Attachment 39900 Details for Bug 31841 – Clipboard class supporting delete-on-paste

[patch] Clipboard class supporting delete-on-paste

Clipboard_supporting_Delete_On_Paste.txt (text/plain), 4.95 KB, created by Thomas Braun

on 2006-04-30 04:01:55 EDT

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Filename:

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Creator: Thomas Braun

Created: 2006-04-30 04:01:55 EDT

Size: 4.95 KB

patch

obsolete

>~~~~~~~~~~~~~~~~~~~
>~~ Clipboard.java
>~~~~~~~~~~~~~~~~~~~
>~~ Shows only the modifications.
>~~ Unchanged code segments are indicated by "..."
>
>package org.eclipse.swt.dnd;
>
>...
>
>public class Clipboard
>{
>	private int preferredDropEffect = COM.DROPEFFECT_COPY;
>
>	...
>
>	private int GetData(int pFormatetc, int pmedium)
>	{
>		...
>		if (transferData.type == CFSTR_PREFERREDDROPEFFECT) {
>			...
>			OS.MoveMemory(stgmedium.unionField,
>				new int[]{ preferredDropEffect }, 4);
>			...
>		}
>	}
>
>	public void setContents(Object[] data, Transfer[] dataTypes)
>	{
>		setContents(DND.DROP_COPY, data, dataTypes, DND.CLIPBOARD);
>	}
>
>	public void setContents(int preferredDropEffect, Object[] data,
>		Transfer[] dataTypes)
>	{
>		setContents(preferredDropEffect, data, dataTypes, DND.CLIPBOARD);
>	}
>
>	public void setContents(Object[] data, Transfer[] dataTypes,
>		int clipboards)
>	{
>		setContents(DND.DROP_COPY, data, dataTypes, clipboards);
>	}
>
>	public void setContents(int preferredDropEffect, Object[] data,
>		Transfer[] dataTypes, int clipboards)
>	{
>		if ((preferredDropEffect & DND.DROP_MOVE) != 0)
>			preferredDropEffect = COM.DROPEFFECT_MOVE;
>		else
>			preferredDropEffect = COM.DROPEFFECT_COPY;
>		this.preferredDropEffect = preferredDropEffect;
>
>		... the contents of the original method setContents(Object[], Transfer, int)
>	}
>
>	/**
>	 * Returns the preferred drop effect. If none is available DND.DROP_COPY
>	 * is returned.
>	 *
>	 * @return the preferred drop effect
>	 */
>	public int getPreferredDropEffect()
>	{
>		PreferredDropEffectTransfer pdet = PreferredDropEffectTransfer
>			.getInstance();
>		Integer effect = (Integer) getContents(pdet);
>		if (effect == null)
>			return DND.DROP_COPY;
>		else
>			return effect.intValue();
>	}
>}
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>~~ PreferredDropEffectTransfer.java
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>package org.eclipse.swt.dnd;
>
>
>import org.eclipse.swt.internal.ole.win32.COM;
>import org.eclipse.swt.internal.ole.win32.FORMATETC;
>import org.eclipse.swt.internal.ole.win32.IDataObject;
>import org.eclipse.swt.internal.ole.win32.STGMEDIUM;
>import org.eclipse.swt.internal.win32.OS;
>
>
>/**
> * Used to read the preferred drop effect from the clipboard.
> *
> * @author Thomas Braun
> */
>class PreferredDropEffectTransfer extends ByteArrayTransfer
>{
>	private static PreferredDropEffectTransfer _instance =
>		new PreferredDropEffectTransfer();
>	private static final String CFSTR_PREFERREDDROPEFFECT =
>		"Preferred DropEffect"; //$NON-NLS-1$
>	private static final int CF_ID =
>		registerType(CFSTR_PREFERREDDROPEFFECT);
>
>	private PreferredDropEffectTransfer()
>	{}
>
>	/**
>	 * Returns the singleton instance of the class.
>	 *
>	 * @return the singleton instance of the class
>	 */
>	public static PreferredDropEffectTransfer getInstance()
>	{
>		return _instance;
>	}
>
>	/**
>	 * Not needed.
>	 */
>	@Override
>	public void javaToNative(Object object, TransferData transferData)
>	{
>	}
>
>	/**
>	 * The method returns the preferred drop operation as integer object.
>	 * The default result is DND.DROP_COPY.
>	 *
>	 * @see DND#DROP_COPY
>	 * @see DND#DROP_LINK
>	 * @see DND#DROP_MOVE
>	 * @return an <code>Integer</code> containing the preferred drop operation
>	 */
>	@Override
>	public Object nativeToJava(TransferData transferData)
>	{
>		if (!isSupportedType(transferData) || transferData.pIDataObject == 0)
>			return DND.DROP_COPY;
>
>		IDataObject dataObject = new IDataObject(transferData.pIDataObject);
>		dataObject.AddRef();
>		FORMATETC formatetc = new FORMATETC();
>		formatetc.cfFormat = CF_ID;
>		formatetc.ptd = 0;
>		formatetc.dwAspect = COM.DVASPECT_CONTENT;
>		formatetc.lindex = -1;
>		formatetc.tymed = COM.TYMED_HGLOBAL;
>		STGMEDIUM stgmedium = new STGMEDIUM();
>		stgmedium.tymed = COM.TYMED_HGLOBAL;
>		transferData.result = dataObject.GetData(formatetc, stgmedium);
>		int[] i1 = new int[1];
>		OS.MoveMemory(i1, stgmedium.unionField, 4);
>		int res = 0;
>		if (i1[0] < 100) {	// i1 contains the preferred drop effect value
>			res = i1[0];
>		}
>		else {				// i1 contains the address of the preferred drop
>							// effect value
>			int[] i2 = new int[1];
>			OS.MoveMemory(i2, i1[0], 4);
>			res = i2[0];
>		}
>		dataObject.Release();
>
>		if (transferData.result != COM.S_OK)
>			return DND.DROP_COPY;
>		else
>			return osToOp(res);
>	}
>
>	@Override
>	protected int[] getTypeIds()
>	{
>		return new int[]{
>			CF_ID
>		};
>	}
>
>	private int osToOp(int osOperation)
>	{
>		int operation = 0;
>		if ((osOperation & COM.DROPEFFECT_COPY) != 0) {
>			operation |= DND.DROP_COPY;
>		}
>		if ((osOperation & COM.DROPEFFECT_LINK) != 0) {
>			operation |= DND.DROP_LINK;
>		}
>		if ((osOperation & COM.DROPEFFECT_MOVE) != 0) {
>			operation |= DND.DROP_MOVE;
>		}
>		return operation;
>	}
>
>	@Override
>	protected String[] getTypeNames()
>	{
>		return new String[]{
>			CFSTR_PREFERREDDROPEFFECT
>		};
>	}
>
>	@Override
>	protected boolean validate(Object object)
>	{
>		return object instanceof Integer;
>	}
>}

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Attachments on bug 31841: 39258 | 39900