mirror of
https://github.com/jquery/jquery-ui.git
synced 2024-11-21 11:04:24 +00:00
477 lines
13 KiB
JavaScript
477 lines
13 KiB
JavaScript
/*!
|
|
* jQuery UI Sortable @VERSION
|
|
* http://jqueryui.com
|
|
*
|
|
* Copyright 2012 jQuery Foundation and other contributors
|
|
* Dual licensed under the MIT or GPL Version 2 licenses.
|
|
* http://jquery.org/license
|
|
*
|
|
* http://docs.jquery.com/UI/Sortable
|
|
*
|
|
* Depends:
|
|
* jquery.ui.core.js
|
|
* jquery.ui.interaction.js
|
|
* jquery.ui.widget.js
|
|
*/
|
|
(function( $, undefined ) {
|
|
|
|
// create a shallow copy of an object
|
|
function copy( obj ) {
|
|
var prop,
|
|
ret = {};
|
|
for ( prop in obj ) {
|
|
ret[ prop ] = obj[ prop ];
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
$.widget( "ui.sortable", $.ui.interaction, {
|
|
version: "@VERSION",
|
|
widgetEventPrefix: "sort",
|
|
items: 'li', // TODO: move to options when API is ready
|
|
|
|
// dragEl: element being dragged (original or helper)
|
|
// position: final CSS position of dragEl
|
|
// offset: offset of dragEl
|
|
// originalPosition: CSS position before drag start
|
|
// originalOffset: offset before drag start
|
|
// originalPointer: pageX/Y at drag start (offset of pointer)
|
|
// startPosition: CSS position at drag start (after beforeStart)
|
|
// startOffset: offset at drag start (after beforeStart)
|
|
// tempPosition: overridable CSS position of dragEl
|
|
// overflowOffset: offset of scroll parent
|
|
// overflow: object containing width and height keys of scroll parent
|
|
// sortablePositions: cache of positions of all sortable items
|
|
// originalCssPosition: CSS position of element before being made absolute on start
|
|
// placeholder: reference to jquery object of cloned element that is being dragged
|
|
|
|
options: {
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
this._super();
|
|
|
|
this.element.addClass( "ui-sortable" );
|
|
|
|
this._setSortablePositions();
|
|
|
|
},
|
|
|
|
_setSortablePositions: function() {
|
|
|
|
var sortablePositions = this.sortablePositions = [];
|
|
|
|
this.element.find( this.items ).each( function() {
|
|
|
|
var el = $(this);
|
|
|
|
sortablePositions.push([{
|
|
el: el,
|
|
offset: el.offset()
|
|
}]);
|
|
});
|
|
|
|
},
|
|
|
|
/** interaction interface **/
|
|
|
|
_isValidTarget: function( element ) {
|
|
|
|
// TODO: options for what is actually valid
|
|
return element.is( this.items );
|
|
},
|
|
|
|
_start: function( event, pointerPosition ) {
|
|
|
|
// The actual dragging element, should always be a jQuery object
|
|
// this.dragEl = this.options.helper ?
|
|
// this._createHelper( pointerPosition ) :
|
|
// this.element;
|
|
|
|
this.dragEl = $(event.target);
|
|
|
|
// Save original css position if there are currently styles
|
|
// Otherwise the original css will be set back by removing attribute
|
|
if ( this.dragEl[0].style.position ) {
|
|
this.originalCssPosition = this.dragEl[0].style.position;
|
|
}
|
|
|
|
// Create placeholder for while element is dragging
|
|
// TODO: what do we do about IDs?
|
|
// TODO: possibly use CSS for visibility portion
|
|
this.placeholder = this.dragEl.clone().removeAttr('id').css({
|
|
visibility : 'hidden',
|
|
position : this.originalCssPosition || ''
|
|
});
|
|
|
|
this.dragEl.after( this.placeholder );
|
|
|
|
this.dragEl.css( 'position', 'absolute' );
|
|
|
|
// // _createHelper() ensures that helpers are in the correct position
|
|
// // in the DOM, but we need to handle appendTo when there is no helper
|
|
// if ( this.options.appendTo && this.dragEl === this.element ) {
|
|
// this.domPosition = {
|
|
// parent: this.element.parent(),
|
|
// index: this.element.index()
|
|
// };
|
|
// offset = this.dragEl.offset();
|
|
// this.dragEl
|
|
// .appendTo( this.options.appendTo )
|
|
// .offset( offset );
|
|
// }
|
|
|
|
this.cssPosition = this.dragEl.css( "position" );
|
|
this.scrollParent = this.element.scrollParent();
|
|
|
|
// Cache starting positions
|
|
this.originalPosition = this.startPosition = this._getPosition();
|
|
this.originalOffset = this.startOffset = this.dragEl.offset();
|
|
this.originalPointer = pointerPosition;
|
|
|
|
// Cache current position and offset
|
|
this.position = copy( this.startPosition );
|
|
this.offset = copy( this.startOffset );
|
|
|
|
// Cache the offset of scrollParent, if required for _handleScrolling
|
|
if ( this.scrollParent[0] !== this.document[0] && this.scrollParent[0].tagName !== "HTML" ) {
|
|
this.overflowOffset = this.scrollParent.offset();
|
|
}
|
|
|
|
this.overflow = {
|
|
height: this.scrollParent[0] === this.document[0] ?
