/*******************************************************************************

 * Copyright (c) 2010 University of Illinois at Urbana-Champaign and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *    UIUC - Initial API and implementation

 *******************************************************************************/

package org.eclipse.photran.internal.core.refactoring;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.OperationCanceledException;

import org.eclipse.ltk.core.refactoring.RefactoringStatus;

import org.eclipse.ltk.core.refactoring.RefactoringStatusContext;

import org.eclipse.photran.internal.core.analysis.binding.Definition;

import org.eclipse.photran.internal.core.analysis.binding.ScopingNode;

import org.eclipse.photran.internal.core.lexer.Terminal;

import org.eclipse.photran.internal.core.lexer.Token;

import org.eclipse.photran.internal.core.parser.ASTCallStmtNode;

import org.eclipse.photran.internal.core.parser.ASTEntityDeclNode;

import org.eclipse.photran.internal.core.parser.ASTIntConstNode;

import org.eclipse.photran.internal.core.parser.ASTListNode;

import org.eclipse.photran.internal.core.parser.ASTSeparatedListNode;

import org.eclipse.photran.internal.core.parser.ASTSubroutineArgNode;

import org.eclipse.photran.internal.core.parser.ASTSubroutineParNode;

import org.eclipse.photran.internal.core.parser.ASTSubroutineStmtNode;

import org.eclipse.photran.internal.core.parser.ASTSubroutineSubprogramNode;

import org.eclipse.photran.internal.core.parser.ASTTypeDeclarationStmtNode;

import org.eclipse.photran.internal.core.parser.IASTListNode;

import org.eclipse.photran.internal.core.parser.IASTNode;

import org.eclipse.photran.internal.core.parser.IBodyConstruct;

import org.eclipse.photran.internal.core.refactoring.infrastructure.FortranEditorRefactoring;

import org.eclipse.photran.internal.core.reindenter.Reindenter;

import org.eclipse.photran.internal.core.vpg.PhotranTokenRef;

import org.eclipse.photran.internal.core.vpg.PhotranVPG;

/**

 * 

 * 

 * This refactoring allows a user to select a subroutine and to add a new parameter to the list.

 * The refactoring will ask for a declaration line for the parameter, a default value with which to 

 * update all callers of the subroutine, and a position in the list at which to add the new parameter.

 * The refactoring ensures that the declaration line is valid, contains some logic to ensure that the 

 * default value matches the appropriate type, and ensures that the position is in bounds.  It then updates

 * the subroutine signature and updates the callers of the subroutine.  If the callers specify the variable name

 * in the call list, the refactoring will match this pattern.

 * 

 */

public class AddSubroutineParameterRefactoring extends FortranEditorRefactoring

{

    private ASTSubroutineStmtNode selectedSubroutine;

    private List<ASTSubroutineParNode> oldParameterList;

    private List<ASTSubroutineParNode> newParameterList;

    private int position = 0;

    private String parameterName = null;

    private String declaration = "integer, intent(in) :: newName"; //$NON-NLS-1$

    private String defaultValue = "0"; //$NON-NLS-1$

    private ASTTypeDeclarationStmtNode declStmt = null;

    private String type = "integer"; //$NON-NLS-1$

    public List<ASTSubroutineParNode> getOldParameterList() {

        return oldParameterList;

    }

    public String getDeclaration() {

        assert declaration != null;

        return this.declaration;

    }

    public int getPosition() {

        return this.position;

    }

    public String getDefault() {

        assert defaultValue != null;

        return this.defaultValue;

    }

    public void setPosition(int position) {

        this.position = position;

    }

    /*

     * Sets the declaration member, but first checks that an appropriate type is at the

     * beggining of the declaration.  If not, it assumes that "real" should be prepended.

     * The type member is then set to this type.

     * 

     * @param declaration The declaration to be set.

     */

    public void setDeclaration(String declaration) {

        // Add "real" to all declaration lines that do not specify a type to avoid parser errors.

        String[] declArgs = declaration.split(","); //$NON-NLS-1$

        String[] validTypes = {"integer","real","logical","double","character"};  //$NON-NLS-1$ //$NON-NLS-2$//$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$

        boolean hasTypeDefined = false;

        for (int i = 0; i < validTypes.length; i++) {

            if (validTypes[i].equals(declArgs[0])) {

                hasTypeDefined = true;

                type = declArgs[0];

                break;

            }

        }

        if (!hasTypeDefined) {

            type = "real"; //$NON-NLS-1$

            if (declArgs.length == 1)

                declaration = "real, " + declaration; //$NON-NLS-1$

            else declaration = "real" + " :: " + declaration; //$NON-NLS-1$ //$NON-NLS-2$

        }

        this.declaration = declaration;

    }

    public void setDefaultValue(String defValue) {

        defaultValue = defValue;

    }

    /* (non-Javadoc)

     * @see org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring#doCheckInitialConditions(org.eclipse.ltk.core.refactoring.RefactoringStatus, org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    protected void doCheckInitialConditions(RefactoringStatus status, IProgressMonitor pm)

        throws org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring.PreconditionFailure

    {

        ensureProjectHasRefactoringEnabled(status);

        ensureSubroutineIsSelected();

        if(!matchingDeclarationsInInterfacesUniquelyBind())

            status.addWarning(Messages.AddSubroutineParameterRefactoring_matchingDeclarationsDoNotUniquelyBind);

        oldParameterList = getSubroutineParameters();

    }

    /*

     * By looking at the AST tree, starting at the node supplied to the refactoring as the selected node, this method

     * determines if a subroutine node has been selected or not.

