content: /*
   * Copyright (C) 2015 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;
  
  import android.appwidget.AppWidgetHostView;
  import android.content.BroadcastReceiver;
  import android.content.ComponentName;
  import android.content.Context;
  import android.content.Intent;
  import android.content.res.Configuration;
  import android.content.res.Resources;
  import android.content.res.TypedArray;
  import android.content.res.XmlResourceParser;
  import android.graphics.Point;
  import android.graphics.Rect;
  import android.text.TextUtils;
  import android.util.AttributeSet;
  import android.util.DisplayMetrics;
  import android.util.Log;
  import android.util.SparseArray;
  import android.util.TypedValue;
  import android.util.Xml;
  
  import androidx.annotation.Nullable;
  import androidx.annotation.VisibleForTesting;
  
  import com.android.launcher3.config.FeatureFlags;
  import com.android.launcher3.graphics.IconShape;
  import com.android.launcher3.util.ConfigMonitor;
  import com.android.launcher3.util.DefaultDisplay;
  import com.android.launcher3.util.IntArray;
  import com.android.launcher3.util.MainThreadInitializedObject;
  import com.android.launcher3.util.Themes;
  
  import org.xmlpull.v1.XmlPullParser;
  import org.xmlpull.v1.XmlPullParserException;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Comparator;
  
  import static com.android.launcher3.Utilities.getDevicePrefs;
  import static com.android.launcher3.config.FeatureFlags.APPLY_CONFIG_AT_RUNTIME;
  import static com.android.launcher3.settings.SettingsActivity.GRID_OPTIONS_PREFERENCE_KEY;
  import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
  import static com.android.launcher3.util.PackageManagerHelper.getPackageFilter;
  
  public class InvariantDeviceProfile {
  
      public static final String TAG = "IDP";
      // We do not need any synchronization for this variable as its only written on UI thread.
      public static final MainThreadInitializedObject<InvariantDeviceProfile> INSTANCE =
              new MainThreadInitializedObject<>(InvariantDeviceProfile::new);
  
      private static final String KEY_IDP_GRID_NAME = "idp_grid_name";
  
      private static final float ICON_SIZE_DEFINED_IN_APP_DP = 48;
  
      public static final int CHANGE_FLAG_GRID = 1 << 0;
      public static final int CHANGE_FLAG_ICON_PARAMS = 1 << 1;
  
      public static final String KEY_ICON_PATH_REF = "pref_icon_shape_path";
  
      // Constants that affects the interpolation curve between statically defined device profile
      // buckets.
      private static final float KNEARESTNEIGHBOR = 3;
      private static final float WEIGHT_POWER = 5;
  
      // used to offset float not being able to express extremely small weights in extreme cases.
      private static final float WEIGHT_EFFICIENT = 100000f;
  
      private static final int CONFIG_ICON_MASK_RES_ID = Resources.getSystem().getIdentifier(
              "config_icon_mask", "string", "android");
  
      /**
       * Number of icons per row and column in the workspace.
       */
      public int numRows;
      public int numColumns;
  
      /**
       * Number of icons per row and column in the folder.
       */
      public int numFolderRows;
      public int numFolderColumns;
      public float iconSize;
      public String iconShapePath;
      public float landscapeIconSize;
      public int iconBitmapSize;
      public int fillResIconDpi;
      public float iconTextSize;
      public float allAppsIconSize;
      public float allAppsIconTextSize;
  
      private SparseArray<TypedValue> mExtraAttrs;
  
      /**
       * Number of icons inside the hotseat area.
       */
      public int numHotseatIcons;
  
      /**
       * Number of columns in the all apps list.
       */
      public int numAllAppsColumns;
  
      public int defaultLayoutId;
      int demoModeLayoutId;
  
      public DeviceProfile landscapeProfile;
      public DeviceProfile portraitProfile;
  
      public Point defaultWallpaperSize;
      public Rect defaultWidgetPadding;
  
      private final ArrayList<OnIDPChangeListener> mChangeListeners = new ArrayList<>();
      private ConfigMonitor mConfigMonitor;
      private OverlayMonitor mOverlayMonitor;
  
