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bc834ae5bc813a8f0905cfbf318b2d741323369b
tubestation/layout/svg/nsSVGForeignObjectFrame.cpp
cku fab206ec78 Bug 1351440 - Part 2. Encapsulate DrawResult and imgIContainer::FLAG_* into imgDrawingParams, and pass it to PaintSVG. r=jwatt 
The DrawResult return was not in fact anything to do with the success or
failure of that method, but was actually passing out a very specific piece of information
about the success or failure of any imagelib drawing that may not have occurred
under the various PaintSVG calls.

The signature of PaintSVG is changed from
  DrawResult PaintSVG(...., uint32 flags);
to
  void PaintSVG(...., imgDrawingParams& aPackage);

imgDrawingParams wraps DrawResult and imgIContainer::FLAG_* as a pack, pass through
PaintSVG to imagelib draw calls under beneath.

MozReview-Commit-ID: IOq2evUAOQF
2017-05-05 17:19:43 +08:00

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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/. */
// Main header first:
#include "nsSVGForeignObjectFrame.h"
// Keep others in (case-insensitive) order:
#include "DrawResult.h"
#include "gfxContext.h"
#include "nsDisplayList.h"
#include "nsGkAtoms.h"
#include "nsNameSpaceManager.h"
#include "nsLayoutUtils.h"
#include "nsRegion.h"
#include "nsRenderingContext.h"
#include "nsSVGContainerFrame.h"
#include "nsSVGEffects.h"
#include "mozilla/dom/SVGForeignObjectElement.h"
#include "nsSVGIntegrationUtils.h"
#include "nsSVGOuterSVGFrame.h"
#include "nsSVGUtils.h"
#include "mozilla/AutoRestore.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::image;
//----------------------------------------------------------------------
// Implementation
nsContainerFrame*
NS_NewSVGForeignObjectFrame(nsIPresShell *aPresShell,
nsStyleContext *aContext)
{
return new (aPresShell) nsSVGForeignObjectFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsSVGForeignObjectFrame)
nsSVGForeignObjectFrame::nsSVGForeignObjectFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext, LayoutFrameType::SVGForeignObject)
, mInReflow(false)
{
AddStateBits(NS_FRAME_REFLOW_ROOT | NS_FRAME_MAY_BE_TRANSFORMED |
NS_FRAME_SVG_LAYOUT);
}
//----------------------------------------------------------------------
// nsIFrame methods
NS_QUERYFRAME_HEAD(nsSVGForeignObjectFrame)
NS_QUERYFRAME_ENTRY(nsSVGDisplayableFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
void
nsSVGForeignObjectFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::foreignObject),
"Content is not an SVG foreignObject!");
nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD);
AddStateBits(NS_FRAME_FONT_INFLATION_CONTAINER |
NS_FRAME_FONT_INFLATION_FLOW_ROOT);
if (!(mState & NS_FRAME_IS_NONDISPLAY)) {
nsSVGUtils::GetOuterSVGFrame(this)->RegisterForeignObject(this);
}
}
void nsSVGForeignObjectFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
// Only unregister if we registered in the first place:
if (!(mState & NS_FRAME_IS_NONDISPLAY)) {
nsSVGUtils::GetOuterSVGFrame(this)->UnregisterForeignObject(this);
}
nsContainerFrame::DestroyFrom(aDestructRoot);
}
nsresult
nsSVGForeignObjectFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom *aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::height) {
nsLayoutUtils::PostRestyleEvent(
mContent->AsElement(), nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
nsSVGUtils::ScheduleReflowSVG(this);
// XXXjwatt: why mark intrinsic widths dirty? can't we just use eResize?