     * 

     */

    private void ensureSubroutineIsSelected()

        throws org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring.PreconditionFailure

    {

        IASTNode temporaryNode = findEnclosingNode(astOfFileInEditor, selectedRegionInEditor);

        if(temporaryNode == null)

            fail(Messages.AddSubroutineParameterRefactoring_selectSubroutineError);

        if(temporaryNode instanceof ASTSubroutineSubprogramNode)

            selectedSubroutine = ((ASTSubroutineSubprogramNode)temporaryNode).getSubroutineStmt();

        else if(temporaryNode instanceof ASTSubroutineStmtNode)

        {

            if(temporaryNode.findNearestAncestor(ASTSubroutineSubprogramNode.class) == null)

                fail(Messages.AddSubroutineParameterRefactoring_selectSubroutineError);

            selectedSubroutine = (ASTSubroutineStmtNode)temporaryNode;

        }

        else

            fail(Messages.AddSubroutineParameterRefactoring_selectSubroutineError);

    }

    /*

     * This method determines if a matching declaration already exists in scope, and if so, will fail the refactoring.

     * 

     */

    private boolean matchingDeclarationsInInterfacesUniquelyBind()

    {

        for(Definition declaration : getInterfaceDeclarations())

            if(declaration.resolveInterfaceBinding().size() != 1)

                return false;

        return true;

    }

    /* (non-Javadoc)

     * @see org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring#doCheckFinalConditions(org.eclipse.ltk.core.refactoring.RefactoringStatus, org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    protected void doCheckFinalConditions(RefactoringStatus status, IProgressMonitor pm)

        throws org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring.PreconditionFailure

    {

        ensureDeclarationIsValid();

        parameterName = declStmt.getEntityDeclList().get(0).getObjectName().getObjectName().getText();

        ensurePositionIsValid();

        ensureDefaultValueIsValid();

        checkForConflictingBindings(pm, status);

    }

    /*

     * This method ensures that the default value supplied is valid by applying logic that 

     * tests whether or not the default type supplied matches the type supplied in the declaration line.

     * For example, .true. and .false. are reserved for logical types.  This method also ensures that the

     * default value is not a variable name beginning with a number.

     * 

     */

    private void ensureDefaultValueIsValid()

        throws org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring.PreconditionFailure

    {

        if (defaultValue == null || 

            defaultValue.equals("") ||  //$NON-NLS-1$

            isWhiteSpace(defaultValue) || 

            isVariableNameBeginningWithNumber(defaultValue) || 

            (isTrueOrFalse(defaultValue) && !type.equals("logical")) ||  //$NON-NLS-1$

            (isANumber(defaultValue) && (!type.equals("integer") && !type.equals("real"))) ||   //$NON-NLS-1$//$NON-NLS-2$

            (isRealAndNotInteger(defaultValue) && type.equals("integer")) ||  //$NON-NLS-1$

            (defaultValue.equals("null") && !declaration.contains("pointer")))  //$NON-NLS-1$ //$NON-NLS-2$

            fail(Messages.AddSubroutineParameterRefactoring_InvalidDefaultValue);

    }

    /*

     * @param str A string to be tested

     * @return <code> true </code> if the selected string is a real number, and <code> false </code> if the selected string

     * is ann integer or not a number.

     * 

     */

    private boolean isRealAndNotInteger(String str) {

        if (isANumber(str)) {

            try {

                Integer.parseInt(str);

            }

            catch (NumberFormatException e) {

                return true;

            }

        }

        return false;

    }

    /*

     * @param str A string to be tested

     * @return <code> true </code> if the selected string is ".true." or ".false.", and <code> false </code> if the selected string

     * is anything else.

     */

    private boolean isTrueOrFalse(String str) {

    	if (str == null)

    		return false;

        return str.equals(".true.") || str.equals(".false."); //$NON-NLS-1$ //$NON-NLS-2$

    }

    /*

     * @param str A string to be tested

     * @return <code> true </code> if the string begins with a number but is not a number (hence, a variable name beginning with a number)

     * and <code> false </code> otherwise.

     * 

     */

    private boolean isVariableNameBeginningWithNumber(String str) {

        if (str != null) {

            if (str.length() != 0) {

                if (isANumber(str.substring(0,1))) {

                    if (!isANumber(str))

                        return true;

                }

            }

        }

        return false;

    }

    /*

     * @param str A string

     * @return <code> true </code> if str is a number.

