Prevent layout animation on Artboards just added to ArtboardHosts (#11548) f16f751405

* Prevent layout animation on List items just added to List

* Rebaseline silvers

Co-authored-by: Philip Chung <philterdesign@gmail.com>

Author: bodymovin

.rive_head

@@ -1 +1 @@
-e86db167edbb949225333e31aa06915a29dfc67e
+f16f751405686bab7f51b16131af210b1bf1cee8

include/rive/artboard.hpp

@@ -138,6 +138,7 @@ class Artboard : public ArtboardBase,
     void updateDataBinds(bool applyTargetToSource = true) override;
     void host(ArtboardHost* artboardHost);
     ArtboardHost* host() const;
+    void addedToHost() { m_justAddedToHost = true; }
 
     // Implemented for ShapePaintContainer.
     const Mat2D& shapeWorldTransform() const override

include/rive/layout_component.hpp

@@ -118,6 +118,7 @@ class LayoutComponent : public LayoutComponentBase,
     ShapePaintPath m_localPath;
     ShapePaintPath m_worldPath;
     DrawableProxy m_proxy;
+    bool m_justAddedToHost = false;
 
     Artboard* getArtboard() override { return artboard(); }
     LayoutAnimationData* currentAnimationData();

src/artboard.cpp

@@ -869,6 +869,7 @@ void Artboard::cloneObjectDataBinds(const Core* object,
 }
 void Artboard::host(ArtboardHost* artboardHost)
 {
+    addedToHost();
     m_host = artboardHost;
 #ifdef WITH_RIVE_LAYOUT
     if (!sharesLayoutWithHost())

src/layout_component.cpp

@@ -1027,6 +1027,30 @@ void LayoutComponent::updateLayoutBounds(bool animate)
     Layout newLayout = layoutFromYoga(yogaLayout);
     m_layoutPadding = layoutPaddingFromYoga(yogaLayout);
 
+    if (m_justAddedToHost)
+    {
+        m_justAddedToHost = false;
+        // In cases were we have a host (ie, Component List, etc), we
+        // don't want to animate the x/y/width/height because the initial
+        // x/y/width/height will have been 0,0,0,0 within the parent host.
+        //
+        // Instead, we want to the position/size to start at whatever this
+        // layout's computed position is within its host.
+        //
+        // We'll keep this as an entirely seperate code path because
+        // this may be useful in adding support for animate in/out of
+        // items in an ArtboardHost.
+        m_layout = newLayout;
+        auto animationData = currentAnimationData();
+        animationData->from = newLayout;
+        animationData->to = newLayout;
+        animationData->elapsedSeconds = 0.0f;
+        propagateSize();
+        markWorldTransformDirty();
+        m_forceUpdateLayoutBounds = false;
+        return;
+    }
+
     if (animate && animates())
     {
         auto animationData = currentAnimationData();