diff options
Diffstat (limited to 'layout/svg/SVGForeignObjectFrame.cpp')
| -rw-r--r-- | layout/svg/SVGForeignObjectFrame.cpp | 451 |
1 files changed, 451 insertions, 0 deletions
diff --git a/layout/svg/SVGForeignObjectFrame.cpp b/layout/svg/SVGForeignObjectFrame.cpp new file mode 100644 index 0000000000..576d6a1367 --- /dev/null +++ b/layout/svg/SVGForeignObjectFrame.cpp @@ -0,0 +1,451 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Main header first: +#include "SVGForeignObjectFrame.h" + +// Keep others in (case-insensitive) order: +#include "ImgDrawResult.h" +#include "gfxContext.h" +#include "mozilla/AutoRestore.h" +#include "mozilla/PresShell.h" +#include "mozilla/SVGContainerFrame.h" +#include "mozilla/SVGObserverUtils.h" +#include "mozilla/SVGUtils.h" +#include "mozilla/dom/SVGForeignObjectElement.h" +#include "nsDisplayList.h" +#include "nsGkAtoms.h" +#include "nsNameSpaceManager.h" +#include "nsLayoutUtils.h" +#include "nsRegion.h" +#include "SVGGeometryProperty.h" + +using namespace mozilla::dom; +using namespace mozilla::image; +namespace SVGT = SVGGeometryProperty::Tags; + +//---------------------------------------------------------------------- +// Implementation + +nsContainerFrame* NS_NewSVGForeignObjectFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle) { + return new (aPresShell) + mozilla::SVGForeignObjectFrame(aStyle, aPresShell->GetPresContext()); +} + +namespace mozilla { + +NS_IMPL_FRAMEARENA_HELPERS(SVGForeignObjectFrame) + +SVGForeignObjectFrame::SVGForeignObjectFrame(ComputedStyle* aStyle, + nsPresContext* aPresContext) + : nsContainerFrame(aStyle, aPresContext, kClassID), mInReflow(false) { + AddStateBits(NS_FRAME_REFLOW_ROOT | NS_FRAME_MAY_BE_TRANSFORMED | + NS_FRAME_SVG_LAYOUT | NS_FRAME_FONT_INFLATION_CONTAINER | + NS_FRAME_FONT_INFLATION_FLOW_ROOT); +} + +//---------------------------------------------------------------------- +// nsIFrame methods + +NS_QUERYFRAME_HEAD(SVGForeignObjectFrame) + NS_QUERYFRAME_ENTRY(ISVGDisplayableFrame) +NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame) + +void SVGForeignObjectFrame::Init(nsIContent* aContent, + nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) { + NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::foreignObject), + "Content is not an SVG foreignObject!"); + + nsContainerFrame::Init(aContent, aParent, aPrevInFlow); + AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD); +} + +nsresult SVGForeignObjectFrame::AttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType) { + if (aNameSpaceID == kNameSpaceID_None) { + if (aAttribute == nsGkAtoms::transform) { + // We don't invalidate for transform changes (the layers code does that). + // Also note that SVGTransformableElement::GetAttributeChangeHint will + // return nsChangeHint_UpdateOverflow for "transform" attribute changes + // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call. + mCanvasTM = nullptr; + } else if (aAttribute == nsGkAtoms::viewBox || + aAttribute == nsGkAtoms::preserveAspectRatio) { + nsLayoutUtils::PostRestyleEvent( + mContent->AsElement(), RestyleHint{0}, + nsChangeHint_InvalidateRenderingObservers); + } + } + + return NS_OK; +} + +void SVGForeignObjectFrame::DidSetComputedStyle( + ComputedStyle* aOldComputedStyle) { + nsContainerFrame::DidSetComputedStyle(aOldComputedStyle); + + if (aOldComputedStyle) { + if (StyleSVGReset()->mX != aOldComputedStyle->StyleSVGReset()->mX || + StyleSVGReset()->mY != aOldComputedStyle->StyleSVGReset()->mY) { + // Invalidate cached transform matrix. + mCanvasTM = nullptr; + SVGUtils::ScheduleReflowSVG(this); + } + } +} + +void SVGForeignObjectFrame::Reflow(nsPresContext* aPresContext, + ReflowOutput& aDesiredSize, + const