| 1 | /* |
| 2 | GNU Lesser General Public License |
| 3 | |
| 4 | RelativeImageView |
| 5 | Copyright (C) 2001 Frits Jalvingh & Howard Kistler |
| 6 | |
| 7 | This library is free software; you can redistribute it and/or |
| 8 | modify it under the terms of the GNU Lesser General Public |
| 9 | License as published by the Free Software Foundation; either |
| 10 | version 2.1 of the License, or (at your option) any later version. |
| 11 | |
| 12 | This library is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | Lesser General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU Lesser General Public |
| 18 | License along with this library; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | package com.hexidec.ekit.component; |
| 23 | |
| 24 | import java.awt.Color; |
| 25 | import java.awt.Component; |
| 26 | import java.awt.Container; |
| 27 | import java.awt.Dimension; |
| 28 | import java.awt.Graphics; |
| 29 | import java.awt.Image; |
| 30 | import java.awt.Point; |
| 31 | import java.awt.Rectangle; |
| 32 | import java.awt.Shape; |
| 33 | import java.awt.Toolkit; |
| 34 | import java.awt.event.MouseEvent; |
| 35 | import java.awt.event.MouseListener; |
| 36 | import java.awt.event.MouseMotionListener; |
| 37 | import java.awt.image.ImageObserver; |
| 38 | import java.io.BufferedInputStream; |
| 39 | import java.io.ByteArrayOutputStream; |
| 40 | import java.io.File; |
| 41 | import java.io.InputStream; |
| 42 | import java.io.IOException; |
| 43 | import java.net.MalformedURLException; |
| 44 | import java.net.URL; |
| 45 | import java.util.Dictionary; |
| 46 | import javax.swing.Icon; |
| 47 | import javax.swing.ImageIcon; |
| 48 | import javax.swing.JEditorPane; |
| 49 | import javax.swing.text.AbstractDocument; |
| 50 | import javax.swing.text.AttributeSet; |
| 51 | import javax.swing.text.BadLocationException; |
| 52 | import javax.swing.text.Document; |
| 53 | import javax.swing.text.Element; |
| 54 | import javax.swing.text.JTextComponent; |
| 55 | import javax.swing.text.MutableAttributeSet; |
| 56 | import javax.swing.text.Position; |
| 57 | import javax.swing.text.SimpleAttributeSet; |
| 58 | import javax.swing.text.StyledDocument; |
| 59 | import javax.swing.text.View; |
| 60 | import javax.swing.text.ViewFactory; |
| 61 | import javax.swing.text.html.HTML; |
| 62 | import javax.swing.text.html.HTMLDocument; |
| 63 | import javax.swing.text.html.StyleSheet; |
| 64 | import javax.swing.event.DocumentEvent; |
| 65 | |
| 66 | /** |
| 67 | * @author <a href="mailto:jal@grimor.com">Frits Jalvingh</a> |
| 68 | * @version 1.0 |
| 69 | * |
| 70 | * This code was modeled after an artice on |
| 71 | * <a href="http://www.javaworld.com/javaworld/javatips/jw-javatip109.html"> |
| 72 | * JavaWorld</a> by Bob Kenworthy. |
| 73 | */ |
| 74 | |
| 75 | public class RelativeImageView extends View implements ImageObserver, MouseListener, MouseMotionListener |
| 76 | { |
| 77 | public static final String TOP = "top"; |
| 78 | public static final String TEXTTOP = "texttop"; |
| 79 | public static final String MIDDLE = "middle"; |
| 80 | public static final String ABSMIDDLE = "absmiddle"; |
| 81 | public static final String CENTER = "center"; |
| 82 | public static final String BOTTOM = "bottom"; |
| 83 | public static final String IMAGE_CACHE_PROPERTY = "imageCache"; |
| 84 | |
| 85 | private static Icon sPendingImageIcon; |
| 86 | private static Icon sMissingImageIcon; |
| 87 | private static final String PENDING_IMAGE_SRC = "icons/ImagePendingHK.gif"; |
| 88 | private static final String MISSING_IMAGE_SRC = "icons/ImageMissingHK.gif"; |
| 89 | private static final int DEFAULT_WIDTH = 32; |
| 90 | private static final int DEFAULT_HEIGHT = 32; |
| 91 | private static final int DEFAULT_BORDER = 1; |
| 92 | |
| 93 | private AttributeSet attr; |
