1 // Copyright 2000-2005 the Contributors, as shown in the revision logs.
2 // Licensed under the GNU General Public License version 2 ("the License").
3 // You may not use this file except in compliance with the License.
7 // FIXME: are traps on x/y meaningful?
8 // FIXME: trap on visible, trigger when parent visibility changes
9 // FIXME: mouse move/release still needs to propagate to boxen in which the mouse was pressed and is still held down
10 // FEATURE: reintroduce surface.abort
15 // - clipping (all forms)
19 import org.ibex.util.*;
20 import org.ibex.plat.*;
21 import org.ibex.graphics.*;
25 * Encapsulates the data for a single Ibex box as well as all layout
29 * <p>The rendering process consists of four phases; each requires
30 * one DFS pass over the tree</p>
31 * <ol><li> <b>pack()</b>: each box sets its childrens' row/col
32 * <ol><li> <b>constrain()</b>: contentwidth is computed
33 * <li> <b>resize()</b>: width/height and x/y positions are set
34 * <li> <b>render()</b>: children draw their content onto the PixelBuffer.
37 * The first three passes together are called the <i>reflow</i>
38 * phase. Reflowing is done in a seperate pass since SizeChanges
39 * trigger a Surface.abort; if rendering were done in the same pass,
40 * rendering work done prior to the Surface.abort would be wasted.
42 public final class Box extends JS.Obj implements Callable, Mesh.Chain {
44 public Mesh.Chain getMeshChainParent() { return parent; }
45 public Mesh getMesh() { return mesh; }
46 public Affine getAffine() { return transform; }
48 // Macros //////////////////////////////////////////////////////////////////////
50 final void REPLACE() { for(Box b2 = this; b2 != null && !b2.test(REPLACE); b2 = b2.parent) b2.set(REPLACE); }
51 final void RECONSTRAIN() { for(Box b2 = this; b2 != null && !b2.test(RECONSTRAIN); b2 = b2.parent) b2.set(RECONSTRAIN); }
53 //#define CHECKSET_SHORT(prop) short nu = (short)JSU.toInt(value); if (nu == prop) break; prop = nu;
54 //#define CHECKSET_INT(prop) int nu = JSU.toInt(value); if (nu == prop) break; prop = nu;
55 //#define CHECKSET_FLAG(flag) boolean nu=JSU.toBoolean(value);if(nu == test(flag)) break; if (nu) set(flag); else clear(flag);
56 //#define CHECKSET_BOOLEAN.N(prop) boolean nu = JSU.toBoolean(value); if (nu == prop) break; prop = nu;
57 //#define CHECKSET_STRING(prop) if((value==null&&prop==null)||(value!=null&&JSU.toString(value).equals(prop)))break;prop=JSU.toString(value);
59 // Instance Data //////////////////////////////////////////////////////////////////////
61 private Box parent = null;
62 private Box redirect = this;
63 private int flags = VISIBLE | RECONSTRAIN | REPLACE | STOP_UPWARD_PROPAGATION | CLIP | MOVED;
64 private BalancedTree bt = null;
65 private String text = null;
66 private Font font = DEFAULT_FONT;
67 private Picture texture = null;
68 public int fillcolor = 0x00000000;
69 private int strokecolor = 0xFF000000;
70 public float flex = 1;
71 private Path path = null;
72 private Path clippath = null;
73 private Affine transform = Affine.identity();
75 // FEATURE: polygon caching
76 private Mesh polygon = null;
77 private Mesh mesh = null;
79 // specified directly by user
80 public int minwidth = 0;
81 public int maxwidth = Integer.MAX_VALUE;
82 public int minheight = 0;
83 public int maxheight = Integer.MAX_VALUE;
85 // computed during reflow
87 public int height = 0;
88 public int contentwidth = 0; // == max(minwidth, textwidth, sum(child.contentwidth))
89 public int contentheight = 0;
92 // Instance Methods /////////////////////////////////////////////////////////////////////
94 /** invoked when a resource needed to render ourselves finishes loading */
95 public Object run(Object o) throws JSExn {
96 if (texture == null) { Log.warn(Box.class, "perform() called with null texture"); return null; }
97 if (texture.isLoaded) {
98 setWidth(max(texture.width, minwidth), maxwidth);
99 setHeight(max(texture.height, minheight), maxheight);