      @VisibleForTesting
      public InvariantDeviceProfile() {}
  
      private InvariantDeviceProfile(InvariantDeviceProfile p) {
          numRows = p.numRows;
          numColumns = p.numColumns;
          numFolderRows = p.numFolderRows;
          numFolderColumns = p.numFolderColumns;
          iconSize = p.iconSize;
          iconShapePath = p.iconShapePath;
          landscapeIconSize = p.landscapeIconSize;
          iconTextSize = p.iconTextSize;
          numHotseatIcons = p.numHotseatIcons;
          numAllAppsColumns = p.numAllAppsColumns;
          allAppsIconSize = p.allAppsIconSize;
          allAppsIconTextSize = p.allAppsIconTextSize;
          defaultLayoutId = p.defaultLayoutId;
          demoModeLayoutId = p.demoModeLayoutId;
          mExtraAttrs = p.mExtraAttrs;
          mOverlayMonitor = p.mOverlayMonitor;
      }
  
      private InvariantDeviceProfile(Context context) {
          String gridName = Utilities.getPrefs(context).getBoolean(GRID_OPTIONS_PREFERENCE_KEY, false)
                  ? Utilities.getPrefs(context).getString(KEY_IDP_GRID_NAME, null)
                  : null;
          initGrid(context, gridName);
          mConfigMonitor = new ConfigMonitor(context,
                  APPLY_CONFIG_AT_RUNTIME.get() ? this::onConfigChanged : this::killProcess);
          mOverlayMonitor = new OverlayMonitor(context);
      }
  
      /**
       * This constructor should NOT have any monitors by design.
       */
      public InvariantDeviceProfile(Context context, String gridName) {
          String newName = initGrid(context, gridName);
          if (newName == null || !newName.equals(gridName)) {
              throw new IllegalArgumentException("Unknown grid name");
          }
      }
  
      /**
       * Retrieve system defined or RRO overriden icon shape.
       */
      private static String getIconShapePath(Context context) {
          if (CONFIG_ICON_MASK_RES_ID == 0) {
              Log.e(TAG, "Icon mask res identifier failed to retrieve.");
              return "";
          }
          return context.getResources().getString(CONFIG_ICON_MASK_RES_ID);
      }
  
      private String initGrid(Context context, String gridName) {
          DefaultDisplay.Info displayInfo = DefaultDisplay.INSTANCE.get(context).getInfo();
  
          Point smallestSize = new Point(displayInfo.smallestSize);
          Point largestSize = new Point(displayInfo.largestSize);
  
          // This guarantees that width < height
          float minWidthDps = Utilities.dpiFromPx(Math.min(smallestSize.x, smallestSize.y),
                  displayInfo.metrics);
          float minHeightDps = Utilities.dpiFromPx(Math.min(largestSize.x, largestSize.y),
                  displayInfo.metrics);
  
          Point realSize = new Point(displayInfo.realSize);
          // The real size never changes. smallSide and largeSide will remain the
          // same in any orientation.
          int smallSide = Math.min(realSize.x, realSize.y);
          int largeSide = Math.max(realSize.x, realSize.y);
  
          // We want a list of all options as well as the list of filtered options. This allows us
          // to have a consistent UI for areas that the grid size change should not affect
          // ie. All Apps should be consistent between grid sizes.
          ArrayList<DisplayOption> allOptions = new ArrayList<>();
          ArrayList<DisplayOption> filteredOptions = new ArrayList<>();
          getPredefinedDeviceProfiles(context, gridName, filteredOptions, allOptions);
  
          if (allOptions.isEmpty() && filteredOptions.isEmpty()) {
              throw new RuntimeException("No display option with canBeDefault=true");
          }
  
          // Sort the profiles based on the closeness to the device size
          Comparator<DisplayOption> comparator = (a, b) -> Float.compare(dist(minWidthDps,
                  minHeightDps, a.minWidthDps, a.minHeightDps),
                  dist(minWidthDps, minHeightDps, b.minWidthDps, b.minHeightDps));
  
          // Calculate the device profiles as if there is no grid override.
          Collections.sort(allOptions, comparator);
          DisplayOption interpolatedDisplayOption =
                  invDistWeightedInterpolate(minWidthDps,  minHeightDps, allOptions);
          initGridOption(context, allOptions, interpolatedDisplayOption, displayInfo.metrics);
  
