[SVGDom] Add 'visibility' support

https://www.w3.org/TR/SVG/painting.html#VisibilityProperty

Change-Id: I8b872af26150d93cf39cf8eeba23c91e1decace3
Reviewed-on: https://skia-review.googlesource.com/58863
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 13 insertions, 1 deletions

diff --git a/experimental/svg/model/SkSVGNode.cpp b/experimental/svg/model/SkSVGNode.cpp
index dfd25bafbb..ddde838f8e 100644
--- a/experimental/svg/model/SkSVGNode.cpp
+++ b/experimental/svg/model/SkSVGNode.cpp
@@ -50,7 +50,10 @@ SkPath SkSVGNode::asPath(const SkSVGRenderContext& ctx) const {
 bool SkSVGNode::onPrepareToRender(SkSVGRenderContext* ctx) const {
     ctx->applyPresentationAttributes(fPresentationAttributes,
                                      this->hasChildren() ? 0 : SkSVGRenderContext::kLeaf);
-    return true;
+
+    // visibility:hidden disables rendering
+    const auto visibility = ctx->presentationContext().fInherited.fVisibility.get()->type();
+    return visibility != SkSVGVisibility::Type::kHidden;
 }
 
 void SkSVGNode::setAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
@@ -96,6 +99,10 @@ void SkSVGNode::setStrokeWidth(const SkSVGLength& strokeWidth) {
     fPresentationAttributes.fStrokeWidth.set(strokeWidth);
 }
 
+void SkSVGNode::setVisibility(const SkSVGVisibility& visibility) {
+    fPresentationAttributes.fVisibility.set(visibility);
+}
+
 void SkSVGNode::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
     switch (attr) {
     case SkSVGAttribute::kClipPath:
@@ -158,6 +165,11 @@ void SkSVGNode::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
             this->setStrokeWidth(*strokeWidth);
         }
         break;
+    case SkSVGAttribute::kVisibility:
+        if (const SkSVGVisibilityValue* visibility = v.as<SkSVGVisibilityValue>()) {
+            this->setVisibility(*visibility);
+        }
+        break;
     default:
         SkDebugf("attribute ID <%d> ignored for node <%d>\n", attr, fTag);
         break;