1 // Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
4 // **** This file must be preprocessed before compilation ****
6 // RULE: coordinates on non-static methods are ALWAYS relative to the
7 // upper-left hand corner of <tt>this</tt>
9 // FEATURE: reflow before allowing js to read from width/height
10 // FEATURE: fastpath for rows=1/cols=1
11 // FEATURE: reflow starting with a certain child
12 // FEATURE: separate mark_for_reflow and mark_for_resize
18 import org.xwt.util.*;
19 import org.xwt.translators.*;
23 * Encapsulates the data for a single XWT box as well as all layout
28 * This is the real meat of XWT. Part of its monolithic design is for
29 * performance reasons: deep inheritance heirarchies are slow, and
30 * neither javago nor GCJ can inline across class boundaries.
33 * <p>The rendering process consists of three phases; each requires
34 * one DFS pass over the tree</p>
36 * <ol><li> <b>repacking</b>: children of a box are packed into columns
37 * and rows according to their colspan/rowspan attributes and
38 * ordering. Minimum and maximum sizes of columns are computed.
40 * <li> <b>resizing</b>: width/height and x/y positions of children
41 * are assigned. If a PosChange or SizeChange is triggered,
42 * <tt>Surface.abort</tt> will be set and the resizing process will
45 * <li> <b>repainting</b>: children draw their content onto the
49 * The first two passes together are called the <i>reflow</i> phase.
51 * Reflowing is done in a seperate pass since PosChanges and
52 * SizeChanges trigger an Surface.abort; if rendering were done in the same
53 * pass, rendering work done prior to the Surface.abort would be wasted.
55 * The two passes are repack and resize. Together they are known as
56 * reflow. Repacking assigns boxes to the appropriate grid
57 * coordinates within the parents and computes
58 * contentwidth/contentheight. Resize computes actual size and
61 * A note on coordinates: the Box class represents regions
62 * internally as x,y,w,h tuples, even though the PixelBuffer class
63 * uses x1,y1,x2,y2 tuples.
65 public final class Box extends JS.Scope {
67 public Box() { super(null); }
70 // Misc instance data ////////////////////////////////////////////////////////////////
72 static int sizePosChangesSinceLastRender = 0;
75 // Misc instance data ////////////////////////////////////////////////////////////////
77 boolean needs_reflow = true;
78 //#define MARK_FOR_REFLOW_this for(Box b2 = this; b2 != null && !b2.needs_reflow; b2 = b2.parent) b2.needs_reflow = true;
79 //#define MARK_FOR_REFLOW_b for(Box b2 = b; b2 != null && !b2.needs_reflow; b2 = b2.parent) b2.needs_reflow = true;
80 //#define MARK_FOR_REFLOW_b_parent for(Box b2 = b.parent; b2 != null && !b2.needs_reflow; b2 = b2.parent) b2.needs_reflow = true;
83 Surface surface = null; // null on all non-root boxen
85 // Flags ///////////////////////////////////////////////////////////////////////////////
87 static int MOUSEINSIDE_FLAG = 0x00000001;
88 static int INVISIBLE_FLAG = 0x00000002;
89 static int ABSOLUTE_FLAG = 0x00000004;
90 static int HSHRINK_FLAG = 0x00000008;
91 static int VSHRINK_FLAG = 0x00000010;
92 static int TILE_FLAG = 0x00000020;
93 static int FONT_CHANGED_FLAG = 0x00000040; // set when font changes, cleared during repack
94 static int ISROOT_FLAG = 0x00000080;
95 static int NOCLIP_FLAG = 0x00000100;
98 // Geometry ////////////////////////////////////////////////////////////////////////////
100 // xwt can be compiled with 16-bit lengths to save memory on small devices
102 //#define MAX_LENGTH Integer.MAX_VALUE
103 //#define MIN_LENGTH Integer.MIN_VALUE
105 // always correct (set directly by user)
106 public LENGTH minwidth = 0;
107 public LENGTH minheight = 0;
108 public LENGTH maxwidth = MAX_LENGTH;
109 public LENGTH maxheight = MAX_LENGTH;
110 private LENGTH hpad = 0;
111 private LENGTH vpad = 0;
112 private String text = null;
113 private Res font = null;
114 private int fontsize = 10;
115 private LENGTH textwidth = 0;
116 private LENGTH textheight = 0;
118 // FEATURE: use shorts
119 private int rows = 1;
120 private int cols = 0;
121 private int rowspan = 1;
122 private int colspan = 1;
124 // computed during reflow
127 public LENGTH width = 0;
128 public LENGTH height = 0;
129 private int row = 0; // FEATURE use a short
130 private int col = 0; // FEATURE use a short
131 private LENGTH contentwidth = 0; // == max(minwidth, textwidth+pad, sum(child.contentwidth) + pad)
132 private LENGTH contentheight = 0;
135 // Rendering Properties ///////////////////////////////////////////////////////////
137 //private SVG.VP path = null;
138 //private SVG.Paint fill = null;
139 //private SVG.Paint stroke = null;
141 public Picture image; // will disappear
142 private int fillcolor = 0x00000000; // will become SVG.Paint
143 private int strokecolor = 0xFF000000; // will become SVG.Paint
145 private String cursor = null; // the cursor for this box
148 // Instance Methods /////////////////////////////////////////////////////////////////////
150 /** Adds the intersection of (x,y,w,h) and the node's current actual geometry to the Surface's dirty list */
151 public final void dirty() { dirty(0, 0, width, height); }
152 public final void dirty(int x, int y, int w, int h) {
153 for(Box cur = this; cur != null; cur = cur.parent) {
154 if ((flags & NOCLIP_FLAG) == 0) {
155 w = min(x + w, cur.width) - max(x, 0);
156 h = min(y + h, cur.height) - max(y, 0);
160 if (w <= 0 || h <= 0) return;
161 if (cur.parent == null && cur.surface != null) cur.surface.dirty(x, y, w, h);
168 * Given an old and new mouse position, this will update <tt>mouseinside</tt> and check
169 * to see if this node requires any Enter, Leave, or Move notifications.
171 * @param forceleave set to true by the box's parent if the mouse is inside an older
172 * sibling, which is covering up this box.
174 void Move(int oldmousex, int oldmousey, int mousex, int mousey) { Move(oldmousex, oldmousey, mousex, mousey, false); }
175 void Move(int oldmousex, int oldmousey, int mousex, int mousey, boolean forceleave) {
177 boolean wasinside = (flags & MOUSEINSIDE_FLAG) != 0;
178 boolean isinside = !((flags & INVISIBLE_FLAG) != 0) && inside(mousex, mousey) && !forceleave;
179 if (isinside) flags |= MOUSEINSIDE_FLAG; else flags &= ~MOUSEINSIDE_FLAG;
181 if (!wasinside && !isinside) return;
183 if (!wasinside && isinside && get("Enter", Trap.class) != null) put("Enter", Boolean.TRUE);
184 else if (wasinside && !isinside && get("Leave", Trap.class) != null) put("Leave", Boolean.TRUE);
185 else if (wasinside && isinside && (mousex != oldmousex || mousey != oldmousey) && get("Move", Trap.class) != null)
186 put("Move", Boolean.TRUE);
188 if (isinside && cursor != null) getRoot().cursor = cursor;
190 // if the mouse has moved into our padding region, it is considered 'outside' all our children
191 if (!(mousex >= hpad && mousey >= vpad && mousex < width - hpad && mousey < height + vpad)) forceleave = true;
193 for(Box b = getChild(numChildren() - 1); b != null; b = b.prevSibling()) {
194 b.Move(oldmousex - b.x, oldmousey - b.y, mousex - b.x, mousey - b.y, forceleave);
195 if (b.inside(mousex - b.x, mousey - b.y)) forceleave = true;
200 // Reflow ////////////////////////////////////////////////////////////////////////////////////////
202 void reflow() { reflow(width, height); }
203 void reflow(int new_width, int new_height) {
205 if (Surface.abort) return;
206 resize(x, y, new_width, new_height);
209 /** Checks if the Box's size has changed, dirties it if necessary, and makes sure childrens' sizes are up to date */
211 if (!needs_reflow) return;
212 if (numChildren() == 0) {
213 contentwidth = max(textwidth + 2 * hpad, minwidth);
214 contentheight = max(textheight + 2 * vpad, minheight);
218 // --- Phase 0 ----------------------------------------------------------------------
220 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
221 if (((flags & FONT_CHANGED_FLAG) != 0) && child.font == null) {
222 child.flags |= FONT_CHANGED_FLAG;
223 child.needs_reflow = true;
226 if (Surface.abort) { MARK_FOR_REFLOW_this; return; }
228 flags &= ~FONT_CHANGED_FLAG;
230 // --- Phase 1 ----------------------------------------------------------------------
231 // assign children to their row/column positions (assuming constrained columns)
232 if ((rows == 0 && cols == 0) || (rows != 0 && cols != 0)) throw new Error("rows == " + rows + " cols == " + cols);
233 //#repeat x/y y/x width/height col/row row/col cols/rows rows/cols colspan/rowspan rowspan/colspan colWidth/rowHeight numRowsInCol/numColsInRow INNER/INNER2 maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight OUTER/OUTER2 INNER/INNER2
235 int[] numRowsInCol = new int[cols]; // the number of cells occupied in each column
236 Box child = getChild(0);
237 for(; child != null && (((child.flags & ABSOLUTE_FLAG) != 0) || ((child.flags & INVISIBLE_FLAG) != 0)); child = child.nextSibling());
238 OUTER: for(int row=0; child != null; row++) {
239 for(int col=0; child != null && col < cols;) {
240 INNER: while(true) { // scan across the row, looking for an unoccupied gap at least as wide as the child
241 while(col < cols && numRowsInCol[col] > row) col++;
242 for(int i=col; i < cols && i < col + min(cols, child.colspan); i++)
243 if (numRowsInCol[col] > row) { col = i + 1; continue INNER; }
246 if (col + min(cols, child.colspan) > cols) break;
247 for(int i=col; i < col + min(cols, child.colspan); i++) numRowsInCol[i] += child.rowspan;
250 col += min(cols, child.colspan);
251 child = child.nextSibling();
252 for(; child != null && (((child.flags & ABSOLUTE_FLAG) != 0) || ((child.flags & INVISIBLE_FLAG) != 0)); child = child.nextSibling());
258 // --- Phase 2 ----------------------------------------------------------------------
259 // compute the min/max sizes of the columns and rows and set our contentwidth
260 //#repeat x/y y/x width/height col/row cols/rows colspan/rowspan colWidth/rowHeight maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight numCols/numRows hpad/vpad
261 contentwidth = 2 * hpad;
264 for(Box child = getChild(0); child != null; child = child.nextSibling())
265 numCols = max(numCols, child.col + child.colspan);
266 LENGTH[] colWidth = new LENGTH[numCols];
267 for(Box child = getChild(0); child != null; child = child.nextSibling())
268 if (!(((child.flags & ABSOLUTE_FLAG) != 0) || ((child.flags & INVISIBLE_FLAG) != 0)))
269 colWidth[child.col] = max(colWidth[child.col], child.contentwidth / child.colspan);
270 for(int col=0; col<numCols; col++) contentwidth += colWidth[col];
271 contentwidth = max(textwidth + 2 * hpad, contentwidth);
272 contentwidth = bound(minwidth, contentwidth, maxwidth);
277 private void resize(LENGTH x, LENGTH y, LENGTH width, LENGTH height) {
279 // --- Phase 1 ----------------------------------------------------------------------
280 // run PosChange/SizeChange, dirty as needed
281 if (x != this.x || y != this.y || width != this.width || height != this.height) {
282 (parent == null ? this : parent).dirty(this.x, this.y, this.width, this.height);
283 boolean sizechange = false, poschange = false;
284 if ((this.width != width || this.height != height) && get("SizeChange", Trap.class) != null) sizechange = true;
285 if ((this.x != x || this.y != y) && get("PosChange", Trap.class) != null) poschange = true;
286 this.width = width; this.height = height; this.x = x; this.y = y;
288 if (sizechange || poschange)
289 if (sizePosChangesSinceLastRender == 500) {
290 if (Log.on) Log.logJS(this, "Warning, more than 500 SizeChange/PosChange traps triggered since last complete render");
292 sizePosChangesSinceLastRender++;
293 try { if (sizechange) put("SizeChange", Boolean.TRUE); } catch (Exception e) { Log.log(this, e); }
294 try { if (poschange) put("PosChange", Boolean.TRUE); } catch (Exception e) { Log.log(this, e); }
295 Surface.abort = true;
301 // --- short circuit ----------------------------------------------------------------