| 94 | private Element fElement; |
| 95 | private Image fImage; |
| 96 | private int fHeight; |
| 97 | private int fWidth; |
| 98 | private Container fContainer; |
| 99 | private Rectangle fBounds; |
| 100 | private Component fComponent; |
| 101 | private Point fGrowBase; // base of drag while growing image |
| 102 | private boolean fGrowProportionally; // should grow be proportional? |
| 103 | private String BaseUrl; |
| 104 | private boolean bLoading; // set to true while the receiver is locked, to indicate the reciever is loading the image. This is used in imageUpdate. |
| 105 | |
| 106 | /** Constructor |
| 107 | * Creates a new view that represents an IMG element. |
| 108 | * @param elem the element to create a view for |
| 109 | */ |
| 110 | public RelativeImageView(Element elem,String baseurl) |
| 111 | { |
| 112 | super(elem); |
| 113 | BaseUrl = baseurl; |
| 114 | initialize(elem); |
| 115 | StyleSheet sheet = getStyleSheet(); |
| 116 | attr = sheet.getViewAttributes(this); |
| 117 | } |
| 118 | |
| 119 | private void initialize(Element elem) |
| 120 | { |
| 121 | synchronized(this) |
| 122 | { |
| 123 | bLoading = true; |
| 124 | fWidth = 0; |
| 125 | fHeight = 0; |
| 126 | } |
| 127 | int width = 0; |
| 128 | int height = 0; |
| 129 | boolean customWidth = false; |
| 130 | boolean customHeight = false; |
| 131 | try |
| 132 | { |
| 133 | fElement = elem; |
| 134 | // request image from document's cache |
| 135 | AttributeSet attr = elem.getAttributes(); |
| 136 | if(true || isURL()) |
| 137 | { |
| 138 | URL src = getSourceURL(); |
| 139 | if(src != null) |
| 140 | { |
| 141 | Dictionary cache = (Dictionary)getDocument().getProperty(IMAGE_CACHE_PROPERTY); |
| 142 | if(cache != null) |
| 143 | { |
| 144 | fImage = (Image)cache.get(src); |
| 145 | } |
| 146 | else |
| 147 | { |
| 148 | fImage = Toolkit.getDefaultToolkit().getImage(src); |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | else |
| 153 | { |
| 154 | // load image from relative path |
| 155 | String src = (String)fElement.getAttributes().getAttribute(HTML.Attribute.SRC); |
| 156 | src = processSrcPath(src); |
| 157 | fImage = Toolkit.getDefaultToolkit().createImage(src); |
| 158 | try |
| 159 | { |
| 160 | waitForImage(); |
| 161 | } |
| 162 | catch(InterruptedException ie) |
| 163 | { |
| 164 | fImage = null; |
| 165 | // possibly replace with the ImageBroken icon, if that's what is happening |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | // get height & width from params or image or defaults |
| 170 | height = getIntAttr(HTML.Attribute.HEIGHT, -1); |
| 171 | customHeight = (height > 0); |
| 172 | if(!customHeight && fImage != null) |
| 173 | { |
| 174 | height = fImage.getHeight(this); |
| 175 | } |
| 176 | if(height <= 0) |
| 177 | { |
| 178 | height = DEFAULT_HEIGHT; |
| 179 | } |
| 180 | |
| 181 | width = getIntAttr(HTML.Attribute.WIDTH, -1); |
| 182 | customWidth = (width > 0); |
| 183 | if(!customWidth && fImage != null) |
| 184 | { |
| 185 | width = fImage.getWidth(this); |
| 186 | } |
| 187 | if(width <= 0) |
| 188 | { |
| 189 | width = DEFAULT_WIDTH; |
| 190 | } |
| 191 | |
| 192 | if(fImage != null) |
| 193 | { |
| 194 | if(customHeight && customWidth) |
| 195 | { |
| 196 | Toolkit.getDefaultToolkit().prepareImage(fImage, height, width, this); |
| 197 | } |
| 198 | else |
| 199 | { |
| 200 | Toolkit.getDefaultToolkit().prepareImage(fImage, -1, -1, this); |
| 201 | } |
| 202 | } |
| 203 | } |
| 204 | finally |
| 205 | { |
| 206 | synchronized(this) |
| 207 | { |
| 208 | bLoading = false; |
| 209 | if(customHeight || fHeight == 0) |
| 210 | { |
| 211 | fHeight = height; |
| 212 | } |
| 213 | if(customWidth || fWidth == 0) |
| 214 | { |
| 215 | fWidth = width; |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /** Determines if path is in the form of a URL |
| 222 | */ |