RequestReflow(nsIPresShell::eStyleChange);
} else if (aAttribute == nsGkAtoms::x ||
aAttribute == nsGkAtoms::y) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
nsLayoutUtils::PostRestyleEvent(
mContent->AsElement(), nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
nsSVGUtils::ScheduleReflowSVG(this);
} else if (aAttribute == nsGkAtoms::transform) {
// 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.
mCanvasTM = nullptr;
} else if (aAttribute == nsGkAtoms::viewBox ||
aAttribute == nsGkAtoms::preserveAspectRatio) {
nsLayoutUtils::PostRestyleEvent(
mContent->AsElement(), nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
}
}
return NS_OK;
}
void
nsSVGForeignObjectFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
"Should not have been called");
// Only InvalidateAndScheduleBoundsUpdate marks us with NS_FRAME_IS_DIRTY,
// so if that bit is still set we still have a resize pending. If we hit
// this assertion, then we should get the presShell to skip reflow roots
// that have a dirty parent since a reflow is going to come via the
// reflow root's parent anyway.
NS_ASSERTION(!(GetStateBits() & NS_FRAME_IS_DIRTY),
"Reflowing while a resize is pending is wasteful");
// ReflowSVG makes sure mRect is up to date before we're called.
NS_ASSERTION(!aReflowInput.mParentReflowInput,
"should only get reflow from being reflow root");
NS_ASSERTION(aReflowInput.ComputedWidth() == GetSize().width &&
aReflowInput.ComputedHeight() == GetSize().height,
"reflow roots should be reflowed at existing size and "
"svg.css should ensure we have no padding/border/margin");
DoReflow();
WritingMode wm = aReflowInput.GetWritingMode();
LogicalSize finalSize(wm, aReflowInput.ComputedISize(),
aReflowInput.ComputedBSize());
aDesiredSize.SetSize(wm, finalSize);
aDesiredSize.SetOverflowAreasToDesiredBounds();
aStatus.Reset();
}
void
nsSVGForeignObjectFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!static_cast<const nsSVGElement*>(mContent)->HasValidDimensions()) {
return;
}
DisplayOutline(aBuilder, aLists);
BuildDisplayListForNonBlockChildren(aBuilder, aDirtyRect, aLists);
}
bool
nsSVGForeignObjectFrame::IsSVGTransformed(Matrix *aOwnTransform,
Matrix *aFromParentTransform) const
{
bool foundTransform = false;
// Check if our parent has children-only transforms:
nsIFrame *parent = GetParent();
if (parent &&
parent->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer)) {
foundTransform = static_cast<nsSVGContainerFrame*>(parent)->
HasChildrenOnlyTransform(aFromParentTransform);
}
nsSVGElement *content = static_cast<nsSVGElement*>(mContent);
nsSVGAnimatedTransformList* transformList =
content->GetAnimatedTransformList();
if ((transformList && transformList->HasTransform()) ||
content->GetAnimateMotionTransform()) {
if (aOwnTransform) {
*aOwnTransform = gfx::ToMatrix(content->PrependLocalTransformsTo(
gfxMatrix(),
eUserSpaceToParent));
}
foundTransform = true;
}
return foundTransform;
}
void
nsSVGForeignObjectFrame::PaintSVG(gfxContext& aContext,
const gfxMatrix& aTransform,
imgDrawingParams& aImgParams,
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");
if (IsDisabled()) {
return;
}
nsIFrame* kid = PrincipalChildList().FirstChild();
if (!kid) {
return;
}
if (aTransform.IsSingular()) {
NS_WARNING("Can't render foreignObject element!");
return;
}
nsRect kidDirtyRect = kid->GetVisualOverflowRect();
/* Check if we need to draw anything. */
if (aDirtyRect) {
NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
(mState & NS_FRAME_IS_NONDISPLAY),
"Display lists handle dirty rect intersection test");
// Transform the dirty rect into app units in our userspace.
gfxMatrix invmatrix = aTransform;
DebugOnly<bool> ok = invmatrix.Invert();
NS_ASSERTION(ok, "inverse of non-singular matrix should be non-singular");
gfxRect transDirtyRect = gfxRect(aDirtyRect->x, aDirtyRect->y,
aDirtyRect->width, aDirtyRect->height);
transDirtyRect = invmatrix.TransformBounds(transDirtyRect);
kidDirtyRect.IntersectRect(kidDirtyRect,
nsLayoutUtils::RoundGfxRectToAppRect(transDirtyRect,
PresContext()->AppUnitsPerCSSPixel()));
// XXX after bug 614732 is fixed, we will compare mRect with aDirtyRect,
// not with kidDirtyRect. I.e.