302 if (!needs_reflow) return;
303 needs_reflow = false;
304 if (numChildren() == 0) return;
306 // --- Phase 2 ----------------------------------------------------------------------
307 // compute the min/max sizes of the columns and rows and set initial width/height to minimums
309 //#repeat x/y y/x width/height col/row cols/rows colspan/rowspan colWidth/rowHeight maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight marginWidth/marginHeight numCols/numRows
312 for(Box child = getChild(0); child != null; child = child.nextSibling())
313 numCols = max(numCols, child.col + child.colspan);
314 LENGTH[] colWidth = new LENGTH[numCols];
315 LENGTH[] colMaxWidth = new LENGTH[numCols];
316 int marginWidth = width;
317 for(int i=0; i<colMaxWidth.length; i++) colMaxWidth[i] = -1;
320 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
321 if (((child.flags & ABSOLUTE_FLAG) != 0) || ((child.flags & INVISIBLE_FLAG) != 0)) continue;
322 //#repeat x/y y/x width/height col/row cols/rows colspan/rowspan colWidth/rowHeight maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight HSHRINK_FLAG/VSHRINK_FLAG numCols/numRows
323 colWidth[child.col] = max(colWidth[child.col], child.contentwidth / child.colspan);
324 for(int i=child.col; i<child.col+child.colspan && i<numCols; i++)
325 colMaxWidth[i] = max(colMaxWidth[i], (((child.flags & HSHRINK_FLAG) != 0) ? child.contentwidth : child.maxwidth) / child.colspan);
329 //#repeat x/y y/x width/height col/row cols/rows colspan/rowspan colWidth/rowHeight maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight marginWidth/marginHeight
330 for(int i=0; i<colMaxWidth.length; i++) if (colMaxWidth[i] == -1) colMaxWidth[i] = MAX_LENGTH;
332 for(int i=0; i<colMaxWidth.length; i++) {
333 if (colMaxWidth[i] == MAX_LENGTH) { marginWidth = 0; break; }
334 marginWidth -= colMaxWidth[i];
335 if (marginWidth < 0) { marginWidth = 0; break; }
340 // --- Phase 3 ----------------------------------------------------------------------
341 // hand out the slack
343 //#repeat x/y y/x width/height col/row cols/rows colspan/rowspan colWidth/rowHeight maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight numCols/numRows hpad/vpad
344 slack = width - 2 * hpad;
345 for(int i=0; i<numCols; i++) slack -= colWidth[i];
346 if (numChildren() > 0)
348 // FEATURE: inefficient
349 int startslack = slack;
350 int increment = max(1, slack / numCols);
351 for(int col=0; col < numCols && slack > 0; col++) {
352 slack += colWidth[col];
353 colWidth[col] = min(colMaxWidth[col], colWidth[col] + increment);
354 slack -= colWidth[col];
356 if (slack == startslack) break;
361 // --- Phase 4 ----------------------------------------------------------------------
362 // assign children's new sizes and positions and recurse
363 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
364 if ((child.flags & INVISIBLE_FLAG) != 0) continue;
365 int child_x = 0, child_y = 0, child_width = 0, child_height = 0;
366 if ((child.flags & ABSOLUTE_FLAG) != 0) {
369 child_width = ((child.flags & HSHRINK_FLAG) != 0) ? child.contentwidth : min(child.maxwidth, width - child.x - hpad);
370 child_height = ((child.flags & VSHRINK_FLAG) != 0) ? child.contentheight : min(child.maxheight, height - child.y - vpad);
373 //#repeat x/y y/x width/height col/row cols/rows colspan/rowspan colWidth/rowHeight maxwidth/maxheight minwidth/minheight contentwidth/contentheight colMaxWidth/rowMaxHeight HSHRINK_FLAG/VSHRINK_FLAG marginWidth/marginHeight hpad/vpad child_x/child_y child_width/child_height
374 child_width = 0; for(int i=child.col; i<child.col+child.colspan && i<colWidth.length; i++) child_width += colWidth[i];
375 diff = bound(child.contentwidth, child_width, ((child.flags & HSHRINK_FLAG) != 0) ? child.contentwidth : child.maxwidth) - child_width;
376 child_x = max(hpad, marginWidth / 2); for(int i=0; i<child.col; i++) child_x += colWidth[i];
377 if (diff < 0) child_x += -1 * (diff / 2);
381 child.resize(child_x, child_y, child_width, child_height);
388 // Rendering Pipeline /////////////////////////////////////////////////////////////////////
390 /** Renders self and children within the specified region. All rendering operations are clipped to xIn,yIn,wIn,hIn */
391 void render(int parentx, int parenty, int clipx, int clipy, int clipw, int cliph, PixelBuffer buf) {
392 if (Surface.abort || (flags & INVISIBLE_FLAG) != 0) return;
393 int globalx = parentx + (parent == null ? 0 : x);
394 int globaly = parenty + (parent == null ? 0 : y);
396 // intersect the x,y,w,h rendering window with ourselves; quit if it's empty
397 if ((flags & NOCLIP_FLAG) == 0) {
398 clipw = min(max(clipx, parent == null ? 0 : globalx) + clipw, (parent == null ? 0 : globalx) + width) - globalx;
399 cliph = min(max(clipy, parent == null ? 0 : globaly) + cliph, (parent == null ? 0 : globaly) + height) - globaly;
400 clipx = max(clipx, parent == null ? 0 : globalx);
401 clipy = max(clipy, parent == null ? 0 : globaly);
403 if (clipw <= 0 || cliph <= 0) return;
405 if ((fillcolor & 0xFF000000) != 0x00000000)
406 buf.fillTrapezoid(clipx, clipx + clipw, clipy, clipx, clipx + clipw, clipy + cliph, fillcolor);
409 if ((flags & TILE_FLAG) != 0) renderTiledImage(globalx, globaly, clipx, clipy, clipw, cliph, buf);
410 else renderStretchedImage(globalx, globaly, clipx, clipy, clipw, cliph, buf);
412 if (text != null && !text.equals(""))
413 renderText(globalx, globaly, clipx, clipy, clipw, cliph, buf);
415 // now subtract the pad region from the clip region before proceeding
416 if ((flags & NOCLIP_FLAG) == 0) {
417 clipw = min(max(clipx, globalx + hpad) + clipw, globalx + width - hpad) - clipx;
418 cliph = min(max(clipy, globaly + vpad) + cliph, globaly + height - vpad) - clipy;
419 clipx = max(clipx, globalx + hpad);
420 clipy = max(clipy, globaly + vpad);
423 for(Box b = getChild(0); b != null; b = b.nextSibling())
424 b.render(globalx, globaly, clipx, clipy, clipw, cliph, buf);
427 void renderStretchedImage(int globalx, int globaly, int clipx, int clipy, int clipw, int cliph, PixelBuffer buf) {
429 buf.drawPicture(image, clipx, clipy, clipx + clipw, clipy + cliph, 0, 0, image.getWidth(), image.getHeight());
432 void renderTiledImage(int globalx, int globaly, int x, int y, int w, int h, PixelBuffer buf) {
433 int iw = image.getWidth();
434 int ih = image.getHeight();
435 for(int i=(x - x)/iw; i <= (x + w - x)/iw; i++) {
436 for(int j=(y - y)/ih; j<= (y + h - y)/ih; j++) {
438 int dx1 = max(i * iw + x, x);
439 int dy1 = max(j * ih + y, y);
440 int dx2 = min((i+1) * iw + x, x + w);
441 int dy2 = min((j+1) * ih + y, y + h);
443 int sx1 = dx1 - (i*iw) - x;
444 int sy1 = dy1 - (j*ih) - y;
445 int sx2 = dx2 - (i*iw) - x;
446 int sy2 = dy2 - (j*ih) - y;
448 if (dx2 - dx1 > 0 && dy2 - dy1 > 0 && sx2 - sx1 > 0 && sy2 - sy1 > 0)
449 buf.drawPicture(image, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2);
454 void renderText(int x, int y, int clipx, int clipy, int clipw, int cliph, PixelBuffer buf) {
455 for(int i=0; i<text.length(); i++) {
457 char c = text.charAt(i);
458 Glyph g = Glyph.getGlyph(font, fontsize, c);
461 y + vpad + g.max_ascent - g.baseline,
462 x + hpad + g.p.getWidth(),
463 y + vpad + g.max_ascent - g.baseline + g.p.getHeight(),
465 g.p.getWidth(), g.p.getHeight());
471 // Methods to implement org.xwt.js.JS //////////////////////////////////////
473 public Object callMethod(Object method, JS.Array args, boolean checkOnly) throws JS.Exn {
474 if ("indexof".equals(method)) {
475 if (checkOnly) return Boolean.TRUE;
476 if (args.length() != 1 || args.elementAt(0) == null || !(args.elementAt(0) instanceof Box)) return new Integer(-1);
477 Box b = (Box)args.elementAt(0);
478 if (b.parent != Box.this) {
479 if (redirect == null || redirect == Box.this) return new Integer(-1);
480 return redirect.callMethod(method, args, checkOnly);
482 return new Integer(b.getIndexInParent());
487 /** Returns the i_th child */
488 public Object get(int i) {
489 if (redirect == null) return null;
490 if (redirect != this) return redirect.get(i);
491 return i >= numChildren() || i < 0 ? null : getChild(i);
495 * Inserts value as child i; calls remove() if necessary.
496 * This method handles "reinserting" one of your children properly.
497 * INVARIANT: after completion, getChild(min(i, numChildren())) == newnode
498 * WARNING: O(n) runtime, unless i == numChildren()
500 public void put(int i, Object value) {
503 if (value != null && !(value instanceof Box)) {
504 if (Log.on) Log.logJS(this, "attempt to set a numerical property on a box to anything other than a box");
505 } else if (redirect == null) {
506 if (Log.on) Log.logJS(this, "attempt to add/remove children to/from a node with a null redirect");
507 } else if (redirect != this) {
508 Box b = value == null ? (Box)redirect.get(i) : (Box)value;
509 redirect.put(i, value);
511 } else if (value == null) {
512 if (i >= 0 && i < numChildren()) {
518 Box newnode = (Box)value;
520 // check if box being moved is currently target of a redirect
521 for(Box cur = newnode.parent; cur != null; cur = cur.parent)
522 if (cur.redirect == newnode) {
523 if (Log.on) Log.logJS(this, "attempt to move a box that is the target of a redirect");
527 // check for recursive ancestor violation
528 for(Box cur = this; cur != null; cur = cur.parent)
529 if (cur == newnode) {
530 if (Log.on) Log.logJS(this, "attempt to make a node a parent of its own ancestor");
531 if (Log.on) Log.log(this, "box == " + this + " ancestor == " + newnode);
535 if (numKids > 15 && children == null) convert_to_array();
537 newnode.parent = this;
539 if (children == null) {
540 if (firstKid == null) {
542 newnode.prevSibling = newnode;
543 newnode.nextSibling = newnode;
544 } else if (i >= numKids) {
545 newnode.prevSibling = firstKid.prevSibling;
546 newnode.nextSibling = firstKid;
547 firstKid.prevSibling.nextSibling = newnode;
548 firstKid.prevSibling = newnode;
551 for(int j=0; j<i; j++) cur = cur.nextSibling;
552 newnode.prevSibling = cur.prevSibling;
553 newnode.nextSibling = cur;
554 cur.prevSibling.nextSibling = newnode;
555 cur.prevSibling = newnode;
556 if (i == 0) firstKid = newnode;
561 if (i >= children.size()) {
562 newnode.indexInParent = children.size();
563 children.addElement(newnode);
565 children.insertElementAt(newnode, i);
566 for(int j=i; j<children.size(); j++)
567 getChild(j).indexInParent = j;
571 // need both of these in case child was already uncalc'ed
574 MARK_FOR_REFLOW_this;
578 // note that JavaScript box[0] will invoke put(int i), not put(String s)
583 public Object get(Object key, Object key2) { return super.get(key, key2); }
584 public void put(Object key, Object key2, Object val) { super.put(key, key2, val); }
586 public Object get_(Object name) { return super.get(name); }
587 public Object get(Object name) { return get(name, false); }
588 public Object get(Object name_, boolean ignoretraps) {
589 if (name_ instanceof Number) return get(((Number)name_).intValue());
591 if (!(name_ instanceof String)) return null;
592 String name = (String)name_;
593 if (name.equals("")) return null;
595 // See if we're triggering a trap
596 Trap t = ignoretraps ? (Trap)null : (Trap)get(name, Trap.class);
597 if (t != null) return t.perform();
599 // Check for a special handler
600 SpecialBoxProperty gph = (SpecialBoxProperty)SpecialBoxProperty.specialBoxProperties.get(name);
601 if (gph != null) return gph.get(this);
603 Object ret = super.get(name);
604 if (name.startsWith("$") && ret == null)
605 if (Log.on) Log.logJS(this, "WARNING: attempt to access " + name + ", but no child with id=\"" +
606 name.substring(1) + "\" found");
610 public Object[] keys() {
611 Object[] ret = new Object[numChildren()];
612 for(int i=0; i<ret.length; i++) ret[i] = new Integer(i);
616 public void addTrap(Object name, Object value) { Trap.addTrap(this, name, ((JS.CompiledFunction)value)); }
617 public void delTrap(Object name, Object value) { Trap.delTrap(this, name, ((JS.CompiledFunction)value)); }
622 * @param ignoretraps if set, no traps will be triggered (set when 'cascade' reaches the bottom of the trap stack)
623 * @param rp if this put is being performed via a root proxy, rp is the root proxy.
