/*******************************************************************************
* Copyright (c) 2008, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.sse.ui.internal.provisional.style;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.BadPositionCategoryException;
import org.eclipse.jface.text.DefaultPositionUpdater;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.DocumentPartitioningChangedEvent;
import org.eclipse.jface.text.DocumentRewriteSessionEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentExtension3;
import org.eclipse.jface.text.IDocumentExtension4;
import org.eclipse.jface.text.IDocumentListener;
import org.eclipse.jface.text.IDocumentPartitioningListener;
import org.eclipse.jface.text.IDocumentPartitioningListenerExtension;
import org.eclipse.jface.text.IDocumentPartitioningListenerExtension2;
import org.eclipse.jface.text.IDocumentRewriteSessionListener;
import org.eclipse.jface.text.IPositionUpdater;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextInputListener;
import org.eclipse.jface.text.ITextListener;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.ITextViewerExtension5;
import org.eclipse.jface.text.ITypedRegion;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.TextEvent;
import org.eclipse.jface.text.TextPresentation;
import org.eclipse.jface.text.TextUtilities;
import org.eclipse.jface.text.TypedPosition;
import org.eclipse.jface.text.presentation.IPresentationDamager;
import org.eclipse.jface.text.presentation.IPresentationReconciler;
import org.eclipse.jface.text.presentation.IPresentationReconcilerExtension;
import org.eclipse.jface.text.presentation.IPresentationRepairer;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.wst.sse.core.internal.provisional.events.IStructuredDocumentListener;
import org.eclipse.wst.sse.core.internal.provisional.events.NewDocumentEvent;
import org.eclipse.wst.sse.core.internal.provisional.events.NoChangeEvent;
import org.eclipse.wst.sse.core.internal.provisional.events.RegionChangedEvent;
import org.eclipse.wst.sse.core.internal.provisional.events.RegionsReplacedEvent;
import org.eclipse.wst.sse.core.internal.provisional.events.StructuredDocumentRegionsReplacedEvent;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegionList;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionList;
public class StructuredPresentationReconciler implements IPresentationReconciler, IPresentationReconcilerExtension {
/** Prefix of the name of the position category for tracking damage regions. */
final static String TRACKED_PARTITION= "__reconciler_tracked_partition"; //$NON-NLS-1$
private final static boolean _trace = Boolean.valueOf(Platform.getDebugOption("org.eclipse.wst.sse.ui/structuredPresentationReconciler")).booleanValue(); //$NON-NLS-1$
private final static boolean _traceTime = Boolean.valueOf(Platform.getDebugOption("org.eclipse.wst.sse.ui/structuredPresentationReconciler/time")).booleanValue(); //$NON-NLS-1$
private static final String TRACE_PREFIX = "StructuredPresentationReconciler: ";
private long time0;
private long time1;
/**
* Internal listener class.
*/
class InternalListener implements
ITextInputListener, IDocumentListener, ITextListener, IStructuredDocumentListener,
IDocumentPartitioningListener, IDocumentPartitioningListenerExtension, IDocumentPartitioningListenerExtension2, IDocumentRewriteSessionListener {
/** Set to <code>true</code> if between a document about to be changed and a changed event. */
private boolean fDocumentChanging= false;
/** Flag for the document being in a rewrite session */
private boolean fInRewriteSession = false;
/** Flag for some kind of changes being applied during a document rewrite session */
private boolean fHasIncomingChanges = false;
/**
* The cached redraw state of the text viewer.