101 else { JS res = texture.stream; texture = null; throw new JSExn("image not found: "+res.unclone()); }
105 /** Adds the intersection of (x,y,w,h) and the node's current actual geometry to the Surface's dirty list */
106 public void dirty() { if (path==null) dirty(0, 0, contentwidth, contentheight); else dirty(path); }
107 public void dirty(int x, int y, int w, int h) { }
108 public void dirty(Path p) {
109 Affine a = transform.copy();
110 for(Box cur = this; cur != null; cur = cur.parent) a.premultiply(cur.transform);
111 long hbounds = p.horizontalBounds(a);
112 long vbounds = p.verticalBounds(a);
113 int x1 = (int)Encode.longToFloat2(hbounds);
114 int x2 = (int)Encode.longToFloat1(hbounds);
115 int y1 = (int)Encode.longToFloat2(vbounds);
116 int y2 = (int)Encode.longToFloat1(vbounds);
117 if (getSurface() != null) getSurface().dirty(x1, y1, x2-x1, y2-y1);
121 // Reflow ////////////////////////////////////////////////////////////////////////////////////////
123 /** should only be invoked on the root box */
124 public void reflow() {
125 constrain(this, Affine.identity());
135 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
136 child.width = max(child.minwidth, min(child.test(HSHRINK) ? child.contentwidth : width, child.maxwidth));
137 child.height = max(child.minheight, min(child.test(VSHRINK) ? child.contentheight : height, child.maxheight));
142 float slack = width, oldslack = 0, flex = 0, newflex = 0;
143 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
144 if (!child.test(VISIBLE)) continue;
145 slack -= (child.width = child.contentwidth);
146 if (child.width < (child.test(HSHRINK)?child.contentwidth:child.maxwidth)) flex += child.flex;
147 child.height = child.test(HSHRINK) ? child.contentheight : bound(child.contentheight, height, child.maxheight);
149 while(slack > 0 && flex > 0 && oldslack!=slack) {
152 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
153 if (!child.test(VISIBLE)) continue;
154 if (child.width < child.maxwidth && !child.test(HSHRINK))
155 child.width = bound(child.contentwidth, (int)(child.width + (slack/flex)), child.maxwidth);
156 newflex += child.width < child.maxwidth && !child.test(HSHRINK) ? child.flex : 0;
157 slack -= child.width;
161 float pos = slack / 2;
162 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
163 if (!child.test(VISIBLE)) continue;
164 child.transform.e += pos;
165 child.transform.f += (height-child.height)/2;
171 /** used (single-threadedly) in constrain() */
172 private static int xmin = 0, ymin = 0, xmax = 0, ymax = 0;
173 public void constrain(Box b, Affine a) {
176 a = a.copy().premultiply(transform);
178 //boolean relevant = packed() || ((fillcolor&0xff000000)!=0x0) || path!=null;
179 boolean relevant = true;
180 int save_xmin = xmin, save_ymin = ymin, save_xmax = xmax, save_ymax = ymax;
182 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
183 child.constrain(b, a);
184 contentwidth = max(contentwidth, child.contentwidth);
185 contentheight = max(contentheight, child.contentheight);
190 for(Box child = getChild(0); child != null; child = child.nextSibling()) {
191 xmin = Integer.MAX_VALUE; ymin = Integer.MAX_VALUE;
192 xmax = Integer.MIN_VALUE; ymax = Integer.MIN_VALUE;
194 child.transform.e = 0;
195 child.transform.f = 0;
197 child.constrain(this, Affine.identity());
198 if (xmin==Integer.MAX_VALUE||xmax==Integer.MIN_VALUE||ymin==Integer.MAX_VALUE||ymax== Integer.MIN_VALUE) continue;
200 child.transform.e = -1 * xmin;
201 child.transform.f = -1 * ymin;
203 contentwidth += (xmax-xmin);
204 contentheight = max(ymax-ymin, contentheight);
211 int cw = contentwidth = bound(minwidth, contentwidth, maxwidth);
212 int ch = contentheight = bound(minheight, contentheight, maxheight);
213 //#repeat contentwidth/contentheight contentheight/contentwidth minwidth/minheight row/col col/row \
214 // textwidth/textheight maxwidth/maxheight bounds/boundsy x1/y1 x2/y2 z1/q1 z2/q2 z3/q3 z4/q4 \
215 // horizontalBounds/verticalBounds e/f multiply_px/multiply_py xmin/ymin xmax/ymax
