J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package javax.swing.plaf.basic; |
| 26 | |
| 27 | import java.beans.*; |
| 28 | import java.awt.*; |
| 29 | import java.awt.event.KeyEvent; |
| 30 | import java.awt.event.InputEvent; |
| 31 | import javax.swing.*; |
| 32 | import javax.swing.event.DocumentEvent; |
| 33 | import javax.swing.text.*; |
| 34 | import javax.swing.plaf.*; |
| 35 | |
| 36 | /** |
| 37 | * Provides the look and feel for a plain text editor. In this |
| 38 | * implementation the default UI is extended to act as a simple |
| 39 | * view factory. |
| 40 | * <p> |
| 41 | * <strong>Warning:</strong> |
| 42 | * Serialized objects of this class will not be compatible with |
| 43 | * future Swing releases. The current serialization support is |
| 44 | * appropriate for short term storage or RMI between applications running |
| 45 | * the same version of Swing. As of 1.4, support for long term storage |
| 46 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 47 | * has been added to the <code>java.beans</code> package. |
| 48 | * Please see {@link java.beans.XMLEncoder}. |
| 49 | * |
| 50 | * @author Timothy Prinzing |
| 51 | */ |
| 52 | public class BasicTextAreaUI extends BasicTextUI { |
| 53 | |
| 54 | /** |
| 55 | * Creates a UI for a JTextArea. |
| 56 | * |
| 57 | * @param ta a text area |
| 58 | * @return the UI |
| 59 | */ |
| 60 | public static ComponentUI createUI(JComponent ta) { |
| 61 | return new BasicTextAreaUI(); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Constructs a new BasicTextAreaUI object. |
| 66 | */ |
| 67 | public BasicTextAreaUI() { |
| 68 | super(); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Fetches the name used as a key to look up properties through the |
| 73 | * UIManager. This is used as a prefix to all the standard |
| 74 | * text properties. |
| 75 | * |
| 76 | * @return the name ("TextArea") |
| 77 | */ |
| 78 | protected String getPropertyPrefix() { |
| 79 | return "TextArea"; |
| 80 | } |
| 81 | |
| 82 | protected void installDefaults() { |
| 83 | super.installDefaults(); |
| 84 | //the fix for 4785160 is undone |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * This method gets called when a bound property is changed |
| 89 | * on the associated JTextComponent. This is a hook |
| 90 | * which UI implementations may change to reflect how the |
| 91 | * UI displays bound properties of JTextComponent subclasses. |
| 92 | * This is implemented to rebuild the View when the |
| 93 | * <em>WrapLine</em> or the <em>WrapStyleWord</em> property changes. |
| 94 | * |
| 95 | * @param evt the property change event |
| 96 | */ |
| 97 | protected void propertyChange(PropertyChangeEvent evt) { |
| 98 | super.propertyChange(evt); |
| 99 | if (evt.getPropertyName().equals("lineWrap") || |
| 100 | evt.getPropertyName().equals("wrapStyleWord") || |
| 101 | evt.getPropertyName().equals("tabSize")) { |
| 102 | // rebuild the view |
| 103 | modelChanged(); |
| 104 | } else if ("editable".equals(evt.getPropertyName())) { |
| 105 | updateFocusTraversalKeys(); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | |
| 110 | /** |
| 111 | * The method is overridden to take into account caret width. |
| 112 | * |
| 113 | * @param c the editor component |
| 114 | * @return the preferred size |
| 115 | * @throws IllegalArgumentException if invalid value is passed |
| 116 | * |
| 117 | * @since 1.5 |
| 118 | */ |
| 119 | public Dimension getPreferredSize(JComponent c) { |
| 120 | return super.getPreferredSize(c); |
| 121 | //the fix for 4785160 is undone |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * The method is overridden to take into account caret width. |
| 126 | * |
| 127 | * @param c the editor component |
| 128 | * @return the minimum size |
| 129 | * @throws IllegalArgumentException if invalid value is passed |
| 130 | * |
| 131 | * @since 1.5 |
| 132 | */ |
| 133 | public Dimension getMinimumSize(JComponent c) { |
| 134 | return super.getMinimumSize(c); |
| 135 | //the fix for 4785160 is undone |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Creates the view for an element. Returns a WrappedPlainView or |
| 140 | * PlainView. |
| 141 | * |
| 142 | * @param elem the element |
| 143 | * @return the view |
| 144 | */ |
| 145 | public View create(Element elem) { |
| 146 | Document doc = elem.getDocument(); |
| 147 | Object i18nFlag = doc.getProperty("i18n"/*AbstractDocument.I18NProperty*/); |
| 148 | if ((i18nFlag != null) && i18nFlag.equals(Boolean.TRUE)) { |
| 149 | // build a view that support bidi |
| 150 | return createI18N(elem); |
| 151 | } else { |
| 152 | JTextComponent c = getComponent(); |
| 153 | if (c instanceof JTextArea) { |
| 154 | JTextArea area = (JTextArea) c; |
| 155 | View v; |
| 156 | if (area.getLineWrap()) { |
| 157 | v = new WrappedPlainView(elem, area.getWrapStyleWord()); |
| 158 | } else { |
| 159 | v = new PlainView(elem); |
| 160 | } |
| 161 | return v; |
| 162 | } |
| 163 | } |
| 164 | return null; |
| 165 | } |
| 166 | |
| 167 | View createI18N(Element elem) { |
| 168 | String kind = elem.getName(); |
| 169 | if (kind != null) { |
| 170 | if (kind.equals(AbstractDocument.ContentElementName)) { |
| 171 | return new PlainParagraph(elem); |
| 172 | } else if (kind.equals(AbstractDocument.ParagraphElementName)) { |
| 173 | return new BoxView(elem, View.Y_AXIS); |
| 174 | } |
| 175 | } |
| 176 | return null; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Returns the baseline. |
| 181 | * |
| 182 | * @throws NullPointerException {@inheritDoc} |
| 183 | * @throws IllegalArgumentException {@inheritDoc} |
| 184 | * @see javax.swing.JComponent#getBaseline(int, int) |
| 185 | * @since 1.6 |
| 186 | */ |
| 187 | public int getBaseline(JComponent c, int width, int height) { |
| 188 | super.getBaseline(c, width, height); |
| 189 | Object i18nFlag = ((JTextComponent)c).getDocument(). |
| 190 | getProperty("i18n"); |
| 191 | Insets insets = c.getInsets(); |
| 192 | if (Boolean.TRUE.equals(i18nFlag)) { |
| 193 | View rootView = getRootView((JTextComponent)c); |
| 194 | if (rootView.getViewCount() > 0) { |
| 195 | height = height - insets.top - insets.bottom; |
| 196 | int baseline = insets.top; |
| 197 | int fieldBaseline = BasicHTML.getBaseline( |
| 198 | rootView.getView(0), width - insets.left - |
| 199 | insets.right, height); |
| 200 | if (fieldBaseline < 0) { |
| 201 | return -1; |
| 202 | } |
| 203 | return baseline + fieldBaseline; |
| 204 | } |
| 205 | return -1; |
| 206 | } |
| 207 | FontMetrics fm = c.getFontMetrics(c.getFont()); |
| 208 | return insets.top + fm.getAscent(); |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Returns an enum indicating how the baseline of the component |
| 213 | * changes as the size changes. |
| 214 | * |
| 215 | * @throws NullPointerException {@inheritDoc} |
| 216 | * @see javax.swing.JComponent#getBaseline(int, int) |
| 217 | * @since 1.6 |
| 218 | */ |
| 219 | public Component.BaselineResizeBehavior getBaselineResizeBehavior( |
| 220 | JComponent c) { |
| 221 | super.getBaselineResizeBehavior(c); |
| 222 | return Component.BaselineResizeBehavior.CONSTANT_ASCENT; |
| 223 | } |
| 224 | |
| 225 | |
| 226 | /** |
| 227 | * Paragraph for representing plain-text lines that support |
| 228 | * bidirectional text. |
| 229 | */ |
| 230 | static class PlainParagraph extends ParagraphView { |
| 231 | |
| 232 | PlainParagraph(Element elem) { |
| 233 | super(elem); |
| 234 | layoutPool = new LogicalView(elem); |
| 235 | layoutPool.setParent(this); |
| 236 | } |
| 237 | |
| 238 | public void setParent(View parent) { |
| 239 | super.setParent(parent); |
| 240 | if (parent != null) { |
| 241 | setPropertiesFromAttributes(); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | protected void setPropertiesFromAttributes() { |
| 246 | Component c = getContainer(); |
| 247 | if ((c != null) && (! c.getComponentOrientation().isLeftToRight())) { |
| 248 | setJustification(StyleConstants.ALIGN_RIGHT); |
| 249 | } else { |
| 250 | setJustification(StyleConstants.ALIGN_LEFT); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Fetch the constraining span to flow against for |
| 256 | * the given child index. |
| 257 | */ |
| 258 | public int getFlowSpan(int index) { |
| 259 | Component c = getContainer(); |
| 260 | if (c instanceof JTextArea) { |
| 261 | JTextArea area = (JTextArea) c; |
| 262 | if (! area.getLineWrap()) { |
| 263 | // no limit if unwrapped |
| 264 | return Integer.MAX_VALUE; |
| 265 | } |
| 266 | } |
| 267 | return super.getFlowSpan(index); |
| 268 | } |
| 269 | |
| 270 | protected SizeRequirements calculateMinorAxisRequirements(int axis, |
| 271 | SizeRequirements r) { |
| 272 | SizeRequirements req = super.calculateMinorAxisRequirements(axis, r); |
| 273 | Component c = getContainer(); |
| 274 | if (c instanceof JTextArea) { |
| 275 | JTextArea area = (JTextArea) c; |
| 276 | if (! area.getLineWrap()) { |
| 277 | // min is pref if unwrapped |
| 278 | req.minimum = req.preferred; |
| 279 | } else { |
| 280 | req.minimum = 0; |
| 281 | req.preferred = getWidth(); |
| 282 | if (req.preferred == Integer.MAX_VALUE) { |
| 283 | // We have been initially set to MAX_VALUE, but we |
| 284 | // don't want this as our preferred. |
| 285 | req.preferred = 100; |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | return req; |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Sets the size of the view. If the size has changed, layout |
| 294 | * is redone. The size is the full size of the view including |
| 295 | * the inset areas. |
| 296 | * |
| 297 | * @param width the width >= 0 |
| 298 | * @param height the height >= 0 |
| 299 | */ |
| 300 | public void setSize(float width, float height) { |
| 301 | if ((int) width != getWidth()) { |
| 302 | preferenceChanged(null, true, true); |
| 303 | } |
| 304 | super.setSize(width, height); |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * This class can be used to represent a logical view for |
| 309 | * a flow. It keeps the children updated to reflect the state |
| 310 | * of the model, gives the logical child views access to the |
| 311 | * view hierarchy, and calculates a preferred span. It doesn't |
| 312 | * do any rendering, layout, or model/view translation. |
| 313 | */ |
| 314 | static class LogicalView extends CompositeView { |
| 315 | |
| 316 | LogicalView(Element elem) { |
| 317 | super(elem); |
| 318 | } |
| 319 | |
| 320 | protected int getViewIndexAtPosition(int pos) { |
| 321 | Element elem = getElement(); |
| 322 | if (elem.getElementCount() > 0) { |
| 323 | return elem.getElementIndex(pos); |
| 324 | } |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | protected boolean updateChildren(DocumentEvent.ElementChange ec, |
| 329 | DocumentEvent e, ViewFactory f) { |
| 330 | return false; |
| 331 | } |
| 332 | |
| 333 | protected void loadChildren(ViewFactory f) { |
| 334 | Element elem = getElement(); |
| 335 | if (elem.getElementCount() > 0) { |
| 336 | super.loadChildren(f); |
| 337 | } else { |
| 338 | View v = new GlyphView(elem); |
| 339 | append(v); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | public float getPreferredSpan(int axis) { |
| 344 | if( getViewCount() != 1 ) |
| 345 | throw new Error("One child view is assumed."); |
| 346 | |
| 347 | View v = getView(0); |
| 348 | return v.getPreferredSpan(axis); |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * Forward the DocumentEvent to the given child view. This |
| 353 | * is implemented to reparent the child to the logical view |
| 354 | * (the children may have been parented by a row in the flow |
| 355 | * if they fit without breaking) and then execute the superclass |
| 356 | * behavior. |
| 357 | * |
| 358 | * @param v the child view to forward the event to. |
| 359 | * @param e the change information from the associated document |
| 360 | * @param a the current allocation of the view |
| 361 | * @param f the factory to use to rebuild if the view has children |
| 362 | * @see #forwardUpdate |
| 363 | * @since 1.3 |
| 364 | */ |
| 365 | protected void forwardUpdateToView(View v, DocumentEvent e, |
| 366 | Shape a, ViewFactory f) { |
| 367 | v.setParent(this); |
| 368 | super.forwardUpdateToView(v, e, a, f); |
| 369 | } |
| 370 | |
| 371 | // The following methods don't do anything useful, they |
| 372 | // simply keep the class from being abstract. |
| 373 | |
| 374 | public void paint(Graphics g, Shape allocation) { |
| 375 | } |
| 376 | |
| 377 | protected boolean isBefore(int x, int y, Rectangle alloc) { |
| 378 | return false; |
| 379 | } |
| 380 | |
| 381 | protected boolean isAfter(int x, int y, Rectangle alloc) { |
| 382 | return false; |
| 383 | } |
| 384 | |
| 385 | protected View getViewAtPoint(int x, int y, Rectangle alloc) { |
| 386 | return null; |
| 387 | } |
| 388 | |
| 389 | protected void childAllocation(int index, Rectangle a) { |
| 390 | } |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | } |