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					package io.legado.app.ui.changesource | 
				
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					import androidx.recyclerview.widget.DiffUtil | 
				
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					import io.legado.app.data.entities.SearchBook | 
				
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					class DiffCallBack(private val oldItems: List<SearchBook>, private val newItems: List<SearchBook>) : | 
				
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					    DiffUtil.Callback() { | 
				
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					    override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean { | 
				
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					        return oldItems[oldItemPosition].bookUrl == newItems[newItemPosition].bookUrl | 
				
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					    } | 
				
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					    override fun getOldListSize(): Int { | 
				
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					        return oldItems.size | 
				
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					    } | 
				
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					    override fun getNewListSize(): Int { | 
				
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					        return newItems.size | 
				
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					    } | 
				
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					    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean { | 
				
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					        return oldItems[oldItemPosition].originName == newItems[newItemPosition].originName | 
				
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					                && oldItems[oldItemPosition].latestChapterTitle == newItems[newItemPosition].originName | 
				
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					    } | 
				
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					} | 
				
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