     */

    private boolean isANumber(String str) {

        try {

            Double.parseDouble(str);

        }

        catch (NumberFormatException e) {

            return false;

        }

        return true;

    }

    /*

     * This function ensures that the position given to the refactoring is in bounds for the current size of the list, and if not,

     * fails the refactoring.

     * 

     */

    private void ensurePositionIsValid()

        throws org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring.PreconditionFailure {

        if (position > oldParameterList.size() || position < 0)

            fail(Messages.AddSubroutineParameterRefactoring_InvalidParameterPosition);

    }

    /*

     * This function attempts to produce a declaration node by passing the declaration line on to a parser.  If this node is returned

     * as an error node, the refactoring fails.

     * 

     */

    private void ensureDeclarationIsValid()

        throws org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring.PreconditionFailure {

        IBodyConstruct decl = parseLiteralStatementNoFail(declaration);

        if (decl == null || !(decl instanceof ASTTypeDeclarationStmtNode))

            fail(Messages.AddSubroutineParameterRefactoring_InvalidDeclaration);

        declStmt = (ASTTypeDeclarationStmtNode)decl;

        IASTListNode<ASTEntityDeclNode> entityDeclList = declStmt.getEntityDeclList();

        if (entityDeclList == null) {

            fail(Messages.AddSubroutineParameterRefactoring_InvalidDeclaration);

        }

    }

    /*

     * This function checks to see whether or not the variable name supplied to the refactoring is already in scope in the subroutine.

     * 

     */

    private void checkForConflictingBindings(IProgressMonitor pm, RefactoringStatus status) {

        Definition def = arbitraryDefinitionInScope();

        if (def == null) return; // No declarations in scope, so the new one can't conflict

        checkForConflictingBindings(pm,

            new ConflictingBindingErrorHandler(status),

            def,

            Collections.<PhotranTokenRef>emptyList(),

            parameterName);

    }

    /*

     * This function returns an arbitrary definition line in scope of the current node.  It is used to iterate through

     * the declarations to see if there are any conflicts.

     * 

     */

    private Definition arbitraryDefinitionInScope() {

        ScopingNode enclosingScope = selectedSubroutine.findNearestAncestor(ScopingNode.class);

        List<Definition> allDefs = enclosingScope.getAllDefinitions();

        if (allDefs.isEmpty())

            return null;

        else

            return allDefs.get(0);

    }

    /*

     * @param str A string

     * @return <code> true </code> if str is only white space.  This is used to test if default values are nothing but white space.

     */

    private boolean isWhiteSpace(String str)

    {

        return str.replace(" ", "").replace("\t", "").equals(""); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$

    }

    /* (non-Javadoc)

     * @see org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring#doCreateChange(org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    protected void doCreateChange(IProgressMonitor pm) throws CoreException,

        OperationCanceledException

    {

        buildNewParameterListWithNewParameter();

        // Change the arguments list to the new list

        permuteArgumentList(selectedSubroutine);

        addArgumentDeclaration(selectedSubroutine);

        permuteCallSites();

        addChangeFromModifiedAST(fileInEditor, pm);

        vpg.releaseAST(fileInEditor);

    }

    /*

     * This function adds the declaration line to the subroutine.

     */

    private void addArgumentDeclaration(ASTSubroutineStmtNode subroutineStatement)

    {

        ASTSubroutineSubprogramNode subroutine = (ASTSubroutineSubprogramNode)subroutineStatement.getParent();

        IASTListNode<IBodyConstruct> statements = subroutine.getBody();

        if (statements == null) {

            statements = new ASTListNode<IBodyConstruct>();

            subroutine.setBody(statements);

        }

        statements.add(0, declStmt);

        Reindenter.reindent(declStmt, astOfFileInEditor);

    }

    /* (non-Javadoc)

     * @see org.eclipse.ltk.core.refactoring.Refactoring#getName()

     */

    @Override

    public String getName()

    {

        return Messages.AddSubroutineParameterRefactoring_Name;

    }

    /*

     * This function returns the list of subroutine parameters from the selected subroutine node.

     */

    public List<ASTSubroutineParNode> getSubroutineParameters()

    {

        if(selectedSubroutine.getSubroutinePars() != null)

            return selectedSubroutine.getSubroutinePars();

        return new ArrayList<ASTSubroutineParNode>();

    }

    /*

     * This function returns a collection of interface declarations.

     */

    private Collection<Definition> getInterfaceDeclarations()

    {

        List<Definition> subroutineDefinitions = selectedSubroutine.getSubroutineName().getSubroutineName().resolveBinding();

        if(subroutineDefinitions.size() != 1)

            return new ArrayList<Definition>();

        return subroutineDefinitions.get(0).findMatchingDeclarationsInInterfaces();

    }

    /*

     * This function builds the new parameter list to be supplied to the subroutine node by adding the new parameter to

     * the list in the appropriate position.

     */

    public void buildNewParameterListWithNewParameter()

    {

        // Create new variable

        ASTSubroutineParNode newParameter = new ASTSubroutineParNode();

        Token variableName = generateVariableName();

        newParameter.setVariableName(variableName);

        // Create new list

        newParameterList = new ArrayList<ASTSubroutineParNode>(oldParameterList);

        newParameterList.add(position, newParameter);

    }

    /*

     * This function returns a token for a variable with the name of the new parameter name.

     */

    private Token generateVariableName()

    {

        Token variableName = new Token(Terminal.T_IDENT, parameterName);

        return variableName;

    }

    /*

     * This function changes the argument list of the subroutine statement node to the new list generated in buildNewParameterListWithNewParameter()

     */

    protected void permuteArgumentList(ASTSubroutineStmtNode node)

    {

        ASTSeparatedListNode<ASTSubroutineParNode> newParameterList = new ASTSeparatedListNode<ASTSubroutineParNode>(new Token(Terminal.T_COMMA, ","), this.newParameterList); //$NON-NLS-1$

        node.setSubroutinePars(newParameterList);

    }

    /*

     * This function changes all call sites to be updated to have the new argument in place, and will match any calling pattern currently used.

     */

    private void permuteCallSites()

    {

        for(ASTCallStmtNode callStmt : getCallSites())

        {

            int previousArgumentListSize = 0;

            if(callStmt.getArgList() != null) {

                previousArgumentListSize = callStmt.getArgList().size();

            }

            // Generate new IExpression Node for the default value

            ASTIntConstNode expr = new ASTIntConstNode();

            expr.setIntConst(new Token(Terminal.T_ICON, defaultValue));

            ASTSubroutineArgNode addedParArg = new ASTSubroutineArgNode();

            addedParArg.setExpr(expr);

            // Test to see if the call site is using the "(variableName = value, variablename = value)" pattern, or simply the "(value, value)" pattern

            // The new parameter should follow this pattern at the call site, and should assume the (value) pattern if the list was previously empty.

            if (previousArgumentListSize > 0) {

                int positionToCompareTo = Math.min(position, previousArgumentListSize-1);

                ASTSubroutineParNode firstParameter = oldParameterList.get(positionToCompareTo);

                ASTSubroutineArgNode firstParameterArgument = getActualArgFromCallStmt(callStmt, firstParameter.getVariableName(), positionToCompareTo);

                if (firstParameterArgument.getName() != null)

                    addedParArg.setName(new Token(Terminal.T_IDENT, parameterName));

            }

            ArrayList<ASTSubroutineArgNode> newParameterListForCallSite = new ArrayList<ASTSubroutineArgNode>(); 

            for (int i = 0; i < previousArgumentListSize; i++) {

                ASTSubroutineParNode desiredPar = oldParameterList.get(i);

                ASTSubroutineArgNode desiredParArgument = getActualArgFromCallStmt(callStmt, desiredPar.getVariableName(), i);

                newParameterListForCallSite.add(desiredParArgument);

            }

            newParameterListForCallSite.add(position, addedParArg);

            ASTSeparatedListNode<ASTSubroutineArgNode> newArgList = new ASTSeparatedListNode<ASTSubroutineArgNode>(new Token(Terminal.T_COMMA, ","), newParameterListForCallSite); //$NON-NLS-1$

            callStmt.setArgList(newArgList);

        }

    }

    /*

     * This function returns the set of call sites for the subroutine that was selected.

     */

    private Set<ASTCallStmtNode> getCallSites()

    {

        List<Definition> subroutineDefinitions = selectedSubroutine.getSubroutineName().getSubroutineName().resolveBinding();

        HashSet<ASTCallStmtNode> result = new HashSet<ASTCallStmtNode>();

        if (subroutineDefinitions.size() != 1)

            return result; 

        for(PhotranTokenRef tokenRef : subroutineDefinitions.get(0).findAllReferences(true))

        {

            Token token = tokenRef.findToken();

            ASTCallStmtNode callStmtNode = token.findNearestAncestor(ASTCallStmtNode.class);

            if(callStmtNode != null)

                result.add(callStmtNode);

        }

        return result;

    }

    /*

     * This function gets an argument from a call statement, in order to check if it follows the pattern of "Variablename = Value".

     */

    private ASTSubroutineArgNode getActualArgFromCallStmt(ASTCallStmtNode callStmt, Token desiredParName, int desiredParIndex)

    {

        for(int i = 0; i < callStmt.getArgList().size(); i++)

        {

            ASTSubroutineArgNode argument = callStmt.getArgList().get(i);

            if(argument.getName() == null || desiredParName == null)

            {

                if(i == desiredParIndex)

                    return argument;

            }

            else

            {

                String argumentName = PhotranVPG.canonicalizeIdentifier(argument.getName().getText());

                String parameterName = PhotranVPG.canonicalizeIdentifier(desiredParName.getText());

                if(argumentName.equals(parameterName))

                    return argument;

            }

        }

        return null;

    }

    /*

     * This class handles all error cases for conflicting variable names or bindings.

