src/com/android/launcher3/allapps/BaseAllAppsAdapter.java - platform/packages/apps/Launcher3 - Git at Google

 /*
  * Copyright (C) 2022 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.allapps;

 import static com.android.launcher3.touch.ItemLongClickListener.INSTANCE_ALL_APPS;

 import android.content.Context;
 import android.content.res.Resources;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnFocusChangeListener;
 import android.view.View.OnLongClickListener;
 import android.view.ViewGroup;
 import android.widget.TextView;

 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.recyclerview.widget.RecyclerView;

 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.R;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.views.ActivityContext;

 import java.util.Arrays;

 /**
  * Adapter for all the apps.
  *
  * @param <T> Type of context inflating all apps.
  */
 public abstract class BaseAllAppsAdapter<T extends Context & ActivityContext> extends
         RecyclerView.Adapter<BaseAllAppsAdapter.ViewHolder> {

     public static final String TAG = "BaseAllAppsAdapter";

     // A normal icon
     public static final int VIEW_TYPE_ICON = 1 << 1;
     // The message shown when there are no filtered results
     public static final int VIEW_TYPE_EMPTY_SEARCH = 1 << 2;
     // A divider that separates the apps list and the search market button
     public static final int VIEW_TYPE_ALL_APPS_DIVIDER = 1 << 3;

     public static final int VIEW_TYPE_WORK_EDU_CARD = 1 << 4;
     public static final int VIEW_TYPE_WORK_DISABLED_CARD = 1 << 5;

     public static final int NEXT_ID = 6;

     // Common view type masks
     public static final int VIEW_TYPE_MASK_DIVIDER = VIEW_TYPE_ALL_APPS_DIVIDER;
     public static final int VIEW_TYPE_MASK_ICON = VIEW_TYPE_ICON;


     protected final BaseAdapterProvider[] mAdapterProviders;

     /**
      * ViewHolder for each icon.
      */
     public static class ViewHolder extends RecyclerView.ViewHolder {

         public ViewHolder(View v) {
             super(v);
         }
     }

     /** Sets the number of apps to be displayed in one row of the all apps screen. */
     public abstract void setAppsPerRow(int appsPerRow);

     /**
      * Info about a particular adapter item (can be either section or app)
      */
     public static class AdapterItem {
         /** Common properties */
         // The type of this item
         public final int viewType;

         // The row that this item shows up on
         public int rowIndex;
         // The index of this app in the row
         public int rowAppIndex;
         // The associated ItemInfoWithIcon for the item
         public AppInfo itemInfo = null;

         public AdapterItem(int viewType) {
             this.viewType = viewType;
         }

         /**
          * Factory method for AppIcon AdapterItem
          */
         public static AdapterItem asApp(AppInfo appInfo) {
             AdapterItem item = new AdapterItem(VIEW_TYPE_ICON);
             item.itemInfo = appInfo;
             return item;
         }

         protected boolean isCountedForAccessibility() {
             return viewType == VIEW_TYPE_ICON;
         }

         /**
          * Returns true if the items represent the same object
          */
         public boolean isSameAs(AdapterItem other) {
             return (other.viewType == viewType) && (other.getClass() == getClass());
         }

         /**
          * This is called only if {@link #isSameAs} returns true to check if the contents are same
          * as well. Returning true will prevent redrawing of thee item.
          */
         public boolean isContentSame(AdapterItem other) {
             return itemInfo == null && other.itemInfo == null;
         }

