content: /*
   * 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.states;
  
  import static android.view.View.VISIBLE;
  
  import static com.android.launcher3.LauncherAnimUtils.OVERVIEW_TRANSITION_MS;
  import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
  import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_FADE;
  import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_SCALE;
  import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_TRANSLATE_X;
  import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_WORKSPACE_FADE;
  import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_WORKSPACE_SCALE;
  import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_WORKSPACE_TRANSLATE;
  import static com.android.launcher3.anim.Interpolators.ACCEL;
  import static com.android.launcher3.anim.Interpolators.DEACCEL_2;
  import static com.android.launcher3.anim.Interpolators.OVERSHOOT_1_2;
  import static com.android.launcher3.anim.Interpolators.OVERSHOOT_1_7;
  import static com.android.launcher3.states.RotationHelper.REQUEST_ROTATE;
  
  import android.content.Context;
  import android.view.View;
  
  import com.android.launcher3.DeviceProfile;
  import com.android.launcher3.Launcher;
  import com.android.launcher3.LauncherState;
  import com.android.launcher3.R;
  import com.android.launcher3.anim.AnimatorSetBuilder;
  import com.android.launcher3.userevent.nano.LauncherLogProto;
  import com.android.quickstep.SysUINavigationMode;
  import com.android.quickstep.views.IconRecentsView;
  
  /**
   * Definition for overview state
   */
  public class OverviewState extends LauncherState {
  
      // Scale recents takes before animating in
      private static final float RECENTS_PREPARE_SCALE = 1.33f;
  
      private static final int STATE_FLAGS = FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED
              | FLAG_DISABLE_RESTORE | FLAG_OVERVIEW_UI | FLAG_DISABLE_ACCESSIBILITY;
  
      public OverviewState(int id) {
          this(id, OVERVIEW_TRANSITION_MS, STATE_FLAGS);
      }
  
      protected OverviewState(int id, int transitionDuration, int stateFlags) {
          super(id, LauncherLogProto.ContainerType.TASKSWITCHER, transitionDuration, stateFlags);
      }
  
      @Override
      public ScaleAndTranslation getOverviewScaleAndTranslation(Launcher launcher) {
          return new ScaleAndTranslation(1f, 0f, 0f);
      }
  
      @Override
      public void onStateEnabled(Launcher launcher) {
          IconRecentsView recentsView = launcher.getOverviewPanel();
          recentsView.onBeginTransitionToOverview();
          recentsView.setShowStatusBarForegroundScrim(true);
          // Request orientation be set to unspecified, letting the system decide the best
          // orientation.
          launcher.getRotationHelper().setCurrentStateRequest(REQUEST_ROTATE);
      }
  
      @Override
      public void onStateDisabled(Launcher launcher) {
          IconRecentsView recentsView = launcher.getOverviewPanel();
          recentsView.setShowStatusBarForegroundScrim(false);
      }
  
      @Override
      public PageAlphaProvider getWorkspacePageAlphaProvider(Launcher launcher) {
          return new PageAlphaProvider(DEACCEL_2) {
              @Override
              public float getPageAlpha(int pageIndex) {
                  return 0;
              }
          };
      }
  
      @Override
      public int getVisibleElements(Launcher launcher) {
          return NONE;
      }
  
      @Override
      public float getWorkspaceScrimAlpha(Launcher launcher) {
          return 0.5f;
      }
  
      @Override
      public String getDescription(Launcher launcher) {
          return launcher.getString(R.string.accessibility_desc_recent_apps);
      }
  
      @Override
      public void onBackPressed(Launcher launcher) {
          // TODO: Add logic to go back to task if coming from a currently running task.
          super.onBackPressed(launcher);
      }
  
      public static float getDefaultSwipeHeight(Launcher launcher) {
          return getDefaultSwipeHeight(launcher, launcher.getDeviceProfile());
      }
  
      public static float getDefaultSwipeHeight(Context context, DeviceProfile dp) {
          return dp.allAppsCellHeightPx - dp.allAppsIconTextSizePx;
      }
  
      @Override
      public void prepareForAtomicAnimation(Launcher launcher, LauncherState fromState,
              AnimatorSetBuilder builder) {
          if (fromState == NORMAL && this == OVERVIEW) {
              if (SysUINavigationMode.getMode(launcher) == SysUINavigationMode.Mode.NO_BUTTON) {
                  builder.setInterpolator(ANIM_WORKSPACE_SCALE, ACCEL);
                  builder.setInterpolator(ANIM_WORKSPACE_TRANSLATE, ACCEL);
              } else {
                  builder.setInterpolator(ANIM_WORKSPACE_SCALE, OVERSHOOT_1_2);
              }
              builder.setInterpolator(ANIM_WORKSPACE_FADE, OVERSHOOT_1_2);
              builder.setInterpolator(ANIM_OVERVIEW_SCALE, OVERSHOOT_1_2);
              builder.setInterpolator(ANIM_OVERVIEW_TRANSLATE_X, OVERSHOOT_1_7);
              builder.setInterpolator(ANIM_OVERVIEW_FADE, OVERSHOOT_1_2);
  
              View overview = launcher.getOverviewPanel();
              if (overview.getVisibility() != VISIBLE) {
                  SCALE_PROPERTY.set(overview, RECENTS_PREPARE_SCALE);
              }
          }
      }
  
      public static OverviewState newBackgroundState(int id) {
          return new OverviewState(id);
      }
  
      public static OverviewState newPeekState(int id) {
          return new OverviewState(id);
      }
  
      public static OverviewState newSwitchState(int id) {
          return new OverviewState(id);
      }
  }
  