| 223 | private boolean isURL() |
| 224 | { |
| 225 | String src = (String)fElement.getAttributes().getAttribute(HTML.Attribute.SRC); |
| 226 | return src.toLowerCase().startsWith("file") || src.toLowerCase().startsWith("http"); |
| 227 | } |
| 228 | |
| 229 | /** Checks to see if the absolute path is availabe thru an application |
| 230 | * global static variable or thru a system variable. If so, appends |
| 231 | * the relative path to the absolute path and returns the String. |
| 232 | */ |
| 233 | private String processSrcPath(String src) |
| 234 | { |
| 235 | String val = src; |
| 236 | File imageFile = new File(src); |
| 237 | if(imageFile.isAbsolute()) |
| 238 | { |
| 239 | return src; |
| 240 | } |
| 241 | boolean found = false; |
| 242 | Document doc = getDocument(); |
| 243 | if(doc != null) |
| 244 | { |
| 245 | String pv = (String)doc.getProperty("com.hexidec.ekit.docsource"); |
| 246 | if(pv != null) |
| 247 | { |
| 248 | File f = new File(pv); |
| 249 | val = (new File(f.getParent(), imageFile.getPath().toString())).toString(); |
| 250 | found = true; |
| 251 | } |
| 252 | } |
| 253 | if(!found) |
| 254 | { |
| 255 | String imagePath = System.getProperty("system.image.path.key"); |
| 256 | if(imagePath != null) |
| 257 | { |
| 258 | val = (new File(imagePath, imageFile.getPath())).toString(); |
| 259 | } |
| 260 | } |
| 261 | return val; |
| 262 | } |
| 263 | |
| 264 | /** Method insures that the image is loaded and not a broken reference |
| 265 | */ |
| 266 | private void waitForImage() |
| 267 | throws InterruptedException |
| 268 | { |
| 269 | int w = fImage.getWidth(this); |
| 270 | int h = fImage.getHeight(this); |
| 271 | while (true) |
| 272 | { |
| 273 | int flags = Toolkit.getDefaultToolkit().checkImage(fImage, w, h, this); |
| 274 | if(((flags & ERROR) != 0) || ((flags & ABORT) != 0 )) |
| 275 | { |
| 276 | throw new InterruptedException(); |
| 277 | } |
| 278 | else if((flags & (ALLBITS | FRAMEBITS)) != 0) |
| 279 | { |
| 280 | return; |
| 281 | } |
| 282 | Thread.sleep(10); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | /** Fetches the attributes to use when rendering. This is |
| 287 | * implemented to multiplex the attributes specified in the |
| 288 | * model with a StyleSheet. |
| 289 | */ |
| 290 | public AttributeSet getAttributes() |
| 291 | { |
| 292 | return attr; |
| 293 | } |
| 294 | |
| 295 | /** Method tests whether the image within a link |
| 296 | */ |
| 297 | boolean isLink() |
| 298 | { |
| 299 | AttributeSet anchorAttr = (AttributeSet)fElement.getAttributes().getAttribute(HTML.Tag.A); |
| 300 | if(anchorAttr != null) |
| 301 | { |
| 302 | return anchorAttr.isDefined(HTML.Attribute.HREF); |
| 303 | } |
| 304 | return false; |
| 305 | } |
| 306 | |
| 307 | /** Method returns the size of the border to use |
| 308 | */ |
| 309 | int getBorder() |
| 310 | { |
| 311 | return getIntAttr(HTML.Attribute.BORDER, isLink() ? DEFAULT_BORDER : 0); |
| 312 | } |
| 313 | |
| 314 | /** Method returns the amount of extra space to add along an axis |
| 315 | */ |
| 316 | int getSpace(int axis) |
| 317 | { |
| 318 | return getIntAttr((axis == X_AXIS) ? HTML.Attribute.HSPACE : HTML.Attribute.VSPACE, 0); |
| 319 | } |
| 320 | |
| 321 | /** Method returns the border's color, or null if this is not a link |
| 322 | */ |
| 323 | Color getBorderColor() |
| 324 | { |
| 325 | StyledDocument doc = (StyledDocument)getDocument(); |
| 326 | return doc.getForeground(getAttributes()); |
| 327 | } |
| 328 | |
| 329 | /** Method returns the image's vertical alignment |
| 330 | */ |
| 331 | float getVerticalAlignment() |
| 332 | { |
| 333 | String align = (String)fElement.getAttributes().getAttribute(HTML.Attribute.ALIGN); |
| 334 | if(align != null) |
| 335 | { |
| 336 | align = align.toLowerCase(); |
| 337 | if(align.equals(TOP) || align.equals(TEXTTOP)) |
