/* ====================================================================
|
Licensed to the Apache Software Foundation (ASF) Under one or more
|
contributor license agreements. See the NOTICE file distributed with
|
this work for Additional information regarding copyright ownership.
|
The ASF licenses this file to You 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.
|
==================================================================== */
|
|
namespace HH.WMS.Utils.NPOI.HSSF.Model
|
{
|
using System;
|
using HH.WMS.Utils.NPOI.DDF;
|
using System.Collections;
|
|
|
/**
|
* Provides utilities to manage drawing Groups.
|
*
|
* @author Glen Stampoultzis (glens at apache.org)
|
*/
|
public class DrawingManager
|
{
|
EscherDggRecord dgg;
|
Hashtable dgMap = new Hashtable(); // key = Short(drawingId), value=EscherDgRecord
|
|
public DrawingManager(EscherDggRecord dgg)
|
{
|
this.dgg = dgg;
|
}
|
|
public EscherDgRecord CreateDgRecord()
|
{
|
EscherDgRecord dg = new EscherDgRecord();
|
dg.RecordId=(EscherDgRecord.RECORD_ID);
|
short dgId = FindNewDrawingGroupId();
|
dg.Options=((short)(dgId << 4));
|
dg.NumShapes=(0);
|
dg.LastMSOSPID=(-1);
|
dgg.AddCluster(dgId, 0);
|
dgg.DrawingsSaved=(dgg.DrawingsSaved + 1);
|
dgMap[dgId]= dg;
|
return dg;
|
}
|
|
/**
|
* Allocates new shape id for the new drawing Group id.
|
*
|
* @return a new shape id.
|
*/
|
|
public int AllocateShapeId(short drawingGroupId)
|
{
|
// Get the last shape id for this drawing Group.
|
EscherDgRecord dg = (EscherDgRecord)dgMap[drawingGroupId];
|
int lastShapeId = dg.LastMSOSPID;
|
|
|
// Have we run out of shapes for this cluster?
|
int newShapeId = 0;
|
if (lastShapeId % 1024 == 1023)
|
{
|
// Yes:
|
// Find the starting shape id of the next free cluster
|
newShapeId = FindFreeSPIDBlock();
|
// Create a new cluster in the dgg record.
|
dgg.AddCluster(drawingGroupId, 1);
|
}
|
else
|
{
|
// No:
|
// Find the cluster for this drawing Group with free space.
|
for (int i = 0; i < dgg.FileIdClusters.Length; i++)
|
{
|
EscherDggRecord.FileIdCluster c = dgg.FileIdClusters[i];
|
if (c.DrawingGroupId == drawingGroupId)
|
{
|
if (c.NumShapeIdsUsed != 1024)
|
{
|
// Increment the number of shapes used for this cluster.
|
c.IncrementShapeId();
|
}
|
}
|
// If the last shape id = -1 then we know to Find a free block;
|
if (dg.LastMSOSPID == -1)
|
{
|
newShapeId = FindFreeSPIDBlock();
|
}
|
else
|
{
|
// The new shape id to be the last shapeid of this cluster + 1
|
newShapeId = dg.LastMSOSPID + 1;
|
}
|
}
|
}
|
// Increment the total number of shapes used in the dgg.
|
dgg.NumShapesSaved=(dgg.NumShapesSaved + 1);
|
// Is the new shape id >= max shape id for dgg?
|
if (newShapeId >= dgg.ShapeIdMax)
|
{
|
// Yes:
|
// Set the max shape id = new shape id + 1
|
dgg.ShapeIdMax=newShapeId + 1;
|
}
|
// Set last shape id for this drawing Group.
|
dg.LastMSOSPID=newShapeId;
|
// Increased the number of shapes used for this drawing Group.
|
dg.IncrementShapeCount();
|
|
|
return newShapeId;
|
}
|
|
|
public short FindNewDrawingGroupId()
|
{
|
short dgId = 1;
|
while (DrawingGroupExists(dgId))
|
dgId++;
|
return dgId;
|
}
|
|
public bool DrawingGroupExists(short dgId)
|
{
|
for (int i = 0; i < dgg.FileIdClusters.Length; i++)
|
{
|
if (dgg.FileIdClusters[i].DrawingGroupId == dgId)
|
return true;
|
}
|
return false;
|
}
|
|
public int FindFreeSPIDBlock()
|
{
|
int max = dgg.ShapeIdMax;
|
int next = ((max / 1024) + 1) * 1024;
|
return next;
|
}
|
|
public EscherDggRecord Dgg
|
{
|
get
|
{
|
return dgg;
|
}
|
}
|
|
}
|
}
|
