michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: // Keep in (case-insensitive) order:
michael@0: #include "gfxRect.h"
michael@0: #include "nsSVGEffects.h"
michael@0: #include "nsSVGGFrame.h"
michael@0: #include "mozilla/dom/SVGSwitchElement.h"
michael@0: #include "nsSVGUtils.h"
michael@0: 
michael@0: class nsRenderingContext;
michael@0: 
michael@0: using namespace mozilla::gfx;
michael@0: 
michael@0: typedef nsSVGGFrame nsSVGSwitchFrameBase;
michael@0: 
michael@0: class nsSVGSwitchFrame : public nsSVGSwitchFrameBase
michael@0: {
michael@0:   friend nsIFrame*
michael@0:   NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
michael@0: protected:
michael@0:   nsSVGSwitchFrame(nsStyleContext* aContext) :
michael@0:     nsSVGSwitchFrameBase(aContext) {}
michael@0: 
michael@0: public:
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0: #ifdef DEBUG
michael@0:   virtual void Init(nsIContent*      aContent,
michael@0:                     nsIFrame*        aParent,
michael@0:                     nsIFrame*        aPrevInFlow) MOZ_OVERRIDE;
michael@0: #endif
michael@0: 
michael@0:   /**
michael@0:    * Get the "type" of the frame
michael@0:    *
michael@0:    * @see nsGkAtoms::svgSwitchFrame
michael@0:    */
michael@0:   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
michael@0: 
michael@0: #ifdef DEBUG_FRAME_DUMP
michael@0:   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
michael@0:   {
michael@0:     return MakeFrameName(NS_LITERAL_STRING("SVGSwitch"), aResult);
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
michael@0:                                 const nsRect&           aDirtyRect,
michael@0:                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
michael@0: 
michael@0:   // nsISVGChildFrame interface:
michael@0:   virtual nsresult PaintSVG(nsRenderingContext* aContext,
michael@0:                             const nsIntRect *aDirtyRect,
michael@0:                             nsIFrame* aTransformRoot) MOZ_OVERRIDE;
michael@0:   nsIFrame* GetFrameForPoint(const nsPoint &aPoint) MOZ_OVERRIDE;
michael@0:   nsRect GetCoveredRegion() MOZ_OVERRIDE;
michael@0:   virtual void ReflowSVG() MOZ_OVERRIDE;
michael@0:   virtual SVGBBox GetBBoxContribution(const Matrix &aToBBoxUserspace,
michael@0:                                       uint32_t aFlags) MOZ_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:   nsIFrame *GetActiveChildFrame();
michael@0: };
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // Implementation
michael@0: 
michael@0: nsIFrame*
michael@0: NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
michael@0: {  
michael@0:   return new (aPresShell) nsSVGSwitchFrame(aContext);
michael@0: }
michael@0: 
michael@0: NS_IMPL_FRAMEARENA_HELPERS(nsSVGSwitchFrame)
michael@0: 
michael@0: #ifdef DEBUG
michael@0: void
michael@0: nsSVGSwitchFrame::Init(nsIContent* aContent,
michael@0:                        nsIFrame* aParent,
michael@0:                        nsIFrame* aPrevInFlow)
michael@0: {
michael@0:   NS_ASSERTION(aContent->IsSVG(nsGkAtoms::svgSwitch),
michael@0:                "Content is not an SVG switch");
michael@0: 
michael@0:   nsSVGSwitchFrameBase::Init(aContent, aParent, aPrevInFlow);
michael@0: }
michael@0: #endif /* DEBUG */
michael@0: 
michael@0: nsIAtom *
michael@0: nsSVGSwitchFrame::GetType() const
michael@0: {
michael@0:   return nsGkAtoms::svgSwitchFrame;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsSVGSwitchFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
michael@0:                                    const nsRect&           aDirtyRect,
michael@0:                                    const nsDisplayListSet& aLists)
michael@0: {
michael@0:   nsIFrame* kid = GetActiveChildFrame();
michael@0:   if (kid) {
michael@0:     BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
michael@0:   }
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsSVGSwitchFrame::PaintSVG(nsRenderingContext* aContext,
michael@0:                            const nsIntRect *aDirtyRect,
michael@0:                            nsIFrame* aTransformRoot)
michael@0: {
michael@0:   NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
michael@0:                (mState & NS_FRAME_IS_NONDISPLAY),
michael@0:                "If display lists are enabled, only painting of non-display "
michael@0:                "SVG should take this code path");
michael@0: 
michael@0:   if (StyleDisplay()->mOpacity == 0.0)
michael@0:     return NS_OK;
michael@0: 
michael@0:   nsIFrame *kid = GetActiveChildFrame();
michael@0:   if (kid) {
michael@0:     nsSVGUtils::PaintFrameWithEffects(aContext, aDirtyRect, kid, aTransformRoot);
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: 
michael@0: nsIFrame*
michael@0: nsSVGSwitchFrame::GetFrameForPoint(const nsPoint &aPoint)
michael@0: {
michael@0:   NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
michael@0:                (mState & NS_FRAME_IS_NONDISPLAY),