          // Create IDP with no grid override values.
          InvariantDeviceProfile originalIDP = new InvariantDeviceProfile(this);
          originalIDP.landscapeProfile = new DeviceProfile(context, this, null, smallestSize,
                  largestSize, largeSide, smallSide, true /* isLandscape */,
                  false /* isMultiWindowMode */);
          originalIDP.portraitProfile = new DeviceProfile(context, this, null, smallestSize,
                  largestSize, smallSide, largeSide, false /* isLandscape */,
                  false /* isMultiWindowMode */);
  
          if (filteredOptions.isEmpty()) {
              filteredOptions = allOptions;
  
              landscapeProfile = originalIDP.landscapeProfile;
              portraitProfile = originalIDP.portraitProfile;
          } else {
              Collections.sort(filteredOptions, comparator);
              interpolatedDisplayOption =
                      invDistWeightedInterpolate(minWidthDps, minHeightDps, filteredOptions);
  
              initGridOption(context, filteredOptions, interpolatedDisplayOption,
                      displayInfo.metrics);
              if (FeatureFlags.MAINTAIN_DRAWER_GRID) {
                  numAllAppsColumns = originalIDP.numAllAppsColumns;
              }
  
              landscapeProfile = new DeviceProfile(context, this, originalIDP, smallestSize,
                      largestSize, largeSide, smallSide, true /* isLandscape */,
                      false /* isMultiWindowMode */);
              portraitProfile = new DeviceProfile(context, this, originalIDP, smallestSize,
                      largestSize, smallSide, largeSide, false /* isLandscape */,
                      false /* isMultiWindowMode */);
          }
  
          GridOption closestProfile = filteredOptions.get(0).grid;
          if (!closestProfile.name.equals(gridName)) {
              Utilities.getPrefs(context).edit()
                      .putString(KEY_IDP_GRID_NAME, closestProfile.name).apply();
          }
  
          // We need to ensure that there is enough extra space in the wallpaper
          // for the intended parallax effects
          if (context.getResources().getConfiguration().smallestScreenWidthDp >= 720) {
              defaultWallpaperSize = new Point(
                      (int) (largeSide * wallpaperTravelToScreenWidthRatio(largeSide, smallSide)),
                      largeSide);
          } else {
              defaultWallpaperSize = new Point(Math.max(smallSide * 2, largeSide), largeSide);
          }
  
          ComponentName cn = new ComponentName(context.getPackageName(), getClass().getName());
          defaultWidgetPadding = AppWidgetHostView.getDefaultPaddingForWidget(context, cn, null);
  
          return closestProfile.name;
      }
  
      private void initGridOption(Context context, ArrayList<DisplayOption> options,
              DisplayOption displayOption, DisplayMetrics metrics) {
          GridOption closestProfile = options.get(0).grid;
          numRows = closestProfile.numRows;
          numColumns = closestProfile.numColumns;
          numHotseatIcons = closestProfile.numHotseatIcons;
          defaultLayoutId = closestProfile.defaultLayoutId;
          demoModeLayoutId = closestProfile.demoModeLayoutId;
          numFolderRows = closestProfile.numFolderRows;
          numFolderColumns = closestProfile.numFolderColumns;
          numAllAppsColumns = numColumns;
  
          mExtraAttrs = closestProfile.extraAttrs;
  
          iconSize = displayOption.iconSize;
          iconShapePath = getIconShapePath(context);
          landscapeIconSize = displayOption.landscapeIconSize;
          iconBitmapSize = ResourceUtils.pxFromDp(iconSize, metrics);
          iconTextSize = displayOption.iconTextSize;
          fillResIconDpi = getLauncherIconDensity(iconBitmapSize);
  
          // If the partner customization apk contains any grid overrides, apply them
          // Supported overrides: numRows, numColumns, iconSize
          applyPartnerDeviceProfileOverrides(context, metrics);
      }
  
  
      @Nullable
      public TypedValue getAttrValue(int attr) {
          return mExtraAttrs == null ? null : mExtraAttrs.get(attr);
      }
  
      public void addOnChangeListener(OnIDPChangeListener listener) {
          mChangeListeners.add(listener);
      }
  
      public void removeOnChangeListener(OnIDPChangeListener listener) {
          mChangeListeners.remove(listener);
      }
  
      private void killProcess(Context context) {
          Log.e("ConfigMonitor", "restarting launcher");
          android.os.Process.killProcess(android.os.Process.myPid());
      }
  