ReflowInput& aReflowInput, + nsReflowStatus& aStatus) { + MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!"); + MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "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(!HasAnyStateBits(NS_FRAME_IS_DIRTY), + "Reflowing while a resize is pending is wasteful"); + + // ReflowSVG makes sure mRect is up to date before we're called. + + NS_ASSERTION(!aReflowInput.mParentReflowInput, + "should only get reflow from being reflow root"); + NS_ASSERTION(aReflowInput.ComputedWidth() == GetSize().width && + aReflowInput.ComputedHeight() == GetSize().height, + "reflow roots should be reflowed at existing size and " + "svg.css should ensure we have no padding/border/margin"); + + DoReflow(); + + WritingMode wm = aReflowInput.GetWritingMode(); + LogicalSize finalSize(wm, aReflowInput.ComputedISize(), + aReflowInput.ComputedBSize()); + aDesiredSize.SetSize(wm, finalSize); + aDesiredSize.SetOverflowAreasToDesiredBounds(); +} + +void SVGForeignObjectFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) { + if (!static_cast<const SVGElement*>(GetContent())->HasValidDimensions()) { + return; + } + nsDisplayList newList(aBuilder); + nsDisplayListSet set(&newList, &newList, &newList, &newList, &newList, + &newList); + DisplayOutline(aBuilder, set); + BuildDisplayListForNonBlockChildren(aBuilder, set); + aLists.Content()->AppendNewToTop<nsDisplayForeignObject>(aBuilder, this, + &newList); +} + +bool SVGForeignObjectFrame::IsSVGTransformed( + Matrix* aOwnTransform, Matrix* aFromParentTransform) const { + return SVGUtils::IsSVGTransformed(this, aOwnTransform, aFromParentTransform); +} + +void SVGForeignObjectFrame::PaintSVG(gfxContext& aContext, + const gfxMatrix& aTransform, + imgDrawingParams& aImgParams) { + NS_ASSERTION(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "Only painting of non-display SVG should take this code path"); + + if (IsDisabled()) { + return; + } + + nsIFrame* kid = PrincipalChildList().FirstChild(); + if (!kid) { + return; + } + + if (aTransform.IsSingular()) { + NS_WARNING("Can't render foreignObject element!"); + return; + } + + gfxClipAutoSaveRestore autoSaveClip(&aContext); + + if (StyleDisplay()->IsScrollableOverflow()) { + float x, y, width, height; + SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, + SVGT::Height>( + static_cast<SVGElement*>(GetContent()), &x, &y, &width, &height); + + gfxRect clipRect = + SVGUtils::GetClipRectForFrame(this, 0.0f, 0.0f, width, height); + autoSaveClip.TransformedClip(aTransform, clipRect); + } + + // SVG paints in CSS px, but normally frames paint in dev pixels. Here we + // multiply a CSS-px-to-dev-pixel factor onto aTransform so our children + // paint correctly. + float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( + PresContext()->AppUnitsPerDevPixel()); + gfxMatrix canvasTMForChildren = aTransform; + canvasTMForChildren.PreScale(cssPxPerDevPx, cssPxPerDevPx); + + aContext.Multiply(canvasTMForChildren); + + using PaintFrameFlags = nsLayoutUtils::PaintFrameFlags; + PaintFrameFlags flags = PaintFrameFlags::InTransform; + if (SVGAutoRenderState::IsPaintingToWindow(aContext.GetDrawTarget())) { + flags |= PaintFrameFlags::ToWindow; + } + if (aImgParams.imageFlags & imgIContainer::FLAG_SYNC_DECODE) { + flags |= PaintFrameFlags::SyncDecodeImages; + } + if (aImgParams.imageFlags & imgIContainer::FLAG_HIGH_QUALITY_SCALING) { + flags |= PaintFrameFlags::UseHighQualityScaling; + } + nsLayoutUtils::PaintFrame(&aContext, kid, nsRegion(kid->InkOverflowRect()), + NS_RGBA(0, 0, 0, 0), + nsDisplayListBuilderMode::Painting, flags); +} + +nsIFrame* SVGForeignObjectFrame::GetFrameForPoint(const gfxPoint& aPoint) { + MOZ_ASSERT_UNREACHABLE( + "A clipPath cannot contain an SVGForeignObject element"); + return nullptr; +} + +void SVGForeignObjectFrame::ReflowSVG() { + NS_ASSERTION(SVGUtils::OuterSVGIsCallingReflowSVG(this), + "This call is