michael@0:                "If display lists are enabled, only hit-testing of non-display "
michael@0:                "SVG should take this code path");
michael@0: 
michael@0:   nsIFrame *kid = GetActiveChildFrame();
michael@0:   nsISVGChildFrame* svgFrame = do_QueryFrame(kid);
michael@0:   if (svgFrame) {
michael@0:     return svgFrame->GetFrameForPoint(aPoint);
michael@0:   }
michael@0: 
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: nsRect
michael@0: nsSVGSwitchFrame::GetCoveredRegion()
michael@0: {
michael@0:   nsRect rect;
michael@0: 
michael@0:   nsIFrame *kid = GetActiveChildFrame();
michael@0:   nsISVGChildFrame* child = do_QueryFrame(kid);
michael@0:   if (child) {
michael@0:     rect = child->GetCoveredRegion();
michael@0:   }
michael@0:   return rect;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsSVGSwitchFrame::ReflowSVG()
michael@0: {
michael@0:   NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
michael@0:                "This call is probably a wasteful mistake");
michael@0: 
michael@0:   NS_ABORT_IF_FALSE(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
michael@0:                     "ReflowSVG mechanism not designed for this");
michael@0: 
michael@0:   if (!nsSVGUtils::NeedsReflowSVG(this)) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   // If the NS_FRAME_FIRST_REFLOW bit has been removed from our parent frame,
michael@0:   // then our outer-<svg> has previously had its initial reflow. In that case
michael@0:   // we need to make sure that that bit has been removed from ourself _before_
michael@0:   // recursing over our children to ensure that they know too. Otherwise, we
michael@0:   // need to remove it _after_ recursing over our children so that they know
michael@0:   // the initial reflow is currently underway.
michael@0: 
michael@0:   bool isFirstReflow = (mState & NS_FRAME_FIRST_REFLOW);
michael@0: 
michael@0:   bool outerSVGHasHadFirstReflow =
michael@0:     (GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW) == 0;
michael@0: 
michael@0:   if (outerSVGHasHadFirstReflow) {
michael@0:     mState &= ~NS_FRAME_FIRST_REFLOW; // tell our children
michael@0:   }
michael@0: 
michael@0:   nsOverflowAreas overflowRects;
michael@0: 
michael@0:   nsIFrame *child = GetActiveChildFrame();
michael@0:   nsISVGChildFrame* svgChild = do_QueryFrame(child);
michael@0:   if (svgChild) {
michael@0:     NS_ABORT_IF_FALSE(!(child->GetStateBits() & NS_FRAME_IS_NONDISPLAY),
michael@0:                       "Check for this explicitly in the |if|, then");
michael@0:     svgChild->ReflowSVG();
michael@0: 
michael@0:     // We build up our child frame overflows here instead of using
michael@0:     // nsLayoutUtils::UnionChildOverflow since SVG frame's all use the same
michael@0:     // frame list, and we're iterating over that list now anyway.
michael@0:     ConsiderChildOverflow(overflowRects, child);
michael@0:   }
michael@0: 
michael@0:   if (isFirstReflow) {
michael@0:     // Make sure we have our filter property (if any) before calling
michael@0:     // FinishAndStoreOverflow (subsequent filter changes are handled off
michael@0:     // nsChangeHint_UpdateEffects):
michael@0:     nsSVGEffects::UpdateEffects(this);
michael@0:   }
michael@0: 
michael@0:   FinishAndStoreOverflow(overflowRects, mRect.Size());
michael@0: 
michael@0:   // Remove state bits after FinishAndStoreOverflow so that it doesn't
michael@0:   // invalidate on first reflow:
michael@0:   mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
michael@0:               NS_FRAME_HAS_DIRTY_CHILDREN);
michael@0: }
michael@0: 
michael@0: SVGBBox
michael@0: nsSVGSwitchFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
michael@0:                                       uint32_t aFlags)
michael@0: {
michael@0:   nsIFrame* kid = GetActiveChildFrame();
michael@0:   nsISVGChildFrame* svgKid = do_QueryFrame(kid);
michael@0:   if (svgKid) {
michael@0:     nsIContent *content = kid->GetContent();
michael@0:     gfxMatrix transform = ThebesMatrix(aToBBoxUserspace);
michael@0:     if (content->IsSVG()) {
michael@0:       transform = static_cast<nsSVGElement*>(content)->
michael@0:                     PrependLocalTransformsTo(transform);
michael@0:     }
michael@0:     return svgKid->GetBBoxContribution(ToMatrix(transform), aFlags);
michael@0:   }
michael@0:   return SVGBBox();
michael@0: }
michael@0: 
michael@0: nsIFrame *
michael@0: nsSVGSwitchFrame::GetActiveChildFrame()
michael@0: {
michael@0:   nsIContent *activeChild =
michael@0:     static_cast<mozilla::dom::SVGSwitchElement*>(mContent)->GetActiveChild();
michael@0: 
michael@0:   if (activeChild) {
michael@0:     for (nsIFrame* kid = mFrames.FirstChild(); kid;
michael@0:          kid = kid->GetNextSibling()) {
michael@0: 
michael@0:       if (activeChild == kid->GetContent()) {
michael@0:         return kid;
michael@0:       }
michael@0:     }
michael@0:   }
michael@0:   return nullptr;
michael@0: }