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.Style;
025 import org.crsh.util.BlankSequence;
026 import org.crsh.util.Pair;
027
028 class LabelReader implements LineReader {
029
030 /** . */
031 private final LabelElement element;
032
033 /** . */
034 private final Pair<Integer, Integer>[] lines;
035
036 /** . */
037 private final int width;
038
039 /** . */
040 private final int height;
041
042 LabelReader(LabelElement element, Pair<Integer, Integer>[] lines, int width, int height) {
043 this.element = element;
044 this.lines = lines;
045 this.height = height;
046 this.width = width;
047 }
048
049 /** . */
050 private int index = 0;
051
052 public boolean hasLine() {
053 return index < height;
054 }
055
056 public void renderLine(RenderAppendable to) {
057 if (index >= height) {
058 throw new IllegalStateException();
059 } else {
060 Style.Composite style = element.getStyle();
061 if (style != null) {
062 to.enterStyle(style);
063 }
064 if (index < lines.length) {
065 Pair<Integer, Integer> a = lines[index];
066 to.append(element.value, a.getFirst(), a.getSecond());
067 int missing = width - (a.getSecond() - a.getFirst());
068 if (missing > 0) {
069 to.append(BlankSequence.create(missing));
070 }
071 } else {
072 for (int i = 0;i < width;i++) {
073 to.append(' ');
074 }
075 }
076 index++;
077 if (style != null) {
078 to.leaveStyle();
079 }
080 }
081 }
082 }