* @since 3.0
*/
private boolean fCachedRedrawState= true;
public void newModel(NewDocumentEvent structuredDocumentEvent) {
if(fInRewriteSession) {
fHasIncomingChanges = true;
return;
}
if (_trace) {
time1 = System.currentTimeMillis();
}
int length = structuredDocumentEvent.getLength();
recordDamage(new Region(0, length), structuredDocumentEvent.getDocument());
if (_trace) {
System.out.println("\n" + TRACE_PREFIX + "calculated damage for NewDocumentEvent: (length=" + length + ")"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
if (_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "calculated damage for NewDocumentEvent in " + (System.currentTimeMillis()-time1) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
}
public void noChange(NoChangeEvent structuredDocumentEvent) {
if(fInRewriteSession) {
fHasIncomingChanges = true;
return;
}
if (_trace) {
time1 = System.currentTimeMillis();
}
if (structuredDocumentEvent.reason == NoChangeEvent.NO_CONTENT_CHANGE ) {
IRegion damage = new Region(structuredDocumentEvent.fOffset, structuredDocumentEvent.fLength);
recordDamage(damage, structuredDocumentEvent.fDocument);
}
if (_trace && _traceTime) {
System.out.println("\n" + TRACE_PREFIX + "calculated damage for NoChangeEvent in " + (System.currentTimeMillis()-time1) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
}
public void nodesReplaced(StructuredDocumentRegionsReplacedEvent structuredDocumentEvent) {
if(fInRewriteSession) {
fHasIncomingChanges = true;
return;
}
if (_trace) {
time1 = System.currentTimeMillis();
}
IRegion damage;
IStructuredDocumentRegionList newDocumentRegions = structuredDocumentEvent.getNewStructuredDocumentRegions();
if (newDocumentRegions.getLength() > 0) {
int startOffset = newDocumentRegions.item(0).getStartOffset();
int length = newDocumentRegions.item(newDocumentRegions.getLength() - 1).getEndOffset() - startOffset;
damage = new Region(startOffset, length);
}
else {
damage = new Region(structuredDocumentEvent.fOffset, structuredDocumentEvent.getLength());
}
recordDamage(damage, structuredDocumentEvent.fDocument);
if (_trace) {
System.out.println("\n" + TRACE_PREFIX + "calculated damage for StructuredDocumentRegionsReplacedEvent: [" + damage.getOffset() + ":" + damage.getLength() + "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$//$NON-NLS-4$
System.out.flush();
}
if (_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "calculated damage for StructuredDocumentRegionsReplacedEvent in " + (System.currentTimeMillis()-time1) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
}
public void regionChanged(RegionChangedEvent structuredDocumentEvent) {
if(fInRewriteSession) {
fHasIncomingChanges = true;
return;
}
if (_trace) {
time1 = System.currentTimeMillis();
}
IStructuredDocumentRegion documentRegion = structuredDocumentEvent.getStructuredDocumentRegion();
ITextRegion changedRegion = structuredDocumentEvent.getRegion();
int startOffset = documentRegion.getStartOffset(changedRegion);
int length = changedRegion.getLength();
IRegion damage = new Region(startOffset, length);
recordDamage(damage, structuredDocumentEvent.fDocument);
if (_trace) {
System.out.println("\n" + TRACE_PREFIX + "calculated damage for RegionChangedEvent: [" + damage.getOffset() + ":" + damage.getLength() + "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$//$NON-NLS-4$
System.out.flush();
}
if (_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "calculated damage for RegionChangedEvent in " + (System.currentTimeMillis()-time1) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
}
public void regionsReplaced(RegionsReplacedEvent structuredDocumentEvent) {
if(fInRewriteSession) {
fHasIncomingChanges = true;
return;
}
if (_trace) {
time1 = System.currentTimeMillis();
}
IRegion damage;
IStructuredDocumentRegion documentRegion = structuredDocumentEvent.getStructuredDocumentRegion();
ITextRegionList newRegions = structuredDocumentEvent.getNewRegions();
if (newRegions.size() > 0) {
ITextRegion firstChangedRegion = newRegions.get(0);
ITextRegion lastChangedRegion = newRegions.get(newRegions.size() - 1);
int startOffset = documentRegion.getStartOffset(firstChangedRegion);
int length = documentRegion.getEndOffset(lastChangedRegion) - startOffset;
damage = new Region(startOffset, length);
}
else {
damage = new Region(documentRegion.getStartOffset(), documentRegion.getLength());
}
recordDamage(damage, structuredDocumentEvent.fDocument);
if (_trace) {
System.out.println("\n" + TRACE_PREFIX + "calculated damage for RegionsReplacedEvent: [" + damage.getOffset() + ":" + damage.getLength() + "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$//$NON-NLS-4$
