1// script.aculo.us dragdrop.js v1.8.3, Thu Oct 08 11:23:33 +0200 2009 2 3// Copyright (c) 2005-2009 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) 4// 5// script.aculo.us is freely distributable under the terms of an MIT-style license. 6// For details, see the script.aculo.us web site: http://script.aculo.us/ 7 8if(Object.isUndefined(Effect)) 9 throw("dragdrop.js requires including script.aculo.us' effects.js library"); 10 11var Droppables = { 12 drops: [], 13 14 remove: function(element) { 15 this.drops = this.drops.reject(function(d) { return d.element==$(element) }); 16 }, 17 18 add: function(element) { 19 element = $(element); 20 var options = Object.extend({ 21 greedy: true, 22 hoverclass: null, 23 tree: false 24 }, arguments[1] || { }); 25 26 // cache containers 27 if(options.containment) { 28 options._containers = []; 29 var containment = options.containment; 30 if(Object.isArray(containment)) { 31 containment.each( function(c) { options._containers.push($(c)) }); 32 } else { 33 options._containers.push($(containment)); 34 } 35 } 36 37 if(options.accept) options.accept = [options.accept].flatten(); 38 39 Element.makePositioned(element); // fix IE 40 options.element = element; 41 42 this.drops.push(options); 43 }, 44 45 findDeepestChild: function(drops) { 46 deepest = drops[0]; 47 48 for (i = 1; i < drops.length; ++i) 49 if (Element.isParent(drops[i].element, deepest.element)) 50 deepest = drops[i]; 51 52 return deepest; 53 }, 54 55 isContained: function(element, drop) { 56 var containmentNode; 57 if(drop.tree) { 58 containmentNode = element.treeNode; 59 } else { 60 containmentNode = element.parentNode; 61 } 62 return drop._containers.detect(function(c) { return containmentNode == c }); 63 }, 64 65 isAffected: function(point, element, drop) { 66 return ( 67 (drop.element!=element) && 68 ((!drop._containers) || 69 this.isContained(element, drop)) && 70 ((!drop.accept) || 71 (Element.classNames(element).detect( 72 function(v) { return drop.accept.include(v) } ) )) && 73 Position.within(drop.element, point[0], point[1]) ); 74 }, 75 76 deactivate: function(drop) { 77 if(drop.hoverclass) 78 Element.removeClassName(drop.element, drop.hoverclass); 79 this.last_active = null; 80 }, 81 82 activate: function(drop) { 83 if(drop.hoverclass) 84 Element.addClassName(drop.element, drop.hoverclass); 85 this.last_active = drop; 86 }, 87 88 show: function(point, element) { 89 if(!this.drops.length) return; 90 var drop, affected = []; 91 92 this.drops.each( function(drop) { 93 if(Droppables.isAffected(point, element, drop)) 94 affected.push(drop); 95 }); 96 97 if(affected.length>0) 98 drop = Droppables.findDeepestChild(affected); 99 100 if(this.last_active && this.last_active != drop) this.deactivate(this.last_active); 101 if (drop) { 102 Position.within(drop.element, point[0], point[1]); 103 if(drop.onHover) 104 drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element)); 105 106 if (drop != this.last_active) Droppables.activate(drop); 107 } 108 }, 109 110 fire: function(event, element) { 111 if(!this.last_active) return; 112 Position.prepare(); 113 114 if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active)) 115 if (this.last_active.onDrop) { 116 this.last_active.onDrop(element, this.last_active.element, event); 117 return true; 118 } 119 }, 120 121 reset: function() { 122 if(this.last_active) 123 this.deactivate(this.last_active); 124 } 125}; 126 127var Draggables = { 128 drags: [], 129 observers: [], 130 131 register: function(draggable) { 132 if(this.drags.length == 0) { 133 this.eventMouseUp = this.endDrag.bindAsEventListener(this); 134 this.eventMouseMove = this.updateDrag.bindAsEventListener(this); 135 this.eventKeypress = this.keyPress.bindAsEventListener(this); 136 137 Event.observe(document, "mouseup", this.eventMouseUp); 138 Event.observe(document, "mousemove", this.eventMouseMove); 139 Event.observe(document, "keypress", this.eventKeypress); 140 } 141 this.drags.push(draggable); 142 }, 143 144 unregister: function(draggable) { 145 this.drags = this.drags.reject(function(d) { return d==draggable }); 146 if(this.drags.length == 0) { 147 Event.stopObserving(document, "mouseup", this.eventMouseUp); 148 Event.stopObserving(document, "mousemove", this.eventMouseMove); 