ImageSizerpublic class ImageSizer extends Frame
| Fields Summary |
|---|
| TextField | theURL | | TextArea | theOutput | | Button | getURL |
| Constructors Summary |
|---|
public ImageSizer()
setLayout(new BorderLayout());
theURL = new TextField(40);
add("North", theURL);
theOutput = new TextArea(80, 40);
add("Center", theOutput);
add("South", new Button("Get URL"));
|
| Methods Summary |
|---|
| public boolean | action(java.awt.Event e, java.lang.Object o)
if (e.target instanceof Button) {
fixThePage(theURL.getText());
return true;
}
return false;
| | public void | fixThePage(java.lang.String thePage)
String thisLine;
URL root;
if (thePage != null) {
//Open the URL for reading
try {
if (thePage.indexOf(":") != -1) {
root = new URL(thePage);
}
else {
root = new URL("http://" + thePage);
}
sizeAPage(root);
}
catch (MalformedURLException e) {
System.err.println(thePage + " is not a parseable URL");
System.err.println(e);
}
} // end if
| | public boolean | imageUpdate(java.awt.Image img, int infoflags, int x, int y, int width, int height)
if ((infoflags & ImageObserver.HEIGHT) == ImageObserver.HEIGHT &&
(infoflags & ImageObserver.WIDTH) == ImageObserver.WIDTH) {
return false;
}
else {
return true;
}
| | public static void | main(java.lang.String[] args)
ImageSizer is = new ImageSizer();
is.resize(300, 200);
is.show();
| | public java.lang.String | readTag(java.io.DataInputStream is)
StringBuffer theTag = new StringBuffer("<");
char theChar = '<";
try {
while (theChar != '>") {
theChar = (char) is.readByte();
theTag.append(theChar);
} // end while
} // end try
catch (EOFException e) {
// Done with the Stream
}
catch (Exception e) {
System.err.println(e);
}
return theTag.toString();
| | public void | sizeAPage(java.net.URL u)
char thisChar;
String theTag;
try {
DataInputStream theHTML = new DataInputStream(u.openStream());
try {
while (true) {
thisChar = (char) theHTML.readByte();
if (thisChar == '<") {
theTag = readTag(theHTML);
if (theTag.startsWith("<IMG")) {
theTag = sizeImage(u, theTag);
}
theOutput.appendText(theTag);
}
else {
theOutput.appendText(String.valueOf(thisChar));
}
} // end while
} // end try
catch (EOFException e) {
// Done with the Stream
}
} // end try
catch (IOException e) {
System.err.println(e);
}
| | public java.lang.String | sizeImage(java.net.URL u, java.lang.String tag)
String s1 = tag.toUpperCase();
boolean hasHeightTag = s1.indexOf("HEIGHT") != -1;
boolean hasWidthTag = s1.indexOf("WIDTH") != -1;
if (hasHeightTag && hasWidthTag) {
return tag;
}
else {
String newTag;
Image thePicture;
int p1, p2, p3, p4;
p1 = s1.indexOf("SRC");
p2 = s1.indexOf ("=", p1);
p3 = s1.indexOf("\"", p2);
p4 = s1.indexOf("\"", p3+1);
String theURL = tag.substring(p3+1, p4);
URL thePictureURL;
try {
if (theURL.indexOf(":") == -1) {
// it's not an absolute URL
thePictureURL = new URL(u, theURL);
} // end if
else {
thePictureURL = new URL(theURL);
}
Toolkit t = Toolkit.getDefaultToolkit();
thePicture = t.getImage(thePictureURL);
thePicture.getHeight(this);
int last = tag.indexOf(">");
newTag = tag.substring(0,last);
if (!hasWidthTag) {
while (thePicture.getWidth(this) == -1) {
try {
Thread.currentThread().sleep(100);
}
catch (InterruptedException e) {
}
}
newTag = newTag + " width=" + thePicture.getWidth(this);
}
if (!hasHeightTag) {
while (thePicture.getHeight(this) == -1) {
try {
Thread.currentThread().sleep(100);
}
catch (InterruptedException e) {
}
}
newTag = newTag + " height=" + thePicture.getHeight(this);
}
newTag = newTag + ">";
}
catch (MalformedURLException e) {
newTag = tag;
}
return newTag;
}
|
|
