1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/svg/nsSVGUseFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,252 @@
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 "nsIAnonymousContentCreator.h"
1.11 +#include "nsSVGEffects.h"
1.12 +#include "nsSVGGFrame.h"
1.13 +#include "mozilla/dom/SVGUseElement.h"
1.14 +#include "nsContentList.h"
1.15 +
1.16 +typedef nsSVGGFrame nsSVGUseFrameBase;
1.17 +
1.18 +using namespace mozilla::dom;
1.19 +
1.20 +class nsSVGUseFrame : public nsSVGUseFrameBase,
1.21 + public nsIAnonymousContentCreator
1.22 +{
1.23 + friend nsIFrame*
1.24 + NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.25 +
1.26 +protected:
1.27 + nsSVGUseFrame(nsStyleContext* aContext) :
1.28 + nsSVGUseFrameBase(aContext),
1.29 + mHasValidDimensions(true)
1.30 + {}
1.31 +
1.32 +public:
1.33 + NS_DECL_QUERYFRAME
1.34 + NS_DECL_FRAMEARENA_HELPERS
1.35 +
1.36 +
1.37 + // nsIFrame interface:
1.38 + virtual void Init(nsIContent* aContent,
1.39 + nsIFrame* aParent,
1.40 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.41 +
1.42 + virtual nsresult AttributeChanged(int32_t aNameSpaceID,
1.43 + nsIAtom* aAttribute,
1.44 + int32_t aModType) MOZ_OVERRIDE;
1.45 +
1.46 + virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
1.47 +
1.48 + /**
1.49 + * Get the "type" of the frame
1.50 + *
1.51 + * @see nsGkAtoms::svgUseFrame
1.52 + */
1.53 + virtual nsIAtom* GetType() const MOZ_OVERRIDE;
1.54 +
1.55 + virtual bool IsLeaf() const MOZ_OVERRIDE;
1.56 +
1.57 +#ifdef DEBUG_FRAME_DUMP
1.58 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.59 + {
1.60 + return MakeFrameName(NS_LITERAL_STRING("SVGUse"), aResult);
1.61 + }
1.62 +#endif
1.63 +
1.64 + // nsISVGChildFrame interface:
1.65 + virtual void ReflowSVG() MOZ_OVERRIDE;
1.66 + virtual void NotifySVGChanged(uint32_t aFlags) MOZ_OVERRIDE;
1.67 +
1.68 + // nsIAnonymousContentCreator
1.69 + virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
1.70 + virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
1.71 + uint32_t aFilter) MOZ_OVERRIDE;
1.72 +
1.73 +private:
1.74 + bool mHasValidDimensions;
1.75 +};
1.76 +
1.77 +//----------------------------------------------------------------------
1.78 +// Implementation
1.79 +
1.80 +nsIFrame*
1.81 +NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.82 +{
1.83 + return new (aPresShell) nsSVGUseFrame(aContext);
1.84 +}
1.85 +
1.86 +NS_IMPL_FRAMEARENA_HELPERS(nsSVGUseFrame)
1.87 +
1.88 +nsIAtom *
1.89 +nsSVGUseFrame::GetType() const
1.90 +{
1.91 + return nsGkAtoms::svgUseFrame;
1.92 +}
1.93 +
1.94 +//----------------------------------------------------------------------
1.95 +// nsQueryFrame methods
1.96 +
1.97 +NS_QUERYFRAME_HEAD(nsSVGUseFrame)
1.98 + NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
1.99 +NS_QUERYFRAME_TAIL_INHERITING(nsSVGUseFrameBase)
1.100 +
1.101 +//----------------------------------------------------------------------
1.102 +// nsIFrame methods:
1.103 +
1.104 +void
1.105 +nsSVGUseFrame::Init(nsIContent* aContent,
1.106 + nsIFrame* aParent,
1.107 + nsIFrame* aPrevInFlow)
1.108 +{
1.109 + NS_ASSERTION(aContent->IsSVG(nsGkAtoms::use),
1.110 + "Content is not an SVG use!");
1.111 +
1.112 + mHasValidDimensions =
1.113 + static_cast<SVGUseElement*>(aContent)->HasValidDimensions();
1.114 +
1.115 + nsSVGUseFrameBase::Init(aContent, aParent, aPrevInFlow);
1.116 +}
1.117 +
1.118 +nsresult
1.119 +nsSVGUseFrame::AttributeChanged(int32_t aNameSpaceID,
1.120 + nsIAtom* aAttribute,
1.121 + int32_t aModType)
1.122 +{
1.123 + SVGUseElement *useElement = static_cast<SVGUseElement*>(mContent);
1.124 +
1.125 + if (aNameSpaceID == kNameSpaceID_None) {
1.126 + if (aAttribute == nsGkAtoms::x ||
1.127 + aAttribute == nsGkAtoms::y) {
1.128 + // make sure our cached transform matrix gets (lazily) updated
1.129 + mCanvasTM = nullptr;
1.130 + nsSVGEffects::InvalidateRenderingObservers(this);
1.131 + nsSVGUtils::ScheduleReflowSVG(this);
1.132 + nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
1.133 + } else if (aAttribute == nsGkAtoms::width ||
1.134 + aAttribute == nsGkAtoms::height) {
1.135 + bool invalidate = false;
1.136 + if (mHasValidDimensions != useElement->HasValidDimensions()) {
1.137 + mHasValidDimensions = !mHasValidDimensions;
1.138 + invalidate = true;
1.139 + }
1.140 + if (useElement->OurWidthAndHeightAreUsed()) {