      public void verifyConfigChangedInBackground(final Context context) {
          String savedIconMaskPath = getDevicePrefs(context).getString(KEY_ICON_PATH_REF, "");
          // Good place to check if grid size changed in themepicker when launcher was dead.
          if (savedIconMaskPath.isEmpty()) {
              getDevicePrefs(context).edit().putString(KEY_ICON_PATH_REF, getIconShapePath(context))
                      .apply();
          } else if (!savedIconMaskPath.equals(getIconShapePath(context))) {
              getDevicePrefs(context).edit().putString(KEY_ICON_PATH_REF, getIconShapePath(context))
                      .apply();
              apply(context, CHANGE_FLAG_ICON_PARAMS);
          }
      }
  
      public void setCurrentGrid(Context context, String gridName) {
          Context appContext = context.getApplicationContext();
          Utilities.getPrefs(appContext).edit().putString(KEY_IDP_GRID_NAME, gridName).apply();
          MAIN_EXECUTOR.execute(() -> onConfigChanged(appContext));
      }
  
      private void onConfigChanged(Context context) {
          // Config changes, what shall we do?
          InvariantDeviceProfile oldProfile = new InvariantDeviceProfile(this);
  
          // Re-init grid
          String gridName = Utilities.getPrefs(context).getBoolean(GRID_OPTIONS_PREFERENCE_KEY, false)
                  ? Utilities.getPrefs(context).getString(KEY_IDP_GRID_NAME, null)
                  : null;
          initGrid(context, gridName);
  
          int changeFlags = 0;
          if (numRows != oldProfile.numRows ||
                  numColumns != oldProfile.numColumns ||
                  numFolderColumns != oldProfile.numFolderColumns ||
                  numFolderRows != oldProfile.numFolderRows ||
                  numHotseatIcons != oldProfile.numHotseatIcons) {
              changeFlags |= CHANGE_FLAG_GRID;
          }
  
          if (iconSize != oldProfile.iconSize || iconBitmapSize != oldProfile.iconBitmapSize ||
                  !iconShapePath.equals(oldProfile.iconShapePath)) {
              changeFlags |= CHANGE_FLAG_ICON_PARAMS;
          }
          if (!iconShapePath.equals(oldProfile.iconShapePath)) {
              IconShape.init(context);
          }
  
          apply(context, changeFlags);
      }
  
      private void apply(Context context, int changeFlags) {
          // Create a new config monitor
          mConfigMonitor.unregister();
          mConfigMonitor = new ConfigMonitor(context, this::onConfigChanged);
  
          for (OnIDPChangeListener listener : mChangeListeners) {
              listener.onIdpChanged(changeFlags, this);
          }
      }
  
      /**
       * @param gridName The current grid name.
       * @param filteredOptionsOut List filled with all the filtered options based on gridName.
       * @param allOptionsOut List filled with all the options that can be the default option.
       */
      static void getPredefinedDeviceProfiles(Context context, String gridName,
              ArrayList<DisplayOption> filteredOptionsOut, ArrayList<DisplayOption> allOptionsOut) {
          ArrayList<DisplayOption> profiles = new ArrayList<>();
          try (XmlResourceParser parser = context.getResources().getXml(R.xml.device_profiles)) {
              final int depth = parser.getDepth();
              int type;
              while (((type = parser.next()) != XmlPullParser.END_TAG ||
                      parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) {
                  if ((type == XmlPullParser.START_TAG)
                          && GridOption.TAG_NAME.equals(parser.getName())) {
  
                      GridOption gridOption = new GridOption(context, Xml.asAttributeSet(parser));
                      final int displayDepth = parser.getDepth();
                      while (((type = parser.next()) != XmlPullParser.END_TAG ||
                              parser.getDepth() > displayDepth)
                              && type != XmlPullParser.END_DOCUMENT) {
                          if ((type == XmlPullParser.START_TAG) && "display-option".equals(
                                  parser.getName())) {
                              profiles.add(new DisplayOption(
                                      gridOption, context, Xml.asAttributeSet(parser)));
                          }
                      }
                  }
              }
          } catch (IOException|XmlPullParserException e) {
              throw new RuntimeException(e);
          }
  
          if (!TextUtils.isEmpty(gridName)) {
              for (DisplayOption option : profiles) {
                  if (gridName.equals(option.grid.name)) {
                      filteredOptionsOut.add(option);
                  }
              }
          }
  
