED(rv)) {
DidReflowChildren(GetFirstPrincipalChild());
return rv;
}
nscoord height = mBoundingMetrics.ascent;
nscoord depth = mBoundingMetrics.descent;
// The REC says:
//
// "The lspace attribute ('leading' space) specifies the horizontal location
// of the positioning point of the child content with respect to the
// positioning point of the mpadded element. By default they coincide, and
// therefore absolute values for lspace have the same effect as relative
// values."
//
// "MathML renderers should ensure that, except for the effects of the
// attributes, the relative spacing between the contents of the mpadded
// element and surrounding MathML elements would not be modified by replacing
// an mpadded element with an mrow element with the same content, even if
// linebreaking occurs within the mpadded element."
//
// (http://www.w3.org/TR/MathML/chapter3.html#presm.mpadded)
//
// "In those discussions, the terms leading and trailing are used to specify
// a side of an object when which side to use depends on the directionality;
// ie. leading means left in LTR but right in RTL."
// (http://www.w3.org/TR/MathML/chapter3.html#presm.bidi.math)
nscoord lspace = 0;
// In MathML3, "width" will be the bounding box width and "advancewidth" will
// refer "to the horizontal distance between the positioning point of the
// mpadded and the positioning point for the following content". MathML2
// doesn't make the distinction.
nscoord width = mBoundingMetrics.width;
nscoord voffset = 0;
int32_t pseudoUnit;
nscoord initialWidth = width;
// update width
pseudoUnit = (mWidthPseudoUnit == NS_MATHML_PSEUDO_UNIT_ITSELF)
? NS_MATHML_PSEUDO_UNIT_WIDTH : mWidthPseudoUnit;
UpdateValue(mWidthSign, pseudoUnit, mWidth,
mBoundingMetrics, width);
width = NS_MAX(0, width);
// update "height" (this is the ascent in the terminology of the REC)
pseudoUnit = (mHeightPseudoUnit == NS_MATHML_PSEUDO_UNIT_ITSELF)
? NS_MATHML_PSEUDO_UNIT_HEIGHT : mHeightPseudoUnit;
UpdateValue(mHeightSign, pseudoUnit, mHeight,
mBoundingMetrics, height);
height = NS_MAX(0, height);
// update "depth" (this is the descent in the terminology of the REC)
pseudoUnit = (mDepthPseudoUnit == NS_MATHML_PSEUDO_UNIT_ITSELF)
? NS_MATHML_PSEUDO_UNIT_DEPTH : mDepthPseudoUnit;
UpdateValue(mDepthSign, pseudoUnit, mDepth,
mBoundingMetrics, depth);
depth = NS_MAX(0, depth);
// update lspace
if (mLeadingSpacePseudoUnit != NS_MATHML_PSEUDO_UNIT_ITSELF) {
pseudoUnit = mLeadingSpacePseudoUnit;
UpdateValue(mLeadingSpaceSign, pseudoUnit, mLeadingSpace,
mBoundingMetrics, lspace);
}
// update voffset
if (mVerticalOffsetPseudoUnit != NS_MATHML_PSEUDO_UNIT_ITSELF) {
pseudoUnit = mVerticalOffsetPseudoUnit;
UpdateValue(mVerticalOffsetSign, pseudoUnit, mVerticalOffset,
mBoundingMetrics, voffset);
}
// do the padding now that we have everything
// The idea here is to maintain the invariant that <mpadded>...</mpadded> (i.e.,
// with no attributes) looks the same as <mrow>...</mrow>. But when there are
// attributes, tweak our metrics and move children to achieve the desired visual
// effects.
if ((NS_MATHML_IS_RTL(mPresentationData.flags) ?
mWidthSign : mLeadingSpaceSign) != NS_MATHML_SIGN_INVALID) {
// there was padding on the left. dismiss the left italic correction now
// (so that our parent won't correct us)
mBoundingMetrics.leftBearing = 0;
}
if ((NS_MATHML_IS_RTL(mPresentationData.flags) ?
mLeadingSpaceSign : mWidthSign) != NS_MATHML_SIGN_INVALID) {
// there was padding on the right. dismiss the right italic correction now
// (so that our parent won't correct us)
mBoundingMetrics.width = width;
mBoundingMetrics.rightBearing = mBoundingMetrics.width;
}
nscoord dy = height - mBoundingMetrics.ascent;
nscoord dx = NS_MATHML_IS_RTL(mPresentationData.flags) ?
width - initialWidth - lspace : lspace;
aDesiredSize.ascent += dy;
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.height += dy + depth - mBoundingMetrics.descent;
mBoundingMetrics.ascent = height;
mBoundingMetrics.descent = depth;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
if (aPlaceOrigin) {
// Finish reflowing child frames, positioning their origins.
