/*******************************************************************************
* This file is part of logisim-evolution.
*
* logisim-evolution is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* logisim-evolution is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with logisim-evolution. If not, see <http://www.gnu.org/licenses/>.
*
* Original code by Carl Burch (http://www.cburch.com), 2011.
* Subsequent modifications by :
* + Haute École Spécialisée Bernoise
* http://www.bfh.ch
* + Haute École du paysage, d'ingénierie et d'architecture de Genève
* http://hepia.hesge.ch/
* + Haute École d'Ingénierie et de Gestion du Canton de Vaud
* http://www.heig-vd.ch/
* The project is currently maintained by :
* + REDS Institute - HEIG-VD
* Yverdon-les-Bains, Switzerland
* http://reds.heig-vd.ch
*******************************************************************************/
package com.cburch.logisim.std.gates;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.ArrayList;
import java.util.Map;
import com.bfh.logisim.designrulecheck.CorrectLabel;
import com.bfh.logisim.settings.Settings;
import com.cburch.logisim.analyze.model.Expression;
import com.cburch.logisim.circuit.ExpressionComputer;
import com.cburch.logisim.data.Attribute;
import com.cburch.logisim.data.AttributeSet;
import com.cburch.logisim.data.BitWidth;
import com.cburch.logisim.data.Bounds;
import com.cburch.logisim.data.Direction;
import com.cburch.logisim.data.Location;
import com.cburch.logisim.data.Value;
import com.cburch.logisim.file.Options;
import com.cburch.logisim.instance.Instance;
import com.cburch.logisim.instance.InstanceFactory;
import com.cburch.logisim.instance.InstancePainter;
import com.cburch.logisim.instance.InstanceState;
import com.cburch.logisim.instance.Port;
import com.cburch.logisim.instance.StdAttr;
import com.cburch.logisim.tools.key.BitWidthConfigurator;
import com.cburch.logisim.util.GraphicsUtil;
import com.cburch.logisim.util.Icons;
class Buffer extends InstanceFactory {
private class BufferGateHDLGeneratorFactory extends
AbstractGateHDLGenerator {
@Override
public ArrayList<String> GetLogicFunction(int nr_of_inputs,
int bitwidth, boolean is_one_hot, String HDLType) {
ArrayList<String> Contents = new ArrayList<String>();
if (HDLType.equals(Settings.VHDL))
Contents.add(" Result <= Input_1;");
else
Contents.add(" assign Result = Input_1;");
Contents.add("");
return Contents;
}
}
//
// static methods - shared with other classes
//
static Value repair(InstanceState state, Value v) {
AttributeSet opts = state.getProject().getOptions().getAttributeSet();
Object onUndefined = opts.getValue(Options.ATTR_GATE_UNDEFINED);
boolean errorIfUndefined = onUndefined
.equals(Options.GATE_UNDEFINED_ERROR);
Value repaired;
if (errorIfUndefined) {
int vw = v.getWidth();
BitWidth w = state.getAttributeValue(StdAttr.WIDTH);
int ww = w.getWidth();
if (vw == ww && v.isFullyDefined())
return v;
Value[] vs = new Value[w.getWidth()];
for (int i = 0; i < vs.length; i++) {
Value ini = i < vw ? v.get(i) : Value.ERROR;
vs[i] = ini.isFullyDefined() ? ini : Value.ERROR;
}
repaired = Value.create(vs);
} else {
repaired = v;
}
Object outType = state.getAttributeValue(GateAttributes.ATTR_OUTPUT);
return AbstractGate.pullOutput(repaired, outType);
}
public static InstanceFactory FACTORY = new Buffer();
private Buffer() {
super("Buffer", Strings.getter("bufferComponent"));
setAttributes(
new Attribute[] { StdAttr.FACING, StdAttr.WIDTH,
GateAttributes.ATTR_OUTPUT, StdAttr.LABEL,
StdAttr.LABEL_FONT }, new Object[] { Direction.EAST,
BitWidth.ONE, GateAttributes.OUTPUT_01, "",
StdAttr.DEFAULT_LABEL_FONT });
setIcon(Icons.getIcon("bufferGate.gif"));
setFacingAttribute(StdAttr.FACING);
setKeyConfigurator(new BitWidthConfigurator(StdAttr.WIDTH));
setPorts(new Port[] { new Port(0, 0, Port.OUTPUT, StdAttr.WIDTH),
new Port(0, -20, Port.INPUT, StdAttr.WIDTH), });
}
//
// methods for instances
//
@Override
protected void configureNewInstance(Instance instance) {
configurePorts(instance);
instance.addAttributeListener();
NotGate.configureLabel(instance, false, null);
}
private void configurePorts(Instance instance) {
Direction facing = instance.getAttributeValue(StdAttr.FACING);
Port[] ports = new Port[2];
ports[0] = new Port(0, 0, Port.OUTPUT, StdAttr.WIDTH);
Location out = Location.create(0, 0).translate(facing, -20);
ports[1] = new Port(out.getX(), out.getY(), Port.INPUT, StdAttr.WIDTH);
instance.setPorts(ports);
}
@Override
public String getHDLName(AttributeSet attrs) {
StringBuffer CompleteName = new StringBuffer();
CompleteName.append(CorrectLabel.getCorrectLabel(this.getName())
.toUpperCase());
CompleteName.append("_COMPONENT");
BitWidth width = attrs.getValue(StdAttr.WIDTH);
if (width.getWidth() > 1)
CompleteName.append("_BUS");
return CompleteName.toString();
}
@Override
public Object getInstanceFeature(final Instance instance, Object key) {
if (key == ExpressionComputer.class) {
return new ExpressionComputer() {
public void computeExpression(
Map<Location, Expression> expressionMap) {
Expression e = expressionMap.get(instance
.getPortLocation(1));
if (e != null) {
expressionMap.put(instance.getPortLocation(0), e);
}
}
};
}
return super.getInstanceFeature(instance, key);
}
@Override
public Bounds getOffsetBounds(AttributeSet attrs) {
Direction facing = attrs.getValue(StdAttr.FACING);
if (facing == Direction.SOUTH)
return Bounds.create(-9, -20, 18, 20);
if (facing == Direction.NORTH)
return Bounds.create(-9, 0, 18, 20);
if (facing == Direction.WEST)
return Bounds.create(0, -9, 20, 18);
return Bounds.create(-20, -9, 20, 18);
}
@Override
public boolean HasThreeStateDrivers(AttributeSet attrs) {
if (attrs.containsAttribute(GateAttributes.ATTR_OUTPUT))
return !(attrs.getValue(GateAttributes.ATTR_OUTPUT) == GateAttributes.OUTPUT_01);
else
return false;
}
@Override
public boolean HDLSupportedComponent(String HDLIdentifier,
AttributeSet attrs) {
if (MyHDLGenerator == null)
MyHDLGenerator = new BufferGateHDLGeneratorFactory();
return MyHDLGenerator.HDLTargetSupported(HDLIdentifier, attrs);
}
@Override
protected void instanceAttributeChanged(Instance instance, Attribute<?> attr) {
if (attr == StdAttr.FACING) {
instance.recomputeBounds();
configurePorts(instance);
NotGate.configureLabel(instance, false, null);
}
}
private void paintBase(InstancePainter painter) {
Direction facing = painter.getAttributeValue(StdAttr.FACING);
Location loc = painter.getLocation();
int x = loc.getX();
int y = loc.getY();
Graphics g = painter.getGraphics();
g.translate(x, y);
double rotate = 0.0;
if (facing != Direction.EAST && g instanceof Graphics2D) {
rotate = -facing.toRadians();
((Graphics2D) g).rotate(rotate);
}
GraphicsUtil.switchToWidth(g, 2);
int[] xp = new int[4];
int[] yp = new int[4];
xp[0] = 0;
yp[0] = 0;
xp[1] = -19;
yp[1] = -7;
xp[2] = -19;
yp[2] = 7;
xp[3] = 0;
yp[3] = 0;
g.drawPolyline(xp, yp, 4);
if (rotate != 0.0) {
((Graphics2D) g).rotate(-rotate);
}
g.translate(-x, -y);
}
//
// painting methods
//
@Override
public void paintGhost(InstancePainter painter) {
paintBase(painter);
}
@Override
public void paintInstance(InstancePainter painter) {
Graphics g = painter.getGraphics();
g.setColor(Color.BLACK);
paintBase(painter);
painter.drawPorts();
painter.drawLabel();
}
@Override
public void propagate(InstanceState state) {
Value in = state.getPortValue(1);
in = Buffer.repair(state, in);
state.setPort(0, in, GateAttributes.DELAY);
}
}