1 files changed, 291 insertions, 0 deletions
diff --git a/deprecated/org.eclipse.papyrus.infra.gmfdiag.xtext.glue/src/org/eclipse/papyrus/infra/gmfdiag/xtext/glue/partialEditing/HighlightingReconciler.java b/deprecated/org.eclipse.papyrus.infra.gmfdiag.xtext.glue/src/org/eclipse/papyrus/infra/gmfdiag/xtext/glue/partialEditing/HighlightingReconciler.java
new file mode 100644
index 00000000000..bce3698527e
--- /dev/null
+++ b/deprecated/org.eclipse.papyrus.infra.gmfdiag.xtext.glue/src/org/eclipse/papyrus/infra/gmfdiag/xtext/glue/partialEditing/HighlightingReconciler.java
@@ -0,0 +1,291 @@
+/*******************************************************************************
+ * Copyright (c) 2010 itemis AG (http://www.itemis.eu) 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
+ *******************************************************************************/
+package org.eclipse.papyrus.infra.gmfdiag.xtext.glue.partialEditing;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.ITextInputListener;
+import org.eclipse.jface.text.TextAttribute;
+import org.eclipse.jface.text.TextPresentation;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.xtext.resource.XtextResource;
+import org.eclipse.xtext.ui.editor.XtextSourceViewer;
+import org.eclipse.xtext.ui.editor.model.IXtextDocument;
+import org.eclipse.xtext.ui.editor.model.IXtextModelListener;
+import org.eclipse.xtext.ui.editor.model.XtextDocument;
+import org.eclipse.xtext.ui.editor.syntaxcoloring.AttributedPosition;
+import org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingPresenter;
+import org.eclipse.xtext.ui.editor.syntaxcoloring.IHighlightedPositionAcceptor;
+import org.eclipse.xtext.ui.editor.syntaxcoloring.ISemanticHighlightingCalculator;
+import org.eclipse.xtext.ui.editor.syntaxcoloring.ITextAttributeProvider;
+import org.eclipse.xtext.ui.editor.syntaxcoloring.MergingHighlightedPositionAcceptor;
+import org.eclipse.xtext.util.concurrent.IUnitOfWork;
+
+import com.google.inject.Inject;
+
+/**
+ * @author Sebastian Zarnekow - Initial contribution and API
+ */
+public class HighlightingReconciler implements ITextInputListener, IXtextModelListener, IHighlightedPositionAcceptor {
+
+	@Inject(optional=true)
+	private ISemanticHighlightingCalculator calculator;
+	
+	@Inject
+	private ITextAttributeProvider attributeProvider;
+	
+	/** The source viewer this highlighting reconciler is installed on */
+	private XtextSourceViewer sourceViewer;
+	/** The highlighting presenter */
+	private HighlightingPresenter presenter;
+
+	/** Background job's added highlighted positions */
+	private final List<AttributedPosition> addedPositions = new ArrayList<AttributedPosition>();
+	/** Background job's removed highlighted positions */
+	private List<AttributedPosition> removedPositions = new ArrayList<AttributedPosition>();
+	/** Number of removed positions */
+	private int removedPositionCount;
+
+	/**
+	 * Reconcile operation lock.
+	 * 
+	 * @since 3.2
+	 */
+	private final Object fReconcileLock = new Object();
+	/**
+	 * <code>true</code> if any thread is executing <code>reconcile</code>, <code>false</code> otherwise.
+	 * 
+	 * @since 3.2
+	 */
+	private boolean reconciling = false;
+
+	/**
+	 * Start reconciling positions.
+	 */
+	private void startReconcilingPositions() {
+		presenter.addAllPositions(removedPositions);
+		removedPositionCount = removedPositions.size();
+	}
+
+	/**
+	 * Reconcile positions based on the AST subtrees
+	 * 
+	 * @param subtrees
+	 *            the AST subtrees
+	 */
+	private void reconcilePositions(XtextResource resource) {
+		//		for (int i= 0, n= subtrees.length; i < n; i++)
+		//			subtrees[i].accept(fCollector);
+		MergingHighlightedPositionAcceptor acceptor = new MergingHighlightedPositionAcceptor(calculator);
+		acceptor.provideHighlightingFor(resource, this);
+//		calculator.provideHighlightingFor(resource, this);
+		List<AttributedPosition> oldPositions = removedPositions;
+		List<AttributedPosition> newPositions = new ArrayList<AttributedPosition>(removedPositionCount);
+		for (int i = 0, n = oldPositions.size(); i < n; i++) {
+			AttributedPosition current = oldPositions.get(i);
+			if (current != null)
+				newPositions.add(current);
+		}
+		removedPositions = newPositions;
+	}
+	
+	/**
+	 * Add a position with the given range and highlighting if it does not exist already.
+	 * @param offset The range offset
+	 * @param length The range length
+	 * @param highlighting The highlighting
+	 */
+	public void addPosition(int offset, int length, String... ids) {
+		TextAttribute highlighting = ids.length == 1 ? 