PositionRowChildFrames(dx, aDesiredSize.ascent - voffset);
}
return NS_OK;
}
void
nsSVGForeignObjectFrame::DoReflow()
{
NS_ASSERTION(!(nsSVGUtils::GetOuterSVGFrame(this)->
GetStateBits() & NS_FRAME_FIRST_REFLOW),
"Calling InitialUpdate too early - must not call DoReflow!!!");
// Skip reflow if we're zero-sized, unless this is our first reflow.
if (IsDisabled() &&
!(GetStateBits() & NS_FRAME_FIRST_REFLOW))
return;
if (GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)
return;
nsPresContext *presContext = PresContext();
nsIFrame* kid = GetFirstPrincipalChild();
if (!kid)
return;
// initiate a synchronous reflow here and now:
nsSize availableSpace(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
nsIPresShell* presShell = presContext->PresShell();
NS_ASSERTION(presShell, "null presShell");
nsRefPtr<nsRenderingContext> renderingContext =
presShell->GetReferenceRenderingContext();
if (!renderingContext)
return;
nsSVGForeignObjectElement *fO = static_cast<nsSVGForeignObjectElement*>
(mContent);
float width =
fO->mLengthAttributes[nsSVGForeignObjectElement::WIDTH].GetAnimValue(fO);
float height =
fO->mLengthAttributes[nsSVGForeignObjectElement::HEIGHT].GetAnimValue(fO);
// Clamp height & width to be non-negative (to match UpdateCoveredRegion).
width = NS_MAX(width, 0.0f);
height = NS_MAX(height, 0.0f);
nsSize size(nsPresContext::CSSPixelsToAppUnits(width),
nsPresContext::CSSPixelsToAppUnits(height));
mInReflow = true;
nsHTMLReflowState reflowState(presContext, kid,
renderingContext,
nsSize(size.width, NS_UNCONSTRAINEDSIZE));
nsHTMLReflowMetrics desiredSize;
nsReflowStatus status;
// We don't use size.height above because that tells the child to do
// page/column breaking at that height.
NS_ASSERTION(reflowState.mComputedBorderPadding == nsMargin(0, 0, 0, 0) &&
reflowState.mComputedMargin == nsMargin(0, 0, 0, 0),
"style system should ensure that :-moz-svg-foreign content "
"does not get styled");
NS_ASSERTION(reflowState.ComputedWidth() == size.width,
"reflow state made child wrong size");
reflowState.SetComputedHeight(size.height);
ReflowChild(kid, presContext, desiredSize, reflowState, 0, 0,
NS_FRAME_NO_MOVE_FRAME, status);
NS_ASSERTION(size.width == desiredSize.width &&
size.height == desiredSize.height, "unexpected size");
FinishReflowChild(kid, presContext, &reflowState, desiredSize, 0, 0,
NS_FRAME_NO_MOVE_FRAME);
mInReflow = false;
FlushDirtyRegion(0);
}
NS_IMETHODIMP
nsCanvasFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsresult rv;
if (GetPrevInFlow()) {
DisplayOverflowContainers(aBuilder, aDirtyRect, aLists);
}
// Force a background to be shown. We may have a background propagated to us,
// in which case GetStyleBackground wouldn't have the right background
// and the code in nsFrame::DisplayBorderBackgroundOutline might not give us
// a background.
// We don't have any border or outline, and our background draws over
// the overflow area, so just add nsDisplayCanvasBackground instead of
// calling DisplayBorderBackgroundOutline.
if (IsVisibleForPainting(aBuilder)) {
nsStyleContext* bgSC;
const nsStyleBackground* bg = nullptr;
bool isThemed = IsThemed();
if (!isThemed &&
nsCSSRendering::FindBackground(PresContext(), this, &bgSC)) {
bg = bgSC->GetStyleBackground();
}
aLists.BorderBackground()->AppendNewToTop(
new (aBuilder) nsDisplayCanvasBackgroundColor(aBuilder, this));
if (isThemed) {
return aLists.BorderBackground()->AppendNewToTop(
new (aBuilder) nsDisplayCanvasBackgroundImage(aBuilder, this, 0, isThemed, nullptr));
}
if (!bg) {
return NS_OK;
}
// Create separate items for each background layer.