System.out.flush();
}
if (_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "calculated damage for RegionsReplacedEvent in " + (System.currentTimeMillis()-time1) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
}
/*
* @see ITextInputListener#inputDocumentAboutToBeChanged(IDocument, IDocument)
*/
public void inputDocumentAboutToBeChanged(IDocument oldDocument, IDocument newDocument) {
if (oldDocument != null) {
try {
fViewer.removeTextListener(this);
oldDocument.removeDocumentListener(this);
oldDocument.removeDocumentPartitioningListener(this);
if (oldDocument instanceof IStructuredDocument) {
((IStructuredDocument) oldDocument).removeDocumentChangedListener(this);
}
oldDocument.removePositionUpdater(fPositionUpdater);
oldDocument.removePositionCategory(fPositionCategory);
} catch (BadPositionCategoryException x) {
// should not happened for former input documents;
}
}
}
/*
* @see ITextInputListener#inputDocumenChanged(IDocument, IDocument)
*/
public void inputDocumentChanged(IDocument oldDocument, IDocument newDocument) {
if (_trace || _traceTime) {
time1 = System.currentTimeMillis();
}
fDocumentChanging= false;
fCachedRedrawState= true;
if (newDocument != null) {
newDocument.addPositionCategory(fPositionCategory);
newDocument.addPositionUpdater(fPositionUpdater);
if (newDocument instanceof IStructuredDocument) {
newDocument.addDocumentPartitioningListener(this);
newDocument.addDocumentListener(this);
((IStructuredDocument)newDocument).addDocumentChangedListener(this);
}
fViewer.addTextListener(this);
if (newDocument instanceof IStructuredDocument) {
setDocumentToDamagers(newDocument);
setDocumentToRepairers(newDocument);
processDamage(new Region(0, newDocument.getLength()), newDocument);
}
}
if (_trace) {
System.out.println(TRACE_PREFIX + "processed damage for inputDocumentChanged in " + (System.currentTimeMillis() - time1) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/*
* @see IDocumentPartitioningListener#documentPartitioningChanged(IDocument)
*/
public void documentPartitioningChanged(IDocument document) {
if (_traceTime) {
time0 = System.currentTimeMillis();
}
if (!fDocumentChanging && fCachedRedrawState)
processDamage(new Region(0, document.getLength()), document);
else
fDocumentPartitioningChanged= true;
if (_trace) {
System.out.println(TRACE_PREFIX + "processed damage for documentPartitioningChanged [full document]"); //$NON-NLS-1$
}
if (_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "processed damage for documentPartitioningChanged in " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/*
* @see IDocumentPartitioningListenerExtension#documentPartitioningChanged(IDocument, IRegion)
* @since 2.0
*/
public void documentPartitioningChanged(IDocument document, IRegion changedRegion) {
if (_traceTime) {
time0 = System.currentTimeMillis();
}
if (!fDocumentChanging && fCachedRedrawState) {
processDamage(new Region(changedRegion.getOffset(), changedRegion.getLength()), document);
} else {
fDocumentPartitioningChanged= true;
fChangedDocumentPartitions= changedRegion;
}
if (_trace) {
System.out.println(TRACE_PREFIX + "processed damage for documentPartitioningChanged [" + changedRegion.getOffset() + ":" + changedRegion.getLength() + "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
if (_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "processed damage for documentPartitioningChanged in " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/*
* @see org.eclipse.jface.text.IDocumentPartitioningListenerExtension2#documentPartitioningChanged(org.eclipse.jface.text.DocumentPartitioningChangedEvent)
* @since 3.0
*/
public void documentPartitioningChanged(DocumentPartitioningChangedEvent event) {
IRegion changedRegion= event.getChangedRegion(getDocumentPartitioning());
if (changedRegion != null)
documentPartitioningChanged(event.getDocument(), changedRegion);
}
/*
* @see IDocumentListener#documentAboutToBeChanged(DocumentEvent)
*/
public void documentAboutToBeChanged(DocumentEvent e) {
fDocumentChanging= true;
if (fCachedRedrawState) {
try {
int offset= e.getOffset() + e.getLength();
ITypedRegion region= getPartition(e.getDocument(), offset);
fRememberedPosition= new TypedPosition(region);
e.getDocument().addPosition(fPositionCategory, fRememberedPosition);
} catch (BadLocationException x) {
// can not happen
} catch (BadPositionCategoryException x) {
// should not happen on input elements
}
}
}
/*
* @see IDocumentListener#documentChanged(DocumentEvent)
*/
public void documentChanged(DocumentEvent e) {
if (fCachedRedrawState) {
try {
e.getDocument().removePosition(fPositionCategory, fRememberedPosition);
