| 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 jexer.bits.CellAttributes; |
| 32 | import jexer.event.TKeypressEvent; |
| 33 | import jexer.event.TMouseEvent; |
| 34 | import jexer.teditor.Document; |
| 35 | import jexer.teditor.Line; |
| 36 | import jexer.teditor.Word; |
| 37 | import static jexer.TKeypress.*; |
| 38 | |
| 39 | /** |
| 40 | * TEditorWidget displays an editable text document. It is unaware of |
| 41 | * scrolling behavior, but can respond to mouse and keyboard events. |
| 42 | */ |
| 43 | public final class TEditorWidget extends TWidget { |
| 44 | |
| 45 | /** |
| 46 | * The document being edited. |
| 47 | */ |
| 48 | private Document document; |
| 49 | |
| 50 | /** |
| 51 | * Public constructor. |
| 52 | * |
| 53 | * @param parent parent widget |
| 54 | * @param text text on the screen |
| 55 | * @param x column relative to parent |
| 56 | * @param y row relative to parent |
| 57 | * @param width width of text area |
| 58 | * @param height height of text area |
| 59 | */ |
| 60 | public TEditorWidget(final TWidget parent, final String text, final int x, |
| 61 | final int y, final int width, final int height) { |
| 62 | |
| 63 | // Set parent and window |
| 64 | super(parent, x, y, width, height); |
| 65 | |
| 66 | setCursorVisible(true); |
| 67 | document = new Document(text); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Draw the text box. |
| 72 | */ |
| 73 | @Override |
| 74 | public void draw() { |
| 75 | // Setup my color |
| 76 | CellAttributes color = getTheme().getColor("teditor"); |
| 77 | |
| 78 | int lineNumber = document.getLineNumber(); |
| 79 | for (int i = 0; i < getHeight(); i++) { |
| 80 | // Background line |
| 81 | getScreen().hLineXY(0, i, getWidth(), ' ', color); |
| 82 | |
| 83 | // Now draw document's line |
| 84 | if (lineNumber + i < document.getLineCount()) { |
| 85 | Line line = document.getLine(lineNumber + i); |
| 86 | int x = 0; |
| 87 | for (Word word: line.getWords()) { |
| 88 | getScreen().putStringXY(x, i, word.getText(), |
| 89 | word.getColor()); |
| 90 | x += word.getDisplayLength(); |
| 91 | if (x > getWidth()) { |
| 92 | break; |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Handle mouse press events. |
| 102 | * |
| 103 | * @param mouse mouse button press event |
| 104 | */ |
| 105 | @Override |
| 106 | public void onMouseDown(final TMouseEvent mouse) { |
| 107 | if (mouse.isMouseWheelUp()) { |
| 108 | document.up(); |
| 109 | return; |
| 110 | } |
| 111 | if (mouse.isMouseWheelDown()) { |
| 112 | document.down(); |
| 113 | return; |
| 114 | } |
| 115 | |
| 116 | // TODO: click sets row and column |
| 117 | |
| 118 | // Pass to children |
| 119 | super.onMouseDown(mouse); |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Handle keystrokes. |
| 124 | * |
| 125 | * @param keypress keystroke event |
| 126 | */ |
| 127 | @Override |
| 128 | public void onKeypress(final TKeypressEvent keypress) { |
| 129 | if (keypress.equals(kbLeft)) { |
| 130 | document.left(); |
| 131 | } else if (keypress.equals(kbRight)) { |
| 132 | document.right(); |
| 133 | } else if (keypress.equals(kbUp)) { |
| 134 | document.up(); |
| 135 | } else if (keypress.equals(kbDown)) { |
| 136 | document.down(); |
| 137 | } else if (keypress.equals(kbPgUp)) { |
| 138 | document.up(getHeight() - 1); |
| 139 | } else if (keypress.equals(kbPgDn)) { |
| 140 | document.down(getHeight() - 1); |
| 141 | } else if (keypress.equals(kbHome)) { |
| 142 | document.home(); |
| 143 | } else if (keypress.equals(kbEnd)) { |
| 144 | document.end(); |
| 145 | } else if (keypress.equals(kbCtrlHome)) { |
| 146 | document.setLineNumber(0); |
| 147 | document.home(); |
| 148 | } else if (keypress.equals(kbCtrlEnd)) { |
| 149 | document.setLineNumber(document.getLineCount() - 1); |
| 150 | document.end(); |
| 151 | } else if (keypress.equals(kbIns)) { |
| 152 | document.setOverwrite(!document.getOverwrite()); |
| 153 | } else if (keypress.equals(kbDel)) { |
| 154 | document.del(); |
| 155 | } else if (keypress.equals(kbBackspace)) { |
| 156 | document.backspace(); |
| 157 | } else if (!keypress.getKey().isFnKey() |
| 158 | && !keypress.getKey().isAlt() |
| 159 | && !keypress.getKey().isCtrl() |
| 160 | ) { |
| 161 | // Plain old keystroke, process it |
| 162 | document.addChar(keypress.getKey().getChar()); |
| 163 | } else { |
| 164 | // Pass other keys (tab etc.) on to TWidget |
| 165 | super.onKeypress(keypress); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | } |