ADD week 5

02-Easy5/E5/sources/androidx/coordinatorlayout/widget/ViewGroupUtils.java

@@ -0,0 +1,56 @@
+package androidx.coordinatorlayout.widget;
+
+import android.graphics.Matrix;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+
+/* loaded from: classes.dex */
+public class ViewGroupUtils {
+    private static final ThreadLocal<Matrix> sMatrix = new ThreadLocal<>();
+    private static final ThreadLocal<RectF> sRectF = new ThreadLocal<>();
+
+    static void offsetDescendantRect(ViewGroup viewGroup, View view, Rect rect) {
+        ThreadLocal<Matrix> threadLocal = sMatrix;
+        Matrix matrix = threadLocal.get();
+        if (matrix == null) {
+            matrix = new Matrix();
+            threadLocal.set(matrix);
+        } else {
+            matrix.reset();
+        }
+        offsetDescendantMatrix(viewGroup, view, matrix);
+        ThreadLocal<RectF> threadLocal2 = sRectF;
+        RectF rectF = threadLocal2.get();
+        if (rectF == null) {
+            rectF = new RectF();
+            threadLocal2.set(rectF);
+        }
+        rectF.set(rect);
+        matrix.mapRect(rectF);
+        rect.set((int) (rectF.left + 0.5f), (int) (rectF.top + 0.5f), (int) (rectF.right + 0.5f), (int) (rectF.bottom + 0.5f));
+    }
+
+    public static void getDescendantRect(ViewGroup viewGroup, View view, Rect rect) {
+        rect.set(0, 0, view.getWidth(), view.getHeight());
+        offsetDescendantRect(viewGroup, view, rect);
+    }
+
+    private static void offsetDescendantMatrix(ViewParent viewParent, View view, Matrix matrix) {
+        Object parent = view.getParent();
+        if ((parent instanceof View) && parent != viewParent) {
+            offsetDescendantMatrix(viewParent, (View) parent, matrix);
+            matrix.preTranslate(-r0.getScrollX(), -r0.getScrollY());
+        }
+        matrix.preTranslate(view.getLeft(), view.getTop());
+        if (view.getMatrix().isIdentity()) {
+            return;
+        }
+        matrix.preConcat(view.getMatrix());
+    }
+
+    private ViewGroupUtils() {
+    }
+}