} catch (BadPositionCategoryException x) {
// can not happen on input documents
}
}
fDocumentChanging= false;
}
/*
* @see ITextListener#textChanged(TextEvent)
*/
public void textChanged(TextEvent e) {
if(fInRewriteSession) {
fHasIncomingChanges = true;
return;
}
fCachedRedrawState= e.getViewerRedrawState();
if (!fCachedRedrawState) {
if (_trace) {
System.out.println("\n" + TRACE_PREFIX + "returned early from textChanged(TextEvent)"); //$NON-NLS-1$ //$NON-NLS-2$
}
return;
}
if (_trace) {
System.out.println("\n" + TRACE_PREFIX + "entering textChanged(TextEvent)"); //$NON-NLS-1$ //$NON-NLS-2$
time0 = System.currentTimeMillis();
}
IRegion damage= null;
IDocument document= null;
if (e.getDocumentEvent() == null) {
document= fViewer.getDocument();
if (document != null) {
if (e.getOffset() == 0 && e.getLength() == 0 && e.getText() == null) {
// redraw state change, damage the whole document
damage= new Region(0, document.getLength());
} else {
IRegion region= widgetRegion2ModelRegion(e);
try {
String text= document.get(region.getOffset(), region.getLength());
DocumentEvent de= new DocumentEvent(document, region.getOffset(), region.getLength(), text);
damage= getDamage(de, false);
} catch (BadLocationException x) {
/* ignored in platform PresentationReconciler, too */
}
}
}
} else {
DocumentEvent de= e.getDocumentEvent();
document= de.getDocument();
damage= getDamage(de, true);
}
if(_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "calculated simple text damage at " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
boolean damageOverlaps = processRecordedDamages(damage, document);
if(_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "processed recorded structured text damage at " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
if (damage != null && document != null && !damageOverlaps) {
processDamage(damage, document);
if(_trace && _traceTime) {
System.out.println(TRACE_PREFIX + "processed simple text damage at " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
System.out.flush();
}
}
fDocumentPartitioningChanged= false;
fChangedDocumentPartitions= null;
if(_trace) {
System.out.println(TRACE_PREFIX + "finished textChanged(TextEvent) in " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/**
* Translates the given text event into the corresponding range of the viewer's document.
*
* @param e the text event
* @return the widget region corresponding the region of the given event
* @since 2.1
*/
protected IRegion widgetRegion2ModelRegion(TextEvent e) {
String text= e.getText();
int length= text == null ? 0 : text.length();
if (fViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension= (ITextViewerExtension5) fViewer;
return extension.widgetRange2ModelRange(new Region(e.getOffset(), length));
}
IRegion visible= fViewer.getVisibleRegion();
IRegion region= new Region(e.getOffset() + visible.getOffset(), length);
return region;
}
public void documentRewriteSessionChanged(DocumentRewriteSessionEvent event) {
fInRewriteSession = (event != null && event.fChangeType == DocumentRewriteSessionEvent.SESSION_START);
if(!fInRewriteSession && fHasIncomingChanges && event != null) {
if (_trace)
time0 = System.currentTimeMillis();
processDamage(new Region(0, event.fDocument.getLength()), event.fDocument);
if(_trace && _traceTime)
System.out.println(TRACE_PREFIX + " processed damaged after ending document rewrite session at " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
fHasIncomingChanges = false;
}
}
}
private static class RecordedDamage {
IRegion damage;
IDocument document;
RecordedDamage(IRegion damage, IDocument document) {
this.damage = damage;
this.document = document;
}
}
/** The map of presentation damagers. */
private Map fDamagers;
/** The map of presentation repairers. */
private Map fRepairers;
/** The target viewer. */
private ITextViewer fViewer;
/** The internal listener. */
private InternalListener fInternalListener= new InternalListener();
/** The name of the position category to track damage regions. */
private String fPositionCategory;
/** The position updated for the damage regions' position category. */
private IPositionUpdater fPositionUpdater;
/** The positions representing the damage regions. */
private TypedPosition fRememberedPosition;
/** Flag indicating the receipt of a partitioning changed notification. */
private boolean fDocumentPartitioningChanged= false;
/** The range covering the changed partitioning. */
private IRegion fChangedDocumentPartitions= null;
/**
* Because structured document events fire before textChanged(), it's
* possible the widget isn't fully aware of the changes to its contents.
