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.Collections;
  34 import java.util.List;
  35
  36 /**
  37  * TDirectoryList shows the files within a directory.
  38  */
  39 public class TDirectoryList extends TList {
  40
  41     // ------------------------------------------------------------------------
  42     // Variables --------------------------------------------------------------
  43     // ------------------------------------------------------------------------
  44
  45     /**
  46      * Files in the directory.
  47      */
  48     private List<File> files;
  49
  50     /**
  51      * Root path containing files to display.
  52      */
  53     private File path;
  54
  55     // ------------------------------------------------------------------------
  56     // Constructors -----------------------------------------------------------
  57     // ------------------------------------------------------------------------
  58
  59     /**
  60      * Public constructor.
  61      *
  62      * @param parent parent widget
  63      * @param path directory path, must be a directory
  64      * @param x column relative to parent
  65      * @param y row relative to parent
  66      * @param width width of text area
  67      * @param height height of text area
  68      */
  69     public TDirectoryList(final TWidget parent, final String path, final int x,
  70         final int y, final int width, final int height) {
  71
  72         this(parent, path, x, y, width, height, null);
  73     }
  74
  75     /**
  76      * Public constructor.
  77      *
  78      * @param parent parent widget
  79      * @param path directory path, must be a directory
  80      * @param x column relative to parent
  81      * @param y row relative to parent
  82      * @param width width of text area
  83      * @param height height of text area
  84      * @param action action to perform when an item is selected
  85      */
  86     public TDirectoryList(final TWidget parent, final String path, final int x,
  87         final int y, final int width, final int height, final TAction action) {
  88
  89         super(parent, null, x, y, width, height, action);
  90         files = new ArrayList<File>();
  91         setPath(path);
  92     }
  93
  94     // ------------------------------------------------------------------------
  95     // TList ------------------------------------------------------------------
  96     // ------------------------------------------------------------------------
  97
  98     // ------------------------------------------------------------------------
  99     // TDirectoryList ---------------------------------------------------------
 100     // ------------------------------------------------------------------------
 101
 102     /**
 103      * Set the new path to display.
 104      *
 105      * @param path new path to list files for
 106      */
 107     public void setPath(final String path) {
 108         this.path = new File(path);
 109
 110         List<String> newStrings = new ArrayList<String>();
 111         files.clear();
 112
 113         // Build a list of files in this directory
 114         File [] newFiles = this.path.listFiles();
 115         if (newFiles != null) {
 116             for (int i = 0; i < newFiles.length; i++) {
 117                 if (newFiles[i].getName().startsWith(".")) {
 118                     continue;
 119                 }
 120                 if (newFiles[i].isDirectory()) {
 121                     continue;
 122                 }
 123                 files.add(newFiles[i]);
 124                 newStrings.add(renderFile(files.size() - 1));
 125             }
 126         }
 127         Collections.sort(newStrings);
 128         setList(newStrings);
 129
 130         // Select the first entry
 131         if (getMaxSelectedIndex() >= 0) {
 132             setSelectedIndex(0);
 133         }
 134     }
 135
 136     /**
 137      * Get the path that is being displayed.
 138      *
 139      * @return the path
 140      */
 141     public File getPath() {
 142         path = files.get(getSelectedIndex());
 143         return path;
 144     }
 145
 146     /**
 147      * Format one of the entries for drawing on the screen.
 148      *
 149      * @param index index into files
 150      * @return the line to draw
 151      */
 152     private String renderFile(final int index) {
 153         File file = files.get(index);
 154         String name = file.getName();
 155         if (name.length() > 20) {
 156             name = name.substring(0, 17) + "...";
 157         }
 158         return String.format("%-20s %5dk", name, (file.length() / 1024));
 159     }
 160
 161 }