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PlantUML is a component that allows to quickly write diagrams from text.
The newest version!
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
* https://plantuml.com/patreon (only 1$ per month!)
* https://plantuml.com/liberapay (only 1€ per month!)
* https://plantuml.com/paypal
*
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the Apache Software License.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* PlantUML can occasionally display sponsored or advertising messages. Those
* messages are usually generated on welcome or error images and never on
* functional diagrams.
* See https://plantuml.com/professional if you want to remove them
*
* Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
* are owned by the author of their corresponding sources code (that is, their
* textual description in PlantUML language). Those images are not covered by
* this APACHE license.
*
* The generated images can then be used without any reference to the APACHE license.
* It is not even necessary to stipulate that they have been generated with PlantUML,
* although this will be appreciated by the PlantUML team.
*
* There is an exception : if the textual description in PlantUML language is also covered
* by any license, then the generated images are logically covered
* by the very same license.
*
* This is the IGY distribution (Install GraphViz by Yourself).
* You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
* (see https://plantuml.com/graphviz-dot )
*
* Icons provided by OpenIconic : https://useiconic.com/open
* Archimate sprites provided by Archi : http://www.archimatetool.com
* Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
* Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
* ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
* ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
* CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
* Brotli (c) by the Brotli Authors https://github.com/google/brotli
* Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
* Twemoji (c) by Twitter at https://twemoji.twitter.com/
*
*/
package org.stathissideris.ascii2image.text;
import java.awt.Color;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Stack;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.stathissideris.ascii2image.core.ProcessingOptions;
/**
*
* @author Efstathios Sideris
*/
public class TextGrid {
private static final boolean DEBUG = false;
private ArrayList rows;
private static char[] boundaries = {'/', '\\', '|', '-', '*', '=', ':'};
private static char[] undisputableBoundaries = {'|', '-', '*', '=', ':'};
private static char[] horizontalLines = {'-', '='};
private static char[] verticalLines = {'|', ':'};
private static char[] arrowHeads = {'<', '>', '^', 'v', 'V'};
private static char[] cornerChars = {'\\', '/', '+'};
private static char[] pointMarkers = {'*'};
private static char[] dashedLines = {':', '~', '='};
private static char[] entryPoints1 = {'\\'};
private static char[] entryPoints2 = {'|', ':', '+', '\\', '/'};
private static char[] entryPoints3 = {'/'};
private static char[] entryPoints4 = {'-', '=', '+', '\\', '/'};
private static char[] entryPoints5 = {'\\'};
private static char[] entryPoints6 = {'|', ':', '+', '\\', '/'};
private static char[] entryPoints7 = {'/'};
private static char[] entryPoints8 = {'-', '=', '+', '\\', '/'};
private static HashMap humanColorCodes = new HashMap();
static {
humanColorCodes.put("GRE", "9D9");
humanColorCodes.put("BLU", "55B");
humanColorCodes.put("PNK", "FAA");
humanColorCodes.put("RED", "E32");
humanColorCodes.put("YEL", "FF3");
humanColorCodes.put("BLK", "000");
}
private static HashSet markupTags =
new HashSet();
static {
markupTags.add("d");
markupTags.add("s");
markupTags.add("io");
markupTags.add("c");
markupTags.add("mo");
markupTags.add("tr");
markupTags.add("o");
}
public void addToMarkupTags(Collection tags){
markupTags.addAll(tags);
}
public TextGrid(){
rows = new ArrayList();
}
public TextGrid(int width, int height){
String space = StringUtils.repeatString(" ", width);
rows = new ArrayList();
for(int i = 0; i < height; i++)
rows.add(new StringBuffer(space));
}
public static TextGrid makeSameSizeAs(TextGrid grid){
return new TextGrid(grid.getWidth(), grid.getHeight());
}
public TextGrid(TextGrid otherGrid){
rows = new ArrayList();
for(StringBuffer row : otherGrid.getRows()) {
rows.add(new StringBuffer(row));
}
}
public void clear(){
String blank = StringUtils.repeatString(" ", getWidth());
int height = getHeight();
rows.clear();
for(int i = 0; i < height; i++)
rows.add(new StringBuffer(blank));
}
// duplicated code due to lots of hits to this function
public char get(int x, int y){
if(x > getWidth() - 1
|| y > getHeight() - 1
|| x < 0
|| y < 0) return 0;
return rows.get(y).charAt(x);
}
//duplicated code due to lots of hits to this function
public char get(Cell cell){
if(cell.x > getWidth() - 1
|| cell.y > getHeight() - 1
|| cell.x < 0
|| cell.y < 0) return 0;
return rows.get(cell.y).charAt(cell.x);
}
public StringBuffer getRow(int y){
return rows.get(y);
}
public TextGrid getSubGrid(int x, int y, int width, int height){
TextGrid grid = new TextGrid(width, height);
for(int i = 0; i < height; i++){
grid.setRow(i, new StringBuffer(getRow(y + i).subSequence(x, x + width)));
}
return grid;
}
public TextGrid getTestingSubGrid(Cell cell){
return getSubGrid(cell.x - 1, cell.y - 1, 3, 3);
}
public String getStringAt(int x, int y, int length){
return getStringAt(new Cell(x, y), length);
}
public String getStringAt(Cell cell, int length){
int x = cell.x;
int y = cell.y;
if(x > getWidth() - 1
|| y > getHeight() - 1
|| x < 0
|| y < 0) return null;
return rows.get(y).substring(x, x + length);
}
public char getNorthOf(int x, int y){ return get(x, y - 1); }
public char getSouthOf(int x, int y){ return get(x, y + 1); }
public char getEastOf(int x, int y){ return get(x + 1, y); }
public char getWestOf(int x, int y){ return get(x - 1, y); }
public char getNorthOf(Cell cell){ return getNorthOf(cell.x, cell.y); }
public char getSouthOf(Cell cell){ return getSouthOf(cell.x, cell.y); }
public char getEastOf(Cell cell){ return getEastOf(cell.x, cell.y); }
public char getWestOf(Cell cell){ return getWestOf(cell.x, cell.y); }
public void writeStringTo(int x, int y, String str){
writeStringTo(new Cell(x, y), str);
}
public void writeStringTo(Cell cell, String str){