149 Event.stopObserving(document, "keypress", this.eventKeypress); 150 } 151 }, 152 153 activate: function(draggable) { 154 if(draggable.options.delay) { 155 this._timeout = setTimeout(function() { 156 Draggables._timeout = null; 157 window.focus(); 158 Draggables.activeDraggable = draggable; 159 }.bind(this), draggable.options.delay); 160 } else { 161 window.focus(); // allows keypress events if window isn't currently focused, fails for Safari 162 this.activeDraggable = draggable; 163 } 164 }, 165 166 deactivate: function() { 167 this.activeDraggable = null; 168 }, 169 170 updateDrag: function(event) { 171 if(!this.activeDraggable) return; 172 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 173 // Mozilla-based browsers fire successive mousemove events with 174 // the same coordinates, prevent needless redrawing (moz bug?) 175 if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return; 176 this._lastPointer = pointer; 177 178 this.activeDraggable.updateDrag(event, pointer); 179 }, 180 181 endDrag: function(event) { 182 if(this._timeout) { 183 clearTimeout(this._timeout); 184 this._timeout = null; 185 } 186 if(!this.activeDraggable) return; 187 this._lastPointer = null; 188 this.activeDraggable.endDrag(event); 189 this.activeDraggable = null; 190 }, 191 192 keyPress: function(event) { 193 if(this.activeDraggable) 194 this.activeDraggable.keyPress(event); 195 }, 196 197 addObserver: function(observer) { 198 this.observers.push(observer); 199 this._cacheObserverCallbacks(); 200 }, 201 202 removeObserver: function(element) { // element instead of observer fixes mem leaks 203 this.observers = this.observers.reject( function(o) { return o.element==element }); 204 this._cacheObserverCallbacks(); 205 }, 206 207 notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag' 208 if(this[eventName+'Count'] > 0) 209 this.observers.each( function(o) { 210 if(o[eventName]) o[eventName](eventName, draggable, event); 211 }); 212 if(draggable.options[eventName]) draggable.options[eventName](draggable, event); 213 }, 214 215 _cacheObserverCallbacks: function() { 216 ['onStart','onEnd','onDrag'].each( function(eventName) { 217 Draggables[eventName+'Count'] = Draggables.observers.select( 218 function(o) { return o[eventName]; } 219 ).length; 220 }); 221 } 222}; 223 224/*--------------------------------------------------------------------------*/ 225 226var Draggable = Class.create({ 227 initialize: function(element) { 228 var defaults = { 229 handle: false, 230 reverteffect: function(element, top_offset, left_offset) { 231 var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02; 232 new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur, 233 queue: {scope:'_draggable', position:'end'} 234 }); 235 }, 236 endeffect: function(element) { 237 var toOpacity = Object.isNumber(element._opacity) ? element._opacity : 1.0; 238 new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity, 239 queue: {scope:'_draggable', position:'end'}, 240 afterFinish: function(){ 241 Draggable._dragging[element] = false 242 } 243 }); 244 }, 245 zindex: 1000, 246 revert: false, 247 quiet: false, 248 scroll: false, 249 scrollSensitivity: 20, 250 scrollSpeed: 15, 251 snap: false, // false, or xy or [x,y] or function(x,y){ return [x,y] } 252 delay: 0 253 }; 254 255 if(!arguments[1] || Object.isUndefined(arguments[1].endeffect)) 256 Object.extend(defaults, { 257 starteffect: function(element) { 258 element._opacity = Element.getOpacity(element); 259 Draggable._dragging[element] = true; 260 new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7}); 261 } 262 }); 263 264 var options = Object.extend(defaults, arguments[1] || { }); 265 266 this.element = $(element); 267 268 if(options.handle && Object.isString(options.handle)) 269 this.handle = this.element.down('.'