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) {
if (bg->mLayers[i].mImage.IsEmpty()) {
continue;
}
rv = aLists.BorderBackground()->AppendNewToTop(
new (aBuilder) nsDisplayCanvasBackgroundImage(aBuilder, this, i,
isThemed, bg));
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsIFrame* kid;
for (kid = GetFirstPrincipalChild(); kid; kid = kid->GetNextSibling()) {
// Put our child into its own pseudo-stack.
rv = BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
#ifdef DEBUG_CANVAS_FOCUS
nsCOMPtr<nsIContent> focusContent;
aPresContext->EventStateManager()->
GetFocusedContent(getter_AddRefs(focusContent));
bool hasFocus = false;
nsCOMPtr<nsISupports> container;
aPresContext->GetContainer(getter_AddRefs(container));
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (docShell) {
docShell->GetHasFocus(&hasFocus);
printf("%p - nsCanvasFrame::Paint R:%d,%d,%d,%d DR: %d,%d,%d,%d\n", this,
mRect.x, mRect.y, mRect.width, mRect.height,
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
}
printf("%p - Focus: %s c: %p DoPaint:%s\n", docShell.get(), hasFocus?"Y":"N",
focusContent.get(), mDoPaintFocus?"Y":"N");
#endif
if (!mDoPaintFocus)
return NS_OK;
// Only paint the focus if we're visible
if (!GetStyleVisibility()->IsVisible())
return NS_OK;
return aLists.Outlines()->AppendNewToTop(new (aBuilder)
nsDisplayCanvasFocus(aBuilder, this));
}
NS_IMETHODIMP
nsSVGForeignObjectFrame::PaintSVG(nsRenderingContext *aContext,
const nsIntRect *aDirtyRect)
{
if (IsDisabled())
return NS_OK;
nsIFrame* kid = GetFirstPrincipalChild();
if (!kid)
return NS_OK;
gfxMatrix matrixForChildren = GetCanvasTMForChildren();
gfxMatrix matrix = GetCanvasTM();
if (matrixForChildren.IsSingular()) {
NS_WARNING("Can't render foreignObject element!");
return NS_ERROR_FAILURE;
}
nsRect kidDirtyRect = kid->GetVisualOverflowRect();
/* Check if we need to draw anything. */
if (aDirtyRect) {
// Transform the dirty rect into app units in our userspace.
gfxMatrix invmatrix = matrix;
invmatrix.Invert();
NS_ASSERTION(!invmatrix.IsSingular(),
"inverse of non-singular matrix should be non-singular");
gfxRect transDirtyRect = gfxRect(aDirtyRect->x, aDirtyRect->y,
aDirtyRect->width, aDirtyRect->height);
transDirtyRect = invmatrix.TransformBounds(transDirtyRect);
kidDirtyRect.IntersectRect(kidDirtyRect,
nsLayoutUtils::RoundGfxRectToAppRect(transDirtyRect,
PresContext()->AppUnitsPerCSSPixel()));
// XXX after bug 614732 is fixed, we will compare mRect with aDirtyRect,
// not with kidDirtyRect. I.e.
// PRInt32 appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
// mRect.ToOutsidePixels(appUnitsPerDevPx).Intersects(*aDirtyRect)
if (kidDirtyRect.IsEmpty())
return NS_OK;
}
gfxContext *gfx = aContext->ThebesContext();
gfx->Save();
if (GetStyleDisplay()->IsScrollableOverflow()) {
float x, y, width, height;
static_cast<nsSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
gfxRect clipRect =
nsSVGUtils::GetClipRectForFrame(this, 0.0f, 0.0f, width, height);
nsSVGUtils::SetClipRect(gfx, matrix, clipRect);
}
gfx->Multiply(matrixForChildren);
PRUint32 flags = nsLayoutUtils::PAINT_IN_TRANSFORM;
if (SVGAutoRenderState::IsPaintingToWindow(aContext)) {
flags |= nsLayoutUtils::PAINT_TO_WINDOW;
}
nsresult rv = nsLayoutUtils::PaintFrame(aContext, kid, nsRegion(kidDirtyRect),
NS_RGBA(0,0,0,0), flags);
gfx->Restore();
return rv;
}
NS_IMETHODIMP
nsMathMLmfencedFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv;
aDesiredSize.width = aDesiredSize.height = 0;
aDesiredSize.ascent = 0;
aDesiredSize.mBoundingMetrics = nsBoundingMetrics();
int32_t i;
const nsStyleFont* font = GetStyleFont();
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aReflowState.rendContext->SetFont(fm);
nscoord axisHeight, em;
GetAxisHeight(*aReflowState.rendContext, fm, axisHeight);
GetEmHeight(fm, em);
// leading to be left at the top and the bottom of stretched chars
nscoord leading = NSToCoordRound(0.2f * em);
/////////////
// Reflow children
// Asking each child to cache its bounding metrics
// Note that we don't use the base method nsMathMLContainerFrame::Reflow()
// because we want to stretch our fences, separators and stretchy frames using
// the *same* initial aDesiredSize.mBoundingMetrics. If we were to use the base
// method here, our stretchy frames will be stretched and placed, and we may
// end up stretching our fences/separators with a different aDesiredSize.
