package org.farng.mp3.lyrics3;
import org.farng.mp3.InvalidTagException;
import org.farng.mp3.TagConstant;
import org.farng.mp3.TagOptionSingleton;
import org.farng.mp3.object.ObjectLyrics3Image;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.Iterator;
/**
* Link to an image files (BMP or JPG format). Image lines include filename, description and timestamp separated by
* delimiter - two ASCII chars 124 ("||"). Description and timestamp are optional, but if timestamp is used, and there
* is no description, two delimiters ("||||") should be used between the filename and the timestamp. Multiple images are
* allowed by using a [CR][LF] delimiter between each image line. No [CR][LF] is needed after the last image line.
* Number of images is not limited (except by the field size).<BR><B>Filename</B> can be in one of these formats: <UL>
* <LI>Filename only - when the image is located in the same path as the MP3 file (preferred, since if you move the mp3
* file this will still be correct) <LI>Relative Path + Filename - when the image is located in a subdirectory below the
* MP3 file (i.e. images\cover.jpg) <LI>Full path + Filename - when the image is located in a totally different path or
* drive. This will not work if the image is moved or drive letters has changed, and so should be avoided if possible
* (i.e. c:\images\artist.jpg)</LI></UL><B>Description</B> can be up to 250 chars long.<BR><B>Timestamp</B> must be
* formatted like the lyrics timestamp which is "[mm:ss]". If an image has a timestamp, then the visible image will
* automatically switch to that image on the timestamp play time, just the same as the selected lyrics line is switched
* based on timestamps.
*
* @author Eric Farng
* @version $Revision: 1.4 $
*/
public class FieldBodyIMG extends AbstractLyrics3v2FieldBody {
private ArrayList images = new ArrayList();
/**
* Creates a new FieldBodyIMG object.
*/
public FieldBodyIMG() {
super();
}
/**
* Creates a new FieldBodyIMG object.
*/
public FieldBodyIMG(final FieldBodyIMG copyObject) {
super(copyObject);
ObjectLyrics3Image oldObject;
for (int i = 0; i < copyObject.images.size(); i++) {
oldObject = (ObjectLyrics3Image) copyObject.images.get(i);
this.images.add(new ObjectLyrics3Image(oldObject));
}
}
/**
* Creates a new FieldBodyIMG object.
*/
public FieldBodyIMG(final String imageString) {
readString(imageString);
}
/**
* Creates a new FieldBodyIMG object.
*/
public FieldBodyIMG(final ObjectLyrics3Image image) {
this.images.add(image);
}
/**
* Creates a new FieldBodyIMG object.
*/
public FieldBodyIMG(final RandomAccessFile file) throws InvalidTagException, java.io.IOException {
this.read(file);
}
public String getIdentifier() {
return "IMG";
}
public int getSize() {
int size = 0;
ObjectLyrics3Image image;
for (int i = 0; i < this.images.size(); i++) {
image = (ObjectLyrics3Image) this.images.get(i);
size += (image.getSize() + 2); // add CRLF pair
}
return size - 2; // cut off trailing crlf pair
}
public boolean isSubsetOf(final Object object) {
if ((object instanceof FieldBodyIMG) == false) {
return false;
}
final ArrayList superset = ((FieldBodyIMG) object).images;
for (int i = 0; i < this.images.size(); i++) {
if (superset.contains(this.images.get(i)) == false) {
return false;
}
}
return super.isSubsetOf(object);
}
public void setValue(final String value) {
readString(value);
}
public String getValue() {
return writeString();
}
public void addImage(final ObjectLyrics3Image image) {
this.images.add(image);
}
public boolean equals(final Object obj) {
if ((obj instanceof FieldBodyIMG) == false) {
return false;
}
final FieldBodyIMG fieldBodyIMG = (FieldBodyIMG) obj;
if (this.images.equals(fieldBodyIMG.images) == false) {
return false;
}
return super.equals(obj);
}
public Iterator iterator() {
return this.images.iterator();
}
protected void setupObjectList() {
// throw new UnsupportedOperationException();
}
public void read(final RandomAccessFile file) throws InvalidTagException, java.io.IOException {
final String imageString;
byte[] buffer = new byte[5];
// read the 5 character size
file.read(buffer, 0, 5);
final int size = Integer.parseInt(new String(buffer, 0, 5));
if ((size == 0) && (TagOptionSingleton.getInstance().isLyrics3KeepEmptyFieldIfRead() == false)) {
throw new InvalidTagException("Lyircs3v2 Field has size of zero.");
}
buffer = new byte[size];
// read the SIZE length description
file.read(buffer);
imageString = new String(buffer);
readString(imageString);
}
public String toString() {
String str = getIdentifier() + " : ";
for (int i = 0; i < this.images.size(); i++) {
str += (this.images.get(i).toString() + " ; ");
}
return str;
}
public void write(final RandomAccessFile file) throws java.io.IOException {
final int size;
int offset = 0;
byte[] buffer = new byte[5];
String str;
size = getSize();
str = Integer.toString(size);
for (int i = 0; i < (5 - str.length()); i++) {
buffer[i] = (byte) '0';
}
offset += (5 - str.length());
for (int i = 0; i < str.length(); i++) {
buffer[i + offset] = (byte) str.charAt(i);
}
offset += str.length();
file.write(buffer, 0, 5);
if (size > 0) {
str = writeString();
buffer = new byte[str.length()];
for (int i = 0; i < str.length(); i++) {
buffer[i] = (byte) str.charAt(i);
}
file.write(buffer);
}
}
/**
* @param imageString
*/
private void readString(final String imageString) {
// now read each picture and put in the vector;
ObjectLyrics3Image image;
String token;
int offset = 0;
int delim = imageString.indexOf(TagConstant.SEPERATOR_LINE);
this.images = new ArrayList();
while (delim >= 0) {
token = imageString.substring(offset, delim);
image = new ObjectLyrics3Image("Image");
image.setFilename(token);
this.images.add(image);
offset = delim + TagConstant.SEPERATOR_LINE.length();
delim = imageString.indexOf(TagConstant.SEPERATOR_LINE, offset);
}
if (offset < imageString.length()) {
token = imageString.substring(offset);
image = new ObjectLyrics3Image("Image");
image.setFilename(token);
this.images.add(image);
}
}
private String writeString() {
String str = "";
ObjectLyrics3Image image;
for (int i = 0; i < this.images.size(); i++) {
image = (ObjectLyrics3Image) this.images.get(i);
str += (image.writeString() + TagConstant.SEPERATOR_LINE);
}
if (str.length() > 2) {
return str.substring(0, str.length() - 2);
}
return str;
}
}