| 338 | { |
| 339 | return 0.0f; |
| 340 | } |
| 341 | else if(align.equals(this.CENTER) || align.equals(MIDDLE) || align.equals(ABSMIDDLE)) |
| 342 | { |
| 343 | return 0.5f; |
| 344 | } |
| 345 | } |
| 346 | return 1.0f; // default alignment is bottom |
| 347 | } |
| 348 | |
| 349 | boolean hasPixels(ImageObserver obs) |
| 350 | { |
| 351 | return ((fImage != null) && (fImage.getHeight(obs) > 0) && (fImage.getWidth(obs) > 0)); |
| 352 | } |
| 353 | |
| 354 | /** Method returns a URL for the image source, or null if it could not be determined |
| 355 | */ |
| 356 | private URL getSourceURL() |
| 357 | { |
| 358 | String src = (String)fElement.getAttributes().getAttribute(HTML.Attribute.SRC); |
| 359 | if(src == null) |
| 360 | { |
| 361 | return null; |
| 362 | } |
| 363 | try |
| 364 | { |
| 365 | URL reference = new URL(BaseUrl); |
| 366 | URL u = new URL(reference,src); |
| 367 | return u; |
| 368 | } |
| 369 | catch(MalformedURLException mue) |
| 370 | { |
| 371 | return null; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | /** Method looks up an integer-valued attribute (not recursive!) |
| 376 | */ |
| 377 | private int getIntAttr(HTML.Attribute name, int iDefault) |
| 378 | { |
| 379 | AttributeSet attr = fElement.getAttributes(); |
| 380 | if(attr.isDefined(name)) |
| 381 | { |
| 382 | int i; |
| 383 | String val = (String)attr.getAttribute(name); |
| 384 | if(val == null) |
| 385 | { |
| 386 | i = iDefault; |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | try |
| 391 | { |
| 392 | i = Math.max(0, Integer.parseInt(val)); |
| 393 | } |
| 394 | catch(NumberFormatException nfe) |
| 395 | { |
| 396 | i = iDefault; |
| 397 | } |
| 398 | } |
| 399 | return i; |
| 400 | } |
| 401 | else |
| 402 | { |
| 403 | return iDefault; |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * Establishes the parent view for this view. |
| 409 | * Seize this moment to cache the AWT Container I'm in. |
| 410 | */ |
| 411 | public void setParent(View parent) |
| 412 | { |
| 413 | super.setParent(parent); |
| 414 | fContainer = ((parent != null) ? getContainer() : null); |
| 415 | if((parent == null) && (fComponent != null)) |
| 416 | { |
| 417 | fComponent.getParent().remove(fComponent); |
| 418 | fComponent = null; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | /** My attributes may have changed. */ |
| 423 | public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f) |
| 424 | { |
| 425 | super.changedUpdate(e, a, f); |
| 426 | float align = getVerticalAlignment(); |
| 427 | |
| 428 | int height = fHeight; |
| 429 | int width = fWidth; |
| 430 | |
| 431 | initialize(getElement()); |
| 432 | |
| 433 | boolean hChanged = fHeight != height; |
| 434 | boolean wChanged = fWidth != width; |
| 435 | if(hChanged || wChanged || getVerticalAlignment() != align) |
| 436 | { |
| 437 | getParent().preferenceChanged(this, hChanged, wChanged); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /** |
| 443 | * Paints the image. |
| 444 | * |
| 445 | * @param g the rendering surface to use |
| 446 | * @param a the allocated region to render into |
| 447 | * @see View#paint |
| 448 | */ |
| 449 | public void paint(Graphics g, Shape a) |
| 450 | { |
| 451 | Color oldColor = g.getColor(); |
| 452 | fBounds = a.getBounds(); |
| 453 | int border = getBorder(); |
| 454 | int x = fBounds.x + border + getSpace(X_AXIS); |
| 455 | int y = fBounds.y + border + getSpace(Y_AXIS); |
| 456 | int width = fWidth; |
| 457 | int height = fHeight; |
| 458 | int sel = getSelectionState(); |
| 459 | |
| 460 | // If no pixels yet, draw gray outline and icon |
| 461 | if(!hasPixels(this)) |
| 462 | { |
| 463 | g.setColor(Color.lightGray); |
| 464 | g.drawRect(x, y, width - 1, height - 1); |
| 465 | g.setColor(oldColor); |
| 466 | loadImageStatusIcons(); |
