1 files changed, 155 insertions, 0 deletions
diff --git a/layout/svg/nsSVGContainerFrame.h b/layout/svg/nsSVGContainerFrame.h
new file mode 100644
index 000000000..f4a01e155
--- /dev/null
+++ b/layout/svg/nsSVGContainerFrame.h
@@ -0,0 +1,155 @@
+/* -*- 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/. */
+
+#ifndef NS_SVGCONTAINERFRAME_H
+#define NS_SVGCONTAINERFRAME_H
+
+#include "mozilla/Attributes.h"
+#include "nsContainerFrame.h"
+#include "nsFrame.h"
+#include "nsIFrame.h"
+#include "nsISVGChildFrame.h"
+#include "nsQueryFrame.h"
+#include "nsRect.h"
+#include "nsSVGUtils.h"
+
+class gfxContext;
+class nsFrameList;
+class nsIContent;
+class nsIPresShell;
+class nsStyleContext;
+
+struct nsRect;
+
+/**
+ * Base class for SVG container frames. Frame sub-classes that do not
+ * display their contents directly (such as the frames for <marker> or
+ * <pattern>) just inherit this class. Frame sub-classes that do or can
+ * display their contents directly (such as the frames for inner-<svg> or
+ * <g>) inherit our nsDisplayContainerFrame sub-class.
+ *
+ *                               *** WARNING ***
+ *
+ * Do *not* blindly cast to SVG element types in this class's methods (see the
+ * warning comment for nsSVGDisplayContainerFrame below). 
+ */
+class nsSVGContainerFrame : public nsContainerFrame
+{
+  friend nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell,
+                                           nsStyleContext* aContext);
+protected:
+  explicit nsSVGContainerFrame(nsStyleContext* aContext)
+    : nsContainerFrame(aContext)
+  {
+    AddStateBits(NS_FRAME_SVG_LAYOUT);
+  }
+
+public:
+  NS_DECL_QUERYFRAME_TARGET(nsSVGContainerFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+  // Returns the transform to our gfxContext (to device pixels, not CSS px)
+  virtual gfxMatrix GetCanvasTM() {
+    return gfxMatrix();
+  }
+
+  /**
+   * Returns true if the frame's content has a transform that applies only to
+   * its children, and not to the frame itself. For example, an implicit
+   * transform introduced by a 'viewBox' attribute, or an explicit transform
+   * due to a root-<svg> having its currentScale/currentTransform properties
+   * set. If aTransform is non-null, then it will be set to the transform.
+   */
+  virtual bool HasChildrenOnlyTransform(Matrix *aTransform) const {
+    return false;
+  }
+
+  // nsIFrame:
+  virtual void AppendFrames(ChildListID     aListID,
+                            nsFrameList&    aFrameList) override;
+  virtual void InsertFrames(ChildListID     aListID,
+                            nsIFrame*       aPrevFrame,
+                            nsFrameList&    aFrameList) override;
+  virtual void RemoveFrame(ChildListID     aListID,
+                           nsIFrame*       aOldFrame) override;
+
+  virtual bool IsFrameOfType(uint32_t aFlags) const override
+  {
+    return nsContainerFrame::IsFrameOfType(
+            aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
+  }
+
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override {}
+
+  virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override;
+
+protected:
+  /**
+   * Traverses a frame tree, marking any SVGTextFrame frames as dirty
+   * and calling InvalidateRenderingObservers() on it.
+   */
+  static void ReflowSVGNonDisplayText(nsIFrame* aContainer);
+};
+
+/**
+ * Frame class or base-class for SVG containers that can or do display their
+ * contents directly.
+ *
+ *                               *** WARNING ***
+ *
+ * This class's methods can *not* assume that mContent points to an instance of
+ * an SVG element class since this class is inherited by
+ * nsSVGGenericContainerFrame which is used for unrecognized elements in the
+ * SVG namespace. Do *not* blindly cast to SVG element types.
+ */
+class nsSVGDisplayContainerFrame : public nsSVGContainerFrame,
+                                   public nsISVGChildFrame
+{
+protected:
+  explicit nsSVGDisplayContainerFrame(nsStyleContext* aContext)
+    : nsSVGContainerFrame(aContext)
+  {
+     AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
+  }
+
+public:
+  NS_DECL_QUERYFRAME_TARGET(nsSVGDisplayContainerFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+  // nsIFrame:
+  virtual void InsertFrames(ChildListID     aListID,
+                                nsIFrame*       aPrevFrame,
+                                nsFrameList&    aFrameList) override;
+  virtual void RemoveFrame(ChildListID     aListID,
+                               nsIFrame*       aOldFrame) override;
+ virtual void Init(nsIContent*       aContent,
+                   nsContainerFrame* aParent,
+                   nsIFrame*         aPrevInFlow) override;
+
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override;
+
+  virtual bool IsSVGTransformed(Matrix *aOwnTransform = nullptr,
+                                Matrix *aFromParentTransform = nullptr) const override;
+
+  // nsISVGChildFrame interface:
+  virtual DrawResult PaintSVG(gfxContext& aContext,
+                              const gfxMatrix& aTransform,
+                              const nsIntRect *aDirtyRect = nullptr) override;
+  virtual nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
+  virtual nsRect GetCoveredRegion() override;
+  virtual void ReflowSVG() override;
+  virtual void NotifySVGChanged(uint32_t aFlags) override;
+  virtual SVGBBox GetBBoxContribution(const Matrix &aToBBoxUserspace,
+                                      uint32_t aFlags) override;
+  virtual bool IsDisplayContainer() override { return true; }
+};
+
+#endif