EditPartHelper.java

/* Copyright 2012-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.snaker.designer.parts;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.GraphicalEditPart;

import org.snaker.designer.config.ConfigManager;
import org.snaker.designer.model.Attr;
import org.snaker.designer.model.BaseElement;
import org.snaker.designer.model.Field;
import org.snaker.designer.model.ModelHelper;

/**
 * EditPart帮助类，主要针对Form、Field的编辑
 * @author yuqs
 * @version 1.0
 */
public class EditPartHelper {
	public static Point getCurFigureLocation(GraphicalEditPart edit,
			Figure figure) {
		GraphicalEditPart preEdit = getPreviousPart(edit);
		if (preEdit == null) {
			return new Point(30, 30);
		}

		Point point = createCurLocation(preEdit);
		String lineBR = ModelHelper.getElementLineBR((BaseElement) preEdit
				.getModel());
		if (lineBR.equalsIgnoreCase(ConfigManager.VALUE_LIST_FALSE)) {
			Point prePoint = ((Figure) preEdit.getFigure()).getLocation();
			if (point.y == prePoint.y) {
				List<Attr> attrs = ((BaseElement) edit.getModel()).getAttrs();
				if (attrs.isEmpty()) {
					Attr attr = new Attr();
					attr.setName(ConfigManager.PROPERTIES_LINEBR);
					attr.setValue(ConfigManager.VALUE_LIST_TRUE);
					attrs.add(attr);
				} else {
					for (Attr attr : attrs) {
						if (attr.getName().equalsIgnoreCase(
								ConfigManager.PROPERTIES_LINEBR)) {
							attr.setValue(ConfigManager.VALUE_LIST_TRUE);
						}
					}
				}
			}
		}
		return point;
	}

	public static Point getCurFigureLocation(GraphicalEditPart edit) {
		GraphicalEditPart preEdit = getPreviousPart(edit);
		if (preEdit == null) {
			return new Point(30, 30);
		}

		Point point = createCurLocation(preEdit);
		return point;
	}

	private static GraphicalEditPart getPreviousPart(GraphicalEditPart curPart) {
		GraphicalEditPart preEdit = null;
		List<?> listParts = curPart.getParent().getChildren();
		for (int i = 0; i < listParts.size(); i++) {
			if (listParts.get(i) != curPart)
				continue;
			if (i == 0)
				continue;
			preEdit = (GraphicalEditPart) listParts.get(i - 1);
		}

		return preEdit;
	}

	private static Point createCurLocation(GraphicalEditPart preEdit) {
		String lineBR = ConfigManager.VALUE_LIST_FALSE;
		Point point = null;
		Figure figure = (Figure) preEdit.getFigure();

		if ((preEdit.getModel() instanceof BaseElement)) {
			lineBR = ModelHelper.getElementLineBR((BaseElement) preEdit
					.getModel());
		}
		if (lineBR.equals(ConfigManager.VALUE_LIST_TRUE)) {
			point = new Point(30, figure.getLocation().y
					+ figure.getSize().height - 1);
		} else {
			point = new Point(figure.getLocation().x + figure.getSize().width
					- 1, figure.getLocation().y);
		}
		return point;
	}

	@SuppressWarnings("unchecked")
	public static List<EditPart> getRestEditParts(EditPart editpart) {
		List<EditPart> listOut = new ArrayList<EditPart>();
		List<EditPart> listParts = editpart.getParent().getChildren();
		boolean bFlag = false;

		if (listParts == null) {
			return new ArrayList<EditPart>();
		}
		for (int i = 0; i < listParts.size(); i++) {
			if (bFlag) {
				listOut.add(listParts.get(i));
			} else {
				if (editpart != listParts.get(i)) {
					continue;
				}
				bFlag = true;
				listOut.add(listParts.get(i));
			}
		}
		return listOut;
	}

	public static void refreshEditPartsLocation(List<EditPart> editparts) {
		for (int i = 0; i < editparts.size(); i++) {
			if (i == 0) {
				continue;
			}
			FieldEditPart curPart = (FieldEditPart) editparts.get(i);
			FieldEditPart nextPart = (FieldEditPart) editparts.get(i - 1);
			Point p = createCurLocation(nextPart);

			curPart.getFigure().setLocation(p);
		}
	}

	public static void refreshAllChildren(EditPart part) {
		if ((part.getModel() instanceof Field)) {
			return;
		}
		List<?> list = part.getChildren();
		for (int i = 0; i < list.size(); i++) {
			FieldEditPart tmpPart = (FieldEditPart) list.get(i);
			tmpPart.refreshLocation();
		}
	}

	public static List<?> getEditPartsInLayouts(EditPart editpart) {
		if (!(editpart instanceof FieldEditPart)) {
			return null;
		}
		FieldEditPart ep = (FieldEditPart) editpart;

		if (ep.isLayout()) {
			return ep.getChildren();
		}
		EditPart pep = ep.getParent();
		return pep.getChildren();
	}

	public static void refreshLocation(List<?> editparts) {
		for (int i = 0; i < editparts.size(); i++) {
			FieldEditPart ep = (FieldEditPart) editparts.get(i);
			if (i == 0) {
				Point p = new Point(30, 30);
				ep.getFigure().setLocation(p);
			} else {
				FieldEditPart pep = (FieldEditPart) editparts.get(i - 1);
				Point p = createCurLocation(pep);
				ep.getFigure().setLocation(p);
			}
		}
	}

	public static void refreshAllEditPartLocation(EditPart part) {
		List<?> list = getEditPartsInLayouts(part);
		refreshLocation(list);
	}

	public static Object getParentModel(TaskFieldEditPart editpart) {
		if (editpart == null) {
			return null;
		}
		while (!editpart.isLayout()) {
			if (!(editpart.getParent() instanceof TaskFieldEditPart)) {
				break;
			}
			editpart = (TaskFieldEditPart) editpart.getParent();
			continue;
		}
		return editpart.getModel();
	}
}