jsf/plugins/org.eclipse.jst.jsf.facesconfig.ui/src/org/eclipse/jst/jsf/facesconfig/ui/pageflow/action/AlignmentAction.java - jsf/webtools.jsf - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2005 Sybase, Inc. and others.
  *
  * 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:
  *     Sybase, Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jst.jsf.facesconfig.ui.pageflow.action;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.draw2d.PositionConstants;
 import org.eclipse.draw2d.geometry.PrecisionRectangle;
 import org.eclipse.draw2d.geometry.Rectangle;
 import org.eclipse.gef.EditPart;
 import org.eclipse.gef.GraphicalEditPart;
 import org.eclipse.gef.Request;
 import org.eclipse.gef.RequestConstants;
 import org.eclipse.gef.commands.Command;
 import org.eclipse.gef.commands.CompoundCommand;
 import org.eclipse.gef.requests.AlignmentRequest;
 import org.eclipse.gef.tools.ToolUtilities;
 import org.eclipse.gef.ui.actions.GEFActionConstants;
 import org.eclipse.gef.ui.actions.SelectionAction;
 import org.eclipse.jst.jsf.facesconfig.ui.EditorMessages;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.IWorkbenchPart;

 /**
  * An improved alignment action to align the selected parts in different action.
  *
  * @author xgzhang
  * @version original version is from GEF
  */
 public final class AlignmentAction extends SelectionAction {

 	/**
 	 * Indicates that the bottom edges should be aligned.
 	 */
 	public static final String ID_ALIGN_BOTTOM = GEFActionConstants.ALIGN_BOTTOM;

 	/**
 	 * Indicates that the horizontal centers should be aligned.
 	 */
 	public static final String ID_ALIGN_CENTER = GEFActionConstants.ALIGN_CENTER;

 	/**
 	 * Indicates that the left edges should be aligned.
 	 */
 	public static final String ID_ALIGN_LEFT = GEFActionConstants.ALIGN_LEFT;

 	/**
 	 * Indicates that the vertical midpoints should be aligned.
 	 */
 	public static final String ID_ALIGN_MIDDLE = GEFActionConstants.ALIGN_MIDDLE;

 	/**
 	 * Indicates that the right edges should be aligned.
 	 */
 	public static final String ID_ALIGN_RIGHT = GEFActionConstants.ALIGN_RIGHT;

 	/**
 	 * Indicates that the top edges should be aligned.
 	 */
 	public static final String ID_ALIGN_TOP = GEFActionConstants.ALIGN_TOP;

 	private int alignment;

 	private List operationSet;

 	/**
 	 * @deprecated use AlignmentAction(IWorkbenchPart, int align)
 	 * @param editor
 	 *            the editor
 	 * @param align
 	 *            the alignment ID
 	 */
 	public AlignmentAction(IEditorPart editor, int align) {
 		this((IWorkbenchPart) editor, align);
 	}

 	/**
 	 * Constructs an AlignmentAction with the given part and alignment ID. The
 	 * alignment ID must by one of:
 	 * <UL>
 	 * <LI>GEFActionConstants.ALIGN_LEFT
 	 * <LI>GEFActionConstants.ALIGN_RIGHT
 	 * <LI>GEFActionConstants.ALIGN_CENTER
 	 * <LI>GEFActionConstants.ALIGN_TOP
 	 * <LI>GEFActionConstants.ALIGN_BOTTOM
 	 * <LI>GEFActionConstants.ALIGN_MIDDLE
 	 * </UL>
 	 *
 	 * @param part
 	 *            the workbench part used to obtain context
 	 * @param align
 	 *            the aligment ID.
 	 */
 	public AlignmentAction(IWorkbenchPart part, int align) {
 		super(part);
 		alignment = align;
 		initUI();
 	}

 	/**
 	 * Returns the alignment rectangle to which all selected parts should be
 	 * aligned.
 	 *
 	 * @param request
 	 *            the alignment Request
 	 * @return the alignment rectangle
 	 */
 	protected Rectangle calculateAlignmentRectangle(Request request) {
 		List editparts = getOperationSet(request);
 		if (editparts == null || editparts.isEmpty()) {
 			return null;
 		}
 		GraphicalEditPart part = null;
 		if (alignment == PositionConstants.MIDDLE
 				|| alignment == PositionConstants.CENTER) {
 			part = (GraphicalEditPart) editparts.get(editparts.size() - 1);
 		} else {
 			part = getFitnessPart(editparts);
 		}
 		Rectangle rect = new PrecisionRectangle(part.getFigure().getBounds());
 		part.getFigure().translateToAbsolute(rect);
 		return rect;
 	}

 	/**
 	 * get the Fitness part in the four kinds of alignment directions
 	 *
 	 * @param editparts
 	 */
 	private GraphicalEditPart getFitnessPart(List editparts) {
 		if (alignment == PositionConstants.MIDDLE
 				|| alignment == PositionConstants.CENTER) {
 			return null;
 		}

 		int positionComparor = Integer.MAX_VALUE;

 		if (alignment == PositionConstants.LEFT
 				|| alignment == PositionConstants.TOP) {
 			positionComparor = Integer.MAX_VALUE;
 		} else if (alignment == PositionConstants.RIGHT
 				|| alignment == PositionConstants.BOTTOM) {
 			positionComparor = Integer.MIN_VALUE;
 		}

 		GraphicalEditPart fitnessPart = null;

 		for (Iterator iter = editparts.iterator(); iter.hasNext();) {
 			GraphicalEditPart part = (GraphicalEditPart) iter.next();
 			Rectangle rectPart = part.getFigure().getBounds();
 			switch (alignment) {
 			case PositionConstants.LEFT:
 				if (rectPart.getLeft().x < positionComparor) {
 					fitnessPart = part;
 					positionComparor = rectPart.getLeft().x;
 				}
 				break;

 			case PositionConstants.RIGHT:
 				if (rectPart.getRight().x > positionComparor) {
 					fitnessPart = part;
 					positionComparor = rectPart.getRight().x;
 				}
 				break;
 			case PositionConstants.TOP:
 				if (rectPart.getTop().y < positionComparor) {
 					fitnessPart = part;
 					positionComparor = rectPart.getTop().y;
 				}
 				break;
 			case PositionConstants.BOTTOM:
 				if (rectPart.getBottom().y > positionComparor) {
 					fitnessPart = part;
 					positionComparor = rectPart.getBottom().y;
 				}
 				break;
 			}
 		}

 		return fitnessPart;
 	}

 	/**
 	 * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
 	 */
 	protected boolean calculateEnabled() {
 		operationSet = null;
 		Command cmd = createAlignmentCommand();
 		if (cmd == null) {
 			return false;
 		}
 		return cmd.canExecute();
 	}

 	private Command createAlignmentCommand() {
 		AlignmentRequest request = new AlignmentRequest(
 				RequestConstants.REQ_ALIGN);
 		request.setAlignmentRectangle(calculateAlignmentRectangle(request));
 		request.setAlignment(alignment);
 		List editparts = getOperationSet(request);
 		if (editparts.size() < 2) {
 			return null;
 		}

 		CompoundCommand command = new CompoundCommand();
 		command.setDebugLabel(getText());
 		for (int i = 0; i < editparts.size(); i++) {
 			EditPart editpart = (EditPart) editparts.get(i);
 			command.add(editpart.getCommand(request));
 		}
 		return command;
 	}

 	/**
 	 * @see org.eclipse.gef.Disposable#dispose()
 	 */
 	public void dispose() {
 		operationSet = Collections.EMPTY_LIST;
 		super.dispose();
 	}

 	/**
 	 * Returns the list of editparts which will participate in alignment.
 	 *
 	 * @param request
 	 *            the alignment request
 	 * @return the list of parts which will be aligned
 	 */
 	protected List getOperationSet(Request request) {
 		if (operationSet != null) {
 			return operationSet;
 		}
 		List editparts = new ArrayList(getSelectedObjects());
 		if (editparts.isEmpty()
 				|| !(editparts.get(0) instanceof GraphicalEditPart)) {
 			return Collections.EMPTY_LIST;
 		}
 		Object primary = editparts.get(editparts.size() - 1);
 		editparts = ToolUtilities.getSelectionWithoutDependants(editparts);
 		ToolUtilities.filterEditPartsUnderstanding(editparts, request);
 		if (editparts.size() < 2 || !editparts.contains(primary)) {
 			return Collections.EMPTY_LIST;
 		}
 		EditPart parent = ((EditPart) editparts.get(0)).getParent();
 		for (int i = 1; i < editparts.size(); i++) {
 			EditPart part = (EditPart) editparts.get(i);
 			if (part.getParent() != parent) {
 				return Collections.EMPTY_LIST;
 			}
 		}
 		return editparts;
 	}

