Attachment 107805 Details for Bug 237923 – Patch for DocShare, implementation based on Annotations (3)

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[patch] Patch for DocShare, implementation based on Annotations (3)

docshare3.txt (text/plain), 11.03 KB, created by Stephan Wahlbrink

on 2008-07-18 04:54:17 EDT

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Creator: Stephan Wahlbrink

Created: 2008-07-18 04:54:17 EDT

Size: 11.03 KB

patch

obsolete

>### Eclipse Workspace Patch 1.0
>#P org.eclipse.ecf.internal.provisional.docshare
>Index: src/org/eclipse/ecf/internal/provisional/docshare/DocShare.java
>===================================================================
>RCS file: /cvsroot/technology/org.eclipse.ecf/plugins/org.eclipse.ecf.docshare/src/org/eclipse/ecf/internal/provisional/docshare/DocShare.java,v
>retrieving revision 1.4
>diff -u -r1.4 DocShare.java
>--- src/org/eclipse/ecf/internal/provisional/docshare/DocShare.java	16 Jun 2008 16:33:45 -0000	1.4
>+++ src/org/eclipse/ecf/internal/provisional/docshare/DocShare.java	18 Jul 2008 08:52:03 -0000
>@@ -13,8 +13,7 @@
> package org.eclipse.ecf.internal.provisional.docshare;
> 
> import java.io.*;
>-import java.util.Iterator;
>-import java.util.List;
>+import java.util.*;
> import org.eclipse.core.filesystem.EFS;
> import org.eclipse.core.filesystem.IFileStore;
> import org.eclipse.core.runtime.*;
>@@ -31,6 +30,8 @@
> import org.eclipse.ecf.internal.provisional.docshare.messages.*;
> import org.eclipse.jface.dialogs.MessageDialog;
> import org.eclipse.jface.text.*;
>+import org.eclipse.jface.text.source.*;
>+import org.eclipse.jface.viewers.*;
> import org.eclipse.osgi.util.NLS;
> import org.eclipse.swt.custom.StyledText;
> import org.eclipse.swt.widgets.Control;
>@@ -48,6 +49,97 @@
>  */
> public class DocShare extends AbstractShare {
> 
>+	private static class SelectionReceiver {
>+
>+		private static final String SELECTION_ANNOTATION_ID = "org.eclipse.ecf.docshare.annotations.RemoteSelection"; //$NON-NLS-1$
>+		private static final String CURSOR_ANNOTATION_ID = "org.eclipse.ecf.docshare.annotations.RemoteCursor"; //$NON-NLS-1$
>+
>+		/**
>+		 * Annotation model of current document
>+		 */
>+		private IAnnotationModel annotationModel;
>+
>+		/**
>+		 * Object to use as lock for changing in annotation model,
>+		 * <code>null</code> if no model is provided.
>+		 */
>+		private Object annotationModelLock;
>+
>+		/**
>+		 * Annotation for remote selection in annotationModel
>+		 */
>+		private Annotation currentAnnotation;
>+
>+		public SelectionReceiver(ITextEditor editor) {
>+			if (editor == null) {
>+				return;
>+			}
>+			IDocumentProvider documentProvider = editor.getDocumentProvider();
>+			if (documentProvider != null) {
>+				this.annotationModel = documentProvider.getAnnotationModel(editor.getEditorInput());
>+				if (this.annotationModel != null) {
>+					if (this.annotationModel instanceof ISynchronizable) {
>+						this.annotationModelLock = ((ISynchronizable) this.annotationModel).getLockObject();
>+					}
>+					if (this.annotationModelLock == null) {
>+						this.annotationModelLock = this;
>+					}
>+				}
>+			}
>+		}
>+
>+		void handleMessage(final SelectionMessage remoteMsg) {
>+			if (this.annotationModelLock == null) {
>+				return;
>+			}
>+			final Position newPosition = new Position(remoteMsg.getOffset(), remoteMsg.getLength());
>+			final Annotation newAnnotation = new Annotation(newPosition.getLength() > 0 ? SELECTION_ANNOTATION_ID : CURSOR_ANNOTATION_ID, false, "Remote Selection");
>+			synchronized (this.annotationModelLock) {
>+				if (this.annotationModel != null) {
>+					// initial selection, create new
>+					if (this.currentAnnotation == null) {
>+						this.currentAnnotation = newAnnotation;
>+						this.annotationModel.addAnnotation(newAnnotation, newPosition);
>+						return;
>+					}
>+					// selection not changed, skip
>+					if (this.currentAnnotation.getType() == newAnnotation.getType()) {
