Define the list entry and view holder for the view all button

Child cl updates the adapter & picker to use this list entry type.

Bug: 356127021
Flag: com.android.launcher3.enable_tiered_widgets_by_default_in_picker
Test: Manual
Change-Id: I69e82fb7df24270dac4cc0afd003e98247280552

11 files changed, 221 insertions, 0 deletions

diff --git a/res/drawable/ic_more_horiz_24.xml b/res/drawable/ic_more_horiz_24.xml
new file mode 100644
index 0000000000..d46827cede
--- /dev/null
+++ b/res/drawable/ic_more_horiz_24.xml
@@ -0,0 +1,26 @@
+<!--
+  ~ Copyright (C) 2024 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.
+  -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#000000"
+    android:viewportHeight="24"
+    android:viewportWidth="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M6,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM18,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM12,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2z" />
+</vector>
diff --git a/res/drawable/widgets_list_expand_button_background.xml b/res/drawable/widgets_list_expand_button_background.xml
new file mode 100644
index 0000000000..068b26db43
--- /dev/null
+++ b/res/drawable/widgets_list_expand_button_background.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (C) 2024 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.
+  -->
+<inset xmlns:android="http://schemas.android.com/apk/res/android">
+    <ripple android:color="?android:attr/colorControlHighlight">
+        <item>
+            <shape android:shape="rectangle">
+                <corners android:radius="50dp" />
+                <solid android:color="?attr/widgetPickerExpandButtonBackgroundColor" />
+            </shape>
+        </item>
+    </ripple>
+</inset>
\ No newline at end of file
diff --git a/res/layout/widgets_list_expand_button.xml b/res/layout/widgets_list_expand_button.xml
new file mode 100644
index 0000000000..17c19ac677
--- /dev/null
+++ b/res/layout/widgets_list_expand_button.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (C) 2024 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.
+  -->
+
+<Button xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/Button.Rounded.Colored"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="@dimen/widgets_list_expand_button_top_margin"
+    android:background="@drawable/widgets_list_expand_button_background"
+    android:drawablePadding="@dimen/widgets_list_expand_button_drawable_padding"
+    android:drawableStart="@drawable/ic_more_horiz_24"
+    android:drawableTint="?attr/widgetPickerExpandButtonTextColor"
+    android:maxLines="1"
+    android:minHeight="48dp"
+    android:paddingEnd="@dimen/widgets_list_expand_button_end_padding"
+    android:paddingStart="@dimen/widgets_list_expand_button_start_padding"
+    android:paddingVertical="@dimen/widgets_list_expand_button_vertical_padding"
+    android:text="@string/widgets_list_expand_button_label"
+    android:contentDescription="@string/widgets_list_expand_button_content_description"
+    android:textColor="?attr/widgetPickerExpandButtonTextColor" />
\ No newline at end of file
diff --git a/res/values/attrs.xml b/res/values/attrs.xml
index 4dddb9a506..8a805c3023 100644
--- a/res/values/attrs.xml
+++ b/res/values/attrs.xml
@@ -126,6 +126,8 @@
     <attr name="widgetPickerCollapseHandleColor" format="color"/>
     <attr name="widgetPickerAddButtonBackgroundColor" format="color"/>
     <attr name="widgetPickerAddButtonTextColor" format="color"/>
+    <attr name="widgetPickerExpandButtonBackgroundColor" format="color"/>
+    <attr name="widgetPickerExpandButtonTextColor" format="color"/>
     <attr name="widgetCellTitleColor" format="color" />
     <attr name="widgetCellSubtitleColor" format="color" />
 
diff --git a/res/values/colors.xml b/res/values/colors.xml
index fa1626ea80..4549b869e4 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -117,6 +117,12 @@
     <color name="widget_picker_collapse_handle_color_light">#C4C7C5</color>
     <color name="widget_picker_add_button_background_color_light">#0B57D0</color>
     <color name="widget_picker_add_button_text_color_light">#0B57D0</color>
+    <color name="widget_picker_expand_button_background_color_light">
+        @color/widget_picker_secondary_surface_color_light
+    </color>
+    <color name="widget_picker_expand_button_text_color_light">
+        @color/widget_picker_header_app_title_color_light
+    </color>
     <color name="widget_cell_title_color_light">@color/system_on_surface_light</color>
     <color name="widget_cell_subtitle_color_light">@color/system_on_surface_variant_light</color>
 
