/**
* Parses given String str and tries to evaluate it to a GeoFunction Returns null if something
* went wrong. Michael Borcherds 2008-04-04
*/
public GeoFunction evaluateToFunction(String str, boolean suppressErrors) {
boolean oldMacroMode = cons.isSuppressLabelsActive();
cons.setSuppressLabelCreation(true);
GeoFunction func = null;
try {
ValidExpression ve = parser.parseGeoGebraExpression(str);
GeoElement[] temp = processValidExpression(ve);
if (temp[0].isGeoFunctionable()) {
GeoFunctionable f = (GeoFunctionable) temp[0];
func = f.getGeoFunction();
} else if (!suppressErrors) app.showError("InvalidInput", str);
} catch (CircularDefinitionException e) {
Application.debug("CircularDefinition");
if (!suppressErrors) app.showError("CircularDefinition");
} catch (Exception e) {
e.printStackTrace();
if (!suppressErrors) app.showError("InvalidInput", str);
} catch (MyError e) {
e.printStackTrace();
if (!suppressErrors) app.showError(e);
} catch (Error e) {
e.printStackTrace();
if (!suppressErrors) app.showError("InvalidInput", str);
}
cons.setSuppressLabelCreation(oldMacroMode);
return func;
}
/**
* Parses given String str and tries to evaluate it to a GeoImplicitPoly object. Returns null if
* something went wrong.
*
* @param str
* @boolean showErrors if false, only stacktraces are printed
* @return implicit polygon or null
*/
public GeoElement evaluateToGeoElement(String str, boolean showErrors) {
boolean oldMacroMode = cons.isSuppressLabelsActive();
cons.setSuppressLabelCreation(true);
GeoElement geo = null;
try {
ValidExpression ve = parser.parseGeoGebraExpression(str);
GeoElement[] temp = processValidExpression(ve);
geo = temp[0];
} catch (CircularDefinitionException e) {
Application.debug("CircularDefinition");
app.showError("CircularDefinition");
} catch (Exception e) {
e.printStackTrace();
if (showErrors) app.showError("InvalidInput", str);
} catch (MyError e) {
e.printStackTrace();
if (showErrors) app.showError(e);
} catch (Error e) {
e.printStackTrace();
if (showErrors) app.showError("InvalidInput", str);
}
cons.setSuppressLabelCreation(oldMacroMode);
return geo;
}
@Override
public GeoElement[] process(Command c) throws MyError {
int n = c.getArgumentNumber();
GeoElement[] arg;
arg = resArgs(c);
switch (n) {
case 1:
if (arg[0].isGeoFunctionable()) {
GeoNumeric var = new GeoNumeric(cons, 0.0);
arg[0].setEuclidianVisible(false);
arg[0].update();
var.setLabel(null); // set label to next available
var.setEuclidianVisible(true);
var.setIntervalMin(0.0);
var.setIntervalMax(1.0);
var.setAnimating(true);
var.setAnimationStep(0.01);
var.setAnimationType(GeoElement.ANIMATION_INCREASING);
var.update();
StringTemplate tpl = StringTemplate.maxPrecision;
StringBuilder sb = new StringBuilder();
sb.append("Function[");
sb.append(arg[0].getLabel(tpl));
sb.append(",x(Corner[1]), x(Corner[1]) (1-");
sb.append(var.getLabel(tpl));
sb.append(") + x(Corner(2)) ");
sb.append(var.getLabel(tpl));
sb.append("]");
kernelA.getAnimatonManager().startAnimation();
try {
return kernelA
.getAlgebraProcessor()
.processAlgebraCommandNoExceptionHandling(sb.toString(), true, false, true);
} catch (Exception e) {
e.printStackTrace();
throw argErr(app, c.getName(), arg[0]);
} catch (MyError e) {
e.printStackTrace();
throw argErr(app, c.getName(), arg[0]);
}
}
throw argErr(app, c.getName(), arg[0]);
default:
throw argNumErr(app, c.getName(), n);
}
}
/**
* for AlgebraView changes in the tree selection and redefine dialog
*
* @return changed geo
*/
public GeoElement changeGeoElementNoExceptionHandling(
GeoElement geo, ValidExpression newValue, boolean redefineIndependent, boolean storeUndoInfo)
throws Exception {
String oldLabel, newLabel;
GeoElement[] result;
try {
oldLabel = geo.getLabel();
newLabel = newValue.getLabel();
if (newLabel == null) {
newLabel = oldLabel;
newValue.setLabel(newLabel);
}
// make sure that points stay points and vectors stay vectors
if (newValue instanceof ExpressionNode) {
ExpressionNode n = (ExpressionNode) newValue;
if (geo.isGeoPoint()) n.setForcePoint();
else if (geo.isGeoVector()) n.setForceVector();
else if (geo.isGeoFunction()) n.setForceFunction();
}
if (newLabel.equals(oldLabel)) {
// try to overwrite
result = processValidExpression(newValue, redefineIndependent);
if (result != null && storeUndoInfo) app.storeUndoInfo();
return result[0];
} else if (cons.isFreeLabel(newLabel)) {
newValue.setLabel(oldLabel);
// rename to oldLabel to enable overwriting
result = processValidExpression(newValue, redefineIndependent);
result[0].setLabel(newLabel); // now we rename
if (storeUndoInfo) app.storeUndoInfo();
return result[0];
} else {
String str[] = {"NameUsed", newLabel};
throw new MyError(app, str);
}
} catch (CircularDefinitionException e) {
Application.debug("CircularDefinition");
throw e;
} catch (Exception e) {
e.printStackTrace();
throw new Exception(app.getError("InvalidInput") + ":\n" + newValue);
} catch (MyError e) {
e.printStackTrace();
throw new Exception(e.getLocalizedMessage());
} catch (Error e) {
e.printStackTrace();
throw new Exception(app.getError("InvalidInput") + ":\n" + newValue);
}
}
// G.Sturr 2010-7-5
// added 'allowErrorDialog' flag to handle the case of unquoted text
// entries in the spreadsheet
public GeoElement[] processAlgebraCommandNoExceptionHandling(
String cmd, boolean storeUndo, boolean allowErrorDialog, boolean throwMyError)
throws Exception {
ValidExpression ve;
try {
ve = parser.parseGeoGebraExpression(cmd);
} catch (ParseException e) {
// e.printStackTrace();
if (allowErrorDialog) {
app.showError(app.getError("InvalidInput") + ":\n" + cmd);
return null;
}
throw new MyException(app.getError("InvalidInput") + ":\n" + cmd, MyException.INVALID_INPUT);
} catch (MyError e) {
// e.printStackTrace();
if (allowErrorDialog) {
app.showError(e.getLocalizedMessage());
return null;
}
throw new Exception(e.getLocalizedMessage());
} catch (Error e) {
// e.printStackTrace();
if (allowErrorDialog) {
app.showError(app.getError("InvalidInput") + ":\n" + cmd);
return null;
}
throw new Exception(app.getError("InvalidInput") + ":\n" + cmd);
}
// process ValidExpression (built by parser)
GeoElement[] geoElements = null;
try {
geoElements = processValidExpression(ve);
if (storeUndo && geoElements != null) app.storeUndoInfo();
} catch (MyError e) {
e.printStackTrace();
// throw new Exception(e.getLocalizedMessage());
// show error with nice "Show Online Help" box
if (allowErrorDialog) { // G.Sturr 2010-7-5
app.showError(e);
e.printStackTrace();
} else if (throwMyError) throw new MyError(app, e.getLocalizedMessage(), e.getcommandName());
return null;
} catch (CircularDefinitionException e) {
Application.debug("CircularDefinition");
throw e;
} catch (Exception ex) {
Application.debug("Exception");
ex.printStackTrace();
throw new Exception(app.getError("Error") + ":\n" + ex.getLocalizedMessage());
}
return geoElements;
}
/**
* for AlgebraView changes in the tree selection and redefine dialog
*
* @return changed geo
*/
public GeoElement changeGeoElementNoExceptionHandling(
GeoElement geo, String newValue, boolean redefineIndependent, boolean storeUndoInfo)
throws Exception {
try {
ValidExpression ve = parser.parseGeoGebraExpression(newValue);
return changeGeoElementNoExceptionHandling(geo, ve, redefineIndependent, storeUndoInfo);
} catch (Exception e) {
e.printStackTrace();
throw new Exception(app.getError("InvalidInput") + ":\n" + newValue);
} catch (MyError e) {
e.printStackTrace();
throw new Exception(e.getLocalizedMessage());
} catch (Error e) {
e.printStackTrace();
throw new Exception(app.getError("InvalidInput") + ":\n" + newValue);
}
}
/**
* Parses given String str and tries to evaluate it to a GeoPoint. Returns null if something went
* wrong.
*/
public GeoPointND evaluateToPoint(String str, boolean showErrors) {
boolean oldMacroMode = cons.isSuppressLabelsActive();
cons.setSuppressLabelCreation(true);
GeoPointND p = null;
GeoElement[] temp = null;
;
try {
ValidExpression ve = parser.parseGeoGebraExpression(str);
if (ve instanceof ExpressionNode) {
ExpressionNode en = (ExpressionNode) ve;
en.setForcePoint();
}
temp = processValidExpression(ve);
p = (GeoPointND) temp[0];
} catch (CircularDefinitionException e) {
if (showErrors) {
Application.debug("CircularDefinition");
app.showError("CircularDefinition");
}
} catch (Exception e) {
if (showErrors) {
e.printStackTrace();
app.showError("InvalidInput", str);
}
} catch (MyError e) {
if (showErrors) {
e.printStackTrace();
app.showError(e);
}
} catch (Error e) {
if (showErrors) {
e.printStackTrace();
app.showError("InvalidInput", str);
}
}
cons.setSuppressLabelCreation(oldMacroMode);
return p;
}
/**
* Parses given String str and tries to evaluate it to a double. Returns Double.NaN if something
* went wrong.
*/
public double evaluateToDouble(String str, boolean suppressErrors) {
try {
ValidExpression ve = parser.parseExpression(str);
ExpressionNode en = (ExpressionNode) ve;
en.resolveVariables();
NumberValue nv = (NumberValue) en.evaluate();
return nv.getDouble();
} catch (Exception e) {
e.printStackTrace();
if (!suppressErrors) app.showError("InvalidInput", str);
return Double.NaN;
} catch (MyError e) {
e.printStackTrace();
if (!suppressErrors) app.showError(e);
return Double.NaN;
} catch (Error e) {
e.printStackTrace();
if (!suppressErrors) app.showError("InvalidInput", str);
return Double.NaN;
}
}
public GeoElement[] processEquation(Equation equ) throws MyError {
// Application.debug("EQUATION: " + equ);
// Application.debug("NORMALFORM POLYNOMIAL: " + equ.getNormalForm());
try {
equ.initEquation();
// Application.debug("EQUATION: " + equ.getNormalForm());
// check no terms in z
checkNoTermsInZ(equ);
if (equ.isFunctionDependent()) {
return processImplicitPoly(equ);
}
// consider algebraic degree of equation
// check not equation of eg plane
switch (equ.degree()) {
// linear equation -> LINE
case 1:
return processLine(equ, false);
// quadratic equation -> CONIC
case 2:
return processConic(equ);
default:
// test for "y= <rhs>" here as well
if (equ.getLHS().toString().trim().equals("y")) {
Function fun = new Function(equ.getRHS());
// try to use label of equation
fun.setLabel(equ.getLabel());
return processFunction(null, fun);
}
return processImplicitPoly(equ);
}
} catch (MyError eqnError) {
eqnError.printStackTrace();
// invalid equation: maybe a function of form "y = <rhs>"?
