CaRMtl/rene/zirkel/expression/ExpressionString.java
2018-09-04 22:51:42 -04:00

246 lines
6.0 KiB
Java

/*
Copyright 2006 Rene Grothmann, modified by Eric Hakenholz
This file is part of C.a.R. software.
C.a.R. is a 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, version 3 of the License.
C.a.R. 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package rene.zirkel.expression;
import java.util.Enumeration;
import rene.util.MyVector;
import rene.zirkel.objects.ConstructionObject;
class EquationExpressionString {
public Expression E;
public EquationExpressionString(final Expression o) {
E = o;
}
@Override
public String toString() {
return E.toString();
}
public String getEquation() {
final ConstructionObject o = E.getObject();
if (o == null)
return "???";
else
return o.getEquation();
}
public void translate() {
E.translate();
}
public void addDep(final ConstructionObject o) {
E.addDep(o);
}
}
class NameExpressionString {
public Expression E;
public NameExpressionString(final Expression o) {
E = o;
}
@Override
public String toString() {
return E.toString();
}
public String getName() {
final ConstructionObject o = E.getObject();
if (o == null)
return "???";
else
return o.getName();
}
public void translate() {
E.translate();
}
public void addDep(final ConstructionObject o) {
E.addDep(o);
}
}
/**
* Class containing a chain of strings and expressions for alias and text lines.
*/
public class ExpressionString {
MyVector v = new MyVector(3); // Strings or Expressions
ConstructionObject O;
public ExpressionString(final String s, final ConstructionObject o) {
O = o;
v.removeAllElements();
int h1 = 0;
int n;
while ((n = s.indexOf("%", h1)) >= 0) {
final int h2 = s.indexOf("%", n + 1);
if (h2 == n + 1) // found %%
{
v.addElement(s.substring(h1, n));
v.addElement("%");
h1 = n + 2;
} else if (h2 >= 0) // found %...%
{
v.addElement(s.substring(h1, n));
if (s.charAt(n + 1) == '~') // found %~...%
{
s.substring(n + 2, h2);
v.addElement(new EquationExpressionString(new Expression(s
.substring(n + 2, h2), O.getConstruction(), O)));
h1 = h2 + 1;
} else if (s.charAt(n + 1) == '=') // found %=...%
{
s.substring(n + 2, h2);
v.addElement(new NameExpressionString(new Expression(s
.substring(n + 2, h2), O.getConstruction(), O)));
h1 = h2 + 1;
} else {
final Expression ex = new Expression(
s.substring(n + 1, h2), O.getConstruction(), O);
v.addElement(ex);
h1 = h2 + 1;
}
} else // only one %
{
v.addElement(s.substring(h1, n));
v.addElement("%");
h1 = n + 1;
}
}
if (!s.equals(""))
v.addElement(s.substring(h1));
// System.out.println(evaluate());
}
/**
* Get the original string back (but all objects with correct current
* names).
*/
@Override
public String toString() {
final StringBuffer sb = new StringBuffer();
final Enumeration e = v.elements();
while (e.hasMoreElements()) {
final Object o = e.nextElement();
if (o instanceof String) {
if (((String) o).equals("%"))
sb.append("%%");
else
sb.append((String) o);
} else if (o instanceof Expression) {
sb.append("%");
if (((Expression) o).isForcePlus())
sb.append("+");
sb.append(o.toString());
sb.append("%");
} else if (o instanceof EquationExpressionString) {
sb.append("%~");
sb.append(((EquationExpressionString) o).toString());
sb.append("%");
} else if (o instanceof NameExpressionString) {
sb.append("%=");
sb.append(((NameExpressionString) o).toString());
sb.append("%");
}
}
return sb.toString();
}
/**
* Get the string with all expressions evaluated.
*
* @return
*/
public String evaluate() {
final StringBuffer sb = new StringBuffer();
final Enumeration e = v.elements();
while (e.hasMoreElements()) {
final Object o = e.nextElement();
if (o instanceof String) {
if (((String) o).equals("%"))
sb.append("%");
else
sb.append((String) o);
} else if (o instanceof Expression) {
try {
double value = ((Expression) o).getValue();
value = O.round(value);
if (((Expression) o).isForcePlus() && value >= 0)
sb.append("+");
if (value == Math.floor(value + 0.5))
sb.append((int) (value));
else
sb.append(O.round(value));
} catch (final Exception exc) {
sb.append("???");
}
} else if (o instanceof EquationExpressionString) {
sb.append(((EquationExpressionString) o).getEquation());
} else if (o instanceof NameExpressionString) {
sb.append(((NameExpressionString) o).getName());
}
}
return sb.toString();
}
/**
* Translate the string for macros.
*/
public void translate() {
final Enumeration e = v.elements();
while (e.hasMoreElements()) {
final Object o = e.nextElement();
if (o instanceof Expression) {
((Expression) o).translate();
} else if (o instanceof EquationExpressionString) {
((EquationExpressionString) o).translate();
} else if (o instanceof NameExpressionString) {
((NameExpressionString) o).translate();
}
}
}
/**
* Add all objcts this string depends on to the DL of O.
*
* @param O
*/
public void addDep(final ConstructionObject oc) {
final Enumeration e = v.elements();
while (e.hasMoreElements()) {
final Object o = e.nextElement();
if (o instanceof Expression) {
((Expression) o).addDep(oc);
} else if (o instanceof EquationExpressionString) {
((EquationExpressionString) o).addDep(oc);
} else if (o instanceof NameExpressionString) {
((NameExpressionString) o).addDep(oc);
}
}
}
}