         /** Sets the alpha of the decorator for this item. Returns true if successful. */
         public boolean setDecorationFillAlpha(int alpha) {
             return false;
         }
     }

     protected final T mActivityContext;
     protected final AlphabeticalAppsList<T> mApps;
     // The text to show when there are no search results and no market search handler.
     protected int mAppsPerRow;

     protected final LayoutInflater mLayoutInflater;
     protected final OnClickListener mOnIconClickListener;
     protected OnLongClickListener mOnIconLongClickListener = INSTANCE_ALL_APPS;
     protected OnFocusChangeListener mIconFocusListener;
     private final int mExtraHeight;

     public BaseAllAppsAdapter(T activityContext, LayoutInflater inflater,
             AlphabeticalAppsList<T> apps, BaseAdapterProvider[] adapterProviders) {
         Resources res = activityContext.getResources();
         mActivityContext = activityContext;
         mApps = apps;
         mLayoutInflater = inflater;

         mOnIconClickListener = mActivityContext.getItemOnClickListener();

         mAdapterProviders = adapterProviders;
         mExtraHeight = res.getDimensionPixelSize(R.dimen.all_apps_height_extra);
     }

     /**
      * Sets the long click listener for icons
      */
     public void setOnIconLongClickListener(@Nullable OnLongClickListener listener) {
         mOnIconLongClickListener = listener;
     }

     /** Checks if the passed viewType represents all apps divider. */
     public static boolean isDividerViewType(int viewType) {
         return isViewType(viewType, VIEW_TYPE_MASK_DIVIDER);
     }

     /** Checks if the passed viewType represents all apps icon. */
     public static boolean isIconViewType(int viewType) {
         return isViewType(viewType, VIEW_TYPE_MASK_ICON);
     }

     public void setIconFocusListener(OnFocusChangeListener focusListener) {
         mIconFocusListener = focusListener;
     }

     /**
      * Returns the layout manager.
      */
     public abstract RecyclerView.LayoutManager getLayoutManager();

     @Override
     public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         switch (viewType) {
             case VIEW_TYPE_ICON:
                 int layout = !FeatureFlags.ENABLE_TWOLINE_ALLAPPS.get() ? R.layout.all_apps_icon
                         : R.layout.all_apps_icon_twoline;
                 BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
                         layout, parent, false);
                 icon.setLongPressTimeoutFactor(1f);
                 icon.setOnFocusChangeListener(mIconFocusListener);
                 icon.setOnClickListener(mOnIconClickListener);
                 icon.setOnLongClickListener(mOnIconLongClickListener);
                 // Ensure the all apps icon height matches the workspace icons in portrait mode.
                 icon.getLayoutParams().height =
                         mActivityContext.getDeviceProfile().allAppsCellHeightPx;
                 if (FeatureFlags.ENABLE_TWOLINE_ALLAPPS.get()) {
                     icon.getLayoutParams().height += mExtraHeight;
                 }
                 return new ViewHolder(icon);
             case VIEW_TYPE_EMPTY_SEARCH:
                 return new ViewHolder(mLayoutInflater.inflate(R.layout.all_apps_empty_search,
                         parent, false));
             case VIEW_TYPE_ALL_APPS_DIVIDER:
                 return new ViewHolder(mLayoutInflater.inflate(
                         R.layout.all_apps_divider, parent, false));
             case VIEW_TYPE_WORK_EDU_CARD:
                 return new ViewHolder(mLayoutInflater.inflate(
                         R.layout.work_apps_edu, parent, false));
             case VIEW_TYPE_WORK_DISABLED_CARD:
                 return new ViewHolder(mLayoutInflater.inflate(
                         R.layout.work_apps_paused, parent, false));
             default:
                 BaseAdapterProvider adapterProvider = getAdapterProvider(viewType);
                 if (adapterProvider != null) {
                     return adapterProvider.onCreateViewHolder(mLayoutInflater, parent, viewType);
                 }
                 throw new RuntimeException("Unexpected view type" + viewType);
         }
     }