+				attributeProvider.getAttribute(ids[0])
+			:	attributeProvider.getMergedAttributes(ids);
+		boolean isExisting= false;
+		// TODO: use binary search
+		for (int i= 0, n= removedPositions.size(); i < n; i++) {
+			AttributedPosition position= removedPositions.get(i);
+			if (position == null)
+				continue;
+			if (position.isEqual(offset, length, highlighting)) {
+				isExisting= true;
+				removedPositions.set(i, null);
+				removedPositionCount--;
+				break;
+			}
+		}
+
+		if (!isExisting) {
+			AttributedPosition position= presenter.createHighlightedPosition(offset, length, highlighting);
+			addedPositions.add(position);
+		}
+	}
+
+	/**
+	 * Update the presentation.
+	 * 
+	 * @param textPresentation
+	 *            the text presentation
+	 * @param addedPositions
+	 *            the added positions
+	 * @param removedPositions
+	 *            the removed positions
+	 */
+	private void updatePresentation(TextPresentation textPresentation, List<AttributedPosition> addedPositions,
+			List<AttributedPosition> removedPositions) {
+		Runnable runnable = presenter.createUpdateRunnable(textPresentation, addedPositions, removedPositions);
+		if (runnable == null)
+			return;
+
+		Display display = getDisplay();
+		display.asyncExec(runnable);
+	}
+	
+	private Display getDisplay() {
+		return this.sourceViewer.getControl().getDisplay();
+	}
+
+	/**
+	 * Stop reconciling positions.
+	 */
+	private void stopReconcilingPositions() {
+		removedPositions.clear();
+		removedPositionCount = 0;
+		addedPositions.clear();
+	}
+
+	/**
+	 * Install this reconciler on the given editor and presenter.
+	 * 
+	 * @param editor
+	 *            the editor
+	 * @param sourceViewer
+	 *            the source viewer
+	 * @param presenter
+	 *            the highlighting presenter
+	 */
+	public void install(XtextSourceViewer sourceViewer, HighlightingPresenter presenter) {
+		this.presenter = presenter;
+		this.sourceViewer = sourceViewer;
+		if (calculator != null) {
+			((IXtextDocument) sourceViewer.getDocument()).addModelListener(this);
+			sourceViewer.addTextInputListener(this);
+		}
+		refresh();
+	}
+
+	/**
+	 * Uninstall this reconciler from the editor
+	 */
+	public void uninstall() {
+		if (presenter != null)
+			presenter.setCanceled(true);
+
+		if (sourceViewer.getDocument() != null) {
+			if (calculator != null) {
+				XtextDocument document = (XtextDocument) sourceViewer.getDocument();
+				document.removeModelListener(this);
+				sourceViewer.removeTextInputListener(this);
+			}
+		}
+
+		sourceViewer = null;
+		presenter = null;
+	}
+
+	/*
+	 * @see org.eclipse.jface.text.ITextInputListener#inputDocumentAboutToBeChanged(org.eclipse.jface.text.IDocument, org.eclipse.jface.text.IDocument)
+	 */
+	public void inputDocumentAboutToBeChanged(IDocument oldInput, IDocument newInput) {
+		if (oldInput != null)
+			((IXtextDocument) oldInput).removeModelListener(this);
+	}
+
+	/*
+	 * @see org.eclipse.jface.text.ITextInputListener#inputDocumentChanged(org.eclipse.jface.text.IDocument, org.eclipse.jface.text.IDocument)
+	 */
+	public void inputDocumentChanged(IDocument oldInput, IDocument newInput) {
+		if (newInput != null) {
+			refresh();
+			((IXtextDocument) newInput).addModelListener(this);
+		}
+	}
+
+	/**
+	 * Refreshes the highlighting.
+	 */
+	public void refresh() {
+		if (calculator != null) {
+			((XtextDocument) sourceViewer.getDocument()).readOnly(new IUnitOfWork.Void<XtextResource>() {
+				@Override
+				public void process(XtextResource state) throws Exception {
+					modelChanged(state);
+				}
+			});
+		} else {
+			Display display = getDisplay();
+			display.asyncExec(presenter.createSimpleUpdateRunnable());
+		}
+	}
+
+	public void modelChanged(XtextResource resource) {
+		// ensure at most one thread can be reconciling at any time
+		synchronized (fReconcileLock) {
+			if (reconciling)
+				return;
+			reconciling = true;
+		}
+		final HighlightingPresenter highlightingPresenter = presenter;
+		try {
+			if (highlightingPresenter == null)
+				return;
+
+			highlightingPresenter.setCanceled(false);
+			
+			if (highlightingPresenter.isCanceled())
+				return;
+
+			startReconcilingPositions();
+
+			if (!highlightingPresenter.isCanceled()) {
+				reconcilePositions(resource);
+			}
+
+			final TextPresentation[] textPresentation = new TextPresentation[1];
+			if (!highlightingPresenter.isCanceled()) {
+				textPresentation[0] = highlightingPresenter.createPresentation(addedPositions, removedPositions);
+			}
+
+			if (!highlightingPresenter.isCanceled())
+				updatePresentation(textPresentation[0], addedPositions, removedPositions);
+
+			stopReconcilingPositions();
+		}
+		finally {
+			synchronized (fReconcileLock) {
+				reconciling = false;
+			}
+		}
+	}
+
+	/**
+	 * @param calculator 
+	 *
+	 */
+	public void setCalculator(ISemanticHighlightingCalculator calculator) {
+		this.calculator = calculator;
+	}
+
+	/**
+	 * @return ISemanticHighlightingCalculator
+	 *
+	 */
+	public ISemanticHighlightingCalculator getCalculator() {
+		return calculator;
+	}
+}