     */

    private final class ConflictingBindingErrorHandler implements IConflictingBindingCallback

    {

        private final RefactoringStatus status;

        private ConflictingBindingErrorHandler(RefactoringStatus status) { this.status = status; }

        public void addConflictError(List<Conflict> conflictingDef)

        {

            Conflict conflict = conflictingDef.get(0);

            String msg = Messages.bind(Messages.AddSubroutineParameterRefactoring_NameConflictsWith, conflict.name, vpg.getDefinitionFor(conflict.tokenRef));

            RefactoringStatusContext context = createContext(conflict.tokenRef); // Highlights problematic definition

            status.addError(msg, context);

        }

        public void addConflictWarning(List<Conflict> conflictingDef)

        {

            Conflict conflict = conflictingDef.get(0);

            String msg = Messages.bind(Messages.AddSubroutineParameterRefactoring_NameMightConflictWithSubprogram, conflict.name);

            RefactoringStatusContext context = createContext(conflict.tokenRef); // Highlights problematic definition

            status.addWarning(msg, context);

        }

        public void addReferenceWillChangeError(String newName, Token reference)

        {

            throw new IllegalStateException();

        }

    }

}

    public static String AddSubroutineParameterRefactoring_InvalidDeclaration;

    public static String AddSubroutineParameterRefactoring_InvalidDefaultValue;

    public static String AddSubroutineParameterRefactoring_InvalidParameterPosition;

    public static String AddSubroutineParameterRefactoring_matchingDeclarationsDoNotUniquelyBind;

    public static String AddSubroutineParameterRefactoring_Name;

    public static String AddSubroutineParameterRefactoring_NameConflictsWith;

    public static String AddSubroutineParameterRefactoring_NameMightConflictWithSubprogram;

    public static String AddSubroutineParameterRefactoring_selectSubroutineError;

AddSubroutineParameterRefactoring_InvalidDeclaration=Invalid declaration line for new parameter.

AddSubroutineParameterRefactoring_InvalidDefaultValue=Invalid default value for this parameter for all callers of this subroutine.

AddSubroutineParameterRefactoring_InvalidParameterPosition=Parameter position is out of bounds.

AddSubroutineParameterRefactoring_matchingDeclarationsDoNotUniquelyBind=Matching declarations in interface blocks do not uniquely bind to the selected subroutine.

AddSubroutineParameterRefactoring_Name=Add Subroutine Parameter

AddSubroutineParameterRefactoring_NameConflictsWith=The name "{0}" conflicts with {1}

AddSubroutineParameterRefactoring_NameMightConflictWithSubprogram=Name might have conflict with subprogram.

AddSubroutineParameterRefactoring_selectSubroutineError=Please select a subroutine definition.

program basic ! basic test, adding an integer with intent in, default value 0, at position 0.

end program basic

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in) :: y, 0, 0, pass

    integer, intent(in) :: z

end subroutine

program basic ! basic test, adding an integer with intent in, default value 0, at position 0.

end program basic

subroutine sub(y,z) !<<<<< 4, 1, 4, 5, integer; intent(in) :: y, 0, 0, pass

    integer, intent(in) :: y

    integer, intent(in) :: z

end subroutine

program invalidtype ! Fails because the type specified is invalid in the declaration line.

end program invalidtype

subroutine sub(z) !<<<<< 4, 1, 4, 5, invalidtype :: y, 0, 0, fail-final

    integer, intent(in) :: z

end subroutine

program variablenameaddedincallsite ! Tests that when y is added, the call site adds y=0

    implicit none

    call sub(z=2)

end program variablenameaddedincallsite

subroutine sub(z) !<<<<< 5, 1, 5, 5, integer; intent(in) :: y, 1, 0, pass

    integer, intent(in) :: z

end subroutine

program variablenameaddedincallsite ! Tests that when y is added, the call site adds y=0

    implicit none

    call sub(z=2,y=0)

end program variablenameaddedincallsite

subroutine sub(z,y) !<<<<< 5, 1, 5, 5, integer; intent(in) :: y, 1, 0, pass

    integer, intent(in) :: y

    integer, intent(in) :: z

end subroutine

program validattributes ! Tests that valid attributes (intent(inout)) are allowed.

end program validattributes

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(inout) :: y, 0, 0, pass

    integer, intent(in) :: z

end subroutine

program validattributes ! Tests that valid attributes (intent(inout)) are allowed.

end program validattributes

subroutine sub(y,z) !<<<<< 4, 1, 4, 5, integer; intent(inout) :: y, 0, 0, pass

    integer, intent(inout) :: y

    integer, intent(in) :: z

end subroutine

program invalidvalidattributes ! Tests that invalid attributes fail

end program invalidvalidattributes

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(inoot) :: y, 0, 0, fail-final

    integer, intent(in) :: z

end subroutine

program conflictingattributes ! Tests that conflicting attributes (two types) fail.

end program conflictingattributes

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; real; intent(out) :: y, 0, 0, fail-final

    integer, intent(in) :: z

end subroutine

program conflictingvariablenames ! Tests that a parameter cannot be given the same name as another in scope.

