| /* |
| * Copyright (C) 2019 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 android.service.controls; |
| |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| import com.android.internal.util.Preconditions; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| /** |
| * An abstract input template for a {@link Control}. |
| * |
| * Specifies what layout is presented to the user when a {@link ControlState} is assigned to a |
| * particular {@link Control}. |
| * <p> |
| * Some instances of {@link Control} can originate actions (via user interaction) to modify its |
| * associated state. The actions available to a given {@link Control} in a particular |
| * {@link ControlState} are determined by its {@link ControlTemplate}. |
| * @see ControlAction |
| * @hide |
| */ |
| public abstract class ControlTemplate implements Parcelable { |
| |
| /** |
| * Singleton representing a {@link Control} with no input. |
| */ |
| public static final ControlTemplate NO_TEMPLATE = new ControlTemplate("") { |
| @Override |
| public int getTemplateType() { |
| return TYPE_NONE; |
| } |
| }; |
| |
| /** |
| * @hide |
| */ |
| @Retention(RetentionPolicy.SOURCE) |
| @IntDef({ |
| TYPE_NONE, |
| TYPE_TOGGLE, |
| TYPE_RANGE, |
| TYPE_THUMBNAIL, |
| TYPE_DISCRETE_TOGGLE, |
| TYPE_COORD_RANGE |
| }) |
| public @interface TemplateType {} |
| |
| /** |
| * Type identifier of {@link ControlTemplate#NO_TEMPLATE}. |
| */ |
| public static final int TYPE_NONE = 0; |
| |
| /** |
| * Type identifier of {@link ToggleTemplate}. |
| */ |
| public static final int TYPE_TOGGLE = 1; |
| |
| /** |
| * Type identifier of {@link RangeTemplate}. |
| */ |
| public static final int TYPE_RANGE = 2; |
| |
| /** |
| * Type identifier of {@link ThumbnailTemplate}. |
| */ |
| public static final int TYPE_THUMBNAIL = 3; |
| |
| /** |
| * Type identifier of {@link DiscreteToggleTemplate}. |
| */ |
| public static final int TYPE_DISCRETE_TOGGLE = 4; |
| |
| /** |
| * @hide |
| */ |
| public static final int TYPE_COORD_RANGE = 5; |
| |
| private @NonNull final String mTemplateId; |
| |
| /** |
| * @return the identifier for this object. |
| */ |
| public String getTemplateId() { |
| return mTemplateId; |
| } |
| |
| /** |
| * The {@link TemplateType} associated with this class. |
| */ |
| public abstract @TemplateType int getTemplateType(); |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| dest.writeInt(getTemplateType()); |
| dest.writeString(mTemplateId); |
| } |
| |
| private ControlTemplate() { |
| mTemplateId = ""; |
| } |
| |
| ControlTemplate(Parcel in) { |
| mTemplateId = in.readString(); |
| } |
| |
| /** |
| * @hide |
| */ |
| ControlTemplate(@NonNull String templateId) { |
| Preconditions.checkNotNull(templateId); |
| mTemplateId = templateId; |
| } |
| |
| public static final Creator<ControlTemplate> CREATOR = new Creator<ControlTemplate>() { |
| @Override |
| public ControlTemplate createFromParcel(Parcel source) { |
| int type = source.readInt(); |
| return createTemplateFromType(type, source); |
| } |
| |
| @Override |
| public ControlTemplate[] newArray(int size) { |
| return new ControlTemplate[size]; |
| } |
| }; |
| |
| private static ControlTemplate createTemplateFromType(@TemplateType int type, Parcel source) { |
| switch(type) { |
| case TYPE_TOGGLE: |
| return ToggleTemplate.CREATOR.createFromParcel(source); |
| case TYPE_RANGE: |
| return RangeTemplate.CREATOR.createFromParcel(source); |
| case TYPE_THUMBNAIL: |
| return ThumbnailTemplate.CREATOR.createFromParcel(source); |
| case TYPE_DISCRETE_TOGGLE: |
| return DiscreteToggleTemplate.CREATOR.createFromParcel(source); |
| case TYPE_NONE: |
| return NO_TEMPLATE; |
| default: |
| return null; |
| } |
| } |
| } |