content: /*
   * Copyright (C) 2017 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_OVERVIEW_TRANSLATE_Y;
  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.logging.LoggerUtils.newContainerTarget;
  import static com.android.launcher3.states.RotationHelper.REQUEST_ROTATE;
  
  import android.graphics.Rect;
  import android.view.View;
  
  import com.android.launcher3.AbstractFloatingView;
  import com.android.launcher3.DeviceProfile;
  import com.android.launcher3.Launcher;
  import com.android.launcher3.LauncherState;
  import com.android.launcher3.R;
  import com.android.launcher3.Workspace;
  import com.android.launcher3.allapps.DiscoveryBounce;
  import com.android.launcher3.anim.AnimatorSetBuilder;
  import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
  import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
  import com.android.quickstep.SysUINavigationMode;
  import com.android.quickstep.util.LayoutUtils;
  import com.android.quickstep.views.RecentsView;
  import com.android.quickstep.views.TaskView;
  
  /**
   * Definition for overview state
   */
  public class OverviewState extends LauncherState {
  
      // Scale recents takes before animating in
      private static final float RECENTS_PREPARE_SCALE = 1.33f;
  
      protected static final Rect sTempRect = new Rect();
  
      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) {
          this(id, ContainerType.TASKSWITCHER, transitionDuration, stateFlags);
      }
  
      protected OverviewState(int id, int logContainer, int transitionDuration, int stateFlags) {
          super(id, logContainer, transitionDuration, stateFlags);
      }
  
      @Override
      public ScaleAndTranslation getWorkspaceScaleAndTranslation(Launcher launcher) {
          RecentsView recentsView = launcher.getOverviewPanel();
          Workspace workspace = launcher.getWorkspace();
          View workspacePage = workspace.getPageAt(workspace.getCurrentPage());
          float workspacePageWidth = workspacePage != null && workspacePage.getWidth() != 0
                  ? workspacePage.getWidth() : launcher.getDeviceProfile().availableWidthPx;
          recentsView.getTaskSize(sTempRect);
          float scale = (float) sTempRect.width() / workspacePageWidth;
          float parallaxFactor = 0.5f;
          return new ScaleAndTranslation(scale, 0, -getDefaultSwipeHeight(launcher) * parallaxFactor);
      }
  
      @Override
      public ScaleAndTranslation getHotseatScaleAndTranslation(Launcher launcher) {
          if ((getVisibleElements(launcher) & HOTSEAT_ICONS) != 0) {
              DeviceProfile dp = launcher.getDeviceProfile();
              if (dp.allAppsIconSizePx >= dp.iconSizePx) {
                  return new ScaleAndTranslation(1, 0, 0);
              } else {
                  float scale = ((float) dp.allAppsIconSizePx) / dp.iconSizePx;
                  // Distance between the screen center (which is the pivotY for hotseat) and the
                  // bottom of the hotseat (which we want to preserve)
                  float distanceFromBottom = dp.heightPx / 2 - dp.hotseatBarBottomPaddingPx;
                  // On scaling, the bottom edge is moved closer to the pivotY. We move the
                  // hotseat back down so that the bottom edge's position is preserved.
                  float translationY = distanceFromBottom * (1 - scale);
                  return new ScaleAndTranslation(scale, 0, translationY);
              }
          }
          return getWorkspaceScaleAndTranslation(launcher);
      }
  
      @Override
      public ScaleAndTranslation getOverviewScaleAndTranslation(Launcher launcher) {
          return new ScaleAndTranslation(1f, 0f, 0f);
      }
  
      @Override
      public void onStateEnabled(Launcher launcher) {
          AbstractFloatingView.closeAllOpenViews(launcher);
      }
  
      @Override
      public void onStateTransitionEnd(Launcher launcher) {
          launcher.getRotationHelper().setCurrentStateRequest(REQUEST_ROTATE);
          DiscoveryBounce.showForOverviewIfNeeded(launcher);
      }
  
      @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) {
          if (launcher.getDeviceProfile().isVerticalBarLayout()) {
              return VERTICAL_SWIPE_INDICATOR | RECENTS_CLEAR_ALL_BUTTON;
          } else {
              boolean hasAllAppsHeaderExtra = launcher.getAppsView() != null
                      && launcher.getAppsView().getFloatingHeaderView().hasVisibleContent();
              return HOTSEAT_SEARCH_BOX | VERTICAL_SWIPE_INDICATOR | RECENTS_CLEAR_ALL_BUTTON |
                      (hasAllAppsHeaderExtra ? ALL_APPS_HEADER_EXTRA : HOTSEAT_ICONS);
          }
      }
  
      @Override
      public float getOverviewScrimAlpha(Launcher launcher) {
          return 0.5f;
      }
  
      @Override
      public float getVerticalProgress(Launcher launcher) {
          if ((getVisibleElements(launcher) & ALL_APPS_HEADER_EXTRA) == 0) {
              // We have no all apps content, so we're still at the fully down progress.
              return super.getVerticalProgress(launcher);
          }
          return getDefaultVerticalProgress(launcher);
      }
  
      public static float getDefaultVerticalProgress(Launcher launcher) {
          return 1 - (getDefaultSwipeHeight(launcher)
                  / launcher.getAllAppsController().getShiftRange());
      }
  
      @Override
      public String getDescription(Launcher launcher) {
          return launcher.getString(R.string.accessibility_desc_recent_apps);
      }
  
      public static float getDefaultSwipeHeight(Launcher launcher) {
          return LayoutUtils.getDefaultSwipeHeight(launcher, launcher.getDeviceProfile());
      }
  
      @Override
      public void onBackPressed(Launcher launcher) {
          TaskView taskView = launcher.<RecentsView>getOverviewPanel().getRunningTaskView();
          if (taskView != null) {
              launcher.getUserEventDispatcher().logActionCommand(Action.Command.BACK,
                      newContainerTarget(ContainerType.OVERVIEW));
              taskView.launchTask(true);
          } else {
              super.onBackPressed(launcher);
          }
      }
  
      @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);
  
                  // Scale up the recents, if it is not coming from the side
                  RecentsView overview = launcher.getOverviewPanel();
                  if (overview.getVisibility() != VISIBLE || overview.getContentAlpha() == 0) {
                      SCALE_PROPERTY.set(overview, RECENTS_PREPARE_SCALE);
                  }
              }
              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_TRANSLATE_Y, OVERSHOOT_1_7);
              builder.setInterpolator(ANIM_OVERVIEW_FADE, OVERSHOOT_1_2);
          }
      }
  
      public static OverviewState newBackgroundState(int id) {
          return new BackgroundAppState(id);
      }
  
      public static OverviewState newPeekState(int id) {
          return new OverviewPeekState(id);
      }
  
      public static OverviewState newSwitchState(int id) {
          return new QuickSwitchState(id);
      }
  }
  