// XXX The above decision was revisited in bug 121748 and this code can be
// refactored to use nsMathMLContainerFrame::Reflow() at some stage.
nsReflowStatus childStatus;
nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
nsIFrame* firstChild = GetFirstPrincipalChild();
nsIFrame* childFrame = firstChild;
nscoord ascent = 0, descent = 0;
if (firstChild || mOpenChar || mCloseChar || mSeparatorsCount > 0) {
// We use the ASCII metrics to get our minimum height. This way,
// if we have borders or a background, they will fit better with
// other elements on the line.
ascent = fm->MaxAscent();
descent = fm->MaxDescent();
}
while (childFrame) {
nsHTMLReflowMetrics childDesiredSize(aDesiredSize.mFlags
| NS_REFLOW_CALC_BOUNDING_METRICS);
nsHTMLReflowState childReflowState(aPresContext, aReflowState,
childFrame, availSize);
rv = ReflowChild(childFrame, aPresContext, childDesiredSize,
childReflowState, childStatus);
//NS_ASSERTION(NS_FRAME_IS_COMPLETE(childStatus), "bad status");
if (NS_FAILED(rv)) {
// Call DidReflow() for the child frames we successfully did reflow.
DidReflowChildren(firstChild, childFrame);
return rv;
}
SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
childDesiredSize.mBoundingMetrics);
nscoord childDescent = childDesiredSize.height - childDesiredSize.ascent;
if (descent < childDescent)
descent = childDescent;
if (ascent < childDesiredSize.ascent)
ascent = childDesiredSize.ascent;
childFrame = childFrame->GetNextSibling();
}
/////////////
// Ask stretchy children to stretch themselves
nsBoundingMetrics containerSize;
nsStretchDirection stretchDir = NS_STRETCH_DIRECTION_VERTICAL;
GetPreferredStretchSize(*aReflowState.rendContext,
0, /* i.e., without embellishments */
stretchDir, containerSize);
childFrame = firstChild;
while (childFrame) {
nsIMathMLFrame* mathmlChild = do_QueryFrame(childFrame);
if (mathmlChild) {
nsHTMLReflowMetrics childDesiredSize;
// retrieve the metrics that was stored at the previous pass
GetReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
childDesiredSize.mBoundingMetrics);
mathmlChild->Stretch(*aReflowState.rendContext,
stretchDir, containerSize, childDesiredSize);
// store the updated metrics
SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
childDesiredSize.mBoundingMetrics);
nscoord childDescent = childDesiredSize.height - childDesiredSize.ascent;
if (descent < childDescent)
descent = childDescent;
if (ascent < childDesiredSize.ascent)
ascent = childDesiredSize.ascent;
}
childFrame = childFrame->GetNextSibling();
}
// bug 121748: for surrounding fences & separators, use a size that covers everything
GetPreferredStretchSize(*aReflowState.rendContext,
STRETCH_CONSIDER_EMBELLISHMENTS,
stretchDir, containerSize);
//////////////////////////////////////////
// Prepare the opening fence, separators, and closing fence, and
// adjust the origin of children.
// we need to center around the axis
nscoord delta = std::max(containerSize.ascent - axisHeight,
containerSize.descent + axisHeight);
containerSize.ascent = delta + axisHeight;
containerSize.descent = delta - axisHeight;
bool isRTL = NS_MATHML_IS_RTL(mPresentationData.flags);
/////////////////
// opening fence ...
ReflowChar(aPresContext, *aReflowState.rendContext, mOpenChar,
NS_MATHML_OPERATOR_FORM_PREFIX, font->mScriptLevel,
axisHeight, leading, em, containerSize, ascent, descent, isRTL);
/////////////////
// separators ...
for (i = 0; i < mSeparatorsCount; i++) {
ReflowChar(aPresContext, *aReflowState.rendContext, &mSeparatorsChar[i],
NS_MATHML_OPERATOR_FORM_INFIX, font->mScriptLevel,
axisHeight, leading, em, containerSize, ascent, descent, isRTL);
}
/////////////////
// closing fence ...
ReflowChar(aPresContext, *aReflowState.rendContext, mCloseChar,
NS_MATHML_OPERATOR_FORM_POSTFIX, font->mScriptLevel,
axisHeight, leading, em, containerSize, ascent, descent, isRTL);
//////////////////
// Adjust the origins of each child.