216 long bounds = path==null ? 0 : path.horizontalBounds(a);
217 float z1 = path==null ? a.multiply_px(0, 0) : Encode.longToFloat2(bounds);
218 float z2 = path==null ? a.multiply_px(cw, ch) : Encode.longToFloat1(bounds);
219 float z3 = path==null ? a.multiply_px(cw, 0) : Encode.longToFloat2(bounds);
220 float z4 = path==null ? a.multiply_px(0, ch) : Encode.longToFloat1(bounds);
221 xmin = min(xmin, (int)min(min(z1, z2), min(z3, z4)));
222 xmax = max(xmax, (int)max(max(z1, z2), max(z3, z4)));
227 // Rendering Pipeline /////////////////////////////////////////////////////////////////////
229 private static final boolean OPTIMIZE = false;
231 /** Renders self and children within the specified region. All rendering operations are clipped to xIn,yIn,wIn,hIn */
232 public void render(PixelBuffer buf, Affine a, Mesh clipFrom) { render(buf, a, clipFrom, Affine.identity()); }
233 public void render(PixelBuffer buf, Affine a, Mesh clipFrom, Affine clipa) {
234 if (!test(VISIBLE)) return;
235 a = a.copy().multiply(transform);
236 clipa = clipa.copy().multiply(transform);
239 if (path != null) mesh = new Mesh(path, true);
241 if (((fillcolor & 0xFF000000) != 0x00000000 || parent == null) && (text==null||"".equals(text)))
242 mesh = new Mesh().addRect(0, 0, contentwidth, contentheight);
243 // long ret = font.rasterizeGlyphs(text, buf, a, null, 0x777777, 0);
244 // minwidth = maxwidth = font.textwidth(text);
245 // minheight = maxheight = font.textwidth(text);
246 // if (ret == 0) Platform.Scheduler.add(this);
250 for(Box b = getChild(0); b != null; b = b.nextSibling()) b.render(buf, a, clipFrom, clipa);
254 // FIXME: mesh clipping code has been getting stuck in loops; to see this,
255 // uncomment the next two lines and swap the order of the last two lines.
257 //if (clipFrom != null) clipFrom.subtract(mesh, clipa);
258 //Mesh mesh = treeSize() > 0 ? this.mesh.copy() : this.mesh;
259 mesh.fill(buf, a, null, fillcolor, true);
260 for(Box b = getChild(0); b != null; b = b.nextSibling()) b.render(buf, a, mesh, Affine.identity());
263 // Methods to implement org.ibex.js.JS //////////////////////////////////////
265 public JS call(JS method, JS[] args) throws JSExn {
266 switch (args.length) {
268 //#switch(JSU.toString(method))
270 Box b = (Box)args[0];
271 if (b.parent != this)
272 return (redirect == null || redirect == this) ? JSU.N(-1) : redirect.call(method, args);
273 return JSU.N(b.getIndexInParent());
276 Box b = (Box)args[0];
277 JS ret = new JS.Obj();
278 ret.put(JSU.S("x"), JSU.N(b.localToGlobalX(0) - localToGlobalX(0)));
279 ret.put(JSU.S("y"), JSU.N(b.localToGlobalY(0) - localToGlobalY(0)));
285 return super.call(method, args);
288 public JS get(JS name) throws JSExn {
290 return redirect == null ? null : redirect == this ? getChild(JSU.toInt(name)) : redirect.get(name);
292 //#switch(JSU.toString(name))
293 case "surface": return parent == null ? null : parent.getAndTriggerTraps(name);
294 case "indexof": return METHOD;
295 case "distanceto": return METHOD;
296 case "text": return JSU.S(text);
298 if (path != null) return JSU.S(path.toString());
299 if (text == null) return null;
300 if (font == null) return null;
302 for(int i=0; i<text.length(); i++) ret += font.glyphs[text.charAt(i)].path;
305 case "fill": return JSU.S(Color.colorToString(fillcolor));
306 case "strokecolor": return JSU.S(Color.colorToString(strokecolor));
307 case "textcolor": return JSU.S(Color.colorToString(strokecolor));
308 case "font": return font == null ? null : font.stream;
309 case "fontsize": return font == null ? JSU.N(10) : JSU.N(font.pointsize);
310 case "thisbox": return this;
311 case "shrink": return JSU.B(test(HSHRINK) || test(VSHRINK));
312 case "hshrink": return JSU.B(test(HSHRINK));
313 case "vshrink": return JSU.B(test(VSHRINK));
314 case "flex": return JSU.N(flex);
315 case "width": getRoot().reflow(); return JSU.N(width);
316 case "height": getRoot().reflow(); return JSU.N(height);
317 case "minwidth": return JSU.N(minwidth);