          for (DisplayOption option : profiles) {
              if (option.canBeDefault) {
                  allOptionsOut.add(option);
              }
          }
      }
  
      private int getLauncherIconDensity(int requiredSize) {
          // Densities typically defined by an app.
          int[] densityBuckets = new int[] {
                  DisplayMetrics.DENSITY_LOW,
                  DisplayMetrics.DENSITY_MEDIUM,
                  DisplayMetrics.DENSITY_TV,
                  DisplayMetrics.DENSITY_HIGH,
                  DisplayMetrics.DENSITY_XHIGH,
                  DisplayMetrics.DENSITY_XXHIGH,
                  DisplayMetrics.DENSITY_XXXHIGH
          };
  
          int density = DisplayMetrics.DENSITY_XXXHIGH;
          for (int i = densityBuckets.length - 1; i >= 0; i--) {
              float expectedSize = ICON_SIZE_DEFINED_IN_APP_DP * densityBuckets[i]
                      / DisplayMetrics.DENSITY_DEFAULT;
              if (expectedSize >= requiredSize) {
                  density = densityBuckets[i];
              }
          }
  
          return density;
      }
  
      /**
       * Apply any Partner customization grid overrides.
       *
       * Currently we support: all apps row / column count.
       */
      private void applyPartnerDeviceProfileOverrides(Context context, DisplayMetrics dm) {
          Partner p = Partner.get(context.getPackageManager());
          if (p != null) {
              p.applyInvariantDeviceProfileOverrides(this, dm);
          }
      }
  
      private static float dist(float x0, float y0, float x1, float y1) {
          return (float) Math.hypot(x1 - x0, y1 - y0);
      }
  
      @VisibleForTesting
      static DisplayOption invDistWeightedInterpolate(float width, float height,
                  ArrayList<DisplayOption> points) {
          float weights = 0;
  
          DisplayOption p = points.get(0);
          if (dist(width, height, p.minWidthDps, p.minHeightDps) == 0) {
              return p;
          }
  
          DisplayOption out = new DisplayOption();
          for (int i = 0; i < points.size() && i < KNEARESTNEIGHBOR; ++i) {
              p = points.get(i);
              float w = weight(width, height, p.minWidthDps, p.minHeightDps, WEIGHT_POWER);
              weights += w;
              out.add(new DisplayOption().add(p).multiply(w));
          }
          return out.multiply(1.0f / weights);
      }
  
      public DeviceProfile getDeviceProfile(Context context) {
          return context.getResources().getConfiguration().orientation
                  == Configuration.ORIENTATION_LANDSCAPE ? landscapeProfile : portraitProfile;
      }
  
      private static float weight(float x0, float y0, float x1, float y1, float pow) {
          float d = dist(x0, y0, x1, y1);
          if (Float.compare(d, 0f) == 0) {
              return Float.POSITIVE_INFINITY;
          }
          return (float) (WEIGHT_EFFICIENT / Math.pow(d, pow));
      }
  
      /**
       * As a ratio of screen height, the total distance we want the parallax effect to span
       * horizontally
       */
      private static float wallpaperTravelToScreenWidthRatio(int width, int height) {
          float aspectRatio = width / (float) height;
  
          // At an aspect ratio of 16/10, the wallpaper parallax effect should span 1.5 * screen width
          // At an aspect ratio of 10/16, the wallpaper parallax effect should span 1.2 * screen width
          // We will use these two data points to extrapolate how much the wallpaper parallax effect
          // to span (ie travel) at any aspect ratio:
  
          final float ASPECT_RATIO_LANDSCAPE = 16/10f;
          final float ASPECT_RATIO_PORTRAIT = 10/16f;
          final float WALLPAPER_WIDTH_TO_SCREEN_RATIO_LANDSCAPE = 1.5f;
          final float WALLPAPER_WIDTH_TO_SCREEN_RATIO_PORTRAIT = 1.2f;
  
