ModifyLatexProperties.java

/*
 * This file is part of LaTeXDraw.
 * Copyright (c) 2005-2017 Arnaud BLOUIN
 * LaTeXDraw is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later version.
 * LaTeXDraw is distributed without any warranty; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 */
package net.sf.latexdraw.actions;

import net.sf.latexdraw.util.LangTool;
import net.sf.latexdraw.view.latex.LaTeXGenerator;
import net.sf.latexdraw.view.latex.VerticalPosition;
import org.malai.action.ActionImpl;
import org.malai.undo.Undoable;

/**
 * This action modifies the latex properties of the current drawing.
 * @author Arnaud Blouin
 */
public class ModifyLatexProperties extends ActionImpl implements Undoable, Modifying {
	/** The new value to set. */
	protected Object value;

	/** The saved value used for undo/redo. */
	protected Object oldValue;

	/** The property to modify. */
	protected LatexProperties property;

	/** The LaTeX generator to modify. */
	protected LaTeXGenerator generator;


	public ModifyLatexProperties() {
		super();
	}

	@Override
	public RegistrationPolicy getRegistrationPolicy() {
		return hadEffect() ? RegistrationPolicy.LIMITED : RegistrationPolicy.LIMITED;
	}


	@Override
	protected void doActionBody() {
		switch(property) {
			case SCALE	 			: oldValue = generator.getScale(); break;
			case CAPTION 			: oldValue = generator.getCaption(); break;
			case COMMENT 			: oldValue = generator.getComment(); break;
			case LABEL 				: oldValue = generator.getLabel(); break;
			case PACKAGES 			: oldValue = LaTeXGenerator.getPackages(); break;
			case POSITION_HORIZONTAL: oldValue = generator.isPositionHoriCentre(); break;
			case POSITION_VERTICAL 	: oldValue = generator.getPositionVertToken(); break;
		}

		applyValue(value);
	}


	private void applyValue(final Object object) {
		switch(property) {
			case SCALE	 			: generator.setScale((Double)object); break;
			case CAPTION 			: generator.setCaption((String)object); break;
			case COMMENT 			: generator.setComment((String)object); break;
			case LABEL 				: generator.setLabel((String)object); break;
			case PACKAGES 			: LaTeXGenerator.setPackages((String)object); break;
			case POSITION_HORIZONTAL: generator.setPositionHoriCentre((Boolean)object); break;
			case POSITION_VERTICAL  : generator.setPositionVertToken((VerticalPosition)object); break;
		}
	}


	@Override
	public boolean canDo() {
		// PACKAGES does not require the generator since it is a static attribute.
		return property!=null && property.isValueSupported(value) && (generator!=null || property==LatexProperties.PACKAGES);
	}


	@Override
	public void undo() {
		applyValue(oldValue);
	}


	@Override
	public void redo() {
		applyValue(value);
	}


	@Override
	public String getUndoName() {
		return LangTool.INSTANCE.getBundle().getString("Actions.0"); //$NON-NLS-1$
	}


	/**
	 * @param val The new val to set.
	 * @since 3.0
	 */
	public void setValue(final Object val) {
		value = val;
	}


	/**
	 * @param prop The prop to modify.
	 * @since 3.0
	 */
	public void setProperty(final LatexProperties prop) {
		property = prop;
	}


	/**
	 * @param gen The LaTeX generator to modify.
	 * @since 3.0
	 */
	public void setGenerator(final LaTeXGenerator gen) {
		generator = gen;
	}
}