 	/**
 	 * Initializes the actions UI presentation.
 	 */
 	protected void initUI() {
 		switch (alignment) {
 		case PositionConstants.LEFT:
 			setId(GEFActionConstants.ALIGN_LEFT);
 			setText(EditorMessages.AlignmentAction_AlignLeftAction_Label);
 			setToolTipText(EditorMessages.AlignmentAction_AlignLeftAction_Tooltip);
 			setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_LEFT);
 			setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_LEFT_DIS);
 			break;

 		case PositionConstants.RIGHT:
 			setId(GEFActionConstants.ALIGN_RIGHT);
 			setText(EditorMessages.AlignmentAction_AlignRightAction_Label);
 			setToolTipText(EditorMessages.AlignmentAction_AlignRightAction_Tooltip);
 			setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_RIGHT);
 			setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_RIGHT_DIS);
 			break;

 		case PositionConstants.TOP:
 			setId(GEFActionConstants.ALIGN_TOP);
 			setText(EditorMessages.AlignmentAction_AlignTopAction_Label);
 			setToolTipText(EditorMessages.AlignmentAction_AlignTopAction_Tooltip);
 			setImageDescriptor(InternalImages.DESC_VERT_ALIGN_TOP);
 			setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_TOP_DIS);
 			break;

 		case PositionConstants.BOTTOM:
 			setId(GEFActionConstants.ALIGN_BOTTOM);
 			setText(EditorMessages.AlignmentAction_AlignBottomAction_Label);
 			setToolTipText(EditorMessages.AlignmentAction_AlignBottomAction_Tooltip);
 			setImageDescriptor(InternalImages.DESC_VERT_ALIGN_BOTTOM);
 			setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_BOTTOM_DIS);
 			break;

 		case PositionConstants.CENTER:
 			setId(GEFActionConstants.ALIGN_CENTER);
 			setText(EditorMessages.AlignmentAction_AlignCenterAction_Label);
 			setToolTipText(EditorMessages.AlignmentAction_AlignCenterAction_Tooltip);
 			setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_CENTER);
 			setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_CENTER_DIS);
 			break;

 		case PositionConstants.MIDDLE:
 			setId(GEFActionConstants.ALIGN_MIDDLE);
 			setText(EditorMessages.AlignmentAction_AlignMiddleAction_Label);
 			setToolTipText(EditorMessages.AlignmentAction_AlignMiddleAction_Tooltip);
 			setImageDescriptor(InternalImages.DESC_VERT_ALIGN_MIDDLE);
 			setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_MIDDLE_DIS);
 			break;
 		}
 	}

 	/**
 	 * @see org.eclipse.jface.action.IAction#run()
 	 */
 	public void run() {
 		operationSet = null;
 		execute(createAlignmentCommand());
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2004, 2005 Sybase, Inc. and others.
	*
	* 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:
	* Sybase, Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jst.jsf.facesconfig.ui.pageflow.action;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.draw2d.PositionConstants;
	import org.eclipse.draw2d.geometry.PrecisionRectangle;
	import org.eclipse.draw2d.geometry.Rectangle;
	import org.eclipse.gef.EditPart;
	import org.eclipse.gef.GraphicalEditPart;
	import org.eclipse.gef.Request;
	import org.eclipse.gef.RequestConstants;
	import org.eclipse.gef.commands.Command;
	import org.eclipse.gef.commands.CompoundCommand;
	import org.eclipse.gef.requests.AlignmentRequest;
	import org.eclipse.gef.tools.ToolUtilities;
	import org.eclipse.gef.ui.actions.GEFActionConstants;
	import org.eclipse.gef.ui.actions.SelectionAction;
	import org.eclipse.jst.jsf.facesconfig.ui.EditorMessages;
	import org.eclipse.ui.IEditorPart;
	import org.eclipse.ui.IWorkbenchPart;

	/**
	* An improved alignment action to align the selected parts in different action.
	*
	* @author xgzhang
	* @version original version is from GEF
	*/
	public final class AlignmentAction extends SelectionAction {

	/**
	* Indicates that the bottom edges should be aligned.
	*/
	public static final String ID_ALIGN_BOTTOM = GEFActionConstants.ALIGN_BOTTOM;

	/**
	* Indicates that the horizontal centers should be aligned.
	*/
	public static final String ID_ALIGN_CENTER = GEFActionConstants.ALIGN_CENTER;

	/**
	* Indicates that the left edges should be aligned.
	*/
	public static final String ID_ALIGN_LEFT = GEFActionConstants.ALIGN_LEFT;