| 467 | Icon icon = ((fImage == null) ? sMissingImageIcon : sPendingImageIcon); |
| 468 | if(icon != null) |
| 469 | { |
| 470 | icon.paintIcon(getContainer(), g, x, y); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | // Draw image |
| 475 | if(fImage != null) |
| 476 | { |
| 477 | g.drawImage(fImage, x, y, width, height, this); |
| 478 | } |
| 479 | |
| 480 | // If selected exactly, we need a black border & grow-box |
| 481 | Color bc = getBorderColor(); |
| 482 | if(sel == 2) |
| 483 | { |
| 484 | // Make sure there's room for a border |
| 485 | int delta = 2 - border; |
| 486 | if(delta > 0) |
| 487 | { |
| 488 | x += delta; |
| 489 | y += delta; |
| 490 | width -= delta << 1; |
| 491 | height -= delta << 1; |
| 492 | border = 2; |
| 493 | } |
| 494 | bc = null; |
| 495 | g.setColor(Color.black); |
| 496 | // Draw grow box |
| 497 | g.fillRect(x + width - 5, y + height - 5, 5, 5); |
| 498 | } |
| 499 | |
| 500 | // Draw border |
| 501 | if(border > 0) |
| 502 | { |
| 503 | if(bc != null) |
| 504 | { |
| 505 | g.setColor(bc); |
| 506 | } |
| 507 | // Draw a thick rectangle: |
| 508 | for(int i = 1; i <= border; i++) |
| 509 | { |
| 510 | g.drawRect(x - i, y - i, width - 1 + i + i, height - 1 + i + i); |
| 511 | } |
| 512 | g.setColor(oldColor); |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | /** Request that this view be repainted. Assumes the view is still at its last-drawn location. |
| 517 | */ |
| 518 | protected void repaint(long delay) |
| 519 | { |
| 520 | if((fContainer != null) && (fBounds != null)) |
| 521 | { |
| 522 | fContainer.repaint(delay, fBounds.x, fBounds.y, fBounds.width, fBounds.height); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | /** |
| 527 | * Determines whether the image is selected, and if it's the only thing selected. |
| 528 | * @return 0 if not selected, 1 if selected, 2 if exclusively selected. |
| 529 | * "Exclusive" selection is only returned when editable. |
| 530 | */ |
| 531 | protected int getSelectionState() |
| 532 | { |
| 533 | int p0 = fElement.getStartOffset(); |
| 534 | int p1 = fElement.getEndOffset(); |
| 535 | if(fContainer instanceof JTextComponent) |
| 536 | { |
| 537 | JTextComponent textComp = (JTextComponent)fContainer; |
| 538 | int start = textComp.getSelectionStart(); |
| 539 | int end = textComp.getSelectionEnd(); |
| 540 | if((start <= p0) && (end >= p1)) |
| 541 | { |
| 542 | if((start == p0) && (end == p1) && isEditable()) |
| 543 | { |
| 544 | return 2; |
| 545 | } |
| 546 | else |
| 547 | { |
| 548 | return 1; |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | protected boolean isEditable() |
| 556 | { |
| 557 | return ((fContainer instanceof JEditorPane) && ((JEditorPane)fContainer).isEditable()); |
| 558 | } |
| 559 | |
| 560 | /** Returns the text editor's highlight color. |
| 561 | */ |
| 562 | protected Color getHighlightColor() |
| 563 | { |
| 564 | JTextComponent textComp = (JTextComponent)fContainer; |
| 565 | return textComp.getSelectionColor(); |
| 566 | } |
| 567 | |
| 568 | // Progressive display ------------------------------------------------- |
| 569 | |
| 570 | // This can come on any thread. If we are in the process of reloading |
| 571 | // the image and determining our state (loading == true) we don't fire |
| 572 | // preference changed, or repaint, we just reset the fWidth/fHeight as |
| 573 | // necessary and return. This is ok as we know when loading finishes |
| 574 | // it will pick up the new height/width, if necessary. |
| 575 | |
| 576 | private static boolean sIsInc = true; |
| 577 | private static int sIncRate = 100; |
| 578 | |
| 579 | public boolean imageUpdate(Image img, int flags, int x, int y, int width, int height) |
| 580 | { |
| 581 | if((fImage == null) || (fImage != img)) |
| 582 | { |
| 583 | return false; |
| 584 | } |
| 585 | |
