1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/svg/nsSVGSwitchFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,253 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +// Keep in (case-insensitive) order:
1.10 +#include "gfxRect.h"
1.11 +#include "nsSVGEffects.h"
1.12 +#include "nsSVGGFrame.h"
1.13 +#include "mozilla/dom/SVGSwitchElement.h"
1.14 +#include "nsSVGUtils.h"
1.15 +
1.16 +class nsRenderingContext;
1.17 +
1.18 +using namespace mozilla::gfx;
1.19 +
1.20 +typedef nsSVGGFrame nsSVGSwitchFrameBase;
1.21 +
1.22 +class nsSVGSwitchFrame : public nsSVGSwitchFrameBase
1.23 +{
1.24 + friend nsIFrame*
1.25 + NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.26 +protected:
1.27 + nsSVGSwitchFrame(nsStyleContext* aContext) :
1.28 + nsSVGSwitchFrameBase(aContext) {}
1.29 +
1.30 +public:
1.31 + NS_DECL_FRAMEARENA_HELPERS
1.32 +
1.33 +#ifdef DEBUG
1.34 + virtual void Init(nsIContent* aContent,
1.35 + nsIFrame* aParent,
1.36 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.37 +#endif
1.38 +
1.39 + /**
1.40 + * Get the "type" of the frame
1.41 + *
1.42 + * @see nsGkAtoms::svgSwitchFrame
1.43 + */
1.44 + virtual nsIAtom* GetType() const MOZ_OVERRIDE;
1.45 +
1.46 +#ifdef DEBUG_FRAME_DUMP
1.47 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.48 + {
1.49 + return MakeFrameName(NS_LITERAL_STRING("SVGSwitch"), aResult);
1.50 + }
1.51 +#endif
1.52 +
1.53 + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.54 + const nsRect& aDirtyRect,
1.55 + const nsDisplayListSet& aLists) MOZ_OVERRIDE;
1.56 +
1.57 + // nsISVGChildFrame interface:
1.58 + virtual nsresult PaintSVG(nsRenderingContext* aContext,
1.59 + const nsIntRect *aDirtyRect,
1.60 + nsIFrame* aTransformRoot) MOZ_OVERRIDE;
1.61 + nsIFrame* GetFrameForPoint(const nsPoint &aPoint) MOZ_OVERRIDE;
1.62 + nsRect GetCoveredRegion() MOZ_OVERRIDE;
1.63 + virtual void ReflowSVG() MOZ_OVERRIDE;
1.64 + virtual SVGBBox GetBBoxContribution(const Matrix &aToBBoxUserspace,
1.65 + uint32_t aFlags) MOZ_OVERRIDE;
1.66 +
1.67 +private:
1.68 + nsIFrame *GetActiveChildFrame();
1.69 +};
1.70 +
1.71 +//----------------------------------------------------------------------
1.72 +// Implementation
1.73 +
1.74 +nsIFrame*
1.75 +NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.76 +{
1.77 + return new (aPresShell) nsSVGSwitchFrame(aContext);
1.78 +}
1.79 +
1.80 +NS_IMPL_FRAMEARENA_HELPERS(nsSVGSwitchFrame)
1.81 +
1.82 +#ifdef DEBUG
1.83 +void
1.84 +nsSVGSwitchFrame::Init(nsIContent* aContent,
1.85 + nsIFrame* aParent,
1.86 + nsIFrame* aPrevInFlow)
1.87 +{
1.88 + NS_ASSERTION(aContent->IsSVG(nsGkAtoms::svgSwitch),
1.89 + "Content is not an SVG switch");
1.90 +
1.91 + nsSVGSwitchFrameBase::Init(aContent, aParent, aPrevInFlow);
1.92 +}
1.93 +#endif /* DEBUG */
1.94 +
1.95 +nsIAtom *
1.96 +nsSVGSwitchFrame::GetType() const
1.97 +{
1.98 + return nsGkAtoms::svgSwitchFrame;
1.99 +}
1.100 +
1.101 +void
1.102 +nsSVGSwitchFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.103 + const nsRect& aDirtyRect,
1.104 + const nsDisplayListSet& aLists)
1.105 +{
1.106 + nsIFrame* kid = GetActiveChildFrame();
1.107 + if (kid) {
1.108 + BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
1.109 + }
1.110 +}
1.111 +
1.112 +nsresult
1.113 +nsSVGSwitchFrame::PaintSVG(nsRenderingContext* aContext,
1.114 + const nsIntRect *aDirtyRect,
1.115 + nsIFrame* aTransformRoot)
1.116 +{
1.117 + NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
1.118 + (mState & NS_FRAME_IS_NONDISPLAY),
1.119 + "If display lists are enabled, only painting of non-display "
1.120 + "SVG should take this code path");
1.121 +
1.122 + if (StyleDisplay()->mOpacity == 0.0)
1.123 + return NS_OK;
1.124 +
1.125 + nsIFrame *kid = GetActiveChildFrame();
1.126 + if (kid) {
1.127 + nsSVGUtils::PaintFrameWithEffects(aContext, aDirtyRect, kid, aTransformRoot);
1.128 + }
1.129 + return NS_OK;
1.130 +}
1.131 +
1.132 +
1.133 +nsIFrame*
1.134 +nsSVGSwitchFrame::GetFrameForPoint(const nsPoint &aPoint)
1.135 +{
1.136 + NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
1.137 + (mState & NS_FRAME_IS_NONDISPLAY),
1.138 + "If display lists are enabled, only hit-testing of non-display "
