fix recent snapshot bug

Signed-off-by: jincanran <jincanran@huawei.com>
Change-Id: I767e934c72d73d16dcae81b40d0e7662161ce6fe

wmserver/include/window_layout_policy.h

@@ -65,6 +65,7 @@ protected:
     void SetRectForFloating(const sptr<WindowNode>& node);
     Rect ComputeDecoratedWindowRect(const Rect& winRect);
     bool IsVertical() const;
+    bool IsFullScreenRecentWindowExist() const;
     Rect defaultFloatingRect_ = { 0, 0, 0, 0 };
 };
 }

wmserver/src/window_layout_policy.cpp

@@ -57,10 +57,13 @@ void WindowLayoutPolicy::Reorder()
 void WindowLayoutPolicy::LayoutWindowTree()
 {
     limitRect_ = displayRect_;
-    std::vector<sptr<WindowNode>> rootNodes = { aboveAppWindowNode_, appWindowNode_, belowAppWindowNode_ };
-    for (auto& node : rootNodes) { // ensure that the avoid area windows are traversed first
-        LayoutWindowNode(node);
+    LayoutWindowNode(aboveAppWindowNode_); // ensure that the avoid area windows are traversed first
+    if (IsFullScreenRecentWindowExist()) {
+        WLOGFI("recent window on top, early exit layout tree");
+        return;
     }
+    LayoutWindowNode(appWindowNode_);
+    LayoutWindowNode(belowAppWindowNode_);
 }
 
 void WindowLayoutPolicy::LayoutWindowNode(sptr<WindowNode>& node)
@@ -382,6 +385,17 @@ float WindowLayoutPolicy::GetVirtualPixelRatio() const
     return virtualPixelRatio;
 }
 
+bool WindowLayoutPolicy::IsFullScreenRecentWindowExist() const
+{
+    for (auto& childNode : aboveAppWindowNode_->children_) {
+        if (childNode->GetWindowType() == WindowType::WINDOW_TYPE_LAUNCHER_RECENT &&
+            childNode->GetWindowMode() == WindowMode::WINDOW_MODE_FULLSCREEN) {
+            return true;
+        }
+    }
+    return false;
+}
+
 Rect WindowLayoutPolicy::GetDisplayLimitRect() const
 {
     return limitRect_;

wmserver/src/window_layout_policy_cascade.cpp

@@ -86,10 +86,7 @@ void WindowLayoutPolicyCascade::LayoutWindowNode(sptr<WindowNode>& node)
 void WindowLayoutPolicyCascade::LayoutWindowTree()
 {
     InitLimitRects();
-    std::vector<sptr<WindowNode>> rootNodes = { aboveAppWindowNode_, appWindowNode_, belowAppWindowNode_ };
-    for (auto& node : rootNodes) { // ensure that the avoid area windows are traversed first
-        LayoutWindowNode(node);
-    }
+    WindowLayoutPolicy::LayoutWindowTree();
 }
 
 void WindowLayoutPolicyCascade::UpdateWindowNode(sptr<WindowNode>& node, bool isAddWindow)