private GeoElement[] processList(ExpressionNode n, MyList evalList) {
String label = n.getLabel();
GeoElement[] ret = new GeoElement[1];
// no operations or no variables are present, e.g.
// { a, b, 7 } or { 2, 3, 5 } + {1, 2, 4}
if (!n.hasOperations() || n.isConstant()) {
// PROCESS list items to generate a list of geoElements
ArrayList<GeoElement> geoElements = new ArrayList<GeoElement>();
boolean isIndependent = true;
// make sure we don't create any labels for the list elements
boolean oldMacroMode = cons.isSuppressLabelsActive();
cons.setSuppressLabelCreation(true);
int size = evalList.size();
for (int i = 0; i < size; i++) {
ExpressionNode en = (ExpressionNode) evalList.getListElement(i);
// we only take one resulting object
GeoElement[] results = processExpressionNode(en);
GeoElement geo = results[0];
// add to list
geoElements.add(geo);
if (geo.isLabelSet() || !geo.isIndependent()) isIndependent = false;
}
cons.setSuppressLabelCreation(oldMacroMode);
// Create GeoList object
ret[0] = kernel.List(label, geoElements, isIndependent);
}
// operations and variables are present
// e.g. {3, 2, 1} + {a, b, 2}
else {
ret[0] = kernel.ListExpression(label, n);
}
return ret;
}
public GeoElement[] processExpressionNode(ExpressionNode n) throws MyError {
// command is leaf: process command
if (n.isLeaf()) {
ExpressionValue leaf = n.getLeft();
if (leaf instanceof Command) {
Command c = (Command) leaf;
c.setLabels(n.getLabels());
return cmdDispatcher.processCommand(c, true);
} else if (leaf instanceof Equation) {
Equation eqn = (Equation) leaf;
eqn.setLabels(n.getLabels());
return processEquation(eqn);
} else if (leaf instanceof Function) {
Function fun = (Function) leaf;
fun.setLabels(n.getLabels());
return processFunction(n, fun);
} else if (leaf instanceof FunctionNVar) {
FunctionNVar fun = (FunctionNVar) leaf;
fun.setLabels(n.getLabels());
return processFunctionNVar(n, fun);
}
}
// ELSE: resolve variables and evaluate expressionnode
n.resolveVariables();
eval = n.evaluate();
boolean dollarLabelFound = false;
ExpressionNode myNode = n;
if (myNode.isLeaf()) myNode = myNode.getLeftTree();
// leaf (no new label specified): just return the existing GeoElement
if (eval.isGeoElement()
&& n.getLabel() == null
&& !(n.operation.equals(Operation.ELEMENT_OF))) {
// take care of spreadsheet $ names: don't loose the wrapper ExpressionNode here
// check if we have a Variable
switch (myNode.getOperation()) {
case $VAR_COL:
case $VAR_ROW:
case $VAR_ROW_COL:
// don't do anything here: we need to keep the wrapper ExpressionNode
// and must not return the GeoElement here
dollarLabelFound = true;
break;
default:
// return the GeoElement
GeoElement[] ret = {(GeoElement) eval};
return ret;
}
}
if (eval.isBooleanValue()) return processBoolean(n, eval);
else if (eval.isNumberValue()) return processNumber(n, eval);
else if (eval.isVectorValue()) return processPointVector(n, eval);
else if (eval.isVector3DValue()) return processPointVector3D(n, eval);
else if (eval.isTextValue()) return processText(n, eval);
else if (eval instanceof MyList) {
return processList(n, (MyList) eval);
} else if (eval instanceof Function) {
return processFunction(n, (Function) eval);
} else if (eval instanceof FunctionNVar) {
return processFunctionNVar(n, (FunctionNVar) eval);
}
// we have to process list in case list=matrix1(1), but not when list=list2
else if (eval instanceof GeoList && myNode.hasOperations()) {
Application.debug("should work");
return processList(n, ((GeoList) eval).getMyList());
} else if (eval.isGeoElement()) {
// e.g. B1 = A1 where A1 is a GeoElement and B1 does not exist yet
// create a copy of A1
if (n.getLabel() != null || dollarLabelFound) {
return processGeoCopy(n.getLabel(), n);
}
}
// REMOVED due to issue 131: http://code.google.com/p/geogebra/issues/detail?id=131
// // expressions like 2 a (where a:x + y = 1)
// // A1=b doesn't work for these objects
// else if (eval instanceof GeoLine) {
// if (((GeoLine)eval).getParentAlgorithm() instanceof AlgoDependentLine) {
// GeoElement[] ret = {(GeoElement) eval };
// return ret;
// }
//
// }
// if we get here, nothing worked
Application.debug("Unhandled ExpressionNode: " + eval + ", " + eval.getClass());
return null;
}