Exemplo n.º 1
0
NS_IMETHODIMP
nsSVGForeignObjectFrame::Reflow(nsPresContext*           aPresContext,
                                nsHTMLReflowMetrics&     aDesiredSize,
                                const nsHTMLReflowState& aReflowState,
                                nsReflowStatus&          aStatus)
{
  NS_ABORT_IF_FALSE(!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD),
                    "Should not have been called");

  // Only InvalidateAndScheduleBoundsUpdate marks us with NS_FRAME_IS_DIRTY,
  // so if that bit is still set we still have a resize pending. If we hit
  // this assertion, then we should get the presShell to skip reflow roots
  // that have a dirty parent since a reflow is going to come via the
  // reflow root's parent anyway.
  NS_ASSERTION(!(GetStateBits() & NS_FRAME_IS_DIRTY),
               "Reflowing while a resize is pending is wasteful");

  // UpdateBounds makes sure mRect is up to date before we're called.

  NS_ASSERTION(!aReflowState.parentReflowState,
               "should only get reflow from being reflow root");
  NS_ASSERTION(aReflowState.ComputedWidth() == GetSize().width &&
               aReflowState.ComputedHeight() == GetSize().height,
               "reflow roots should be reflowed at existing size and "
               "svg.css should ensure we have no padding/border/margin");

  DoReflow();

  aDesiredSize.width = aReflowState.ComputedWidth();
  aDesiredSize.height = aReflowState.ComputedHeight();
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  aStatus = NS_FRAME_COMPLETE;

  return NS_OK;
}
Exemplo n.º 2
0
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 = GetFirstChild(nsnull);

  // 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();
}
Exemplo n.º 3
0
NS_IMETHODIMP
nsSVGForeignObjectFrame::Reflow(nsPresContext*           aPresContext,
                                nsHTMLReflowMetrics&     aDesiredSize,
                                const nsHTMLReflowState& aReflowState,
                                nsReflowStatus&          aStatus)
{
  // InitialUpdate and AttributeChanged make sure mRect is up to date before
  // we're called (UpdateCoveredRegion sets mRect).

  NS_ASSERTION(!aReflowState.parentReflowState,
               "should only get reflow from being reflow root");
  NS_ASSERTION(aReflowState.ComputedWidth() == GetSize().width &&
               aReflowState.ComputedHeight() == GetSize().height,
               "reflow roots should be reflowed at existing size and "
               "svg.css should ensure we have no padding/border/margin");

  DoReflow();

  aDesiredSize.width = aReflowState.ComputedWidth();
  aDesiredSize.height = aReflowState.ComputedHeight();
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  aStatus = NS_FRAME_COMPLETE;

  return NS_OK;
}
Exemplo n.º 4
0
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);
  }
}
Exemplo n.º 5
0
NS_IMETHODIMP
nsLeafFrame::Reflow(nsPresContext* aPresContext,
                    nsHTMLReflowMetrics& aMetrics,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus& aStatus)
{
    NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                   ("enter nsLeafFrame::Reflow: aMaxSize=%d,%d",
                    aReflowState.availableWidth, aReflowState.availableHeight));

    NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");

    DoReflow(aPresContext, aMetrics, aReflowState, aStatus);

    FinishAndStoreOverflow(&aMetrics);
    return NS_OK;
}
Exemplo n.º 6
0
NS_IMETHODIMP nsImageLoader::OnStopRequest(imgIRequest *aRequest,
                                           bool aLastPart)
{
  if (!mFrame)
    return NS_ERROR_FAILURE;

  if (!mRequest) {
    // We're in the middle of a paint anyway
    return NS_OK;
  }

  // Take requested actions
  if (mActions & ACTION_REFLOW_ON_LOAD) {
    DoReflow();
  }
  if (mActions & ACTION_REDRAW_ON_LOAD) {
    DoRedraw(nsnull);
  }
  return NS_OK;
}
Exemplo n.º 7
0
NS_IMETHODIMP
nsSVGForeignObjectFrame::InitialUpdate()
{
  NS_ASSERTION(GetStateBits() & NS_FRAME_FIRST_REFLOW,
               "Yikes! We've been called already! Hopefully we weren't called "
               "before our nsSVGOuterSVGFrame's initial Reflow()!!!");

  UpdateCoveredRegion();

  // Make sure to not allow interrupts if we're not being reflown as a root
  nsPresContext::InterruptPreventer noInterrupts(PresContext());
  DoReflow();

  NS_ASSERTION(!(mState & NS_FRAME_IN_REFLOW),
               "We don't actually participate in reflow");
  
  // Do unset the various reflow bits, though.
  mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
              NS_FRAME_HAS_DIRTY_CHILDREN);

  return NS_OK;
}