diff options
Diffstat (limited to 'layout/svg/nsSVGInnerSVGFrame.cpp')
| -rw-r--r-- | layout/svg/nsSVGInnerSVGFrame.cpp | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/layout/svg/nsSVGInnerSVGFrame.cpp b/layout/svg/nsSVGInnerSVGFrame.cpp new file mode 100644 index 000000000..8b5750d16 --- /dev/null +++ b/layout/svg/nsSVGInnerSVGFrame.cpp @@ -0,0 +1,322 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Main header first: +#include "nsSVGInnerSVGFrame.h" + +// Keep others in (case-insensitive) order: +#include "gfx2DGlue.h" +#include "gfxContext.h" +#include "nsIFrame.h" +#include "nsISVGChildFrame.h" +#include "nsSVGContainerFrame.h" +#include "nsSVGIntegrationUtils.h" +#include "mozilla/dom/SVGSVGElement.h" + +using namespace mozilla; +using namespace mozilla::dom; +using namespace mozilla::gfx; +using namespace mozilla::image; + +nsIFrame* +NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) +{ + return new (aPresShell) nsSVGInnerSVGFrame(aContext); +} + +NS_IMPL_FRAMEARENA_HELPERS(nsSVGInnerSVGFrame) + +//---------------------------------------------------------------------- +// nsIFrame methods + +NS_QUERYFRAME_HEAD(nsSVGInnerSVGFrame) + NS_QUERYFRAME_ENTRY(nsSVGInnerSVGFrame) + NS_QUERYFRAME_ENTRY(nsISVGSVGFrame) +NS_QUERYFRAME_TAIL_INHERITING(nsSVGDisplayContainerFrame) + +#ifdef DEBUG +void +nsSVGInnerSVGFrame::Init(nsIContent* aContent, + nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) +{ + NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svg), + "Content is not an SVG 'svg' element!"); + + nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow); +} +#endif /* DEBUG */ + +nsIAtom * +nsSVGInnerSVGFrame::GetType() const +{ + return nsGkAtoms::svgInnerSVGFrame; +} + +//---------------------------------------------------------------------- +// nsISVGChildFrame methods + +DrawResult +nsSVGInnerSVGFrame::PaintSVG(gfxContext& aContext, + const gfxMatrix& aTransform, + const nsIntRect *aDirtyRect) +{ + NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() || + (mState & NS_FRAME_IS_NONDISPLAY), + "If display lists are enabled, only painting of non-display " + "SVG should take this code path"); + + gfxContextAutoSaveRestore autoSR; + + if (StyleDisplay()->IsScrollableOverflow()) { + float x, y, width, height; + static_cast<SVGSVGElement*>(mContent)-> + GetAnimatedLengthValues(&x, &y, &width, &height, nullptr); + + if (width <= 0 || height <= 0) { + return DrawResult::SUCCESS; + } + + autoSR.SetContext(&aContext); + gfxRect clipRect = + nsSVGUtils::GetClipRectForFrame(this, x, y, width, height); + nsSVGUtils::SetClipRect(&aContext, aTransform, clipRect); + } + + return nsSVGDisplayContainerFrame::PaintSVG(aContext, aTransform, aDirtyRect); +} + +nsRect +nsSVGInnerSVGFrame::GetCoveredRegion() +{ + float x, y, w, h; + static_cast<SVGSVGElement*>(mContent)-> + GetAnimatedLengthValues(&x, &y, &w, &h, nullptr); + if (w < 0.0f) w = 0.0f; + if (h < 0.0f) h = 0.0f; + // GetCanvasTM includes the x,y translation + nsRect bounds = nsSVGUtils::ToCanvasBounds(gfxRect(0.0, 0.0, w, h), + GetCanvasTM(), + PresContext()); + + if (!StyleDisplay()->IsScrollableOverflow()) { + bounds.UnionRect(bounds, nsSVGUtils::GetCoveredRegion(mFrames)); + } + return bounds; +} + +void +nsSVGInnerSVGFrame::ReflowSVG() +{ + // mRect must be set before FinishAndStoreOverflow is called in order + // for our overflow areas to be clipped correctly. + float x, y, width, height; + static_cast<SVGSVGElement*>(mContent)-> + GetAnimatedLengthValues(&x, &y, &width, &height, nullptr); + mRect = nsLayoutUtils::RoundGfxRectToAppRect( + gfxRect(x, y, width, height), + PresContext()->AppUnitsPerCSSPixel()); + + // 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(); + } + + nsSVGDisplayContainerFrame::ReflowSVG(); +} + +void +nsSVGInnerSVGFrame::NotifySVGChanged(uint32_t aFlags) +{ + MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED), + "Invalidation logic may need adjusting"); + + if (aFlags & COORD_CONTEXT_CHANGED) { + + SVGSVGElement *svg = static_cast<SVGSVGElement*>(mContent); + + bool xOrYIsPercentage = + svg->mLengthAttributes[SVGSVGElement::ATTR_X].IsPercentage() || + svg->mLengthAttributes[SVGSVGElement::ATTR_Y].IsPercentage(); + bool widthOrHeightIsPercentage = + svg->mLengthAttributes[SVGSVGElement::ATTR_WIDTH].IsPercentage() || + svg->mLengthAttributes[SVGSVGElement::ATTR_HEIGHT].IsPercentage(); + + if (xOrYIsPercentage || widthOrHeightIsPercentage) { + // 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. + // For perf reasons we call this before calling NotifySVGChanged() below. + nsSVGUtils::ScheduleReflowSVG(this); + } + + // Coordinate context changes affect mCanvasTM if we have a + // percentage 'x' or 'y', or if we have a percentage 'width' or 'height' AND + // a 'viewBox'. + + if (!