	/**
	* Indicates that the vertical midpoints should be aligned.
	*/
	public static final String ID_ALIGN_MIDDLE = GEFActionConstants.ALIGN_MIDDLE;

	/**
	* Indicates that the right edges should be aligned.
	*/
	public static final String ID_ALIGN_RIGHT = GEFActionConstants.ALIGN_RIGHT;

	/**
	* Indicates that the top edges should be aligned.
	*/
	public static final String ID_ALIGN_TOP = GEFActionConstants.ALIGN_TOP;

	private int alignment;

	private List operationSet;

	/**
	* @deprecated use AlignmentAction(IWorkbenchPart, int align)
	* @param editor
	* the editor
	* @param align
	* the alignment ID
	*/
	public AlignmentAction(IEditorPart editor, int align) {
	this((IWorkbenchPart) editor, align);
	}

	/**
	* Constructs an AlignmentAction with the given part and alignment ID. The
	* alignment ID must by one of:
	* <UL>
	* <LI>GEFActionConstants.ALIGN_LEFT
	* <LI>GEFActionConstants.ALIGN_RIGHT
	* <LI>GEFActionConstants.ALIGN_CENTER
	* <LI>GEFActionConstants.ALIGN_TOP
	* <LI>GEFActionConstants.ALIGN_BOTTOM
	* <LI>GEFActionConstants.ALIGN_MIDDLE
	* </UL>
	*
	* @param part
	* the workbench part used to obtain context
	* @param align
	* the aligment ID.
	*/
	public AlignmentAction(IWorkbenchPart part, int align) {
	super(part);
	alignment = align;
	initUI();
	}

	/**
	* Returns the alignment rectangle to which all selected parts should be
	* aligned.
	*
	* @param request
	* the alignment Request
	* @return the alignment rectangle
	*/
	protected Rectangle calculateAlignmentRectangle(Request request) {
	List editparts = getOperationSet(request);
	if (editparts == null \|\| editparts.isEmpty()) {
	return null;
	}
	GraphicalEditPart part = null;
	if (alignment == PositionConstants.MIDDLE
	\|\| alignment == PositionConstants.CENTER) {
	part = (GraphicalEditPart) editparts.get(editparts.size() - 1);
	} else {
	part = getFitnessPart(editparts);
	}
	Rectangle rect = new PrecisionRectangle(part.getFigure().getBounds());
	part.getFigure().translateToAbsolute(rect);
	return rect;
	}

	/**
	* get the Fitness part in the four kinds of alignment directions
	*
	* @param editparts
	*/
	private GraphicalEditPart getFitnessPart(List editparts) {
	if (alignment == PositionConstants.MIDDLE
	\|\| alignment == PositionConstants.CENTER) {
	return null;
	}

	int positionComparor = Integer.MAX_VALUE;

	if (alignment == PositionConstants.LEFT
	\|\| alignment == PositionConstants.TOP) {
	positionComparor = Integer.MAX_VALUE;
	} else if (alignment == PositionConstants.RIGHT
	\|\| alignment == PositionConstants.BOTTOM) {
	positionComparor = Integer.MIN_VALUE;
	}

	GraphicalEditPart fitnessPart = null;

	for (Iterator iter = editparts.iterator(); iter.hasNext();) {
	GraphicalEditPart part = (GraphicalEditPart) iter.next();
	Rectangle rectPart = part.getFigure().getBounds();
	switch (alignment) {
	case PositionConstants.LEFT:
	if (rectPart.getLeft().x < positionComparor) {
	fitnessPart = part;
	positionComparor = rectPart.getLeft().x;
	}
	break;

	case PositionConstants.RIGHT:
	if (rectPart.getRight().x > positionComparor) {
	fitnessPart = part;
	positionComparor = rectPart.getRight().x;
	}
	break;
	case PositionConstants.TOP:
	if (rectPart.getTop().y < positionComparor) {
	fitnessPart = part;
	positionComparor = rectPart.getTop().y;
	}
	break;
	case PositionConstants.BOTTOM:
	if (rectPart.getBottom().y > positionComparor) {
	fitnessPart = part;
	positionComparor = rectPart.getBottom().y;
	}
	break;
	}
	}

	return fitnessPart;
	}

	/**
	* @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
	*/
	protected boolean calculateEnabled() {
	operationSet = null;
	Command cmd = createAlignmentCommand();
	if (cmd == null) {
	return false;
	}
	return cmd.canExecute();
	}

	private Command createAlignmentCommand() {
	AlignmentRequest request = new AlignmentRequest(
	RequestConstants.REQ_ALIGN);
	request.setAlignmentRectangle(calculateAlignmentRectangle(request));
	request.setAlignment(alignment);
	List editparts = getOperationSet(request);
	if (editparts.size() < 2) {
	return null;
	}

