[SVGDom] Initial SVGLength support

Mostly plumb new length types, but also introduce a stateful parser,
rect shape and named color support.

R=reed@google.com,robertphillips@google.com,stephana@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2202053002

Review-Url: https://codereview.chromium.org/2202053002

1 files changed, 44 insertions, 0 deletions

diff --git a/experimental/svg/model/SkSVGSVG.cpp b/experimental/svg/model/SkSVGSVG.cpp
index aeccc7082b..42bd280a5e 100644
--- a/experimental/svg/model/SkSVGSVG.cpp
+++ b/experimental/svg/model/SkSVGSVG.cpp
@@ -6,5 +6,49 @@
  */
 
 #include "SkSVGSVG.h"
+#include "SkSVGValue.h"
 
 SkSVGSVG::SkSVGSVG() : INHERITED(SkSVGTag::kSvg) { }
+
+void SkSVGSVG::setX(const SkSVGLength& x) {
+    fX = x;
+}
+
+void SkSVGSVG::setY(const SkSVGLength& y) {
+    fY = y;
+}
+
+void SkSVGSVG::setWidth(const SkSVGLength& w) {
+    fWidth = w;
+}
+
+void SkSVGSVG::setHeight(const SkSVGLength& h) {
+    fHeight = h;
+}
+
+void SkSVGSVG::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
+    switch (attr) {
+    case SkSVGAttribute::kX:
+        if (const auto* x = v.as<SkSVGLengthValue>()) {
+            this->setX(*x);
+        }
+        break;
+    case SkSVGAttribute::kY:
+        if (const auto* y = v.as<SkSVGLengthValue>()) {
+            this->setY(*y);
+        }
+        break;
+    case SkSVGAttribute::kWidth:
+        if (const auto* w = v.as<SkSVGLengthValue>()) {
+            this->setWidth(*w);
+        }
+        break;
+    case SkSVGAttribute::kHeight:
+        if (const auto* h = v.as<SkSVGLengthValue>()) {
+            this->setHeight(*h);
+        }
+        break;
+    default:
+        this->INHERITED::onSetAttribute(attr, v);
+    }
+}