318 case "maxwidth": return JSU.N(maxwidth);
319 case "minheight": return JSU.N(minheight);
320 case "maxheight": return JSU.N(maxheight);
321 case "clip": return JSU.B(test(CLIP));
322 case "visible": return JSU.B(test(VISIBLE) && (parent == null || (parent.get(JSU.S("visible")) == JSU.T)));
323 case "axis": return test(XAXIS) ? JSU.S("x") : test(YAXIS) ? JSU.S("y") : JSU.S("z");
324 case "globalx": return JSU.N(localToGlobalX(0));
325 case "globaly": return JSU.N(localToGlobalY(0));
326 case "cursor": return test(CURSOR) ? JSU.S((String)boxToCursor.get(this)) : null;
328 if (getSurface() == null) return null;
329 if (getSurface()._mousex == Integer.MAX_VALUE)
330 throw new JSExn("you cannot read from the box.mouse property in background thread context");
332 case "numchildren": return redirect == null ? JSU.N(0) : redirect == this ? JSU.N(treeSize()) : redirect.get(JSU.S("numchildren"));
333 case "redirect": return redirect == null ? null : redirect == this ? JSU.T : redirect.get(JSU.S("redirect"));
334 case "Minimized": if (parent == null && getSurface() != null) return JSU.B(getSurface().minimized);
335 default: return super.get(name);
337 throw new Error("unreachable"); // unreachable
340 private class Mouse extends JS.Immutable implements JS.Cloneable {
341 public JS get(JS key) throws JSExn {
342 //#switch(JSU.toString(key))
343 case "x": return JSU.N(globalToLocalX(getSurface()._mousex));
344 case "y": return JSU.N(globalToLocalY(getSurface()._mousey));
346 // this might not get recomputed if we change mousex/mousey...
347 case "inside": return JSU.B(test(MOUSEINSIDE));
349 return super.get(key);
353 //#repeat setWidth/setHeight minwidth/minheight maxwidth/maxheight pendingWidth/pendingHeight
354 public void setWidth(int min, int max) {
355 // FIXME: deal with conflicting min/max
356 if (this.minwidth == min && this.maxwidth == max) return;
360 if (parent != null || getSurface() == null) return;
361 getSurface().pendingWidth = maxwidth;
363 // FIXME: the repeat doesn't work right here
364 getSurface().setMinimumSize(minwidth, minheight, minwidth != maxwidth || minheight != maxheight);
368 public void put(JS name, JS value) throws JSExn {
369 if (JSU.isInt(name)) { put(JSU.toInt(name), value); return; }
370 //#switch(JSU.toString(name))
371 case "thisbox": if (value == null) removeSelf();
373 String s = value==null ? "" : JSU.toString(value);
375 minwidth = maxwidth = font.textwidth(text);
376 System.out.println("width=" + width);
377 minheight = maxheight = font.textheight(text);
378 System.out.println("height=" + height);
382 case "strokecolor": value = JSU.N(Color.stringToColor(JSU.toString(value))); CHECKSET_INT(strokecolor); dirty();
383 case "textcolor": value = JSU.N(Color.stringToColor(JSU.toString(value))); CHECKSET_INT(strokecolor); dirty();
384 case "shrink": CHECKSET_FLAG(HSHRINK | VSHRINK); RECONSTRAIN();
385 case "hshrink": CHECKSET_FLAG(HSHRINK); RECONSTRAIN();
386 case "vshrink": CHECKSET_FLAG(VSHRINK); RECONSTRAIN();
389 path = new Path(JSU.toString(value));
390 float tx = -1 * Encode.longToFloat2(path.horizontalBounds(Affine.identity()));
391 float ty = -1 * Encode.longToFloat2(path.verticalBounds(Affine.identity()));
392 path.transform(Affine.translate(tx, ty), true);
399 clippath = new Path(JSU.toString(value));
400 //float tx = -1 * Encode.longToFloat2(clippath.horizontalBounds(Affine.identity()));
401 //float ty = -1 * Encode.longToFloat2(clippath.verticalBounds(Affine.identity()));
402 //clippath.transform(Affine.translate(tx, ty), true);
408 case "x": transform.e = JSU.toInt(value);
409 case "y": transform.f = JSU.toInt(value);
411 transform = Affine.parse(JSU.toString(value));
414 if (getSurface() != null) // FIXME
415 getSurface().dirty(0, 0, getSurface().root.contentwidth, getSurface().root.contentheight);
417 RECONSTRAIN(); dirty(); polygon = null;
419 case "width": setWidth(JSU.toInt(value), JSU.toInt(value));
420 case "height": setHeight(JSU.toInt(value), JSU.toInt(value));
421 case "flex": flex = JSU.toFloat(value);
422 case "maxwidth": setWidth(minwidth, JSU.toInt(value));
423 case "minwidth": setWidth(JSU.toInt(value), maxwidth);
424 case "maxheight": setHeight(minheight, JSU.toInt(value));
425 case "minheight": setHeight(JSU.toInt(value), maxheight);
426 case "visible": CHECKSET_FLAG(VISIBLE); RECONSTRAIN(); dirty();
427 case "cursor": setCursor(JSU.toString(value));
428 case "fill": setFill(value);
429 case "clip": CHECKSET_FLAG(CLIP); if (parent == null) dirty(); else parent.dirty();
431 int mousex = JSU.toInt(((JS)value).get(JSU.S("x")));
432 int mousey = JSU.toInt(((JS)value).get(JSU.S("y")));
433 getSurface()._mousex = (int)localToGlobalX(mousex);
434 getSurface()._mousey = (int)localToGlobalY(mousey);
436 String s = JSU.toString(value);
437 if (s.equals("x")) { clear(YAXIS); set(XAXIS); }
438 else if (s.equals("y")) { clear(XAXIS); set(YAXIS); }
439 else if (s.equals("z")) { clear(XAXIS); clear(YAXIS); }
440 else JSU.warn("attempted to set axis property to invalid value: " + s);
442 case "Minimized": if (parent == null && getSurface() != null) getSurface().minimized = JSU.toBoolean(value); // FEATURE
443 case "Maximized": if (parent == null && getSurface() != null) getSurface().maximized = JSU.toBoolean(value); // FEATURE
444 case "Close": if (parent == null && getSurface() != null) getSurface().dispose(true);
446 for(Box cur = (Box)value; cur != null || cur == redirect; cur = cur.parent)
447 if (cur == redirect) { redirect = (Box)value; return; }
448 JSU.error("redirect can only be set to a descendant of its current value");
449 case "fontsize": font = Font.getFont(font == null ? null : font.stream, JSU.toInt(value)); RECONSTRAIN(); dirty();
451 if(!(value instanceof Fountain)) throw new JSExn("You can only put streams to the font property");
452 //FIXME: if (font == value) return; // FIXME: unclone()
453 font = value == null ? null : Font.getFont((Fountain)value, font == null ? 10 : font.pointsize);
456 case "titlebar": if (getSurface()!=null) getSurface().setTitleBarText(JSU.toString(value)); super.put(name,value);
459 case "Press1": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
460 case "Press2": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
461 case "Press3": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
462 case "Release1": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
463 case "Release2": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
464 case "Release3": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
465 case "Click1": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
466 case "Click2": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
467 case "Click3": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
468 case "DoubleClick1": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
469 case "DoubleClick2": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
470 case "DoubleClick3": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
471 case "KeyPressed": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
472 case "KeyReleased": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
473 case "Move": if (!test(STOP_UPWARD_PROPAGATION) && parent != null) parent.putAndTriggerTraps(name, value);
474 case "HScroll": if (!test(STOP_UPWARD_PROPAGATION) && parent != null)
475 parent.putAndTriggerTraps(name, JSU.N(JSU.toFloat(value) * ((float)parent.fontSize()) / ((float)fontSize())));
476 case "VScroll": if (!test(STOP_UPWARD_PROPAGATION) && parent != null)
477 parent.putAndTriggerTraps(name, JSU.N(JSU.toFloat(value) * ((float)parent.fontSize()) / ((float)fontSize())));
479 case "_Move": propagateDownward(name, value, false);
480 case "_Press1": propagateDownward(name, value, false);
481 case "_Press2": propagateDownward(name, value, false);
482 case "_Press3": propagateDownward(name, value, false);
483 case "_Release1": propagateDownward(name, value, false);
484 case "_Release2": propagateDownward(name, value, false);
485 case "_Release3": propagateDownward(name, value, false);
486 case "_Click1": propagateDownward(name, value, false);
487 case "_Click2": propagateDownward(name, value, false);
488 case "_Click3": propagateDownward(name, value, false);
489 case "_DoubleClick1": propagateDownward(name, value, false);
490 case "_DoubleClick2": propagateDownward(name, value, false);
491 case "_DoubleClick3": propagateDownward(name, value, false);
492 case "_KeyPressed": propagateDownward(name, value, false);
493 case "_KeyReleased": propagateDownward(name, value, false);
494 case "_HScroll": propagateDownward(name, value, false);
495 case "_VScroll": propagateDownward(name, value, false);
497 case "SizeChange": return;
498 case "ChildChange": return;
499 case "Enter": return;
500 case "Leave": return;
502 default: super.put(name, value);
506 private void setCursor(String value) throws JSExn {
507 if (value == null) { clear(CURSOR); boxToCursor.remove(this); return; }
508 if (value.equals(boxToCursor.get(this))) return;
510 boxToCursor.put(this, value);
511 Surface surface = getSurface();
512 if (surface == null) return;
513 String tempcursor = surface.cursor;
514 propagateDownward(null, null, false);
515 if (surface.cursor != tempcursor) surface.syncCursor();
518 private void setFill(JS value) throws JSExn {
520 if (texture == null && fillcolor == 0) return;
523 } else if (JSU.isString(value)) {
524 int newfillcolor = Color.stringToColor(JSU.toString(value));
525 if (newfillcolor == fillcolor) return;
526 fillcolor = newfillcolor;
529 Picture newtex = Picture.load((JS)value, this);
530 if (texture == newtex) return;
533 if (texture != null && texture.isLoaded) run(null);
539 * Handles events which propagate down the box tree. If obscured
540 * is set, then we merely check for Enter/Leave.
542 private void propagateDownward(JS name_, JS value, boolean obscured) throws JSExn {
544 String name = JSU.toString(name_);
545 if (getSurface() == null) return;
546 int x = (int)globalToLocalX(getSurface()._mousex);
547 int y = (int)globalToLocalY(getSurface()._mousey);
548 boolean wasinside = test(MOUSEINSIDE);
549 boolean isinside = test(VISIBLE) && inside(x, y) && !obscured;
550 if (!wasinside && isinside) {
552 putAndTriggerTrapsAndCatchExceptions(JSU.S("Enter"), JSU.T);
554 if (isinside && test(CURSOR)) getSurface().cursor = (String)boxToCursor.get(this);
555 if (wasinside && !isinside) {
557 putAndTriggerTrapsAndCatchExceptions(JSU.S("Leave"), JSU.T);
560 boolean found = false;
561 if (wasinside || isinside)
562 for(Box child = getChild(treeSize() - 1); child != null; child = child.prevSibling()) {
563 boolean save_stop = child.test(STOP_UPWARD_PROPAGATION);
565 if (name.equals("_HScroll") || name.equals("_VScroll"))
566 value2 = JSU.N(JSU.toFloat(value) * ((float)child.fontSize()) / (float)fontSize());
567 if (obscured /*|| !child.inside(x - child.x, y - child.y) FIXME FIXME */) {
568 child.propagateDownward(name_, value2, true);
571 child.clear(STOP_UPWARD_PROPAGATION);
572 if (name != null) child.putAndTriggerTrapsAndCatchExceptions(name_, value2);
573 else child.propagateDownward(name_, value2, obscured);
575 if (save_stop) child.set(STOP_UPWARD_PROPAGATION); else child.clear(STOP_UPWARD_PROPAGATION);
578 if (child.inside(x - child.x, y - child.y))
579 if (name != null && name.equals("_Move")) obscured = true;
584 if (!obscured && !found)
585 if ("_Move".equals(name) || name.startsWith("_Release") || wasinside)
587 putAndTriggerTrapsAndCatchExceptions(JSU.S(name.substring(1)), value);
590 /** figures out what box in this subtree of the Box owns the pixel at x,y relitave to the Surface */
591 public static Box whoIs(Box cur, int x, int y) {
593 if (cur.parent != null) throw new Error("whoIs may only be invoked on the root box of a surface");
597 // WARNING: this method is called from the event-queueing thread -- it may run concurrently with
598 // ANY part of Ibex, and is UNSYNCHRONIZED for performance reasons. BE CAREFUL HERE.
600 if (!cur.test(VISIBLE)) return null;
601 if (!cur.inside(x - globalx, y - globaly)) return cur.parent == null ? cur : null;
603 for(int i=cur.treeSize() - 1; i>=0; i--) {
604 Box child = cur.getChild(i);
605 if (child == null) continue; // since this method is unsynchronized, we have to double-check
606 globalx += child.transform.e;
607 globaly += child.transform.f;
608 if (child.test(VISIBLE) && child.inside(x - globalx, y - globaly)) { cur = child; continue OUTER; }
609 globalx -= child.transform.e;
610 globaly -= child.transform.f;
618 // Trivial Helper Methods (should be inlined) /////////////////////////////////////////
620 public final int fontSize() { return font == null ? DEFAULT_FONT.pointsize : font.pointsize; }
621 public Enumeration keys() { throw new Error("you cannot apply for..in to a " + this.getClass().getName()); }
622 public Box getRoot() { return parent == null ? this : parent.getRoot(); }
623 public Surface getSurface() { return Surface.fromBox(getRoot()); }
624 private final boolean packed() { return test(YAXIS) || test(XAXIS); }
625 Box nextPackedSibling() { Box b = nextSibling(); return b == null || (b.packed() && b.test(VISIBLE))?b:b.nextPackedSibling(); }
626 Box firstPackedChild() { Box b = getChild(0); return b == null || (b.packed() && b.test(VISIBLE))?b:b.nextPackedSibling(); }
627 public float globalToLocalX(float x) { return parent == null ? x : parent.globalToLocalX(x - transform.e); }
628 public float globalToLocalY(float y) { return parent == null ? y : parent.globalToLocalY(y - transform.f); }
629 public float localToGlobalX(float x) { return parent == null ? x : parent.globalToLocalX(x + transform.e); }
630 public float localToGlobalY(float y) { return parent == null ? y : parent.globalToLocalY(y + transform.f); }
632 static short min(short a, short b) { if (a<b) return a; else return b; }
633 static int min(int a, int b) { if (a<b) return a; else return b; }
634 static float min(float a, float b) { if (a<b) return a; else return b; }
636 static short max(short a, short b) { if (a>b) return a; else return b; }
637 static int max(int a, int b) { if (a>b) return a; else return b; }
638 static float max(float a, float b) { if (a>b) return a; else return b; }
640 static 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; }
641 static 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; }
642 static int bound(int a, int b, int c) { if (c < b) return c; if (a > b) return a; return b; }
643 final boolean inside(int x, int y) { return test(VISIBLE) && x >= 0 && y >= 0 && x < width && y < height; }
645 void set(int mask) { flags |= mask; }
646 void set(int mask, boolean setclear) { if (setclear) set(mask); else clear(mask); }
647 void clear(int mask) { flags &= ~mask; }
648 public boolean test(int mask) { return ((flags & mask) == mask); }
651 // Tree Handling //////////////////////////////////////////////////////////////////////
653 public final int getIndexInParent() { return parent == null ? 0 : parent.indexNode(this); }
654 public final Box nextSibling() { return parent == null ? null : parent.getChild(parent.indexNode(this) + 1); }
655 public final Box prevSibling() { return parent == null ? null : parent.getChild(parent.indexNode(this) - 1); }
656 public final Box getChild(int i) {
657 if (i < 0) return null;
658 if (i >= treeSize()) return null;
659 return (Box)getNode(i);
662 // Tree Manipulation /////////////////////////////////////////////////////////////////////
664 public void removeSelf() {
665 if (parent != null) { parent.removeChild(parent.indexNode(this)); return; }
666 Surface surface = Surface.fromBox(this);
667 if (surface != null) surface.dispose(true);
670 /** remove the i^th child */
671 public void removeChild(int i) {
675 b.clear(MOUSEINSIDE);
679 putAndTriggerTrapsAndCatchExceptions(JSU.S("ChildChange"), b);
682 public void put(int i, JS value) throws JSExn {
685 if (value != null && !(value instanceof Box)) {
686 if (Log.on) JSU.warn("attempt to set a numerical property on a box to a non-box");
690 if (redirect == null) {
691 if (value == null) putAndTriggerTrapsAndCatchExceptions(JSU.S("ChildChange"), getChild(i));
692 else JSU.warn("attempt to add/remove children to/from a node with a null redirect");
694 } else if (redirect != this) {
695 if (value != null) putAndTriggerTrapsAndCatchExceptions(JSU.S("ChildChange"), value);
696 redirect.put(i, value);
698 Box b = (Box)redirect.get(JSU.N(i));
699 if (b != null) putAndTriggerTrapsAndCatchExceptions(JSU.S("ChildChange"), b);
702 } else if (value == null) {
703 if (i < 0 || i > treeSize()) return;
706 putAndTriggerTrapsAndCatchExceptions(JSU.S("ChildChange"), b);
711 // check if box being moved is currently target of a redirect
712 for(Box cur = b.parent; cur != null; cur = cur.parent)
713 if (cur.redirect == b) {
714 if (Log.on) JSU.warn("attempt to move a box that is the target of a redirect");
718 // check for recursive ancestor violation
719 for(Box cur = this; cur != null; cur = cur.parent)
721 if (Log.on) JSU.warn("attempt to make a node a parent of its own ancestor");
722 if (Log.on) Log.info(this, "box == " + this + " ancestor == " + b);
726 if (b.parent != null) b.parent.removeChild(b.parent.indexNode(b));
730 // need both of these in case child was already uncalc'ed
735 putAndTriggerTrapsAndCatchExceptions(JSU.S("ChildChange"), b);
739 public void putAndTriggerTrapsAndCatchExceptions(JS name, JS val) {
741 putAndTriggerTraps(name, val);
743 JSU.log("caught js exception while putting to trap \""+ JSU.str(name)+"\"");
745 } catch (Exception e) {
746 JSU.log("caught exception while putting to trap \""+ JSU.str(name)+"\"");
751 // BalancedTree functions
752 private void insertNode(int p, Box b) { if(bt == null) bt = new BalancedTree(); bt.insertNode(p,b); }
753 private int treeSize() { return bt == null ? 0 : bt.treeSize(); }
754 private int indexNode(Box b) { return bt == null ? -1 : bt.indexNode(b); }
755 private void deleteNode(int p) { bt.deleteNode(p); }
756 private Box getNode(int p) { return (Box)bt.getNode(p); }
759 final static JS.Method METHOD = new JS.Method();
760 final static Basket.Map boxToCursor = new Basket.Hash(500, 3);
761 final static JS SIZECHANGE = JSU.S("SizeChange");
762 final static Font DEFAULT_FONT = Font.getFont(Main.vera, 10);
765 // Flags //////////////////////////////////////////////////////////////////////
767 public static final int MOUSEINSIDE = 0x00000001;
768 public static final int XAXIS = 0x00000002;
769 public static final int YAXIS = 0x00000004;
770 public static final int VISIBLE = 0x00000008;
771 public static final int VSHRINK = 0x00000010;
772 public static final int HSHRINK = 0x00000020;
773 public static final int RECONSTRAIN = 0x00000040;
774 public static final int REPLACE = 0x00000080;
776 // if true, this box has cursor in the cursor hash; FEATURE: GC issues?
777 public static final int CURSOR = 0x00010000;
778 public static final int CLIP = 0x00020000;
779 public static final int STOP_UPWARD_PROPAGATION = 0x00040000;
780 public static final int MOVED = 0x00080000;