+options.handle, 0); 270 271 if(!this.handle) this.handle = $(options.handle); 272 if(!this.handle) this.handle = this.element; 273 274 if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) { 275 options.scroll = $(options.scroll); 276 this._isScrollChild = Element.childOf(this.element, options.scroll); 277 } 278 279 Element.makePositioned(this.element); // fix IE 280 281 this.options = options; 282 this.dragging = false; 283 284 this.eventMouseDown = this.initDrag.bindAsEventListener(this); 285 Event.observe(this.handle, "mousedown", this.eventMouseDown); 286 287 Draggables.register(this); 288 }, 289 290 destroy: function() { 291 Event.stopObserving(this.handle, "mousedown", this.eventMouseDown); 292 Draggables.unregister(this); 293 }, 294 295 currentDelta: function() { 296 return([ 297 parseInt(Element.getStyle(this.element,'left') || '0'), 298 parseInt(Element.getStyle(this.element,'top') || '0')]); 299 }, 300 301 initDrag: function(event) { 302 if(!Object.isUndefined(Draggable._dragging[this.element]) && 303 Draggable._dragging[this.element]) return; 304 if(Event.isLeftClick(event)) { 305 // abort on form elements, fixes a Firefox issue 306 var src = Event.element(event); 307 if((tag_name = src.tagName.toUpperCase()) && ( 308 tag_name=='INPUT' || 309 tag_name=='SELECT' || 310 tag_name=='OPTION' || 311 tag_name=='BUTTON' || 312 tag_name=='TEXTAREA')) return; 313 314 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 315 var pos = this.element.cumulativeOffset(); 316 this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) }); 317 318 Draggables.activate(this); 319 Event.stop(event); 320 } 321 }, 322 323 startDrag: function(event) { 324 this.dragging = true; 325 if(!this.delta) 326 this.delta = this.currentDelta(); 327 328 if(this.options.zindex) { 329 this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0); 330 this.element.style.zIndex = this.options.zindex; 331 } 332 333 if(this.options.ghosting) { 334 this._clone = this.element.cloneNode(true); 335 this._originallyAbsolute = (this.element.getStyle('position') == 'absolute'); 336 if (!this._originallyAbsolute) 337 Position.absolutize(this.element); 338 this.element.parentNode.insertBefore(this._clone, this.element); 339 } 340 341 if(this.options.scroll) { 342 if (this.options.scroll == window) { 343 var where = this._getWindowScroll(this.options.scroll); 344 this.originalScrollLeft = where.left; 345 this.originalScrollTop = where.top; 346 } else { 347 this.originalScrollLeft = this.options.scroll.scrollLeft; 348 this.originalScrollTop = this.options.scroll.scrollTop; 349 } 350 } 351 352 Draggables.notify('onStart', this, event); 353 354 if(this.options.starteffect) this.options.starteffect(this.element); 355 }, 356 357 updateDrag: function(event, pointer) { 358 if(!this.dragging) this.startDrag(event); 359 360 if(!this.options.quiet){ 361 Position.prepare(); 362 Droppables.show(pointer, this.element); 363 } 364 365 Draggables.notify('onDrag', this, event); 366 367 this.draw(pointer); 368 if(this.options.change) this.options.change(this); 369 370 if(this.options.scroll) { 371 this.stopScrolling(); 372 373 var p; 374 if (this.options.scroll == window) { 375 with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; } 376 } else { 377 p = Position.page(this.options.scroll); 378 p[0] += this.options.scroll.scrollLeft + Position.deltaX; 379 p[1] += this.options.scroll.scrollTop + Position.deltaY; 380 p.push(p[0]+this.options.scroll.offsetWidth); 381 p.push(p[1]+this.options.scroll.offsetHeight); 382 } 383 var speed = [0,0]; 384 if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity); 385 if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity); 386 if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity); 387 if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity); 388 this.startScrolling(speed); 389 } 390 391 // fix AppleWebKit rendering 392 if(Prototype.Browser.WebKit) window.scrollBy(0,0); 393 394 Event.stop(event); 395 }, 396 397 finishDrag: function(event, success) { 398 this.dragging = false; 399 400 if(this.options.quiet){ 401 Position.prepare(); 402 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 403 Droppables.show(pointer, this.element); 404 } 405 406 if(this.options.ghosting) { 407 if (!this._originallyAbsolute) 408 Position.relativize(this.element); 409 delete this._originallyAbsolute; 410 Element.remove(this._clone); 411 this._clone = null; 412 } 413 414 var dropped = false; 415 if(success) { 416 dropped = Droppables.fire(event, this.element); 417 if (!dropped) dropped = false; 418 } 419 if(dropped && this.options.onDropped) this.options.onDropped(this.element); 