1// Copyright (c) 2005-2008 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) 2// (c) 2005-2008 Sammi Williams (http://www.oriontransfer.co.nz, [email protected]) 3// 4// script.aculo.us is freely distributable under the terms of an MIT-style license. 5// For details, see the script.aculo.us web site: http://script.aculo.us/ 6 7if(Object.isUndefined(Effect)) 8 throw("dragdrop.js requires including script.aculo.us' effects.js library"); 9 10var Droppables = { 11 drops: [], 12 13 remove: function(element) { 14 this.drops = this.drops.reject(function(d) { return d.element==$(element) }); 15 }, 16 17 add: function(element) { 18 element = $(element); 19 var options = Object.extend({ 20 greedy: true, 21 hoverclass: null, 22 tree: false 23 }, arguments[1] || { }); 24 25 // cache containers 26 if(options.containment) { 27 options._containers = []; 28 var containment = options.containment; 29 if(Object.isArray(containment)) { 30 containment.each( function(c) { options._containers.push($(c)) }); 31 } else { 32 options._containers.push($(containment)); 33 } 34 } 35 36 if(options.accept) options.accept = [options.accept].flatten(); 37 38 Element.makePositioned(element); // fix IE 39 options.element = element; 40 41 this.drops.push(options); 42 }, 43 44 findDeepestChild: function(drops) { 45 deepest = drops[0]; 46 47 for (i = 1; i < drops.length; ++i) 48 if (Element.isParent(drops[i].element, deepest.element)) 49 deepest = drops[i]; 50 51 return deepest; 52 }, 53 54 isContained: function(element, drop) { 55 var containmentNode; 56 if(drop.tree) { 57 containmentNode = element.treeNode; 58 } else { 59 containmentNode = element.parentNode; 60 } 61 return drop._containers.detect(function(c) { return containmentNode == c }); 62 }, 63 64 isAffected: function(point, element, drop) { 65 return ( 66 (drop.element!=element) && 67 ((!drop._containers) || 68 this.isContained(element, drop)) && 69 ((!drop.accept) || 70 (Element.classNames(element).detect( 71 function(v) { return drop.accept.include(v) } ) )) && 72 Position.within(drop.element, point[0], point[1]) ); 73 }, 74 75 deactivate: function(drop) { 76 if(drop.hoverclass) 77 Element.removeClassName(drop.element, drop.hoverclass); 78 this.last_active = null; 79 }, 80 81 activate: function(drop) { 82 if(drop.hoverclass) 83 Element.addClassName(drop.element, drop.hoverclass); 84 this.last_active = drop; 85 }, 86 87 show: function(point, element) { 88 if(!this.drops.length) return; 89 var drop, affected = []; 90 91 this.drops.each( function(drop) { 92 if(Droppables.isAffected(point, element, drop)) 93 affected.push(drop); 94 }); 95 96 if(affected.length>0) 97 drop = Droppables.findDeepestChild(affected); 98 99 if(this.last_active && this.last_active != drop) this.deactivate(this.last_active); 100 if (drop) { 101 Position.within(drop.element, point[0], point[1]); 102 if(drop.onHover) 103 drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element)); 104 105 if (drop != this.last_active) Droppables.activate(drop); 106 } 107 }, 108 109 fire: function(event, element) { 110 if(!this.last_active) return; 111 Position.prepare(); 112 113 if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active)) 114 if (this.last_active.onDrop) { 115 this.last_active.onDrop(element, this.last_active.element, event); 116 return true; 117 } 118 }, 119 120 reset: function() { 121 if(this.last_active) 122 this.deactivate(this.last_active); 123 } 124}; 125 126var Draggables = { 127 drags: [], 128 observers: [], 129 130 register: function(draggable) { 131 if(this.drags.length == 0) { 132 this.eventMouseUp = this.endDrag.bindAsEventListener(this); 133 this.eventMouseMove = this.updateDrag.bindAsEventListener(this); 134 this.eventKeypress = this.keyPress.bindAsEventListener(this); 135 136 Event.observe(document, "mouseup", this.eventMouseUp); 137 Event.observe(document, "mousemove", this.eventMouseMove); 138 Event.observe(document, "keypress", this.eventKeypress); 139 } 140 this.drags.push(draggable); 141 }, 142 143 unregister: function(draggable) { 144 this.drags = this.drags.reject(function(d) { return d==draggable }); 145 if(this.drags.length == 0) { 146 Event.stopObserving(document, "mouseup", this.eventMouseUp); 147 Event.stopObserving(document, "mousemove", this.eventMouseMove); 148 Event.stopObserving(document, "keypress", this.eventKeypress); 149 } 150 }, 151 152 activate: function(draggable) {
