зеркало из https://github.com/mozilla/gecko-dev.git
274 строки
10 KiB
C++
274 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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 "SVGViewportFrame.h"
|
|
|
|
// Keep others in (case-insensitive) order:
|
|
#include "gfx2DGlue.h"
|
|
#include "gfxContext.h"
|
|
#include "nsIFrame.h"
|
|
#include "mozilla/ISVGDisplayableFrame.h"
|
|
#include "mozilla/SVGContainerFrame.h"
|
|
#include "mozilla/SVGUtils.h"
|
|
#include "mozilla/dom/SVGViewportElement.h"
|
|
|
|
using namespace mozilla::dom;
|
|
using namespace mozilla::gfx;
|
|
using namespace mozilla::image;
|
|
|
|
namespace mozilla {
|
|
|
|
//----------------------------------------------------------------------
|
|
// ISVGDisplayableFrame methods
|
|
|
|
void SVGViewportFrame::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");
|
|
|
|
gfxContextAutoSaveRestore autoSR;
|
|
|
|
if (StyleDisplay()->IsScrollableOverflow()) {
|
|
float x, y, width, height;
|
|
static_cast<SVGViewportElement*>(GetContent())
|
|
->GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
|
|
|
|
if (width <= 0 || height <= 0) {
|
|
return;
|
|
}
|
|
|
|
autoSR.SetContext(&aContext);
|
|
gfxRect clipRect = SVGUtils::GetClipRectForFrame(this, x, y, width, height);
|
|
SVGUtils::SetClipRect(&aContext, aTransform, clipRect);
|
|
}
|
|
|
|
SVGDisplayContainerFrame::PaintSVG(aContext, aTransform, aImgParams,
|
|
aDirtyRect);
|
|
}
|
|
|
|
void SVGViewportFrame::ReflowSVG() {
|
|
// mRect must be set before FinishAndStoreOverflow is called in order
|
|
// for our overflow areas to be clipped correctly.
|
|
float x, y, width, height;
|
|
static_cast<SVGViewportElement*>(GetContent())
|
|
->GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
|
|
mRect = nsLayoutUtils::RoundGfxRectToAppRect(gfxRect(x, y, width, height),
|
|
AppUnitsPerCSSPixel());
|
|
|
|
// 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();
|
|
}
|
|
|
|
SVGDisplayContainerFrame::ReflowSVG();
|
|
}
|
|
|
|
void SVGViewportFrame::NotifySVGChanged(uint32_t aFlags) {
|
|
MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
|
|
"Invalidation logic may need adjusting");
|
|
|
|
if (aFlags & COORD_CONTEXT_CHANGED) {
|
|
SVGViewportElement* svg = static_cast<SVGViewportElement*>(GetContent());
|
|
|
|
bool xOrYIsPercentage =
|
|
svg->mLengthAttributes[SVGViewportElement::ATTR_X].IsPercentage() ||
|
|
svg->mLengthAttributes[SVGViewportElement::ATTR_Y].IsPercentage();
|
|
bool widthOrHeightIsPercentage =
|
|
svg->mLengthAttributes[SVGViewportElement::ATTR_WIDTH].IsPercentage() ||
|
|
svg->mLengthAttributes[SVGViewportElement::ATTR_HEIGHT].IsPercentage();
|
|
|
|
if (xOrYIsPercentage || widthOrHeightIsPercentage) {
|
|
// 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.
|
|
SVGUtils::ScheduleReflowSVG(this);
|
|
}
|
|
|
|
// Coordinate context changes affect mCanvasTM if we have a
|
|
// percentage 'x' or 'y', or if we have a percentage 'width' or 'height' AND
|
|
// a 'viewBox'.
|
|
|
|
if (!(aFlags & TRANSFORM_CHANGED) &&
|
|
(xOrYIsPercentage ||
|
|
(widthOrHeightIsPercentage && svg->HasViewBox()))) {
|
|
aFlags |= TRANSFORM_CHANGED;
|
|
}
|
|
|
|
if (svg->HasViewBox() || !widthOrHeightIsPercentage) {
|
|
// Remove COORD_CONTEXT_CHANGED, since we establish the coordinate
|
|
// context for our descendants and this notification won't change its
|
|
// dimensions:
|
|
aFlags &= ~COORD_CONTEXT_CHANGED;
|
|
|
|
if (!aFlags) {
|
|
return; // No notification flags left
|
|
}
|
|
}
|
|
}
|
|
|
|
SVGDisplayContainerFrame::NotifySVGChanged(aFlags);
|
|
}
|
|
|
|
SVGBBox SVGViewportFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace,
|
|
uint32_t aFlags) {
|
|
// XXXjwatt It seems like authors would want the result to be clipped by the
|
|
// viewport we establish if IsScrollableOverflow() is true. We should
|
|
// consider doing that. See bug 1350755.
|
|
|
|
SVGBBox bbox;
|
|
|
|
if (aFlags & SVGUtils::eForGetClientRects) {
|
|
// XXXjwatt For consistency with the old code this code includes the
|
|
// viewport we establish in the result, but only includes the bounds of our
|
|
// descendants if they are not clipped to that viewport. However, this is
|
|
// both inconsistent with Chrome and with the specs. See bug 1350755.
|
|
// Ideally getClientRects/getBoundingClientRect should be consistent with
|
|
// getBBox.