420 Draggables.notify('onEnd', this, event); 421 422 var revert = this.options.revert; 423 if(revert && Object.isFunction(revert)) revert = revert(this.element); 424 425 var d = this.currentDelta(); 426 if(revert && this.options.reverteffect) { 427 if (dropped == 0 || revert != 'failure') 428 this.options.reverteffect(this.element, 429 d[1]-this.delta[1], d[0]-this.delta[0]); 430 } else { 431 this.delta = d; 432 } 433 434 if(this.options.zindex) 435 this.element.style.zIndex = this.originalZ; 436 437 if(this.options.endeffect) 438 this.options.endeffect(this.element); 439 440 Draggables.deactivate(this); 441 Droppables.reset(); 442 }, 443 444 keyPress: function(event) { 445 if(event.keyCode!=Event.KEY_ESC) return; 446 this.finishDrag(event, false); 447 Event.stop(event); 448 }, 449 450 endDrag: function(event) { 451 if(!this.dragging) return; 452 this.stopScrolling(); 453 this.finishDrag(event, true); 454 Event.stop(event); 455 }, 456 457 draw: function(point) { 458 var pos = this.element.cumulativeOffset(); 459 if(this.options.ghosting) { 460 var r = Position.realOffset(this.element); 461 pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY; 462 } 463 464 var d = this.currentDelta(); 465 pos[0] -= d[0]; pos[1] -= d[1]; 466 467 if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) { 468 pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft; 469 pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop; 470 } 471 472 var p = [0,1].map(function(i){ 473 return (point[i]-pos[i]-this.offset[i]) 474 }.bind(this)); 475 476 if(this.options.snap) { 477 if(Object.isFunction(this.options.snap)) { 478 p = this.options.snap(p[0],p[1],this); 479 } else { 480 if(Object.isArray(this.options.snap)) { 481 p = p.map( function(v, i) { 482 return (v/this.options.snap[i]).round()*this.options.snap[i] }.bind(this)); 483 } else { 484 p = p.map( function(v) { 485 return (v/this.options.snap).round()*this.options.snap }.bind(this)); 486 } 487 }} 488 489 var style = this.element.style; 490 if((!this.options.constraint) || (this.options.constraint=='horizontal')) 491 style.left = p[0] + "px"; 492 if((!this.options.constraint) || (this.options.constraint=='vertical')) 493 style.top = p[1] + "px"; 494 495 if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering 496 }, 497 498 stopScrolling: function() { 499 if(this.scrollInterval) { 500 clearInterval(this.scrollInterval); 501 this.scrollInterval = null; 502 Draggables._lastScrollPointer = null; 503 } 504 }, 505 506 startScrolling: function(speed) { 507 if(!(speed[0] || speed[1])) return; 508 this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed]; 509 this.lastScrolled = new Date(); 510 this.scrollInterval = setInterval(this.scroll.bind(this), 10); 511 }, 512 513 scroll: function() { 514 var current = new Date(); 515 var delta = current - this.lastScrolled; 516 this.lastScrolled = current; 517 if(this.options.scroll == window) { 518 with (this._getWindowScroll(this.options.scroll)) { 519 if (this.scrollSpeed[0] || this.scrollSpeed[1]) { 520 var d = delta / 1000; 521 this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] ); 522 } 523 } 524 } else { 525 this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000; 526 this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000; 527 } 528 529 Position.prepare(); 530 Droppables.show(Draggables._lastPointer, this.element); 531 Draggables.notify('onDrag', this); 532 if (this._isScrollChild) { 533 Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer); 534 Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000; 535 Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000; 536 if (Draggables._lastScrollPointer[0] < 0) 537 Draggables._lastScrollPointer[0] = 0; 538 if (Draggables._lastScrollPointer[1] < 0) 539 Draggables._lastScrollPointer[1] = 0; 540 this.draw(Draggables._lastScrollPointer); 541 } 542 543 if(this.options.change) this.options.change(this); 544 }, 545 546 _getWindowScroll: function(w) { 547 var T, L, W, H; 548 with (w.document) { 549 if (w.document.documentElement && documentElement.scrollTop) { 550 T = documentElement.scrollTop; 551 L = documentElement.scrollLeft; 552 } else if (w.document.body) { 553 T = body.scrollTop; 554 L = body.scrollLeft; 