probably a wasteful mistake"); + + MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY), + "ReflowSVG mechanism not designed for this"); + + if (!SVGUtils::NeedsReflowSVG(this)) { + return; + } + + // We update mRect before the DoReflow call so that DoReflow uses the + // correct dimensions: + + float x, y, w, h; + SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>( + static_cast<SVGElement*>(GetContent()), &x, &y, &w, &h); + + // 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; + + mRect = nsLayoutUtils::RoundGfxRectToAppRect(gfxRect(x, y, w, h), + AppUnitsPerCSSPixel()); + + // 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 = PrincipalChildList().FirstChild(); + kid->MarkSubtreeDirty(); + + // Make sure to not allow interrupts if we're not being reflown as a root: + nsPresContext::InterruptPreventer noInterrupts(PresContext()); + + DoReflow(); + + if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { + // Make sure we have our filter property (if any) before calling + // FinishAndStoreOverflow (subsequent filter changes are handled off + // nsChangeHint_UpdateEffects): + SVGObserverUtils::UpdateEffects(this); + } + + // If we have a filter, we need to invalidate ourselves because filter + // output can change even if none of our descendants need repainting. + if (StyleEffects()->HasFilters()) { + InvalidateFrame(); + } + + auto* anonKid = PrincipalChildList().FirstChild(); + nsRect overflow = anonKid->InkOverflowRect(); + + OverflowAreas overflowAreas(overflow, overflow); + FinishAndStoreOverflow(overflowAreas, mRect.Size()); + + // Now unset the various reflow bits: + RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY | + NS_FRAME_HAS_DIRTY_CHILDREN); +} + +void SVGForeignObjectFrame::NotifySVGChanged(uint32_t aFlags) { + MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED), + "Invalidation logic may need adjusting"); + + bool needNewBounds = false; // i.e. mRect or ink overflow rect + bool needReflow = false; + bool needNewCanvasTM = false; + + if (aFlags & COORD_CONTEXT_CHANGED) { + // Coordinate context changes affect mCanvasTM if we have a + // percentage 'x' or 'y' + if (StyleSVGReset()->mX.HasPercent() || StyleSVGReset()->mY.HasPercent()) { + needNewBounds = true; + needNewCanvasTM = true; + } + + // Our coordinate context's width/height has changed. If we have a + // percentage width/height our dimensions will change so we must reflow. + if (StylePosition()->mWidth.HasPercent() || + StylePosition()->mHeight.HasPercent()) { + needNewBounds = true; + needReflow = true; + } + } + + if (aFlags & TRANSFORM_CHANGED) { + if (mCanvasTM && mCanvasTM->IsSingular()) { + needNewBounds = true; // old bounds are bogus + } + needNewCanvasTM = true; + // In an ideal world we would reflow when our CTM changes. This is because + // glyph metrics do not necessarily scale uniformly with change in scale + // and, as a result, CTM changes may require text to break at different + // points. The problem would be how to keep performance acceptable when + // e.g. the transform of an ancestor is animated. + // We also seem to get some sort of infinite loop post bug 421584 if we + // reflow. + } + + if (needNewBounds) { + // Ancestor changes can't affect how we render from the perspective of + // any rendering observers that we may have, so we don't need to + // invalidate them. We also don't need to invalidate ourself, since our + // changed ancestor will have invalidated its entire area, which includes + // our area. + SVGUtils::ScheduleReflowSVG(this); + } + + // If we're called while the PresShell is handling reflow events then we + // must have been called as a result of the NotifyViewportChange() call in + // our SVGOuterSVGFrame's Reflow() method. We must not call RequestReflow + // at this point (i.e. during