annotate dwt/widgets/IME.d @ 45:d8635bb48c7c

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author Jacob Carlborg <doob@me.com>
date Mon, 01 Dec 2008 17:07:00 +0100
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1 /*******************************************************************************
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2 * Copyright (c) 2007, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <doob@me.com>
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13 *******************************************************************************/
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14 module dwt.widgets.IME;
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15
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16 import dwt.DWT;
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17 import dwt.DWTException;
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18 import dwt.graphics.Color;
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19 import dwt.graphics.Font;
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20 import dwt.graphics.TextStyle;
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21 import dwt.internal.cocoa.NSArray;
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22 import dwt.internal.cocoa.NSAttributedString;
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23 import dwt.internal.cocoa.NSColor;
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24 import dwt.internal.cocoa.NSDictionary;
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25 import dwt.internal.cocoa.NSFont;
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26 import dwt.internal.cocoa.NSMutableArray;
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27 import dwt.internal.cocoa.NSNumber;
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28 import dwt.internal.cocoa.NSPoint;
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29 import dwt.internal.cocoa.NSRange;
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30 import dwt.internal.cocoa.NSRect;
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31 import dwt.internal.cocoa.NSString;
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32 import dwt.internal.cocoa.NSView;
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33 import dwt.internal.cocoa.OS;
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35 import dwt.dwthelper.utils;
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36 import dwt.widgets.Canvas;
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37 import dwt.widgets.Widget;
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38
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39 /**
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40 * Instances of this class represent input method editors.
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41 * These are typically in-line pre-edit text areas that allow
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42 * the user to compose characters from Far Eastern languages
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43 * such as Japanese, Chinese or Korean.
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44 *
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45 * <dl>
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46 * <dt><b>Styles:</b></dt>
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47 * <dd>(none)</dd>
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48 * <dt><b>Events:</b></dt>
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49 * <dd>ImeComposition</dd>
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50 * </dl>
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51 * <p>
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52 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
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53 * </p>
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54 *
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55 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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56 *
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57 * @since 3.4
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58 */
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59 public class IME : Widget {
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60 Canvas parent;
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61 int caretOffset;
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62 int startOffset;
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63 int commitCount;
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64 String text;
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65 int [] ranges;
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66 TextStyle [] styles;
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67
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68 static final int UNDERLINE_THICK = 1 << 16;
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69
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70 /**
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71 * Prevents uninitialized instances from being created outside the package.
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72 */
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73 this () {
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74 }
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75
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76 /**
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77 * Constructs a new instance of this class given its parent
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78 * and a style value describing its behavior and appearance.
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79 * <p>
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80 * The style value is either one of the style constants defined in
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81 * class <code>DWT</code> which is applicable to instances of this
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82 * class, or must be built by <em>bitwise OR</em>'ing together
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83 * (that is, using the <code>int</code> "|" operator) two or more
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84 * of those <code>DWT</code> style constants. The class description
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85 * lists the style constants that are applicable to the class.
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86 * Style bits are also inherited from superclasses.
