Updated the xtext editors not to have an intermediate file for the editing.

1 files changed, 151 insertions, 0 deletions

diff --git a/plugins/core/org.eclipse.xtext.gmf.glue/src/org/eclipse/xtext/gmf/glue/partialEditing/PartialModelEditor.java b/plugins/core/org.eclipse.xtext.gmf.glue/src/org/eclipse/xtext/gmf/glue/partialEditing/PartialModelEditor.java
new file mode 100644
index 00000000000..0499773fd0a
--- /dev/null
+++ b/plugins/core/org.eclipse.xtext.gmf.glue/src/org/eclipse/xtext/gmf/glue/partialEditing/PartialModelEditor.java
@@ -0,0 +1,151 @@
+package org.eclipse.xtext.gmf.glue.partialEditing;
+
+import java.util.Collections;
+
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ISynchronizable;
+import org.eclipse.jface.text.source.AnnotationModel;
+import org.eclipse.jface.text.source.SourceViewer;
+import org.eclipse.xtext.resource.XtextResource;
+import org.eclipse.xtext.ui.editor.model.XtextDocument;
+import org.eclipse.xtext.util.StringInputStream;
+
+/**
+ * 
+ */
+public class PartialModelEditor {
+
+	private final SourceViewer viewer;
+	private final boolean insertLineBreaks;
+	private final ISyntheticResourceProvider resourceProvider;
+	//private final Injector xtextInjector ;
+
+	/**
+	 * @param viewer 
+	 * @param resourceProvider 
+	 * @param insertLineBreaks 
+	 *
+	 */
+	public PartialModelEditor(SourceViewer viewer, ISyntheticResourceProvider resourceProvider, boolean insertLineBreaks) {
+		//this.xtextInjector = xtextInjector ;
+		this.viewer = viewer;
+		this.resourceProvider = resourceProvider;
+		this.insertLineBreaks = insertLineBreaks;
+	}
+	
+	/**
+	 * @param document 
+	 * @param prefix 
+	 * @param editablePart 
+	 * @param suffix 
+	 *
+	 */
+	public void setModel(XtextDocument document, String prefix, String editablePart, String suffix) {
+		if (insertLineBreaks) {
+			String delimiter = document.getLegalLineDelimiters()[0];
+			prefix = prefix + delimiter;
+			suffix = delimiter + suffix;
+		}
+		String model = prefix + editablePart + suffix;
+		document.set(model);
+		XtextResource resource = createResource(model);
+		document.setInput(resource);
+		AnnotationModel annotationModel = new AnnotationModel();
+		if (document instanceof ISynchronizable) {
+			Object lock= ((ISynchronizable)document).getLockObject();
+			if (lock == null) {
+				lock= new Object();
+				((ISynchronizable)document).setLockObject(lock);
+			}
+			((ISynchronizable) annotationModel).setLockObject(lock);
+		}
+		viewer.setDocument(document, annotationModel, prefix.length(), editablePart.length());
+		viewer.getUndoManager().reset();
+	}
+	
+	/**
+	 * @param content 
+	 * @return XtextResource
+	 *
+	 */
+	public XtextResource createResource(String content) {
+		XtextResource result = resourceProvider.createResource();
+		try {
+			result.load(new StringInputStream(content, result.getEncoding()), Collections.emptyMap());
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+		return result;
+	}
+	
+	/**
+	 * @param prefix 
+	 * @param editablePart 
+	 * @param suffix 
+	 *
+	 */
+	public void updateModel(String prefix, String editablePart, String suffix) {
+		IDocument document= viewer.getDocument();
+		if (insertLineBreaks) {
+			String delimiter = document.getLegalLineDelimiters()[0];
+			prefix = prefix + delimiter;
+			suffix = delimiter + suffix;
+		}
+		String model = prefix + editablePart + suffix;
+		viewer.setRedraw(false);
+		viewer.getUndoManager().disconnect();
+		document.set(model);
+		viewer.setVisibleRegion(prefix.length(), editablePart.length());
+		viewer.getUndoManager().connect(viewer);
+		viewer.setRedraw(true);
+	}
+	
+	/**
+	 * @param prefix 
+	 *
+	 */
+	public void updatePrefix(String prefix) {
+		try {
+			IDocument document= viewer.getDocument();
+			IRegion visibleRegion = viewer.getVisibleRegion();
+			String editablePart = document.get(visibleRegion.getOffset(), visibleRegion.getLength());
+			int suffixOffset = visibleRegion.getOffset() + visibleRegion.getLength();
+			String suffix = "";
+			if (document.getLength() - suffixOffset > 0) {
+				suffix = document.get(suffixOffset, document.getLength() - suffixOffset);	
+				if (insertLineBreaks) {
+					String delimiter = document.getLegalLineDelimiters()[0];
+					suffix = suffix.substring(delimiter.length());
+				}
+			}
+			updateModel(prefix, editablePart, suffix);
+		} catch(BadLocationException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	/**
+	 * @return String
+	 *
+	 */
+	public String getEditablePart() {
+		IDocument doc= viewer.getDocument();
+		IRegion visible= viewer.getVisibleRegion();
+		try {
+			return doc.get(visible.getOffset(), visible.getLength());
+		} catch (BadLocationException e) {
+			return ""; //$NON-NLS-1$
+		}
+	}
+	
+	/**
+	 * @return String
+	 *
+	 */
+	public String getSerializedModel() {
+		return viewer.getDocument().get();
+	}
+	
+}