// and update our bounding metrics
i = 0;
nscoord dx = 0;
nsBoundingMetrics bm;
bool firstTime = true;
nsMathMLChar *leftChar, *rightChar;
if (isRTL) {
leftChar = mCloseChar;
rightChar = mOpenChar;
} else {
leftChar = mOpenChar;
rightChar = mCloseChar;
}
if (leftChar) {
PlaceChar(leftChar, ascent, bm, dx);
aDesiredSize.mBoundingMetrics = bm;
firstTime = false;
}
if (isRTL) {
childFrame = this->GetLastChild(nsIFrame::kPrincipalList);
} else {
childFrame = firstChild;
}
while (childFrame) {
nsHTMLReflowMetrics childSize;
GetReflowAndBoundingMetricsFor(childFrame, childSize, bm);
if (firstTime) {
firstTime = false;
aDesiredSize.mBoundingMetrics = bm;
}
else
aDesiredSize.mBoundingMetrics += bm;
FinishReflowChild(childFrame, aPresContext, nullptr, childSize,
dx, ascent - childSize.ascent, 0);
dx += childSize.width;
if (i < mSeparatorsCount) {
PlaceChar(&mSeparatorsChar[isRTL ? mSeparatorsCount - 1 - i : i],
ascent, bm, dx);
aDesiredSize.mBoundingMetrics += bm;
}
i++;
if (isRTL) {
childFrame = childFrame->GetPrevSibling();
} else {
childFrame = childFrame->GetNextSibling();
}
}
if (rightChar) {
PlaceChar(rightChar, ascent, bm, dx);
if (firstTime)
aDesiredSize.mBoundingMetrics = bm;
else
aDesiredSize.mBoundingMetrics += bm;
}
aDesiredSize.width = aDesiredSize.mBoundingMetrics.width;
aDesiredSize.height = ascent + descent;
aDesiredSize.ascent = ascent;
SetBoundingMetrics(aDesiredSize.mBoundingMetrics);
SetReference(nsPoint(0, aDesiredSize.ascent));
// see if we should fix the spacing
FixInterFrameSpacing(aDesiredSize);
// Finished with these:
ClearSavedChildMetrics();
// Set our overflow area
GatherAndStoreOverflow(&aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
/* virtual */ nsresult
nsMathMLmencloseFrame::PlaceInternal(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize,
bool aWidthOnly)
{
///////////////
// Measure the size of our content using the base class to format like an
// inferred mrow.
nsHTMLReflowMetrics baseSize;
nsresult rv =
nsMathMLContainerFrame::Place(aRenderingContext, false, baseSize);
if (NS_MATHML_HAS_ERROR(mPresentationData.flags) || NS_FAILED(rv)) {
DidReflowChildren(GetFirstPrincipalChild());
return rv;
}
nsBoundingMetrics bmBase = baseSize.mBoundingMetrics;
nscoord dx_left = 0, dx_right = 0;
nsBoundingMetrics bmLongdivChar, bmRadicalChar;
nscoord radicalAscent = 0, radicalDescent = 0;
nscoord longdivAscent = 0, longdivDescent = 0;
nscoord psi = 0;
///////////////
// Thickness of bars and font metrics
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
nscoord mEmHeight;
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aRenderingContext.SetFont(fm);
GetRuleThickness(aRenderingContext, fm, mRuleThickness);
GetEmHeight(fm, mEmHeight);
PRUnichar one = '1';
nsBoundingMetrics bmOne = aRenderingContext.GetBoundingMetrics(&one, 1);
///////////////
// General rules: the menclose element takes the size of the enclosed content.
// We add a padding when needed.
// determine padding & psi
nscoord padding = 3 * mRuleThickness;
nscoord delta = padding % onePixel;
if (delta)
padding += onePixel - delta; // round up
if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
nscoord phi;
// Rule 11, App. G, TeXbook
// psi = clearance between rule and content
if (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags))
phi = fm->XHeight();
else
phi = mRuleThickness;
psi = mRuleThickness + phi / 4;
delta = psi % onePixel;
if (delta)
psi += onePixel - delta; // round up
}
if (mRuleThickness < onePixel)
mRuleThickness = onePixel;
// Set horizontal parameters
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_CIRCLE))
dx_left = padding;
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_CIRCLE))
dx_right = padding;
// Set vertical parameters
if (IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
IsToDraw(NOTATION_VERTICALSTRIKE) ||
IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_RADICAL) ||
IsToDraw(NOTATION_LONGDIV)) {
// set a minimal value for the base height
bmBase.ascent = NS_MAX(bmOne.ascent, bmBase.ascent);
bmBase.descent = NS_MAX(0, bmBase.descent);
}
mBoundingMetrics.ascent = bmBase.ascent;
mBoundingMetrics.descent = bmBase.descent;
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_CIRCLE))
mBoundingMetrics.ascent += padding;
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_CIRCLE))
mBoundingMetrics.descent += padding;
///////////////
// circle notation: we don't want the ellipse to overlap the enclosed
// content. Hence, we need to increase the size of the bounding box by a
// factor of at least sqrt(2).
