Add m-esr52 at 52.6.0

1 files changed, 322 insertions, 0 deletions

diff --git a/layout/svg/nsSVGInnerSVGFrame.cpp b/layout/svg/nsSVGInnerSVGFrame.cpp
new file mode 100644
index 0000000000..8b5750d167
--- /dev/null
+++ b/layout/svg/nsSVGInnerSVGFrame.cpp
@@ -0,0 +1,322 @@
+/* -*- 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 "nsSVGInnerSVGFrame.h"
+
+// Keep others in (case-insensitive) order:
+#include "gfx2DGlue.h"
+#include "gfxContext.h"
+#include "nsIFrame.h"
+#include "nsISVGChildFrame.h"
+#include "nsSVGContainerFrame.h"
+#include "nsSVGIntegrationUtils.h"
+#include "mozilla/dom/SVGSVGElement.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+using namespace mozilla::image;
+
+nsIFrame*
+NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) nsSVGInnerSVGFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGInnerSVGFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods
+
+NS_QUERYFRAME_HEAD(nsSVGInnerSVGFrame)
+  NS_QUERYFRAME_ENTRY(nsSVGInnerSVGFrame)
+  NS_QUERYFRAME_ENTRY(nsISVGSVGFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsSVGDisplayContainerFrame)
+
+#ifdef DEBUG
+void
+nsSVGInnerSVGFrame::Init(nsIContent*       aContent,
+                         nsContainerFrame* aParent,
+                         nsIFrame*         aPrevInFlow)
+{
+  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svg),
+               "Content is not an SVG 'svg' element!");
+
+  nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsIAtom *
+nsSVGInnerSVGFrame::GetType() const
+{
+  return nsGkAtoms::svgInnerSVGFrame;
+}
+
+//----------------------------------------------------------------------
+// nsISVGChildFrame methods
+
+DrawResult
+nsSVGInnerSVGFrame::PaintSVG(gfxContext& aContext,
+                             const gfxMatrix& aTransform,
+                             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<SVGSVGElement*>(mContent)->
+      GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
+
+    if (width <= 0 || height <= 0) {
+      return DrawResult::SUCCESS;
+    }
+
+    autoSR.SetContext(&aContext);
+    gfxRect clipRect =
+      nsSVGUtils::GetClipRectForFrame(this, x, y, width, height);
+    nsSVGUtils::SetClipRect(&aContext, aTransform, clipRect);
+  }
+
+  return nsSVGDisplayContainerFrame::PaintSVG(aContext, aTransform, aDirtyRect);
+}
+
+nsRect
+nsSVGInnerSVGFrame::GetCoveredRegion()
+{
+  float x, y, w, h;
+  static_cast<SVGSVGElement*>(mContent)->
+    GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
+  if (w < 0.0f) w = 0.0f;
+  if (h < 0.0f) h = 0.0f;
+  // GetCanvasTM includes the x,y translation
+  nsRect bounds = nsSVGUtils::ToCanvasBounds(gfxRect(0.0, 0.0, w, h),
+                                             GetCanvasTM(),
+                                             PresContext());
+
+  if (!StyleDisplay()->IsScrollableOverflow()) {
+    bounds.UnionRect(bounds, nsSVGUtils::GetCoveredRegion(mFrames));
+  }
+  return bounds;
+}
+
+void
+nsSVGInnerSVGFrame::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<SVGSVGElement*>(mContent)->
+    GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
+  mRect = nsLayoutUtils::RoundGfxRectToAppRect(
+                           gfxRect(x, y, width, height),
+                           PresContext()->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();
+  }
+
+  nsSVGDisplayContainerFrame::ReflowSVG();
+}
+
+void
+nsSVGInnerSVGFrame::NotifySVGChanged(uint32_t aFlags)
+{
+  MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
+             "Invalidation logic may need adjusting");
+
+  if (aFlags & COORD_CONTEXT_CHANGED) {
+
+    SVGSVGElement *svg = static_cast<SVGSVGElement*>(mContent);
+
+    bool xOrYIsPercentage =
+      svg->mLengthAttributes[SVGSVGElement::ATTR_X].IsPercentage() ||
+      svg->mLengthAttributes[SVGSVGElement::ATTR_Y].IsPercentage();
+    bool widthOrHeightIsPercentage =
+      svg->mLengthAttributes[SVGSVGElement::ATTR_WIDTH].IsPercentage() ||
+      svg->mLengthAttributes[SVGSVGElement::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.
