public void Combine(MapExtent extent)
{
if (extent == MapExtent.None)
{
return;
}
if (this == MapExtent.None)
{
this.left = extent.left;
this.right = extent.right;
this.top = extent.top;
this.bottom = extent.bottom;
}
else
{
if (this.left > extent.left)
{
this.left = extent.left;
}
if (this.right < extent.right)
{
this.right = extent.right;
}
if (this.top < extent.top)
{
this.top = extent.top;
}
if (this.bottom > extent.bottom)
{
this.bottom = extent.bottom;
}
}
}
internal bool DoParserIdAndExtent(XmlNode dataNode, out int id, out List <MapPoint> points)
{
string strextent;
points = new List <MapPoint>();
if (DoParserIdAndExtent(dataNode, out id, out strextent))
{
string[] strs = strextent.Split(';');
foreach (string item in strs)
{
if (String.IsNullOrWhiteSpace(item))
{
continue;
}
MapExtent?me = MapExtent.FromString(item);
if (me == null)
{
continue;
}
MapPoint mp = ((MapExtent)me).LeftTop;
points.Add(mp);
}
}
return(points.Count != 0);
}
public override bool Equals(object obj)
{
if (!(obj is MapExtent))
{
return(false);
}
MapExtent extent = (MapExtent)obj;
return(extent == this);
}
public bool IsIntersectWith(MapExtent extent)
{
if (Math.Abs(this.Center.x - extent.Center.x) <= this.Width / 2 + extent.Width / 2 && Math.Abs(this.Center.y - extent.Center.y) <= this.Height / 2 + extent.Height / 2)
{
return(true);
}
else
{
return(false);
}
}
public override List <Datarow> Query(string tableName, MapExtent extent)
{
string lsdtfile = System.IO.Path.Combine(_datasourcePath, tableName + ".lsdt");
XmlDocument document = new XmlDocument();
document.Load(lsdtfile);
XmlNodeList nodelist = document.SelectNodes("datas/data");
if (nodelist != null && nodelist.Count > 0)
{
return(DoQueryFileTableData(nodelist, tableName, extent));
}
return(new List <Datarow>());
}
public static MapExtent?FromPoints(List <MapPoint> points)
{
if (points == null || points.Count == 0)
{
return(null);
}
MapExtent me = FromPoint(points[0]);
for (int i = 1; i < points.Count; i++)
{
me.Combine(points[i]);
}
return(me);
}
public override MapExtent QueryExtent(string tableName)
{
List <Datarow> rows = Query(tableName, MapExtent.Max);
if (rows.Count > 0)
{
MapExtent extent = rows[0].Extent;
for (int i = 1; i < rows.Count; i++)
{
extent.Combine(rows[i].Extent);
}
return(extent);
}
return(MapExtent.None);
}
internal bool DoParserIdAndExtent(XmlNode dataNode, out int id, out MapExtent extent)
{
string strextent;
extent = MapExtent.Empty;
if (DoParserIdAndExtent(dataNode, out id, out strextent))
{
MapExtent?me = MapExtent.FromString(strextent);
if (me == null)
{
return(false);
}
extent = (MapExtent)me;
return(true);
}
return(false);
}
internal List <Datarow> DoParserLineData(XmlNodeList nodelist, string tableName, MapExtent extent)
{
List <Datarow> rows = new List <Datarow>();
foreach (XmlNode node in nodelist)
{
int id;
List <MapPoint> points;
if (!DoParserIdAndExtent(node, out id, out points))
{
continue;
}
MapLine mapLine = new MapLine();
mapLine.Points = points;
if (mapLine.Extent.IsIntersectWith(extent))
{
Datarow datarow = new Datarow(mapLine, mapLine.Extent);
rows.Add(datarow);
}
}
return(rows);
}
internal List <Datarow> DoParserRasterData(XmlNodeList nodelist, string tableName, MapExtent extent)
{
List <Datarow> rows = new List <Datarow>();
string ddPath = System.IO.Path.Combine(_datasourcePath, tableName + ".lsdd");
foreach (XmlNode node in nodelist)
{
int id;
MapExtent textent;
if (!DoParserIdAndExtent(node, out id, out textent))
{
continue;
}
if (textent.IsIntersectWith(extent))
{
string fileddPath = ddPath + id;
Datarow datarow = new Datarow(fileddPath, textent);
rows.Add(datarow);
}
}
return(rows);
}
internal List <Datarow> DoParserPointData(XmlNodeList nodelist, string tableName, MapExtent extent)
{
List <Datarow> rows = new List <Datarow>();
foreach (XmlNode node in nodelist)
{
int id;
MapExtent textent;
if (!DoParserIdAndExtent(node, out id, out textent))
{
continue;
}
if (textent.IsIntersectWith(extent))
{
Datarow datarow = new Datarow(textent.LeftTop, textent);
rows.Add(datarow);
}
}
return(rows);
}
public Datarow(object data, MapExtent extent)
{
_data = data;
_extent = extent;
}
static MapExtent()
{
Empty = new MapExtent(0, 0, 0, 0);
Max = new MapExtent(double.MinValue, double.MaxValue, double.MaxValue, double.MinValue);
None = new MapExtent(double.MinValue, double.MinValue, double.MinValue, double.MinValue);
}
public void Combine(MapPoint point)
{
MapExtent ex = MapExtent.FromPoint(point);
Combine(ex);
}
internal List <Datarow> DoQueryFileTableData(XmlNodeList nodelist, string tableName, MapExtent extent)
{
Datatable table = GetDatatable(tableName);
if (table != null)
{
switch (table.TableType)
{
case DatatableType.Null:
break;
case DatatableType.Point:
return(DoParserPointData(nodelist, tableName, extent));
case DatatableType.Raster:
return(DoParserRasterData(nodelist, tableName, extent));
case DatatableType.Line:
return(DoParserLineData(nodelist, tableName, extent));
case DatatableType.Polygon:
return(DoParserPolygonData(nodelist, tableName, extent));
default:
break;
}
}
return(new List <Datarow>());
}
public abstract List <Datarow> Query(string tableName, MapExtent extent);
public List <Datarow> Query(MapExtent extent)
{
return(_datasource.Query(_tableName, extent));
}
