001    /*
002     * Copyright (C) 2012 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    
020    package org.crsh.text.ui;
021    
022    import org.crsh.text.LineReader;
023    import org.crsh.text.RenderAppendable;
024    import org.crsh.text.Renderer;
025    import org.crsh.text.Style;
026    
027    public abstract class Element {
028    
029      /** . */
030      private Style.Composite style;
031    
032      protected Element() {
033        this.style = null;
034      }
035    
036      public abstract Renderer renderer();
037    
038      public void render(RenderAppendable to) {
039        Renderer renderer = renderer();
040    
041        // For now height - 1 because of the char that goes to the line in some impl
042        LineReader reader = renderer.reader(to.getWidth(), to.getHeight() - 1);
043        if (reader != null) {
044          while (reader.hasLine()) {
045            reader.renderLine(to);
046            to.append('\n');
047          }
048        }
049      }
050    
051      public final Style.Composite getStyle() {
052        return style;
053      }
054    
055      public final void setStyle(Style.Composite style) {
056        this.style = style;
057      }
058    
059      public Element style(Style.Composite style) {
060        setStyle(style);
061        return this;
062      }
063    
064      public static RowElement row() {
065        return new RowElement();
066      }
067    
068      public static RowElement header() {
069        return new RowElement(true);
070      }
071    
072      public static LabelElement label(String value) {
073        return new LabelElement(value);
074      }
075    }