Initial SVG model

experimental/svg/model/SkSVGNode.cpp

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkCanvas.h"
+#include "SkMatrix.h"
+#include "SkSVGNode.h"
+#include "SkSVGRenderContext.h"
+#include "SkSVGValue.h"
+#include "SkTLazy.h"
+
+SkSVGNode::SkSVGNode(SkSVGTag t) : fTag(t) { }
+
+SkSVGNode::~SkSVGNode() { }
+
+void SkSVGNode::render(SkCanvas* canvas) const {
+    this->render(canvas, SkSVGRenderContext());
+}
+
+void SkSVGNode::render(SkCanvas* canvas, const SkSVGRenderContext& ctx) const {
+    SkTCopyOnFirstWrite<SkSVGRenderContext> localContext(ctx);
+    fPresentationAttributes.applyTo(localContext);
+
+    SkAutoCanvasRestore acr(canvas, false);
+    const SkMatrix& m = this->onLocalMatrix();
+    if (!m.isIdentity()) {
+        canvas->save();
+        canvas->concat(m);
+    }
+
+    this->onRender(canvas, *localContext);
+}
+
+void SkSVGNode::setAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
+    this->onSetAttribute(attr, v);
+}
+
+void SkSVGNode::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
+    switch (attr) {
+    case SkSVGAttribute::fill:
+        if (const SkSVGColorValue* color = v.as<SkSVGColorValue>()) {
+            fPresentationAttributes.setFill(*color);
+        }
+        break;
+    case SkSVGAttribute::stroke:
+        if (const SkSVGColorValue* color = v.as<SkSVGColorValue>()) {
+            fPresentationAttributes.setStroke(*color);
+        }
+        break;
+    default:
+        break;
+    }
+}
+
+const SkMatrix& SkSVGNode::onLocalMatrix() const {
+    return SkMatrix::I();
+}