| /* ==================================================================== |
| 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. |
| ==================================================================== */ |
| |
| package org.apache.poi.hssf.model; |
| |
| import org.apache.poi.ddf.EscherDgRecord; |
| import org.apache.poi.ddf.EscherDggRecord; |
| |
| import java.util.List; |
| import java.util.ArrayList; |
| |
| |
| /** |
| * Provides utilities to manage drawing groups. |
| * |
| * @author Glen Stampoultzis (glens at apache.org) |
| */ |
| public class DrawingManager2 |
| { |
| EscherDggRecord dgg; |
| List drawingGroups = new ArrayList( ); |
| |
| |
| public DrawingManager2( EscherDggRecord dgg ) |
| { |
| this.dgg = dgg; |
| } |
| |
| /** |
| * Clears the cached list of drawing groups |
| */ |
| public void clearDrawingGroups() { |
| drawingGroups.clear(); |
| } |
| |
| public EscherDgRecord createDgRecord() |
| { |
| EscherDgRecord dg = new EscherDgRecord(); |
| dg.setRecordId( EscherDgRecord.RECORD_ID ); |
| short dgId = findNewDrawingGroupId(); |
| dg.setOptions( (short) ( dgId << 4 ) ); |
| dg.setNumShapes( 0 ); |
| dg.setLastMSOSPID( -1 ); |
| drawingGroups.add(dg); |
| dgg.addCluster( dgId, 0 ); |
| dgg.setDrawingsSaved( dgg.getDrawingsSaved() + 1 ); |
| return dg; |
| } |
| |
| /** |
| * Allocates new shape id for the new drawing group id. |
| * |
| * @return a new shape id. |
| */ |
| public int allocateShapeId(short drawingGroupId) |
| { |
| EscherDgRecord dg = getDrawingGroup(drawingGroupId); |
| return allocateShapeId(drawingGroupId, dg); |
| } |
| |
| /** |
| * Allocates new shape id for the new drawing group id. |
| * |
| * @return a new shape id. |
| */ |
| public int allocateShapeId(short drawingGroupId, EscherDgRecord dg) |
| { |
| dgg.setNumShapesSaved( dgg.getNumShapesSaved() + 1 ); |
| |
| // Add to existing cluster if space available |
| for (int i = 0; i < dgg.getFileIdClusters().length; i++) |
| { |
| EscherDggRecord.FileIdCluster c = dgg.getFileIdClusters()[i]; |
| if (c.getDrawingGroupId() == drawingGroupId && c.getNumShapeIdsUsed() != 1024) |
| { |
| int result = c.getNumShapeIdsUsed() + (1024 * (i+1)); |
| c.incrementShapeId(); |
| dg.setNumShapes( dg.getNumShapes() + 1 ); |
| dg.setLastMSOSPID( result ); |
| if (result >= dgg.getShapeIdMax()) |
| dgg.setShapeIdMax( result + 1 ); |
| return result; |
| } |
| } |
| |
| // Create new cluster |
| dgg.addCluster( drawingGroupId, 0 ); |
| dgg.getFileIdClusters()[dgg.getFileIdClusters().length-1].incrementShapeId(); |
| dg.setNumShapes( dg.getNumShapes() + 1 ); |
| int result = (1024 * dgg.getFileIdClusters().length); |
| dg.setLastMSOSPID( result ); |
| if (result >= dgg.getShapeIdMax()) |
| dgg.setShapeIdMax( result + 1 ); |
| return result; |
| } |
| //////////// Non-public methods ///////////// |
| |
| /** |
| * Finds the next available (1 based) drawing group id |
| */ |
| short findNewDrawingGroupId() |
| { |
| short dgId = 1; |
| while ( drawingGroupExists( dgId ) ) |
| dgId++; |
| return dgId; |
| } |
| |
| EscherDgRecord getDrawingGroup(int drawingGroupId) |
| { |
| return (EscherDgRecord) drawingGroups.get(drawingGroupId-1); |
| } |
| |
| boolean drawingGroupExists( short dgId ) |
| { |
| for ( int i = 0; i < dgg.getFileIdClusters().length; i++ ) |
| { |
| if ( dgg.getFileIdClusters()[i].getDrawingGroupId() == dgId ) |
| return true; |
| } |
| return false; |
| } |
| |
| int findFreeSPIDBlock() |
| { |
| int max = dgg.getShapeIdMax(); |
| int next = ( ( max / 1024 ) + 1 ) * 1024; |
| return next; |
| } |
| |
| public EscherDggRecord getDgg() |
| { |
| return dgg; |
| } |
| |
| } |