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package threaddemo.data;
import java.beans.PropertyChangeListener;
import java.beans.VetoableChangeListener;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
import org.openide.cookies.CloseCookie;
import org.openide.cookies.EditorCookie;
import org.openide.cookies.OpenCookie;
import org.openide.cookies.PrintCookie;
import org.openide.cookies.SaveCookie;
import org.openide.text.CloneableEditorSupport;
import org.openide.util.Task;
import org.openide.util.TaskListener;
import org.openide.windows.CloneableOpenSupport;
import threaddemo.model.Phadhail;
/**
* An editor for phadhails.
* @author Jesse Glick
*/
final class PhadhailEditorSupport extends CloneableEditorSupport implements OpenCookie, CloseCookie, EditorCookie.Observable, PrintCookie {
private final Phadhail ph;
private SaveCookie modified = null;
public PhadhailEditorSupport(Phadhail ph) {
this(ph, new PhadhailEnv(ph));
}
private PhadhailEditorSupport(Phadhail ph, PhadhailEnv env) {
super(env);
if (ph.hasChildren()) throw new IllegalArgumentException();
this.ph = ph;
env.associate(this);
}
protected String messageName() {
// XXX should listen for PhadhailNameEvent too
String n = ph.getName();
if (modified != null) {
n += " *";
}
return n;
}
protected String messageOpened() {
return "Opened " + ph.getPath() + ".";
}
protected String messageOpening() {
return "Opening " + ph.getPath() + "...";
}
protected String messageSave() {
return "Saved " + ph.getPath() + ".";
}
protected String messageToolTip() {
return ph.getPath();
}
/**
* Same as default behavior in CES except solves a deadlock.
* The problem arises e.g. when first calling openDocument while
* holding a write lock: the prepareDocument task is posted to RP,
* where it starts to run but then Env.inputStream blocks getting
* a read lock.
*/
public Task prepareDocument() {
// XXX hack no longer works after patch to CES; pD() not called from oD() + gD()
((PhadhailEnv)env).preloadInputStream();
Task t = super.prepareDocument();
t.addTaskListener(new TaskListener() {
public void taskFinished(Task t) {
((PhadhailEnv)env).forgetPreloadedInputStream();
}
});
return t;
}
private static final class PhadhailEnv implements CloneableEditorSupport.Env {
private final Phadhail ph;
private PhadhailEditorSupport supp;
private final long createTime;
private byte[] preloadedContents = null;
public PhadhailEnv(Phadhail ph) {
this.ph = ph;
createTime = System.currentTimeMillis();
}
void associate(PhadhailEditorSupport supp) {
this.supp = supp;
}
public CloneableOpenSupport findCloneableOpenSupport() {
return supp;
}
public String getMimeType() {
return "text/plain";
}
public Date getTime() {
return new Date(createTime);
}
public void preloadInputStream() {
if (preloadedContents == null) {
try {
InputStream is = ph.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream(is.available());
byte[] buf = new byte[4096];
int read;
while ((read = is.read(buf)) != -1) {
baos.write(buf, 0, read);
}
preloadedContents = baos.toByteArray();
} catch (IOException e) {
// ignore, will show up later
e.printStackTrace();
}
}
}
public void forgetPreloadedInputStream() {
preloadedContents = null;
}
public InputStream inputStream() throws IOException {
if (preloadedContents != null) {
return new ByteArrayInputStream(preloadedContents);
} else {
return ph.getInputStream();
}
}
public OutputStream outputStream() throws IOException {
return ph.getOutputStream();
}
public boolean isModified() {
return supp.modified != null;
}
public boolean isValid() {
// XXX a better model for Phadhail would have an isValid method
// and deleting it would set it to false...
return true;
}
public void addPropertyChangeListener(PropertyChangeListener l) {
}
public void addVetoableChangeListener(VetoableChangeListener l) {
}
public void removePropertyChangeListener(PropertyChangeListener l) {
}
public void removeVetoableChangeListener(VetoableChangeListener l) {
}
public void markModified() throws IOException {
// For some mysterious reason this can be called repeatedly?
//assert supp.modified == null;
if (supp.modified == null) {
supp.modified = new Save();
PhadhailLookups.modified(ph, supp.modified);
}
}
private final class Save implements SaveCookie {
public void save() throws IOException {
supp.saveDocument();
}
public String toString() {
return "Save[" + ph + "]";
}
}
public void unmarkModified() {
if (supp.modified != null) {
PhadhailLookups.saved(ph, supp.modified);
supp.modified = null;
}
}
}
}
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