1// script.aculo.us dragdrop.js v1.7.0, Fri Jan 19 19:16:36 CET 2007 2 3// Copyright (c) 2005, 2006 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) 4// (c) 2005, 2006 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz) 5// 6// script.aculo.us is freely distributable under the terms of an MIT-style license. 7// For details, see the script.aculo.us web site: http://script.aculo.us/ 8 9if(typeof Effect == 'undefined') 10 throw("dragdrop.js requires including script.aculo.us' effects.js library"); 11 12var Droppables = { 13 drops: [], 14 15 remove: function(element) { 16 this.drops = this.drops.reject(function(d) { return d.element==$(element) }); 17 }, 18 19 add: function(element) { 20 element = $(element); 21 var options = Object.extend({ 22 greedy: true, 23 hoverclass: null, 24 tree: false 25 }, arguments[1] || {}); 26 27 // cache containers 28 if(options.containment) { 29 options._containers = []; 30 var containment = options.containment; 31 if((typeof containment == 'object') && 32 (containment.constructor == Array)) { 33 containment.each( function(c) { options._containers.push($(c)) }); 34 } else { 35 options._containers.push($(containment)); 36 } 37 } 38 39 if(options.accept) options.accept = [options.accept].flatten(); 40 41 Element.makePositioned(element); // fix IE 42 options.element = element; 43 44 this.drops.push(options); 45 }, 46 47 findDeepestChild: function(drops) { 48 deepest = drops[0]; 49 50 for (i = 1; i < drops.length; ++i) 51 if (Element.isParent(drops[i].element, deepest.element)) 52 deepest = drops[i]; 53 54 return deepest; 55 }, 56 57 isContained: function(element, drop) { 58 var containmentNode; 59 if(drop.tree) { 60 containmentNode = element.treeNode; 61 } else { 62 containmentNode = element.parentNode; 63 } 64 return drop._containers.detect(function(c) { return containmentNode == c }); 65 }, 66 67 isAffected: function(point, element, drop) { 68 return ( 69 (drop.element!=element) && 70 ((!drop._containers) || 71 this.isContained(element, drop)) && 72 ((!drop.accept) || 73 (Element.classNames(element).detect( 74 function(v) { return drop.accept.include(v) } ) )) && 75 Position.within(drop.element, point[0], point[1]) ); 76 }, 77 78 deactivate: function(drop) { 79 if(drop.hoverclass) 80 Element.removeClassName(drop.element, drop.hoverclass); 81 this.last_active = null; 82 }, 83 84 activate: function(drop) { 85 if(drop.hoverclass) 86 Element.addClassName(drop.element, drop.hoverclass); 87 this.last_active = drop; 88 }, 89 90 show: function(point, element) { 91 if(!this.drops.length) return; 92 var affected = []; 93 94 if(this.last_active) this.deactivate(this.last_active); 95 this.drops.each( function(drop) { 96 if(Droppables.isAffected(point, element, drop)) 97 affected.push(drop); 98 }); 99 100 if(affected.length>0) { 101 drop = Droppables.findDeepestChild(affected); 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 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 }, 118 119 reset: function() { 120 if(this.last_active) 121 this.deactivate(this.last_active); 122 } 123} 124 125var Draggables = { 126 drags: [], 127 observers: [], 128 129 register: function(draggable) { 130 if(this.drags.length == 0) { 131 this.eventMouseUp = this.endDrag.bindAsEventListener(this); 132 this.eventMouseMove = this.updateDrag.bindAsEventListener(this); 133 this.eventKeypress = this.keyPress.bindAsEventListener(this); 134 135 Event.observe(document, "mouseup", this.eventMouseUp); 136 Event.observe(document, "mousemove", this.eventMouseMove); 137 Event.observe(document, "keypress", this.eventKeypress); 138 } 139 this.drags.push(draggable); 140 }, 141 142 unregister: function(draggable) { 143 this.drags = this.drags.reject(function(d) { return d==draggable }); 144 if(this.drags.length == 0) { 145 Event.stopObserving(document, "mouseup", this.eventMouseUp); 146 Event.stopObserving(document, "mousemove", this.eventMouseMove); 147 