625 public void put_(Object name, Object value) { super.put(name, value); }
626 public void put(Object name, Object value) { put(name, value, false); }
627 public void put(Object name_, Object value, boolean ignoretraps) {
628 if (name_ instanceof Number) { put(((Number)name_).intValue(), value); return; }
629 if (!(name_ instanceof String)) { super.put(name_,value); return; }
630 String name = name_.toString();
632 Trap t = (Trap)get(name, Trap.class);
639 // don't want to really cascade down to the box on this one
640 if (name.equals("0")) return;
642 SpecialBoxProperty gph = (SpecialBoxProperty)SpecialBoxProperty.specialBoxProperties.get(name);
643 if (gph != null) { gph.put(name, this, value); return; }
645 super.put(name, value);
649 // Tree Manipulation /////////////////////////////////////////////////////////////////////
651 /** The parent of this node */
652 private Box parent = null;
654 // Variables used in Vector mode */
655 /** INVARIANT: if (parent != null) parent.children.elementAt(indexInParent) == this */
656 private int indexInParent;
657 private Vec children = null;
659 // Variables used in linked-list mode
660 private int numKids = 0;
661 private Box nextSibling = null;
662 private Box prevSibling = null;
663 private Box firstKid = null;
665 // when we get more than 15 children, we switch to array-mode
666 private void convert_to_array() {
667 children = new Vec(numKids);
670 children.addElement(cur);
671 cur.indexInParent = children.size() - 1;
672 cur = cur.nextSibling;
673 } while (cur != firstKid);
676 /** remove this node from its parent; INVARIANT: whenever the parent of a node is changed, remove() gets called. */
677 public void remove() {
678 if (parent == null) {
679 if (surface != null) surface.dispose(true);
682 Box oldparent = parent;
683 if (oldparent == null) return;
684 MARK_FOR_REFLOW_this;
686 flags &= ~MOUSEINSIDE_FLAG;
688 if (parent.children != null) {
689 parent.children.removeElementAt(indexInParent);
690 for(int j=indexInParent; j<parent.children.size(); j++)
691 (parent.getChild(j)).indexInParent = j;
694 if (parent.firstKid == this) {
695 if (nextSibling == this) parent.firstKid = null;
696 else parent.firstKid = nextSibling;
699 prevSibling.nextSibling = nextSibling;
700 nextSibling.prevSibling = prevSibling;
706 if (oldparent != null) { Box b = oldparent; MARK_FOR_REFLOW_b; }
708 // note that JavaScript box[0] will invoke put(int i), not put(String s)
709 if (oldparent != null) oldparent.put("0", this);
712 /** returns our next sibling (parent[ourindex + 1]) */
713 public final Box nextSibling() {
714 if (parent == null) return null;
715 if (parent.children == null) {
716 if (nextSibling == parent.firstKid) return null;
719 if (indexInParent >= parent.children.size() - 1) return null;
720 return (Box)parent.children.elementAt(indexInParent + 1);
724 /** returns our next sibling (parent[ourindex + 1]) */
725 public final Box prevSibling() {
726 if (parent == null) return null;
727 if (parent.children == null) {
728 if (this == parent.firstKid) return null;
731 if (indexInParent == 0) return null;
732 return (Box)parent.children.elementAt(indexInParent - 1);
736 /** Returns the parent of this node */
737 public Box getParent() { return parent; }
739 /** Returns ith child */
740 public Box getChild(int i) {
741 if (children == null) {
742 if (firstKid == null) return null;
743 if (i >= numKids) return null;
744 if (i == numKids - 1) return firstKid.prevSibling;
746 for(int j=0; j<i; j++) cur = cur.nextSibling;
749 if (i >= children.size() || i < 0) return null;
750 return (Box)children.elementAt(i);
754 /** Returns the number of children */
755 public int numChildren() {
756 if (children == null) {
757 if (firstKid == null) return 0;
759 for(Box cur = firstKid.nextSibling; cur != firstKid; i++) cur = cur.nextSibling;
762 return children.size();
766 /** Returns our index in our parent */
767 public int getIndexInParent() {
768 if (parent == null) return 0;
769 if (parent.children == null) {
771 for(Box cur = this; cur != parent.firstKid; i++) cur = cur.prevSibling;
774 return indexInParent;
778 /** returns the root of the surface that this box belongs to */
779 public final Box getRoot() {
780 if (parent == null && surface != null) return this;
781 if (parent == null) return null;
782 return parent.getRoot();
786 // Trivial Helper Methods (should be inlined) /////////////////////////////////////////
788 static final int min(int a, int b) { if (a<b) return a; else return b; }
789 static final double min(double a, double b) { if (a<b) return a; else return b; }
790 static final int max(int a, int b) { if (a>b) return a; else return b; }
791 static final int min(int a, int b, int c) { if (a<=b && a<=c) return a; else if (b<=c && b<=a) return b; else return c; }
792 static final int max(int a, int b, int c) { if (a>=b && a>=c) return a; else if (b>=c && b>=a) return b; else return c; }
793 static final int bound(int a, int b, int c) { if (c < b) return c; if (a > b) return a; return b; }
794 final boolean inside(int x, int y) { return (!((flags & INVISIBLE_FLAG) != 0) && x >= 0 && y >= 0 && x < width && y < height); }
796 /** figures out what box in this subtree of the Box owns the pixel at x,y relitave to the Surface */
797 public static Box whoIs(Box cur, int x, int y) {
799 if (cur.parent != null) throw new Error("whoIs may only be invoked on the root box of a surface");
803 // WARNING: this method is called from the event-queueing
804 // thread -- it may run concurrently with ANY part of XWT, and
805 // is UNSYNCHRONIZED for performance reasons. BE CAREFUL
808 if ((cur.flags & INVISIBLE_FLAG) != 0) return null;
809 if (!cur.inside(x - globalx, y - globaly)) return cur.parent == null ? cur : null;
811 for(int i=cur.numChildren() - 1; i>=0; i--) {
812 Box child = cur.getChild(i);
813 if (child == null) continue; // since this method is unsynchronized, we have to double-check
816 if (!((child.flags & INVISIBLE_FLAG) != 0) && child.inside(x - globalx, y - globaly)) { cur = child; continue OUTER; }
826 * A helper class for properties of Box which require special
829 * To avoid excessive use of String.equals(), the Box.get() and
830 * Box.put() methods employ a Hash keyed on property names that
831 * require special handling. The value stored in the Hash is an
832 * instance of an anonymous subclass of SpecialBoxProperty, which knows
833 * how to handle get()s and put()s for that property name. There
834 * should be one anonymous subclass of SpecialBoxProperty for each
835 * specially-handled property on Box.
837 static class SpecialBoxProperty {
839 SpecialBoxProperty() { }
841 /** stores instances of SpecialBoxProperty; keyed on property name */
842 static Hash specialBoxProperties = new Hash(200, 3);
844 /** this method defines the behavior when the property is get()ed from b */
845 Object get(Box b) { return null; }
847 /** this method defines the behavior when the property is put() to b */
848 void put(Box b, Object value) { }
850 /** this method defines the behavior when the property is put() to b, allows a single SpecialBoxProperty to serve multiple properties */
851 void put(String name, Box b, Object value) { put(b, value); }
854 //#repeat fillcolor/strokecolor
855 specialBoxProperties.put("fillcolor", new SpecialBoxProperty() {
856 public Object get(Box b) {
857 if ((b.fillcolor & 0xFF000000) == 0) return null;
858 String red = Integer.toHexString((b.fillcolor & 0x00FF0000) >> 16);
859 String green = Integer.toHexString((b.fillcolor & 0x0000FF00) >> 8);
860 String blue = Integer.toHexString(b.fillcolor & 0x000000FF);
861 if (red.length() < 2) red = "0" + red;
862 if (blue.length() < 2) blue = "0" + blue;
863 if (green.length() < 2) green = "0" + green;
864 return "#" + red + green + blue;
866 public void put(Box b, Object value) {
867 int newcolor = b.fillcolor;
868 String s = value == null ? null : value.toString();
869 if (value == null) newcolor = 0x00000000;
870 else if (s.length() > 0 && s.charAt(0) == '#')
872 newcolor = 0xFF000000 |
873 (Integer.parseInt(s.substring(1, 3), 16) << 16) |
874 (Integer.parseInt(s.substring(3, 5), 16) << 8) |
875 Integer.parseInt(s.substring(5, 7), 16);
876 } catch (NumberFormatException e) {
877 Log.log(this, "invalid color " + s);
880 else if (org.xwt.translators.SVG.colors.get(s) != null)
881 newcolor = 0xFF000000 | ((Integer)org.xwt.translators.SVG.colors.get(s)).intValue();
882 if (newcolor == b.fillcolor) return;
883 b.fillcolor = newcolor;
889 specialBoxProperties.put("color", new SpecialBoxProperty() {
890 public Object get(Box b) { return b.get("fillcolor"); }
891 public void put(Box b, Object value) { b.put("fillcolor", value); }
894 specialBoxProperties.put("textcolor", new SpecialBoxProperty() {
895 public Object get(Box b) { return b.get("strokecolor"); }
896 public void put(Box b, Object value) { b.put("strokecolor", value); }
899 specialBoxProperties.put("text", new SpecialBoxProperty() {
900 public Object get(Box b) { return b.text; }
901 public void put(Box b, Object value) {
902 String t = value == null ? "null" : value.toString();
903 if (t.equals(b.text)) return;
906 if (b.textwidth != 0 || b.textheight != 0) MARK_FOR_REFLOW_b;
907 b.textwidth = b.textheight = 0;
912 for(int i=0; i<b.text.length(); i++) {
913 Glyph g = Glyph.getGlyph(b.font, b.fontsize, b.text.charAt(i));
914 b.textwidth += g.advance;
915 b.textheight = g.max_ascent + g.max_descent;
917 } catch (Exception e) {
924 specialBoxProperties.put("font", new SpecialBoxProperty() {
925 public Object get(Box b) { return b.font; }
926 public void put(Box b, Object value) {
927 // FIXME: translate value into a resource if it is a string
928 b.font = value == null ? null : (Res)value;
930 b.flags |= FONT_CHANGED_FLAG;
934 specialBoxProperties.put("fontsize", new SpecialBoxProperty() {
935 public Object get(Box b) { return b.font; }
936 public void put(Box b, Object value) {
937 if (b.fontsize == stoi(value)) return;
938 b.fontsize = stoi(value);
940 b.flags |= FONT_CHANGED_FLAG;
944 specialBoxProperties.put("thisbox", new SpecialBoxProperty() {
945 public Object get(Box b) { return b; }
946 public void put(Box b, Object value) {
947 if (value == null) b.remove();
948 else if (value.equals("window") || value.equals("frame")) Platform.createSurface(b, value.equals("frame"), true);
949 else if (Log.on) Log.log(this, "put invalid value to 'thisbox' property: " + value);
953 specialBoxProperties.put("orient", new SpecialBoxProperty() {
954 public Object get(Box b) {
955 Log.log(this, "warning: the orient property is deprecated");
956 if (b.redirect == null) return "horizontal";
957 else if (b.redirect != b) return get(b.redirect);
958 else if (b.cols == 1) return "vertical";
959 else if (b.rows == 1) return "horizontal";
962 public void put(Box b, Object value) {
963 Log.log(this, "warning: the orient property is deprecated");
964 if (value == null) return;
965 if (b.redirect == null) return;
966 if (b.redirect != b) { put(b.redirect, value); return; }
967 if (value.equals("vertical")) {
968 if (b.rows == 0) return;
969 b.rows = 0; b.cols = 1;
970 } else if (value.equals("horizontal")) {
971 if (b.cols == 0) return;
972 b.cols = 0; b.rows = 1;
974 Log.log(this, "invalid value put to orient property: " + value);
979 specialBoxProperties.put("static", new SpecialBoxProperty() {
982 specialBoxProperties.put("shrink", new SpecialBoxProperty() {
983 public Object get(Box b) { return (((b.flags & HSHRINK_FLAG) != 0) || ((b.flags & VSHRINK_FLAG) != 0)) ? Boolean.TRUE : Boolean.FALSE; }
984 public void put(Box b, Object value) { b.put("hshrink", value); b.put("vshrink", value); }
987 //#repeat hshrink/vshrink HSHRINK_FLAG/VSHRINK_FLAG
988 specialBoxProperties.put("hshrink", new SpecialBoxProperty() {
989 public Object get(Box b) { return new Boolean((b.flags & HSHRINK_FLAG) != 0); }
990 public void put(Box b, Object value) {
991 boolean newshrink = stob(value);
992 if (((b.flags & HSHRINK_FLAG) != 0) == newshrink) return;
993 if (newshrink) b.flags |= HSHRINK_FLAG; else b.flags &= ~HSHRINK_FLAG;
1000 specialBoxProperties.put("x", new SpecialBoxProperty() {
1001 public Object get(Box b) {
1002 if (b.surface == null) return new Integer(0);
1003 if ((b.flags & INVISIBLE_FLAG) != 0) return new Integer(0);
1004 return new Integer(b.x);
1006 public void put(Box b, Object value) {
1007 if (!((b.flags & ABSOLUTE_FLAG) != 0)) return;