| 586 | // Bail out if there was an error |
| 587 | if((flags & (ABORT|ERROR)) != 0) |
| 588 | { |
| 589 | fImage = null; |
| 590 | repaint(0); |
| 591 | return false; |
| 592 | } |
| 593 | |
| 594 | // Resize image if necessary |
| 595 | short changed = 0; |
| 596 | if((flags & ImageObserver.HEIGHT) != 0) |
| 597 | { |
| 598 | if(!getElement().getAttributes().isDefined(HTML.Attribute.HEIGHT)) |
| 599 | { |
| 600 | changed |= 1; |
| 601 | } |
| 602 | } |
| 603 | if((flags & ImageObserver.WIDTH) != 0) |
| 604 | { |
| 605 | if(!getElement().getAttributes().isDefined(HTML.Attribute.WIDTH)) |
| 606 | { |
| 607 | changed |= 2; |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | synchronized(this) |
| 612 | { |
| 613 | if((changed & 1) == 1) |
| 614 | { |
| 615 | fWidth = width; |
| 616 | } |
| 617 | if((changed & 2) == 2) |
| 618 | { |
| 619 | fHeight = height; |
| 620 | } |
| 621 | if(bLoading) |
| 622 | { |
| 623 | // No need to resize or repaint, still in the process of loading |
| 624 | return true; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | if(changed != 0) |
| 629 | { |
| 630 | // May need to resize myself, asynchronously |
| 631 | Document doc = getDocument(); |
| 632 | try |
| 633 | { |
| 634 | if(doc instanceof AbstractDocument) |
| 635 | { |
| 636 | ((AbstractDocument)doc).readLock(); |
| 637 | } |
| 638 | preferenceChanged(this, true, true); |
| 639 | } |
| 640 | finally |
| 641 | { |
| 642 | if(doc instanceof AbstractDocument) |
| 643 | { |
| 644 | ((AbstractDocument)doc).readUnlock(); |
| 645 | } |
| 646 | } |
| 647 | return true; |
| 648 | } |
| 649 | |
| 650 | // Repaint when done or when new pixels arrive |
| 651 | if((flags & (FRAMEBITS|ALLBITS)) != 0) |
| 652 | { |
| 653 | repaint(0); |
| 654 | } |
| 655 | else if((flags & SOMEBITS) != 0) |
| 656 | { |
| 657 | if(sIsInc) |
| 658 | { |
| 659 | repaint(sIncRate); |
| 660 | } |
| 661 | } |
| 662 | return ((flags & ALLBITS) == 0); |
| 663 | } |
| 664 | |
| 665 | // Layout -------------------------------------------------------------- |
| 666 | |
| 667 | /** Determines the preferred span for this view along an axis. |
| 668 | * |
| 669 | * @param axis may be either X_AXIS or Y_AXIS |
| 670 | * @returns the span the view would like to be rendered into. |
| 671 | * Typically the view is told to render into the span |
| 672 | * that is returned, although there is no guarantee. |
| 673 | * The parent may choose to resize or break the view. |
| 674 | */ |
| 675 | public float getPreferredSpan(int axis) |
| 676 | { |
| 677 | int extra = 2 * (getBorder() + getSpace(axis)); |
| 678 | switch(axis) |
| 679 | { |
| 680 | case View.X_AXIS: |
| 681 | return fWidth+extra; |
| 682 | case View.Y_AXIS: |
| 683 | return fHeight+extra; |
| 684 | default: |
| 685 | throw new IllegalArgumentException("Invalid axis in getPreferredSpan() : " + axis); |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | /** Determines the desired alignment for this view along an |
| 690 | * axis. This is implemented to give the alignment to the |
| 691 | * bottom of the icon along the y axis, and the default |
| 692 | * along the x axis. |
| 693 | * |
| 694 | * @param axis may be either X_AXIS or Y_AXIS |
| 695 | * @returns the desired alignment. This should be a value |
| 696 | * between 0.0 and 1.0 where 0 indicates alignment at the |
| 697 | * origin and 1.0 indicates alignment to the full span |
| 698 | * away from the origin. An alignment of 0.5 would be the |
| 699 | * center of the view. |
| 700 | */ |
| 701 | public float getAlignment(int axis) |
| 702 | { |
| 703 | switch(axis) |
| 704 | { |
| 705 | case View.Y_AXIS: |
| 706 | return getVerticalAlignment(); |
| 707 | default: |
| 708 | return super.getAlignment(axis); |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | /** Provides a mapping from the document model coordinate space |
