Split out recents logic from UiFactory

This CL splits out RecentsView specific logic from UiFactory and
overrides it in the Go IconRecents version, stubbing out much of the
functionality.

Bug: 114136250
Test: Manual test NexusLauncher, Launcher3GoQuickstep
Test: Build Launcher3GoIconRecents
Change-Id: I043f7f2b2581831f1a74a80110e9c4c25231c046

1 files changed, 113 insertions, 0 deletions

diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/RecentsUiFactory.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/RecentsUiFactory.java
new file mode 100644
index 000000000..f18f43c4c
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/RecentsUiFactory.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2019 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.uioverrides;
+
+import static android.view.View.VISIBLE;
+
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
+import static com.android.launcher3.LauncherState.NORMAL;
+import static com.android.launcher3.LauncherState.OVERVIEW;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
+import com.android.launcher3.LauncherStateManager.StateHandler;
+import com.android.launcher3.anim.AnimatorPlaybackController;
+import com.android.launcher3.util.TouchController;
+import com.android.quickstep.views.RecentsView;
+
+/**
+ * Provides recents-related {@link UiFactory} logic and classes.
+ */
+public final class RecentsUiFactory {
+
+    // Scale recents takes before animating in
+    private static final float RECENTS_PREPARE_SCALE = 1.33f;
+
+    private RecentsUiFactory() {}
+
+    /**
+     * Creates and returns a touch controller for swiping recents tasks.
+     *
+     * @param launcher the launcher activity
+     * @return the touch controller for recents tasks
+     */
+    public static TouchController createTaskSwipeController(Launcher launcher) {
+        return new LauncherTaskViewController(launcher);
+    }
+
+    /**
+     * Creates and returns the controller responsible for recents view state transitions.
+     *
+     * @param launcher the launcher activity
+     * @return state handler for recents
+     */
+    public static StateHandler createRecentsViewStateController(Launcher launcher) {
+        return new RecentsViewStateController(launcher);
+    }
+
+    /**
+     * Prepare the recents view to animate in.
+     *
+     * @param launcher the launcher activity
+     */
+    public static void prepareToShowRecents(Launcher launcher) {
+        RecentsView overview = launcher.getOverviewPanel();
+        if (overview.getVisibility() != VISIBLE || overview.getContentAlpha() == 0) {
+            SCALE_PROPERTY.set(overview, RECENTS_PREPARE_SCALE);
+        }
+    }
+
+    /**
+     * Clean-up logic that occurs when recents is no longer in use/visible.
+     *
+     * @param launcher the launcher activity
+     */
+    public static void resetRecents(Launcher launcher) {
+        RecentsView recents = launcher.getOverviewPanel();
+        recents.reset();
+    }
+
+    /**
+     * Recents logic that triggers when launcher state changes or launcher activity stops/resumes.
+     *
+     * @param launcher the launcher activity
+     */
+    public static void onLauncherStateOrResumeChanged(Launcher launcher) {
+        LauncherState state = launcher.getStateManager().getState();
+        if (state == NORMAL) {
+            launcher.<RecentsView>getOverviewPanel().setSwipeDownShouldLaunchApp(false);
+        }
+    }
+
+    private static final class LauncherTaskViewController extends
+            TaskViewTouchController<Launcher> {
+
+        LauncherTaskViewController(Launcher activity) {
+            super(activity);
+        }
+
+        @Override
+        protected boolean isRecentsInteractive() {
+            return mActivity.isInState(OVERVIEW);
+        }
+
+        @Override
+        protected void onUserControlledAnimationCreated(AnimatorPlaybackController animController) {
+            mActivity.getStateManager().setCurrentUserControlledAnimation(animController);
+        }
+    }
+}