(aFlags & TRANSFORM_CHANGED) && + (xOrYIsPercentage || + (widthOrHeightIsPercentage && svg->HasViewBoxRect()))) { + aFlags |= TRANSFORM_CHANGED; + } + + if (svg->HasViewBoxRect() || !widthOrHeightIsPercentage) { + // Remove COORD_CONTEXT_CHANGED, since we establish the coordinate + // context for our descendants and this notification won't change its + // dimensions: + aFlags &= ~COORD_CONTEXT_CHANGED; + + if (!aFlags) { + return; // No notification flags left + } + } + } + + if (aFlags & TRANSFORM_CHANGED) { + // make sure our cached transform matrix gets (lazily) updated + mCanvasTM = nullptr; + } + + nsSVGDisplayContainerFrame::NotifySVGChanged(aFlags); +} + +nsresult +nsSVGInnerSVGFrame::AttributeChanged(int32_t aNameSpaceID, + nsIAtom* aAttribute, + int32_t aModType) +{ + if (aNameSpaceID == kNameSpaceID_None && + !(GetStateBits() & NS_FRAME_IS_NONDISPLAY)) { + + SVGSVGElement* content = static_cast<SVGSVGElement*>(mContent); + + if (aAttribute == nsGkAtoms::width || + aAttribute == nsGkAtoms::height) { + nsLayoutUtils::PostRestyleEvent( + mContent->AsElement(), nsRestyleHint(0), + nsChangeHint_InvalidateRenderingObservers); + nsSVGUtils::ScheduleReflowSVG(this); + + if (content->HasViewBoxOrSyntheticViewBox()) { + // make sure our cached transform matrix gets (lazily) updated + mCanvasTM = nullptr; + content->ChildrenOnlyTransformChanged(); + nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED); + } else { + uint32_t flags = COORD_CONTEXT_CHANGED; + if (mCanvasTM && mCanvasTM->IsSingular()) { + mCanvasTM = nullptr; + flags |= TRANSFORM_CHANGED; + } + nsSVGUtils::NotifyChildrenOfSVGChange(this, flags); + } + + } else if (aAttribute == nsGkAtoms::transform || + aAttribute == nsGkAtoms::preserveAspectRatio || + aAttribute == nsGkAtoms::viewBox || + aAttribute == nsGkAtoms::x || + aAttribute == nsGkAtoms::y) { + // make sure our cached transform matrix gets (lazily) updated + mCanvasTM = nullptr; + + nsSVGUtils::NotifyChildrenOfSVGChange( + this, aAttribute == nsGkAtoms::viewBox ? + TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED); + + // 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. + + if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) { + nsLayoutUtils::PostRestyleEvent( + mContent->AsElement(), nsRestyleHint(0), + nsChangeHint_InvalidateRenderingObservers); + nsSVGUtils::ScheduleReflowSVG(this); + } else if (aAttribute == nsGkAtoms::viewBox || + (aAttribute == nsGkAtoms::preserveAspectRatio && + content->HasViewBoxOrSyntheticViewBox())) { + content->ChildrenOnlyTransformChanged(); + // SchedulePaint sets a global state flag so we only need to call it once + // (on ourself is fine), not once on each child (despite bug 828240). + SchedulePaint(); + } + } + } + + return NS_OK; +} + +nsIFrame* +nsSVGInnerSVGFrame::GetFrameForPoint(const gfxPoint& aPoint) +{ + NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() || + (mState & NS_FRAME_IS_NONDISPLAY), + "If display lists are enabled, only hit-testing of non-display " + "SVG should take this code path"); + + if (StyleDisplay()->IsScrollableOverflow()) { + Rect clip; + static_cast<nsSVGElement*>(mContent)-> + GetAnimatedLengthValues(&clip.x, &clip.y, + &clip.width, &clip.height, nullptr); + if (!clip.Contains(ToPoint(aPoint))) { + return nullptr; + } + } + + return nsSVGDisplayContainerFrame::GetFrameForPoint(aPoint); +} + +//---------------------------------------------------------------------- +// nsISVGSVGFrame methods: + +void +nsSVGInnerSVGFrame::NotifyViewportOrTransformChanged(uint32_t aFlags) +{ + // The dimensions of inner-<svg> frames are purely defined by their "width" + // and "height" attributes, and transform changes can only occur as a result + // of changes to their "width", "height", "viewBox" or "preserveAspectRatio" + // attributes. Changes to all of these attributes are handled in + // AttributeChanged(), so we should never be called. + NS_ERROR("Not called for nsSVGInnerSVGFrame"); +} + +//---------------------------------------------------------------------- +// nsSVGContainerFrame methods: + +gfxMatrix +nsSVGInnerSVGFrame::GetCanvasTM() +{ + if (!mCanvasTM) { + NS_ASSERTION(GetParent(), "null parent"); + + nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent()); + SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent); + + gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM()); + + mCanvasTM = new gfxMatrix(tm); + } + return *mCanvasTM; +} + +bool +nsSVGInnerSVGFrame::HasChildrenOnlyTransform(gfx::Matrix *aTransform) const +{ + SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent); + + if (content->HasViewBoxOrSyntheticViewBox()) { + // XXX Maybe return false if the transform is the identity transform? + if (aTransform) { + *aTransform = content->GetViewBoxTransform(); + } + return true; + } + return false; +} |