Event.stopObserving(document, "keypress", this.eventKeypress); 148 } 149 }, 150 151 activate: function(draggable) { 152 if(draggable.options.delay) { 153 this._timeout = setTimeout(function() { 154 Draggables._timeout = null; 155 window.focus(); 156 Draggables.activeDraggable = draggable; 157 }.bind(this), draggable.options.delay); 158 } else { 159 window.focus(); // allows keypress events if window isn't currently focused, fails for Safari 160 this.activeDraggable = draggable; 161 } 162 }, 163 164 deactivate: function() { 165 this.activeDraggable = null; 166 }, 167 168 updateDrag: function(event) { 169 if(!this.activeDraggable) return; 170 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 171 // Mozilla-based browsers fire successive mousemove events with 172 // the same coordinates, prevent needless redrawing (moz bug?) 173 if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return; 174 this._lastPointer = pointer; 175 176 this.activeDraggable.updateDrag(event, pointer); 177 }, 178 179 endDrag: function(event) { 180 if(this._timeout) { 181 clearTimeout(this._timeout); 182 this._timeout = null; 183 } 184 if(!this.activeDraggable) return; 185 this._lastPointer = null; 186 this.activeDraggable.endDrag(event); 187 this.activeDraggable = null; 188 }, 189 190 keyPress: function(event) { 191 if(this.activeDraggable) 192 this.activeDraggable.keyPress(event); 193 }, 194 195 addObserver: function(observer) { 196 this.observers.push(observer); 197 this._cacheObserverCallbacks(); 198 }, 199 200 removeObserver: function(element) { // element instead of observer fixes mem leaks 201 this.observers = this.observers.reject( function(o) { return o.element==element }); 202 this._cacheObserverCallbacks(); 203 }, 204 205 notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag' 206 if(this[eventName+'Count'] > 0) 207 this.observers.each( function(o) { 208 if(o[eventName]) o[eventName](eventName, draggable, event); 209 }); 210 if(draggable.options[eventName]) draggable.options[eventName](draggable, event); 211 }, 212 213 _cacheObserverCallbacks: function() { 214 ['onStart','onEnd','onDrag'].each( function(eventName) { 215 Draggables[eventName+'Count'] = Draggables.observers.select( 216 function(o) { return o[eventName]; } 217 ).length; 218 }); 219 } 220} 221 222/*--------------------------------------------------------------------------*/ 223 224var Draggable = Class.create(); 225Draggable._dragging = {}; 226 227Draggable.prototype = { 228 initialize: function(element) { 229 var defaults = { 230 handle: false, 231 reverteffect: function(element, top_offset, left_offset) { 232 var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02; 233 new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur, 234 queue: {scope:'_draggable', position:'end'} 235 }); 236 }, 237 endeffect: function(element) { 238 var toOpacity = typeof element._opacity == 'number' ? element._opacity : 1.0; 239 new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity, 240 queue: {scope:'_draggable', position:'end'}, 241 afterFinish: function(){ 242 Draggable._dragging[element] = false 243 } 244 }); 245 }, 246 zindex: 1000, 247 revert: 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] || typeof arguments[1].endeffect == 'undefined') 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 && (typeof options.handle == 'string')) 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.delta = this.currentDelta(); 282 this.options = options; 283 this.dragging = false; 284 285 this.eventMouseDown = this.initDrag.bindAsEventListener(this); 286 Event.observe(this.handle, "mousedown", this.eventMouseDown); 287 288 Draggables.register(this); 289 }, 290 291 destroy: function() { 292 Event.stopObserving(this.handle, "mousedown", this.eventMouseDown); 293 Draggables.unregister(this); 294 }, 295 296 currentDelta: function() { 297 return([ 298 parseInt(Element.getStyle(this.element,'left') || '0'), 299 parseInt(Element.getStyle(this.element,'top') || '0')]); 