153 if(draggable.options.delay) { 154 this._timeout = setTimeout(function() { 155 Draggables._timeout = null; 156 window.focus(); 157 Draggables.activeDraggable = draggable; 158 }.bind(this), draggable.options.delay); 159 } else { 160 window.focus(); // allows keypress events if window isn't currently focused, fails for Safari 161 this.activeDraggable = draggable; 162 } 163 }, 164 165 deactivate: function() { 166 this.activeDraggable = null; 167 }, 168 169 updateDrag: function(event) { 170 if(!this.activeDraggable) return; 171 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 172 // Mozilla-based browsers fire successive mousemove events with 173 // the same coordinates, prevent needless redrawing (moz bug?) 174 if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return; 175 this._lastPointer = pointer; 176 177 this.activeDraggable.updateDrag(event, pointer); 178 }, 179 180 endDrag: function(event) { 181 if(this._timeout) { 182 clearTimeout(this._timeout); 183 this._timeout = null; 184 } 185 if(!this.activeDraggable) return; 186 this._lastPointer = null; 187 this.activeDraggable.endDrag(event); 188 this.activeDraggable = null; 189 }, 190 191 keyPress: function(event) { 192 if(this.activeDraggable) 193 this.activeDraggable.keyPress(event); 194 }, 195 196 addObserver: function(observer) { 197 this.observers.push(observer); 198 this._cacheObserverCallbacks(); 199 }, 200 201 removeObserver: function(element) { // element instead of observer fixes mem leaks 202 this.observers = this.observers.reject( function(o) { return o.element==element }); 203 this._cacheObserverCallbacks(); 204 }, 205 206 notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag' 207 if(this[eventName+'Count'] > 0) 208 this.observers.each( function(o) { 209 if(o[eventName]) o[eventName](eventName, draggable, event); 210 }); 211 if(draggable.options[eventName]) draggable.options[eventName](draggable, event); 212 }, 213 214 _cacheObserverCallbacks: function() { 215 ['onStart','onEnd','onDrag'].each( function(eventName) { 216 Draggables[eventName+'Count'] = Draggables.observers.select( 217 function(o) { return o[eventName]; } 218 ).length; 219 }); 220 } 221}; 222 223/*--------------------------------------------------------------------------*/ 224 225var Draggable = Class.create({ 226 initialize: function(element) { 227 var defaults = { 228 handle: false, 229 reverteffect: function(element, top_offset, left_offset) { 230 var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02; 231 new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur, 232 queue: {scope:'_draggable', position:'end'} 233 }); 234 }, 235 endeffect: function(element) { 236 var toOpacity = Object.isNumber(element._opacity) ? element._opacity : 1.0; 237 new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity, 238 queue: {scope:'_draggable', position:'end'}, 239 afterFinish: function(){ 240 Draggable._dragging[element] = false 241 } 242 }); 243 }, 244 zindex: 1000, 245 revert: false, 246 quiet: false, 247 scroll: false, 248 scrollSensitivity: 20, 249 scrollSpeed: 15, 250 snap: false, // false, or xy or [x,y] or function(x,y){ return [x,y] } 251 delay: 0 252 }; 253 254 if(!arguments[1] || Object.isUndefined(arguments[1].endeffect)) 255 Object.extend(defaults, { 256 starteffect: function(element) { 257 element._opacity = Element.getOpacity(element); 258 Draggable._dragging[element] = true; 259 new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7}); 260 } 261 }); 262 263 var options = Object.extend(defaults, arguments[1] || { }); 264 265 this.element = $(element); 266 267 if(options.handle && Object.isString(options.handle)) 268 this.handle = this.element.down('.'+options.handle, 0); 269 270 if(!this.handle) this.handle = $(options.handle); 271 if(!this.handle) this.handle = this.element; 272 273 if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) { 274 options.scroll = $(options.scroll); 275 this._isScrollChild = Element.childOf(this.element, options.scroll); 276 } 277 278 Element.makePositioned(this.element); // fix IE 279 280 this.options = options; 281 this.dragging = false;
