src/com/android/launcher3/ItemInfo.java

/*
 * Copyright (C) 2008 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;

import android.content.ComponentName;
import android.content.ContentValues;
import android.content.Intent;
import android.os.Process;
import android.os.UserHandle;

import com.android.launcher3.util.ContentWriter;

/**
 * Represents an item in the launcher.
 */
public class ItemInfo {

    public static final int NO_ID = -1;

    /**
     * The id in the settings database for this item
     */
    public long id = NO_ID;

    /**
     * One of {@link LauncherSettings.Favorites#ITEM_TYPE_APPLICATION},
     * {@link LauncherSettings.Favorites#ITEM_TYPE_SHORTCUT},
     * {@link LauncherSettings.Favorites#ITEM_TYPE_FOLDER}, or
     * {@link LauncherSettings.Favorites#ITEM_TYPE_APPWIDGET}.
     */
    public int itemType;

    /**
     * The id of the container that holds this item. For the desktop, this will be
     * {@link LauncherSettings.Favorites#CONTAINER_DESKTOP}. For the all applications folder it
     * will be {@link #NO_ID} (since it is not stored in the settings DB). For user folders
     * it will be the id of the folder.
     */
    public long container = NO_ID;

    /**
     * Indicates the screen in which the shortcut appears.
     */
    public long screenId = -1;

    /**
     * Indicates the X position of the associated cell.
     */
    public int cellX = -1;

    /**
     * Indicates the Y position of the associated cell.
     */
    public int cellY = -1;

    /**
     * Indicates the X cell span.
     */
    public int spanX = 1;

    /**
     * Indicates the Y cell span.
     */
    public int spanY = 1;

    /**
     * Indicates the minimum X cell span.
     */
    public int minSpanX = 1;

    /**
     * Indicates the minimum Y cell span.
     */
    public int minSpanY = 1;

    /**
     * Indicates the position in an ordered list.
     */
    public int rank = 0;

    /**
     * Title of the item
     */
    public CharSequence title;

    /**
     * Content description of the item.
     */
    public CharSequence contentDescription;

    public UserHandle user;

    public ItemInfo() {
        user = Process.myUserHandle();
    }

    ItemInfo(ItemInfo info) {
        copyFrom(info);
        // tempdebug:
        LauncherModel.checkItemInfo(this);
    }

    public void copyFrom(ItemInfo info) {
        id = info.id;
        cellX = info.cellX;
        cellY = info.cellY;
        spanX = info.spanX;
        spanY = info.spanY;
        rank = info.rank;
        screenId = info.screenId;
        itemType = info.itemType;
        container = info.container;
        user = info.user;
        contentDescription = info.contentDescription;
    }

    public Intent getIntent() {
        return null;
    }

    public ComponentName getTargetComponent() {
        return getIntent() == null ? null : getIntent().getComponent();
    }

    public void writeToValues(ContentWriter writer) {
        writer.put(LauncherSettings.Favorites.ITEM_TYPE, itemType)
                .put(LauncherSettings.Favorites.CONTAINER, container)
                .put(LauncherSettings.Favorites.SCREEN, screenId)
                .put(LauncherSettings.Favorites.CELLX, cellX)
                .put(LauncherSettings.Favorites.CELLY, cellY)
                .put(LauncherSettings.Favorites.SPANX, spanX)
                .put(LauncherSettings.Favorites.SPANY, spanY)
                .put(LauncherSettings.Favorites.RANK, rank);
    }

    public void readFromValues(ContentValues values) {
        itemType = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
        container = values.getAsLong(LauncherSettings.Favorites.CONTAINER);
        screenId = values.getAsLong(LauncherSettings.Favorites.SCREEN);
        cellX = values.getAsInteger(LauncherSettings.Favorites.CELLX);
        cellY = values.getAsInteger(LauncherSettings.Favorites.CELLY);
        spanX = values.getAsInteger(LauncherSettings.Favorites.SPANX);
        spanY = values.getAsInteger(LauncherSettings.Favorites.SPANY);
        rank = values.getAsInteger(LauncherSettings.Favorites.RANK);
    }

    /**
     * Write the fields of this item to the DB
     */
    public void onAddToDatabase(ContentWriter writer) {
        if (screenId == Workspace.EXTRA_EMPTY_SCREEN_ID) {
            // We should never persist an item on the extra empty screen.
            throw new RuntimeException("Screen id should not be EXTRA_EMPTY_SCREEN_ID");
        }

        writeToValues(writer);
        writer.put(LauncherSettings.Favorites.PROFILE_ID, user);
    }

    @Override
    public final String toString() {
        return getClass().getSimpleName() + "(" + dumpProperties() + ")";
    }

    protected String dumpProperties() {
        return "id=" + id
                + " type=" + itemType
                + " container=" + container
                + " screen=" + screenId
                + " cellX=" + cellX
                + " cellY=" + cellY
                + " spanX=" + spanX
                + " spanY=" + spanY
                + " minSpanX=" + minSpanX
                + " minSpanY=" + minSpanY
                + " rank=" + rank
                + " user=" + user
                + " title=" + title;
    }

    /**
     * Whether this item is disabled.
     */
    public boolean isDisabled() {
        return false;
    }
}