if (IsToDraw(NOTATION_CIRCLE)) {
double ratio = (sqrt(2.0) - 1.0) / 2.0;
nscoord padding2;
// Update horizontal parameters
padding2 = ratio * bmBase.width;
dx_left = NS_MAX(dx_left, padding2);
dx_right = NS_MAX(dx_right, padding2);
// Update vertical parameters
padding2 = ratio * (bmBase.ascent + bmBase.descent);
mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
bmBase.ascent + padding2);
mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
bmBase.descent + padding2);
}
///////////////
// longdiv notation:
if (IsToDraw(NOTATION_LONGDIV)) {
if (aWidthOnly) {
nscoord longdiv_width = mMathMLChar[mLongDivCharIndex].
GetMaxWidth(PresContext(), aRenderingContext);
// Update horizontal parameters
dx_left = NS_MAX(dx_left, longdiv_width);
} else {
// Stretch the parenthesis to the appropriate height if it is not
// big enough.
nsBoundingMetrics contSize = bmBase;
contSize.ascent = mRuleThickness;
contSize.descent = bmBase.ascent + bmBase.descent + psi;
// height(longdiv) should be >= height(base) + psi + mRuleThickness
mMathMLChar[mLongDivCharIndex].Stretch(PresContext(), aRenderingContext,
NS_STRETCH_DIRECTION_VERTICAL,
contSize, bmLongdivChar,
NS_STRETCH_LARGER, false);
mMathMLChar[mLongDivCharIndex].GetBoundingMetrics(bmLongdivChar);
// Update horizontal parameters
dx_left = NS_MAX(dx_left, bmLongdivChar.width);
// Update vertical parameters
longdivAscent = bmBase.ascent + psi + mRuleThickness;
longdivDescent = NS_MAX(bmBase.descent,
(bmLongdivChar.ascent + bmLongdivChar.descent -
longdivAscent));
mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
longdivAscent);
mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
longdivDescent);
}
}
///////////////
// radical notation:
if (IsToDraw(NOTATION_RADICAL)) {
nscoord *dx_leading =
NS_MATHML_IS_RTL(mPresentationData.flags) ? &dx_right : &dx_left;
if (aWidthOnly) {
nscoord radical_width = mMathMLChar[mRadicalCharIndex].
GetMaxWidth(PresContext(), aRenderingContext);
// Update horizontal parameters
*dx_leading = NS_MAX(*dx_leading, radical_width);
} else {
// Stretch the radical symbol to the appropriate height if it is not
// big enough.
nsBoundingMetrics contSize = bmBase;
contSize.ascent = mRuleThickness;
contSize.descent = bmBase.ascent + bmBase.descent + psi;
// height(radical) should be >= height(base) + psi + mRuleThickness
mMathMLChar[mRadicalCharIndex].Stretch(PresContext(), aRenderingContext,
NS_STRETCH_DIRECTION_VERTICAL,
contSize, bmRadicalChar,
NS_STRETCH_LARGER,
NS_MATHML_IS_RTL(mPresentationData.flags));
mMathMLChar[mRadicalCharIndex].GetBoundingMetrics(bmRadicalChar);
// Update horizontal parameters
*dx_leading = NS_MAX(*dx_leading, bmRadicalChar.width);
// Update vertical parameters
radicalAscent = bmBase.ascent + psi + mRuleThickness;
radicalDescent = NS_MAX(bmBase.descent,
(bmRadicalChar.ascent + bmRadicalChar.descent -
radicalAscent));
mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
radicalAscent);
mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
radicalDescent);
}
}
///////////////
//
if (IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX) ||
(IsToDraw(NOTATION_LEFT) && IsToDraw(NOTATION_RIGHT))) {
// center the menclose around the content (horizontally)
dx_left = dx_right = NS_MAX(dx_left, dx_right);
}
///////////////
// The maximum size is now computed: set the remaining parameters
mBoundingMetrics.width = dx_left + bmBase.width + dx_right;
mBoundingMetrics.leftBearing = NS_MIN(0, dx_left + bmBase.leftBearing);
mBoundingMetrics.rightBearing =
NS_MAX(mBoundingMetrics.width, dx_left + bmBase.rightBearing);
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.ascent = NS_MAX(mBoundingMetrics.ascent, baseSize.ascent);
aDesiredSize.height = aDesiredSize.ascent +
NS_MAX(mBoundingMetrics.descent, baseSize.height - baseSize.ascent);
if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
// get the leading to be left at the top of the resulting frame
// this seems more reliable than using fm->GetLeading() on suspicious