|
|
this.window.height() : this.scrollParent.height(),
|
|
width: this.scrollParent[0] === this.document[0] ?
|
|
this.window.width() : this.scrollParent.width()
|
|
};
|
|
|
|
this._preparePosition( pointerPosition );
|
|
|
|
// If user cancels beforeStart, don't allow dragging
|
|
if ( this._trigger( "beforeStart", event,
|
|
this._originalHash( pointerPosition ) ) === false ) {
|
|
return false;
|
|
|
|
}
|
|
|
|
this._setCss();
|
|
this.startPosition = this._getPosition();
|
|
this.startOffset = this.dragEl.offset();
|
|
|
|
this._trigger( "start", event, this._fullHash( pointerPosition ) );
|
|
this._blockFrames();
|
|
},
|
|
|
|
_move: function( event, pointerPosition ) {
|
|
|
|
var sort, sortItem, sortIndex,
|
|
len = this.sortablePositions.length;
|
|
|
|
|
|
this._preparePosition( pointerPosition );
|
|
|
|
// // If user cancels drag, don't move the element
|
|
// if ( this._trigger( "drag", event, this._fullHash( pointerPosition ) ) === false ) {
|
|
// return;
|
|
// }
|
|
|
|
this._setCss();
|
|
|
|
// Scroll the scrollParent, if needed
|
|
this._handleScrolling( pointerPosition );
|
|
|
|
for ( sortIndex=0; sortIndex<len; ++sortIndex ) {
|
|
|
|
for ( sort in this.sortablePositions[sortIndex] ) {
|
|
|
|
sortItem = this.sortablePositions[sortIndex][sort];
|
|
|
|
// Don't bother checking against self
|
|
if ( sortItem.el[0] === this.dragEl[0] ) {
|
|
continue;
|
|
}
|
|
|
|
if ( this._over( sortItem ) ) {
|
|
|
|
// TODO: cache height of element
|
|
if ( ( this.offset.top + this.dragEl.height() ) > ( sortItem.offset.top + sortItem.el.height()/2 ) ) {
|
|
|
|
sortItem.el.after( this.dragEl );
|
|
this.dragEl.after( this.placeholder );
|
|
this._setSortablePositions();
|
|
}
|
|
else if ( this.offset.top < ( sortItem.offset.top + sortItem.el.height()/2 ) ) {
|
|
sortItem.el.before( this.dragEl );
|
|
this.dragEl.before( this.placeholder );
|
|
this._setSortablePositions();
|
|
}
|
|
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
|
|
},
|
|
|
|
// TODO: swap out for real tolerance options
|
|
_over: function( sortItem ) {
|
|
|
|
// TODO: use same cache from _move for height and width of element
|
|
var edges = {
|
|
droppableRight: sortItem.offset.left + sortItem.el.width(),
|
|
droppableBottom: sortItem.offset.top + sortItem.el.height(),
|
|
draggableRight: this.offset.left + this.dragEl.width(),
|
|
draggableBottom: this.offset.top + this.dragEl.height()
|
|
};
|
|
|
|
return sortItem.offset.left < edges.draggableRight &&
|
|
edges.droppableRight > this.offset.left &&
|
|
sortItem.offset.top < edges.draggableBottom &&
|
|
edges.droppableBottom > sortItem.offset.top;
|
|
|
|
},
|
|
|
|
_stop: function( event, pointerPosition ) {
|
|
|
|
this._preparePosition( pointerPosition );
|
|
|
|
// // If user cancels stop, leave helper there
|
|
// if ( this._trigger( "stop", event, this._fullHash( pointerPosition ) ) !== false ) {
|
|
// if ( this.options.helper ) {
|
|
// this.dragEl.remove();
|
|
// }
|
|
// this._resetDomPosition();
|
|
// }
|
|
|
|
// If there were inline styles before drag, set them back
|
|
if ( this.originalCssPosition ) {
|
|
this.dragEl.css( 'position', this.originalCssPosition );
|
|
}
|
|
// If there were no inline styles, let CSS take over again by removing inline absolute
|
|
else {
|
|
this.dragEl.css( 'position', '' );
|
|
}
|
|
|
|
// TODO: should same thing be done here as is done for position or is there better way altogether
|
|
this.dragEl.css( 'left', '' );
|
|
this.dragEl.css( 'top', '' );
|
|
|
|
this.placeholder.remove();
|
|
|
|
// Unset properties only needed during draggin/sorting
|
|
this.dragEl = null;
|
|
this.originalCssPosition = null;
|
|
this.placeholder = null;
|
|
|
|
this._unblockFrames();
|
|
},
|
|
|
|
// /** internal **/
|
|
|
|
// _createHelper: function( pointerPosition ) {
|
|
// var helper,
|
|
