1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.g2d.element.handler.impl;
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14 import org.simantics.g2d.element.ElementUtils;
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15 import org.simantics.g2d.element.IElement;
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16 import org.simantics.g2d.element.handler.TextEditor;
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17 import org.simantics.g2d.utils.TextSegment;
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18 import org.simantics.utils.datastructures.hints.IHintContext.Key;
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19 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
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21 public class TextEditorImpl implements TextEditor {
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23 private static final long serialVersionUID = 7183657432363119779L;
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25 public static final TextEditor INSTANCE = new TextEditorImpl();
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27 public static final Key ACTIVE = new KeyOf(Boolean.class, "TEXT_EDITOR_ACTIVE");
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28 public static final Key TEXT = new KeyOf(String.class, "TEXT_EDIT_TEXT");
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29 public static final Key MODIFIER = new KeyOf(Modifier.class, "TEXT_MODIFIER");
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30 public static final Key TEXT_SELECTION = new KeyOf(TextSegment.class, "TEXT_SELECTION");
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31 public static final Key CARET_POS = new KeyOf(Integer.class, "CARET_POS");
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34 public boolean isActive(IElement e) {
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35 return ElementUtils.getHintOrDefault(e, ACTIVE, Boolean.FALSE);
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39 public void setActive(IElement e, boolean value) {
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40 ElementUtils.setOrRemoveHint(e, ACTIVE, value ? Boolean.TRUE : null);
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42 e.removeHint(CARET_POS);
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47 public String getText(IElement e) {
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48 return e.getHint(TEXT);
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52 public void setText(IElement e, String text) {
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53 ElementUtils.setOrRemoveHint(e, TEXT, text);
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57 public Modifier getModifier(IElement e) {
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58 return e.getHint(MODIFIER);
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62 public void setModifier(IElement e, org.simantics.g2d.element.handler.TextEditor.Modifier modifier) {
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63 ElementUtils.setOrRemoveHint(e, MODIFIER, modifier);
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67 public Integer getCaretPosition(IElement e) {
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68 Integer pos = e.getHint(CARET_POS);
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73 public TextSegment getSelection(IElement e) {
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74 return e.getHint(TEXT_SELECTION);
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77 private static boolean isValidCaretPosition(String s, int pos) {
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79 return pos >= 0 && pos <= l;
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82 private static void assertValidCaretPosition(String s, int pos) {
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83 boolean valid = isValidCaretPosition(s, pos);
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85 throw new IllegalArgumentException("caret position " + pos + " is out of bounds in text '" + s + "'");
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89 public void setCaretPosition(IElement e, Integer position) {
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90 if (position == null) {
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91 e.removeHint(CARET_POS);
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93 String text = getText(e);
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94 Integer old = e.getHint(CARET_POS);
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95 if (position.equals(old))
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97 assertValidCaretPosition(text, position);
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98 e.setHint(CARET_POS, position);
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103 public void setSelection(IElement e, TextSegment segment) {
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104 if (segment == null) {
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105 e.removeHint(TEXT_SELECTION);
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107 String text = getText(e);
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108 TextSegment old = e.getHint(TEXT_SELECTION);
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109 if (segment.equals(old))
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111 if (!segment.existsIn(text))
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112 throw new IllegalArgumentException("segment " + segment + " does not exist in text '" + text + "'");
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113 e.setHint(TEXT_SELECTION, segment);
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