[SVGDom] ClipPath support

  * clip-path attribute handling
  * clipPath container element
  * asPath() SkSVGNode virtual for capturing subtree geometry

R=robertphillips@google.com,stephana@google.com

Change-Id: I9597534fe3047b631da6309eafac055dff5696e9
Reviewed-on: https://skia-review.googlesource.com/5650
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/experimental/svg/model/SkSVGTypes.h b/experimental/svg/model/SkSVGTypes.h
index d5d2b7146f..42a09b93b5 100644
--- a/experimental/svg/model/SkSVGTypes.h
+++ b/experimental/svg/model/SkSVGTypes.h
@@ -119,6 +119,34 @@ private:
     SkString       fIRI;
 };
 
+class SkSVGClip {
+public:
+    enum class Type {
+        kNone,
+        kInherit,
+        kIRI,
+    };
+
+    SkSVGClip() : fType(Type::kNone) {}
+    explicit SkSVGClip(Type t) : fType(t)           {}
+    explicit SkSVGClip(const SkString& iri) : fType(Type::kIRI), fIRI(iri) {}
+
+    SkSVGClip(const SkSVGClip&)            = default;
+    SkSVGClip& operator=(const SkSVGClip&) = default;
+
+    bool operator==(const SkSVGClip& other) const {
+        return fType == other.fType && fIRI == other.fIRI;
+    }
+    bool operator!=(const SkSVGClip& other) const { return !(*this == other); }
+
+    Type type() const { return fType; }
+    const SkString& iri() const { SkASSERT(fType == Type::kIRI); return fIRI; }
+
+private:
+    Type           fType;
+    SkString       fIRI;
+};
+
 class SkSVGLineCap {
 public:
     enum class Type {