300 }, 301 302 initDrag: function(event) { 303 if(typeof Draggable._dragging[this.element] != 'undefined' && 304 Draggable._dragging[this.element]) return; 305 if(Event.isLeftClick(event)) { 306 // abort on form elements, fixes a Firefox issue 307 var src = Event.element(event); 308 if((tag_name = src.tagName.toUpperCase()) && ( 309 tag_name=='INPUT' || 310 tag_name=='SELECT' || 311 tag_name=='OPTION' || 312 tag_name=='BUTTON' || 313 tag_name=='TEXTAREA')) return; 314 315 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 316 var pos = Position.cumulativeOffset(this.element); 317 this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) }); 318 319 Draggables.activate(this); 320 Event.stop(event); 321 } 322 }, 323 324 startDrag: function(event) { 325 this.dragging = true; 326 327 if(this.options.zindex) { 328 this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0); 329 this.element.style.zIndex = this.options.zindex; 330 } 331 332 if(this.options.ghosting) { 333 this._clone = this.element.cloneNode(true); 334 Position.absolutize(this.element); 335 this.element.parentNode.insertBefore(this._clone, this.element); 336 } 337 338 if(this.options.scroll) { 339 if (this.options.scroll == window) { 340 var where = this._getWindowScroll(this.options.scroll); 341 this.originalScrollLeft = where.left; 342 this.originalScrollTop = where.top; 343 } else { 344 this.originalScrollLeft = this.options.scroll.scrollLeft; 345 this.originalScrollTop = this.options.scroll.scrollTop; 346 } 347 } 348 349 Draggables.notify('onStart', this, event); 350 351 if(this.options.starteffect) this.options.starteffect(this.element); 352 }, 353 354 updateDrag: function(event, pointer) { 355 if(!this.dragging) this.startDrag(event); 356 Position.prepare(); 357 Droppables.show(pointer, this.element); 358 Draggables.notify('onDrag', this, event); 359 360 this.draw(pointer); 361 if(this.options.change) this.options.change(this); 362 363 if(this.options.scroll) { 364 this.stopScrolling(); 365 366 var p; 367 if (this.options.scroll == window) { 368 with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; } 369 } else { 370 p = Position.page(this.options.scroll); 371 p[0] += this.options.scroll.scrollLeft + Position.deltaX; 372 p[1] += this.options.scroll.scrollTop + Position.deltaY; 373 p.push(p[0]+this.options.scroll.offsetWidth); 374 p.push(p[1]+this.options.scroll.offsetHeight); 375 } 376 var speed = [0,0]; 377 if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity); 378 if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity); 379 if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity); 380 if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity); 381 this.startScrolling(speed); 382 } 383 384 // fix AppleWebKit rendering 385 if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0); 386 387 Event.stop(event); 388 }, 389 390 finishDrag: function(event, success) { 391 this.dragging = false; 392 393 if(this.options.ghosting) { 394 Position.relativize(this.element); 395 Element.remove(this._clone); 396 this._clone = null; 397 } 398 399 if(success) Droppables.fire(event, this.element); 400 Draggables.notify('onEnd', this, event); 401 402 var revert = this.options.revert; 403 if(revert && typeof revert == 'function') revert = revert(this.element); 404 405 var d = this.currentDelta(); 406 if(revert && this.options.reverteffect) { 407 this.options.reverteffect(this.element, 408 d[1]-this.delta[1], d[0]-this.delta[0]); 409 } else { 410 this.delta = d; 411 } 412 413 if(this.options.zindex) 414 this.element.style.zIndex = this.originalZ; 415 416 if(this.options.endeffect) 417 this.options.endeffect(this.element); 418 419 Draggables.deactivate(this); 420 Droppables.reset(); 421 }, 422 423 keyPress: function(event) { 424 if(event.keyCode!