if(isOutOfBounds(cell)) return;
rows.get(cell.y).replace(cell.x, cell.x + str.length(), str);
}
public void set(Cell cell, char c){
set(cell.x, cell.y, c);
}
public void set(int x, int y, char c){
if(x > getWidth() - 1 || y > getHeight() - 1) return;
StringBuffer row = rows.get(y);
row.setCharAt(x, c);
}
public void setRow(int y, String row){
if(y > getHeight() || row.length() != getWidth())
throw new IllegalArgumentException("setRow out of bounds or string wrong size");
rows.set(y, new StringBuffer(row));
}
public void setRow(int y, StringBuffer row){
if(y > getHeight() || row.length() != getWidth())
throw new IllegalArgumentException("setRow out of bounds or string wrong size");
rows.set(y, row);
}
public int getWidth(){
if(rows.size() == 0) return 0; //empty buffer
return rows.get(0).length();
}
public int getHeight(){
return rows.size();
}
public void printDebug(){
Iterator it = rows.iterator();
int i = 0;
System.out.println(
" "
+StringUtils.repeatString("0123456789", (int) Math.floor(getWidth()/10)+1));
while(it.hasNext()){
String row = it.next().toString();
String index = Integer.valueOf(i).toString();
if(i < 10) index = " "+index;
System.out.println(index+" ("+row+")");
i++;
}
}
public String getDebugString(){
StringBuffer buffer = new StringBuffer();
Iterator it = rows.iterator();
int i = 0;
buffer.append(
" "
+StringUtils.repeatString("0123456789", (int) Math.floor(getWidth()/10)+1)+"\n");
while(it.hasNext()){
String row = it.next().toString();
String index = Integer.valueOf(i).toString();
if(i < 10) index = " "+index;
row = row.replaceAll("\n", "\\\\n");
row = row.replaceAll("\r", "\\\\r");
buffer.append(index+" ("+row+")\n");
i++;
}
return buffer.toString();
}
public String toString(){
return getDebugString();
}
/**
* Adds grid to this. Space characters in this grid
* are replaced with the corresponding contents of
* grid, otherwise the contents are unchanged.
*
* @param grid
* @return false if the grids are of different size
*/
public boolean add(TextGrid grid){
if(getWidth() != grid.getWidth()
|| getHeight() != grid.getHeight()) return false;
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
if(get(xi, yi) == ' ') set(xi, yi, grid.get(xi, yi));
}
}
return true;
}
/**
* Replaces letters or numbers that are on horizontal or vertical
* lines, with the appropriate character that will make the line
* continuous (| for vertical and - for horizontal lines)
*
*/
public void replaceTypeOnLine(){
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
char c = get(xi, yi);
if(Character.isLetterOrDigit(c)) {
boolean isOnHorizontalLine = isOnHorizontalLine(xi, yi);
boolean isOnVerticalLine = isOnVerticalLine(xi, yi);
if(isOnHorizontalLine && isOnVerticalLine){
set(xi, yi, '+');
if(DEBUG) System.out.println("replaced type on line '"+c+"' with +");
} else if(isOnHorizontalLine){
set(xi, yi, '-');
if(DEBUG) System.out.println("replaced type on line '"+c+"' with -");
} else if(isOnVerticalLine){
set(xi, yi, '|');
if(DEBUG) System.out.println("replaced type on line '"+c+"' with |");
}
}
}
}
}
public void replacePointMarkersOnLine(){
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
char c = get(xi, yi);
Cell cell = new Cell(xi, yi);
if(StringUtils.isOneOf(c, pointMarkers)
&& isStarOnLine(cell)){
boolean isOnHorizontalLine = false;
if(StringUtils.isOneOf(get(cell.getEast()), horizontalLines))
isOnHorizontalLine = true;
if(StringUtils.isOneOf(get(cell.getWest()), horizontalLines))
isOnHorizontalLine = true;
boolean isOnVerticalLine = false;
if(StringUtils.isOneOf(get(cell.getNorth()), verticalLines))
isOnVerticalLine = true;
if(StringUtils.isOneOf(get(cell.getSouth()), verticalLines))
isOnVerticalLine = true;
if(isOnHorizontalLine && isOnVerticalLine){
set(xi, yi, '+');
if(DEBUG) System.out.println("replaced marker on line '"+c+"' with +");
} else if(isOnHorizontalLine){
set(xi, yi, '-');
if(DEBUG) System.out.println("replaced marker on line '"+c+"' with -");
} else if(isOnVerticalLine){
set(xi, yi, '|');
if(DEBUG) System.out.println("replaced marker on line '"+c+"' with |");
}
}
}
}
}
public CellSet getPointMarkersOnLine(){
CellSet result = new CellSet();
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
char c = get(xi, yi);
if(StringUtils.isOneOf(c, pointMarkers)
&& isStarOnLine(new Cell(xi, yi))){
result.add(new Cell(xi, yi));
}
}
}
return result;
}
public void replaceHumanColorCodes(){
int height = getHeight();
for(int y = 0; y < height; y++){
String row = rows.get(y).toString();
Iterator it = humanColorCodes.keySet().iterator();
while(it.hasNext()){
String humanCode = (String) it.next();
String hexCode = (String) humanColorCodes.get(humanCode);
if(hexCode != null){
humanCode = "c" + humanCode;
hexCode = "c" + hexCode;
row = row.replaceAll(humanCode, hexCode);
rows.set(y, new StringBuffer(row)); //TODO: this is not the most efficient way to do this
row = rows.get(y).toString();
}
}
}
}
/**
* Replace all occurences of c1 with c2
*
* @param c1
* @param c2
*/
public void replaceAll(char c1, char c2){
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
char c = get(xi, yi);
if(c == c1) set(xi, yi, c2);
}
}
}
public boolean hasBlankCells(){
CellSet set = new CellSet();
int width = getWidth();
int height = getHeight();
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
Cell cell = new Cell(x, y);
if(isBlank(cell)) return true;
}
}
return false;
}
public CellSet getAllNonBlank(){
CellSet set = new CellSet();
int width = getWidth();
int height = getHeight();
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
Cell cell = new Cell(x, y);
if(!isBlank(cell)) set.add(cell);
}
}
return set;
}
public CellSet getAllBoundaries(){
CellSet set = new CellSet();
int width = getWidth();
int height = getHeight();
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
Cell cell = new Cell(x, y);
if(isBoundary(cell)) set.add(cell);
}
}
return set;
}
public CellSet getAllBlanksBetweenCharacters(){
CellSet set = new CellSet();
int width = getWidth();
int height = getHeight();
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
Cell cell = new Cell(x, y);
if(isBlankBetweenCharacters(cell)) set.add(cell);
}
}
return set;
}
/**
* Returns an ArrayList of CellStringPairs that
* represents all the continuous (non-blank) Strings
* in the grid. Used on buffers that contain only
* type, in order to find the positions and the
* contents of the strings.
*
* @return
*/
public ArrayList findStrings(){
ArrayList result = new ArrayList();
int width = getWidth();
int height = getHeight();
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
if(!isBlank(x, y)){
Cell start = new Cell(x, y);
String str = String.valueOf(get(x,y));
char c = get(++x, y);
boolean finished = false;
//while(c != ' '){
while(!finished){
str += String.valueOf(c);
c = get(++x, y);
char next = get(x + 1, y);
if((c == ' ' || c == 0) && (next == ' ' || next == 0))
finished = true;
}
result.add(new CellStringPair(start, str));
}
}
}
return result;
}
/**
* This is done in a bit of a messy way, should be impossible
* to go out of sync with corresponding GridPatternGroup.
*
* @param cell
* @param entryPointId
* @return
*/
public boolean hasEntryPoint(Cell cell, int entryPointId){
String result = "";
char c = get(cell);
if(entryPointId == 1) {
return StringUtils.isOneOf(c, entryPoints1);
} else if(entryPointId == 2) {
return StringUtils.isOneOf(c, entryPoints2);
} else if(entryPointId == 3) {
return StringUtils.isOneOf(c, entryPoints3);
} else if(entryPointId == 4) {
return StringUtils.isOneOf(c, entryPoints4);
} else if(entryPointId == 5) {
return StringUtils.isOneOf(c, entryPoints5);
} else if(entryPointId == 6) {
return StringUtils.isOneOf(c, entryPoints6);
} else if(entryPointId == 7) {
return StringUtils.isOneOf(c, entryPoints7);
} else if(entryPointId == 8) {
return StringUtils.isOneOf(c, entryPoints8);
}
return false;
}
/**
* true if cell is blank and the east and west cells are not
* (used to find gaps between words)
*
* @param cell
* @return
*/
public boolean isBlankBetweenCharacters(Cell cell){
return (isBlank(cell)
&& !isBlank(cell.getEast())
&& !isBlank(cell.getWest()));
}
/**
* Makes blank all the cells that contain non-text
* elements.
*/
public void removeNonText(){
//the following order is significant
//since the south-pointing arrowheads
//are determined based on the surrounding boundaries
removeArrowheads();
removeColorCodes();
removeBoundaries();
removeMarkupTags();
}
public void removeArrowheads(){
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
Cell cell = new Cell(xi, yi);
if(isArrowhead(cell)) set(cell, ' ');
}
}
}
public void removeColorCodes(){
Iterator cells = findColorCodes().iterator();
while(cells.hasNext()){
Cell cell = ((CellColorPair) cells.next()).cell;
set(cell, ' ');
cell = cell.getEast(); set(cell, ' ');
cell = cell.getEast(); set(cell, ' ');
cell = cell.getEast(); set(cell, ' ');
}
}
public void removeBoundaries(){
ArrayList toBeRemoved = new ArrayList();
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
Cell cell = new Cell(xi, yi);
if(isBoundary(cell)) toBeRemoved.add(cell);
}
}
//remove in two stages, because decision of
//isBoundary depends on contants of surrounding
//cells
Iterator it = toBeRemoved.iterator();
while(it.hasNext()){
Cell cell = (Cell) it.next();
set(cell, ' ');
}
}
public ArrayList findArrowheads(){
ArrayList result = new ArrayList();
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
Cell cell = new Cell(xi, yi);
if(isArrowhead(cell)) result.add(cell);
}
}
if(DEBUG) System.out.println(result.size()+" arrowheads found");
return result;
}
public ArrayList findColorCodes(){
Pattern colorCodePattern = Pattern.compile("c[A-F0-9]{3}");
ArrayList result = new ArrayList();
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width - 3; xi++){
Cell cell = new Cell(xi, yi);
String s = getStringAt(cell, 4);
Matcher matcher = colorCodePattern.matcher(s);
if(matcher.matches()){
char cR = s.charAt(1);
char cG = s.charAt(2);
char cB = s.charAt(3);
int r = Integer.valueOf(String.valueOf(cR), 16) * 17;
int g = Integer.valueOf(String.valueOf(cG), 16) * 17;
int b = Integer.valueOf(String.valueOf(cB), 16) * 17;
result.add(new CellColorPair(cell, new Color(r, g, b)));
}
}
}
if(DEBUG) System.out.println(result.size()+" color codes found");
return result;
}
public ArrayList findMarkupTags(){
Pattern tagPattern = Pattern.compile("\\{(.+?)\\}");
ArrayList result = new ArrayList();
int width = getWidth();
int height = getHeight();
for(int y = 0; y < height; y++){
for(int x = 0; x < width - 3; x++){
Cell cell = new Cell(x, y);
char c = get(cell);
if(c == '{'){
String rowPart = rows.get(y).substring(x);
Matcher matcher = tagPattern.matcher(rowPart);
if(matcher.find()){
String tagName = matcher.group(1);
if(markupTags.contains(tagName)){
if(DEBUG) System.out.println("found tag "+tagName+" at "+x+", "+y);
result.add(new CellTagPair(new Cell(x, y), tagName));
}
}
}
}
}
return result;
}
public void removeMarkupTags(){
Iterator it = findMarkupTags().iterator();
while (it.hasNext()) {
CellTagPair pair = (CellTagPair) it.next();
String tagName = pair.tag;
if(tagName == null) continue;
int length = 2 + tagName.length();
writeStringTo(pair.cell, StringUtils.repeatString(" ", length));
}
}
public boolean matchesAny(GridPatternGroup criteria){
return criteria.isAnyMatchedBy(this);
}
public boolean matchesAll(GridPatternGroup criteria){
return criteria.areAllMatchedBy(this);
}
public boolean matches(GridPattern criteria){
return criteria.isMatchedBy(this);
}
public boolean isOnHorizontalLine(Cell cell){ return isOnHorizontalLine(cell.x, cell.y); }
private boolean isOnHorizontalLine(int x, int y){
char c1 = get(x - 1, y);
char c2 = get(x + 1, y);
if(isHorizontalLine(c1) && isHorizontalLine(c2)) return true;
return false;
}
public boolean isOnVerticalLine(Cell cell){ return isOnVerticalLine(cell.x, cell.y); }
private boolean isOnVerticalLine(int x, int y){
char c1 = get(x, y - 1);
char c2 = get(x, y + 1);
if(isVerticalLine(c1) && isVerticalLine(c2)) return true;
return false;
}
public static boolean isBoundary(char c){
return StringUtils.isOneOf(c, boundaries);
}
public boolean isBoundary(int x, int y){ return isBoundary(new Cell(x, y)); }
public boolean isBoundary(Cell cell){
char c = get(cell.x, cell.y);
if(0 == c) return false;
if('+' == c || '\\' == c || '/' == c){
// System.out.print("");
if(
isIntersection(cell)
|| isCorner(cell)
|| isStub(cell)
|| isCrossOnLine(cell)){
return true;
} else return false;
}
//return StringUtils.isOneOf(c, undisputableBoundaries);
if(StringUtils.isOneOf(c, boundaries) && !isLoneDiagonal(cell)){
return true;
}
return false;
}
public boolean isLine(Cell cell){
return isHorizontalLine(cell) || isVerticalLine(cell);
}
public static boolean isHorizontalLine(char c){
return StringUtils.isOneOf(c, horizontalLines);
}
public boolean isHorizontalLine(Cell cell){ return isHorizontalLine(cell.x, cell.y); }
public boolean isHorizontalLine(int x, int y){
char c = get(x, y);
if(0 == c) return false;
return StringUtils.isOneOf(c, horizontalLines);
}
public static boolean isVerticalLine(char c){
return StringUtils.isOneOf(c, verticalLines);
}
public boolean isVerticalLine(Cell cell){ return isVerticalLine(cell.x, cell.y); }
public boolean isVerticalLine(int x, int y){
char c = get(x, y);
if(0 == c) return false;
return StringUtils.isOneOf(c, verticalLines);
}
public boolean isLinesEnd(int x, int y){
return isLinesEnd(new Cell(x, y));
}
/**
* Stubs are also considered end of lines
*
* @param cell
* @return
*/
public boolean isLinesEnd(Cell cell){
return matchesAny(cell, GridPatternGroup.linesEndCriteria);
}
public boolean isVerticalLinesEnd(Cell cell){
return matchesAny(cell, GridPatternGroup.verticalLinesEndCriteria);
}
public boolean isHorizontalLinesEnd(Cell cell){
return matchesAny(cell, GridPatternGroup.horizontalLinesEndCriteria);
}
public boolean isPointCell(Cell cell){
return (
isCorner(cell)
|| isIntersection(cell)
|| isStub(cell)
|| isLinesEnd(cell));
}
public boolean containsAtLeastOneDashedLine(CellSet set){
Iterator it = set.iterator();
while(it.hasNext()) {
Cell cell = (Cell) it.next();
if(StringUtils.isOneOf(get(cell), dashedLines)) return true;
}
return false;
}
public boolean exactlyOneNeighbourIsBoundary(Cell cell) {
int howMany = 0;
if(isBoundary(cell.getNorth())) howMany++;
if(isBoundary(cell.getSouth())) howMany++;
if(isBoundary(cell.getEast())) howMany++;
if(isBoundary(cell.getWest())) howMany++;
return (howMany == 1);
}
/**
*
* A stub looks like that:
*
*
*
* +- or -+ or + or + or /- or -/ or / (you get the point)
* | | |
*
*
*
* @param cell
* @return
*/
public boolean isStub(Cell cell){
return matchesAny(cell, GridPatternGroup.stubCriteria);
}
public boolean isCrossOnLine(Cell cell){
return matchesAny(cell, GridPatternGroup.crossOnLineCriteria);
}
public boolean isHorizontalCrossOnLine(Cell cell){
return matchesAny(cell, GridPatternGroup.horizontalCrossOnLineCriteria);
}
public boolean isVerticalCrossOnLine(Cell cell){
return matchesAny(cell, GridPatternGroup.verticalCrossOnLineCriteria);
}
public boolean isStarOnLine(Cell cell){
return matchesAny(cell, GridPatternGroup.starOnLineCriteria);
}
public boolean isLoneDiagonal(Cell cell){
return matchesAny(cell, GridPatternGroup.loneDiagonalCriteria);
}
public boolean isHorizontalStarOnLine(Cell cell){
return matchesAny(cell, GridPatternGroup.horizontalStarOnLineCriteria);
}
public boolean isVerticalStarOnLine(Cell cell){
return matchesAny(cell, GridPatternGroup.verticalStarOnLineCriteria);
}
public boolean isArrowhead(Cell cell){
return (isNorthArrowhead(cell)
|| isSouthArrowhead(cell)
|| isWestArrowhead(cell)
|| isEastArrowhead(cell));
}
public boolean isNorthArrowhead(Cell cell){
return get(cell) == '^';
}
public boolean isEastArrowhead(Cell cell){
return get(cell) == '>';
}
public boolean isWestArrowhead(Cell cell){
return get(cell) == '<';
}
public boolean isSouthArrowhead(Cell cell){
return (get(cell) == 'v' || get(cell) == 'V')
&& isVerticalLine(cell.getNorth());
}
// unicode for bullets
//
// 2022 bullet
// 25CF black circle
// 25AA black circle (small)
// 25A0 black square
// 25A1 white square
// 25CB white circle
// 25BA black right-pointing pointer
public boolean isBullet(int x, int y){
return isBullet(new Cell(x, y));
}
public boolean isBullet(Cell cell){
char c = get(cell);
if((c == 'o' || c == '*')
&& isBlank(cell.getEast())
&& isBlank(cell.getWest())
&& Character.isLetterOrDigit(get(cell.getEast().getEast())) )
return true;
return false;
}
public void replaceBullets(){
int width = getWidth();
int height = getHeight();
for(int yi = 0; yi < height; yi++){
for(int xi = 0; xi < width; xi++){
Cell cell = new Cell(xi, yi);
if(isBullet(cell)){
set(cell, ' ');
set(cell.getEast(), '\u2022');
}
}
}
}
/**
* true if the cell is not blank
* but the previous (west) is
*
* @param cell
* @return
*/
public boolean isStringsStart(Cell cell){
return (!isBlank(cell) && isBlank(cell.getWest()));
}
/**
* true if the cell is not blank
* but the next (east) is
*
* @param cell
* @return
*/
public boolean isStringsEnd(Cell cell){
return (!isBlank(cell)
//&& (isBlank(cell.getEast()) || get(cell.getEast()) == 0));
&& isBlank(cell.getEast()));
}
public int otherStringsStartInTheSameColumn(Cell cell){
if(!isStringsStart(cell)) return 0;
int result = 0;
int height = getHeight();
for(int y = 0; y < height; y++){
Cell cCell = new Cell(cell.x, y);
if(!cCell.equals(cell) && isStringsStart(cCell)){
result++;
}
}
return result;
}
public int otherStringsEndInTheSameColumn(Cell cell){
if(!isStringsEnd(cell)) return 0;
int result = 0;
int height = getHeight();
for(int y = 0; y < height; y++){
Cell cCell = new Cell(cell.x, y);
if(!cCell.equals(cell) && isStringsEnd(cCell)){
result++;
}
}
return result;
}
public boolean isColumnBlank(int x){
int height = getHeight();
for(int y = 0; y < height; y++){
if(!isBlank(x, y)) return false;
}
return true;
}
public CellSet followLine(int x, int y){
return followLine(new Cell(x, y));
}
public CellSet followIntersection(Cell cell){
return followIntersection(cell, null);
}
public CellSet followIntersection(Cell cell, Cell blocked){
if(!isIntersection(cell)) return null;
CellSet result = new CellSet();
Cell cN = cell.getNorth();
Cell cS = cell.getSouth();
Cell cE = cell.getEast();
Cell cW = cell.getWest();
if(hasEntryPoint(cN, 6)) result.add(cN);
if(hasEntryPoint(cS, 2)) result.add(cS);
if(hasEntryPoint(cE, 8)) result.add(cE);
if(hasEntryPoint(cW, 4)) result.add(cW);
if(result.contains(blocked)) result.remove(blocked);
return result;
}
/**
* Returns the neighbours of a line-cell that are boundaries
* (0 to 2 cells are returned)
*
* @param cell
* @return null if the cell is not a line
*/
public CellSet followLine(Cell cell){
if(isHorizontalLine(cell)){
CellSet result = new CellSet();
if(isBoundary(cell.getEast())) result.add(cell.getEast());
if(isBoundary(cell.getWest())) result.add(cell.getWest());
return result;
} else if (isVerticalLine(cell)){
CellSet result = new CellSet();
if(isBoundary(cell.getNorth())) result.add(cell.getNorth());
if(isBoundary(cell.getSouth())) result.add(cell.getSouth());
return result;
}
return null;
}
public CellSet followLine(Cell cell, Cell blocked){
CellSet nextCells = followLine(cell);
if(nextCells.contains(blocked)) nextCells.remove(blocked);
return nextCells;
}
public CellSet followCorner(Cell cell){
return followCorner(cell, null);
}
public CellSet followCorner(Cell cell, Cell blocked){
if(!isCorner(cell)) return null;
if(isCorner1(cell)) return followCorner1(cell, blocked);
if(isCorner2(cell)) return followCorner2(cell, blocked);
if(isCorner3(cell)) return followCorner3(cell, blocked);
if(isCorner4(cell)) return followCorner4(cell, blocked);
return null;
}
public CellSet followCorner1(Cell cell){
return followCorner1(cell, null);
}
public CellSet followCorner1(Cell cell, Cell blocked){
if(!isCorner1(cell)) return null;
CellSet result = new CellSet();
if(!cell.getSouth().equals(blocked)) result.add(cell.getSouth());
if(!cell.getEast().equals(blocked)) result.add(cell.getEast());
return result;
}
public CellSet followCorner2(Cell cell){
return followCorner2(cell, null);
}
public CellSet followCorner2(Cell cell, Cell blocked){
if(!isCorner2(cell)) return null;
CellSet result = new CellSet();
if(!cell.getSouth().equals(blocked)) result.add(cell.getSouth());
if(!cell.getWest().equals(blocked)) result.add(cell.getWest());
return result;
}
public CellSet followCorner3(Cell cell){
return followCorner3(cell, null);
}
public CellSet followCorner3(Cell cell, Cell blocked){
if(!isCorner3(cell)) return null;
CellSet result = new CellSet();
if(!cell.getNorth().equals(blocked)) result.add(cell.getNorth());
if(!cell.getWest().equals(blocked)) result.add(cell.getWest());
return result;
}
public CellSet followCorner4(Cell cell){
return followCorner4(cell, null);
}
public CellSet followCorner4(Cell cell, Cell blocked){
if(!isCorner4(cell)) return null;
CellSet result = new CellSet();
if(!cell.getNorth().equals(blocked)) result.add(cell.getNorth());
if(!cell.getEast().equals(blocked)) result.add(cell.getEast());
return result;
}
public CellSet followStub(Cell cell){
return followStub(cell, null);
}
public CellSet followStub(Cell cell, Cell blocked){
if(!isStub(cell)) return null;
CellSet result = new CellSet();
if(isBoundary(cell.getEast())) result.add(cell.getEast());
else if(isBoundary(cell.getWest())) result.add(cell.getWest());
else if(isBoundary(cell.getNorth())) result.add(cell.getNorth());
else if(isBoundary(cell.getSouth())) result.add(cell.getSouth());
if(result.contains(blocked)) result.remove(blocked);
return result;
}
public CellSet followCell(Cell cell){
return followCell(cell, null);
}
public CellSet followCell(Cell cell, Cell blocked){
if(isIntersection(cell)) return followIntersection(cell, blocked);
if(isCorner(cell)) return followCorner(cell, blocked);
if(isLine(cell)) return followLine(cell, blocked);
if(isStub(cell)) return followStub(cell, blocked);
if(isCrossOnLine(cell)) return followCrossOnLine(cell, blocked);
System.err.println("Umbiguous input at position "+cell+":");
TextGrid subGrid = getTestingSubGrid(cell);
subGrid.printDebug();
throw new RuntimeException("Cannot follow cell "+cell+": cannot determine cell type");
}
public String getCellTypeAsString(Cell cell){
if(isK(cell)) return "K";
if(isT(cell)) return "T";
if(isInverseK(cell)) return "inverse K";
if(isInverseT(cell)) return "inverse T";
if(isCorner1(cell)) return "corner 1";
if(isCorner2(cell)) return "corner 2";
if(isCorner3(cell)) return "corner 3";
if(isCorner4(cell)) return "corner 4";
if(isLine(cell)) return "line";
if(isStub(cell)) return "stub";
if(isCrossOnLine(cell)) return "crossOnLine";
return "unrecognisable type";
}
public CellSet followCrossOnLine(Cell cell, Cell blocked){
CellSet result = new CellSet();
if(isHorizontalCrossOnLine(cell)){
result.add(cell.getEast());
result.add(cell.getWest());
} else if(isVerticalCrossOnLine(cell)){
result.add(cell.getNorth());
result.add(cell.getSouth());
}
if(result.contains(blocked)) result.remove(blocked);
return result;
}
public boolean isOutOfBounds(Cell cell){
if(cell.x > getWidth() - 1
|| cell.y > getHeight() - 1
|| cell.x < 0
|| cell.y < 0) return true;
return false;
}
public boolean isOutOfBounds(int x, int y){
char c = get(x, y);
if(0 == c) return true;
return false;
}
public boolean isBlank(Cell cell){
char c = get(cell);
if(0 == c) return false;
return c == ' ';
}
public boolean isBlank(int x, int y){
char c = get(x, y);
if(0 == c) return true;
return c == ' ';
}
public boolean isCorner(Cell cell){
return isCorner(cell.x, cell.y);
}
public boolean isCorner(int x, int y){
return (isNormalCorner(x,y) || isRoundCorner(x,y));
}
public boolean matchesAny(Cell cell, GridPatternGroup criteria){
TextGrid subGrid = getTestingSubGrid(cell);
return subGrid.matchesAny(criteria);
}
public boolean isCorner1(Cell cell){
return matchesAny(cell, GridPatternGroup.corner1Criteria);
}
public boolean isCorner2(Cell cell){
return matchesAny(cell, GridPatternGroup.corner2Criteria);
}
public boolean isCorner3(Cell cell){
return matchesAny(cell, GridPatternGroup.corner3Criteria);
}
public boolean isCorner4(Cell cell){
return matchesAny(cell, GridPatternGroup.corner4Criteria);
}
public boolean isCross(Cell cell){
return matchesAny(cell, GridPatternGroup.crossCriteria);
}
public boolean isK(Cell cell){
return matchesAny(cell, GridPatternGroup.KCriteria);
}
public boolean isInverseK(Cell cell){
return matchesAny(cell, GridPatternGroup.inverseKCriteria);
}
public boolean isT(Cell cell){
return matchesAny(cell, GridPatternGroup.TCriteria);
}
public boolean isInverseT(Cell cell){
return matchesAny(cell, GridPatternGroup.inverseTCriteria);
}
public boolean isNormalCorner(Cell cell){
return matchesAny(cell, GridPatternGroup.normalCornerCriteria);
}
public boolean isNormalCorner(int x, int y){
return isNormalCorner(new Cell(x, y));
}
public boolean isRoundCorner(Cell cell){
return matchesAny(cell, GridPatternGroup.roundCornerCriteria);
}
public boolean isRoundCorner(int x, int y){
return isRoundCorner(new Cell(x, y));
}
public boolean isIntersection(Cell cell){
return matchesAny(cell, GridPatternGroup.intersectionCriteria);
}
public boolean isIntersection(int x, int y){
return isIntersection(new Cell(x, y));
}
public void copyCellsTo(CellSet cells, TextGrid grid){
Iterator it = cells.iterator();
while(it.hasNext()){
Cell cell = (Cell) it.next();
grid.set(cell, this.get(cell));
}
}
public boolean equals(TextGrid grid){
if(grid.getHeight() != this.getHeight()
|| grid.getWidth() != this.getWidth()
){
return false;
}
int height = grid.getHeight();
for(int i = 0; i < height; i++){
String row1 = this.getRow(i).toString();
String row2 = grid.getRow(i).toString();
if(!row1.equals(row2)) return false;
}
return true;
}
// @Override
// public int hashCode() {
// int h = 0;
// for(StringBuffer row : rows) {
// h += row.hashCode();
// }
// return h;
// }
/**
* Fills all the cells in cells with c
*
* @param cells
* @param c
*/
public void fillCellsWith(Iterable cells, char c){
Iterator it = cells.iterator();
while(it.hasNext()){
Cell cell = it.next();
set(cell.x, cell.y, c);
}
}
/*
*
* Fills the continuous area with if c1 characters with c2,
* flooding from cell x, y
*
* @param x
* @param y
* @param c1 the character to replace
* @param c2 the character to replace c1 with
* @return the list of cells filled
*/
// public CellSet fillContinuousArea(int x, int y, char c1, char c2){
// CellSet cells = new CellSet();
// //fillContinuousArea_internal(x, y, c1, c2, cells);
// seedFill(new Cell(x, y), c1, c2);
// return cells;
// }
public CellSet fillContinuousArea(int x, int y, char c){
return fillContinuousArea(new Cell(x, y), c);
}
public CellSet fillContinuousArea(Cell cell, char c){
if(isOutOfBounds(cell)) throw new IllegalArgumentException("Attempted to fill area out of bounds: "+cell);
return seedFillOld(cell, c);
}
private CellSet seedFill(Cell seed, char newChar){
CellSet cellsFilled = new CellSet();
char oldChar = get(seed);
if(oldChar == newChar) return cellsFilled;
if(isOutOfBounds(seed)) return cellsFilled;
Stack stack = new Stack();
stack.push(seed);
while(!stack.isEmpty()){
Cell cell = (Cell) stack.pop();
//set(cell, newChar);
cellsFilled.add(cell);
Cell nCell = cell.getNorth();
Cell sCell = cell.getSouth();
Cell eCell = cell.getEast();
Cell wCell = cell.getWest();
if(get(nCell) == oldChar && !cellsFilled.contains(nCell)) stack.push(nCell);
if(get(sCell) == oldChar && !cellsFilled.contains(sCell)) stack.push(sCell);
if(get(eCell) == oldChar && !cellsFilled.contains(eCell)) stack.push(eCell);
if(get(wCell) == oldChar && !cellsFilled.contains(wCell)) stack.push(wCell);
}
return cellsFilled;
}
private CellSet seedFillOld(Cell seed, char newChar){
CellSet cellsFilled = new CellSet();
char oldChar = get(seed);
if(oldChar == newChar) return cellsFilled;
if(isOutOfBounds(seed)) return cellsFilled;
Stack stack = new Stack();
stack.push(seed);
while(!stack.isEmpty()){
Cell cell = (Cell) stack.pop();
set(cell, newChar);
cellsFilled.add(cell);
Cell nCell = cell.getNorth();
Cell sCell = cell.getSouth();
Cell eCell = cell.getEast();
Cell wCell = cell.getWest();
if(get(nCell) == oldChar) stack.push(nCell);
if(get(sCell) == oldChar) stack.push(sCell);
if(get(eCell) == oldChar) stack.push(eCell);
if(get(wCell) == oldChar) stack.push(wCell);
}
return cellsFilled;
}
/**
*
* Locates and returns the '*' boundaries that we would
* encounter if we did a flood-fill at seed.
*
* @param seed
* @return
*/
public CellSet findBoundariesExpandingFrom(Cell seed){
CellSet boundaries = new CellSet();
char oldChar = get(seed);
if(isOutOfBounds(seed)) return boundaries;
char newChar = 1; //TODO: kludge
Stack stack = new Stack();
stack.push(seed);
while(!stack.isEmpty()){
Cell cell = (Cell) stack.pop();
set(cell, newChar);
Cell nCell = cell.getNorth();
Cell sCell = cell.getSouth();
Cell eCell = cell.getEast();
Cell wCell = cell.getWest();
if(get(nCell) == oldChar) stack.push(nCell);
else if(get(nCell) == '*') boundaries.add(nCell);
if(get(sCell) == oldChar) stack.push(sCell);
else if(get(sCell) == '*') boundaries.add(sCell);
if(get(eCell) == oldChar) stack.push(eCell);
else if(get(eCell) == '*') boundaries.add(eCell);
if(get(wCell) == oldChar) stack.push(wCell);
else if(get(wCell) == '*') boundaries.add(wCell);
}
return boundaries;
}
//TODO: incomplete method seedFillLine()
private CellSet seedFillLine(Cell cell, char newChar){
CellSet cellsFilled = new CellSet();
Stack stack = new Stack();
char oldChar = get(cell);
if(oldChar == newChar) return cellsFilled;
if(isOutOfBounds(cell)) return cellsFilled;
stack.push(new LineSegment(cell.x, cell.x, cell.y, 1));
stack.push(new LineSegment(cell.x, cell.x, cell.y + 1, -1));
int left;
while(!stack.isEmpty()){
LineSegment segment = (LineSegment) stack.pop();
int x;
//expand to the left
for(
x = segment.x1;
x >= 0 && get(x, segment.y) == oldChar;
--x){
set(x, segment.y, newChar);
cellsFilled.add(new Cell(x, segment.y));
}
left = cell.getEast().x;
boolean skip = (x > segment.x1)? true : false;
if(left < segment.x1){ //leak on left?
//TODO: i think the first param should be x
stack.push(
//new LineSegment(segment.y, left, segment.x1 - 1, -segment.dy));
new LineSegment(x, left, segment.y - 1, -segment.dy));
}
x = segment.x1 + 1;
do {
if(!skip) {
for( ; x < getWidth() && get(x, segment.y) == oldChar; ++x){
set(x, segment.y, newChar);
cellsFilled.add(new Cell(x, segment.y));
}
stack.push(new LineSegment(left, x - 1, segment.y, segment.dy));
if(x > segment.x2 + 1) //leak on right?
stack.push(new LineSegment(segment.x2 + 1, x - 1, segment.y, -segment.dy));
}
skip = false; //skip only once
for(++x; x <= segment.x2 && get(x, segment.y) != oldChar; ++x){;}
left = x;
} while( x < segment.x2);
}
return cellsFilled;
}
public boolean cellContainsDashedLineChar(Cell cell){
char c = get(cell);
return StringUtils.isOneOf(c, dashedLines);
}
public boolean initialiseWithText(String text, ProcessingOptions options) throws UnsupportedEncodingException {
ArrayList lines = new ArrayList();
String[] linesArray = text.split("(\r)?\n");
for(int i = 0; i < linesArray.length; i++)
lines.add(new StringBuffer(linesArray[i]));
return initialiseWithLines(lines, options);
}
public boolean initialiseWithLines(ArrayList lines, ProcessingOptions options) throws UnsupportedEncodingException {
//remove blank rows at the bottom
rows = new ArrayList<>();
for (StringBuffer row:lines) {
if(!StringUtils.isBlank(row.toString()))
rows.add(row);
}
if(options != null) fixTabs(options.getTabSize());
else fixTabs(ProcessingOptions.DEFAULT_TAB_SIZE);
// make all lines of equal length
// add blank outline around the buffer to prevent fill glitch
// convert tabs to spaces (or remove them if setting is 0)
int blankBorderSize = 2;
int maxLength = 0;
int index = 0;
String encoding = null;
//if(options != null) encoding = options.getCharacterEncoding();
Iterator it = rows.iterator();
while(it.hasNext()){
String row = it.next().toString();
if(encoding != null){
byte[] bytes = row.getBytes();
row = new String(bytes, encoding);
}
if(row.length() > maxLength) maxLength = row.length();
rows.set(index, new StringBuffer(row));
index++;
}
it = rows.iterator();
ArrayList newRows = new ArrayList();
//TODO: make the following depend on blankBorderSize
StringBuffer topBottomRow =
new StringBuffer(StringUtils.repeatString(" ", maxLength + blankBorderSize * 2));
newRows.add(topBottomRow);
newRows.add(topBottomRow);
while(it.hasNext()){
StringBuffer row = it.next();
if(row.length() < maxLength) {
String borderString = StringUtils.repeatString(" ", blankBorderSize);
StringBuffer newRow = new StringBuffer();
newRow.append(borderString);
newRow.append(row);
newRow.append(StringUtils.repeatString(" ", maxLength - row.length()));
newRow.append(borderString);
newRows.add(newRow);
} else { //TODO: why is the following line like that?
newRows.add(new StringBuffer(" ").append(row).append(" "));
}
}
//TODO: make the following depend on blankBorderSize
newRows.add(topBottomRow);
newRows.add(topBottomRow);
rows = newRows;
replaceBullets();
replaceHumanColorCodes();
return true;
}
private void fixTabs(int tabSize){
int rowIndex = 0;
Iterator it = rows.iterator();
while(it.hasNext()){
String row = it.next().toString();
StringBuffer newRow = new StringBuffer();
char[] chars = row.toCharArray();
for(int i = 0; i < chars.length; i++){
if(chars[i] == '\t'){
int spacesLeft = tabSize - newRow.length() % tabSize;
if(DEBUG){
System.out.println("Found tab. Spaces left: "+spacesLeft);
}
String spaces = StringUtils.repeatString(" ", spacesLeft);
newRow.append(spaces);
} else {
String character = Character.toString(chars[i]);
newRow.append(character);
}
}
rows.set(rowIndex, newRow);
rowIndex++;
}
}
/**
* @return
*/
protected ArrayList getRows() {
return rows;
}
public class CellColorPair{
public CellColorPair(Cell cell, Color color){
this.cell = cell;
this.color = color;
}
public Color color;
public Cell cell;
}
public class CellStringPair{
public CellStringPair(Cell cell, String string){
this.cell = cell;
this.string = string;
}
public Cell cell;
public String string;
}
public class CellTagPair{
public CellTagPair(Cell cell, String tag){
this.cell = cell;
this.tag = tag;
}
public Cell cell;
public String tag;
}
public class Cell{
public int x, y;
public Cell(Cell cell){
this(cell.x, cell.y);
}
public Cell(int x, int y){
this.x = x;
this.y = y;
}
public Cell getNorth(){ return new Cell(x, y - 1); }
public Cell getSouth(){ return new Cell(x, y + 1); }
public Cell getEast(){ return new Cell(x + 1, y); }
public Cell getWest(){ return new Cell(x - 1, y); }
public Cell getNW(){ return new Cell(x - 1, y - 1); }
public Cell getNE(){ return new Cell(x + 1, y - 1); }
public Cell getSW(){ return new Cell(x - 1, y + 1); }
public Cell getSE(){ return new Cell(x + 1, y + 1); }
public CellSet getNeighbours4(){
CellSet result = new CellSet();
result.add(getNorth());
result.add(getSouth());
result.add(getWest());
result.add(getEast());
return result;
}
public CellSet getNeighbours8(){
CellSet result = new CellSet();
result.add(getNorth());
result.add(getSouth());
result.add(getWest());
result.add(getEast());
result.add(getNW());
result.add(getNE());
result.add(getSW());
result.add(getSE());
return result;
}
public boolean isNorthOf(Cell cell){
if(this.y < cell.y) return true;
return false;
}
public boolean isSouthOf(Cell cell){
if(this.y > cell.y) return true;
return false;
}
public boolean isWestOf(Cell cell){
if(this.x < cell.x) return true;
return false;
}
public boolean isEastOf(Cell cell){
if(this.x > cell.x) return true;
return false;
}
public boolean equals(Object o){
Cell cell = (Cell) o;
if(cell == null) return false;
if(x == cell.x && y == cell.y) return true;
else return false;
}
public int hashCode() {
return (x << 16) | y;
}
public boolean isNextTo(int x2, int y2){
if(Math.abs(x2 - x) == 1 && Math.abs(y2 - y) == 1) return false;
if(Math.abs(x2 - x) == 1 && y2 == y) return true;
if(Math.abs(y2 - y) == 1 && x2 == x) return true;
return false;
}
public boolean isNextTo(Cell cell){
if(cell == null) throw new IllegalArgumentException("cell cannot be null");
return this.isNextTo(cell.x, cell.y);
}
public String toString(){
return "("+x+", "+y+")";
}
public void scale(int s){
x = x * s;
y = y * s;
}
}
private class LineSegment{
int x1, x2, y, dy;
public LineSegment(int x1, int x2, int y, int dy){
this.x1 = x1;
this.x2 = x2;
this.y = y;
this.dy = dy;
}
}
}
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