1 files changed, 95 insertions, 0 deletions
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/FastOverviewState.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/FastOverviewState.java
new file mode 100644
index 000000000..1d65a54e7
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/FastOverviewState.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2018 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 android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Rect;
+
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.R;
+import com.android.quickstep.QuickScrubController;
+import com.android.quickstep.views.RecentsView;
+
+/**
+ * Extension of overview state used for QuickScrub
+ */
+public class FastOverviewState extends OverviewState {
+
+    private static final float MAX_PREVIEW_SCALE_UP = 1.3f;
+    /**
+     * Vertical transition of the task previews relative to the full container.
+     */
+    public static final float OVERVIEW_TRANSLATION_FACTOR = 0.4f;
+    public static final float OVERVIEW_CENTERED_TRANSLATION_FACTOR = 0.5f;
+
+    private static final int STATE_FLAGS = FLAG_DISABLE_RESTORE | FLAG_DISABLE_INTERACTION
+            | FLAG_OVERVIEW_UI | FLAG_HIDE_BACK_BUTTON | FLAG_DISABLE_ACCESSIBILITY;
+
+    public FastOverviewState(int id) {
+        super(id, QuickScrubController.QUICK_SCRUB_FROM_HOME_START_DURATION, STATE_FLAGS);
+    }
+
+    @Override
+    public void onStateTransitionEnd(Launcher launcher) {
+        super.onStateTransitionEnd(launcher);
+        RecentsView recentsView = launcher.getOverviewPanel();
+        recentsView.getQuickScrubController().onFinishedTransitionToQuickScrub();
+    }
+
+    @Override
+    public int getVisibleElements(Launcher launcher) {
+        return NONE;
+    }
+
+    @Override
+    public float[] getOverviewScaleAndTranslationYFactor(Launcher launcher) {
+        RecentsView recentsView = launcher.getOverviewPanel();
+        recentsView.getTaskSize(sTempRect);
+
+        boolean isQuickSwitch = recentsView.getQuickScrubController().isQuickSwitch();
+        float translationYFactor = isQuickSwitch
+                ? OVERVIEW_CENTERED_TRANSLATION_FACTOR
+                : OVERVIEW_TRANSLATION_FACTOR;
+        return new float[] {getOverviewScale(launcher.getDeviceProfile(), sTempRect, launcher,
+                isQuickSwitch), translationYFactor};
+    }
+
+    public static float getOverviewScale(DeviceProfile dp, Rect taskRect, Context context,
+            boolean isQuickSwitch) {
+        if (dp.isVerticalBarLayout() && !isQuickSwitch) {
+            return 1f;
+        }
+
+        Resources res = context.getResources();
+        float usedHeight = taskRect.height() + res.getDimension(R.dimen.task_thumbnail_top_margin);
+        float usedWidth = taskRect.width() + 2 * (res.getDimension(R.dimen.recents_page_spacing)
+                + res.getDimension(R.dimen.quickscrub_adjacent_visible_width));
+        if (isQuickSwitch) {
+            usedWidth = taskRect.width();
+            return Math.max(dp.availableHeightPx / usedHeight, dp.availableWidthPx / usedWidth);
+        }
+        return Math.min(Math.min(dp.availableHeightPx / usedHeight,
+                dp.availableWidthPx / usedWidth), MAX_PREVIEW_SCALE_UP);
+    }
+
+    @Override
+    public void onStateDisabled(Launcher launcher) {
+        super.onStateDisabled(launcher);
+        launcher.<RecentsView>getOverviewPanel().getQuickScrubController().cancelActiveQuickscrub();
+    }
+}