=Event.KEY_ESC) return; 425 this.finishDrag(event, false); 426 Event.stop(event); 427 }, 428 429 endDrag: function(event) { 430 if(!this.dragging) return; 431 this.stopScrolling(); 432 this.finishDrag(event, true); 433 Event.stop(event); 434 }, 435 436 draw: function(point) { 437 var pos = Position.cumulativeOffset(this.element); 438 if(this.options.ghosting) { 439 var r = Position.realOffset(this.element); 440 pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY; 441 } 442 443 var d = this.currentDelta(); 444 pos[0] -= d[0]; pos[1] -= d[1]; 445 446 if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) { 447 pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft; 448 pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop; 449 } 450 451 var p = [0,1].map(function(i){ 452 return (point[i]-pos[i]-this.offset[i]) 453 }.bind(this)); 454 455 if(this.options.snap) { 456 if(typeof this.options.snap == 'function') { 457 p = this.options.snap(p[0],p[1],this); 458 } else { 459 if(this.options.snap instanceof Array) { 460 p = p.map( function(v, i) { 461 return Math.round(v/this.options.snap[i])*this.options.snap[i] }.bind(this)) 462 } else { 463 p = p.map( function(v) { 464 return Math.round(v/this.options.snap)*this.options.snap }.bind(this)) 465 } 466 }} 467 468 var style = this.element.style; 469 if((!this.options.constraint) || (this.options.constraint=='horizontal')) 470 style.left = p[0] + "px"; 471 if((!this.options.constraint) || (this.options.constraint=='vertical')) 472 style.top = p[1] + "px"; 473 474 if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering 475 }, 476 477 stopScrolling: function() { 478 if(this.scrollInterval) { 479 clearInterval(this.scrollInterval); 480 this.scrollInterval = null; 481 Draggables._lastScrollPointer = null; 482 } 483 }, 484 485 startScrolling: function(speed) { 486 if(!(speed[0] || speed[1])) return; 487 this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed]; 488 this.lastScrolled = new Date(); 489 this.scrollInterval = setInterval(this.scroll.bind(this), 10); 490 }, 491 492 scroll: function() { 493 var current = new Date(); 494 var delta = current - this.lastScrolled; 495 this.lastScrolled = current; 496 if(this.options.scroll == window) { 497 with (this._getWindowScroll(this.options.scroll)) { 498 if (this.scrollSpeed[0] || this.scrollSpeed[1]) { 499 var d = delta / 1000; 500 this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] ); 501 } 502 } 503 } else { 504 this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000; 505 this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000; 506 } 507 508 Position.prepare(); 509 Droppables.show(Draggables._lastPointer, this.element); 510 Draggables.notify('onDrag', this); 511 if (this._isScrollChild) { 512 Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer); 513 Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000; 514 Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000; 515 if (Draggables._lastScrollPointer[0] < 0) 516 Draggables._lastScrollPointer[0] = 0; 517 if (Draggables._lastScrollPointer[1] < 0) 518 Draggables._lastScrollPointer[1] = 0; 519 this.draw(Draggables._lastScrollPointer); 520 } 521 522 if(this.options.change) this.options.change(this); 523 }, 524 525 _getWindowScroll: function(w) { 526 var T, L, W, H; 527 with (w.document) { 528 if (w.document.documentElement && documentElement.scrollTop) { 529 T = documentElement.scrollTop; 530 L = documentElement.scrollLeft; 531 } else if (w.document.body) { 532 T = body.scrollTop; 533 L = body.scrollLeft; 534 } 535 if (w.innerWidth) { 536 W = w.innerWidth; 537 H = w.innerHeight; 538 } else if (w.document.documentElement && documentElement.clientWidth) { 539 W = documentElement.clientWidth; 540 H = documentElement.clientHeight; 541 } else { 542 W = body.offsetWidth; 543 H = body.offsetHeight 544 } 545 } 546 return { top: T, left: L, width: W, height: H }; 547 } 548} 549 550/*--------------------------------------------------------------------------*/ 551 552var SortableObserver = Class.create(); 553SortableObserver.prototype = { 554 initialize: function(element, observer) { 555 this.element = $(element); 556 this.observer = observer; 557 this.lastValue = Sortable.serialize(this.element); 558 }, 559 560 onStart: function() { 561 this.lastValue = Sortable.serialize(this.element); 562 }, 563 564 onEnd: function() { 565 Sortable.unmark(); 566 if(this.lastValue != Sortable.serialize(this.element)) 567 this.observer(this.element) 568 } 569} 570 571var Sortable = { 572 SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/, 573 574 sortables: {}, 575 576 _findRootElement: function(element) { 577 while (element.tagName.toUpperCase() != "BODY") { 578 if(element.id && Sortable.sortables[element.id]) return element; 579 element = element.parentNode; 580 } 581 }, 582 583 options: function(element) { 584 element = Sortable._findRootElement($(element)); 585 if(!element) return; 586 return Sortable.sortables[element.id]; 587 }, 588 589 destroy: function(element){ 590 var s = Sortable.options(element); 591 592 if(s) { 593 Draggables.removeObserver(s.element); 594 s.droppables.each(function(d){ Droppables.remove(d) }); 595 s.draggables.invoke('destroy'); 596 597 delete Sortable.sortables[s.element.id]; 598 } 599 }, 600 601 create: function(element) { 602 element = $(element); 603 var options = Object.extend({ 604 element: element, 605 tag: 'li', // assumes li children, override with tag: 'tagname' 606 dropOnEmpty: false, 607 tree: false, 608 treeTag: 'ul', 609 overlap: 'vertical', // one of 'vertical', 'horizontal' 610 constraint: 'vertical', // one of 'vertical', 'horizontal', false 611 containment: element, // also takes array of elements (or id's); or false 612 handle: false, // or a CSS class 613 only: false, 614 delay: 0, 615 hoverclass: null, 616 ghosting: false, 617 scroll: false, 618 scrollSensitivity: 20, 619 scrollSpeed: 15, 620 format: this.SERIALIZE_RULE, 621 onChange: Prototype.emptyFunction, 622 onUpdate: Prototype.emptyFunction 623 }, arguments[1] || {}); 624 625 // clear any old sortable with same element 626 this.destroy(element); 627 628 // build options for the draggables 629 var options_for_draggable = { 630 revert: true, 631 scroll: options.scroll, 632 scrollSpeed: options.scrollSpeed, 633 scrollSensitivity: options.scrollSensitivity, 634 delay: options.delay, 635 ghosting: options.ghosting, 636 constraint: options.constraint, 637 handle: options.handle }; 638 639 if(options.starteffect) 640 options_for_draggable.starteffect = options.starteffect; 641 642 if(options.reverteffect) 643 options_for_draggable.reverteffect = options.reverteffect; 644 else 645 if(options.ghosting) options_for_draggable.reverteffect = function(element) { 646 element.style.top = 0; 647 element.style.left = 0; 648 }; 649 650 if(options.endeffect) 651 options_for_draggable.endeffect = options.endeffect; 652 653 if(options.zindex) 654 options_for_draggable.zindex = options.zindex; 655 656 // build options for the droppables 657 var options_for_droppable = { 658 overlap: options.overlap, 659 containment: options.containment, 660 tree: options.tree, 661 hoverclass: options.hoverclass, 662 onHover: Sortable.onHover 663 } 664 665 var options_for_tree = { 666 onHover: Sortable.onEmptyHover, 667 overlap: options.overlap, 668 containment: options.containment, 669 hoverclass: options.hoverclass 670 } 671 672 // fix for gecko engine 673 Element.cleanWhitespace(element); 674 675 options.draggables = []; 676 options.droppables = []; 677 678 // drop on empty handling 679 if(options.dropOnEmpty || options.tree) { 680 Droppables.add(element, options_for_tree); 681 options.droppables.push(element); 682 } 683 684 (this.findElements(element, options) || []).each( function(e) { 685 // handles are per-draggable 686 var handle = options.handle ? 687 $(e).down('.'