* "Record" the damage to process after textChanged() has been fired.
*/
private List fRecordedDamages = new ArrayList(2);
/**
* The partitioning used by this presentation reconciler.
* @since 3.0
*/
private String fPartitioning;
private IDocument fLastDocument;
/**
* Creates a new presentation reconciler. There are no damagers or repairers
* registered with this reconciler by default. The default partitioning
* <code>IDocumentExtension3.DEFAULT_PARTITIONING</code> is used.
*/
public StructuredPresentationReconciler() {
super();
fPartitioning= IDocumentExtension3.DEFAULT_PARTITIONING;
fPositionCategory= TRACKED_PARTITION + hashCode();
fPositionUpdater= new DefaultPositionUpdater(fPositionCategory);
}
/**
* Sets the document partitioning for this presentation reconciler.
*
* @param partitioning the document partitioning for this presentation reconciler.
* @since 3.0
*/
public void setDocumentPartitioning(String partitioning) {
Assert.isNotNull(partitioning);
fPartitioning= partitioning;
}
/*
* @see org.eclipse.jface.text.presentation.IPresentationReconcilerExtension#geDocumenttPartitioning()
* @since 3.0
*/
public String getDocumentPartitioning() {
return fPartitioning;
}
/**
* Registers the given presentation damager for a particular content type.
* If there is already a damager registered for this type, the old damager
* is removed first.
*
* @param damager the presentation damager to register, or <code>null</code> to remove an existing one
* @param contentType the content type under which to register
*/
public void setDamager(IPresentationDamager damager, String contentType) {
Assert.isNotNull(contentType);
if (fDamagers == null)
fDamagers= new HashMap();
if (damager == null)
fDamagers.remove(contentType);
else
fDamagers.put(contentType, damager);
}
/**
* Registers the given presentation repairer for a particular content type.
* If there is already a repairer registered for this type, the old repairer
* is removed first.
*
* @param repairer the presentation repairer to register, or <code>null</code> to remove an existing one
* @param contentType the content type under which to register
*/
public void setRepairer(IPresentationRepairer repairer, String contentType) {
Assert.isNotNull(contentType);
if (fRepairers == null)
fRepairers= new HashMap();
if (repairer == null)
fRepairers.remove(contentType);
else
fRepairers.put(contentType, repairer);
}
/*
* @see IPresentationReconciler#install(ITextViewer)
*/
public void install(ITextViewer viewer) {
if(_trace) {
time0 = System.currentTimeMillis();
}
Assert.isNotNull(viewer);
fViewer= viewer;
fViewer.addTextInputListener(fInternalListener);
IDocument document= viewer.getDocument();
if (document != null) {
fInternalListener.inputDocumentChanged(null, document);
if(document instanceof IStructuredDocument) {
((IStructuredDocument) document).addDocumentChangedListener(fInternalListener);
}
if(document instanceof IDocumentExtension4) {
((IDocumentExtension4) document).addDocumentRewriteSessionListener(fInternalListener);
}
}
if(_trace) {
System.out.println(TRACE_PREFIX + "installed to text viewer in " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/*
* @see IPresentationReconciler#uninstall()
*/
public void uninstall() {
if(_trace) {
time0 = System.currentTimeMillis();
}
fViewer.removeTextInputListener(fInternalListener);
IDocument document = null;
if(( document = fViewer.getDocument()) instanceof IStructuredDocument) {
((IStructuredDocument) document).removeDocumentChangedListener(fInternalListener);
}
if(document instanceof IDocumentExtension4) {
((IDocumentExtension4) document).removeDocumentRewriteSessionListener(fInternalListener);
}
// Ensure we uninstall all listeners
fInternalListener.inputDocumentAboutToBeChanged(fViewer.getDocument(), null);
if(_trace) {
System.out.println(TRACE_PREFIX + "uninstalled from text viewer in " + (System.currentTimeMillis() - time0) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/*
* @see IPresentationReconciler#getDamager(String)
*/
public IPresentationDamager getDamager(String contentType) {
if (fDamagers == null)
return null;
final int idx = contentType.indexOf(':');
if(idx > 0) {
contentType = contentType.substring(0, idx + 1);
}
return (IPresentationDamager) fDamagers.get(contentType);
}
/*
* @see IPresentationReconciler#getRepairer(String)
*/
public IPresentationRepairer getRepairer(String contentType) {
if (fRepairers == null)
return null;
final int idx = contentType.indexOf(':');
if(idx > 0) {
contentType = contentType.substring(0, idx + 1);
}
return (IPresentationRepairer) fRepairers.get(contentType);
}
/**
* Informs all registered damagers about the document on which they will work.