+      nsSVGUtils::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->HasViewBoxRect()))) {
+      aFlags |= TRANSFORM_CHANGED;
+    }
+
+    if (svg->HasViewBoxRect() || !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
+      }
+    }
+  }
+
+  if (aFlags & TRANSFORM_CHANGED) {
+    // make sure our cached transform matrix gets (lazily) updated
+    mCanvasTM = nullptr;
+  }
+
+  nsSVGDisplayContainerFrame::NotifySVGChanged(aFlags);
+}
+
+nsresult
+nsSVGInnerSVGFrame::AttributeChanged(int32_t  aNameSpaceID,
+                                     nsIAtom* aAttribute,
+                                     int32_t  aModType)
+{
+  if (aNameSpaceID == kNameSpaceID_None &&
+      !(GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
+
+    SVGSVGElement* content = static_cast<SVGSVGElement*>(mContent);
+
+    if (aAttribute == nsGkAtoms::width ||
+        aAttribute == nsGkAtoms::height) {
+      nsLayoutUtils::PostRestyleEvent(
+        mContent->AsElement(), nsRestyleHint(0),
+        nsChangeHint_InvalidateRenderingObservers);
+      nsSVGUtils::ScheduleReflowSVG(this);
+
+      if (content->HasViewBoxOrSyntheticViewBox()) {
+        // make sure our cached transform matrix gets (lazily) updated
+        mCanvasTM = nullptr;
+        content->ChildrenOnlyTransformChanged();
+        nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
+      } else {
+        uint32_t flags = COORD_CONTEXT_CHANGED;
+        if (mCanvasTM && mCanvasTM->IsSingular()) {
+          mCanvasTM = nullptr;
+          flags |= TRANSFORM_CHANGED;
+        }
+        nsSVGUtils::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;
+
+      nsSVGUtils::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(), nsRestyleHint(0),
+          nsChangeHint_InvalidateRenderingObservers);
+        nsSVGUtils::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*
+nsSVGInnerSVGFrame::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<nsSVGElement*>(mContent)->
+      GetAnimatedLengthValues(&clip.x, &clip.y,
+                              &clip.width, &clip.height, nullptr);
+    if (!clip.Contains(ToPoint(aPoint))) {
+      return nullptr;
+    }
+  }
+
+  return nsSVGDisplayContainerFrame::GetFrameForPoint(aPoint);
+}
+
+//----------------------------------------------------------------------
+// nsISVGSVGFrame methods:
+
+void
+nsSVGInnerSVGFrame::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 nsSVGInnerSVGFrame");
+}
+
+//----------------------------------------------------------------------
+// nsSVGContainerFrame methods:
+
+gfxMatrix
+nsSVGInnerSVGFrame::GetCanvasTM()
+{
+  if (!mCanvasTM) {
+    NS_ASSERTION(GetParent(), "null parent");
+
+    nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
+    SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
+
+    gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
+
+    mCanvasTM = new gfxMatrix(tm);
+  }
+  return *mCanvasTM;
+}
+
+bool
+nsSVGInnerSVGFrame::HasChildrenOnlyTransform(gfx::Matrix *aTransform) const
+{
+  SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
+
+  if (content->HasViewBoxOrSyntheticViewBox()) {
+    // XXX Maybe return false if the transform is the identity transform?
+    if (aTransform) {
+      *aTransform = content->GetViewBoxTransform();
+    }
+    return true;
+  }
+  return false;
+}