1 files changed, 154 insertions, 0 deletions
diff --git a/layout/svg/nsSVGPatternFrame.h b/layout/svg/nsSVGPatternFrame.h
new file mode 100644
index 000000000..7c3cd1ad1
--- /dev/null
+++ b/layout/svg/nsSVGPatternFrame.h
@@ -0,0 +1,154 @@
+/* -*- 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_SVGPATTERNFRAME_H__
+#define __NS_SVGPATTERNFRAME_H__
+
+#include "mozilla/Attributes.h"
+#include "gfxMatrix.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "nsAutoPtr.h"
+#include "nsSVGPaintServerFrame.h"
+
+class nsIFrame;
+class nsSVGLength2;
+class nsSVGPathGeometryFrame;
+class nsSVGViewBox;
+
+namespace mozilla {
+class SVGAnimatedPreserveAspectRatio;
+class nsSVGAnimatedTransformList;
+} // namespace mozilla
+
+/**
+ * Patterns can refer to other patterns. We create an nsSVGPaintingProperty
+ * with property type nsGkAtoms::href to track the referenced pattern.
+ */
+class nsSVGPatternFrame : public nsSVGPaintServerFrame
+{
+  typedef mozilla::gfx::SourceSurface SourceSurface;
+
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  friend nsIFrame* NS_NewSVGPatternFrame(nsIPresShell* aPresShell,
+                                         nsStyleContext* aContext);
+
+  explicit nsSVGPatternFrame(nsStyleContext* aContext);
+
+  // nsSVGPaintServerFrame methods:
+  virtual already_AddRefed<gfxPattern>
+    GetPaintServerPattern(nsIFrame *aSource,
+                          const DrawTarget* aDrawTarget,
+                          const gfxMatrix& aContextMatrix,
+                          nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
+                          float aOpacity,
+                          const gfxRect *aOverrideBounds) override;
+
+public:
+  typedef mozilla::SVGAnimatedPreserveAspectRatio SVGAnimatedPreserveAspectRatio;
+
+  // nsSVGContainerFrame methods:
+  virtual gfxMatrix GetCanvasTM() override;
+
+  // nsIFrame interface:
+  virtual nsresult AttributeChanged(int32_t         aNameSpaceID,
+                                    nsIAtom*        aAttribute,
+                                    int32_t         aModType) override;
+
+#ifdef DEBUG
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+#endif
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::svgPatternFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override
+  {
+    return MakeFrameName(NS_LITERAL_STRING("SVGPattern"), aResult);
+  }
+#endif // DEBUG
+
+protected:
+  // Internal methods for handling referenced patterns
+  class AutoPatternReferencer;
+  nsSVGPatternFrame* GetReferencedPattern();
+  nsSVGPatternFrame* GetReferencedPatternIfNotInUse();
+
+  // Accessors to lookup pattern attributes
+  uint16_t GetEnumValue(uint32_t aIndex, nsIContent *aDefault);
+  uint16_t GetEnumValue(uint32_t aIndex)
+  {
+    return GetEnumValue(aIndex, mContent);
+  }
+  mozilla::nsSVGAnimatedTransformList* GetPatternTransformList(
+      nsIContent* aDefault);
+  gfxMatrix GetPatternTransform();
+  const nsSVGViewBox &GetViewBox(nsIContent *aDefault);
+  const nsSVGViewBox &GetViewBox() { return GetViewBox(mContent); }
+  const SVGAnimatedPreserveAspectRatio &GetPreserveAspectRatio(
+      nsIContent *aDefault);
+  const SVGAnimatedPreserveAspectRatio &GetPreserveAspectRatio()
+  {
+    return GetPreserveAspectRatio(mContent);
+  }
+  const nsSVGLength2 *GetLengthValue(uint32_t aIndex, nsIContent *aDefault);
+  const nsSVGLength2 *GetLengthValue(uint32_t aIndex)
+  {
+    return GetLengthValue(aIndex, mContent);
+  }
+
+  already_AddRefed<SourceSurface>
+  PaintPattern(const DrawTarget* aDrawTarget,
+               Matrix *patternMatrix,
+               const Matrix &aContextMatrix,
+               nsIFrame *aSource,
+               nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
+               float aGraphicOpacity,
+               const gfxRect *aOverrideBounds);
+
+  /**
+   * A <pattern> element may reference another <pattern> element using
+   * xlink:href and, if it doesn't have any child content of its own, then it
+   * will "inherit" the children of the referenced pattern (which may itself be
+   * inheriting its children if it references another <pattern>).  This
+   * function returns this nsSVGPatternFrame or the first pattern along the
+   * reference chain (if there is one) to have children.
+   */
+  nsSVGPatternFrame* GetPatternWithChildren();
+
+  gfxRect    GetPatternRect(uint16_t aPatternUnits,
+                            const gfxRect &bbox,
+                            const Matrix &callerCTM,
+                            nsIFrame *aTarget);
+  gfxMatrix  ConstructCTM(const nsSVGViewBox& aViewBox,
+                          uint16_t aPatternContentUnits,
+                          uint16_t aPatternUnits,
+                          const gfxRect &callerBBox,
+                          const Matrix &callerCTM,
+                          nsIFrame *aTarget);
+
+private:
+  // this is a *temporary* reference to the frame of the element currently
+  // referencing our pattern.  This must be temporary because different
+  // referencing frames will all reference this one frame
+  nsSVGPathGeometryFrame           *mSource;
+  nsAutoPtr<gfxMatrix>              mCTM;
+
+protected:
+  // This flag is used to detect loops in xlink:href processing
+  bool                              mLoopFlag;
+  bool                              mNoHRefURI;
+};
+
+#endif