     @Override
     public void onBindViewHolder(ViewHolder holder, int position) {
         switch (holder.getItemViewType()) {
             case VIEW_TYPE_ICON: {
                 AdapterItem adapterItem = mApps.getAdapterItems().get(position);
                 BubbleTextView icon = (BubbleTextView) holder.itemView;
                 icon.reset();
                 icon.applyFromApplicationInfo(adapterItem.itemInfo);
                 break;
             }
             case VIEW_TYPE_EMPTY_SEARCH: {
                 AppInfo info = mApps.getAdapterItems().get(position).itemInfo;
                 if (info != null) {
                     ((TextView) holder.itemView).setText(mActivityContext.getString(
                             R.string.all_apps_no_search_results, info.title));
                 }
                 break;
             }
             case VIEW_TYPE_ALL_APPS_DIVIDER:
             case VIEW_TYPE_WORK_DISABLED_CARD:
                 // nothing to do
                 break;
             case VIEW_TYPE_WORK_EDU_CARD:
                 ((WorkEduCard) holder.itemView).setPosition(position);
                 break;
             default:
                 BaseAdapterProvider adapterProvider = getAdapterProvider(holder.getItemViewType());
                 if (adapterProvider != null) {
                     adapterProvider.onBindView(holder, position);
                 }
         }
     }

     @Override
     public void onViewRecycled(@NonNull ViewHolder holder) {
         super.onViewRecycled(holder);
     }

     @Override
     public boolean onFailedToRecycleView(ViewHolder holder) {
         // Always recycle and we will reset the view when it is bound
         return true;
     }

     @Override
     public int getItemCount() {
         return mApps.getAdapterItems().size();
     }

     @Override
     public int getItemViewType(int position) {
         AdapterItem item = mApps.getAdapterItems().get(position);
         return item.viewType;
     }

     protected static boolean isViewType(int viewType, int viewTypeMask) {
         return (viewType & viewTypeMask) != 0;
     }

     @Nullable
     protected BaseAdapterProvider getAdapterProvider(int viewType) {
         return Arrays.stream(mAdapterProviders).filter(
                 adapterProvider -> adapterProvider.isViewSupported(viewType)).findFirst().orElse(
                 null);
     }
 }
	/*
	* Copyright (C) 2022 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.allapps;

	import static com.android.launcher3.touch.ItemLongClickListener.INSTANCE_ALL_APPS;

	import android.content.Context;
	import android.content.res.Resources;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.View.OnClickListener;
	import android.view.View.OnFocusChangeListener;
	import android.view.View.OnLongClickListener;
	import android.view.ViewGroup;
	import android.widget.TextView;

	import androidx.annotation.NonNull;
	import androidx.annotation.Nullable;
	import androidx.recyclerview.widget.RecyclerView;

	import com.android.launcher3.BubbleTextView;
	import com.android.launcher3.R;
	import com.android.launcher3.config.FeatureFlags;
	import com.android.launcher3.model.data.AppInfo;
	import com.android.launcher3.views.ActivityContext;

	import java.util.Arrays;

	/**
	* Adapter for all the apps.
	*
	* @param <T> Type of context inflating all apps.
	*/
	public abstract class BaseAllAppsAdapter<T extends Context & ActivityContext> extends
	RecyclerView.Adapter<BaseAllAppsAdapter.ViewHolder> {

	public static final String TAG = "BaseAllAppsAdapter";

	// A normal icon
	public static final int VIEW_TYPE_ICON = 1 << 1;
	// The message shown when there are no filtered results
	public static final int VIEW_TYPE_EMPTY_SEARCH = 1 << 2;
	// A divider that separates the apps list and the search market button
	public static final int VIEW_TYPE_ALL_APPS_DIVIDER = 1 << 3;

	public static final int VIEW_TYPE_WORK_EDU_CARD = 1 << 4;
	public static final int VIEW_TYPE_WORK_DISABLED_CARD = 1 << 5;

	public static final int NEXT_ID = 6;

	// Common view type masks
	public static final int VIEW_TYPE_MASK_DIVIDER = VIEW_TYPE_ALL_APPS_DIVIDER;
	public static final int VIEW_TYPE_MASK_ICON = VIEW_TYPE_ICON;


	protected final BaseAdapterProvider[] mAdapterProviders;

	/**
	* ViewHolder for each icon.
	*/
	public static class ViewHolder extends RecyclerView.ViewHolder {

	public ViewHolder(View v) {
	super(v);
	}
	}

	/** Sets the number of apps to be displayed in one row of the all apps screen. */
	public abstract void setAppsPerRow(int appsPerRow);

	/**
	* Info about a particular adapter item (can be either section or app)
	*/
	public static class AdapterItem {
	/** Common properties */
	// The type of this item
	public final int viewType;

	// The row that this item shows up on
	public int rowIndex;
	// The index of this app in the row
	public int rowAppIndex;
	// The associated ItemInfoWithIcon for the item
	public AppInfo itemInfo = null;

	public AdapterItem(int viewType) {
	this.viewType = viewType;
	}

	/**
	* Factory method for AppIcon AdapterItem
	*/
	public static AdapterItem asApp(AppInfo appInfo) {
	AdapterItem item = new AdapterItem(VIEW_TYPE_ICON);
	item.itemInfo = appInfo;
	return item;
	}

	protected boolean isCountedForAccessibility() {
	return viewType == VIEW_TYPE_ICON;
	}

	/**
	* Returns true if the items represent the same object
	*/
	public boolean isSameAs(AdapterItem other) {
	return (other.viewType == viewType) && (other.getClass() == getClass());
	}

	/**
	* This is called only if {@link #isSameAs} returns true to check if the contents are same
	* as well. Returning true will prevent redrawing of thee item.
	*/
	public boolean isContentSame(AdapterItem other) {
	return itemInfo == null && other.itemInfo == null;
	}

	/** Sets the alpha of the decorator for this item. Returns true if successful. */
	public boolean setDecorationFillAlpha(int alpha) {
	return false;
	}
	}

	protected final T mActivityContext;
	protected final AlphabeticalAppsList<T> mApps;
	// The text to show when there are no search results and no market search handler.
	protected int mAppsPerRow;

	protected final LayoutInflater mLayoutInflater;
	protected final OnClickListener mOnIconClickListener;
	protected OnLongClickListener mOnIconLongClickListener = INSTANCE_ALL_APPS;
	protected OnFocusChangeListener mIconFocusListener;
	private final int mExtraHeight;

	public BaseAllAppsAdapter(T activityContext, LayoutInflater inflater,
	AlphabeticalAppsList<T> apps, BaseAdapterProvider[] adapterProviders) {
	Resources res = activityContext.getResources();
	mActivityContext = activityContext;
	mApps = apps;
	mLayoutInflater = inflater;

	mOnIconClickListener = mActivityContext.getItemOnClickListener();

	mAdapterProviders = adapterProviders;
	mExtraHeight = res.getDimensionPixelSize(R.dimen.all_apps_height_extra);
	}

	/**
	* Sets the long click listener for icons
	*/
	public void setOnIconLongClickListener(@Nullable OnLongClickListener listener) {
	mOnIconLongClickListener = listener;
	}

	/** Checks if the passed viewType represents all apps divider. */
	public static boolean isDividerViewType(int viewType) {
	return isViewType(viewType, VIEW_TYPE_MASK_DIVIDER);
	}

	/** Checks if the passed viewType represents all apps icon. */
	public static boolean isIconViewType(int viewType) {
	return isViewType(viewType, VIEW_TYPE_MASK_ICON);
	}

	public void setIconFocusListener(OnFocusChangeListener focusListener) {
	mIconFocusListener = focusListener;
	}

	/**
	* Returns the layout manager.
	*/
	public abstract RecyclerView.LayoutManager getLayoutManager();

