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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OpenSim.Region.Framework.Scenes;
using OpenMetaverse;
using System.Drawing;
namespace OpenSim.Region.CoreModules.World.Archiver
{
/// <summary>
/// A group of regions arranged in a rectangle, possibly with holes.
/// </summary>
/// <remarks>
/// The regions usually (but not necessarily) belong to an archive file, in which case we
/// store additional information used to create the archive (e.g., each region's
/// directory within the archive).
/// </remarks>
public class ArchiveScenesGroup
{
/// <summary>
/// All the regions. The outer dictionary contains rows (key: Y coordinate).
/// The inner dictionaries contain each row's regions (key: X coordinate).
/// </summary>
public SortedDictionary<uint, SortedDictionary<uint, Scene>> Regions { get; set; }
/// <summary>
/// The subdirectory where each region is stored in the archive.
/// </summary>
protected Dictionary<UUID, string> m_regionDirs;
/// <summary>
/// The grid coordinates of the regions' bounding box.
/// </summary>
public Rectangle Rect { get; set; }
public ArchiveScenesGroup()
{
Regions = new SortedDictionary<uint, SortedDictionary<uint, Scene>>();
m_regionDirs = new Dictionary<UUID, string>();
Rect = new Rectangle(0, 0, 0, 0);
}
public void AddScene(Scene scene)
{
uint x = scene.RegionInfo.RegionLocX;
uint y = scene.RegionInfo.RegionLocY;
SortedDictionary<uint, Scene> row;
if (!Regions.TryGetValue(y, out row))
{
row = new SortedDictionary<uint, Scene>();
Regions[y] = row;
}
row[x] = scene;
}
/// <summary>
/// Called after all the scenes have been added. Performs calculations that require
/// knowledge of all the scenes.
/// </summary>
public void CalcSceneLocations()
{
if (Regions.Count == 0)
return;
// Find the bounding rectangle
uint firstY = Regions.First().Key;
uint lastY = Regions.Last().Key;
uint? firstX = null;
uint? lastX = null;
foreach (SortedDictionary<uint, Scene> row in Regions.Values)
{
uint curFirstX = row.First().Key;
uint curLastX = row.Last().Key;
firstX = (firstX == null) ? curFirstX : (firstX < curFirstX) ? firstX : curFirstX;
lastX = (lastX == null) ? curLastX : (lastX > curLastX) ? lastX : curLastX;
}
Rect = new Rectangle((int)firstX, (int)firstY, (int)(lastX - firstX + 1), (int)(lastY - firstY + 1));
// Calculate the subdirectory in which each region will be stored in the archive
m_regionDirs.Clear();
ForEachScene(delegate(Scene scene)
{
// We add the region's coordinates to ensure uniqueness even if multiple regions have the same name
string path = string.Format("{0}_{1}_{2}",
scene.RegionInfo.RegionLocX - Rect.X + 1,
scene.RegionInfo.RegionLocY - Rect.Y + 1,
scene.RegionInfo.RegionName.Replace(' ', '_'));
m_regionDirs[scene.RegionInfo.RegionID] = path;
});
}
/// <summary>
/// Returns the subdirectory where the region is stored.
/// </summary>
/// <param name="regionID"></param>
/// <returns></returns>
public string GetRegionDir(UUID regionID)
{
return m_regionDirs[regionID];
}
/// <summary>
/// Performs an action on all the scenes in this order: rows from South to North,
/// and within each row West to East.
/// </summary>
/// <param name="action"></param>
public void ForEachScene(Action<Scene> action)
{
foreach (SortedDictionary<uint, Scene> row in Regions.Values)
{
foreach (Scene scene in row.Values)
{
action(scene);
}
}
}
/// <summary>
/// Returns the scene at position 'location'.
/// </summary>
/// <param name="location">A location in the grid</param>
/// <param name="scene">The scene at this location</param>
/// <returns>Whether the scene was found</returns>
public bool TryGetScene(Point location, out Scene scene)
{
SortedDictionary<uint, Scene> row;
if (Regions.TryGetValue((uint)location.Y, out row))
{
if (row.TryGetValue((uint)location.X, out scene))
return true;
}
scene = null;
return false;
}
}
}
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