Search support for widgets with config activity

Shows widget preview in search if widget requires config.

preview: https://drive.google.com/file/d/1q1ROu7-OUGfskDMRxXPNQMdr3T-WMMkv/view?usp=sharing
Bug: 168321831
Test: Manual
Change-Id: I6c1c168ebac4ce33a4234e8a417eba789f664f43

res/layout/search_result_widget_preview.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.android.launcher3.views.SearchResultWidgetPreview xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:padding="@dimen/dynamic_grid_cell_padding_x"
+    android:layout_height="wrap_content">
+    <include layout="@layout/widget_cell" android:id="@+id/widget_cell"/>
+<!--    <include layout="@layout/widget_cell_content" />-->
+</com.android.launcher3.views.SearchResultWidgetPreview>

src/com/android/launcher3/allapps/AllAppsGridAdapter.java

@@ -92,6 +92,8 @@ public class AllAppsGridAdapter extends
 
     public static final int VIEW_TYPE_SEARCH_WIDGET_LIVE = 1 << 15;
 
+    public static final int VIEW_TYPE_SEARCH_WIDGET_PREVIEW = 1 << 16;
+
     // 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 | VIEW_TYPE_SEARCH_ICON;
@@ -287,7 +289,8 @@ public class AllAppsGridAdapter extends
             int viewType = mApps.getAdapterItems().get(position).viewType;
             if (isIconViewType(viewType)) {
                 return 1 * SPAN_MULTIPLIER;
-            } else if (viewType == VIEW_TYPE_SEARCH_THUMBNAIL) {
+            } else if (viewType == VIEW_TYPE_SEARCH_THUMBNAIL
+                    || viewType == VIEW_TYPE_SEARCH_WIDGET_PREVIEW) {
                 return mAppsPerRow;
             } else {
                 // Section breaks span the full width
@@ -433,6 +436,9 @@ public class AllAppsGridAdapter extends
             case VIEW_TYPE_SEARCH_WIDGET_LIVE:
                 return new ViewHolder(mLayoutInflater.inflate(
                         R.layout.search_result_widget_live, parent, false));
+            case VIEW_TYPE_SEARCH_WIDGET_PREVIEW:
+                return new ViewHolder(mLayoutInflater.inflate(
+                        R.layout.search_result_widget_preview, parent, false));
             default:
                 throw new RuntimeException("Unexpected view type");
         }
@@ -476,6 +482,7 @@ public class AllAppsGridAdapter extends
             case VIEW_TYPE_SEARCH_THUMBNAIL:
             case VIEW_TYPE_SEARCH_SUGGEST:
             case VIEW_TYPE_SEARCH_WIDGET_LIVE:
+            case VIEW_TYPE_SEARCH_WIDGET_PREVIEW:
                 SearchAdapterItem item =
                         (SearchAdapterItem) mApps.getAdapterItems().get(position);
                 SearchTargetHandler payloadResultView = (SearchTargetHandler) holder.itemView;