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87 * </p>
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88 *
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89 * @param parent a canvas control which will be the parent of the new instance (cannot be null)
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90 * @param style the style of control to construct
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91 *
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92 * @exception IllegalArgumentException <ul>
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93 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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94 * </ul>
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95 * @exception DWTException <ul>
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96 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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97 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
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98 * </ul>
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99 *
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100 * @see Widget#checkSubclass
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101 * @see Widget#getStyle
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102 */
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103 public this (Canvas parent, int style) {
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104 super (parent, style);
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105 this.parent = parent;
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106 createWidget ();
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107 }
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108
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109 int /*long*/ attributedSubstringFromRange (int /*long*/ id, int /*long*/ sel, int /*long*/ rangePtr) {
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110 Event event = new Event ();
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111 event.detail = DWT.COMPOSITION_SELECTION;
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112 sendEvent (DWT.ImeComposition, event);
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113 NSRange range = new NSRange ();
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114 OS.memmove (range, rangePtr, NSRange.sizeof);
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115 int start = (int)/*64*/range.location;
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116 int end = (int)/*64*/(range.location + range.length);
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117 if (event.start <= start && start <= event.end && event.start <= end && end <= event.end) {
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118 NSString str = NSString.stringWith (event.text.substring(start - event.start, end - event.start));
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119 NSAttributedString attriStr = ((NSAttributedString)new NSAttributedString().alloc()).initWithString(str, null);
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120 attriStr.autorelease ();
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121 return attriStr.id;
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122 }
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123 return 0;
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124 }
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125
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126 int /*long*/ characterIndexForPoint (int /*long*/ id, int /*long*/ sel, int /*long*/ point) {
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127 if (!isInlineEnabled ()) return OS.NSNotFound;
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128 NSPoint pt = new NSPoint ();
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129 OS.memmove (pt, point, NSPoint.sizeof);
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130 NSView view = parent.view;
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131 pt = view.window ().convertScreenToBase (pt);
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132 pt = view.convertPoint_fromView_ (pt, null);
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133 Event event = new Event ();
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134 event.detail = DWT.COMPOSITION_OFFSET;
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135 event.x = (int) pt.x;
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136 event.y = (int) pt.y;
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137 sendEvent (DWT.ImeComposition, event);
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138 int offset = event.index + event.count;
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139 return offset !is -1 ? offset : OS.NSNotFound;
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140 }
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141
0
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142 void createWidget () {
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143 text = "";
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144 startOffset = -1;
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145 if (parent.getIME () is null) {
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146 parent.setIME (this);
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147 }
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148 }
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149
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150 NSRect firstRectForCharacterRange(int /*long*/ id, int /*long*/ sel, int /*long*/ range) {
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151 NSRect rect = new NSRect ();
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152 Caret caret = parent.caret;
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153 if (caret !is null) {
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154 NSView view = parent.view;
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155 NSPoint pt = new NSPoint ();
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156 pt.x = caret.x;
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157 pt.y = caret.y + caret.height;
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158 pt = view.convertPoint_toView_ (pt, null);
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159 pt = view.window ().convertBaseToScreen (pt);
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160 rect.x = pt.x;
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161 rect.y = pt.y;
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162 rect.width = caret.width;
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163 rect.height = caret.height;
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164 }
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165 return rect;
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166 }
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167
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168 /**
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169 * Returns the offset of the caret from the start of the document.
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170 * The caret is within the current composition.
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171 *
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172 * @return the caret offset
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173 *
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174 * @exception DWTException <ul>
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175 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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176 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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177 * </ul>
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178 */
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179 public int getCaretOffset () {
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180 checkWidget ();
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181 return startOffset + caretOffset;
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182 }
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183
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184 /**
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185 * Returns the commit count of the composition. This is the
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186 * number of characters that have been composed. When the
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187 * commit count is equal to the length of the composition
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188 * text, then the in-line edit operation is complete.
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189 *
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190 * @return the commit count
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191 *
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192 * @exception DWTException <ul>
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193 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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194 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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195 * </ul>
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196 *
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197 * @see IME#getText
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198 */
0
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199 public int getCommitCount () {
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200 checkWidget ();
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201 return commitCount;
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202 }
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203
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204 /**
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205 * Returns the offset of the composition from the start of the document.
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206 * This is the start offset of the composition within the document and
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207 * in not changed by the input method editor itself during the in-line edit
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208 * session.
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209 *
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210 * @return the offset of the composition
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211 *
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212 * @exception DWTException <ul>
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213 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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214 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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215 * </ul>
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216 */
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217 public int getCompositionOffset () {
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218 checkWidget ();
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219 return startOffset;
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220 }
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221
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222 /**
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223 * Returns the ranges for the style that should be applied during the
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224 * in-line edit session.
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225 * <p>
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226 * The ranges array contains start and end pairs. Each pair refers to
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227 * the corresponding style in the styles array. For example, the pair
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228 * that starts at ranges[n] and ends at ranges[n+1] uses the style
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229 * at styles[n/2] returned by <code>getStyles()</code>.
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230 * </p>
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231 * @return the ranges for the styles
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232 *
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233 * @exception DWTException <ul>
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234 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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235 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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236 * </ul>
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237 *
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238 * @see IME#getStyles
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239 */
0
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240 public int [] getRanges () {
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241 checkWidget ();
45
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242 if (ranges is null) return new int [0];
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243 int [] result = new int [ranges.length];
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244 for (int i = 0; i < result.length; i++) {
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245 result [i] = ranges [i] + startOffset;
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246 }
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247 return result;
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248 }
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249
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250 /**
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251 * Returns the styles for the ranges.