>+						Position oldPosition = this.annotationModel.getPosition(this.currentAnnotation);
>+						if (oldPosition == null || newPosition.equals(oldPosition)) {
>+							return;
>+						}
>+					}
>+					// selection changed, replace annotation
>+					if (this.annotationModel instanceof IAnnotationModelExtension) {
>+						Annotation[] oldAnnotations = new Annotation[] {this.currentAnnotation};
>+						this.currentAnnotation = newAnnotation;
>+						Map newAnnotations = Collections.singletonMap(newAnnotation, newPosition);
>+						((IAnnotationModelExtension) this.annotationModel).replaceAnnotations(oldAnnotations, newAnnotations);
>+					} else {
>+						this.annotationModel.removeAnnotation(this.currentAnnotation);
>+						this.annotationModel.addAnnotation(newAnnotation, newPosition);
>+					}
>+				}
>+			}
>+		}
>+
>+		void dispose() {
>+			if (this.annotationModelLock == null) {
>+				return;
>+			}
>+			synchronized (this.annotationModelLock) {
>+				if (this.annotationModel != null) {
>+					if (this.currentAnnotation != null) {
>+						this.annotationModel.removeAnnotation(this.currentAnnotation);
>+						this.currentAnnotation = null;
>+					}
>+					this.annotationModel = null;
>+				}
>+			}
>+		}
>+
>+	}
>+
> 	/**
> 	 * The ID of the initiator
> 	 */
>@@ -83,6 +175,8 @@
> 	// TODO provide for a user-interactive selection mechanism
> 	SynchronizationStrategy sync;
> 
>+	SelectionReceiver selectionReceiver;
>+
> 	/**
> 	 * The document listener is the listener for changes to the *local* copy of
> 	 * the IDocument. This listener is responsible for sending document update
>@@ -131,6 +225,33 @@
> 		}
> 	};
> 
>+	ISelectionChangedListener selectionListener = new ISelectionChangedListener() {
>+
>+		public void selectionChanged(final SelectionChangedEvent event) {
>+			// If the channel is gone, then no reason to handle this.
>+			if (getChannel() == null || !Activator.getDefault().isListenerActive()) {
>+				return;
>+			}
>+			// If the listener is not active, ignore input
>+			if (!Activator.getDefault().isListenerActive()) {
>+				// The local editor is being updated by a remote peer, so we do
>+				// not
>+				// wish to echo this change.
>+				return;
>+			}
>+			Trace.trace(Activator.PLUGIN_ID, NLS.bind("{0}.selectionChanged[{1}]", DocShare.this, event)); //$NON-NLS-1$
>+
>+			if (!(event.getSelection() instanceof ITextSelection)) {
>+				return;
>+			}
>+			final ITextSelection textSelection = (ITextSelection) event.getSelection();
>+			final SelectionMessage msg = new SelectionMessage(textSelection.getOffset(), textSelection.getLength());
>+
>+			sendSelectionMsg(msg);
>+		}
>+
>+	};
>+
> 	/**
> 	 * Create a document sharing session instance.
> 	 * 
>@@ -255,6 +376,11 @@
> 				handleStartMessage((StartMessage) message);
> 			} else if (message instanceof UpdateMessage) {
> 				handleUpdateMessage((UpdateMessage) message);
>+			} else if (message instanceof SelectionMessage) {
>+				SelectionReceiver receiver = selectionReceiver;
>+				if (receiver != null) {
>+					receiver.handleMessage((SelectionMessage) message);
>+				}
> 			} else if (message instanceof StopMessage) {
> 				handleStopMessage((StopMessage) message);
> 			} else {
>@@ -499,6 +625,13 @@
> 			final IDocument doc = getDocumentFromEditor();
> 			if (doc != null)
> 				doc.addDocumentListener(documentListener);
>+			if (this.editor != null) {
>+				ISelectionProvider selectionProvider = this.editor.getSelectionProvider();
>+				if (selectionProvider instanceof IPostSelectionProvider) {
>+					((IPostSelectionProvider) selectionProvider).addPostSelectionChangedListener(selectionListener);
>+				}
>+				selectionReceiver = new SelectionReceiver(this.editor);
>+			}
> 		}
> 		// used to have the ColaSynchronizer.getInstanceFor(...) call here ...
> 		// TODO needs to be moved to a more appropriate spot, where ColaSynch'er
>@@ -508,6 +641,7 @@
> 	}
> 
> 	void localStopShare() {
>+		SelectionReceiver oldSelectionReceiver;