src/com/android/launcher3/views/SearchResultWidgetPreview.java

@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2020 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.views;
+
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.Context;
+import android.graphics.Point;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.Toast;
+
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.LauncherAppWidgetProviderInfo;
+import com.android.launcher3.R;
+import com.android.launcher3.allapps.search.AllAppsSearchBarController;
+import com.android.launcher3.allapps.search.SearchEventTracker;
+import com.android.launcher3.dragndrop.DragOptions;
+import com.android.launcher3.model.WidgetItem;
+import com.android.launcher3.touch.ItemLongClickListener;
+import com.android.launcher3.widget.BaseWidgetSheet;
+import com.android.launcher3.widget.PendingItemDragHelper;
+import com.android.launcher3.widget.WidgetCell;
+import com.android.launcher3.widget.WidgetImageView;
+import com.android.systemui.plugins.shared.SearchTarget;
+import com.android.systemui.plugins.shared.SearchTargetEvent;
+
+/**
+ * displays preview of a widget upon receiving {@link AppWidgetProviderInfo} from Search provider
+ */
+public class SearchResultWidgetPreview extends LinearLayout implements
+        AllAppsSearchBarController.SearchTargetHandler, View.OnLongClickListener,
+        View.OnClickListener {
+
+    public static final String TARGET_TYPE_WIDGET_PREVIEW = "widget_preview";
+    private final Launcher mLauncher;
+    private final LauncherAppState mAppState;
+    private WidgetCell mWidgetCell;
+    private Toast mWidgetToast;
+
+    private SearchTarget mSearchTarget;
+
+
+    public SearchResultWidgetPreview(Context context) {
+        this(context, null, 0);
+    }
+
+    public SearchResultWidgetPreview(Context context,
+            @Nullable AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public SearchResultWidgetPreview(Context context, @Nullable AttributeSet attrs,
+            int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mLauncher = Launcher.getLauncher(context);
+        mAppState = LauncherAppState.getInstance(context);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mWidgetCell = findViewById(R.id.widget_cell);
+        mWidgetCell.setOnLongClickListener(this);
+        mWidgetCell.setOnClickListener(this);
+    }
+
+    @Override
+    public void applySearchTarget(SearchTarget searchTarget) {
+        if (searchTarget.getExtras() == null
+                || searchTarget.getExtras().getParcelable("provider") == null) {
+            setVisibility(GONE);
+            return;
+        }
+        mSearchTarget = searchTarget;
+        AppWidgetProviderInfo providerInfo = searchTarget.getExtras().getParcelable("provider");
+        LauncherAppWidgetProviderInfo pInfo = LauncherAppWidgetProviderInfo.fromProviderInfo(
+                getContext(), providerInfo);
+        MODEL_EXECUTOR.post(() -> {
+            WidgetItem widgetItem = new WidgetItem(pInfo, mLauncher.getDeviceProfile().inv,
+                    mAppState.getIconCache());
+            MAIN_EXECUTOR.post(() -> {
+                mWidgetCell.applyFromCellItem(widgetItem, mAppState.getWidgetCache());
+                mWidgetCell.ensurePreview();
+            });
+        });
+
+    }
+
+    @Override
+    public boolean onLongClick(View view) {
+        view.cancelLongPress();
+        if (!ItemLongClickListener.canStartDrag(mLauncher)) return false;
+        if (mWidgetCell.getTag() == null) return false;
+
+        WidgetImageView imageView = mWidgetCell.getWidgetView();
+        if (imageView.getBitmap() == null) {
+            return false;
+        }
+
+        int[] loc = new int[2];
+        mLauncher.getDragLayer().getLocationInDragLayer(imageView, loc);
+
+        new PendingItemDragHelper(mWidgetCell).startDrag(
+                imageView.getBitmapBounds(), imageView.getBitmap().getWidth(), imageView.getWidth(),
+                new Point(loc[0], loc[1]), mLauncher.getAppsView(), new DragOptions());
+        handleSelection(SearchTargetEvent.LONG_PRESS);
+        return true;
+    }
+
+    @Override
+    public void onClick(View view) {
+        mWidgetToast = BaseWidgetSheet.showWidgetToast(getContext(), mWidgetToast);
+        handleSelection(SearchTargetEvent.SELECT);
+    }
+
+    @Override
+    public void handleSelection(int eventType) {
+        SearchEventTracker.INSTANCE.get(getContext()).notifySearchTargetEvent(
+                new SearchTargetEvent.Builder(mSearchTarget, eventType).build());
+    }
+}

src/com/android/launcher3/widget/BaseWidgetSheet.java

@@ -42,7 +42,7 @@ import com.android.launcher3.views.AbstractSlideInView;
 /**
  * Base class for various widgets popup
  */
-abstract class BaseWidgetSheet extends AbstractSlideInView
+public abstract class BaseWidgetSheet extends AbstractSlideInView
         implements OnClickListener, OnLongClickListener, DragSource,
         PopupDataProvider.PopupDataChangeListener {
 
@@ -74,16 +74,7 @@ abstract class BaseWidgetSheet extends AbstractSlideInView
 
     @Override
     public final void onClick(View v) {
-        // Let the user know that they have to long press to add a widget
-        if (mWidgetInstructionToast != null) {
-            mWidgetInstructionToast.cancel();
-        }
-
-        CharSequence msg = Utilities.wrapForTts(
-                getContext().getText(R.string.long_press_widget_to_add),
-                getContext().getString(R.string.long_accessible_way_to_add));
-        mWidgetInstructionToast = Toast.makeText(getContext(), msg, Toast.LENGTH_SHORT);
-        mWidgetInstructionToast.show();
+        mWidgetInstructionToast = showWidgetToast(getContext(), mWidgetInstructionToast);
     }
 
     @Override
@@ -146,4 +137,21 @@ abstract class BaseWidgetSheet extends AbstractSlideInView
     protected SystemUiController getSystemUiController() {
         return mLauncher.getSystemUiController();
     }
+
+    /**
+     * Show Widget tap toast prompting user to drag instead
+     */
+    public static Toast showWidgetToast(Context context, Toast toast) {
+        // Let the user know that they have to long press to add a widget
+        if (toast != null) {
+            toast.cancel();
+        }
+
+        CharSequence msg = Utilities.wrapForTts(
+                context.getText(R.string.long_press_widget_to_add),
+                context.getString(R.string.long_accessible_way_to_add));
+        toast = Toast.makeText(context, msg, Toast.LENGTH_SHORT);
+        toast.show();
+        return toast;
+    }
 }