end program conflictingvariablenames

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in) :: alreadyused, 0, 0, fail-final

	real :: alreadyused

    integer, intent(in) :: z

end subroutine

program whitespacevariablename ! Tests that a variable name cannot be set to just white space.

end program whitespacevariablename

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(inout) ::  	, 0, 0, fail-final

    integer, intent(in) :: z

end subroutine

program parameternamebeginswithnumber ! Tests that the variable name cannot begin with a number

end program parameternamebeginswithnumber

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer :: 1y, 0, 0, fail-final

    integer, intent(in) :: z

end subroutine

program defaultvalueisvariablestartingwithnumber ! Tests that the default value cannot be set to an invalid variable name

end program defaultvalueisvariablestartingwithnumber

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer :: y, 0, 1defval, fail-final

    integer, intent(in) :: z

end subroutine

program defaultvalueisrealforinteger ! Tests that an integer cannot be given a real default value.

end program defaultvalueisrealforinteger

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer :: y, 0, 1.7, fail-final

    integer, intent(in) :: z

end subroutine

program updatecallsite ! Tests that the call site is updated appropriately - basic.

    implicit none

    call sub(2)

end program updatecallsite

subroutine sub(z) !<<<<< 5, 1, 5, 5, integer; intent(in) :: y, 0, 0, pass

    integer, intent(in) :: z

end subroutine

program updatecallsite ! Tests that the call site is updated appropriately - basic.

    implicit none

    call sub(0,2)

end program updatecallsite

subroutine sub(y,z) !<<<<< 5, 1, 5, 5, integer; intent(in) :: y, 0, 0, pass

    integer, intent(in) :: y

    integer, intent(in) :: z

end subroutine

program defaultvalueisnumberfornonnumbertype ! Tests that non number types cannot be given a number as a default value.

end program defaultvalueisnumberfornonnumbertype

subroutine sub(z) !<<<<< 4, 1, 4, 5, logical :: y, 0, 1, fail-final

    integer, intent(in) :: z

end subroutine

program defaultvalueisnullfornonpointer ! Tests that null cannot be the default value for a non pointer

end program defaultvalueisnullfornonpointer

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer :: y, 0, null, fail-final

    integer, intent(in) :: z

end subroutine

program basicpointer ! Tests that pointers can be passed as a parameter.

end program basicpointer

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in); pointer :: y, 0, null, pass

    integer, intent(in) :: z

end subroutine

program basicpointer ! Tests that pointers can be passed as a parameter.

end program basicpointer

subroutine sub(y,z) !<<<<< 4, 1, 4, 5, integer; intent(in); pointer :: y, 0, null, pass

    integer, intent(in), pointer :: y

    integer, intent(in) :: z

end subroutine

program updatecallsitewithorder ! Tests that the position of the parameter is correctly set.

    implicit none

    call sub(2)

end program updatecallsitewithorder

subroutine sub(z) !<<<<< 5, 1, 5, 5, integer; intent(in) :: y, 1, 0, pass

    integer, intent(in) :: z

end subroutine

program updatecallsitewithorder ! Tests that the position of the parameter is correctly set.

    implicit none

    call sub(2,0)

end program updatecallsitewithorder

subroutine sub(z,y) !<<<<< 5, 1, 5, 5, integer; intent(in) :: y, 1, 0, pass

    integer, intent(in) :: y

    integer, intent(in) :: z

end subroutine

program negativeposition ! Tests that the refactoring fails with negative positions requested.

end program negativeposition

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in) :: y, -1, 0, fail-final

    integer, intent(in) :: z

end subroutine

program outofbounds ! Tests that the refactoring fails for requests to place the new parameter in a position that is out of bounds.

end program outofbounds

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in) :: y, 3, 0, fail-final

    integer, intent(in) :: z

end subroutine

program whitespacedefaultvalue ! Tests that the refactoring does not allow the default value to be white space

end program whitespacedefaultvalue

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in) :: y, 0,    	, fail-final

    integer, intent(in) :: z

end subroutine

program basicarray ! Tests that arrays can be passed.

end program basicarray

subroutine sub(z) !<<<<< 4, 1, 4, 5, integer; intent(in); dimension(2) :: y, 0, (/ 2; 3 /), pass

    integer, intent(in) :: z

end subroutine

program basicarray ! Tests that arrays can be passed.

end program basicarray

subroutine sub(y,z) !<<<<< 4, 1, 4, 5, integer; intent(in); dimension(2) :: y, 0, (/ 2; 3 /), pass

    integer, intent(in), dimension(2) :: y

    integer, intent(in) :: z

end subroutine

program logicalbasic ! Tests that logical parameters work correctly.

end program logicalbasic

subroutine sub(z) !<<<<< 4, 1, 4, 5, logical; intent(in) :: y, 0, .true., pass

    integer, intent(in) :: z

end subroutine

program logicalbasic ! Tests that logical parameters work correctly.

