content: /*
   * Copyright 2019 Google LLC
   *
   * 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
   *
   *     https://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 me.zhanghai.android.fastscroll;
  
  import android.graphics.Rect;
  import android.graphics.drawable.Drawable;
  import android.view.ViewGroup;
  import android.webkit.WebView;
  import android.widget.ScrollView;
  import android.widget.TextView;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import androidx.core.util.Consumer;
  import androidx.core.widget.NestedScrollView;
  import androidx.recyclerview.widget.RecyclerView;
  
  public class FastScrollerBuilder {
  
      @NonNull
      private final ViewGroup mView;
  
      @Nullable
      private FastScroller.ViewHelper mViewHelper;
  
      @Nullable
      private PopupTextProvider mPopupTextProvider;
  
      @Nullable
      private Rect mPadding;
  
      @NonNull
      private Drawable mTrackDrawable;
  
      @NonNull
      private Drawable mThumbDrawable;
  
      @NonNull
      private Consumer<TextView> mPopupStyle;
  
      @Nullable
      private FastScroller.AnimationHelper mAnimationHelper;
  
      public FastScrollerBuilder(@NonNull ViewGroup view) {
          mView = view;
      }
  
      @NonNull
      public FastScrollerBuilder setViewHelper(@Nullable FastScroller.ViewHelper viewHelper) {
          mViewHelper = viewHelper;
          return this;
      }
  
      @NonNull
      public FastScrollerBuilder setPopupTextProvider(@Nullable PopupTextProvider popupTextProvider) {
          mPopupTextProvider = popupTextProvider;
          return this;
      }
  
      @NonNull
      public FastScrollerBuilder setPadding(int left, int top, int right, int bottom) {
          if (mPadding == null) {
              mPadding = new Rect();
          }
          mPadding.set(left, top, right, bottom);
          return this;
      }
  
      @NonNull
      public FastScrollerBuilder setPadding(@Nullable Rect padding) {
          if (padding != null) {
              if (mPadding == null) {
                  mPadding = new Rect();
              }
              mPadding.set(padding);
          } else {
              mPadding = null;
          }
          return this;
      }
  
      @NonNull
      public FastScrollerBuilder setTrackDrawable(@NonNull Drawable trackDrawable) {
          mTrackDrawable = trackDrawable;
          return this;
      }
  
      @NonNull
      public FastScrollerBuilder setThumbDrawable(@NonNull Drawable thumbDrawable) {
          mThumbDrawable = thumbDrawable;
          return this;
      }
  
      @NonNull
      public FastScrollerBuilder setPopupStyle(@NonNull Consumer<TextView> popupStyle) {
          mPopupStyle = popupStyle;
          return this;
      }
  
      public void setAnimationHelper(@Nullable FastScroller.AnimationHelper animationHelper) {
          mAnimationHelper = animationHelper;
      }
  
      public void disableScrollbarAutoHide() {
          DefaultAnimationHelper animationHelper = new DefaultAnimationHelper(mView);
          animationHelper.setScrollbarAutoHideEnabled(false);
          mAnimationHelper = animationHelper;
      }
  
      @NonNull
      public FastScroller build() {
          return new FastScroller(mView, getOrCreateViewHelper(), mPadding, mTrackDrawable,
                  mThumbDrawable, mPopupStyle, getOrCreateAnimationHelper());
      }
  
      @NonNull
      private FastScroller.ViewHelper getOrCreateViewHelper() {
          if (mViewHelper != null) {
              return mViewHelper;
          }
          if (mView instanceof ViewHelperProvider) {
              return ((ViewHelperProvider) mView).getViewHelper();
          } else if (mView instanceof RecyclerView) {
              return new RecyclerViewHelper((RecyclerView) mView, mPopupTextProvider);
          } else if (mView instanceof NestedScrollView) {
              throw new UnsupportedOperationException("Please use "
                      + FastScrollNestedScrollView.class.getSimpleName() + " instead of "
                      + NestedScrollView.class.getSimpleName() + "for fast scroll");
          } else if (mView instanceof ScrollView) {
              throw new UnsupportedOperationException("Please use "
                      + FastScrollScrollView.class.getSimpleName() + " instead of "
                      + ScrollView.class.getSimpleName() + "for fast scroll");
          } else if (mView instanceof WebView) {
              throw new UnsupportedOperationException("Please use "
                      + FastScrollWebView.class.getSimpleName() + " instead of "
                      + WebView.class.getSimpleName() + "for fast scroll");
          } else {
              throw new UnsupportedOperationException(mView.getClass().getSimpleName()
                      + " is not supported for fast scroll");
          }
      }
  
      @NonNull
      private FastScroller.AnimationHelper getOrCreateAnimationHelper() {
          if (mAnimationHelper != null) {
              return mAnimationHelper;
          }
          return new DefaultAnimationHelper(mView);
      }
  }
  