555 } 556 if (w.innerWidth) { 557 W = w.innerWidth; 558 H = w.innerHeight; 559 } else if (w.document.documentElement && documentElement.clientWidth) { 560 W = documentElement.clientWidth; 561 H = documentElement.clientHeight; 562 } else { 563 W = body.offsetWidth; 564 H = body.offsetHeight; 565 } 566 } 567 return { top: T, left: L, width: W, height: H }; 568 } 569}); 570 571Draggable._dragging = { }; 572 573/*--------------------------------------------------------------------------*/ 574 575var SortableObserver = Class.create({ 576 initialize: function(element, observer) { 577 this.element = $(element); 578 this.observer = observer; 579 this.lastValue = Sortable.serialize(this.element); 580 }, 581 582 onStart: function() { 583 this.lastValue = Sortable.serialize(this.element); 584 }, 585 586 onEnd: function() { 587 Sortable.unmark(); 588 if(this.lastValue != Sortable.serialize(this.element)) 589 this.observer(this.element) 590 } 591}); 592 593var Sortable = { 594 SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/, 595 596 sortables: { }, 597 598 _findRootElement: function(element) { 599 while (element.tagName.toUpperCase() != "BODY") { 600 if(element.id && Sortable.sortables[element.id]) return element; 601 element = element.parentNode; 602 } 603 }, 604 605 options: function(element) { 606 element = Sortable._findRootElement($(element)); 607 if(!element) return; 608 return Sortable.sortables[element.id]; 609 }, 610 611 destroy: function(element){ 612 element = $(element); 613 var s = Sortable.sortables[element.id]; 614 615 if(s) { 616 Draggables.removeObserver(s.element); 617 s.droppables.each(function(d){ Droppables.remove(d) }); 618 s.draggables.invoke('destroy'); 619 620 delete Sortable.sortables[s.element.id]; 621 } 622 }, 623 624 create: function(element) { 625 element = $(element); 626 var options = Object.extend({ 627 element: element, 628 tag: 'li', // assumes li children, override with tag: 'tagname' 629 dropOnEmpty: false, 630 tree: false, 631 treeTag: 'ul', 632 overlap: 'vertical', // one of 'vertical', 'horizontal' 633 constraint: 'vertical', // one of 'vertical', 'horizontal', false 634 containment: element, // also takes array of elements (or id's); or false 635 handle: false, // or a CSS class 636 only: false, 637 delay: 0, 638 hoverclass: null, 639 ghosting: false, 640 quiet: false, 641 scroll: false, 642 scrollSensitivity: 20, 643 scrollSpeed: 15, 644 format: this.SERIALIZE_RULE, 645 646 // these take arrays of elements or ids and can be 647 // used for better initialization performance 648 elements: false, 649 handles: false, 650 651 onChange: Prototype.emptyFunction, 652 onUpdate: Prototype.emptyFunction 653 }, arguments[1] || { }); 654 655 // clear any old sortable with same element 656 this.destroy(element); 657 658 // build options for the draggables 659 var options_for_draggable = { 660 revert: true, 661 quiet: options.quiet, 662 scroll: options.scroll, 663 scrollSpeed: options.scrollSpeed, 664 scrollSensitivity: options.scrollSensitivity, 665 delay: options.delay, 666 ghosting: options.ghosting, 667 constraint: options.constraint, 668 handle: options.handle }; 669 670 if(options.starteffect) 671 options_for_draggable.starteffect = options.starteffect; 672 673 if(options.reverteffect) 674 options_for_draggable.reverteffect = options.reverteffect; 675 else 676 if(options.ghosting) options_for_draggable.reverteffect = function(element) { 677 element.style.top = 0; 678 element.style.left = 0; 679 }; 680 681 if(options.endeffect) 682 options_for_draggable.endeffect = options.endeffect; 683 684 if(options.zindex) 685 options_for_draggable.zindex = options.zindex; 686 687 // build options for the droppables 688 var options_for_droppable = { 689 overlap: options.overlap, 690 containment: options.containment, 691 tree: options.tree, 692 hoverclass: options.hoverclass, 693 onHover: Sortable.onHover 694 }; 695 696 var options_for_tree = { 697 onHover: Sortable.onEmptyHover, 698 overlap: options.overlap, 699 containment: options.containment, 700 hoverclass: options.hoverclass 701 }; 702 703 // fix for gecko engine 704 Element.cleanWhitespace(element); 705 706 options.draggables = []; 707 options.droppables = []; 708 709 // drop on empty handling 710 if(options.dropOnEmpty || options.tree) { 711 Droppables.add(element, options_for_tree); 712 options.droppables.push(element); 713 } 714 715 (options.elements || this.findElements(element, options) || []).each( function(e,i) { 716 var handle = options.handles ? $(options.handles[i]) : 717 (options.handle ? $(e).select('.' + options.handle)[0] : e); 718 options.draggables.push( 719 new Draggable(e, Object.extend(options_for_draggable, { handle: handle }))); 720 Droppables.add(e, options_for_droppable); 721 if(options.tree) e.treeNode = element; 722 options.droppables.push(e); 723 }); 724 725 if(options.tree) { 726 (Sortable.findTreeElements(element, options) || []).each( function(e) { 727 Droppables.add(e, options_for_tree); 728 e.treeNode = element; 729 options.droppables.push(e); 730 }); 731 } 732 733 // keep reference 734 this.sortables[element.identify()] = options; 735 736 // for onupdate 737 Draggables.addObserver(new SortableObserver(element, options.onUpdate)); 738 739 }, 740 741 // return all suitable-for-sortable elements in a guaranteed order 742 findElements: function(element, options) { 743 return Element.findChildren( 744 element, options.only, options.tree ? true : false, options.tag); 745 }, 746 747 findTreeElements: function(element, options) { 748 return Element.findChildren( 749 element, options.only, options.tree ? true : false, options.treeTag); 750 }, 751 752 onHover: function(element, dropon, overlap) { 753 if(Element.isParent(dropon, element)) return; 754 755 if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) { 756 return; 757 } else if(overlap>0.5) { 758 Sortable.mark(dropon, 'before'); 759 if(dropon.previousSibling != element) { 760 var oldParentNode = element.parentNode; 761 element.style.visibility = "hidden"; // fix gecko rendering 762 dropon.parentNode.insertBefore(element, dropon); 763 if(dropon.parentNode!=oldParentNode) 764 Sortable.options(oldParentNode).onChange(element); 765 Sortable.options(dropon.parentNode).onChange(element); 766 } 767 } else { 768 Sortable.mark(dropon, 'after'); 769 var nextElement = dropon.nextSibling || null; 770 if(nextElement != element) { 771 var oldParentNode = element.parentNode; 772 element.style.visibility = "hidden"; // fix gecko rendering 773 dropon.parentNode.insertBefore(element, nextElement); 774 if(dropon.parentNode!=oldParentNode) 775 Sortable.options(oldParentNode).onChange(element); 776 Sortable.options(dropon.parentNode).onChange(element); 777 } 778 } 779 }, 780 781 onEmptyHover: function(element, dropon, overlap) { 782 var oldParentNode = element.parentNode; 783 var droponOptions = Sortable.options(dropon); 784 785 if(!Element.isParent(dropon, element)) { 786 var index; 787 788 var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only}); 789 var child = null; 790 791 if(children) { 792 var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap); 793 794 for (index = 0; index < children.length; index += 1) { 795 if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) { 796 offset -= Element.offsetSize (children[index], droponOptions.overlap); 797 } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) { 798 child = index + 1 < children.length ? children[index + 1] : null; 799 break; 800 } else { 801 child = children[index]; 802 break; 803 } 804 } 805 } 806 807 dropon.insertBefore(element, child); 808 809 Sortable.options(oldParentNode).onChange(element); 810 droponOptions.onChange(element); 811 } 812 }, 813 814 unmark: function() { 815 if(Sortable._marker) Sortable._marker.hide(); 816 }, 817 818 mark: function(dropon, position) { 819 // mark on ghosting only 820 var sortable = Sortable.options(dropon.parentNode); 821 if(sortable && !sortable.ghosting) return; 822 823 if(!Sortable._marker) { 824 Sortable._marker = 825 ($('dropmarker') || Element.extend(document.createElement('DIV'))). 826 hide().addClassName('dropmarker').setStyle({position:'absolute'}); 827 document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); 828 } 829 var offsets = dropon.cumulativeOffset(); 830 Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'}); 831 832 if(position=='after') 833 if(sortable.overlap == 'horizontal') 834 Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'}); 835 else 836 Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'}); 837 838 Sortable._marker.show(); 839 }, 840 841 _tree: function(element, options, parent) { 842 var children = Sortable.findElements(element, options) || []; 843 844 for (var i = 0; i < children.length; ++i) { 845 var match = children[i].id.match(options.format); 846 847 if (!match) continue; 848 849 var child = { 850 id: encodeURIComponent(match ? match[1] : null), 851 element: element, 852 parent: parent, 853 children: [], 854 position: parent.children.length, 855 container: $(children[i]).down(options.treeTag) 856 }; 857 858 /* Get the element containing the children and recurse over it */ 859 if (child.container) 860 this._tree(child.container, options, child); 861 862 parent.children.push (child); 863 } 864 865 return parent; 866 }, 867 868 tree: function(element) { 869 element = $(element); 870 var sortableOptions = this.options(element); 871 var options = Object.extend({ 872 tag: sortableOptions.tag, 873 treeTag: sortableOptions.treeTag, 874 only: sortableOptions.only, 875 name: element.id, 876 format: sortableOptions.format 877 }, arguments[1] || { }); 878 879 var root = { 880 id: null, 881 parent: null, 882 children: [], 883 container: element, 884 position: 0 885 }; 886 887 return Sortable._tree(element, options, root); 888 }, 889 890 /* Construct a [i] index for a particular node */ 891 _constructIndex: function(node) { 892 var index = ''; 893 do { 894 if (node.id) index = '[' + node.position + ']' + index; 895 } while ((node = node.parent) != null); 896 return index; 897 }, 898 899 sequence: function(element) { 900 element = $(element); 901 var options = Object.extend(this.options(element), arguments[1] || { }); 902 903 return $(this.findElements(element, options) || []).map( function(item) { 904 return item.id.match(options.format) ? item.id.match(options.format)[1] : ''; 905 }); 906 }, 907 908 setSequence: function(element, new_sequence) { 909 element = $(element); 910 var options = Object.extend(this.options(element), arguments[2] || { }); 911 912 var nodeMap = { }; 913 this.findElements(element, options).each( function(n) { 914 if (n.id.match(options.format)) 915 nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode]; 916 n.parentNode.removeChild(n); 917 }); 918 919 new_sequence.each(function(ident) { 920 var n = nodeMap[ident]; 921 if (n) { 922 n[1].appendChild(n[0]); 923 delete nodeMap[ident]; 924 } 925 }); 926 }, 927 928 serialize: function(element) { 929 element = $(element); 930 var options = Object.extend(Sortable.options(element), arguments[1] || { }); 931 var name = encodeURIComponent( 932 (arguments[1] && arguments[1].name) ? arguments[1].name : element.id); 933 934 if (options.tree) { 935 return Sortable.tree(element, arguments[1]).children.map( function (item) { 936 return [name + Sortable._constructIndex(item) + "[id]=" + 937 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee)); 938 }).flatten().join('&'); 939 } else { 940 return Sortable.sequence(element, arguments[1]).map( function(item) { 941 return name + "[]=" + encodeURIComponent(item); 942 }).join('&'); 943 } 944 } 945}; 946 947// Returns true if child is contained within element 948Element.isParent = function(child, element) { 949 if (!child.parentNode || child == element) return false; 950 if (child.parentNode == element) return true; 951 return Element.isParent(child.parentNode, element); 952}; 953 954Element.findChildren = function(element, only, recursive, tagName) { 955 if(!element.hasChildNodes()) return null; 956 tagName = tagName.toUpperCase(); 957 if(only) only = [only].flatten(); 958 var elements = []; 959 $A(element.childNodes).each( function(e) { 960 if(e.tagName && e.tagName.toUpperCase()==tagName && 961 (!only || (Element.classNames(e).detect(function(v) { return only.include(v) })))) 962 elements.push(e); 963 if(recursive) { 964 var grandchildren = Element.findChildren(e, only, recursive, tagName); 965 if(grandchildren) elements.push(grandchildren); 966 } 967 }); 968 969 return (elements.length>0 ? elements.flatten() : []); 970}; 971 972Element.offsetSize = function (element, type) { 973 return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')]; 974};