reflow) because it could confuse the + // PresShell and prevent it from reflowing us properly in future. Besides + // that, SVGOuterSVGFrame::DidReflow will take care of reflowing us + // synchronously, so there's no need. + if (needReflow && !PresShell()->IsReflowLocked()) { + RequestReflow(IntrinsicDirty::None); + } + + if (needNewCanvasTM) { + // Do this after calling InvalidateAndScheduleBoundsUpdate in case we + // change the code and it needs to use it. + mCanvasTM = nullptr; + } +} + +SVGBBox SVGForeignObjectFrame::GetBBoxContribution( + const Matrix& aToBBoxUserspace, uint32_t aFlags) { + SVGForeignObjectElement* content = + static_cast<SVGForeignObjectElement*>(GetContent()); + + float x, y, w, h; + SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>( + content, &x, &y, &w, &h); + + if (w < 0.0f) w = 0.0f; + if (h < 0.0f) h = 0.0f; + + if (aToBBoxUserspace.IsSingular()) { + // XXX ReportToConsole + return SVGBBox(); + } + return aToBBoxUserspace.TransformBounds(gfx::Rect(0.0, 0.0, w, h)); +} + +//---------------------------------------------------------------------- + +gfxMatrix SVGForeignObjectFrame::GetCanvasTM() { + if (!mCanvasTM) { + NS_ASSERTION(GetParent(), "null parent"); + + auto* parent = static_cast<SVGContainerFrame*>(GetParent()); + auto* content = static_cast<SVGForeignObjectElement*>(GetContent()); + + gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM()); + + mCanvasTM = MakeUnique<gfxMatrix>(tm); + } + return *mCanvasTM; +} + +//---------------------------------------------------------------------- +// Implementation helpers + +void SVGForeignObjectFrame::RequestReflow(IntrinsicDirty aType) { + if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { + // If we haven't had a ReflowSVG() yet, nothing to do. + return; + } + + nsIFrame* kid = PrincipalChildList().FirstChild(); + if (!kid) { + return; + } + + PresShell()->FrameNeedsReflow(kid, aType, NS_FRAME_IS_DIRTY); +} + +void SVGForeignObjectFrame::DoReflow() { + MarkInReflow(); + // Skip reflow if we're zero-sized, unless this is our first reflow. + if (IsDisabled() && !HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { + return; + } + + nsPresContext* presContext = PresContext(); + nsIFrame* kid = PrincipalChildList().FirstChild(); + if (!kid) { + return; + } + + // initiate a synchronous reflow here and now: + UniquePtr<gfxContext> renderingContext = + presContext->PresShell()->CreateReferenceRenderingContext(); + + mInReflow = true; + + WritingMode wm = kid->GetWritingMode(); + ReflowInput reflowInput(presContext, kid, renderingContext.get(), + LogicalSize(wm, ISize(wm), NS_UNCONSTRAINEDSIZE)); + ReflowOutput desiredSize(reflowInput); + nsReflowStatus status; + + // We don't use mRect.height above because that tells the child to do + // page/column breaking at that height. + NS_ASSERTION( + reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) && + reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0), + "style system should ensure that :-moz-svg-foreign-content " + "does not get styled"); + NS_ASSERTION(reflowInput.ComputedISize() == ISize(wm), + "reflow input made child wrong size"); + reflowInput.SetComputedBSize(BSize(wm)); + + ReflowChild(kid, presContext, desiredSize, reflowInput, 0, 0, + ReflowChildFlags::NoMoveFrame, status); + NS_ASSERTION(mRect.width == desiredSize.Width() && + mRect.height == desiredSize.Height(), + "unexpected size"); + FinishReflowChild(kid, presContext, desiredSize, &reflowInput, 0, 0, + ReflowChildFlags::NoMoveFrame); + + mInReflow = false; +} + +void SVGForeignObjectFrame::AppendDirectlyOwnedAnonBoxes( + nsTArray<OwnedAnonBox>& aResult) { + MOZ_ASSERT(PrincipalChildList().FirstChild(), "Must have our anon box"); + aResult.AppendElement(OwnedAnonBox(PrincipalChildList().FirstChild())); +} + +} // namespace mozilla |