net.mograsim.plugin.core/src/net/mograsim/plugin/memory/MemoryTableContentProvider.java

   1 package net.mograsim.plugin.memory;
   2
   3 import org.eclipse.jface.viewers.ILazyContentProvider;
   4 import org.eclipse.jface.viewers.TableViewer;
   5 import org.eclipse.jface.viewers.Viewer;
   6
   7 import net.mograsim.machine.MainMemory;
   8
   9 public class MemoryTableContentProvider implements ILazyContentProvider
  10 {
  11         private long lower;
  12         private TableViewer viewer;
  13         private final static int limit = 10_000;
  14         private int amount = 0;
  15         private MainMemory memory;
  16
  17         public void setLowerBound(long lower)
  18         {
  19                 if (memory != null)
  20                         this.lower = Long.min(memory.getDefinition().getMaximalAddress(), Long.max(memory.getDefinition().getMinimalAddress(), lower));
  21                 else
  22                         this.lower = lower;
  23                 updateItemCount();
  24         }
  25
  26         public void updateItemCount()
  27         {
  28                 if (memory != null)
  29                 {
  30                         long size = memory.getDefinition().getMaximalAddress() - lower;
  31                         viewer.setItemCount(size > amount ? amount : (int) size);
  32                 } else
  33                         viewer.setItemCount(0);
  34         }
  35
  36         public long getLowerBound()
  37         {
  38                 return lower;
  39         }
  40
  41         public void setAmount(int amount)
  42         {
  43                 this.amount = Integer.min(amount, limit);
  44                 updateItemCount();
  45         }
  46
  47         public int getAmount()
  48         {
  49                 return amount;
  50         }
  51
  52         @Override
  53         public void updateElement(int index)
  54         {
  55                 long address = lower + index;
  56                 if (address <= memory.getDefinition().getMaximalAddress())
  57                         viewer.replace(new MemoryTableRow(address, memory), index);
  58         }
  59
  60         @Override
  61         public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
  62         {
  63                 this.viewer = (TableViewer) viewer;
  64                 this.memory = (MainMemory) newInput;
  65                 setLowerBound(0L);
  66         }
  67 }