001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2016 the original author or authors.
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018////////////////////////////////////////////////////////////////////////////////
019
020package com.puppycrawl.tools.checkstyle.gui;
021
022import java.util.List;
023
024import com.google.common.collect.ImmutableList;
025import com.puppycrawl.tools.checkstyle.api.DetailAST;
026import com.puppycrawl.tools.checkstyle.utils.TokenUtils;
027
028/**
029 * Presentation model for CodeSelector.
030 * @author unknown
031 */
032public class CodeSelectorPModel {
033    /** DetailAST node. */
034    private final DetailAST ast;
035    /** Mapping. */
036    private final List<Integer> lines2position;
037    /** Selection start position. */
038    private int selectionStart;
039    /** Selection end position. */
040    private int selectionEnd;
041
042    /**
043     * Constructor.
044     * @param ast ast node.
045     * @param lines2position list to map lines.
046     */
047    public CodeSelectorPModel(DetailAST ast, List<Integer> lines2position) {
048        this.ast = ast;
049        this.lines2position = ImmutableList.copyOf(lines2position);
050    }
051
052    /**
053     * @return selection start position.
054     */
055    public int getSelectionStart() {
056        return selectionStart;
057    }
058
059    /**
060     * @return selection end position.
061     */
062    public int getSelectionEnd() {
063        return selectionEnd;
064    }
065
066    /**
067     * Find start and end selection positions from AST line and Column.
068     */
069    public void findSelectionPositions() {
070        selectionStart = lines2position.get(ast.getLineNo()) + ast.getColumnNo();
071
072        if (ast.getChildCount() == 0
073                && TokenUtils.getTokenName(ast.getType()).equals(ast.getText())) {
074            selectionEnd = selectionStart;
075        }
076        else {
077            selectionEnd = findLastPosition(ast);
078        }
079    }
080
081    /**
082     * Finds the last position of node without children.
083     * @param astNode DetailAST node.
084     * @return Last position of node without children.
085     */
086    private int findLastPosition(final DetailAST astNode) {
087        if (astNode.getChildCount() == 0) {
088            return lines2position.get(astNode.getLineNo()) + astNode.getColumnNo()
089                    + astNode.getText().length();
090        }
091        else {
092            return findLastPosition(astNode.getLastChild());
093        }
094    }
095}