/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.logisim.circuit;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import com.cburch.logisim.comp.Component;
import com.cburch.logisim.data.Attribute;
import com.cburch.logisim.data.AttributeSet;
class CircuitMutatorImpl implements CircuitMutator {
private ArrayList<CircuitChange> log;
private HashMap<Circuit,ReplacementMap> replacements;
private HashSet<Circuit> modified;
public CircuitMutatorImpl() {
log = new ArrayList<CircuitChange>();
replacements = new HashMap<Circuit,ReplacementMap>();
modified = new HashSet<Circuit>();
}
public void clear(Circuit circuit) {
HashSet<Component> comps = new HashSet<Component>(circuit.getNonWires());
comps.addAll(circuit.getWires());
if (!comps.isEmpty()) modified.add(circuit);
log.add(CircuitChange.clear(circuit, comps));
ReplacementMap repl = new ReplacementMap();
for (Component comp : comps) repl.remove(comp);
getMap(circuit).append(repl);
circuit.mutatorClear();
}
public void add(Circuit circuit, Component comp) {
modified.add(circuit);
log.add(CircuitChange.add(circuit, comp));
ReplacementMap repl = new ReplacementMap();
repl.add(comp);
getMap(circuit).append(repl);
circuit.mutatorAdd(comp);
}
public void remove(Circuit circuit, Component comp) {
if (circuit.contains(comp)) {
modified.add(circuit);
log.add(CircuitChange.remove(circuit, comp));
ReplacementMap repl = new ReplacementMap();
repl.remove(comp);
getMap(circuit).append(repl);
circuit.mutatorRemove(comp);
}
}
public void replace(Circuit circuit, Component prev, Component next) {
replace(circuit, new ReplacementMap(prev, next));
}
public void replace(Circuit circuit, ReplacementMap repl) {
if (!repl.isEmpty()) {
modified.add(circuit);
log.add(CircuitChange.replace(circuit, repl));
repl.freeze();
getMap(circuit).append(repl);
for (Component c : repl.getRemovals()) {
circuit.mutatorRemove(c);
}
for (Component c : repl.getAdditions()) {
circuit.mutatorAdd(c);
}
}
}
public void set(Circuit circuit, Component comp, Attribute<?> attr,
Object newValue) {
if (circuit.contains(comp)) {
modified.add(circuit);
@SuppressWarnings("unchecked")
Attribute<Object> a = (Attribute<Object>) attr;
AttributeSet attrs = comp.getAttributeSet();
Object oldValue = attrs.getValue(a);
log.add(CircuitChange.set(circuit, comp, attr, oldValue, newValue));
attrs.setValue(a, newValue);
}
}
public void setForCircuit(Circuit circuit, Attribute<?> attr,
Object newValue) {
@SuppressWarnings("unchecked")
Attribute<Object> a = (Attribute<Object>) attr;
AttributeSet attrs = circuit.getStaticAttributes();
Object oldValue = attrs.getValue(a);
log.add(CircuitChange.setForCircuit(circuit, attr, oldValue, newValue));
attrs.setValue(a, newValue);
}
private ReplacementMap getMap(Circuit circuit) {
ReplacementMap ret = replacements.get(circuit);
if (ret == null) {
ret = new ReplacementMap();
replacements.put(circuit, ret);
}
return ret;
}
CircuitTransaction getReverseTransaction() {
CircuitMutation ret = new CircuitMutation();
ArrayList<CircuitChange> log = this.log;
for (int i = log.size() - 1; i >= 0; i--) {
ret.change(log.get(i).getReverseChange());
}
return ret;
}
ReplacementMap getReplacementMap(Circuit circuit) {
return replacements.get(circuit);
}
void markModified(Circuit circuit) {
modified.add(circuit);
}
Collection<Circuit> getModifiedCircuits() {
return Collections.unmodifiableSet(modified);
}
}