| 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.teditor; |
| 30 | |
| 31 | import java.util.ArrayList; |
| 32 | import java.util.List; |
| 33 | |
| 34 | /** |
| 35 | * A Line represents a single line of text on the screen, as a collection of |
| 36 | * words. |
| 37 | */ |
| 38 | public class Line { |
| 39 | |
| 40 | /** |
| 41 | * The list of words. |
| 42 | */ |
| 43 | private ArrayList<Word> words = new ArrayList<Word>(); |
| 44 | |
| 45 | /** |
| 46 | * The current cursor position on this line. |
| 47 | */ |
| 48 | private int cursorX; |
| 49 | |
| 50 | /** |
| 51 | * The current word that the cursor position is in. |
| 52 | */ |
| 53 | private Word currentWord; |
| 54 | |
| 55 | /** |
| 56 | * We use getDisplayLength() a lot, so cache the value. |
| 57 | */ |
| 58 | private int displayLength = -1; |
| 59 | |
| 60 | /** |
| 61 | * Get a (shallow) copy of the list of words. |
| 62 | * |
| 63 | * @return the list of words |
| 64 | */ |
| 65 | public List<Word> getWords() { |
| 66 | return new ArrayList<Word>(words); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Get the on-screen display length. |
| 71 | * |
| 72 | * @return the number of cells needed to display this line |
| 73 | */ |
| 74 | public int getDisplayLength() { |
| 75 | if (displayLength != -1) { |
| 76 | return displayLength; |
| 77 | } |
| 78 | int n = 0; |
| 79 | for (Word word: words) { |
| 80 | n += word.getDisplayLength(); |
| 81 | } |
| 82 | displayLength = n; |
| 83 | return displayLength; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Construct a new Line from an existing text string. |
| 88 | * |
| 89 | * @param str the text string |
| 90 | */ |
| 91 | public Line(final String str) { |
| 92 | currentWord = new Word(); |
| 93 | words.add(currentWord); |
| 94 | for (int i = 0; i < str.length(); i++) { |
| 95 | char ch = str.charAt(i); |
| 96 | Word newWord = currentWord.addChar(ch); |
| 97 | if (newWord != currentWord) { |
| 98 | words.add(newWord); |
| 99 | currentWord = newWord; |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Decrement the cursor by one. If at the first column, do nothing. |
| 106 | */ |
| 107 | public void left() { |
| 108 | if (cursorX == 0) { |
| 109 | return; |
| 110 | } |
| 111 | // TODO |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Increment the cursor by one. If at the last column, do nothing. |
| 116 | */ |
| 117 | public void right() { |
| 118 | if (cursorX == getDisplayLength() - 1) { |
| 119 | return; |
| 120 | } |
| 121 | // TODO |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Go to the first column of this line. |
| 126 | */ |
| 127 | public void home() { |
| 128 | // TODO |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Go to the last column of this line. |
| 133 | */ |
| 134 | public void end() { |
| 135 | // TODO |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Delete the character under the cursor. |
| 140 | */ |
| 141 | public void del() { |
| 142 | // TODO |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Delete the character immediately preceeding the cursor. |
| 147 | */ |
| 148 | public void backspace() { |
| 149 | // TODO |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Replace or insert a character at the cursor, depending on overwrite |
| 154 | * flag. |
| 155 | * |
| 156 | * @param ch the character to replace or insert |
| 157 | */ |
| 158 | public void addChar(final char ch) { |
| 159 | // TODO |
| 160 | } |
| 161 | |
| 162 | } |