1 files changed, 97 insertions, 0 deletions
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
new file mode 100644
index 0000000000..4b4ee4423c
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+package com.android.launcher3.taskbar;
+
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_EXPANDED;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED;
+
+import android.animation.ObjectAnimator;
+import android.view.animation.Interpolator;
+import android.view.animation.PathInterpolator;
+
+import com.android.quickstep.AnimatedFloat;
+import com.android.quickstep.SystemUiProxy;
+
+/**
+ * Handles properties/data collection, and passes the results to {@link TaskbarScrimView} to render.
+ */
+public class TaskbarScrimViewController {
+
+    private static final float SCRIM_ALPHA = 0.6f;
+
+    private static final Interpolator SCRIM_ALPHA_IN = new PathInterpolator(0.4f, 0f, 1f, 1f);
+    private static final Interpolator SCRIM_ALPHA_OUT = new PathInterpolator(0f, 0f, 0.8f, 1f);
+
+    private final TaskbarActivityContext mActivity;
+    private final TaskbarScrimView mScrimView;
+
+    // Alpha property for the scrim.
+    private final AnimatedFloat mScrimAlpha = new AnimatedFloat(this::updateScrimAlpha);
+
+    // Initialized in init.
+    private TaskbarControllers mControllers;
+
+    public TaskbarScrimViewController(TaskbarActivityContext activity, TaskbarScrimView scrimView) {
+        mActivity = activity;
+        mScrimView = scrimView;
+        mScrimView.setCornerSizes(mActivity.getLeftCornerRadius(),
+                mActivity.getRightCornerRadius());
+        mScrimView.setBackgroundHeight(mActivity.getDeviceProfile().taskbarSize);
+    }
+
+    /**
+     * Initializes the controller
+     */
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+    }
+
+    /**
+     * Updates the scrim state based on the flags.
+     */
+    public void updateStateForSysuiFlags(int stateFlags, boolean skipAnim) {
+        final boolean bubblesExpanded = (stateFlags & SYSUI_STATE_BUBBLES_EXPANDED) != 0;
+        final boolean manageMenuExpanded =
+                (stateFlags & SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED) != 0;
+        final boolean showScrim = !mControllers.navbarButtonsViewController.isImeVisible()
+                && bubblesExpanded && mControllers.taskbarStashController.isInAppAndNotStashed();
+        final float scrimAlpha = manageMenuExpanded
+                // When manage menu shows there's the first scrim and second scrim so figure out
+                // what the total transparency would be.
+                ? (SCRIM_ALPHA + (SCRIM_ALPHA * (1 - SCRIM_ALPHA)))
+                : showScrim ? SCRIM_ALPHA : 0;
+        showScrim(showScrim, scrimAlpha, skipAnim);
+    }
+
+    private void showScrim(boolean showScrim, float alpha, boolean skipAnim) {
+        mScrimView.setOnClickListener(showScrim ? (view) -> onClick() : null);
+        mScrimView.setClickable(showScrim);
+        ObjectAnimator anim = mScrimAlpha.animateToValue(showScrim ? alpha : 0);
+        anim.setInterpolator(showScrim ? SCRIM_ALPHA_IN : SCRIM_ALPHA_OUT);
+        anim.start();
+        if (skipAnim) {
+            anim.end();
+        }
+    }
+
+    private void updateScrimAlpha() {
+        mScrimView.setScrimAlpha(mScrimAlpha.value);
+    }
+
+    private void onClick() {
+        SystemUiProxy.INSTANCE.get(mActivity).onBackPressed();
+    }
+}