*
* @param document the document on which to work
*/
protected void setDocumentToDamagers(IDocument document) {
if (fDamagers != null) {
Iterator e= fDamagers.values().iterator();
while (e.hasNext()) {
IPresentationDamager damager= (IPresentationDamager) e.next();
damager.setDocument(document);
}
}
}
/**
* Informs all registered repairers about the document on which they will work.
*
* @param document the document on which to work
*/
protected void setDocumentToRepairers(IDocument document) {
if (fRepairers != null) {
Iterator e= fRepairers.values().iterator();
while (e.hasNext()) {
IPresentationRepairer repairer= (IPresentationRepairer) e.next();
repairer.setDocument(document);
}
}
}
/**
* Constructs a "repair description" for the given damage and returns this
* description as a text presentation. For this, it queries the partitioning
* of the damage region and asks the appropriate presentation repairer for
* each partition to construct the "repair description" for this partition.
*
* @param damage the damage to be repaired
* @param document the document whose presentation must be repaired
* @return the presentation repair description as text presentation or
* <code>null</code> if the partitioning could not be computed
*/
protected TextPresentation createPresentation(IRegion damage, IDocument document) {
try {
int validLength = Math.min(damage.getLength(), document.getLength() - damage.getOffset());
if (fRepairers == null || fRepairers.isEmpty()) {
TextPresentation presentation= new TextPresentation(damage, 1);
presentation.setDefaultStyleRange(new StyleRange(damage.getOffset(), validLength, null, null));
return presentation;
}
TextPresentation presentation= new TextPresentation(damage, 1000);
ITypedRegion[] partitions= TextUtilities.computePartitioning(document, getDocumentPartitioning(), damage.getOffset(), validLength, false);
for (int i= 0; i < partitions.length; i++) {
ITypedRegion r= partitions[i];
IPresentationRepairer repairer= getRepairer(r.getType());
if (repairer != null)
repairer.createPresentation(presentation, r);
}
return presentation;
} catch (BadLocationException x) {
/* ignored in platform PresentationReconciler, too */
}
return null;
}
/**
* Checks for the first and the last affected partition affected by a
* document event and calls their damagers. Invalidates everything from the
* start of the damage for the first partition until the end of the damage
* for the last partition.
*
* @param e the event describing the document change
* @param optimize <code>true</code> if partition changes should be
* considered for optimization
* @return the damaged caused by the change or <code>null</code> if
* computing the partitioning failed
* @since 3.0
*/
IRegion getDamage(DocumentEvent e, boolean optimize) {
int length= e.getText() == null ? 0 : e.getText().length();
if (fDamagers == null || fDamagers.isEmpty()) {
length= Math.max(e.getLength(), length);
length= Math.min(e.getDocument().getLength() - e.getOffset(), length);
return new Region(e.getOffset(), length);
}
boolean isDeletion= length == 0;
IRegion damage= null;
try {
int offset= e.getOffset();
if (isDeletion)
offset= Math.max(0, offset - 1);
ITypedRegion partition= getPartition(e.getDocument(), offset);
IPresentationDamager damager= getDamager(partition.getType());
if (damager == null)
return null;
IRegion r= damager.getDamageRegion(partition, e, fDocumentPartitioningChanged);
if (!fDocumentPartitioningChanged && optimize && !isDeletion) {
damage= r;
} else {
int damageEnd= getDamageEndOffset(e);
int parititionDamageEnd= -1;
if (fChangedDocumentPartitions != null)
parititionDamageEnd= fChangedDocumentPartitions.getOffset() + fChangedDocumentPartitions.getLength();
int end= Math.max(damageEnd, parititionDamageEnd);
damage= end == -1 ? r : new Region(r.getOffset(), end - r.getOffset());
}
} catch (BadLocationException x) {
/* ignored in platform PresentationReconciler, too */
}
return damage;
}
/**
* Returns the end offset of the damage. If a partition has been split by
* the given document event also the second half of the original
* partition must be considered. This is achieved by using the remembered
* partition range.
