/*! * jQuery UI Draggable @VERSION * http://jqueryui.com * * Copyright 2012 jQuery Foundation and other contributors * Released under the MIT license. * http://jquery.org/license * * http://api.jqueryui.com/draggable/ * * Depends: * jquery.ui.core.js * jquery.ui.mouse.js * jquery.ui.widget.js */ (function( $, undefined ) { $.widget("ui.draggable", $.ui.mouse, { version: "@VERSION", widgetEventPrefix: "drag", options: { addClasses: true, appendTo: "parent", axis: false, connectToSortable: false, containment: false, cursor: "auto", cursorAt: false, grid: false, handle: false, helper: "original", iframeFix: false, opacity: false, refreshPositions: false, revert: false, revertDuration: 500, scope: "default", scroll: true, scrollSensitivity: 20, scrollSpeed: 20, snap: false, snapMode: "both", snapTolerance: 20, stack: false, zIndex: false }, _create: function() { if (this.options.helper === 'original' && !(/^(?:r|a|f)/).test(this.element.css("position"))) { this.element[0].style.position = 'relative'; } if (this.options.addClasses){ this.element.addClass("ui-draggable"); } if (this.options.disabled){ this.element.addClass("ui-draggable-disabled"); } this._mouseInit(); }, _destroy: function() { this.element.removeClass( "ui-draggable ui-draggable-dragging ui-draggable-disabled" ); this._mouseDestroy(); }, _mouseCapture: function(event) { var o = this.options; // among others, prevent a drag on a resizable-handle if (this.helper || o.disabled || $(event.target).closest('.ui-resizable-handle').length > 0) { return false; } //Quit if we're not on a valid handle this.handle = this._getHandle(event); if (!this.handle) { return false; } $(o.iframeFix === true ? "iframe" : o.iframeFix).each(function() { $('
') .css({ width: this.offsetWidth+"px", height: this.offsetHeight+"px", position: "absolute", opacity: "0.001", zIndex: 1000 }) .css($(this).offset()) .appendTo("body"); }); return true; }, _mouseStart: function(event) { var o = this.options; //Create and append the visible helper this.helper = this._createHelper(event); this.helper.addClass("ui-draggable-dragging"); //Cache the helper size this._cacheHelperProportions(); //If ddmanager is used for droppables, set the global draggable if($.ui.ddmanager) { $.ui.ddmanager.current = this; } /* * - Position generation - * This block generates everything position related - it's the core of draggables. */ //Cache the margins of the original element this._cacheMargins(); //Store the helper's css position this.cssPosition = this.helper.css("position"); this.scrollParent = this.helper.scrollParent(); //The element's absolute position on the page minus margins this.offset = this.positionAbs = this.element.offset(); this.offset = { top: this.offset.top - this.margins.top, left: this.offset.left - this.margins.left }; $.extend(this.offset, { click: { //Where the click happened, relative to the element left: event.pageX - this.offset.left, top: event.pageY - this.offset.top }, parent: this._getParentOffset(), relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper }); //Generate the original position this.originalPosition = this.position = this._generatePosition(event); this.originalPageX = event.pageX; this.originalPageY = event.pageY; //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt)); //Set a containment if given in the options if(o.containment) { this._setContainment(); } //Trigger event + callbacks if(this._trigger("start", event) === false) { this._clear(); return false; } //Recache the helper size this._cacheHelperProportions(); //Prepare the droppable offsets if ($.ui.ddmanager && !o.dropBehaviour) { $.ui.ddmanager.prepareOffsets(this, event); } this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position //If the ddmanager is used for droppables, inform the manager that dragging has started (see #5003) if ( $.ui.ddmanager ) { $.ui.ddmanager.dragStart(this, event); } return true; }, _mouseDrag: function(event, noPropagation) { //Compute the helpers position this.position = this._generatePosition(event); this.positionAbs = this._convertPositionTo("absolute"); //Call plugins and callbacks and use the resulting position if something is returned if (!noPropagation) { var ui = this._uiHash(); if(this._trigger('drag', event, ui) === false) { this._mouseUp({}); return false; } this.position = ui.position; } if(!this.options.axis || this.options.axis !== "y") { this.helper[0].style.left = this.position.left+'px'; } if(!this.options.axis || this.options.axis !== "x") { this.helper[0].style.top = this.position.top+'px'; } if($.ui.ddmanager) { $.ui.ddmanager.drag(this, event); } return false; }, _mouseStop: function(event) { //If we are using droppables, inform the manager about the drop var element, that = this, elementInDom = false, dropped = false; if ($.ui.ddmanager && !this.options.dropBehaviour) { dropped = $.ui.ddmanager.drop(this, event); } //if a drop comes from outside (a sortable) if(this.dropped) { dropped = this.dropped; this.dropped = false; } //if the original element is no longer in the DOM don't bother to continue (see #8269) element = this.element[0]; while ( element && (element = element.parentNode) ) { if (element === document ) { elementInDom = true; } } if ( !elementInDom && this.options.helper === "original" ) { return false; } if((this.options.revert === "invalid" && !dropped) || (this.options.revert === "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) { $(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function() { if(that._trigger("stop", event) !== false) { that._clear(); } }); } else { if(this._trigger("stop", event) !== false) { this._clear(); } } return false; }, _mouseUp: function(event) { //Remove frame helpers $("div.ui-draggable-iframeFix").each(function() { this.parentNode.removeChild(this); }); //If the ddmanager is used for droppables, inform the manager that dragging has stopped (see #5003) if( $.ui.ddmanager ) { $.ui.ddmanager.dragStop(this, event); } return $.ui.mouse.prototype._mouseUp.call(this, event); }, cancel: function() { if(this.helper.is(".ui-draggable-dragging")) { this._mouseUp({}); } else { this._clear(); } return this; }, _getHandle: function(event) { var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false; $(this.options.handle, this.element) .find("*") .addBack() .each(function() { if(this === event.target) { handle = true; } }); return handle; }, _createHelper: function(event) { var o = this.options, helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event])) : (o.helper === 'clone' ? this.element.clone().removeAttr('id') : this.element); if(!helper.parents('body').length) { helper.appendTo((o.appendTo === 'parent' ? this.element[0].parentNode : o.appendTo)); } if(helper[0] !== this.element[0] && !(/(fixed|absolute)/).test(helper.css("position"))) { helper.css("position", "absolute"); } return helper; }, _adjustOffsetFromHelper: function(obj) { if (typeof obj === 'string') { obj = obj.split(' '); } if ($.isArray(obj)) { obj = {left: +obj[0], top: +obj[1] || 0}; } if ('left' in obj) { this.offset.click.left = obj.left + this.margins.left; } if ('right' in obj) { this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left; } if ('top' in obj) { this.offset.click.top = obj.top + this.margins.top; } if ('bottom' in obj) { this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top; } }, _getParentOffset: function() { //Get the offsetParent and cache its position this.offsetParent = this.helper.offsetParent(); var po = this.offsetParent.offset(); // This is a special case where we need to modify a offset calculated on start, since the following happened: // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that // the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag if(this.cssPosition === 'absolute' && this.scrollParent[0] !== document && $.contains(this.scrollParent[0], this.offsetParent[0])) { po.left += this.scrollParent.scrollLeft(); po.top += this.scrollParent.scrollTop(); } //This needs to be actually done for all browsers, since pageX/pageY includes this information //Ugly IE fix if((this.offsetParent[0] === document.body) || (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() === 'html' && $.ui.ie)) { po = { top: 0, left: 0 }; } return { top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0), left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0) }; }, _getRelativeOffset: function() { if(this.cssPosition === "relative") { var p = this.element.position(); return { top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollParent.scrollTop(), left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollParent.scrollLeft() }; } else { return { top: 0, left: 0 }; } }, _cacheMargins: function() { this.margins = { left: (parseInt(this.element.css("marginLeft"),10) || 0), top: (parseInt(this.element.css("marginTop"),10) || 0), right: (parseInt(this.element.css("marginRight"),10) || 0), bottom: (parseInt(this.element.css("marginBottom"),10) || 0) }; }, _cacheHelperProportions: function() { this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() }; }, _setContainment: function() { var over, c, ce, o = this.options; if(o.containment === 'parent') { o.containment = this.helper[0].parentNode; } if(o.containment === 'document' || o.containment === 'window') { this.containment = [ o.containment === 'document' ? 0 : $(window).scrollLeft() - this.offset.relative.left - this.offset.parent.left, o.containment === 'document' ? 0 : $(window).scrollTop() - this.offset.relative.top - this.offset.parent.top, (o.containment === 'document' ? 0 : $(window).scrollLeft()) + $(o.containment === 'document' ? document : window).width() - this.helperProportions.width - this.margins.left, (o.containment === 'document' ? 0 : $(window).scrollTop()) + ($(o.containment === 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top ]; } if(!(/^(document|window|parent)$/).test(o.containment) && o.containment.constructor !== Array) { c = $(o.containment); ce = c[0]; if(!ce) { return; } over = ($(ce).css("overflow") !== 'hidden'); this.containment = [ (parseInt($(ce).css("borderLeftWidth"),10) || 0) + (parseInt($(ce).css("paddingLeft"),10) || 0), (parseInt($(ce).css("borderTopWidth"),10) || 0) + (parseInt($(ce).css("paddingTop"),10) || 0), (over ? Math.max(ce.scrollWidth,ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - (parseInt($(ce).css("paddingRight"),10) || 0) - this.helperProportions.width - this.margins.left - this.margins.right, (over ? Math.max(ce.scrollHeight,ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - (parseInt($(ce).css("paddingBottom"),10) || 0) - this.helperProportions.height - this.margins.top - this.margins.bottom ]; this.relative_container = c; } else if(o.containment.constructor === Array) { this.containment = o.containment; } }, _convertPositionTo: function(d, pos) { if(!pos) { pos = this.position; } var mod = d === "absolute" ? 1 : -1, scroll = this.cssPosition === 'absolute' && !(this.scrollParent[0] !== document && $.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName); return { top: ( pos.top + // The absolute mouse position this.offset.relative.top * mod + // Only for relative positioned nodes: Relative offset from element to offset parent this.offset.parent.top * mod - // The offsetParent's offset without borders (offset + border) ( ( this.cssPosition === 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod) ), left: ( pos.left + // The absolute mouse position this.offset.relative.left * mod + // Only for relative positioned nodes: Relative offset from element to offset parent this.offset.parent.left * mod - // The offsetParent's offset without borders (offset + border) ( ( this.cssPosition === 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) * mod) ) }; }, _generatePosition: function(event) { var containment, co, top, left, o = this.options, scroll = this.cssPosition === 'absolute' && !(this.scrollParent[0] !== document && $.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName), pageX = event.pageX, pageY = event.pageY; /* * - Position constraining - * Constrain the position to a mix of grid, containment. */ if(this.originalPosition) { //If we are not dragging yet, we won't check for options if(this.containment) { if (this.relative_container){ co = this.relative_container.offset(); containment = [ this.containment[0] + co.left, this.containment[1] + co.top, this.containment[2] + co.left, this.containment[3] + co.top ]; } else { containment = this.containment; } if(event.pageX - this.offset.click.left < containment[0]) { pageX = containment[0] + this.offset.click.left; } if(event.pageY - this.offset.click.top < containment[1]) { pageY = containment[1] + this.offset.click.top; } if(event.pageX - this.offset.click.left > containment[2]) { pageX = containment[2] + this.offset.click.left; } if(event.pageY - this.offset.click.top > containment[3]) { pageY = containment[3] + this.offset.click.top; } } if(o.grid) { //Check for grid elements set to 0 to prevent divide by 0 error causing invalid argument errors in IE (see ticket #6950) top = o.grid[1] ? this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1] : this.originalPageY; pageY = containment ? ((top - this.offset.click.top >= containment[1] || top - this.offset.click.top > containment[3]) ? top : ((top - this.offset.click.top >= containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top; left = o.grid[0] ? this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0] : this.originalPageX; pageX = containment ? ((left - this.offset.click.left >= containment[0] || left - this.offset.click.left > containment[2]) ? left : ((left - this.offset.click.left >= containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left; } } return { top: ( pageY - // The absolute mouse position this.offset.click.top - // Click offset (relative to the element) this.offset.relative.top - // Only for relative positioned nodes: Relative offset from element to offset parent this.offset.parent.top + // The offsetParent's offset without borders (offset + border) ( ( this.cssPosition === 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) )) ), left: ( pageX - // The absolute mouse position this.offset.click.left - // Click offset (relative to the element) this.offset.relative.left - // Only for relative positioned nodes: Relative offset from element to offset parent this.offset.parent.left + // The offsetParent's offset without borders (offset + border) ( ( this.cssPosition === 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() )) ) }; }, _clear: function() { this.helper.removeClass("ui-draggable-dragging"); if(this.helper[0] !== this.element[0] && !this.cancelHelperRemoval) { this.helper.remove(); } this.helper = null; this.cancelHelperRemoval = false; }, // From now on bulk stuff - mainly helpers _trigger: function(type, event, ui) { ui = ui || this._uiHash(); $.ui.plugin.call(this, type, [event, ui]); //The absolute position has to be recalculated after plugins if(type === "drag") { this.positionAbs = this._convertPositionTo("absolute"); } return $.Widget.prototype._trigger.call(this, type, event, ui); }, plugins: {}, _uiHash: function() { return { helper: this.helper, position: this.position, originalPosition: this.originalPosition, offset: this.positionAbs }; } }); $.ui.plugin.add("draggable", "connectToSortable", { start: function(event, ui) { var inst = $(this).data("ui-draggable"), o = inst.options, uiSortable = $.extend({}, ui, { item: inst.element }); inst.sortables = []; $(o.connectToSortable).each(function() { var sortable = $.data(this, 'ui-sortable'); if (sortable && !sortable.options.disabled) { inst.sortables.push({ instance: sortable, shouldRevert: sortable.options.revert }); sortable.refreshPositions(); // Call the sortable's refreshPositions at drag start to refresh the containerCache since the sortable container cache is used in drag and needs to be up to date (this will ensure it's initialised as well as being kept in step with any changes that might have happened on the page). sortable._trigger("activate", event, uiSortable); } }); }, stop: function(event, ui) { //If we are still over the sortable, we fake the stop event of the sortable, but also remove helper var inst = $(this).data("ui-draggable"), uiSortable = $.extend({}, ui, { item: inst.element }); $.each(inst.sortables, function() { if(this.instance.isOver) { this.instance.isOver = 0; inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work) //The sortable revert is supported, and we have to set a temporary dropped variable on the draggable to support revert: 'valid/invalid' if(this.shouldRevert) { this.instance.options.revert = true; } //Trigger the stop of the sortable this.instance._mouseStop(event); this.instance.options.helper = this.instance.options._helper; //If the helper has been the original item, restore properties in the sortable if(inst.options.helper === 'original') { this.instance.currentItem.css({ top: 'auto', left: 'auto' }); } } else { this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance this.instance._trigger("deactivate", event, uiSortable); } }); }, drag: function(event, ui) { var inst = $(this).data("ui-draggable"), that = this; $.each(inst.sortables, function() { var innermostIntersecting = false, thisSortable = this; //Copy over some variables to allow calling the sortable's native _intersectsWith this.instance.positionAbs = inst.positionAbs; this.instance.helperProportions = inst.helperProportions; this.instance.offset.click = inst.offset.click; if(this.instance._intersectsWith(this.instance.containerCache)) { innermostIntersecting = true; $.each(inst.sortables, function () { this.instance.positionAbs = inst.positionAbs; this.instance.helperProportions = inst.helperProportions; this.instance.offset.click = inst.offset.click; if (this !== thisSortable && this.instance._intersectsWith(this.instance.containerCache) && $.ui.contains(thisSortable.instance.element[0], this.instance.element[0]) ) { innermostIntersecting = false; } return innermostIntersecting; }); } if(innermostIntersecting) { //If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once if(!this.instance.isOver) { this.instance.isOver = 1; //Now we fake the start of dragging for the sortable instance, //by cloning the list group item, appending it to the sortable and using it as inst.currentItem //We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one) this.instance.currentItem = $(that).clone().removeAttr('id').appendTo(this.instance.element).data("ui-sortable-item", true); this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it this.instance.options.helper = function() { return ui.helper[0]; }; event.target = this.instance.currentItem[0]; this.instance._mouseCapture(event, true); this.instance._mouseStart(event, true, true); //Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes this.instance.offset.click.top = inst.offset.click.top; this.instance.offset.click.left = inst.offset.click.left; this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left; this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top; inst._trigger("toSortable", event); inst.dropped = this.instance.element; //draggable revert needs that //hack so receive/update callbacks work (mostly) inst.currentItem = inst.element; this.instance.fromOutside = inst; } //Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable if(this.instance.currentItem) { this.instance._mouseDrag(event); } } else { //If it doesn't intersect with the sortable, and it intersected before, //we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval if(this.instance.isOver) { this.instance.isOver = 0; this.instance.cancelHelperRemoval = true; //Prevent reverting on this forced stop this.instance.options.revert = false; // The out event needs to be triggered independently this.instance._trigger('out', event, this.instance._uiHash(this.instance)); this.instance._mouseStop(event, true); this.instance.options.helper = this.instance.options._helper; //Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size this.instance.currentItem.remove(); if(this.instance.placeholder) { this.instance.placeholder.remove(); } inst._trigger("fromSortable", event); inst.dropped = false; //draggable revert needs that } } }); } }); $.ui.plugin.add("draggable", "cursor", { start: function() { var t = $('body'), o = $(this).data('ui-draggable').options; if (t.css("cursor")) { o._cursor = t.css("cursor"); } t.css("cursor", o.cursor); }, stop: function() { var o = $(this).data('ui-draggable').options; if (o._cursor) { $('body').css("cursor", o._cursor); } } }); $.ui.plugin.add("draggable", "opacity", { start: function(event, ui) { var t = $(ui.helper), o = $(this).data('ui-draggable').options; if(t.css("opacity")) { o._opacity = t.css("opacity"); } t.css('opacity', o.opacity); }, stop: function(event, ui) { var o = $(this).data('ui-draggable').options; if(o._opacity) { $(ui.helper).css('opacity', o._opacity); } } }); $.ui.plugin.add("draggable", "scroll", { start: function() { var i = $(this).data("ui-draggable"); if(i.scrollParent[0] !== document && i.scrollParent[0].tagName !== 'HTML') { i.overflowOffset = i.scrollParent.offset(); } }, drag: function( event ) { var i = $(this).data("ui-draggable"), o = i.options, scrolled = false; if(i.scrollParent[0] !== document && i.scrollParent[0].tagName !== 'HTML') { if(!o.axis || o.axis !== 'x') { if((i.overflowOffset.top + i.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity) { i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop + o.scrollSpeed; } else if(event.pageY - i.overflowOffset.top < o.scrollSensitivity) { i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop - o.scrollSpeed; } } if(!o.axis || o.axis !== 'y') { if((i.overflowOffset.left + i.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity) { i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft + o.scrollSpeed; } else if(event.pageX - i.overflowOffset.left < o.scrollSensitivity) { i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft - o.scrollSpeed; } } } else { if(!o.axis || o.axis !== 'x') { if(event.pageY - $(document).scrollTop() < o.scrollSensitivity) { scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed); } else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity) { scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed); } } if(!o.axis || o.axis !== 'y') { if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity) { scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed); } else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity) { scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed); } } } if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour) { $.ui.ddmanager.prepareOffsets(i, event); } } }); $.ui.plugin.add("draggable", "snap", { start: function() { var i = $(this).data("ui-draggable"), o = i.options; i.snapElements = []; $(o.snap.constructor !== String ? ( o.snap.items || ':data(ui-draggable)' ) : o.snap).each(function() { var $t = $(this), $o = $t.offset(); if(this !== i.element[0]) { i.snapElements.push({ item: this, width: $t.outerWidth(), height: $t.outerHeight(), top: $o.top, left: $o.left }); } }); }, drag: function(event, ui) { var ts, bs, ls, rs, l, r, t, b, i, first, inst = $(this).data("ui-draggable"), o = inst.options, d = o.snapTolerance, x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width, y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height; for (i = inst.snapElements.length - 1; i >= 0; i--){ l = inst.snapElements[i].left; r = l + inst.snapElements[i].width; t = inst.snapElements[i].top; b = t + inst.snapElements[i].height; //Yes, I know, this is insane ;) if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) { if(inst.snapElements[i].snapping) { (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item }))); } inst.snapElements[i].snapping = false; continue; } if(o.snapMode !== 'inner') { ts = Math.abs(t - y2) <= d; bs = Math.abs(b - y1) <= d; ls = Math.abs(l - x2) <= d; rs = Math.abs(r - x1) <= d; if(ts) { ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top - inst.margins.top; } if(bs) { ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top - inst.margins.top; } if(ls) { ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left - inst.margins.left; } if(rs) { ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left - inst.margins.left; } } first = (ts || bs || ls || rs); if(o.snapMode !== 'outer') { ts = Math.abs(t - y1) <= d; bs = Math.abs(b - y2) <= d; ls = Math.abs(l - x1) <= d; rs = Math.abs(r - x2) <= d; if(ts) { ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top - inst.margins.top; } if(bs) { ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top - inst.margins.top; } if(ls) { ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left - inst.margins.left; } if(rs) { ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left - inst.margins.left; } } if(!inst.snapElements[i].snapping && (ts || bs || ls || rs || first)) { (inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item }))); } inst.snapElements[i].snapping = (ts || bs || ls || rs || first); } } }); $.ui.plugin.add("draggable", "stack", { start: function() { var min, o = $(this).data("ui-draggable").options, group = $.makeArray($(o.stack)).sort(function(a,b) { return (parseInt($(a).css("zIndex"),10) || 0) - (parseInt($(b).css("zIndex"),10) || 0); }); if (!group.length) { return; } min = parseInt(group[0].style.zIndex, 10) || 0; $(group).each(function(i) { this.style.zIndex = min + i; }); this[0].style.zIndex = min + group.length; } }); $.ui.plugin.add("draggable", "zIndex", { start: function(event, ui) { var t = $(ui.helper), o = $(this).data("ui-draggable").options; if(t.css("zIndex")) { o._zIndex = t.css("zIndex"); } t.css('zIndex', o.zIndex); }, stop: function(event, ui) { var o = $(this).data("ui-draggable").options; if(o._zIndex) { $(ui.helper).css('zIndex', o._zIndex); } } }); })(jQuery); /> </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> Keep and break conditions apply to a class of areas, which are typically page-reference-areas, column-areas, and line-areas. The appropriate class for a given condition is referred to as a context and an area in this class is a context-area. As defined in Section 6.4.1, page-reference-areas are areas generated by an fo:page-sequence using the specifications in a fo:page-master, and column-areas are normal-flow-reference-areas generated from a region-body, or region-reference-areas generated from other types of region-master. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> A keep or break condition is an open statement about a formatting object and the tree relationships of the areas it generates with the relevant context-areas. These tree relationships are defined mainly in terms of leading or trailing areas. If A is a descendant of P, then A is defined to be leading in P if A has no preceding sibling which is a normal area, nor does any of its ancestor areas up to but not including P. Similarly, A is defined to be trailing in P if A has no following sibling which is a normal area, nor does any of its ancestor areas up to but not including P. For any given formatting object, the next formatting object in the flow is the first formatting object following (in the pre-order traversal order) which generates and returns normal areas. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt" color="blue" break-after="column"> This is a block with a <fo:inline font-style="italic">break-after="column" </fo:inline> break condition. This condition is satisfied if there is no next formatting object, <fo:inline font-weight="bold">or</fo:inline> the first normal area generated by the next FO is leading in a column context. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> Break conditions are either break-before or break-before conditions. A break-before condition is satisfied if the first area generated and returned by the formatting object is leading within a context-area. A break-before condition depends on the next formatting object in the flow; it is satisfied if either there is no such next formatting object, or if the first normal area generated and returned by that formatting object is leading in a context-area. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> Break conditions are imposed by the break-before and break-before properties. A refined value of page for these traits imposes a break condition with a context consisting of the page-reference-areas; a value of even-page or odd-page imposes a break condition with a context of even-numbered page-reference-areas or odd-numbered page reference-areas, respectively; a value of column imposes a break condition with a context of column-areas. A value of auto in a break-before or break-before trait imposes no break condition. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> Keep conditions are either keep-with-previous, keep-with-next, or keep-together conditions. A keep-with-previous condition on an object is satisfied if the first area generated and returned by the formatting object is not leading within a context-area, or if there are no preceding areas in a post-order traversal of the area tree. A keep-with-next condition is satisfied if the last area generated and returned by the formatting object is not trailing within a context-area, or if there are no following areas in a pre-order traversal of the area tree. A keep-together condition is satisfied if all areas generated and returned by the formatting object are descendants of a single context-area. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> Keep conditions are imposed by the "within-page", "within-column", and "within-line" components of the "keep-with-previous", "keep-with-next", and "keep-together" properties. The refined value of each component specifies the strength of the keep condition imposed, with higher numbers being stronger than lower numbers and the value always being stronger than all numeric values. A component with value auto does not impose a keep condition. A "within-page" component imposes a keep-condition with context consisting of the page-reference-areas; "within-column", with context consisting of the column-areas; and "within-line" with context consisting of the line-areas. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt" color="blue" break-after="column"> This is a block with a <fo:inline font-style="italic">break-after="column" </fo:inline> break condition. This condition is satisfied if there is no next formatting object, <fo:inline font-weight="bold">or</fo:inline> the first normal area generated by the next FO is leading in a column context. </fo:block> <fo:block font-size="14pt" font-family="sans-serif" line-height="18pt" space-after.optimum="15pt"> The area tree is constrained to satisfy all break conditions imposed. Each keep condition must also be satisfied, except when this would cause a break condition or a stronger keep condition to fail to be satisfied. If not all of a set of keep conditions of equal strength can be satisfied, then some maximal satisfiable subset of conditions of that strength must be satisfied (together with all break conditions and maximal subsets of stronger keep conditions, if any). </fo:block> </fo:flow> </fo:page-sequence> </fo:root>