	CompoundCommand command = new CompoundCommand();
	command.setDebugLabel(getText());
	for (int i = 0; i < editparts.size(); i++) {
	EditPart editpart = (EditPart) editparts.get(i);
	command.add(editpart.getCommand(request));
	}
	return command;
	}

	/**
	* @see org.eclipse.gef.Disposable#dispose()
	*/
	public void dispose() {
	operationSet = Collections.EMPTY_LIST;
	super.dispose();
	}

	/**
	* Returns the list of editparts which will participate in alignment.
	*
	* @param request
	* the alignment request
	* @return the list of parts which will be aligned
	*/
	protected List getOperationSet(Request request) {
	if (operationSet != null) {
	return operationSet;
	}
	List editparts = new ArrayList(getSelectedObjects());
	if (editparts.isEmpty()
	\|\| !(editparts.get(0) instanceof GraphicalEditPart)) {
	return Collections.EMPTY_LIST;
	}
	Object primary = editparts.get(editparts.size() - 1);
	editparts = ToolUtilities.getSelectionWithoutDependants(editparts);
	ToolUtilities.filterEditPartsUnderstanding(editparts, request);
	if (editparts.size() < 2 \|\| !editparts.contains(primary)) {
	return Collections.EMPTY_LIST;
	}
	EditPart parent = ((EditPart) editparts.get(0)).getParent();
	for (int i = 1; i < editparts.size(); i++) {
	EditPart part = (EditPart) editparts.get(i);
	if (part.getParent() != parent) {
	return Collections.EMPTY_LIST;
	}
	}
	return editparts;
	}

	/**
	* Initializes the actions UI presentation.
	*/
	protected void initUI() {
	switch (alignment) {
	case PositionConstants.LEFT:
	setId(GEFActionConstants.ALIGN_LEFT);
	setText(EditorMessages.AlignmentAction_AlignLeftAction_Label);
	setToolTipText(EditorMessages.AlignmentAction_AlignLeftAction_Tooltip);
	setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_LEFT);
	setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_LEFT_DIS);
	break;

	case PositionConstants.RIGHT:
	setId(GEFActionConstants.ALIGN_RIGHT);
	setText(EditorMessages.AlignmentAction_AlignRightAction_Label);
	setToolTipText(EditorMessages.AlignmentAction_AlignRightAction_Tooltip);
	setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_RIGHT);
	setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_RIGHT_DIS);
	break;

	case PositionConstants.TOP:
	setId(GEFActionConstants.ALIGN_TOP);
	setText(EditorMessages.AlignmentAction_AlignTopAction_Label);
	setToolTipText(EditorMessages.AlignmentAction_AlignTopAction_Tooltip);
	setImageDescriptor(InternalImages.DESC_VERT_ALIGN_TOP);
	setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_TOP_DIS);
	break;

	case PositionConstants.BOTTOM:
	setId(GEFActionConstants.ALIGN_BOTTOM);
	setText(EditorMessages.AlignmentAction_AlignBottomAction_Label);
	setToolTipText(EditorMessages.AlignmentAction_AlignBottomAction_Tooltip);
	setImageDescriptor(InternalImages.DESC_VERT_ALIGN_BOTTOM);
	setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_BOTTOM_DIS);
	break;

	case PositionConstants.CENTER:
	setId(GEFActionConstants.ALIGN_CENTER);
	setText(EditorMessages.AlignmentAction_AlignCenterAction_Label);
	setToolTipText(EditorMessages.AlignmentAction_AlignCenterAction_Tooltip);
	setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_CENTER);
	setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_CENTER_DIS);
	break;

	case PositionConstants.MIDDLE:
	setId(GEFActionConstants.ALIGN_MIDDLE);
	setText(EditorMessages.AlignmentAction_AlignMiddleAction_Label);
	setToolTipText(EditorMessages.AlignmentAction_AlignMiddleAction_Tooltip);
	setImageDescriptor(InternalImages.DESC_VERT_ALIGN_MIDDLE);
	setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_MIDDLE_DIS);
	break;
	}
	}

	/**
	* @see org.eclipse.jface.action.IAction#run()
	*/
	public void run() {
	operationSet = null;
	execute(createAlignmentCommand());
	}

	}