*
* @param e the event describing the change
* @return the damage end offset (excluding)
* @exception BadLocationException if method accesses invalid offset
*/
int getDamageEndOffset(DocumentEvent e) throws BadLocationException {
IDocument d= e.getDocument();
int length= 0;
if (e.getText() != null) {
length= e.getText().length();
if (length > 0)
-- length;
}
ITypedRegion partition= getPartition(d, e.getOffset() + length);
int endOffset= partition.getOffset() + partition.getLength();
if (endOffset == e.getOffset())
return -1;
int end= fRememberedPosition == null ? -1 : fRememberedPosition.getOffset() + fRememberedPosition.getLength();
if (endOffset < end && end < d.getLength())
partition= getPartition(d, end);
//if there is not damager for the partition then use the endOffset of the partition
IPresentationDamager damager= getDamager(partition.getType());
if (damager != null) {
IRegion r= damager.getDamageRegion(partition, e, fDocumentPartitioningChanged);
endOffset = r.getOffset() + r.getLength();
}
return endOffset;
}
void processRecordedDamages() {
processRecordedDamages(null, null);
}
boolean processRecordedDamages(IRegion damage, IDocument document) {
RecordedDamage[] recordings = null;
boolean recordingOverlaps = false;
synchronized (fRecordedDamages) {
recordings = (RecordedDamage[]) fRecordedDamages.toArray(new RecordedDamage[fRecordedDamages.size()]);
fRecordedDamages.clear();
}
for (int i = 0; i < recordings.length; i++) {
if (isOverlappingRegion(damage, recordings[i].damage) && document == recordings[i].document)
recordingOverlaps = true;
processDamage(recordings[i].damage, recordings[i].document);
}
return recordingOverlaps;
}
private boolean isOverlappingRegion(IRegion base, IRegion damage) {
if(base == null || damage == null)
return false;
int baseEnd = base.getOffset() + base.getLength();
int damageEnd = damage.getOffset() + damage.getLength();
return damage.getOffset() <= base.getOffset() && (damageEnd >= baseEnd);
}
/**
* Processes the given damage.
* @param damage the damage to be repaired
* @param document the document whose presentation must be repaired
*/
void processDamage(IRegion damage, IDocument document) {
if (damage != null && damage.getLength() > 0) {
TextPresentation p = createPresentation(damage, document);
if (p != null) {
/**
* 229749 - Read-Only highlighting support missing
* 272981 - Read-only highlighting moved to semantic highlighting
*/
applyTextRegionCollection(p);
}
}
}
/**
* Processes the given damage.
* @param damage the damage to be repaired
* @param document the document whose presentation must be repaired
*/
void recordDamage(IRegion damage, IDocument document) {
if (damage != null && damage.getLength() > 0) {
synchronized (fRecordedDamages) {
fRecordedDamages.add(new RecordedDamage(damage, document));
}
}
}
/**
* Applies the given text presentation to the text viewer the presentation
* reconciler is installed on.
*
* @param presentation the text presentation to be applied to the text viewer
*/
void applyTextRegionCollection(TextPresentation presentation) {
fViewer.changeTextPresentation(presentation, false);
}
/**
* Returns the partition for the given offset in the given document.
*
* @param document the document
* @param offset the offset
* @return the partition
* @throws BadLocationException if offset is invalid in the given document
* @since 3.0
*/
ITypedRegion getPartition(IDocument document, int offset) throws BadLocationException {
return TextUtilities.getPartition(document, getDocumentPartitioning(), offset, false);
}
/**
* Constructs a "repair description" for the given damage and returns this
* description as a text presentation, essentially making
* {@link #createPresentation(IRegion, IDocument)} publicly callable.
* <p>
* NOTE: Should not be used if this reconciler is installed on a viewer.
* This method is considered EXPERIMENTAL and may not be available in
* subsequent versions.
* </p>
*
* @param damage
* the damage to be repaired
* @param document
* the document whose presentation must be repaired
* @return the presentation repair description as text presentation
*/
public TextPresentation createRepairDescription(IRegion damage, IDocument document) {
if (document != fLastDocument) {
setDocumentToDamagers(document);
setDocumentToRepairers(document);
fLastDocument= document;
}
return createPresentation(damage, document);
}
}