282 283 this.eventMouseDown = this.initDrag.bindAsEventListener(this); 284 Event.observe(this.handle, "mousedown", this.eventMouseDown); 285 286 Draggables.register(this); 287 }, 288 289 destroy: function() { 290 Event.stopObserving(this.handle, "mousedown", this.eventMouseDown); 291 Draggables.unregister(this); 292 }, 293 294 currentDelta: function() { 295 return([ 296 parseInt(Element.getStyle(this.element,'left') || '0'), 297 parseInt(Element.getStyle(this.element,'top') || '0')]); 298 }, 299 300 initDrag: function(event) { 301 if(!Object.isUndefined(Draggable._dragging[this.element]) && 302 Draggable._dragging[this.element]) return; 303 if(Event.isLeftClick(event)) { 304 // abort on form elements, fixes a Firefox issue 305 var src = Event.element(event); 306 if((tag_name = src.tagName.toUpperCase()) && ( 307 tag_name=='INPUT' || 308 tag_name=='SELECT' || 309 tag_name=='OPTION' || 310 tag_name=='BUTTON' || 311 tag_name=='TEXTAREA')) return; 312 313 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 314 var pos = Position.cumulativeOffset(this.element); 315 this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) }); 316 317 Draggables.activate(this); 318 Event.stop(event); 319 } 320 }, 321 322 startDrag: function(event) { 323 this.dragging = true; 324 if(!this.delta) 325 this.delta = this.currentDelta(); 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 this._originallyAbsolute = (this.element.getStyle('position') == 'absolute'); 335 if (!this._originallyAbsolute) 336 Position.absolutize(this.element); 337 this.element.parentNode.insertBefore(this._clone, this.element); 338 } 339 340 if(this.options.scroll) { 341 if (this.options.scroll == window) { 342 var where = this._getWindowScroll(this.options.scroll); 343 this.originalScrollLeft = where.left; 344 this.originalScrollTop = where.top; 345 } else { 346 this.originalScrollLeft = this.options.scroll.scrollLeft; 347 this.originalScrollTop = this.options.scroll.scrollTop; 348 } 349 } 350 351 Draggables.notify('onStart', this, event); 352 353 if(this.options.starteffect) this.options.starteffect(this.element); 354 }, 355 356 updateDrag: function(event, pointer) { 357 if(!this.dragging) this.startDrag(event); 358 359 if(!this.options.quiet){ 360 Position.prepare(); 361 Droppables.show(pointer, this.element); 362 } 363 364 Draggables.notify('onDrag', this, event); 365 366 this.draw(pointer); 367 if(this.options.change) this.options.change(this); 368 369 if(this.options.scroll) { 370 this.stopScrolling(); 371 372 var p; 373 if (this.options.scroll == window) { 374 with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; } 375 } else { 376 p = Position.page(this.options.scroll); 377 p[0] += this.options.scroll.scrollLeft + Position.deltaX; 378 p[1] += this.options.scroll.scrollTop + Position.deltaY; 379 p.push(p[0]+this.options.scroll.offsetWidth); 380 p.push(p[1]+this.options.scroll.offsetHeight); 381 } 382 var speed = [0,0]; 383 if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity); 384 if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity); 385 if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity); 386 if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity); 387 this.startScrolling(speed); 388 } 389 390 // fix AppleWebKit rendering 391 if(Prototype.Browser.WebKit) window.scrollBy(0,0); 392 393 Event.stop(event); 394 }, 395 396 finishDrag: function(event, success) { 397 this.dragging = false; 398 399 if(this.options.quiet){ 400 Position.prepare(); 401 var pointer = [Event.pointerX(event), Event.pointerY(event)]; 402 Droppables.show(pointer, this.element); 403 } 404 405 if(this.options.ghosting) { 406 if (!this._originallyAbsolute) 407 Position.relativize(this.element); 408 delete this._originallyAbsolute; 409 Element.remove(this._clone); 410 this._clone = null; 411 } 412 413 var dropped = false;
414 if(success) { 415 dropped = Droppables.fire(event, this.element); 416 if (!dropped) dropped = false; 417 } 418 if(dropped && this.options.onDropped) this.options.onDropped(this.element); 419 Draggables.notify('onEnd', this, event); 420 421 var revert = this.options.revert; 422 if(revert && Object.isFunction(revert)) revert = revert(this.element); 423 424 var d = this.currentDelta(); 425 if(revert && this.options.reverteffect) { 426 if (dropped == 0 || revert != 'failure') 427 this.options.reverteffect(this.element, 428 d[1]-this.delta[1], d[0]-this.delta[0]); 429 } else { 430 this.delta = d; 431 } 432 433 if(this.options.zindex) 434 this.element.style.zIndex = this.originalZ; 435 436 if(this.options.endeffect) 437 this.options.endeffect(this.element); 438 439 Draggables.deactivate(this); 440 Droppables.reset(); 441 }, 442 443 keyPress: function(event) { 444 if(event.keyCode!=Event.KEY_ESC) return; 445 this.finishDrag(event, false); 446 Event.stop(event); 447 }, 448 449 endDrag: function(event) { 450 if(!this.dragging) return; 451 this.stopScrolling(); 452 this.finishDrag(event, true); 453 Event.stop(event); 454 }, 455 456 draw: function(point) { 457 var pos = Position.cumulativeOffset(this.element); 458 if(this.options.ghosting) { 459 var r = Position.realOffset(this.element); 460 pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY; 461 } 462 463 var d = this.currentDelta(); 464 pos[0] -= d[0]; pos[1] -= d[1]; 465 466 if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) { 467 pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft; 468 pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop; 469 } 470 471 var p = [0,1].map(function(i){ 472 return (point[i]-pos[i]-this.offset[i]) 473 }.bind(this)); 474 475 if(this.options.snap) { 476 if(Object.isFunction(this.options.snap)) { 477 p = this.options.snap(p[0],p[1],this); 478 } else { 479 if(Object.isArray(this.options.snap)) { 480 p = p.map( function(v, i) { 481 return (v/this.options.snap[i]).round()*this.options.snap[i] }.bind(this)); 482 } else { 483 p = p.map( function(v) { 484 return (v/this.options.snap).round()*this.options.snap }.bind(this)); 485 } 486 }} 487 488 var style = this.element.style; 489 if((!this.options.constraint) || (this.options.constraint=='horizontal')) 490 style.left = p[0] + "px"; 491 if((!this.options.constraint) || (this.options.constraint=='vertical')) 492 style.top = p[1] + "px"; 493 494 if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering 495 }, 496 497 stopScrolling: function() { 498 if(this.scrollInterval) { 499 clearInterval(this.scrollInterval); 500 this.scrollInterval = null; 501 Draggables._lastScrollPointer = null; 502 } 503 }, 504 505 startScrolling: function(speed) { 506 if(!(speed[0] || speed[1])) return; 507 this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed]; 508 this.lastScrolled = new Date(); 509 this.scrollInterval = setInterval(this.scroll.bind(this), 10); 510 }, 511 512 scroll: function() { 513 var current = new Date(); 514 var delta = current - this.lastScrolled; 515 this.lastScrolled = current; 516 if(this.options.scroll == window) { 517 with (this._getWindowScroll(this.options.scroll)) { 518 if (this.scrollSpeed[0] || this.scrollSpeed[1]) { 519 var d = delta / 1000; 520 this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] ); 521 } 522 } 523 } else { 524 this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000; 525 this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000; 526 } 527 528 Position.prepare(); 529 Droppables.show(Draggables._lastPointer, this.element); 530 Draggables.notify('onDrag', this); 531 if (this._isScrollChild) { 532 Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer); 533 Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000; 534 Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000; 535 if (Draggables._lastScrollPointer[0] < 0) 536 Draggables._lastScrollPointer[0] = 0; 537 if (Draggables._lastScrollPointer[1] < 0) 538 Draggables._lastScrollPointer[1] = 0; 539 this.draw(Draggables._lastScrollPointer); 540 } 541 542 if(this.options.change) this.options.change(this); 543 }, 544 545 _getWindowScroll: function(w) { 546 var T, L, W, H; 547 with (w.document) { 548 if (w.document.documentElement && documentElement.scrollTop) { 549 T = documentElement.scrollTop; 550 L = documentElement.scrollLeft; 551 } else if (w.document.body) { 552 T = body.scrollTop; 553 L = body.scrollLeft; 554 } 555 if (w.innerWidth) { 556 W = w.innerWidth; 557 H = w.innerHeight; 558 } else if (w.document.documentElement && documentElement.clientWidth) { 559 W = documentElement.clientWidth; 560 H = documentElement.clientHeight; 561 } else { 562 W = body.offsetWidth; 563 H = body.offsetHeight; 564 } 565 } 566 return { top: T, left: L, width: W, height: H }; 567 } 568}); 569 570Draggable._dragging = { }; 571 572/*--------------------------------------------------------------------------*/ 573 574var SortableObserver = Class.create({ 575 initialize: function(element, observer) { 576 this.element = $(element); 577 this.observer = observer; 578 this.lastValue = Sortable.serialize(this.element); 579 }, 580 581 onStart: function() { 582 this.lastValue = Sortable.serialize(this.element); 583 }, 584 585 onEnd: function() { 586 Sortable.unmark(); 587 if(this.lastValue != Sortable.serialize(this.element)) 588 this.observer(this.element) 589 } 590}); 591 592var Sortable = { 593 SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/, 594 595 sortables: { }, 596 597 _findRootElement: function(element) { 598 while (element.tagName.toUpperCase() != "BODY") {
599 if(element.id && Sortable.sortables[element.id]) return element; 600 element = element.parentNode; 601 } 602 }, 603 604 options: function(element) { 605 element = Sortable._findRootElement($(element)); 606 if(!element) return; 607 return Sortable.sortables[element.id]; 608 }, 609 610 destroy: function(element){ 611 element = $(element); 612 var s = Sortable.sortables[element.id]; 613 614 if(s) { 615 Draggables.removeObserver(s.element); 616 s.droppables.each(function(d){ Droppables.remove(d) }); 617 s.draggables.invoke('destroy'); 618 619 delete Sortable.sortables[s.element.id]; 620 } 621 }, 622 623 create: function(element) { 624 element = $(element); 625 var options = Object.extend({ 626 element: element, 627 tag: 'li', // assumes li children, override with tag: 'tagname' 628 dropOnEmpty: false, 629 tree: false, 630 treeTag: 'ul', 631 overlap: 'vertical', // one of 'vertical', 'horizontal' 632 constraint: 'vertical', // one of 'vertical', 'horizontal', false 633 containment: element, // also takes array of elements (or id's); or false 634 handle: false, // or a CSS class 635 only: false, 636 delay: 0, 637 hoverclass: null, 638 ghosting: false, 639 quiet: false, 640 scroll: false, 641 scrollSensitivity: 20, 642 scrollSpeed: 15, 643 format: this.SERIALIZE_RULE, 644 645 // these take arrays of elements or ids and can be 646 // used for better initialization performance 647 elements: false, 648 handles: false, 649 650 onChange: Prototype.emptyFunction, 651 onUpdate: Prototype.emptyFunction 652 }, arguments[1] || { }); 653 654 // clear any old sortable with same element 655 this.destroy(element); 656 657 // build options for the draggables 658 var options_for_draggable = { 659 revert: true, 660 quiet: options.quiet, 661 scroll: options.scroll, 662 scrollSpeed: options.scrollSpeed, 663 scrollSensitivity: options.scrollSensitivity, 664 delay: options.delay, 665 ghosting: options.ghosting, 666 constraint: options.constraint, 667 handle: options.handle }; 668 669 if(options.starteffect) 670 options_for_draggable.starteffect = options.starteffect; 671 672 if(options.reverteffect) 673 options_for_draggable.reverteffect = options.reverteffect; 674 else 675 if(options.ghosting) options_for_draggable.reverteffect = function(element) { 676 element.style.top = 0; 677 element.style.left = 0; 678 }; 679 680 if(options.endeffect) 681 options_for_draggable.endeffect = options.endeffect; 682 683 if(options.zindex) 684 options_for_draggable.zindex = options.zindex; 685 686 // build options for the droppables 687 var options_for_droppable = { 688 overlap: options.overlap, 689 containment: options.containment, 690 tree: options.tree, 691 hoverclass: options.hoverclass, 692 onHover: Sortable.onHover 693 }; 694 695 var options_for_tree = { 696 onHover: Sortable.onEmptyHover, 697 overlap: options.overlap, 698 containment: options.containment, 699 hoverclass: options.hoverclass 700 }; 701 702 // fix for gecko engine 703 Element.cleanWhitespace(element); 704 705 options.draggables = []; 706 options.droppables = []; 707 708 // drop on empty handling 709 if(options.dropOnEmpty || options.tree) { 710 Droppables.add(element, options_for_tree); 711 options.droppables.push(element); 712 } 713 714 (options.elements || this.findElements(element, options) || []).each( function(e,i) { 715 var handle = options.handles ? $(options.handles[i]) : 716 (options.handle ? $(e).select('.' + options.handle)[0] : e); 717 options.draggables.push( 718 new Draggable(e, Object.extend(options_for_draggable, { handle: handle }))); 719 Droppables.add(e, options_for_droppable); 720 if(options.tree) e.treeNode = element; 721 options.droppables.push(e); 722 }); 723 724 if(options.tree) { 725 (Sortable.findTreeElements(element, options) || []).each( function(e) { 726 Droppables.add(e, options_for_tree); 727 e.treeNode = element; 728 options.droppables.push(e); 729 }); 730 } 731 732 // keep reference
733 this.sortables[element.id] = options; 734 735 // for onupdate 736 Draggables.addObserver(new SortableObserver(element, options.onUpdate)); 737 738 }, 739 740 // return all suitable-for-sortable elements in a guaranteed order 741 findElements: function(element, options) { 742 return Element.findChildren( 743 element, options.only, options.tree ? true : false, options.tag); 744 }, 745 746 findTreeElements: function(element, options) { 747 return Element.findChildren( 748 element, options.only, options.tree ? true : false, options.treeTag); 749 }, 750 751 onHover: function(element, dropon, overlap) { 752 if(Element.isParent(dropon, element)) return; 753 754 if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) { 755 return; 756 } else if(overlap>0.5) { 757 Sortable.mark(dropon, 'before'); 758 if(dropon.previousSibling != element) { 759 var oldParentNode = element.parentNode; 760 element.style.visibility = "hidden"; // fix gecko rendering 761 dropon.parentNode.insertBefore(element, dropon); 762 if(dropon.parentNode!=oldParentNode) 763 Sortable.options(oldParentNode).onChange(element); 764 Sortable.options(dropon.parentNode).onChange(element); 765 } 766 } else { 767 Sortable.mark(dropon, 'after'); 768 var nextElement = dropon.nextSibling || null; 769 if(nextElement != element) { 770 var oldParentNode = element.parentNode; 771 element.style.visibility = "hidden"; // fix gecko rendering 772 dropon.parentNode.insertBefore(element, nextElement); 773 if(dropon.parentNode!=oldParentNode) 774 Sortable.options(oldParentNode).onChange(element); 775 Sortable.options(dropon.parentNode).onChange(element); 776 } 777 } 778 }, 779 780 onEmptyHover: function(element, dropon, overlap) { 781 var oldParentNode = element.parentNode; 782 var droponOptions = Sortable.options(dropon); 783 784 if(!Element.isParent(dropon, element)) { 785 var index; 786 787 var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only}); 788 var child = null; 789 790 if(children) { 791 var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap); 792 793 for (index = 0; index < children.length; index += 1) { 794 if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) { 795 offset -= Element.offsetSize (children[index], droponOptions.overlap); 796 } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) { 797 child = index + 1 < children.length ? children[index + 1] : null; 798 break; 799 } else { 800 child = children[index]; 801 break; 802 } 803 } 804 } 805 806 dropon.insertBefore(element, child); 807 808 Sortable.options(oldParentNode).onChange(element); 809 droponOptions.onChange(element); 810 } 811 }, 812 813 unmark: function() { 814 if(Sortable._marker) Sortable._marker.hide(); 815 }, 816 817 mark: function(dropon, position) { 818 // mark on ghosting only 819 var sortable = Sortable.options(dropon.parentNode); 820 if(sortable && !sortable.ghosting) return; 821 822 if(!Sortable._marker) { 823 Sortable._marker = 824 ($('dropmarker') || Element.extend(document.createElement('DIV'))). 825 hide().addClassName('dropmarker').setStyle({position:'absolute'}); 826 document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); 827 } 828 var offsets = Position.cumulativeOffset(dropon); 829 Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'}); 830 831 if(position=='after') 832 if(sortable.overlap == 'horizontal') 833 Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'}); 834 else 835 Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'}); 836 837 Sortable._marker.show(); 838 }, 839 840 _tree: function(element, options, parent) { 841 var children = Sortable.findElements(element, options) || []; 842 843 for (var i = 0; i < children.length; ++i) { 844 var match = children[i].id.match(options.format); 845 846 if (!match) continue; 847 848 var child = { 849 id: encodeURIComponent(match ? match[1] : null),
850 element: element, 851 parent: parent, 852 children: [], 853 position: parent.children.length, 854 container: $(children[i]).down(options.treeTag) 855 }; 856 857 /* Get the element containing the children and recurse over it */ 858 if (child.container) 859 this._tree(child.container, options, child); 860 861 parent.children.push (child); 862 } 863 864 return parent; 865 }, 866 867 tree: function(element) { 868 element = $(element); 869 var sortableOptions = this.options(element); 870 var options = Object.extend({ 871 tag: sortableOptions.tag, 872 treeTag: sortableOptions.treeTag, 873 only: sortableOptions.only, 874 name: element.id, 875 format: sortableOptions.format 876 }, arguments[1] || { }); 877 878 var root = { 879 id: null, 880 parent: null, 881 children: [], 882 container: element, 883 position: 0 884 }; 885 886 return Sortable._tree(element, options, root); 887 }, 888 889 /* Construct a [i] index for a particular node */ 890 _constructIndex: function(node) { 891 var index = ''; 892 do { 893 if (node.id) index = '[' + node.position + ']' + index; 894 } while ((node = node.parent) != null); 895 return index; 896 }, 897 898 sequence: function(element) { 899 element = $(element); 900 var options = Object.extend(this.options(element), arguments[1] || { }); 901 902 return $(this.findElements(element, options) || []).map( function(item) { 903 return item.id.match(options.format) ? item.id.match(options.format)[1] : ''; 904 }); 905 }, 906 907 setSequence: function(element, new_sequence) { 908 element = $(element); 909 var options = Object.extend(this.options(element), arguments[2] || { }); 910 911 var nodeMap = { }; 912 this.findElements(element, options).each( function(n) { 913 if (n.id.match(options.format)) 914 nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode]; 915 n.parentNode.removeChild(n); 916 }); 917 918 new_sequence.each(function(ident) { 919 var n = nodeMap[ident]; 920 if (n) { 921 n[1].appendChild(n[0]); 922 delete nodeMap[ident]; 923 } 924 }); 925 }, 926 927 serialize: function(element) { 928 element = $(element); 929 var options = Object.extend(Sortable.options(element), arguments[1] || { }); 930 var name = encodeURIComponent( 931 (arguments[1] && arguments[1].name) ? arguments[1].name : element.id); 932 933 if (options.tree) { 934 return Sortable.tree(element, arguments[1]).children.map( function (item) { 935 return [name + Sortable._constructIndex(item) + "[id]=" + 936 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee)); 937 }).flatten().join('&'); 938 } else { 939 return Sortable.sequence(element, arguments[1]).map( function(item) { 940 return name + "[]=" + encodeURIComponent(item); 941 }).join('&'); 942 } 943 } 944}; 945 946// Returns true if child is contained within element 947Element.isParent = function(child, element) { 948 if (!child.parentNode || child == element) return false; 949 if (child.parentNode == element) return true; 950 return Element.isParent(child.parentNode, element); 951}; 952 953Element.findChildren = function(element, only, recursive, tagName) { 954 if(!element.hasChildNodes()) return null; 955 tagName = tagName.toUpperCase(); 956 if(only) only = [only].flatten(); 957 var elements = []; 958 $A(element.childNodes).each( function(e) { 959 if(e.tagName && e.tagName.toUpperCase()==tagName && 960 (!only || (Element.classNames(e).detect(function(v) { return only.include(v) })))) 961 elements.push(e); 962 if(recursive) { 963 var grandchildren = Element.findChildren(e, only, recursive, tagName); 964 if(grandchildren) elements.push(grandchildren); 965 } 966 }); 967 968 return (elements.length>0 ? elements.flatten() : []); 969}; 970 971Element.offsetSize = function (element, type) { 972 return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')]; 973};
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.