end program logicalbasic

subroutine sub(y,z) !<<<<< 4, 1, 4, 5, logical; intent(in) :: y, 0, .true., pass

    logical, intent(in) :: y

    integer, intent(in) :: z

end subroutine

program dontsetvariabletype ! Tests that the default variable type is set to real

end program dontsetvariabletype

subroutine sub(z) !<<<<< 4, 1, 4, 5, intent(in) :: y, 0, 3, pass

    integer, intent(in) :: z

end subroutine

program dontsetvariabletype ! Tests that the default variable type is set to real

end program dontsetvariabletype

subroutine sub(y,z) !<<<<< 4, 1, 4, 5, intent(in) :: y, 0, 3, pass

    real, intent(in) :: y

    integer, intent(in) :: z

end subroutine

/*******************************************************************************

 * Copyright (c) 2010 University of Illinois at Urbana-Champaign and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *    UIUC - Initial API and implementation

 *******************************************************************************/

package org.eclipse.photran.internal.tests.refactoring;

import junit.framework.Test;

import org.eclipse.core.resources.IFile;

import org.eclipse.jface.text.TextSelection;

import org.eclipse.photran.internal.core.refactoring.AddSubroutineParameterRefactoring;

import org.eclipse.photran.internal.tests.Activator;

import org.eclipse.photran.internal.tests.PhotranRefactoringTestSuiteFromMarkers;

/**

 * 

 * @author Marc Celani, Joe Handzik, Joe Gonzalez, Jason Patel

 */

public class AddSubroutineParameterTestSuite extends

    PhotranRefactoringTestSuiteFromMarkers<AddSubroutineParameterRefactoring>

{

    private static final String DIR = "refactoring-test-code/add-subroutine-parameter";

    public static Test suite() throws Exception

    {

        return new AddSubroutineParameterTestSuite();

    }

    public AddSubroutineParameterTestSuite() throws Exception

    {

        super(Activator.getDefault(),

              "Running Add Subroutine Parameter refactoring in",

              DIR,

              AddSubroutineParameterRefactoring.class);

    }

    @Override

    protected boolean configureRefactoring(AddSubroutineParameterRefactoring refactoring,

                                           IFile file,

                                           TextSelection selection,

                                           String[] markerText)

    {

        boolean shouldSucceed = super.configureRefactoring(refactoring, file, selection, markerText);

        refactoring.setDeclaration(markerText[4].replaceAll(";", ","));

        refactoring.setPosition(Integer.parseInt(markerText[5]));

        if (!markerText[6].equals("_dont_call"))

            refactoring.setDefaultValue(markerText[6]);

        return shouldSucceed;

    }

}

command.name.21 = Add Subroutine Parameter...

action.label.21 = Add Subrouti&ne Parameter...

        <editorRefactoring command="org.eclipse.photran.ui.AddSubroutineParameterRefactoringCommand" />

      <command

            name="%command.name.21"

            categoryId="org.eclipse.photran.ui.RefactoringCategory"

            id="org.eclipse.photran.ui.AddSubroutineParameterRefactoringCommand">

      </command>

        <key

            sequence="M3+M2+T"

            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"

            contextId="org.eclipse.photran.ui.FortranEditorContext"

            commandId="org.eclipse.photran.ui.AddSubroutineParameterRefactoringCommand"

     />

         <action

               label="%action.label.21"

               definitionId="org.eclipse.photran.ui.AddSubroutineParameterRefactoringCommand"

               class="org.eclipse.photran.internal.ui.refactoring.AddSubroutineParameterAction"

               id="org.eclipse.photran.ui.AddSubroutineParameterRefactoringAction"/>

/*******************************************************************************

 * Copyright (c) 2007, 2009 University of Illinois at Urbana-Champaign and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *     UIUC - Initial API and implementation

 *******************************************************************************/

package org.eclipse.photran.internal.ui.refactoring;

import java.util.List;

import org.eclipse.core.resources.IFile;

import org.eclipse.ltk.ui.refactoring.UserInputWizardPage;

import org.eclipse.photran.core.IFortranAST;

import org.eclipse.photran.internal.core.lexer.Token;

import org.eclipse.photran.internal.core.parser.ASTSubroutineParNode;

import org.eclipse.photran.internal.core.refactoring.AddSubroutineParameterRefactoring;

import org.eclipse.photran.internal.core.vpg.PhotranVPG;

import org.eclipse.rephraserengine.core.vpg.refactoring.VPGRefactoring;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.TableColumn;

import org.eclipse.swt.widgets.TableItem;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.IEditorActionDelegate;

import org.eclipse.ui.IWorkbenchWindowActionDelegate;

/**

 * Handles the Add Subroutine Parameter action in the Fortran editor's Refactoring popup menu and in

 * the Refactor menu in the workbench menu bar.