	@Override
	public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
	switch (viewType) {
	case VIEW_TYPE_ICON:
	int layout = !FeatureFlags.ENABLE_TWOLINE_ALLAPPS.get() ? R.layout.all_apps_icon
	: R.layout.all_apps_icon_twoline;
	BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
	layout, parent, false);
	icon.setLongPressTimeoutFactor(1f);
	icon.setOnFocusChangeListener(mIconFocusListener);
	icon.setOnClickListener(mOnIconClickListener);
	icon.setOnLongClickListener(mOnIconLongClickListener);
	// Ensure the all apps icon height matches the workspace icons in portrait mode.
	icon.getLayoutParams().height =
	mActivityContext.getDeviceProfile().allAppsCellHeightPx;
	if (FeatureFlags.ENABLE_TWOLINE_ALLAPPS.get()) {
	icon.getLayoutParams().height += mExtraHeight;
	}
	return new ViewHolder(icon);
	case VIEW_TYPE_EMPTY_SEARCH:
	return new ViewHolder(mLayoutInflater.inflate(R.layout.all_apps_empty_search,
	parent, false));
	case VIEW_TYPE_ALL_APPS_DIVIDER:
	return new ViewHolder(mLayoutInflater.inflate(
	R.layout.all_apps_divider, parent, false));
	case VIEW_TYPE_WORK_EDU_CARD:
	return new ViewHolder(mLayoutInflater.inflate(
	R.layout.work_apps_edu, parent, false));
	case VIEW_TYPE_WORK_DISABLED_CARD:
	return new ViewHolder(mLayoutInflater.inflate(
	R.layout.work_apps_paused, parent, false));
	default:
	BaseAdapterProvider adapterProvider = getAdapterProvider(viewType);
	if (adapterProvider != null) {
	return adapterProvider.onCreateViewHolder(mLayoutInflater, parent, viewType);
	}
	throw new RuntimeException("Unexpected view type" + viewType);
	}
	}

	@Override
	public void onBindViewHolder(ViewHolder holder, int position) {
	switch (holder.getItemViewType()) {
	case VIEW_TYPE_ICON: {
	AdapterItem adapterItem = mApps.getAdapterItems().get(position);
	BubbleTextView icon = (BubbleTextView) holder.itemView;
	icon.reset();
	icon.applyFromApplicationInfo(adapterItem.itemInfo);
	break;
	}
	case VIEW_TYPE_EMPTY_SEARCH: {
	AppInfo info = mApps.getAdapterItems().get(position).itemInfo;
	if (info != null) {
	((TextView) holder.itemView).setText(mActivityContext.getString(
	R.string.all_apps_no_search_results, info.title));
	}
	break;
	}
	case VIEW_TYPE_ALL_APPS_DIVIDER:
	case VIEW_TYPE_WORK_DISABLED_CARD:
	// nothing to do
	break;
	case VIEW_TYPE_WORK_EDU_CARD:
	((WorkEduCard) holder.itemView).setPosition(position);
	break;
	default:
	BaseAdapterProvider adapterProvider = getAdapterProvider(holder.getItemViewType());
	if (adapterProvider != null) {
	adapterProvider.onBindView(holder, position);
	}
	}
	}

	@Override
	public void onViewRecycled(@NonNull ViewHolder holder) {
	super.onViewRecycled(holder);
	}

	@Override
	public boolean onFailedToRecycleView(ViewHolder holder) {
	// Always recycle and we will reset the view when it is bound
	return true;
	}

	@Override
	public int getItemCount() {
	return mApps.getAdapterItems().size();
	}

	@Override
	public int getItemViewType(int position) {
	AdapterItem item = mApps.getAdapterItems().get(position);
	return item.viewType;
	}

	protected static boolean isViewType(int viewType, int viewTypeMask) {
	return (viewType & viewTypeMask) != 0;
	}

	@Nullable
	protected BaseAdapterProvider getAdapterProvider(int viewType) {
	return Arrays.stream(mAdapterProviders).filter(
	adapterProvider -> adapterProvider.isViewSupported(viewType)).findFirst().orElse(
	null);
	}
	}