1.141 + invalidate = true;
1.142 + useElement->SyncWidthOrHeight(aAttribute);
1.143 + }
1.144 + if (invalidate) {
1.145 + nsSVGEffects::InvalidateRenderingObservers(this);
1.146 + nsSVGUtils::ScheduleReflowSVG(this);
1.147 + }
1.148 + }
1.149 + } else if (aNameSpaceID == kNameSpaceID_XLink &&
1.150 + aAttribute == nsGkAtoms::href) {
1.151 + // we're changing our nature, clear out the clone information
1.152 + nsSVGEffects::InvalidateRenderingObservers(this);
1.153 + nsSVGUtils::ScheduleReflowSVG(this);
1.154 + useElement->mOriginal = nullptr;
1.155 + useElement->UnlinkSource();
1.156 + useElement->TriggerReclone();
1.157 + }
1.158 +
1.159 + return nsSVGUseFrameBase::AttributeChanged(aNameSpaceID,
1.160 + aAttribute, aModType);
1.161 +}
1.162 +
1.163 +void
1.164 +nsSVGUseFrame::DestroyFrom(nsIFrame* aDestructRoot)
1.165 +{
1.166 + nsRefPtr<SVGUseElement> use = static_cast<SVGUseElement*>(mContent);
1.167 + nsSVGUseFrameBase::DestroyFrom(aDestructRoot);
1.168 + use->DestroyAnonymousContent();
1.169 +}
1.170 +
1.171 +bool
1.172 +nsSVGUseFrame::IsLeaf() const
1.173 +{
1.174 + return true;
1.175 +}
1.176 +
1.177 +
1.178 +//----------------------------------------------------------------------
1.179 +// nsISVGChildFrame methods
1.180 +
1.181 +void
1.182 +nsSVGUseFrame::ReflowSVG()
1.183 +{
1.184 + // We only handle x/y offset here, since any width/height that is in force is
1.185 + // handled by the nsSVGOuterSVGFrame for the anonymous <svg> that will be
1.186 + // created for that purpose.
1.187 + float x, y;
1.188 + static_cast<SVGUseElement*>(mContent)->
1.189 + GetAnimatedLengthValues(&x, &y, nullptr);
1.190 + mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(
1.191 + gfxRect(x, y, 0.0, 0.0),
1.192 + PresContext()->AppUnitsPerCSSPixel()).TopLeft());
1.193 +
1.194 + // If we have a filter, we need to invalidate ourselves because filter
1.195 + // output can change even if none of our descendants need repainting.
1.196 + if (StyleSVGReset()->HasFilters()) {
1.197 + InvalidateFrame();
1.198 + }
1.199 +
1.200 + nsSVGUseFrameBase::ReflowSVG();
1.201 +}
1.202 +
1.203 +void
1.204 +nsSVGUseFrame::NotifySVGChanged(uint32_t aFlags)
1.205 +{
1.206 + if (aFlags & COORD_CONTEXT_CHANGED &&
1.207 + !(aFlags & TRANSFORM_CHANGED)) {
1.208 + // Coordinate context changes affect mCanvasTM if we have a
1.209 + // percentage 'x' or 'y'
1.210 + SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
1.211 + if (use->mLengthAttributes[SVGUseElement::ATTR_X].IsPercentage() ||
1.212 + use->mLengthAttributes[SVGUseElement::ATTR_Y].IsPercentage()) {
1.213 + aFlags |= TRANSFORM_CHANGED;
1.214 + // Ancestor changes can't affect how we render from the perspective of
1.215 + // any rendering observers that we may have, so we don't need to
1.216 + // invalidate them. We also don't need to invalidate ourself, since our
1.217 + // changed ancestor will have invalidated its entire area, which includes
1.218 + // our area.
1.219 + // For perf reasons we call this before calling NotifySVGChanged() below.
1.220 + nsSVGUtils::ScheduleReflowSVG(this);
1.221 + }
1.222 + }
1.223 +
1.224 + // We don't remove the TRANSFORM_CHANGED flag here if we have a viewBox or
1.225 + // non-percentage width/height, since if they're set then they are cloned to
1.226 + // an anonymous child <svg>, and its nsSVGInnerSVGFrame will do that.
1.227 +
1.228 + nsSVGUseFrameBase::NotifySVGChanged(aFlags);
1.229 +}
1.230 +
1.231 +//----------------------------------------------------------------------
1.232 +// nsIAnonymousContentCreator methods:
1.233 +
1.234 +nsresult
1.235 +nsSVGUseFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
1.236 +{
1.237 + SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
1.238 +
1.239 + nsIContent* clone = use->CreateAnonymousContent();
1.240 + nsSVGEffects::InvalidateRenderingObservers(this);
1.241 + if (!clone)
1.242 + return NS_ERROR_FAILURE;
1.243 + if (!aElements.AppendElement(clone))
1.244 + return NS_ERROR_OUT_OF_MEMORY;
1.245 + return NS_OK;
1.246 +}
1.247 +
1.248 +void
1.249 +nsSVGUseFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
1.250 + uint32_t aFilter)
1.251 +{
1.252 + SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
1.253 + nsIContent* clone = use->GetAnonymousContent();
1.254 + aElements.MaybeAppendElement(clone);
1.255 +}