// fonts
nscoord leading = nscoord(0.2f * mEmHeight);
nscoord desiredSizeAscent = aDesiredSize.ascent;
nscoord desiredSizeDescent = aDesiredSize.height - aDesiredSize.ascent;
if (IsToDraw(NOTATION_LONGDIV)) {
desiredSizeAscent = NS_MAX(desiredSizeAscent,
longdivAscent + leading);
desiredSizeDescent = NS_MAX(desiredSizeDescent,
longdivDescent + mRuleThickness);
}
if (IsToDraw(NOTATION_RADICAL)) {
desiredSizeAscent = NS_MAX(desiredSizeAscent,
radicalAscent + leading);
desiredSizeDescent = NS_MAX(desiredSizeDescent,
radicalDescent + mRuleThickness);
}
aDesiredSize.ascent = desiredSizeAscent;
aDesiredSize.height = desiredSizeAscent + desiredSizeDescent;
}
if (IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX) ||
(IsToDraw(NOTATION_TOP) && IsToDraw(NOTATION_BOTTOM))) {
// center the menclose around the content (vertically)
nscoord dy = NS_MAX(aDesiredSize.ascent - bmBase.ascent,
aDesiredSize.height - aDesiredSize.ascent -
bmBase.descent);
aDesiredSize.ascent = bmBase.ascent + dy;
aDesiredSize.height = aDesiredSize.ascent + bmBase.descent + dy;
}
// Update mBoundingMetrics ascent/descent
if (IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
IsToDraw(NOTATION_VERTICALSTRIKE) ||
IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX))
mBoundingMetrics.ascent = aDesiredSize.ascent;
if (IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
IsToDraw(NOTATION_VERTICALSTRIKE) ||
IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX))
mBoundingMetrics.descent = aDesiredSize.height - aDesiredSize.ascent;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
if (aPlaceOrigin) {
//////////////////
// Set position and size of MathMLChars
if (IsToDraw(NOTATION_LONGDIV))
mMathMLChar[mLongDivCharIndex].SetRect(nsRect(dx_left -
bmLongdivChar.width,
aDesiredSize.ascent -
longdivAscent,
bmLongdivChar.width,
bmLongdivChar.ascent +
bmLongdivChar.descent));
if (IsToDraw(NOTATION_RADICAL)) {
nscoord dx = NS_MATHML_IS_RTL(mPresentationData.flags) ?
dx_left + bmBase.width : dx_left - bmRadicalChar.width;
mMathMLChar[mRadicalCharIndex].SetRect(nsRect(dx,
aDesiredSize.ascent -
radicalAscent,
bmRadicalChar.width,
bmRadicalChar.ascent +
bmRadicalChar.descent));
}
mContentWidth = bmBase.width;
//////////////////
// Finish reflowing child frames
PositionRowChildFrames(dx_left, aDesiredSize.ascent);
}
return NS_OK;
}
nsresult
nsTextControlFrame::CalcIntrinsicSize(nsRenderingContext* aRenderingContext,
nsSize& aIntrinsicSize,
float aFontSizeInflation)
{
// Get leading and the Average/MaxAdvance char width
nscoord lineHeight = 0;
nscoord charWidth = 0;
nscoord charMaxAdvance = 0;
nsRefPtr<nsFontMetrics> fontMet;
nsresult rv =
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet),
aFontSizeInflation);
NS_ENSURE_SUCCESS(rv, rv);
aRenderingContext->SetFont(fontMet);
lineHeight =
nsHTMLReflowState::CalcLineHeight(GetStyleContext(), NS_AUTOHEIGHT,
aFontSizeInflation);
charWidth = fontMet->AveCharWidth();
charMaxAdvance = fontMet->MaxAdvance();
// Set the width equal to the width in characters
PRInt32 cols = GetCols();
aIntrinsicSize.width = cols * charWidth;
// To better match IE, take the maximum character width(in twips) and remove
// 4 pixels add this on as additional padding(internalPadding). But only do
// this if charMaxAdvance != charWidth; if they are equal, this is almost
// certainly a fixed-width font.
if (charWidth != charMaxAdvance) {
nscoord internalPadding = NS_MAX(0, charMaxAdvance -
nsPresContext::CSSPixelsToAppUnits(4));
nscoord t = nsPresContext::CSSPixelsToAppUnits(1);
// Round to a multiple of t
nscoord rest = internalPadding % t;
if (rest < t - rest) {
internalPadding -= rest;
} else {
internalPadding += t - rest;
}
// Now add the extra padding on (so that small input sizes work well)
aIntrinsicSize.width += internalPadding;
} else {
// This is to account for the anonymous <br> having a 1 twip width
// in Full Standards mode, see BRFrame::Reflow and bug 228752.