| 713 | * to the coordinate space of the view mapped to it. |
| 714 | * |
| 715 | * @param pos the position to convert |
| 716 | * @param a the allocated region to render into |
| 717 | * @return the bounding box of the given position |
| 718 | * @exception BadLocationException if the given position does not represent a |
| 719 | * valid location in the associated document |
| 720 | * @see View#modelToView |
| 721 | */ |
| 722 | public Shape modelToView(int pos, Shape a, Position.Bias b) |
| 723 | throws BadLocationException |
| 724 | { |
| 725 | int p0 = getStartOffset(); |
| 726 | int p1 = getEndOffset(); |
| 727 | if((pos >= p0) && (pos <= p1)) |
| 728 | { |
| 729 | Rectangle r = a.getBounds(); |
| 730 | if(pos == p1) |
| 731 | { |
| 732 | r.x += r.width; |
| 733 | } |
| 734 | r.width = 0; |
| 735 | return r; |
| 736 | } |
| 737 | return null; |
| 738 | } |
| 739 | |
| 740 | /** Provides a mapping from the view coordinate space to the logical |
| 741 | * coordinate space of the model. |
| 742 | * |
| 743 | * @param x the X coordinate |
| 744 | * @param y the Y coordinate |
| 745 | * @param a the allocated region to render into |
| 746 | * @return the location within the model that best represents the |
| 747 | * given point of view |
| 748 | * @see View#viewToModel |
| 749 | */ |
| 750 | public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) |
| 751 | { |
| 752 | Rectangle alloc = (Rectangle) a; |
| 753 | if(x < (alloc.x + alloc.width)) |
| 754 | { |
| 755 | bias[0] = Position.Bias.Forward; |
| 756 | return getStartOffset(); |
| 757 | } |
| 758 | bias[0] = Position.Bias.Backward; |
| 759 | return getEndOffset(); |
| 760 | } |
| 761 | |
| 762 | /** Change the size of this image. This alters the HEIGHT and WIDTH |
| 763 | * attributes of the Element and causes a re-layout. |
| 764 | */ |
| 765 | protected void resize(int width, int height) |
| 766 | { |
| 767 | if((width == fWidth) && (height == fHeight)) |
| 768 | { |
| 769 | return; |
| 770 | } |
| 771 | fWidth = width; |
| 772 | fHeight= height; |
| 773 | // Replace attributes in document |
| 774 | MutableAttributeSet attr = new SimpleAttributeSet(); |
| 775 | attr.addAttribute(HTML.Attribute.WIDTH ,Integer.toString(width)); |
| 776 | attr.addAttribute(HTML.Attribute.HEIGHT,Integer.toString(height)); |
| 777 | ((StyledDocument)getDocument()).setCharacterAttributes(fElement.getStartOffset(), fElement.getEndOffset(), attr, false); |
| 778 | } |
| 779 | |
| 780 | // Mouse event handling ------------------------------------------------ |
| 781 | |
| 782 | /** Select or grow image when clicked. |
| 783 | */ |
| 784 | public void mousePressed(MouseEvent e) |
| 785 | { |
| 786 | Dimension size = fComponent.getSize(); |
| 787 | if((e.getX() >= (size.width - 7)) && (e.getY() >= (size.height - 7)) && (getSelectionState() == 2)) |
| 788 | { |
| 789 | // Click in selected grow-box: |
| 790 | Point loc = fComponent.getLocationOnScreen(); |
| 791 | fGrowBase = new Point(loc.x + e.getX() - fWidth, loc.y + e.getY() - fHeight); |
| 792 | fGrowProportionally = e.isShiftDown(); |
| 793 | } |
| 794 | else |
| 795 | { |
| 796 | // Else select image: |
| 797 | fGrowBase = null; |
| 798 | JTextComponent comp = (JTextComponent)fContainer; |
| 799 | int start = fElement.getStartOffset(); |
| 800 | int end = fElement.getEndOffset(); |
| 801 | int mark = comp.getCaret().getMark(); |
| 802 | int dot = comp.getCaret().getDot(); |
| 803 | if(e.isShiftDown()) |
| 804 | { |
| 805 | // extend selection if shift key down: |
| 806 | if(mark <= start) |
| 807 | { |
| 808 | comp.moveCaretPosition(end); |
| 809 | } |
| 810 | else |
| 811 | { |
| 812 | comp.moveCaretPosition(start); |
| 813 | } |
| 814 | } |
| 815 | else |
| 816 | { |
| 817 | // just select image, without shift: |
| 818 | if(mark != start) |
| 819 | { |
| 820 | comp.setCaretPosition(start); |
| 821 | } |
| 822 | if(dot != end) |
| 823 | { |
| 824 | comp.moveCaretPosition(end); |
| 825 | } |
| 826 | } |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | /** Resize image if initial click was in grow-box: */ |
| 831 | public void mouseDragged(MouseEvent e) |
| 832 | { |
| 833 | if(fGrowBase != null) |
| 834 | { |
| 835 | Point loc = fComponent.getLocationOnScreen(); |
| 836 | int width = Math.max(2, loc.x + e.getX() - fGrowBase.x); |
| 837 | int height= Math.max(2, loc.y + e.getY() - fGrowBase.y); |
| 838 | if(e.isShiftDown() && fImage != null) |
| 839 | { |
| 840 | // Make sure size is proportional to actual image size |
| 841 | float imgWidth = fImage.getWidth(this); |
| 842 | float imgHeight = fImage.getHeight(this); |
| 843 | if((imgWidth > 0) && (imgHeight > 0)) |
| 844 | { |
| 845 | float prop = imgHeight / imgWidth; |
| 846 | float pwidth = height / prop; |
| 847 | float pheight = width * prop; |
| 848 | if(pwidth > width) |
| 849 | { |
| 850 | width = (int)pwidth; |
| 851 | } |
| 852 | else |
| 853 | { |
| 854 | height = (int)pheight; |
| 855 | } |
| 856 | } |
| 857 | } |
| 858 | resize(width,height); |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | public void mouseReleased(MouseEvent me) |
| 863 | { |
| 864 | fGrowBase = null; |
| 865 | //! Should post some command to make the action undo-able |
| 866 | } |
| 867 | |
| 868 | /** On double-click, open image properties dialog. |
| 869 | */ |
| 870 | public void mouseClicked(MouseEvent me) |
| 871 | { |
| 872 | if(me.getClickCount() == 2) |
| 873 | { |
| 874 | //$ IMPLEMENT |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | public void mouseEntered(MouseEvent me) { ; } |
| 879 | public void mouseMoved(MouseEvent me) { ; } |
| 880 | public void mouseExited(MouseEvent me) { ; } |
| 881 | |
| 882 | // Static icon accessors ----------------------------------------------- |
| 883 | |
| 884 | private Icon makeIcon(final String gifFile) |
| 885 | throws IOException |
| 886 | { |
| 887 | /* Copy resource into a byte array. This is |
| 888 | * necessary because several browsers consider |
| 889 | * Class.getResource a security risk because it |
| 890 | * can be used to load additional classes. |
| 891 | * Class.getResourceAsStream just returns raw |
| 892 | * bytes, which we can convert to an image. |
| 893 | */ |
| 894 | InputStream resource = RelativeImageView.class.getResourceAsStream(gifFile); |
| 895 | |
| 896 | if(resource == null) |
| 897 | { |
| 898 | return null; |
| 899 | } |
| 900 | BufferedInputStream in = new BufferedInputStream(resource); |
| 901 | ByteArrayOutputStream out = new ByteArrayOutputStream(1024); |
| 902 | byte[] buffer = new byte[1024]; |
| 903 | int n; |
| 904 | while((n = in.read(buffer)) > 0) |
| 905 | { |
| 906 | out.write(buffer, 0, n); |
| 907 | } |
| 908 | in.close(); |
| 909 | out.flush(); |
| 910 | |
| 911 | buffer = out.toByteArray(); |
| 912 | if(buffer.length == 0) |
| 913 | { |
| 914 | System.err.println("WARNING : " + gifFile + " is zero-length"); |
| 915 | return null; |
| 916 | } |
| 917 | return new ImageIcon(buffer); |
| 918 | } |
| 919 | |
| 920 | private void loadImageStatusIcons() |
| 921 | { |
| 922 | try |
| 923 | { |
| 924 | if(sPendingImageIcon == null) |
| 925 | { |
| 926 | sPendingImageIcon = makeIcon(PENDING_IMAGE_SRC); |
| 927 | } |
| 928 | if(sMissingImageIcon == null) |
| 929 | { |
| 930 | sMissingImageIcon = makeIcon(MISSING_IMAGE_SRC); |
| 931 | } |
| 932 | } |
| 933 | catch(Exception e) |
| 934 | { |
| 935 | System.err.println("ImageView : Couldn't load image icons"); |
| 936 | } |
| 937 | } |
| 938 | |
| 939 | protected StyleSheet getStyleSheet() |
| 940 | { |
| 941 | HTMLDocument doc = (HTMLDocument)getDocument(); |
| 942 | return doc.getStyleSheet(); |
| 943 | } |
| 944 | |
| 945 | } |