package net.mograsim.plugin.memory;
-import org.eclipse.jface.viewers.IStructuredContentProvider;
+import org.eclipse.jface.viewers.ILazyContentProvider;
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.swt.widgets.Display;
import net.mograsim.machine.MainMemory;
+import net.mograsim.machine.MemoryObserver;
-public class MemoryTableContentProvider implements IStructuredContentProvider
+public class MemoryTableContentProvider implements ILazyContentProvider, MemoryObserver
{
private long lower;
- private int amount;
- public final static int limit = 128;
+ private TableViewer viewer;
+ private final static int limit = 10_000;
+ private int amount = 0;
+ private MainMemory memory;
- @Override
- public Object[] getElements(Object arg0)
+ public void setLowerBound(long lower)
{
- if (arg0 == null)
- return new Object[0];
- MainMemory memory = (MainMemory) arg0;
- lower = Long.max(lower, memory.getDefinition().getMinimalAddress());
- Object[] rows = new Object[amount];
- for (int i = 0; i < amount; i++)
- rows[i] = new MemoryTableRow(lower + i, memory);
- return rows;
+ if (memory != null)
+ this.lower = Long.min(memory.getDefinition().getMaximalAddress(), Long.max(memory.getDefinition().getMinimalAddress(), lower));
+ else
+ this.lower = lower;
+ updateItemCount();
}
- /**
- * Sets the bounds for the addresses in memory to be provided to the table.
- *
- * @param lower lower bound for address (inclusive)
- * @param amount amount of cells to show; limited to {@link MemoryTableContentProvider#limit}
- */
- public void setAddressRange(long lower, int amount)
+ public void updateItemCount()
{
- this.lower = lower;
- this.amount = Integer.min(Integer.max(amount, 0), limit);
+ if (memory != null)
+ {
+ long size = memory.getDefinition().getMaximalAddress() - lower;
+ viewer.setItemCount(size > amount ? amount : (int) size);
+ } else
+ viewer.setItemCount(0);
}
- public void setLowerBound(long lower)
+ public long getLowerBound()
{
- setAddressRange(lower, amount);
+ return lower;
}
public void setAmount(int amount)
{
- setAddressRange(lower, amount);
+ this.amount = Integer.min(amount, limit);
+ updateItemCount();
}
- public long getLowerBound()
+ public int getAmount()
{
- return lower;
+ return amount;
}
- public int getAmount()
+ @Override
+ public void updateElement(int index)
{
- return amount;
+ long address = lower + index;
+ if (address <= memory.getDefinition().getMaximalAddress())
+ viewer.replace(new MemoryTableRow(address, memory), index);
+ }
+
+ @Override
+ public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
+ {
+ this.viewer = (TableViewer) viewer;
+ this.memory = (MainMemory) newInput;
+ if (oldInput != null)
+ ((MainMemory) oldInput).deregisterObserver(this);
+ if (memory != null)
+ memory.registerObserver(this);
+ setLowerBound(0L);
+ }
+
+ @Override
+ public void update(long address)
+ {
+ Display.getDefault().asyncExec(() -> updateElement((int) (address - lower)));
}
}