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252 * <p>
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253 * The ranges array contains start and end pairs. Each pair refers to
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254 * the corresponding style in the styles array. For example, the pair
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255 * that starts at ranges[n] and ends at ranges[n+1] uses the style
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256 * at styles[n/2].
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257 * </p>
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258 *
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259 * @return the ranges for the styles
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260 *
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261 * @exception DWTException <ul>
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262 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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263 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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264 * </ul>
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265 *
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266 * @see IME#getRanges
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267 */
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268 public TextStyle [] getStyles () {
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269 checkWidget ();
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270 if (styles is null) return new TextStyle [0];
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271 TextStyle [] result = new TextStyle [styles.length];
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272 System.arraycopy (styles, 0, result, 0, styles.length);
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273 return result;
0
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274 }
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275
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276 TextStyle getStyle (NSDictionary attribs) {
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277 NSArray keys = attribs.allKeys ();
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278 int /*long*/ count = keys.count ();
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279 TextStyle style = new TextStyle ();
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280 for (int j = 0; j < count; j++) {
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281 NSString key = new NSString (keys.objectAtIndex (j));
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282 if (key.isEqualTo (OS.NSBackgroundColorAttributeName)) {
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283 NSColor color = new NSColor (attribs.objectForKey (key)).colorUsingColorSpaceName (OS.NSCalibratedRGBColorSpace);
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284 float [] rgbColor = new float []{(float)/*64*/color.redComponent(), (float)/*64*/color.greenComponent(), (float)/*64*/color.blueComponent(), (float)/*64*/color.alphaComponent()};
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285 style.background = Color.cocoa_new (display, rgbColor);
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286 } else if (key.isEqualTo (OS.NSForegroundColorAttributeName)) {
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287 NSColor color = new NSColor (attribs.objectForKey (key)).colorUsingColorSpaceName (OS.NSCalibratedRGBColorSpace);
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288 float [] rgbColor = new float []{(float)/*64*/color.redComponent(), (float)/*64*/color.greenComponent(), (float)/*64*/color.blueComponent(), (float)/*64*/color.alphaComponent()};
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289 style.foreground = Color.cocoa_new (display, rgbColor);
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290 } else if (key.isEqualTo (OS.NSUnderlineColorAttributeName)) {
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291 NSColor color = new NSColor (attribs.objectForKey (key)).colorUsingColorSpaceName (OS.NSCalibratedRGBColorSpace);
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292 float [] rgbColor = new float []{(float)/*64*/color.redComponent(), (float)/*64*/color.greenComponent(), (float)/*64*/color.blueComponent(), (float)/*64*/color.alphaComponent()};
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293 style.underlineColor = Color.cocoa_new (display, rgbColor);
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294 } else if (key.isEqualTo (OS.NSUnderlineStyleAttributeName)) {
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295 NSNumber value = new NSNumber (attribs.objectForKey (key));
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296 switch (value.intValue ()) {
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297 case OS.NSUnderlineStyleSingle: style.underlineStyle = DWT.UNDERLINE_SINGLE; break;
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298 case OS.NSUnderlineStyleDouble: style.underlineStyle = DWT.UNDERLINE_DOUBLE; break;
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299 case OS.NSUnderlineStyleThick: style.underlineStyle = UNDERLINE_THICK; break;
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300 }
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301 style.underline = value.intValue () !is OS.NSUnderlineStyleNone;
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302 } else if (key.isEqualTo (OS.NSStrikethroughColorAttributeName)) {
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303 NSColor color = new NSColor (attribs.objectForKey (key)).colorUsingColorSpaceName (OS.NSCalibratedRGBColorSpace);
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304 float [] rgbColor = new float []{(float)/*64*/color.redComponent(), (float)/*64*/color.greenComponent(), (float)/*64*/color.blueComponent(), (float)/*64*/color.alphaComponent()};
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305 style.strikeoutColor = Color.cocoa_new (display, rgbColor);
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306 } else if (key.isEqualTo (OS.NSStrikethroughStyleAttributeName)) {
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307 NSNumber value = new NSNumber (attribs.objectForKey (key));
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308 style.strikeout = value.intValue () !is OS.NSUnderlineStyleNone;
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309 } else if (key.isEqualTo (OS.NSFontAttributeName)) {
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310 NSFont font = new NSFont (attribs.objectForKey (key));
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311 style.font = Font.cocoa_new (display, font);
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312 }
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313 }
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314 return style;
0
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315 }
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316
45
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317 /**
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318 * Returns the composition text.