String lhsStr = equ.getLHS().toString().trim();
if (lhsStr.equals("y")) {
try {
// try to create function from right hand side
Function fun = new Function(equ.getRHS());
// try to use label of equation
fun.setLabel(equ.getLabel());
return processFunction(null, fun);
} catch (MyError funError) {
funError.printStackTrace();
}
}
// throw invalid equation error if we get here
if (eqnError.getMessage() == "InvalidEquation") throw eqnError;
else {
String[] errors = {"InvalidEquation", eqnError.getLocalizedMessage()};
throw new MyError(app, errors);
}
}
}
/**
* processes valid expression.
*
* @param ve
* @param redefineIndependent == true: independent objects are redefined too
* @throws MyError
* @throws Exception
* @return
*/
public GeoElement[] processValidExpression(ValidExpression ve, boolean redefineIndependent)
throws MyError, Exception {
// check for existing labels
String[] labels = ve.getLabels();
GeoElement replaceable = null;
if (labels != null && labels.length > 0) {
boolean firstTime = true;
for (int i = 0; i < labels.length; i++) {
GeoElement geo = kernel.lookupLabel(labels[i]);
if (geo != null) {
if (geo.isFixed()) {
String[] strs = {
"IllegalAssignment", "AssignmentToFixed", ":\n", geo.getLongDescription()
};
throw new MyError(app, strs);
} else {
// replace (overwrite or redefine) geo
if (firstTime) { // only one geo can be replaced
replaceable = geo;
firstTime = false;
}
}
}
}
}
GeoElement[] ret;
boolean oldMacroMode = cons.isSuppressLabelsActive();
if (replaceable != null) cons.setSuppressLabelCreation(true);
// we have to make sure that the macro mode is
// set back at the end
try {
ret = doProcessValidExpression(ve);
if (ret == null) { // eg (1,2,3) running in 2D
Application.debug("Unhandled ValidExpression : " + ve);
throw new MyError(app, app.getError("InvalidInput") + ":\n" + ve);
}
} finally {
cons.setSuppressLabelCreation(oldMacroMode);
}
// try to replace replaceable geo by ret[0]
if (replaceable != null && ret != null && ret.length > 0) {
// a changeable replaceable is not redefined:
// it gets the value of ret[0]
// (note: texts are always redefined)
if (!redefineIndependent && replaceable.isChangeable() && !(replaceable.isGeoText())) {
try {
replaceable.set(ret[0]);
replaceable.updateRepaint();
ret[0] = replaceable;
} catch (Exception e) {
String errStr =
app.getError("IllegalAssignment")
+ "\n"
+ replaceable.getLongDescription()
+ " = "
+ ret[0].getLongDescription();
throw new MyError(app, errStr);
}
}
// redefine
else {
try {
// SPECIAL CASE: set value
// new and old object are both independent and have same type:
// simply assign value and don't redefine
if (replaceable.isIndependent()
&& ret[0].isIndependent()
&& replaceable.getGeoClassType() == ret[0].getGeoClassType()) {
replaceable.set(ret[0]);
replaceable.updateRepaint();
ret[0] = replaceable;
}
// STANDARD CASE: REDFINED
else {
GeoElement newGeo = ret[0];
cons.replace(replaceable, newGeo);
// now all objects have changed
// get the new object with same label as our result
String newLabel = newGeo.isLabelSet() ? newGeo.getLabel() : replaceable.getLabel();
ret[0] = kernel.lookupLabel(newLabel, false);
}
} catch (CircularDefinitionException e) {
throw e;
} catch (Exception e) {
e.printStackTrace();
throw new MyError(app, "ReplaceFailed");
} catch (MyError e) {
e.printStackTrace();
throw new MyError(app, "ReplaceFailed");
}
}
}
return ret;
}