////////////////////////////////////////////////////////////////////////////////

 // checkstyle: Checks Java source code for adherence to a set of rules.

 // Copyright (C) 2001-2014  Oliver Burn

 //

 // This library is free software; you can redistribute it and/or

 // modify it under the terms of the GNU Lesser General Public

 // License as published by the Free Software Foundation; either

 // version 2.1 of the License, or (at your option) any later version.

 //

 // This library 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

 // Lesser General Public License for more details.

 //

 // You should have received a copy of the GNU Lesser General Public

 // License along with this library; if not, write to the Free Software

 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 ////////////////////////////////////////////////////////////////////////////////

 package com.puppycrawl.tools.checkstyle.checks.indentation;

 import com.puppycrawl.tools.checkstyle.api.DetailAST;

 import com.puppycrawl.tools.checkstyle.api.TokenTypes;

 /**

  * Handler for method calls.

  *

  * @author jrichard

  */

 public class MethodCallHandler extends ExpressionHandler

 {

     /**

      * Construct an instance of this handler with the given indentation check,

      * abstract syntax tree, and parent handler.

      *

      * @param aIndentCheck   the indentation check

      * @param aAST           the abstract syntax tree

      * @param aParent        the parent handler

      */

     public MethodCallHandler(IndentationCheck aIndentCheck,

         DetailAST aAST, ExpressionHandler aParent)

     {

         super(aIndentCheck,

             aAST.getType() == TokenTypes.METHOD_CALL

                 ? "method call" : "ctor call",

             aAST,

             aParent);

     }

     @Override

     protected IndentLevel getLevelImpl()

     {

         // if inside a method call's params, this could be part of

         // an expression, so get the previous line's start

         if (getParent() instanceof MethodCallHandler) {

             final MethodCallHandler container =

                 ((MethodCallHandler) getParent());

             if (container != null) {

                 if (areOnSameLine(container.getMainAst(), getMainAst())) {

                     return container.getLevel();

                 }

                 // we should increase indentation only if this is the first

                 // chained method call which was moved to the next line

                 final DetailAST main = getMainAst();

                 final DetailAST dot = main.getFirstChild();

                 final DetailAST target = dot.getFirstChild();

                 if ((dot.getType() == TokenTypes.DOT)

                     && (target.getType() == TokenTypes.METHOD_CALL))

                 {

                     final DetailAST dot1 = target.getFirstChild();

                     final DetailAST target1 = dot1.getFirstChild();

                     if ((dot1.getType() == TokenTypes.DOT)

                         && (target1.getType() == TokenTypes.METHOD_CALL))

                     {

                         return container.getLevel();

                     }

                 }

                 return new IndentLevel(container.getLevel(), getBasicOffset());

             }

             // if we get here, we are the child of the left hand side (name

             //  side) of a method call with no "containing" call, use

             //  the first non-method call parent

             ExpressionHandler p = getParent();

             while (p instanceof MethodCallHandler) {

                 p = p.getParent();

             }

             return p.suggestedChildLevel(this);

         }

         // if our expression isn't first on the line, just use the start

         // of the line

         final LineSet lines = new LineSet();

         findSubtreeLines(lines, getMainAst().getFirstChild(), true);

         final int firstCol = lines.firstLineCol();

         final int lineStart = getLineStart(getFirstAst(getMainAst()));

         if (lineStart != firstCol) {

             return new IndentLevel(lineStart);

         }

         return super.getLevelImpl();

     }

     /**

      * Get the first AST of the specified method call.

      *

      * @param aAst

      *            the method call

      *

      * @return the first AST of the specified method call

      */

     private DetailAST getFirstAst(DetailAST aAst)

     {

         // walk down the first child part of the dots that make up a method

         // call name

         DetailAST ast = aAst.getFirstChild();

         while ((ast != null) && (ast.getType() == TokenTypes.DOT)) {

             ast = ast.getFirstChild();

         }

         if (ast == null) {

             ast = aAst;

         }

         return ast;

     }

     @Override

     public IndentLevel suggestedChildLevel(ExpressionHandler aChild)

     {

         // for whatever reason a method that crosses lines, like asList

         // here:

         //            System.out.println("methods are: " + Arrays.asList(

         //                new String[] {"method"}).toString());

         // will not have the right line num, so just get the child name

         final DetailAST first = getMainAst().getFirstChild();

         int indentLevel = getLineStart(first);

         if (!areOnSameLine(aChild.getMainAst().getFirstChild(),

                            getMainAst().getFirstChild()))

         {

             indentLevel += getBasicOffset();

         }

         return new IndentLevel(indentLevel);

     }

     @Override

     public void checkIndentation()

     {

         final DetailAST methodName = getMainAst().getFirstChild();

         checkExpressionSubtree(methodName, getLevel(), false, false);

         final DetailAST lparen = getMainAst();

         final DetailAST rparen = getMainAst().findFirstToken(TokenTypes.RPAREN);

         checkLParen(lparen);

         if (rparen.getLineNo() == lparen.getLineNo()) {

             return;

         }

         // if this method name is on the same line as a containing

         // method, don't indent, this allows expressions like:

         //    method("my str" + method2(

         //        "my str2"));

         // as well as

         //    method("my str" +

         //        method2(

         //            "my str2"));

         //

         checkExpressionSubtree(

             getMainAst().findFirstToken(TokenTypes.ELIST),

             new IndentLevel(getLevel(), getBasicOffset()),

             false, true);

         checkRParen(lparen, rparen);

     }

     @Override

     protected boolean shouldIncreaseIndent()

     {

         return false;

     }

 }