X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.ui%2Fsrc%2Forg%2Fsimantics%2Fui%2Fdnd%2FLocalObjectTransfer.java;fp=bundles%2Forg.simantics.ui%2Fsrc%2Forg%2Fsimantics%2Fui%2Fdnd%2FLocalObjectTransfer.java;h=0e32e8740987a0e943091d249cee0d6322a08402;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.ui/src/org/simantics/ui/dnd/LocalObjectTransfer.java b/bundles/org.simantics.ui/src/org/simantics/ui/dnd/LocalObjectTransfer.java
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index 000000000..0e32e8740
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+++ b/bundles/org.simantics.ui/src/org/simantics/ui/dnd/LocalObjectTransfer.java
@@ -0,0 +1,148 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.ui.dnd;
+
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.FlavorTable;
+import java.awt.datatransfer.SystemFlavorMap;
+import java.util.Map;
+
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.jface.resource.JFaceResources;
+import org.eclipse.jface.util.Policy;
+import org.eclipse.swt.dnd.ByteArrayTransfer;
+import org.eclipse.swt.dnd.TransferData;
+
+import sun.awt.datatransfer.DataTransferer;
+
+public class LocalObjectTransfer extends ByteArrayTransfer {
+
+    // First attempt to create a UUID for the type name to make sure that
+    // different Eclipse applications use different "types" of
+    // <code>LocalSelectionTransfer</code>
+	public static final String TYPE_NAME = SystemFlavorMap.encodeJavaMIMEType(LocalObjectTransferable.TYPE_NAME);
+	
+	private static int getMapping() {
+
+		for(Map.Entry<DataFlavor, String> entry : SystemFlavorMap.getDefaultFlavorMap().getNativesForFlavors(new DataFlavor[] { LocalObjectTransferable.FLAVOR }).entrySet()) {
+			for(long l : DataTransferer.getInstance().getFormatsForFlavorAsArray(entry.getKey(), (FlavorTable)SystemFlavorMap.getDefaultFlavorMap())) {
+				return (int)l;
+			}
+		}
+		
+		throw new Error("No mapping.");
+		
+	}
+	// In Linux (Ubuntu 14.04) using SystemFlavorMap to get the type id gives different result than what is received with drop data (TransferData.type) 
+    private static final int TYPEID = registerType(TYPE_NAME);//getMapping();
+    
+	private static final LocalObjectTransfer INSTANCE = new LocalObjectTransfer();
+
+    Object transferredObject;
+
+    /**
+     * Only the singleton instance of this class may be used. 
+     */
+    protected LocalObjectTransfer() {
+        // do nothing
+    }
+
+    /**
+     * Returns the singleton.
+     * 
+     * @return the singleton
+     */
+    public static LocalObjectTransfer getTransfer() {
+        return INSTANCE;
+    }
+
+    /**
+     * Tests whether native drop data matches this transfer type.
+     * 
+     * @param result result of converting the native drop data to Java
+     * @return true if the native drop data does not match this transfer type.
+     * 	false otherwise.
+     */
+    private boolean isInvalidNativeType(Object result) {
+        return !(result instanceof byte[])
+                || !TYPE_NAME.equals(new String((byte[]) result));
+    }
+
+    /**
+     * Returns the type id used to identify this transfer.
+     * 
+     * @return the type id used to identify this transfer.
+     */
+    protected int[] getTypeIds() {
+    	return new int[] { TYPEID };
+    }
+
+    /**
+     * Returns the type name used to identify this transfer.
+     * 
+     * @return the type name used to identify this transfer.
+     */
+    protected String[] getTypeNames() {
+        return new String[] { TYPE_NAME };
+    }
+
+    /**
+     * Overrides org.eclipse.swt.dnd.ByteArrayTransfer#javaToNative(Object,
+     * TransferData).
+     * Only encode the transfer type name since the selection is read and
+     * written in the same process.
+     * 
+     * @see org.eclipse.swt.dnd.ByteArrayTransfer#javaToNative(java.lang.Object, org.eclipse.swt.dnd.TransferData)
+     */
+    public void javaToNative(Object object, TransferData transferData) {
+    	//System.out.println("javaToNative " + object);
+        transferredObject = object;
+        byte[] check = TYPE_NAME.getBytes();
+        super.javaToNative(check, transferData);
+    }
+
+    /**
+     * Overrides org.eclipse.swt.dnd.ByteArrayTransfer#nativeToJava(TransferData).
+     * Test if the native drop data matches this transfer type.
+     * 
+     * @see org.eclipse.swt.dnd.ByteArrayTransfer#nativeToJava(TransferData)
+     */
+    public Object nativeToJava(TransferData transferData) {
+    	//System.out.println("nativeToJava " + transferredObject);
+        Object result = super.nativeToJava(transferData);
+        if (isInvalidNativeType(result)) {
+            Policy.getLog().log(new Status(
+                            IStatus.ERROR,
+                            Policy.JFACE,
+                            IStatus.ERROR,
+                            JFaceResources.getString("LocalObjectTransfer.errorMessage"), null)); //$NON-NLS-1$
+        }
+        return transferredObject;
+    }
+    
+    public void clear() {
+    	//System.out.println("LocalObjectTransfer clear");
+        transferredObject = null;
+    }
+    
+    public Object getObject() {
+    	//System.out.println("LocalObjectTransfer get " + transferredObject);
+        return transferredObject;
+    }
+    
+    public void setObject(Object object) {
+    	//System.out.println("LocalObjectTransfer set " + object);
+    	transferredObject = object;
+    }
+    
+}