1008 int x = stoi(value);
1009 if (x == b.x) return;
1012 if (b.parent == null && b.surface != null) b.surface.setLocation();
1019 //#repeat width/height minwidth/minheight maxwidth/maxheight
1020 specialBoxProperties.put("width", new SpecialBoxProperty() {
1021 public Object get(Box b) { return new Integer(b.width); }
1022 public void put(Box b, Object value) {
1023 b.width = stoi(value);
1024 if (b.parent == null && b.surface != null) {
1025 b.surface.setSize();
1028 if (b.minwidth == b.width && b.maxwidth == b.width) return;
1029 b.minwidth = b.maxwidth = b.width;
1035 //#repeat cols/rows rows/cols
1036 specialBoxProperties.put("cols", new SpecialBoxProperty() {
1037 public Object get(Box b) { return new Double(b.cols); }
1038 public void put(Box b, Object value) {
1039 if (b.cols == stoi(value)) return;
1040 b.cols = stoi(value);
1041 if (b.cols == 0 && b.rows == 0) b.rows = 1;
1042 if (b.cols != 0 && b.rows != 0) b.rows = 0;
1047 //#repeat colspan/rowspan
1048 specialBoxProperties.put("colspan", new SpecialBoxProperty() {
1049 public Object get(Box b) { return new Double(b.colspan); }
1050 public void put(Box b, Object value) {
1051 if (b.colspan == stoi(value)) return;
1052 b.colspan = stoi(value);
1058 specialBoxProperties.put("tile", new SpecialBoxProperty() {
1059 public Object get(Box b) { return ((b.flags & TILE_FLAG) != 0) ? Boolean.TRUE : Boolean.FALSE; }
1060 public void put(Box b, Object value) {
1061 if (((b.flags & TILE_FLAG) != 0) == stob(value)) return;
1062 if (stob(value)) b.flags |= TILE_FLAG; else b.flags &= ~TILE_FLAG;
1066 specialBoxProperties.put("noclip", new SpecialBoxProperty() {
1067 public Object get(Box b) { return ((b.flags & NOCLIP_FLAG) != 0) ? Boolean.TRUE : Boolean.FALSE; }
1068 public void put(Box b, Object value) {
1069 if (((b.flags & NOCLIP_FLAG) != 0) == stob(value)) return;
1070 if (stob(value)) b.flags |= NOCLIP_FLAG; else b.flags &= ~NOCLIP_FLAG;
1075 specialBoxProperties.put("invisible", new SpecialBoxProperty() {
1076 public Object get(Box b) {
1077 for (Box cur = b; cur != null; cur = cur.parent) {
1078 if ((cur.flags & INVISIBLE_FLAG) != 0) return Boolean.TRUE; }
1079 return Boolean.FALSE;
1081 public void put(Box b, Object value) {
1082 if (stob(value) == ((b.flags & INVISIBLE_FLAG) != 0)) return;
1083 if (stob(value)) b.flags |= INVISIBLE_FLAG; else b.flags &= ~INVISIBLE_FLAG;
1084 if (b.parent == null) {
1085 if (b.surface != null) b.surface.setInvisible((b.flags & INVISIBLE_FLAG) != 0);
1088 MARK_FOR_REFLOW_b_parent;
1089 b.parent.dirty(b.x, b.y, b.width, b.height);
1093 specialBoxProperties.put("absolute", new SpecialBoxProperty() {
1094 public Object get(Box b) { return ((b.flags & ABSOLUTE_FLAG) != 0) ? Boolean.TRUE : Boolean.FALSE; }
1095 public void put(Box b, Object value) {
1096 if (stob(value) == ((b.flags & ABSOLUTE_FLAG) != 0)) return;
1097 if (stob(value)) b.flags |= ABSOLUTE_FLAG; else b.flags &= ~ABSOLUTE_FLAG;
1098 if ((b.flags & ABSOLUTE_FLAG) != 0) { b.x = 0; b.y = 0; }
1099 if (b.parent != null) MARK_FOR_REFLOW_b_parent;
1102 specialBoxProperties.put("image", new SpecialBoxProperty() {
1104 public Object get(Box b) { return b.image == null ? null : ImageDecoder.imageToNameMap.get(b.image); }
1106 public void put(Box b, Object value) {
1107 //if (image != null) System.out.println("hit");
1108 if (value == null) {
1110 } else if (value instanceof Res) {
1111 b.image = Picture.fromRes((Res)value);
1115 b.minwidth = min(b.maxwidth, max(b.minwidth, b.image == null ? 0 : b.image.getWidth()));
1116 b.minheight = min(b.maxheight, max(b.minheight, b.image == null ? 0 : b.image.getHeight()));
1122 //#repeat globalx/globaly x/y
1123 specialBoxProperties.put("globalx", new SpecialBoxProperty() {
1124 public Object get(Box b) { return new Integer(b.parent == null || b.surface == null ? 0 : b.x); }
1125 public void put(Box b, Object value) {
1126 if (b.surface == null || b.parent == null) return;
1127 b.put("x", new Integer(stoi(value) - stoi(get(b.parent))));
1133 specialBoxProperties.put("cursor", new SpecialBoxProperty() {
1134 public Object get(Box b) { return b.cursor; }
1135 public void put(Box b, Object value) {
1136 b.cursor = (String)value;
1137 if (b.surface == null) return;
1139 // see if we need to update the surface cursor
1140 Surface surface = b.getRoot().surface;
1141 String tempcursor = surface.cursor;
1142 b.Move(surface.mousex, surface.mousey, surface.mousex, surface.mousey);
1143 if (surface.cursor != tempcursor) surface.syncCursor();
1147 //#repeat mousex/mousey x/y
1148 specialBoxProperties.put("mousex", new SpecialBoxProperty() {
1149 public Object get(Box b) {
1150 Surface surface = b.getRoot().surface;
1151 if (surface == null) return new Integer(0);
1152 int mousex = surface.mousex;
1153 for(Box cur = b; cur != null && cur.parent != null; cur = cur.parent) mousex -= cur.x;
1154 return new Integer(mousex);
1159 specialBoxProperties.put("mouseinside", new SpecialBoxProperty() {
1160 public Object get(Box b) {
1161 return ((b.flags & MOUSEINSIDE_FLAG) != 0) ? Boolean.TRUE : Boolean.FALSE; }
1164 specialBoxProperties.put("numchildren", new SpecialBoxProperty() {
1165 public Object get(Box b) {
1166 if (b.redirect == null) return new Integer(0);
1167 if (b.redirect != b) return get(b.redirect);
1168 return new Integer(b.numChildren());
1171 SpecialBoxProperty mouseEventHandler = new SpecialBoxProperty() {
1172 public void put(String name, Box b, Object value) {
1173 Surface surface = b.getRoot().surface;
1174 if (surface == null) return;
1175 int mousex = surface.mousex;
1176 int mousey = surface.mousey;
1177 for(Box c = b.parent; c != null && c.parent != null; c = c.parent) {
1181 for(Box c = b.prevSibling(); c != null; c = c.prevSibling()) {
1182 if (c.inside(mousex - c.x, mousey - c.y)) {
1187 if (b.parent != null) b.parent.put(name, value);
