Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.utils.ui / src / org / simantics / utils / ui / gfx / clipboard / ImageDataTransfer.java

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/clipboard/ImageDataTransfer.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/clipboard/ImageDataTransfer.java
new file mode 100644 (file)
index 0000000..19049c3
--- /dev/null
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/clipboard/ImageDataTransfer.java
@@ -0,0 +1,106 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.utils.ui.gfx.clipboard;\r
+\r
+import java.io.ByteArrayInputStream;\r
+import java.io.ByteArrayOutputStream;\r
+import java.io.IOException;\r
+import java.io.InputStream;\r
+\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.dnd.ByteArrayTransfer;\r
+import org.eclipse.swt.dnd.TransferData;\r
+import org.eclipse.swt.graphics.ImageData;\r
+import org.eclipse.swt.graphics.ImageLoader;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+import org.simantics.utils.ui.gfx.clipboard.headers.Win32Constants;\r
+import org.simantics.utils.ui.gfx.clipboard.streams.AddBitmapHeaderInputStream;\r
+import org.simantics.utils.ui.gfx.clipboard.streams.RemoveBitmapHeaderOutputStream;\r
+import org.simantics.utils.ui.gfx.clipboard.streams.UncompressedDIBInputStream;\r
+\r
+\r
+/**\r
+ * Transfer class for handing image cut/copy/paste operations between Eclipse\r
+ * and native WIN32 apps\r
+ * \r
+ * @author Marko Luukkainen\r
+ *\r
+ */\r
+public class ImageDataTransfer extends ByteArrayTransfer {\r
+\r
+    private static final ImageDataTransfer instance = new ImageDataTransfer();\r
+\r
+    private static final String CF_DIB = "CF_DIB";\r
+\r
+    private ImageDataTransfer() {\r
+        //\r
+    }\r
+\r
+    public static ImageDataTransfer getInstance() {\r
+        return ImageDataTransfer.instance;\r
+    }\r
+\r
+    /* (non-Javadoc)\r
+     * @see org.eclipse.swt.dnd.Transfer#getTypeIds()\r
+     */\r
+    @Override\r
+    protected final int[] getTypeIds() {\r
+        return new int[] { Win32Constants.CF_DIB };\r
+    }\r
+\r
+    /* (non-Javadoc)\r
+     * @see org.eclipse.swt.dnd.Transfer#getTypeNames()\r
+     */\r
+    @Override\r
+    protected final String[] getTypeNames() {\r
+        return new String[] { ImageDataTransfer.CF_DIB };\r
+    }\r
+\r
+    /* (non-Javadoc)\r
+     * @see org.eclipse.swt.dnd.ByteArrayTransfer#nativeToJava(org.eclipse.swt.dnd.TransferData)\r
+     */\r
+    @Override\r
+    protected Object nativeToJava(TransferData transferData) {\r
+        final Object o = super.nativeToJava(transferData);\r
+        final byte[] bytes = (byte[]) o;\r
+\r
+        try {\r
+            final InputStream iStream = new AddBitmapHeaderInputStream(\r
+                    new UncompressedDIBInputStream(new ByteArrayInputStream(\r
+                            bytes)));\r
+            final ImageData[] data = new ImageLoader().load(iStream);\r
+            if (data.length <= 0) {\r
+                return null;\r
+            }\r
+            return data[0];\r
+        } catch (IOException e) {\r
+            ErrorLogger.defaultLogError("Cannot get image from clipboard", e);\r
+            return null;\r
+        }\r
+    }\r
+\r
+    /* (non-Javadoc)\r
+     * @see org.eclipse.swt.dnd.ByteArrayTransfer#javaToNative(java.lang.Object, org.eclipse.swt.dnd.TransferData)\r
+     */\r
+    @Override\r
+    protected void javaToNative(Object object, TransferData transferData) {\r
+        final ImageData imgData = (ImageData) object;\r
+        final ImageLoader loader = new ImageLoader();\r
+        final ByteArrayOutputStream oStream = new ByteArrayOutputStream();\r
+        final byte[] bytes;\r
+\r
+        loader.data = new ImageData[] { imgData };\r
+        loader.save(new RemoveBitmapHeaderOutputStream(oStream), SWT.IMAGE_BMP);\r
+        bytes = oStream.toByteArray();\r
+        super.javaToNative(bytes, transferData);\r
+    }\r
+}\r