add sizeThatFits in scroller node

doric-Qt/doric/shader/DoricScrollerNode.cpp

@@ -13,8 +13,6 @@ QQuickItem *DoricScrollerNode::build() {
   QQuickItem *item = qobject_cast<QQuickItem *>(component.create());
   this->createLayouts(item);
 
-  getLayouts()->setLayoutType(DoricLayoutType::DoricStack);
-
   item->setProperty("wrapper", QString::number((qint64)this));
   return item;
 }
@@ -109,3 +107,13 @@ void DoricScrollerNode::blendSubNode(QJsonValue subProperties) {
     mChildNode->blend(subProperties["props"]);
   }
 }
+
+QSizeF DoricScrollerNode::sizeThatFits(QSizeF size) {
+  DoricLayouts *layout = (DoricLayouts *)mChildNode->getNodeView()
+                             ->property("doricLayout")
+                             .toULongLong();
+  layout->apply(size);
+
+  return QSizeF(qMin(size.width(), layout->getMeasuredWidth()),
+                qMin(size.height(), layout->getMeasuredHeight()));
+}

doric-Qt/doric/shader/DoricScrollerNode.h

@@ -23,6 +23,8 @@ public:
   virtual void afterBlended(QJsonValue jsValue) override;
 
   virtual void requestLayout() override;
+
+  QSizeF sizeThatFits(QSizeF size);
 };
 
 #endif // DORICSCROLLERNODE_H

doric-Qt/doric/utils/DoricLayouts.cpp

@@ -1,4 +1,5 @@
 #include "DoricLayouts.h"
+#include "shader/DoricScrollerNode.h"
 
 DoricLayouts::DoricLayouts(QObject *parent) : QObject(parent) {
   this->widthSpec = DoricLayoutSpec::DoricLayoutJust;
@@ -222,15 +223,27 @@ void DoricLayouts::measureContent(QSizeF targetSize) {
 }
 
 void DoricLayouts::measureUndefinedContent(QSizeF targetSize) {
+  // begin size that fits
   qreal width = this->view->width();
   qreal height = this->view->height();
 
+  if (tag == "Scroller") {
+    QObject *object =
+        (QObject *)(this->view->property("wrapper").toULongLong());
+    DoricScrollerNode *viewNode = dynamic_cast<DoricScrollerNode *>(object);
+    QSizeF measuredSize = viewNode->sizeThatFits(targetSize);
+    width = measuredSize.width();
+    height = measuredSize.height();
+  } else {
     if (width > targetSize.width()) {
       width = targetSize.width();
     }
     if (height > targetSize.height()) {
       height = targetSize.height();
     }
+  }
+  // end size that fits
+
   if (this->widthSpec == DoricLayoutSpec::DoricLayoutFit) {
     setMeasuredWidth(width + this->paddingLeft + this->paddingRight);
   }