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319 * <p>
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320 * The text for an IME is the characters in the widget that
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321 * are in the current composition. When the commit count is
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322 * equal to the length of the composition text, then the
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323 * in-line edit operation is complete.
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324 * </p>
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325 *
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326 * @return the widget text
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327 *
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328 * @exception DWTException <ul>
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329 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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330 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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331 * </ul>
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332 */
0
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333 public String getText () {
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334 checkWidget ();
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335 return text;
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336 }
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337
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338 /**
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339 * Returns <code>true</code> if the caret should be wide, and
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340 * <code>false</code> otherwise. In some languages, for example
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341 * Korean, the caret is typically widened to the width of the
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342 * current character in the in-line edit session.
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343 *
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344 * @return the wide caret state
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345 *
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346 * @exception DWTException <ul>
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347 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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348 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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349 * </ul>
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350 */
0
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351 public bool getWideCaret() {
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352 return false;
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353 }
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354
45
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355 bool hasMarkedText (int /*long*/ id, int /*long*/ sel) {
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356 return text.length () !is 0;
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357 }
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358
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359 bool insertText (int /*long*/ id, int /*long*/ sel, int /*long*/ string) {
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360 if (startOffset is -1) return true;
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361 NSString str = new NSString (string);
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362 if (str.isKindOfClass (OS.objc_getClass ("NSAttributedString"))) {
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363 str = new NSAttributedString (string).string ();
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364 }
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365 int length = (int)/*64*/str.length ();
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366 int end = startOffset + text.length ();
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367 ranges = null;
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368 styles = null;
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369 caretOffset = commitCount = length;
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370 Event event = new Event ();
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371 event.detail = DWT.COMPOSITION_CHANGED;
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372 event.start = startOffset;
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373 event.end = end;
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374 event.text = text = str.getString();
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375 sendEvent (DWT.ImeComposition, event);
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376 text = "";
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377 caretOffset = commitCount = 0;
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378 startOffset = -1;
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379 return event.doit;
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380 }
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381
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382 bool isInlineEnabled () {
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383 return hooks (DWT.ImeComposition);
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384 }
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385
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386 NSRange markedRange (int /*long*/ id, int /*long*/ sel) {
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387 if (startOffset is -1) {
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388 Event event = new Event ();
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389 event.detail = DWT.COMPOSITION_SELECTION;
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390 sendEvent (DWT.ImeComposition, event);
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391 startOffset = event.start;
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392 }
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393 NSRange range = new NSRange ();
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394 range.location = startOffset;
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395 range.length = text.length ();
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396 return range;
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397 }
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398
0
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399 void releaseParent () {
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diff changeset
400 super.releaseParent ();
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401 if (this is parent.getIME ()) parent.setIME (null);
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402 }
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403
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diff changeset
404 void releaseWidget () {
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parents:
diff changeset
405 super.releaseWidget ();
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diff changeset
406 parent = null;
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407 text = null;
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408 styles = null;
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409 ranges = null;
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410 }
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diff changeset
411
45
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412 NSRange selectedRange (int /*long*/ id, int /*long*/ sel) {
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413 Event event = new Event ();
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414 event.detail = DWT.COMPOSITION_SELECTION;
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415 sendEvent (DWT.ImeComposition, event);
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416 NSRange range = new NSRange ();
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417 range.location = event.start;
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418 range.length = event.text.length ();
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419 return range;
0
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420 }
45
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421
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diff changeset
422 /**
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423 * Sets the offset of the composition from the start of the document.
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424 * This is the start offset of the composition within the document and
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425 * in not changed by the input method editor itself during the in-line edit
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426 * session but may need to be changed by clients of the IME. For example,
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427 * if during an in-line edit operation, a text editor inserts characters
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428 * above the IME, then the IME must be informed that the composition
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diff changeset
429 * offset has changed.