// int32_t appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
// mRect.ToOutsidePixels(appUnitsPerDevPx).Intersects(*aDirtyRect)
if (kidDirtyRect.IsEmpty())
return;
}
aContext.Save();
if (StyleDisplay()->IsScrollableOverflow()) {
float x, y, width, height;
static_cast<nsSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
gfxRect clipRect =
nsSVGUtils::GetClipRectForFrame(this, 0.0f, 0.0f, width, height);
nsSVGUtils::SetClipRect(&aContext, aTransform, clipRect);
}
// SVG paints in CSS px, but normally frames paint in dev pixels. Here we
// multiply a CSS-px-to-dev-pixel factor onto aTransform so our children
// paint correctly.
float cssPxPerDevPx = PresContext()->
AppUnitsToFloatCSSPixels(PresContext()->AppUnitsPerDevPixel());
gfxMatrix canvasTMForChildren = aTransform;
canvasTMForChildren.Scale(cssPxPerDevPx, cssPxPerDevPx);
aContext.Multiply(canvasTMForChildren);
using PaintFrameFlags = nsLayoutUtils::PaintFrameFlags;
PaintFrameFlags flags = PaintFrameFlags::PAINT_IN_TRANSFORM;
if (SVGAutoRenderState::IsPaintingToWindow(aContext.GetDrawTarget())) {
flags |= PaintFrameFlags::PAINT_TO_WINDOW;
}
if (aImgParams.imageFlags & imgIContainer::FLAG_SYNC_DECODE) {
flags |= PaintFrameFlags::PAINT_SYNC_DECODE_IMAGES;
}
nsRenderingContext rendCtx(&aContext);
Unused << nsLayoutUtils::PaintFrame(&rendCtx, kid, nsRegion(kidDirtyRect),
NS_RGBA(0,0,0,0),
nsDisplayListBuilderMode::PAINTING,
flags);
aContext.Restore();
}
nsIFrame*
nsSVGForeignObjectFrame::GetFrameForPoint(const gfxPoint& aPoint)
{
NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
(mState & NS_FRAME_IS_NONDISPLAY),
"If display lists are enabled, only hit-testing of a "
"clipPath's contents should take this code path");
if (IsDisabled() || (GetStateBits() & NS_FRAME_IS_NONDISPLAY))
return nullptr;
nsIFrame* kid = PrincipalChildList().FirstChild();
if (!kid)
return nullptr;
float x, y, width, height;
static_cast<nsSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
if (!gfxRect(x, y, width, height).Contains(aPoint) ||
!nsSVGUtils::HitTestClip(this, aPoint)) {
return nullptr;
}
// Convert the point to app units relative to the top-left corner of the
// viewport that's established by the foreignObject element:
gfxPoint pt = (aPoint + gfxPoint(x, y)) * nsPresContext::AppUnitsPerCSSPixel();
nsPoint point = nsPoint(NSToIntRound(pt.x), NSToIntRound(pt.y));
return nsLayoutUtils::GetFrameForPoint(kid, point);
}
void
nsSVGForeignObjectFrame::ReflowSVG()
{
NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
"This call is probably a wasteful mistake");
MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
"ReflowSVG mechanism not designed for this");
if (!nsSVGUtils::NeedsReflowSVG(this)) {
return;
}
// We update mRect before the DoReflow call so that DoReflow uses the
// correct dimensions:
float x, y, w, h;
static_cast<SVGForeignObjectElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
// If mRect's width or height are negative, reflow blows up! We must clamp!