if (PresContext()->CompatibilityMode() == eCompatibility_FullStandards) {
aIntrinsicSize.width += 1;
}
// Also add in the padding of our value div child. Note that it hasn't
// been reflowed yet, so we can't get its used padding, but it shouldn't be
// using percentage padding anyway.
nsMargin childPadding;
nsIFrame* firstChild = GetFirstPrincipalChild();
if (firstChild && firstChild->GetStylePadding()->GetPadding(childPadding)) {
aIntrinsicSize.width += childPadding.LeftRight();
} else {
NS_ERROR("Percentage padding on value div?");
}
}
// Increment width with cols * letter-spacing.
{
const nsStyleCoord& lsCoord = GetStyleText()->mLetterSpacing;
if (eStyleUnit_Coord == lsCoord.GetUnit()) {
nscoord letterSpacing = lsCoord.GetCoordValue();
if (letterSpacing != 0) {
aIntrinsicSize.width += cols * letterSpacing;
}
}
}
// Set the height equal to total number of rows (times the height of each
// line, of course)
aIntrinsicSize.height = lineHeight * GetRows();
// Add in the size of the scrollbars for textarea
if (IsTextArea()) {
nsIFrame* first = GetFirstPrincipalChild();
nsIScrollableFrame *scrollableFrame = do_QueryFrame(first);
NS_ASSERTION(scrollableFrame, "Child must be scrollable");
if (scrollableFrame) {
nsMargin scrollbarSizes =
scrollableFrame->GetDesiredScrollbarSizes(PresContext(), aRenderingContext);
aIntrinsicSize.width += scrollbarSizes.LeftRight();
aIntrinsicSize.height += scrollbarSizes.TopBottom();;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsSVGForeignObjectFrame::PaintSVG(nsSVGRenderState *aContext,
const nsIntRect *aDirtyRect)
{
NS_ABORT_IF_FALSE(aDirtyRect, "We expect aDirtyRect to be non-null");
if (IsDisabled())
return NS_OK;
nsIFrame* kid = GetFirstPrincipalChild();
if (!kid)
return NS_OK;
gfxMatrix matrixForChildren = GetCanvasTMForChildren();
gfxMatrix matrix = GetCanvasTM();
nsRenderingContext *ctx = aContext->GetRenderingContext(this);
if (!ctx || matrixForChildren.IsSingular()) {
NS_WARNING("Can't render foreignObject element!");
return NS_ERROR_FAILURE;
}
/* Check if we need to draw anything. */
PRInt32 appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
if (!mRect.ToOutsidePixels(appUnitsPerDevPx).Intersects(*aDirtyRect))
return NS_OK;
gfxContext *gfx = aContext->GetGfxContext();
gfx->Save();
if (GetStyleDisplay()->IsScrollableOverflow()) {
float x, y, width, height;
static_cast<nsSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
gfxRect clipRect =
nsSVGUtils::GetClipRectForFrame(this, 0.0f, 0.0f, width, height);
nsSVGUtils::SetClipRect(gfx, matrix, clipRect);
}
gfx->Multiply(matrixForChildren);
// Transform the dirty rect into the rectangle containing the
// transformed dirty rect.
gfxMatrix invmatrix = matrix.Invert();
NS_ASSERTION(!invmatrix.IsSingular(),
"inverse of non-singular matrix should be non-singular");
gfxRect transDirtyRect = gfxRect(aDirtyRect->x, aDirtyRect->y,
aDirtyRect->width, aDirtyRect->height);
transDirtyRect = invmatrix.TransformBounds(transDirtyRect);
transDirtyRect.Scale(nsPresContext::AppUnitsPerCSSPixel());
nsPoint tl(NSToCoordFloor(transDirtyRect.X()),
NSToCoordFloor(transDirtyRect.Y()));
nsPoint br(NSToCoordCeil(transDirtyRect.XMost()),
NSToCoordCeil(transDirtyRect.YMost()));
nsRect kidDirtyRect(tl.x, tl.y, br.x - tl.x, br.y - tl.y);
kidDirtyRect.IntersectRect(kidDirtyRect, kid->GetRect());
PRUint32 flags = nsLayoutUtils::PAINT_IN_TRANSFORM;
if (aContext->IsPaintingToWindow()) {
flags |= nsLayoutUtils::PAINT_TO_WINDOW;
}
nsresult rv = nsLayoutUtils::PaintFrame(ctx, kid, nsRegion(kidDirtyRect),
NS_RGBA(0,0,0,0), flags);
gfx->Restore();
return rv;
}