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430 *
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431 * @return the offset of the composition
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432 *
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433 * @exception DWTException <ul>
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434 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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435 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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436 * </ul>
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437 */
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438 public void setCompositionOffset (int offset) {
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439 checkWidget ();
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440 if (offset < 0) return;
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441 if (startOffset !is -1) {
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442 startOffset = offset;
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443 }
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444 }
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445
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446 bool setMarkedText_selectedRange (int /*long*/ id, int /*long*/ sel, int /*long*/ string, int /*long*/ selRange) {
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447 if (!isInlineEnabled ()) return true;
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448 ranges = null;
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449 styles = null;
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450 caretOffset = commitCount = 0;
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451 int end = startOffset + text.length ();
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452 if (startOffset is -1) {
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453 Event event = new Event ();
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454 event.detail = DWT.COMPOSITION_SELECTION;
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455 sendEvent (DWT.ImeComposition, event);
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456 startOffset = event.start;
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457 end = event.end;
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458 }
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459 NSString str = new NSString (string);
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460 if (str.isKindOfClass (OS.objc_getClass ("NSAttributedString"))) {
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461 NSAttributedString attribStr = new NSAttributedString (string);
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462 str = attribStr.string ();
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463 int length = (int)/*64*/str.length ();
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464 styles = new TextStyle [length];
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465 ranges = new int [length * 2];
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466 NSRange rangeLimit = new NSRange (), effectiveRange = new NSRange ();
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467 rangeLimit.length = length;
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468 int rangeCount = 0;
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469 int /*long*/ ptr = OS.malloc (NSRange.sizeof);
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470 for (int i = 0; i < length;) {
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471 NSDictionary attribs = attribStr.attributesAtIndex(i, ptr, rangeLimit);
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472 OS.memmove (effectiveRange, ptr, NSRange.sizeof);
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473 i = (int)/*64*/(effectiveRange.location + effectiveRange.length);
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474 ranges [rangeCount * 2] = (int)/*64*/effectiveRange.location;
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475 ranges [rangeCount * 2 + 1] = (int)/*64*/(effectiveRange.location + effectiveRange.length - 1);
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476 styles [rangeCount++] = getStyle (attribs);
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477 }
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478 OS.free (ptr);
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479 if (rangeCount !is styles.length) {
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480 TextStyle [] newStyles = new TextStyle [rangeCount];
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481 System.arraycopy (styles, 0, newStyles, 0, newStyles.length);
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482 styles = newStyles;
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483 int [] newRanges = new int [rangeCount * 2];
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diff changeset
484 System.arraycopy (ranges, 0, newRanges, 0, newRanges.length);
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485 ranges = newRanges;
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486 }
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487 }
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488 int length = (int)/*64*/str.length ();
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489 if (ranges is null && length > 0) {
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490 styles = new TextStyle []{getStyle (display.markedAttributes)};
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491 ranges = new int[]{0, length - 1};
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492 }
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493 NSRange range = new NSRange ();
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494 OS.memmove (range, selRange, NSRange.sizeof);
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495 caretOffset = (int)/*64*/range.location;
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496 Event event = new Event ();
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497 event.detail = DWT.COMPOSITION_CHANGED;
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498 event.start = startOffset;
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499 event.end = end;
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500 event.text = text = str.getString();
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501 sendEvent (DWT.ImeComposition, event);
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502 return true;
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503 }
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504
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505 int /*long*/ validAttributesForMarkedText (int /*long*/ id, int /*long*/ sel) {
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506 NSMutableArray attribs = NSMutableArray.arrayWithCapacity (6);
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507 attribs.addObject (new NSString (OS.NSForegroundColorAttributeName ()));
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508 attribs.addObject (new NSString (OS.NSBackgroundColorAttributeName ()));
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509 attribs.addObject (new NSString (OS.NSUnderlineStyleAttributeName ()));
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diff changeset
510 attribs.addObject (new NSString (OS.NSUnderlineColorAttributeName ()));
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diff changeset
511 attribs.addObject (new NSString (OS.NSStrikethroughStyleAttributeName ()));
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diff changeset
512 attribs.addObject (new NSString (OS.NSStrikethroughColorAttributeName ()));
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diff changeset
513 return attribs.id;
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diff changeset
514 }
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diff changeset
515
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diff changeset
516 }