if (w < 0.0f) w = 0.0f;
if (h < 0.0f) h = 0.0f;
mRect = nsLayoutUtils::RoundGfxRectToAppRect(
gfxRect(x, y, w, h),
PresContext()->AppUnitsPerCSSPixel());
// Fully mark our kid dirty so that it gets resized if necessary
// (NS_FRAME_HAS_DIRTY_CHILDREN isn't enough in that case):
nsIFrame* kid = PrincipalChildList().FirstChild();
kid->AddStateBits(NS_FRAME_IS_DIRTY);
// Make sure to not allow interrupts if we're not being reflown as a root:
nsPresContext::InterruptPreventer noInterrupts(PresContext());
DoReflow();
if (mState & NS_FRAME_FIRST_REFLOW) {
// Make sure we have our filter property (if any) before calling
// FinishAndStoreOverflow (subsequent filter changes are handled off
// nsChangeHint_UpdateEffects):
nsSVGEffects::UpdateEffects(this);
}
// 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();
}
// TODO: once we support |overflow:visible| on foreignObject, then we will
// need to take account of our descendants here.
nsRect overflow = nsRect(nsPoint(0,0), mRect.Size());
nsOverflowAreas overflowAreas(overflow, overflow);
FinishAndStoreOverflow(overflowAreas, mRect.Size());
// Now unset the various reflow bits:
mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
}
void
nsSVGForeignObjectFrame::NotifySVGChanged(uint32_t aFlags)
{
MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
"Invalidation logic may need adjusting");
bool needNewBounds = false; // i.e. mRect or visual overflow rect
bool needReflow = false;
bool needNewCanvasTM = false;
if (aFlags & COORD_CONTEXT_CHANGED) {
SVGForeignObjectElement *fO =
static_cast<SVGForeignObjectElement*>(mContent);
// Coordinate context changes affect mCanvasTM if we have a
// percentage 'x' or 'y'
if (fO->mLengthAttributes[SVGForeignObjectElement::ATTR_X].IsPercentage() ||
fO->mLengthAttributes[SVGForeignObjectElement::ATTR_Y].IsPercentage()) {
needNewBounds = true;
needNewCanvasTM = true;
}
// Our coordinate context's width/height has changed. If we have a
// percentage width/height our dimensions will change so we must reflow.
if (fO->mLengthAttributes[SVGForeignObjectElement::ATTR_WIDTH].IsPercentage() ||
fO->mLengthAttributes[SVGForeignObjectElement::ATTR_HEIGHT].IsPercentage()) {
needNewBounds = true;
needReflow = true;
}
}
if (aFlags & TRANSFORM_CHANGED) {
if (mCanvasTM && mCanvasTM->IsSingular()) {
needNewBounds = true; // old bounds are bogus
}
needNewCanvasTM = true;
// In an ideal world we would reflow when our CTM changes. This is because
// glyph metrics do not necessarily scale uniformly with change in scale
// and, as a result, CTM changes may require text to break at different
// points. The problem would be how to keep performance acceptable when
// e.g. the transform of an ancestor is animated.
// We also seem to get some sort of infinite loop post bug 421584 if we
// reflow.
}
if (needNewBounds) {
// 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.
nsSVGUtils::ScheduleReflowSVG(this);
}
// If we're called while the PresShell is handling reflow events then we
// must have been called as a result of the NotifyViewportChange() call in
// our nsSVGOuterSVGFrame's Reflow() method. We must not call RequestReflow
// at this point (i.e. during reflow) because it could confuse the
// PresShell and prevent it from reflowing us properly in future. Besides
// that, nsSVGOuterSVGFrame::DidReflow will take care of reflowing us
// synchronously, so there's no need.
if (needReflow && !PresContext()->PresShell()->IsReflowLocked()) {
RequestReflow(nsIPresShell::eResize);
}
if (needNewCanvasTM) {
// Do this after calling InvalidateAndScheduleBoundsUpdate in case we
// change the code and it needs to use it.