+options.handle,0) : e; 688 options.draggables.push( 689 new Draggable(e, Object.extend(options_for_draggable, { handle: handle }))); 690 Droppables.add(e, options_for_droppable); 691 if(options.tree) e.treeNode = element; 692 options.droppables.push(e); 693 }); 694 695 if(options.tree) { 696 (Sortable.findTreeElements(element, options) || []).each( function(e) { 697 Droppables.add(e, options_for_tree); 698 e.treeNode = element; 699 options.droppables.push(e); 700 }); 701 } 702 703 // keep reference 704 this.sortables[element.id] = options; 705 706 // for onupdate 707 Draggables.addObserver(new SortableObserver(element, options.onUpdate)); 708 709 }, 710 711 // return all suitable-for-sortable elements in a guaranteed order 712 findElements: function(element, options) { 713 return Element.findChildren( 714 element, options.only, options.tree ? true : false, options.tag); 715 }, 716 717 findTreeElements: function(element, options) { 718 return Element.findChildren( 719 element, options.only, options.tree ? true : false, options.treeTag); 720 }, 721 722 onHover: function(element, dropon, overlap) { 723 if(Element.isParent(dropon, element)) return; 724 725 if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) { 726 return; 727 } else if(overlap>0.5) { 728 Sortable.mark(dropon, 'before'); 729 if(dropon.previousSibling != element) { 730 var oldParentNode = element.parentNode; 731 element.style.visibility = "hidden"; // fix gecko rendering 732 dropon.parentNode.insertBefore(element, dropon); 733 if(dropon.parentNode!=oldParentNode) 734 Sortable.options(oldParentNode).onChange(element); 735 Sortable.options(dropon.parentNode).onChange(element); 736 } 737 } else { 738 Sortable.mark(dropon, 'after'); 739 var nextElement = dropon.nextSibling || null; 740 if(nextElement != element) { 741 var oldParentNode = element.parentNode; 742 element.style.visibility = "hidden"; // fix gecko rendering 743 dropon.parentNode.insertBefore(element, nextElement); 744 if(dropon.parentNode!=oldParentNode) 745 Sortable.options(oldParentNode).onChange(element); 746 Sortable.options(dropon.parentNode).onChange(element); 747 } 748 } 749 }, 750 751 onEmptyHover: function(element, dropon, overlap) { 752 var oldParentNode = element.parentNode; 753 var droponOptions = Sortable.options(dropon); 754 755 if(!Element.isParent(dropon, element)) { 756 var index; 757 758 var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only}); 759 var child = null; 760 761 if(children) { 762 var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap); 763 764 for (index = 0; index < children.length; index += 1) { 765 if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) { 766 offset -= Element.offsetSize (children[index], droponOptions.overlap); 767 } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) { 768 child = index + 1 < children.length ? children[index + 1] : null; 769 break; 770 } else { 771 child = children[index]; 772 break; 773 } 774 } 775 } 776 777 dropon.insertBefore(element, child); 778 779 Sortable.options(oldParentNode).onChange(element); 780 droponOptions.onChange(element); 781 } 782 }, 783 784 unmark: function() { 785 if(Sortable._marker) Sortable._marker.hide(); 786 }, 787 788 mark: function(dropon, position) { 789 // mark on ghosting only 790 var sortable = Sortable.options(dropon.parentNode); 791 if(sortable && !sortable.ghosting) return; 792 793 if(!Sortable._marker) { 794 Sortable._marker = 795 ($('dropmarker') || Element.extend(document.createElement('DIV'))). 796 hide().addClassName('dropmarker').setStyle({position:'absolute'}); 797 document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); 798 } 799 var offsets = Position.cumulativeOffset(dropon); 800 Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'}); 801 802 if(position=='after') 803 if(sortable.overlap == 'horizontal') 804 Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'}); 805 else 806 Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'}); 807 808 Sortable._marker.show(); 809 }, 810 811 _tree: function(element, options, parent) { 812 var children = Sortable.findElements(element, options) || []; 813 814 for (var i = 0; i < children.length; ++i) { 815 var match = children[i].id.match(options.format); 816 817 if (!match) continue; 818 819 var child = { 820 id: encodeURIComponent(match ? match[1] : null), 821 element: element, 822 parent: parent, 823 children: [], 824 position: parent.children.length, 825 container: $(children[i]).down(options.treeTag) 826 } 827 828 /* Get the element containing the children and recurse over it */ 829 if (child.container) 830 this._tree(child.container, options, child) 831 832 parent.children.push (child); 833 } 834 835 return parent; 836 }, 837 838 tree: function(element) { 839 element = $(element); 840 var sortableOptions = this.options(element); 841 var options = Object.extend({ 842 tag: sortableOptions.tag, 843 treeTag: sortableOptions.treeTag, 844 only: sortableOptions.only, 845 name: element.id, 846 format: sortableOptions.format 847 }, arguments[1] || {}); 848 849 var root = { 850 id: null, 851 parent: null, 852 children: [], 853 container: element, 854 position: 0 855 } 856 857 return Sortable._tree(element, options, root); 858 }, 859 860 /* Construct a [i] index for a particular node */ 861 _constructIndex: function(node) { 862 var index = ''; 863 do { 864 if (node.id) index = '[' + node.position + ']' + index; 865 } while ((node = node.parent) != null); 866 return index; 867 }, 868 869 sequence: function(element) { 870 element = $(element); 871 var options = Object.extend(this.options(element), arguments[1] || {}); 872 873 return $(this.findElements(element, options) || []).map( function(item) { 874 return item.id.match(options.format) ? item.id.match(options.format)[1] : ''; 875 }); 876 }, 877 878 setSequence: function(element, new_sequence) { 879 element = $(element); 880 var options = Object.extend(this.options(element), arguments[2] || {}); 881 882 var nodeMap = {}; 883 this.findElements(element, options).each( function(n) { 884 if (n.id.match(options.format)) 885 nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode]; 886 n.parentNode.removeChild(n); 887 }); 888 889 new_sequence.each(function(ident) { 890 var n = nodeMap[ident]; 891 if (n) { 892 n[1].appendChild(n[0]); 893 delete nodeMap[ident]; 894 } 895 }); 896 }, 897 898 serialize: function(element) { 899 element = $(element); 900 var options = Object.extend(Sortable.options(element), arguments[1] || {}); 901 var name = encodeURIComponent( 902 (arguments[1] && arguments[1].name) ? arguments[1].name : element.id); 903 904 if (options.tree) { 905 return Sortable.tree(element, arguments[1]).children.map( function (item) { 906 return [name + Sortable._constructIndex(item) + "[id]=" + 907 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee)); 908 }).flatten().join('&'); 909 } else { 910 return Sortable.sequence(element, arguments[1]).map( function(item) { 911 return name + "[]=" + encodeURIComponent(item); 912 }).join('&'); 913 } 914 } 915} 916 917// Returns true if child is contained within element 918Element.isParent = function(child, element) { 919 if (!child.parentNode || child == element) return false; 920 if (child.parentNode == element) return true; 921 return Element.isParent(child.parentNode, element); 922} 923 924Element.findChildren = function(element, only, recursive, tagName) { 925 if(!element.hasChildNodes()) return null; 926 tagName = tagName.toUpperCase(); 927 if(only) only = [only].flatten(); 928 var elements = []; 929 $A(element.childNodes).each( function(e) { 930 if(e.tagName && e.tagName.toUpperCase()==tagName && 931 (!only || (Element.classNames(e).detect(function(v) { return only.include(v) })))) 932 elements.push(e); 933 if(recursive) { 934 var grandchildren = Element.findChildren(e, only, recursive, tagName); 935 if(grandchildren) elements.push(grandchildren); 936 } 937 }); 938 939 return (elements.length>0 ? elements.flatten() : []); 940} 941 942Element.offsetSize = function (element, type) { 943 return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')]; 944} 945