Editing ray

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/* * Copyright (C) 2007, 2008 Martin Kempf, Reto Kleeb, Michael Klenk * * IFS Institute for Software, HSR Rapperswil, Switzerland * http://ifs.hsr.ch/ * */ package org.codehaus.groovy.eclipse.refactoring.core.utils import org.codehaus.groovy.antlr.*; import org.eclipse.jface.text.*; /** * Reads parts of a file * @author reto kleeb */ class FilePartReader { private static String getLineInFile(filename, line){ File fileObject = openFile(filename) fileObject.readLines().get(line-1) } private static getWords(line, range){ def relevantPieceOfLine = line.getAt(range) relevantPieceOfLine = relevantPieceOfLine.replaceAll(/\(/, " ( ") relevantPieceOfLine = relevantPieceOfLine.replaceAll(/\)/, " ) ") relevantPieceOfLine.tokenize() } public static String readBackwardsFromCoordinate(IDocument doc, LineColumn coord){ //make sure that no one reads from a file with impossible coordinates if(coord.getLine() > 0 && coord.getColumn() > 0) { int lineLength = doc.getLineLength(coord.getLine()-1) int offset = doc.getLineOffset(coord.getLine()-1) String line = doc.get(offset, lineLength) return getWords(line,(0..coord.getColumn()-2))[-1] } else { return " " } } public static String readForwardFromCoordinate(IDocument doc, LineColumn coord){ //make sure that no one reads from a file with impossible coordinates if(coord.getLine() > 0 && coord.getColumn() > 0) { int lineLength = doc.getLineLength(coord.getLine()-1) int offset = doc.getLineOffset(coord.getLine()-1) String line = doc.get(offset, lineLength) return getWords(line,(coord.getColumn()-1..-1))[0] } else { return " " } } /* * DEPRECATED, no filenames anymore public static String readBackwardsFromCoordinate(filename, Coord){ def relevantLine = getLineInFile(filename, Coord.getLine()) return getWords(relevantLine,(0..Coord.getColumn()) )[-1] } public static String readForwardFromCoordinate(filename, Coord){ def relevantLine = getLineInFile(filename, Coord.getLine()) return getWords(relevantLine,(Coord.getColumn()..-1))[0] }*/ private static boolean validateCoords(Top, Bottom){ if(Top.getLine() > Bottom.getLine()) { return false } if(Top.getLine() == Bottom.getLine()){ if(Top.getColumn() >= Bottom.getColumn() ){ return false } } return true } private static File openFile(filename){ File fileObject = new File(filename); if( ! (fileObject.exists() && fileObject.isFile() && fileObject.canRead() && !(fileObject.isDirectory()))){ println "Error Reading File" return null }else{ return fileObject } } public static String readPartsOfAFile(filename, Top, Bottom){ if(!validateCoords(Top, Bottom)){ return "IMPOSSIBLE COORDINATES" } int LineCounter = 0 StringBuilder sb = new StringBuilder() try{ File fileObject = openFile(filename) String LineDelimiter = getLineDelimiter(fileObject) int TopLine = Top.getLine()-1 int BottomLine = Bottom.getLine()-1 def LineArray = fileObject.readLines().getAt(TopLine..BottomLine) LineArray.each{line -> LineCounter++ if(TopLine == BottomLine){ return sb.append(line[Top.getColumn()..Bottom.getColumn()]) } else if(LineCounter == 1){ sb.append(line[Top.getColumn()..-1] + LineDelimiter) } else if(LineCounter == LineArray.size()){ sb.append(line[0..Bottom.getColumn()] + LineDelimiter) return sb } else{ sb.append(line + LineDelimiter) } } } catch(Exception e){ return "Couldn't read file contents at this position" } return sb.toString() } public static final String DEFAULT_LINE_DELIMITER = System.getProperty("line.separator"); public static String getLineDelimiter(File file){ def content = file.getText() def lineDelimiter = DEFAULT_LINE_DELIMITER int index = 0 for (currentChar in content) { if(currentChar == '\r'){ if(content[index+1] == '\n'){ lineDelimiter = "\r\n" break } lineDelimiter = "\r" //mac os 9 break } else if(currentChar == '\n'){ lineDelimiter = "\n" break } index++; } return lineDelimiter; } }

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