mCanvasTM = nullptr;
}
}
SVGBBox
nsSVGForeignObjectFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
uint32_t aFlags)
{
SVGForeignObjectElement *content =
static_cast<SVGForeignObjectElement*>(mContent);
float x, y, w, h;
content->GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
if (w < 0.0f) w = 0.0f;
if (h < 0.0f) h = 0.0f;
if (aToBBoxUserspace.IsSingular()) {
// XXX ReportToConsole
return SVGBBox();
}
return aToBBoxUserspace.TransformBounds(gfx::Rect(0.0, 0.0, w, h));
}
//----------------------------------------------------------------------
gfxMatrix
nsSVGForeignObjectFrame::GetCanvasTM()
{
if (!mCanvasTM) {
NS_ASSERTION(GetParent(), "null parent");
nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
SVGForeignObjectElement *content =
static_cast<SVGForeignObjectElement*>(mContent);
gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
mCanvasTM = new gfxMatrix(tm);
}
return *mCanvasTM;
}
//----------------------------------------------------------------------
// Implementation helpers
void nsSVGForeignObjectFrame::RequestReflow(nsIPresShell::IntrinsicDirty aType)
{
if (GetStateBits() & NS_FRAME_FIRST_REFLOW)
// If we haven't had a ReflowSVG() yet, nothing to do.
return;
nsIFrame* kid = PrincipalChildList().FirstChild();
if (!kid)
return;
PresContext()->PresShell()->FrameNeedsReflow(kid, aType, NS_FRAME_IS_DIRTY);
}
void
nsSVGForeignObjectFrame::DoReflow()
{
MarkInReflow();
// Skip reflow if we're zero-sized, unless this is our first reflow.
if (IsDisabled() &&
!(GetStateBits() & NS_FRAME_FIRST_REFLOW))
return;
nsPresContext *presContext = PresContext();
nsIFrame* kid = PrincipalChildList().FirstChild();
if (!kid)
return;
// initiate a synchronous reflow here and now:
nsRenderingContext renderingContext(
presContext->PresShell()->CreateReferenceRenderingContext());
mInReflow = true;
WritingMode wm = kid->GetWritingMode();
ReflowInput reflowInput(presContext, kid,
&renderingContext,
LogicalSize(wm, ISize(wm),
NS_UNCONSTRAINEDSIZE));
ReflowOutput desiredSize(reflowInput);
nsReflowStatus status;
// We don't use mRect.height above because that tells the child to do
// page/column breaking at that height.
NS_ASSERTION(reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) &&
reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0),
"style system should ensure that :-moz-svg-foreign-content "
"does not get styled");
NS_ASSERTION(reflowInput.ComputedISize() == ISize(wm),
"reflow state made child wrong size");
reflowInput.SetComputedBSize(BSize(wm));
ReflowChild(kid, presContext, desiredSize, reflowInput, 0, 0,
NS_FRAME_NO_MOVE_FRAME, status);
NS_ASSERTION(mRect.width == desiredSize.Width() &&
mRect.height == desiredSize.Height(), "unexpected size");
FinishReflowChild(kid, presContext, desiredSize, &reflowInput, 0, 0,
NS_FRAME_NO_MOVE_FRAME);
mInReflow = false;
}
nsRect
nsSVGForeignObjectFrame::GetInvalidRegion()
{
MOZ_ASSERT(!NS_SVGDisplayListPaintingEnabled(),
"Only called by nsDisplayOuterSVG code");
nsIFrame* kid = PrincipalChildList().FirstChild();
if (kid->HasInvalidFrameInSubtree()) {
gfxRect r(mRect.x, mRect.y, mRect.width, mRect.height);
r.Scale(1.0 / nsPresContext::AppUnitsPerCSSPixel());
nsRect rect = nsSVGUtils::ToCanvasBounds(r, GetCanvasTM(), PresContext());
rect = nsSVGUtils::GetPostFilterVisualOverflowRect(this, rect);
return rect;
}
return nsRect();
}
void
nsSVGForeignObjectFrame::DoUpdateStyleOfOwnedAnonBoxes(
ServoStyleSet& aStyleSet,
nsStyleChangeList& aChangeList,
nsChangeHint aHintForThisFrame)
{
MOZ_ASSERT(PrincipalChildList().FirstChild(), "Must have our anon box");
UpdateStyleOfChildAnonBox(PrincipalChildList().FirstChild(),
aStyleSet, aChangeList, aHintForThisFrame);
}
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