src/jexer/TDirectoryList.java

   1 /*
   2  * Jexer - Java Text User Interface
   3  *
   4  * The MIT License (MIT)
   5  *
   6  * Copyright (C) 2017 Kevin Lamonte
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * @author Kevin Lamonte [kevin.lamonte@gmail.com]
  27  * @version 1
  28  */
  29 package jexer;
  30
  31 import java.io.File;
  32 import java.util.ArrayList;
  33 import java.util.List;
  34
  35 /**
  36  * TDirectoryList shows the files within a directory.
  37  */
  38 public class TDirectoryList extends TList {
  39
  40     /**
  41      * Files in the directory.
  42      */
  43     private List<File> files;
  44
  45     /**
  46      * Root path containing files to display.
  47      */
  48     private File path;
  49
  50     /**
  51      * Set the new path to display.
  52      *
  53      * @param path new path to list files for
  54      */
  55     public void setPath(final String path) {
  56         this.path = new File(path);
  57
  58         List<String> newStrings = new ArrayList<String>();
  59         files.clear();
  60
  61         // Build a list of files in this directory
  62         File [] newFiles = this.path.listFiles();
  63         if (newFiles != null) {
  64             for (int i = 0; i < newFiles.length; i++) {
  65                 if (newFiles[i].getName().startsWith(".")) {
  66                     continue;
  67                 }
  68                 if (newFiles[i].isDirectory()) {
  69                     continue;
  70                 }
  71                 files.add(newFiles[i]);
  72                 newStrings.add(renderFile(files.size() - 1));
  73             }
  74         }
  75         setList(newStrings);
  76
  77         // Select the first entry
  78         if (getMaxSelectedIndex() >= 0) {
  79             setSelectedIndex(0);
  80         }
  81     }
  82
  83     /**
  84      * Get the path that is being displayed.
  85      *
  86      * @return the path
  87      */
  88     public File getPath() {
  89         path = files.get(getSelectedIndex());
  90         return path;
  91     }
  92
  93     /**
  94      * Format one of the entries for drawing on the screen.
  95      *
  96      * @param index index into files
  97      * @return the line to draw
  98      */
  99     private String renderFile(final int index) {
 100         File file = files.get(index);
 101         String name = file.getName();
 102         if (name.length() > 20) {
 103             name = name.substring(0, 17) + "...";
 104         }
 105         return String.format("%-20s %5dk", name, (file.length() / 1024));
 106     }
 107
 108     /**
 109      * Public constructor.
 110      *
 111      * @param parent parent widget
 112      * @param path directory path, must be a directory
 113      * @param x column relative to parent
 114      * @param y row relative to parent
 115      * @param width width of text area
 116      * @param height height of text area
 117      */
 118     public TDirectoryList(final TWidget parent, final String path, final int x,
 119         final int y, final int width, final int height) {
 120
 121         this(parent, path, x, y, width, height, null);
 122     }
 123
 124     /**
 125      * Public constructor.
 126      *
 127      * @param parent parent widget
 128      * @param path directory path, must be a directory
 129      * @param x column relative to parent
 130      * @param y row relative to parent
 131      * @param width width of text area
 132      * @param height height of text area
 133      * @param action action to perform when an item is selected
 134      */
 135     public TDirectoryList(final TWidget parent, final String path, final int x,
 136         final int y, final int width, final int height, final TAction action) {
 137
 138         super(parent, null, x, y, width, height, action);
 139         files = new ArrayList<File>();
 140         setPath(path);
 141     }
 142
 143 }