1190 specialBoxProperties.put("Press1", mouseEventHandler);
1191 specialBoxProperties.put("Press2", mouseEventHandler);
1192 specialBoxProperties.put("Press3", mouseEventHandler);
1193 specialBoxProperties.put("Release1", mouseEventHandler);
1194 specialBoxProperties.put("Release2", mouseEventHandler);
1195 specialBoxProperties.put("Release3", mouseEventHandler);
1196 specialBoxProperties.put("Click1", mouseEventHandler);
1197 specialBoxProperties.put("Click2", mouseEventHandler);
1198 specialBoxProperties.put("Click3", mouseEventHandler);
1199 specialBoxProperties.put("DoubleClick1", mouseEventHandler);
1200 specialBoxProperties.put("DoubleClick2", mouseEventHandler);
1201 specialBoxProperties.put("DoubleClick3", mouseEventHandler);
1203 specialBoxProperties.put("root", new SpecialBoxProperty() {
1204 public void put(Box b, Object value) {
1205 if (stob(value)) b.flags |= ISROOT_FLAG;
1206 else b.flags &= ~ISROOT_FLAG;
1208 public Object get(Box b) {
1209 if (b.parent == null || ((b.flags & ISROOT_FLAG) != 0)) return b;
1210 else return get(b.parent);
1213 specialBoxProperties.put("Minimized", new SpecialBoxProperty() {
1214 public Object get(Box b) {
1215 if (b.parent == null && b.surface != null) return b.surface.minimized ? Boolean.TRUE : Boolean.FALSE;
1218 public void put(Box b, Object value) {
1219 if (b.surface == null) return;
1220 boolean val = stob(value);
1221 if (b.parent == null && b.surface.minimized != val) b.surface.setMinimized(val);
1225 specialBoxProperties.put("Maximized", new SpecialBoxProperty() {
1226 public Object get(Box b) {
1227 if (b.parent == null && b.surface != null) return b.surface.maximized ? Boolean.TRUE : Boolean.FALSE;
1230 public void put(Box b, Object value) {
1231 if (b.surface == null) return;
1232 boolean val = stob(value);
1233 if (b.parent == null && b.surface.maximized != val) b.surface.setMaximized(val);
1237 specialBoxProperties.put("toback", new SpecialBoxProperty() {
1238 public void put(Box b, Object value) {
1239 if (b.parent == null && stob(value) && b.surface != null) b.surface.toBack();
1243 specialBoxProperties.put("tofront", new SpecialBoxProperty() {
1244 public void put(Box b, Object value) {
1245 if (b.parent == null && stob(value) && b.surface != null) b.surface.toFront();
1249 specialBoxProperties.put("Close", new SpecialBoxProperty() {
1250 public void put(Box b, Object value) {
1251 if (b.parent == null && b.surface != null) b.surface.dispose(true);
1255 // these are all do-nothings; just to prevent space from getting taken up in the params Hash.
1256 specialBoxProperties.put("KeyPressed", new SpecialBoxProperty());
1257 specialBoxProperties.put("KeyReleased", new SpecialBoxProperty());
1258 specialBoxProperties.put("PosChange", new SpecialBoxProperty());
1259 specialBoxProperties.put("SizeChange", new SpecialBoxProperty());
1262 specialBoxProperties.put("hpad", new SpecialBoxProperty() {
1263 public Object get(Box b) {
1264 if (b.redirect == null) return new Integer(0);
1265 if (b.redirect != b) return get(b.redirect);
1266 return new Integer(b.hpad);
1268 public void put(Box b, Object value) {
1269 if (b.redirect == null) return;
1270 if (b.redirect != b) { put(b.redirect, value); return; }
1271 int newval = stoi(value);
1272 if (newval == b.hpad) return;
1279 //#repeat minwidth/minheight maxwidth/maxheight
1280 specialBoxProperties.put("minwidth", new SpecialBoxProperty() {
1281 public Object get(Box b) { return new Integer(b.minwidth); }
1282 public void put(Box b, Object value) {
1283 if (stoi(value) == b.minwidth) return;
1284 b.minwidth = stoi(value);
1288 specialBoxProperties.put("maxwidth", new SpecialBoxProperty() {
1289 public Object get(Box b) { return new Integer(b.maxwidth); }
1290 public void put(Box b, Object value) {
1291 if (stoi(value) == b.maxwidth) return;
1292 b.maxwidth = stoi(value);
1298 specialBoxProperties.put("redirect", new SpecialBoxProperty() {
1299 public void put(Box b, Object value) {
1300 if (b.redirect != b) Log.log(this, "cannot change the redirect of a box once it is set");
1301 else if (value == null) b.redirect = null;
1303 Box b2 = (Box)value;
1304 while(b2 != b && b2 != null) b2 = b2.parent;
1305 if (b2 == null) Log.log(this, "a box's redirect must be one of its descendants");
1306 b.redirect = (Box)value;
1309 public Object get(Box b) {
1310 if (b.redirect == null) return null;
1311 if (b.redirect == b) return Boolean.TRUE;
1312 return get(b.redirect);
1316 // FEATURE: this still isn't totally harmonious; when you createSurface, these aren't checked
1317 specialBoxProperties.put("titlebar", new SpecialBoxProperty() {
1318 public void put(Box b, Object value) {
1319 if (b.surface != null) b.surface.setTitleBarText(value.toString());
1320 b.put_("titlebar", value);
1322 public Object get(Box b) { return b.get_("titlebar"); }
1325 specialBoxProperties.put("icon", new SpecialBoxProperty() {
1328 public void put(Box b, Object value) {
1329 b.put_("icon", value);
1330 if (b.surface == null) return;
1331 Picture pic = ImageDecoder.getPicture(value.toString());
1332 if (pic != null) b.surface.setIcon(pic);
1333 else if (Log.on) Log.log(this, "unable to load icon " + value);
1335 public Object get(Box b) { return b.get_("icon"); }
1341 /** helper that converts a String to a boolean according to JavaScript coercion rules */
1342 public static boolean stob(Object o) {
1343 if (o == null) return false;
1344 return Boolean.TRUE.equals(o) || "true".equals(o);
1347 /** helper that converts a String to an int according to JavaScript coercion rules */
1348 public static int stoi(Object o) {
1349 if (o == null) return 0;
1350 if (o instanceof Integer) return ((Integer)o).intValue();
1353 if (!(o instanceof String)) s = o.toString();
1356 try { return Integer.parseInt(s.indexOf('.') == -1 ? s : s.substring(0, s.indexOf('.'))); }
1357 catch (NumberFormatException e) { return 0; }