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/* -*- 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/. */
// Keep in (case-insensitive) order:
#include "nsIAnonymousContentCreator.h"
#include "nsSVGEffects.h"
#include "nsSVGGFrame.h"
#include "mozilla/dom/SVGUseElement.h"
#include "nsContentList.h"
using namespace mozilla::dom;
class nsSVGUseFrame : public nsSVGGFrame
, public nsIAnonymousContentCreator
{
friend nsIFrame*
NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
protected:
explicit nsSVGUseFrame(nsStyleContext* aContext)
: nsSVGGFrame(aContext)
, mHasValidDimensions(true)
{}
public:
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame interface:
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::svgUseFrame
*/
virtual nsIAtom* GetType() const override;
virtual bool IsLeaf() const override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGUse"), aResult);
}
#endif
// nsISVGChildFrame interface:
virtual void ReflowSVG() override;
virtual void NotifySVGChanged(uint32_t aFlags) override;
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) override;
private:
bool mHasValidDimensions;
};
//----------------------------------------------------------------------
// Implementation
nsIFrame*
NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsSVGUseFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsSVGUseFrame)
nsIAtom *
nsSVGUseFrame::GetType() const
{
return nsGkAtoms::svgUseFrame;
}
//----------------------------------------------------------------------
// nsQueryFrame methods
NS_QUERYFRAME_HEAD(nsSVGUseFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsSVGGFrame)
//----------------------------------------------------------------------
// nsIFrame methods:
void
nsSVGUseFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::use),
"Content is not an SVG use!");
mHasValidDimensions =
static_cast<SVGUseElement*>(aContent)->HasValidDimensions();
nsSVGGFrame::Init(aContent, aParent, aPrevInFlow);
}
nsresult
nsSVGUseFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
SVGUseElement *useElement = static_cast<SVGUseElement*>(mContent);
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
nsLayoutUtils::PostRestyleEvent(
useElement, nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
nsSVGUtils::ScheduleReflowSVG(this);
nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
} else if (aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::height) {
bool invalidate = false;
if (mHasValidDimensions != useElement->HasValidDimensions()) {
mHasValidDimensions = !mHasValidDimensions;
invalidate = true;
}
if (useElement->OurWidthAndHeightAreUsed()) {
invalidate = true;
useElement->SyncWidthOrHeight(aAttribute);
}
if (invalidate) {
nsLayoutUtils::PostRestyleEvent(
useElement, nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
nsSVGUtils::ScheduleReflowSVG(this);
}
}
}
if ((aNameSpaceID == kNameSpaceID_XLink ||
aNameSpaceID == kNameSpaceID_None) &&
aAttribute == nsGkAtoms::href) {
// we're changing our nature, clear out the clone information
nsLayoutUtils::PostRestyleEvent(
useElement, nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
nsSVGUtils::ScheduleReflowSVG(this);
useElement->mOriginal = nullptr;
useElement->UnlinkSource();
useElement->TriggerReclone();
}
return nsSVGGFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void
nsSVGUseFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
RefPtr<SVGUseElement> use = static_cast<SVGUseElement*>(mContent);
nsSVGGFrame::DestroyFrom(aDestructRoot);
use->DestroyAnonymousContent();
}
bool
nsSVGUseFrame::IsLeaf() const
{
return true;
}
//----------------------------------------------------------------------
// nsISVGChildFrame methods
void
nsSVGUseFrame::ReflowSVG()
{
// We only handle x/y offset here, since any width/height that is in force is
// handled by the nsSVGOuterSVGFrame for the anonymous <svg> that will be
// created for that purpose.
float x, y;
static_cast<SVGUseElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, nullptr);
mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(
gfxRect(x, y, 0.0, 0.0),
PresContext()->AppUnitsPerCSSPixel()).TopLeft());
// 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();
}
nsSVGGFrame::ReflowSVG();
}
void
nsSVGUseFrame::NotifySVGChanged(uint32_t aFlags)
{
if (aFlags & COORD_CONTEXT_CHANGED &&
!(aFlags & TRANSFORM_CHANGED)) {
// Coordinate context changes affect mCanvasTM if we have a
// percentage 'x' or 'y'
SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
if (use->mLengthAttributes[SVGUseElement::ATTR_X].IsPercentage() ||
use->mLengthAttributes[SVGUseElement::ATTR_Y].IsPercentage()) {
aFlags |= TRANSFORM_CHANGED;
// 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);
}
}
// We don't remove the TRANSFORM_CHANGED flag here if we have a viewBox or
// non-percentage width/height, since if they're set then they are cloned to
// an anonymous child <svg>, and its nsSVGInnerSVGFrame will do that.
nsSVGGFrame::NotifySVGChanged(aFlags);
}
//----------------------------------------------------------------------
// nsIAnonymousContentCreator methods:
nsresult
nsSVGUseFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
nsIContent* clone = use->CreateAnonymousContent();
nsLayoutUtils::PostRestyleEvent(
use, nsRestyleHint(0), nsChangeHint_InvalidateRenderingObservers);
if (!clone)
return NS_ERROR_FAILURE;
if (!aElements.AppendElement(clone))
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
void
nsSVGUseFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter)
{
SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
nsIContent* clone = use->GetAnonymousContent();
if (clone) {
aElements.AppendElement(clone);
}
}
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