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/*******************************************************************************
* Copyright (c) 2008, 2009 Andrew Gvozdev.
* 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:
* Andrew Gvozdev (Quoin Inc.) - Initial implementation
*******************************************************************************/
package org.eclipse.cdt.make.internal.ui.dnd;
import org.eclipse.cdt.make.core.IMakeCommonBuildInfo;
import org.eclipse.cdt.make.core.IMakeTarget;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
/**
* {@code TextTransferDragSourceListener} supports dragging of selected make
* targets from Make Target View. The targets converted to make commands in
* order to be presented as plain text. Each command will be one line of text.
* {@link TextTransfer} is used as the transfer agent.
*
* @see AbstractSelectionDragAdapter
* @see org.eclipse.swt.dnd.DragSourceListener
*/
public class TextTransferDragSourceListener extends AbstractSelectionDragAdapter {
/**
* Constructor setting selection provider.
* @param provider - selection provider.
*/
public TextTransferDragSourceListener(ISelectionProvider provider) {
super(provider);
}
/**
* @return the {@link Transfer} type that this listener can accept a
* drop operation for.
*/
@Override
public Transfer getTransfer() {
return TextTransfer.getInstance();
}
/**
* Checks if the elements contained in the given selection can be dragged.
*
* @param selection - the selected elements to be dragged.
* @return {@code true} if the selection can be dragged.
*/
@Override
protected boolean isDragable(ISelection selection) {
return MakeTargetDndUtil.isDragable(selection);
}
/**
* A custom action executed during drag initialization.
*
* @param selection - the selected elements to be dragged.
*/
@Override
protected void dragInit(ISelection selection) {
// no special action is required
}
/**
* Prepare the selection to be passed via drag and drop actions.
*
* @param selection - the selected elements to be dragged.
* @return data to be passed. The data is a multiline string each line
* containing make target command.
*/
@Override
protected Object prepareDataForTransfer(ISelection selection) {
if (selection instanceof IStructuredSelection) {
return convertSelectedMakeTargetsToText((IStructuredSelection) selection);
}
return null;
}
/**
* A custom action to finish the drag.
*/
@Override
protected void dragDone() {
// no special action is required
}
/**
* Convert selected make targets to textual representation. Each make command
* is presented as a line in the resulting multiline text.
*
* @param selection - selected make targets in Make Target View.
* @return make targets as miltiline text.
*/
public static String convertSelectedMakeTargetsToText(IStructuredSelection selection) {
String targetsText=""; //$NON-NLS-1$
for (Object selectionItem : selection.toList()) {
if (selectionItem instanceof IMakeTarget) {
IMakeTarget makeTarget = (IMakeTarget)selectionItem;
String buildCommand;
if (makeTarget.isDefaultBuildCmd()) {
buildCommand = MakeTargetDndUtil.getProjectBuildCommand(makeTarget.getProject());
} else {
buildCommand =makeTarget.getBuildAttribute(IMakeCommonBuildInfo.BUILD_COMMAND,
MakeTargetDndUtil.DEFAULT_BUILD_COMMAND);
}
String buildCommandArguments = makeTarget.getBuildAttribute(IMakeCommonBuildInfo.BUILD_ARGUMENTS, "").trim(); //$NON-NLS-1$
if (buildCommandArguments.length()>0) {
buildCommandArguments = ' ' + buildCommandArguments;
}
String buildTarget = makeTarget.getBuildAttribute(IMakeTarget.BUILD_TARGET, "").trim(); //$NON-NLS-1$
if (buildTarget.length()>0) {
buildTarget = ' ' + buildTarget;
}
targetsText = targetsText + buildCommand + buildCommandArguments + buildTarget
+ System.getProperty("line.separator"); //$NON-NLS-1$
}
}
return targetsText;
}
}
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