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import java.io.BufferedReader;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintStream;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.apache.tools.ant.BuildException;

import org.apache.tools.ant.Task;

/**

* Ant Task for copying the PImage and PGraphics methods into PApplet.

public class PAppletMethods extends Task {

private File baseDir;

private boolean includeRecorder;

public PAppletMethods() {

}

public void setDir(String dir) {

baseDir = new File(dir);

}

public void setRecorder(boolean rec) {

includeRecorder = rec;

}

public void execute() throws BuildException {

// Do a bunch of checks...

if (baseDir == null) {

throw new BuildException("dir parameter must be set!");

}

//System.out.println("using basedir " + baseDir);

File graphicsFile = new File(baseDir, "PGraphics.java");

File appletFile = new File(baseDir, "PApplet.java");

File imageFile = new File(baseDir, "PImage.java");

if (!graphicsFile.exists() || !graphicsFile.canRead()) {

throw new BuildException("PGraphics file not readable: " +

graphicsFile.getAbsolutePath());

}

if (!appletFile.exists() ||

!appletFile.canRead() ||

!appletFile.canWrite()) {

throw new BuildException("PApplet file not read/writeable: " +

appletFile.getAbsolutePath());

}

if (!imageFile.exists() || !imageFile.canRead()) {

throw new BuildException("PImage file not readable: " +

imageFile.getAbsolutePath());

}

// Looking good, let's do this!

//ByteArrayOutputStream outBytes = new ByteArrayOutputStream();

//PrintStream out = new PrintStream(outBytes, "UTF-8");

StringBuilder out = new StringBuilder();

StringBuilder content = new StringBuilder();

try{

BufferedReader applet = createReader(appletFile);

String line;

while ((line = applet.readLine()) != null) {

out.append(line);

out.append('\n'); // to avoid Windows CRs

content.append(line);

content.append('\n'); // for efficiency

if (line.indexOf("public functions for processing.core") >= 0) {

break;

}

// read the rest of the file and append it to the

while ((line = applet.readLine()) != null) {

content.append(line);

content.append('\n');

}

applet.close();

process(out, graphicsFile);

process(out, imageFile);

out.append('}');

out.append('\n');

//} catch (IOException e) {

//e.printStackTrace();

} catch (Exception e) {

//ex.printStackTrace();

throw new BuildException(e);

}

//out.flush();

String outString = out.toString();

if (content.toString().equals(outString)) {

System.out.println("No changes to PApplet API.");

} else {

System.out.println("Updating PApplet with API changes " +

"from PImage or PGraphics.");

try {

PrintStream temp = new PrintStream(appletFile, "UTF-8");

temp.print(outString);

temp.flush();

temp.close();

} catch (IOException e) {

//e.printStackTrace();

throw new BuildException(e);

}

private void process(StringBuilder out, File input) throws IOException {

BufferedReader in = createReader(input);

int comments = 0;

String line = null;

StringBuilder commentBuffer = new StringBuilder();

while ((line = in.readLine()) != null) {

String decl = "";

// Keep track of comments

//if (line.matches(Pattern.quote("/*"))) {

if (line.indexOf("/*") != -1) {

comments++;

}

//if (line.matches(Pattern.quote("*/"))) {

if (line.indexOf("*/") != -1) {

commentBuffer.append(line);

commentBuffer.append('\n');

//System.out.println("comment is: " + commentBuffer.toString());

comments--;

// otherwise gotSomething will be false, and nuke the comment

continue;

}

// Ignore everything inside comments

if (comments > 0) {

commentBuffer.append(line);

commentBuffer.append('\n');

continue;

}

boolean gotSomething = false;

boolean gotStatic = false;

Matcher result;

if ((result = Pattern.compile("^\\s*public ([\\w\\[\\]]+) [a-zA-z_]+\\(.*$").matcher(line)).matches()) {

gotSomething = true;

} else if ((result = Pattern.compile("^\\s*abstract public ([\\w\\[\\]]+) [a-zA-z_]+\\(.*$").matcher(line)).matches()) {

gotSomething = true;

} else if ((result = Pattern.compile("^\\s*public final ([\\w\\[\\]]+) [a-zA-z_]+\\(.*$").matcher(line)).matches()) {

gotSomething = true;

} else if ((result = Pattern.compile("^\\s*static public ([\\w\\[\\]]+) [a-zA-z_]+\\(.*$").matcher(line)).matches()) {

gotSomething = true;

gotStatic = true;

}

// if function is marked "// ignore" then, uh, ignore it.

if (gotSomething && line.indexOf("// ignore") >= 0) {

gotSomething = false;

}

String returns = "";

if (gotSomething) {

if (result.group(1).equals("void")) {

returns = "";

} else {

returns = "return ";

}

// remove the abstract modifier

line = line.replaceFirst(Pattern.quote("abstract"), " ");

// replace semicolons with a start def

line = line.replaceAll(Pattern.quote(";"), " {\n");

//out.println("\n\n" + line);

out.append('\n');

// end has its own newline

//out.print(commentBuffer.toString()); // TODO disabled for now XXXX

out.append(commentBuffer.toString()); // duplicates all comments

commentBuffer.setLength(0);

out.append(line);

out.append('\n');

decl += line;

while(line.indexOf(')') == -1) {

line = in.readLine();

decl += line;

line = line.replaceAll("\\;\\s*$", " {\n");

out.append(line);

out.append('\n');

}

result = Pattern.compile(".*?\\s(\\S+)\\(.*?").matcher(decl);

// try to match. don't remove this or things will stop working!

result.matches();

String declName = result.group(1);

String gline = "";

String rline = "";

if (gotStatic) {

gline = " " + returns + "PGraphics." + declName + "(";

} else {

rline = " if (recorder != null) recorder." + declName + "(";

gline = " " + returns + "g." + declName + "(";

}

decl = decl.replaceAll("\\s+", " "); // smush onto a single line

decl = decl.replaceFirst("^.*\\(", "");

decl = decl.replaceFirst("\\).*$", "");

int prev = 0;

String parts[] = decl.split("\\, ");

for (String part : parts) {

if (!part.trim().equals("")) {

String blargh[] = part.split(" ");

String theArg = blargh[1].replaceAll("[\\[\\]]", "");

if (prev != 0) {

gline += ", ";

rline += ", ";

}

gline += theArg;

rline += theArg;

prev = 1;

}

gline += ");";

rline += ");";

if (!gotStatic && returns.equals("") && includeRecorder) {

out.append(rline);

out.append('\n');

}

out.append(gline);

out.append('\n');

out.append(" }");

out.append('\n');

} else {

commentBuffer.setLength(0);

}

in.close();

}

static BufferedReader createReader(File file) throws IOException {

FileInputStream fis = new FileInputStream(file);

return new BufferedReader(new InputStreamReader(fis, "UTF-8"));

}

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