1.139 + "SVG should take this code path");
1.140 +
1.141 + nsIFrame *kid = GetActiveChildFrame();
1.142 + nsISVGChildFrame* svgFrame = do_QueryFrame(kid);
1.143 + if (svgFrame) {
1.144 + return svgFrame->GetFrameForPoint(aPoint);
1.145 + }
1.146 +
1.147 + return nullptr;
1.148 +}
1.149 +
1.150 +nsRect
1.151 +nsSVGSwitchFrame::GetCoveredRegion()
1.152 +{
1.153 + nsRect rect;
1.154 +
1.155 + nsIFrame *kid = GetActiveChildFrame();
1.156 + nsISVGChildFrame* child = do_QueryFrame(kid);
1.157 + if (child) {
1.158 + rect = child->GetCoveredRegion();
1.159 + }
1.160 + return rect;
1.161 +}
1.162 +
1.163 +void
1.164 +nsSVGSwitchFrame::ReflowSVG()
1.165 +{
1.166 + NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
1.167 + "This call is probably a wasteful mistake");
1.168 +
1.169 + NS_ABORT_IF_FALSE(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
1.170 + "ReflowSVG mechanism not designed for this");
1.171 +
1.172 + if (!nsSVGUtils::NeedsReflowSVG(this)) {
1.173 + return;
1.174 + }
1.175 +
1.176 + // If the NS_FRAME_FIRST_REFLOW bit has been removed from our parent frame,
1.177 + // then our outer-<svg> has previously had its initial reflow. In that case
1.178 + // we need to make sure that that bit has been removed from ourself _before_
1.179 + // recursing over our children to ensure that they know too. Otherwise, we
1.180 + // need to remove it _after_ recursing over our children so that they know
1.181 + // the initial reflow is currently underway.
1.182 +
1.183 + bool isFirstReflow = (mState & NS_FRAME_FIRST_REFLOW);
1.184 +
1.185 + bool outerSVGHasHadFirstReflow =
1.186 + (GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW) == 0;
1.187 +
1.188 + if (outerSVGHasHadFirstReflow) {
1.189 + mState &= ~NS_FRAME_FIRST_REFLOW; // tell our children
1.190 + }
1.191 +
1.192 + nsOverflowAreas overflowRects;
1.193 +
1.194 + nsIFrame *child = GetActiveChildFrame();
1.195 + nsISVGChildFrame* svgChild = do_QueryFrame(child);
1.196 + if (svgChild) {
1.197 + NS_ABORT_IF_FALSE(!(child->GetStateBits() & NS_FRAME_IS_NONDISPLAY),
1.198 + "Check for this explicitly in the |if|, then");
1.199 + svgChild->ReflowSVG();
1.200 +
1.201 + // We build up our child frame overflows here instead of using
1.202 + // nsLayoutUtils::UnionChildOverflow since SVG frame's all use the same
1.203 + // frame list, and we're iterating over that list now anyway.
1.204 + ConsiderChildOverflow(overflowRects, child);
1.205 + }
1.206 +
1.207 + if (isFirstReflow) {
1.208 + // Make sure we have our filter property (if any) before calling
1.209 + // FinishAndStoreOverflow (subsequent filter changes are handled off
1.210 + // nsChangeHint_UpdateEffects):
1.211 + nsSVGEffects::UpdateEffects(this);
1.212 + }
1.213 +
1.214 + FinishAndStoreOverflow(overflowRects, mRect.Size());
1.215 +
1.216 + // Remove state bits after FinishAndStoreOverflow so that it doesn't
1.217 + // invalidate on first reflow:
1.218 + mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
1.219 + NS_FRAME_HAS_DIRTY_CHILDREN);
1.220 +}
1.221 +
1.222 +SVGBBox
1.223 +nsSVGSwitchFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
1.224 + uint32_t aFlags)
1.225 +{
1.226 + nsIFrame* kid = GetActiveChildFrame();
1.227 + nsISVGChildFrame* svgKid = do_QueryFrame(kid);
1.228 + if (svgKid) {
1.229 + nsIContent *content = kid->GetContent();
1.230 + gfxMatrix transform = ThebesMatrix(aToBBoxUserspace);
1.231 + if (content->IsSVG()) {
1.232 + transform = static_cast<nsSVGElement*>(content)->
1.233 + PrependLocalTransformsTo(transform);
1.234 + }
1.235 + return svgKid->GetBBoxContribution(ToMatrix(transform), aFlags);
1.236 + }
1.237 + return SVGBBox();
1.238 +}
1.239 +
1.240 +nsIFrame *
1.241 +nsSVGSwitchFrame::GetActiveChildFrame()
1.242 +{
1.243 + nsIContent *activeChild =
1.244 + static_cast<mozilla::dom::SVGSwitchElement*>(mContent)->GetActiveChild();
1.245 +
1.246 + if (activeChild) {
1.247 + for (nsIFrame* kid = mFrames.FirstChild(); kid;
1.248 + kid = kid->GetNextSibling()) {
1.249 +
1.250 + if (activeChild == kid->GetContent()) {
1.251 + return kid;
1.252 + }
1.253 + }
1.254 + }
1.255 + return nullptr;
1.256 +}