          // To find out the desired width at different aspect ratios, we use the following two
          // formulas, where the coefficient on x is the aspect ratio (width/height):
          //   (16/10)x + y = 1.5
          //   (10/16)x + y = 1.2
          // We solve for x and y and end up with a final formula:
          final float x =
                  (WALLPAPER_WIDTH_TO_SCREEN_RATIO_LANDSCAPE - WALLPAPER_WIDTH_TO_SCREEN_RATIO_PORTRAIT) /
                          (ASPECT_RATIO_LANDSCAPE - ASPECT_RATIO_PORTRAIT);
          final float y = WALLPAPER_WIDTH_TO_SCREEN_RATIO_PORTRAIT - x * ASPECT_RATIO_PORTRAIT;
          return x * aspectRatio + y;
      }
  
      public interface OnIDPChangeListener {
  
          void onIdpChanged(int changeFlags, InvariantDeviceProfile profile);
      }
  
  
      public static final class GridOption {
  
          public static final String TAG_NAME = "grid-option";
  
          public final String name;
          public final int numRows;
          public final int numColumns;
  
          private final int numFolderRows;
          private final int numFolderColumns;
  
          private final int numHotseatIcons;
  
          private final int defaultLayoutId;
          private final int demoModeLayoutId;
  
          private final SparseArray<TypedValue> extraAttrs;
  
          public GridOption(Context context, AttributeSet attrs) {
              TypedArray a = context.obtainStyledAttributes(
                      attrs, R.styleable.GridDisplayOption);
              name = a.getString(R.styleable.GridDisplayOption_name);
              numRows = a.getInt(R.styleable.GridDisplayOption_numRows, 0);
              numColumns = a.getInt(R.styleable.GridDisplayOption_numColumns, 0);
  
              defaultLayoutId = a.getResourceId(
                      R.styleable.GridDisplayOption_defaultLayoutId, 0);
              demoModeLayoutId = a.getResourceId(
                      R.styleable.GridDisplayOption_demoModeLayoutId, defaultLayoutId);
              numHotseatIcons = a.getInt(
                      R.styleable.GridDisplayOption_numHotseatIcons, numColumns);
              numFolderRows = a.getInt(
                      R.styleable.GridDisplayOption_numFolderRows, numRows);
              numFolderColumns = a.getInt(
                      R.styleable.GridDisplayOption_numFolderColumns, numColumns);
  
              a.recycle();
  
              extraAttrs = Themes.createValueMap(context, attrs,
                      IntArray.wrap(R.styleable.GridDisplayOption));
          }
      }
  
      private static final class DisplayOption {
          private final GridOption grid;
  
          private final String name;
          private final float minWidthDps;
          private final float minHeightDps;
          private final boolean canBeDefault;
  
          private float iconSize;
          private float iconTextSize;
          private float landscapeIconSize;
  
          DisplayOption(GridOption grid, Context context, AttributeSet attrs) {
              this.grid = grid;
  
              TypedArray a = context.obtainStyledAttributes(
                      attrs, R.styleable.ProfileDisplayOption);
  
              name = a.getString(R.styleable.ProfileDisplayOption_name);
              minWidthDps = a.getFloat(R.styleable.ProfileDisplayOption_minWidthDps, 0);
              minHeightDps = a.getFloat(R.styleable.ProfileDisplayOption_minHeightDps, 0);
              canBeDefault = a.getBoolean(
                      R.styleable.ProfileDisplayOption_canBeDefault, false);
  
              iconSize = a.getFloat(R.styleable.ProfileDisplayOption_iconImageSize, 0);
              landscapeIconSize = a.getFloat(R.styleable.ProfileDisplayOption_landscapeIconSize,
                      iconSize);
              iconTextSize = a.getFloat(R.styleable.ProfileDisplayOption_iconTextSize, 0);
  
              a.recycle();
          }
  
          DisplayOption() {
              grid = null;
              name = null;
              minWidthDps = 0;
              minHeightDps = 0;
              canBeDefault = false;
          }
  
          private DisplayOption multiply(float w) {
              iconSize *= w;
              landscapeIconSize *= w;
              iconTextSize *= w;
              return this;
          }
  
          private DisplayOption add(DisplayOption p) {
              iconSize += p.iconSize;
              landscapeIconSize += p.landscapeIconSize;
              iconTextSize += p.iconTextSize;
              return this;
          }
      }
  
      private class OverlayMonitor extends BroadcastReceiver {
  
          private final String ACTION_OVERLAY_CHANGED = "android.intent.action.OVERLAY_CHANGED";
  
          OverlayMonitor(Context context) {
              context.registerReceiver(this, getPackageFilter("android", ACTION_OVERLAY_CHANGED));
          }
  
          @Override
          public void onReceive(Context context, Intent intent) {
              onConfigChanged(context);
          }
      }
  }