 * 

 * @author Joe Handzik, Joe Gonzales, Marc Celani, Jason Patel

 */

public class AddSubroutineParameterAction extends AbstractFortranRefactoringActionDelegate

    implements IWorkbenchWindowActionDelegate, IEditorActionDelegate

{

    public AddSubroutineParameterAction()

    {

        super(AddSubroutineParameterRefactoring.class,

            FortranAddSubroutineParameterRefactoringWizard.class);

    }

    @Override

    protected VPGRefactoring<IFortranAST, Token, PhotranVPG> getRefactoring(List<IFile> files)

    {

        AddSubroutineParameterRefactoring r = new AddSubroutineParameterRefactoring();

        r.initialize(getFortranEditor().getIFile(), getFortranEditor().getSelection());

        return r;

    }

    public static class FortranAddSubroutineParameterRefactoringWizard extends

        AbstractFortranRefactoringWizard

    {

        protected AddSubroutineParameterRefactoring addSubRefactoring;

        public FortranAddSubroutineParameterRefactoringWizard(AddSubroutineParameterRefactoring r)

        {

            super(r);

            this.addSubRefactoring = r;

        }

        @Override

        protected void doAddUserInputPages()

        {

            addPage(new UserInputWizardPage(addSubRefactoring.getName())

            {

                protected Text declField;

                protected Text locationField;

                protected Text defaultField;

                public void createControl(Composite parent)

                {

                    Composite group = new Composite(parent, SWT.NONE);

                    initializeDialogUnits(group);

                    setControl(group);

                    group.setLayout(new GridLayout(3, false));

                    GridData threeCol = new GridData();

                    threeCol.horizontalSpan = 3;

                    Label lbl = new Label(group, SWT.NONE);

                    lbl.setText(Messages.AddSubroutineParameterAction_DeclarationLabel);

                    Label lbl3 = new Label(group, SWT.NONE);

                    lbl3.setText(Messages.AddSubroutineParameterAction_DefaultLabel);

                    Label lbl2 = new Label(group, SWT.NONE);

                    lbl2.setText(Messages.AddSubroutineParameterAction_LocationLabel);

                    declField = new Text(group, SWT.BORDER);

                    declField.setText(addSubRefactoring.getDeclaration());

                    declField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

                    declField.selectAll();

                    declField.addModifyListener(new ModifyListener()

                    {

                        public void modifyText(ModifyEvent e)

                        {

                            addSubRefactoring.setDeclaration(declField.getText());

                        }

                    });

                    defaultField = new Text(group, SWT.BORDER);

                    defaultField.setText(addSubRefactoring.getDefault());

                    defaultField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

                    defaultField.selectAll();

                    defaultField.addModifyListener(new ModifyListener()

                    {

                        public void modifyText(ModifyEvent e)

                        {

                            addSubRefactoring.setDefaultValue(defaultField.getText());

                        }

                    });

                    locationField = new Text(group, SWT.BORDER);

                    locationField.setText(String.valueOf(addSubRefactoring.getPosition()));

                    locationField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

                    locationField.selectAll();

                    locationField.addModifyListener(new ModifyListener()

                    {

                        public void modifyText(ModifyEvent e)

                        {

                            addSubRefactoring.setPosition(Integer.parseInt(locationField.getText()));

                        }

                    });

                    //creates the table that lists the variables that exist in the subroutine

                    List<ASTSubroutineParNode> parList = addSubRefactoring.getOldParameterList();

                    GridData gridData = new GridData(GridData.VERTICAL_ALIGN_END);

                    gridData.horizontalSpan = 3;

                    gridData.horizontalAlignment = GridData.FILL;

                    Table table = new Table (group, SWT.BORDER );

                    table.setLinesVisible (true);

                    table.setHeaderVisible (true);

                    table.setLayoutData(gridData);

                    for (int i = 0; i < parList.size(); i++){

                        TableColumn column = new TableColumn (table, SWT.NONE);

                        column.setText (String.valueOf(i));

                    }   

                    TableItem item = new TableItem (table, SWT.NONE);

                    for (int i = 0; i < parList.size(); i++){               

                        item.setText (i, parList.get(i).getVariableName().getText());

                    }

                    for (int i=0; i<parList.size(); i++) {

                        table.getColumn (i).pack ();

                    }   

                    // Call once for sure, just in case the user doesn't modify the text

                    // addSubRefactoring.setDeclaration(declField.getText());

                    int offset = declField.getText().indexOf(":: "); //$NON-NLS-1$

                    if (offset < 0)

                        offset = 0;

                    else

                        offset = offset + ":: ".length(); //$NON-NLS-1$

                    declField.setSelection(offset, declField.getText().length());

                    declField.setFocus();

                }

            });

        }

    }

}

    public static String AddSubroutineParameterAction_DefaultLabel;

    public static String AddSubroutineParameterAction_DeclarationLabel;

    //public static String AddSubroutineParameterAction_DeclarationLabel;

    public static String AddSubroutineParameterAction_LocationLabel;

AddSubroutineParameterAction_DeclarationLabel=Declaration:

AddSubroutineParameterAction_LocationLabel=Position:

AddSubroutineParameterAction_DefaultLabel=Default Value: