/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
package org.epic.perleditor.templates.textmanipulation;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
//import net.sourceforge.phpdt.internal.corext.util.IOCloser;
import org.epic.perleditor.templates.util.IOCloser;
//import net.sourceforge.phpdt.internal.ui.PHPStatusConstants;
import org.epic.perleditor.templates.ui.EPICStatusConstants;
//import net.sourceforge.phpeclipse.PHPeclipsePlugin;
import org.epic.perleditor.PerlEditorPlugin;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.jface.util.Assert;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.texteditor.IDocumentProvider;
/* package */ class TextBufferFactory {
private IDocumentProvider fDocumentProvider;
private Map fFileValueMap;
private Map fBufferValueMap;
private static class Value {
TextBuffer buffer;
FileEditorInput input;
IDocument document;
IAnnotationModel annotationModel;
int references;
public Value(TextBuffer b, FileEditorInput i, IDocument d, IAnnotationModel m) {
buffer= b;
input= i;
document= d;
annotationModel= m;
}
}
public TextBufferFactory() {
// XXX http://dev.eclipse.org/bugs/show_bug.cgi?id=5170
// Need way to map a file to a document without knowing any kind of document provider.
this(PerlEditorPlugin.getDefault().getDocumentProvider());
}
public TextBufferFactory(IDocumentProvider provider) {
fDocumentProvider= provider;
Assert.isNotNull(fDocumentProvider);
fFileValueMap= new HashMap(5);
fBufferValueMap= new HashMap(5);
}
public TextBuffer acquire(IFile file) throws CoreException {
FileEditorInput input= new FileEditorInput(file);
Value value= (Value)fFileValueMap.get(input);
if (value != null) {
value.references++;
return value.buffer;
}
fDocumentProvider.connect(input);
IDocument document= fDocumentProvider.getDocument(input);
IAnnotationModel annotationModel= fDocumentProvider.getAnnotationModel(input);
annotationModel.connect(document);
value= new Value(new TextBuffer(document), input, document, annotationModel);
fFileValueMap.put(input, value);
fBufferValueMap.put(value.buffer, value);
value.references++;
return value.buffer;
}
public void release(TextBuffer buffer) {
final Value value= (Value)fBufferValueMap.get(buffer);
if (value == null)
return;
value.references--;
if (value.references == 0) {
buffer.release();
value.annotationModel.disconnect(value.document);
fDocumentProvider.disconnect(value.input);
fFileValueMap.remove(value.input);
fBufferValueMap.remove(buffer);
}
}
public void commitChanges(TextBuffer buffer, boolean force, IProgressMonitor pm) throws CoreException {
final Value value= (Value)fBufferValueMap.get(buffer);
if (value == null)
return;
boolean save= force || fDocumentProvider.mustSaveDocument(value.input);
if (save) {
IWorkspaceRunnable action= new IWorkspaceRunnable() {
public void run(IProgressMonitor pm) throws CoreException {
fDocumentProvider.aboutToChange(value.input);
fDocumentProvider.saveDocument(pm, value.input, value.document, true);
}
};
try {
ResourcesPlugin.getWorkspace().run(action, pm);
} finally {
fDocumentProvider.changed(value.input);
}
}
}
public TextBuffer create(IFile file) throws CoreException {
FileEditorInput input= new FileEditorInput(file);
IDocument document= fDocumentProvider.getDocument(input);
if (document != null) {
return new TextBuffer(new Document(document.get()));
} else {
return createFromFile(file);
}
}
private TextBuffer createFromFile(IFile file) throws CoreException {
IDocument document;
// Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=19319
InputStream stream= file.getContents();
InputStreamReader in= null;
try {
document= new Document();
in= new InputStreamReader(new BufferedInputStream(stream), ResourcesPlugin.getEncoding());
StringBuffer buffer= new StringBuffer();
char[] readBuffer= new char[2048];
int n= in.read(readBuffer);
while (n > 0) {
buffer.append(readBuffer, 0, n);
n= in.read(readBuffer);
}
document.set(buffer.toString());
return new TextBuffer(document);
} catch (IOException x) {
IStatus s= new Status(IStatus.ERROR, PerlEditorPlugin.getPluginId(), EPICStatusConstants.INTERNAL_ERROR, x.getMessage(), x);
throw new CoreException(s);
} finally {
IOCloser.perform(in, stream);
}
}
public TextBuffer create(String content) {
return new TextBuffer(new Document(content));
}
public void save(TextBuffer buffer, IProgressMonitor pm) throws CoreException {
Value value= (Value)fBufferValueMap.get(buffer);
if (value == null)
throwNotManaged();
fDocumentProvider.saveDocument(pm, value.input, value.document, true);
}
public void aboutToChange(TextBuffer buffer) throws CoreException {
Value value= (Value)fBufferValueMap.get(buffer);
if (value == null)
throwNotManaged();
fDocumentProvider.aboutToChange(value.input);
}
public void changed(TextBuffer buffer) throws CoreException {
Value value= (Value)fBufferValueMap.get(buffer);
if (value == null)
throwNotManaged();
fDocumentProvider.changed(value.input);
}
private void throwNotManaged() throws CoreException {
IStatus s= new Status(IStatus.ERROR, PerlEditorPlugin.getPluginId(),
EPICStatusConstants.INTERNAL_ERROR, TextManipulationMessages.getString("TextBufferFactory.bufferNotManaged"), null); //$NON-NLS-1$
throw new CoreException(s);
}
}