@@ -138,6 +144,12 @@
     <color name="widget_picker_collapse_handle_color_dark">#444746</color>
     <color name="widget_picker_add_button_background_color_dark">#062E6F</color>
     <color name="widget_picker_add_button_text_color_dark">#FFFFFF</color>
+    <color name="widget_picker_expand_button_background_color_dark">
+        @color/widget_picker_secondary_surface_color_dark
+    </color>
+    <color name="widget_picker_expand_button_text_color_dark">
+        @color/widget_picker_header_app_title_color_dark
+    </color>
     <color name="widget_cell_title_color_dark">@color/system_on_surface_dark</color>
     <color name="widget_cell_subtitle_color_dark">@color/system_on_surface_variant_dark</color>
 
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index d4773c3c9f..d1dde3fe4a 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -230,6 +230,12 @@
 
     <dimen name="widget_list_top_bottom_corner_radius">28dp</dimen>
     <dimen name="widget_list_content_corner_radius">4dp</dimen>
+    <!-- Button that expands the widget apps list in the widget picker. -->
+    <dimen name="widgets_list_expand_button_drawable_padding">8dp</dimen>
+    <dimen name="widgets_list_expand_button_start_padding">16dp</dimen>
+    <dimen name="widgets_list_expand_button_end_padding">24dp</dimen>
+    <dimen name="widgets_list_expand_button_vertical_padding">16dp</dimen>
+    <dimen name="widgets_list_expand_button_top_margin">14dp</dimen>
 
     <dimen name="widget_list_header_view_vertical_padding">20dp</dimen>
     <dimen name="widget_list_entry_spacing">2dp</dimen>
diff --git a/res/values/id.xml b/res/values/id.xml
index 28496b5a19..67692d8fee 100644
--- a/res/values/id.xml
+++ b/res/values/id.xml
@@ -19,6 +19,7 @@
     <item type="id" name="view_type_widgets_space" />
     <item type="id" name="view_type_widgets_list" />
     <item type="id" name="view_type_widgets_header" />
+    <item type="id" name="view_type_widgets_list_expand" />
 
     <!-- Accessibility actions -->
     <item type="id" name="action_remove" />
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 746bd7eb74..f5af3393b2 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -157,6 +157,12 @@
     <!-- Accessibility content description for the button that adds a widget to the home screen. The
          placeholder text is the widget name. [CHAR_LIMIT=none] -->
     <string name="widget_add_button_content_description">Add <xliff:g id="widget_name" example="Calendar month view">%1$s</xliff:g> widget</string>
+    <!-- Text on the button that enables users to expand the widgets list to see all widget apps besides the default ones displayed. [CHAR_LIMIT=15] -->
+    <string name="widgets_list_expand_button_label">Show all</string>
+    <!-- Accessibility content description for the button that enables users to expand the widgets list to see all widget apps besides the default ones displayed. [CHAR_LIMIT=none]  -->
+    <string name="widgets_list_expand_button_content_description">Show all widgets</string>
+    <!-- Accessibility announcement to indicate to the users that widgets list is now expanded -->
+    <string name="widgets_list_expanded">Showing all widgets</string>
 
     <!-- Text on an educational tip on widget informing users that they can change widget settings.
          [CHAR_LIMIT=NONE] -->
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 728c523542..6d3579b1a9 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -275,6 +275,12 @@
             @color/widget_picker_add_button_background_color_light</item>
         <item name="widgetPickerAddButtonTextColor">
             @color/widget_picker_add_button_text_color_light</item>
+        <item name="widgetPickerExpandButtonBackgroundColor">
+            @color/widget_picker_expand_button_background_color_light
+        </item>
+        <item name="widgetPickerExpandButtonTextColor">
+            @color/widget_picker_expand_button_text_color_light
+        </item>
         <item name="widgetCellTitleColor">
             @color/widget_cell_title_color_light</item>
         <item name="widgetCellSubtitleColor">
@@ -316,6 +322,12 @@
             @color/widget_picker_add_button_background_color_dark</item>
         <item name="widgetPickerAddButtonTextColor">
             @color/widget_picker_add_button_text_color_dark</item>
+        <item name="widgetPickerExpandButtonBackgroundColor">
+            @color/widget_picker_expand_button_background_color_dark
+        </item>
+        <item name="widgetPickerExpandButtonTextColor">
+            @color/widget_picker_expand_button_text_color_dark
+        </item>
         <item name="widgetCellTitleColor">
             @color/widget_cell_title_color_dark</item>
         <item name="widgetCellSubtitleColor">
diff --git a/src/com/android/launcher3/widget/model/WidgetsListExpandActionEntry.java b/src/com/android/launcher3/widget/model/WidgetsListExpandActionEntry.java
new file mode 100644
index 0000000000..8c84030380
--- /dev/null
+++ b/src/com/android/launcher3/widget/model/WidgetsListExpandActionEntry.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2024 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.widget.model;
+
+import android.os.Process;
+
+import com.android.launcher3.model.data.PackageItemInfo;
+
+import java.util.Collections;
+
+/**
+ * Binds the section to be displayed at the bottom of the widgets list that enables user to expand
+ * and view all the widget apps including non-default. Bound when
+ * {@link WidgetsListExpandActionEntry} exists in the list on adapter.
+ */
+public class WidgetsListExpandActionEntry extends WidgetsListBaseEntry {
+
+    public WidgetsListExpandActionEntry() {
+        super(/*pkgItem=*/ new PackageItemInfo(/* packageName= */ "", Process.myUserHandle()),
+                /*titleSectionName=*/ "",
+                /*items=*/ Collections.EMPTY_LIST);
+        mPkgItem.title = "";
+    }
+}
diff --git a/src/com/android/launcher3/widget/picker/WidgetsListExpandActionViewHolderBinder.java b/src/com/android/launcher3/widget/picker/WidgetsListExpandActionViewHolderBinder.java
new file mode 100644
index 0000000000..288c4567f1
--- /dev/null
+++ b/src/com/android/launcher3/widget/picker/WidgetsListExpandActionViewHolderBinder.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2024 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.widget.picker;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.launcher3.R;
+import com.android.launcher3.recyclerview.ViewHolderBinder;
+import com.android.launcher3.widget.model.WidgetsListExpandActionEntry;
+
+import java.util.List;
+
+/**
+ * Creates and populates views for the {@link WidgetsListExpandActionEntry}.
+ */
+public class WidgetsListExpandActionViewHolderBinder implements
+        ViewHolderBinder<WidgetsListExpandActionEntry, RecyclerView.ViewHolder> {
+    @NonNull
+    View.OnClickListener mExpandListClickListener;
+    private final LayoutInflater mLayoutInflater;
+
+    public WidgetsListExpandActionViewHolderBinder(
+            @NonNull LayoutInflater layoutInflater,
+            @NonNull View.OnClickListener expandListClickListener) {
+        mLayoutInflater = layoutInflater;
+        mExpandListClickListener = expandListClickListener;
+    }
+
+    @Override
+    public RecyclerView.ViewHolder newViewHolder(ViewGroup parent) {
+        return new RecyclerView.ViewHolder(mLayoutInflater.inflate(
+                R.layout.widgets_list_expand_button, parent, false)) {
+        };
+    }
+
+    @Override
+    public void bindViewHolder(RecyclerView.ViewHolder viewHolder,
+            WidgetsListExpandActionEntry data, int position, List<Object> payloads) {
+        viewHolder.itemView.setOnClickListener(mExpandListClickListener);
+    }
+}