> 		synchronized (stateLock) {
> 			this.ourID = null;
> 			this.initiatorID = null;
>@@ -516,8 +650,20 @@
> 			final IDocument doc = getDocumentFromEditor();
> 			if (doc != null)
> 				doc.removeDocumentListener(documentListener);
>+			if (this.editor != null) {
>+				ISelectionProvider selectionProvider = this.editor.getSelectionProvider();
>+				if (selectionProvider instanceof IPostSelectionProvider) {
>+					((IPostSelectionProvider) selectionProvider).removePostSelectionChangedListener(selectionListener);
>+				}
>+			}
>+			oldSelectionReceiver = this.selectionReceiver;
>+			this.selectionReceiver = null;
> 			this.editor = null;
> 		}
>+
>+		if (oldSelectionReceiver != null) {
>+			oldSelectionReceiver.dispose();
>+		}
> 		// clean up if necessary
> 		// TODO abstract this to work for SynchronizationStrategy
> 		ColaSynchronizer.cleanUpFor(this);
>@@ -534,6 +680,16 @@
> 		}
> 	}
> 
>+	void sendSelectionMsg(SelectionMessage msg) {
>+		if (isSharing()) {
>+			try {
>+				send(getOtherID(), msg);
>+			} catch (final Exception e) {
>+				logError(Messages.DocShare_EXCEPTION_SEND_MESSAGE, e);
>+			}
>+		}
>+	}
>+
> 	void sendStopMessage() {
> 		sendStopMessage(getOtherID());
> 	}
>Index: plugin.xml
>===================================================================
>RCS file: /cvsroot/technology/org.eclipse.ecf/plugins/org.eclipse.ecf.docshare/plugin.xml,v
>retrieving revision 1.4
>diff -u -r1.4 plugin.xml
>--- plugin.xml	16 Jun 2008 04:58:27 -0000	1.4
>+++ plugin.xml	18 Jul 2008 08:52:02 -0000
>@@ -29,5 +29,53 @@
>       </menuContribution>
>    </extension>
> 
>+   <extension
>+         point="org.eclipse.ui.editors.annotationTypes">
>+      <type
>+            name="org.eclipse.ecf.docshare.annotations.RemoteSelection">
>+      </type>
>+      <type
>+            name="org.eclipse.ecf.docshare.annotations.RemoteCursor"
>+            super="org.eclipse.ecf.docshare.annotations.RemoteSelection">
>+      </type>
>+   </extension>
>+   <extension
>+         point="org.eclipse.ui.editors.markerAnnotationSpecification">
>+      <specification
>+            annotationType="org.eclipse.ecf.docshare.annotations.RemoteSelection"
>+            colorPreferenceKey="remoteSelectionColor"
>+            colorPreferenceValue="231,223,143"
>+            contributesToHeader="false"
>+            highlightPreferenceKey="remoteSelectionHighlighting"
>+            highlightPreferenceValue="true"
>+            includeOnPreferencePage="true"
>+            label="Remote Selection"
>+            overviewRulerPreferenceKey="remoteSelectionIndicationInOverviewRuler"
>+            overviewRulerPreferenceValue="true"
>+            presentationLayer="5"
>+            textPreferenceKey="remoteSelectionTextIndication"
>+            textPreferenceValue="false"
>+            textStylePreferenceKey="remoteSelectionTextIndicationStyle"
>+            textStylePreferenceValue="NONE">
>+      </specification>
>+      <specification
>+            annotationType="org.eclipse.ecf.docshare.annotations.RemoteCursor"
>+            colorPreferenceKey="remoteCursorColor"
>+            colorPreferenceValue="166,138,60"
>+            contributesToHeader="false"
>+            highlightPreferenceKey="remoteCursorHighlighting"
>+            highlightPreferenceValue="false"
>+            includeOnPreferencePage="true"
>+            label="Remote Cursor"
>+            overviewRulerPreferenceKey="remoteCursorIndicationInOverviewRuler"
>+            overviewRulerPreferenceValue="true"
>+            presentationLayer="5"
>+            textPreferenceKey="remoteCursorTextIndication"
>+            textPreferenceValue="true"
>+            textStylePreferenceKey="remoteCursorTextIndicationStyle"
>+            textStylePreferenceValue="IBEAM">
>+      </specification>
>+   </extension>
>+
>    
> </plugin>

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Attachments on bug 237923: 105592 | 106058 | 106252 | 107805 | 126503