|
|
float x, y, w, h;
|
|
static_cast<SVGViewportElement*>(GetContent())
|
|
->GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
|
|
if (w < 0.0f) w = 0.0f;
|
|
if (h < 0.0f) h = 0.0f;
|
|
Rect viewport(x, y, w, h);
|
|
bbox = aToBBoxUserspace.TransformBounds(viewport);
|
|
if (StyleDisplay()->IsScrollableOverflow()) {
|
|
return bbox;
|
|
}
|
|
// Else we're not clipping to our viewport so we fall through and include
|
|
// the bounds of our children.
|
|
}
|
|
|
|
SVGBBox descendantsBbox =
|
|
SVGDisplayContainerFrame::GetBBoxContribution(aToBBoxUserspace, aFlags);
|
|
|
|
bbox.UnionEdges(descendantsBbox);
|
|
|
|
return bbox;
|
|
}
|
|
|
|
nsresult SVGViewportFrame::AttributeChanged(int32_t aNameSpaceID,
|
|
nsAtom* aAttribute,
|
|
int32_t aModType) {
|
|
if (aNameSpaceID == kNameSpaceID_None &&
|
|
!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
|
|
SVGViewportElement* content =
|
|
static_cast<SVGViewportElement*>(GetContent());
|
|
|
|
if (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height) {
|
|
nsLayoutUtils::PostRestyleEvent(
|
|
mContent->AsElement(), RestyleHint{0},
|
|
nsChangeHint_InvalidateRenderingObservers);
|
|
SVGUtils::ScheduleReflowSVG(this);
|
|
|
|
if (content->HasViewBoxOrSyntheticViewBox()) {
|
|
// make sure our cached transform matrix gets (lazily) updated
|
|
mCanvasTM = nullptr;
|
|
content->ChildrenOnlyTransformChanged();
|
|
SVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
|
|
} else {
|
|
uint32_t flags = COORD_CONTEXT_CHANGED;
|
|
if (mCanvasTM && mCanvasTM->IsSingular()) {
|
|
mCanvasTM = nullptr;
|
|
flags |= TRANSFORM_CHANGED;
|
|
}
|
|
SVGUtils::NotifyChildrenOfSVGChange(this, flags);
|
|
}
|
|
|
|
} else if (aAttribute == nsGkAtoms::transform ||
|
|
aAttribute == nsGkAtoms::preserveAspectRatio ||
|
|
aAttribute == nsGkAtoms::viewBox || aAttribute == nsGkAtoms::x ||
|
|
aAttribute == nsGkAtoms::y) {
|
|
// make sure our cached transform matrix gets (lazily) updated
|
|
mCanvasTM = nullptr;
|
|
|
|
SVGUtils::NotifyChildrenOfSVGChange(
|
|
this, aAttribute == nsGkAtoms::viewBox
|
|
? TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED
|
|
: TRANSFORM_CHANGED);
|
|
|
|
// 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.
|
|
|
|
if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) {
|
|
nsLayoutUtils::PostRestyleEvent(
|
|
mContent->AsElement(), RestyleHint{0},
|
|
nsChangeHint_InvalidateRenderingObservers);
|
|
SVGUtils::ScheduleReflowSVG(this);
|
|
} else if (aAttribute == nsGkAtoms::viewBox ||
|
|
(aAttribute == nsGkAtoms::preserveAspectRatio &&
|
|
content->HasViewBoxOrSyntheticViewBox())) {
|
|
content->ChildrenOnlyTransformChanged();
|
|
// SchedulePaint sets a global state flag so we only need to call it
|
|
// once (on ourself is fine), not once on each child (despite bug
|
|
// 828240).
|
|
SchedulePaint();
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame* SVGViewportFrame::GetFrameForPoint(const gfxPoint& aPoint) {
|
|
NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
|
|
(mState & NS_FRAME_IS_NONDISPLAY),
|
|
"If display lists are enabled, only hit-testing of non-display "
|
|
"SVG should take this code path");
|
|
|
|
if (StyleDisplay()->IsScrollableOverflow()) {
|
|
Rect clip;
|
|
static_cast<SVGElement*>(GetContent())
|
|
->GetAnimatedLengthValues(&clip.x, &clip.y, &clip.width, &clip.height,
|
|
nullptr);
|
|
if (!clip.Contains(ToPoint(aPoint))) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return SVGDisplayContainerFrame::GetFrameForPoint(aPoint);
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// ISVGSVGFrame methods:
|
|
|
|
void SVGViewportFrame::NotifyViewportOrTransformChanged(uint32_t aFlags) {
|
|
// The dimensions of inner-<svg> frames are purely defined by their "width"
|
|
// and "height" attributes, and transform changes can only occur as a result
|
|
// of changes to their "width", "height", "viewBox" or "preserveAspectRatio"
|
|
// attributes. Changes to all of these attributes are handled in
|
|
// AttributeChanged(), so we should never be called.
|
|
NS_ERROR("Not called for SVGViewportFrame");
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// SVGContainerFrame methods:
|
|
|
|
bool SVGViewportFrame::HasChildrenOnlyTransform(gfx::Matrix* aTransform) const {
|
|
SVGViewportElement* content = static_cast<SVGViewportElement*>(GetContent());
|
|
|
|
if (content->HasViewBoxOrSyntheticViewBox()) {
|
|
// XXX Maybe return false if the transform is the identity transform?
|
|
if (aTransform) {
|
|
*aTransform = content->GetViewBoxTransform();
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
} // namespace mozilla
|