Merge "Adding A Minimize Button" into tm-qpr-dev

libs/WindowManager/Shell/res/drawable/decor_minimize_button_dark.xml

@@ -0,0 +1,24 @@
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24"
+        android:viewportHeight="24"
+        android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white" android:pathData="M6,21V19H18V21Z"/>
+</vector>

libs/WindowManager/Shell/res/layout/caption_window_decoration.xml

@@ -21,6 +21,17 @@
     android:layout_height="wrap_content"
     android:gravity="end"
     android:background="@drawable/decor_caption_title">
+    <Button
+        android:id="@+id/minimize_window"
+        android:visibility="gone"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
+        android:layout_margin="5dp"
+        android:padding="4dp"
+        android:layout_gravity="top|end"
+        android:contentDescription="@string/maximize_button_text"
+        android:background="@drawable/decor_minimize_button_dark"
+        android:duplicateParentState="true"/>
     <Button
         android:id="@+id/maximize_window"
         android:layout_width="32dp"
@@ -42,4 +53,3 @@
         android:background="@drawable/decor_close_button_dark"
         android:duplicateParentState="true"/>
 </com.android.wm.shell.windowdecor.WindowDecorLinearLayout>
-

libs/WindowManager/Shell/res/values/strings.xml

@@ -192,6 +192,8 @@
     <!-- Freeform window caption strings -->
     <!-- Accessibility text for the maximize window button [CHAR LIMIT=NONE] -->
     <string name="maximize_button_text">Maximize</string>
+     <!-- Accessibility text for the minimize window button [CHAR LIMIT=NONE] -->
+     <string name="minimize_button_text">Minimize</string>
     <!-- Accessibility text for the close window button [CHAR LIMIT=NONE] -->
     <string name="close_button_text">Close</string>
 </resources>

libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionHandler.java

@@ -91,6 +91,12 @@ public class FreeformTaskTransitionHandler
         mPendingTransitionTokens.add(token);
     }
 
+    @Override
+    public void startMinimizedModeTransition(WindowContainerTransaction wct) {
+        final int type = WindowManager.TRANSIT_TO_BACK;
+        mPendingTransitionTokens.add(mTransitions.startTransition(type, wct, this));
+    }
+
     @Override
     public boolean startAnimation(@NonNull IBinder transition, @NonNull TransitionInfo info,
             @NonNull SurfaceControl.Transaction startT,
@@ -121,6 +127,8 @@ public class FreeformTaskTransitionHandler
                             transition, info.getType(), change, startT, finishT);
                     break;
                 case WindowManager.TRANSIT_TO_BACK:
+                    transitionHandled |= startMinimizeTransition(transition);
+                    break;
                 case WindowManager.TRANSIT_TO_FRONT:
                     break;
             }
@@ -169,6 +177,13 @@ public class FreeformTaskTransitionHandler
         return false;
     }
 
+    private boolean startMinimizeTransition(IBinder transition) {
+        if (!mPendingTransitionTokens.contains(transition)) {
+            return false;
+        }
+        return true;
+    }
+
     private boolean startChangeTransition(
             IBinder transition,
             int type,
@@ -243,4 +258,5 @@ public class FreeformTaskTransitionHandler
                 return null;
         }
     }
+
 }

libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionStarter.java

@@ -29,6 +29,15 @@ public interface FreeformTaskTransitionStarter {
      *
      * @param targetWindowingMode the target windowing mode
      * @param wct the {@link WindowContainerTransaction} that changes the windowing mode
+     *
      */
     void startWindowingModeTransition(int targetWindowingMode, WindowContainerTransaction wct);
-}
+
+    /**
+     * Starts window minimization transition
+     *
+     * @param wct the {@link WindowContainerTransaction} that changes the windowing mode
+     *
+     */
+    void startMinimizedModeTransition(WindowContainerTransaction wct);
+}

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecorViewModel.java

@@ -51,7 +51,6 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel<Caption
     private final Choreographer mMainChoreographer;
     private final DisplayController mDisplayController;
     private final SyncTransactionQueue mSyncQueue;
-
     private FreeformTaskTransitionStarter mTransitionStarter;
 
     public CaptionWindowDecorViewModel(
@@ -168,6 +167,14 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel<Caption
                 } else {
                     mSyncQueue.queue(wct);
                 }
+            } else if (id == R.id.minimize_window) {
+                WindowContainerTransaction wct = new WindowContainerTransaction();
+                wct.reorder(mTaskToken, false);
+                if (Transitions.ENABLE_SHELL_TRANSITIONS) {
+                    mTransitionStarter.startMinimizedModeTransition(wct);
+                } else {
+                    mSyncQueue.queue(wct);
+                }
             }
         }
 

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java

@@ -161,12 +161,13 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
      */
     private void setupRootView() {
         View caption = mResult.mRootView.findViewById(R.id.caption);
-
         caption.setOnTouchListener(mOnCaptionTouchListener);
         View maximize = caption.findViewById(R.id.maximize_window);
         maximize.setOnClickListener(mOnCaptionButtonClickListener);
         View close = caption.findViewById(R.id.close_window);
         close.setOnClickListener(mOnCaptionButtonClickListener);
+        View minimize = caption.findViewById(R.id.minimize_window);
+        minimize.setOnClickListener(mOnCaptionButtonClickListener);
     }
 
     void setCaptionColor(int captionColor) {