// offset = this.element.offset(),
|
|
// xPos = (pointerPosition.x - offset.left) / this.element.outerWidth(),
|
|
// yPos = (pointerPosition.y - offset.top) / this.element.outerHeight();
|
|
|
|
// // clone
|
|
// if ( this.options.helper === true ) {
|
|
// helper = this.element.clone()
|
|
// .removeAttr( "id" )
|
|
// .find( "[id]" )
|
|
// .removeAttr( "id" )
|
|
// .end();
|
|
// } else {
|
|
// // TODO: figure out the signature for this; see #4957
|
|
// helper = $( this.options.helper() );
|
|
// }
|
|
|
|
// // Ensure the helper is in the DOM; obey the appendTo option if it exists
|
|
// if ( this.options.appendTo || !helper.closest( "body" ).length ) {
|
|
// helper.appendTo( this.options.appendTo || this.document[0].body );
|
|
// }
|
|
|
|
// return helper
|
|
// // Helper must be absolute to function properly
|
|
// .css( "position", "absolute" )
|
|
// .offset({
|
|
// left: pointerPosition.x - helper.outerWidth() * xPos,
|
|
// top: pointerPosition.y - helper.outerHeight() * yPos
|
|
// });
|
|
// },
|
|
|
|
_getPosition: function() {
|
|
var left, top, position,
|
|
scrollTop = this.scrollParent.scrollTop(),
|
|
scrollLeft = this.scrollParent.scrollLeft();
|
|
|
|
// If fixed or absolute
|
|
if ( this.cssPosition !== "relative" ) {
|
|
position = this.dragEl.position();
|
|
|
|
// Take into account scrollbar
|
|
position.top -= scrollTop;
|
|
position.left -= scrollLeft;
|
|
|
|
return position;
|
|
}
|
|
|
|
// When using relative, css values are checked
|
|
// Otherwise the position wouldn't account for padding on ancestors
|
|
left = this.dragEl.css( "left" );
|
|
top = this.dragEl.css( "top" );
|
|
|
|
// Webkit will give back auto if there is no explicit value
|
|
left = ( left === "auto" ) ? 0: parseInt( left, 10 );
|
|
top = ( top === "auto" ) ? 0: parseInt( top, 10 );
|
|
|
|
return {
|
|
left: left - scrollLeft,
|
|
top: top - scrollTop
|
|
};
|
|
},
|
|
|
|
_handleScrolling: function( pointerPosition ) {
|
|
var scrollTop = this.scrollParent.scrollTop(),
|
|
scrollLeft = this.scrollParent.scrollLeft(),
|
|
scrollSensitivity = 20,
|
|
baseSpeed = 5,
|
|
speed = function( distance ) {
|
|
return baseSpeed + Math.round( distance / 2 );
|
|
},
|
|
// overflowOffset is only set when scrollParent is not doc/html
|
|
overflowLeft = this.overflowOffset ?
|
|
this.overflowOffset.left :
|
|
scrollLeft,
|
|
overflowTop = this.overflowOffset ?
|
|
this.overflowOffset.top :
|
|
scrollTop,
|
|
xRight = this.overflow.width + overflowLeft - pointerPosition.x,
|
|
xLeft = pointerPosition.x- overflowLeft,
|
|
yBottom = this.overflow.height + overflowTop - pointerPosition.y,
|
|
yTop = pointerPosition.y - overflowTop;
|
|
|
|
// Handle vertical scrolling
|
|
if ( yBottom < scrollSensitivity ) {
|
|
this.scrollParent.scrollTop( scrollTop +
|
|
speed( scrollSensitivity - yBottom ) );
|
|
} else if ( yTop < scrollSensitivity ) {
|
|
this.scrollParent.scrollTop( scrollTop -
|
|
speed( scrollSensitivity - yTop ) );
|
|
}
|
|
|
|
// Handle horizontal scrolling
|
|
if ( xRight < scrollSensitivity ) {
|
|
this.scrollParent.scrollLeft( scrollLeft +
|
|
speed( scrollSensitivity - xRight ) );
|
|
} else if ( xLeft < scrollSensitivity ) {
|
|
this.scrollParent.scrollLeft( scrollLeft -
|
|
speed( scrollSensitivity - xLeft ) );
|
|
}
|
|
},
|
|
|
|
// Uses event to determine new position of draggable, before any override from callbacks
|
|
// TODO: handle absolute element inside relative parent like a relative element
|
|
_preparePosition: function( pointerPosition ) {
|
|
var leftDiff = pointerPosition.x - this.originalPointer.x,
|
|
topDiff = pointerPosition.y - this.originalPointer.y,
|
|
newLeft = leftDiff + this.startPosition.left,
|
|
newTop = topDiff + this.startPosition.top;
|
|
|
|
// Save off new values for .css() in various callbacks using this function
|
|
this.position = {
|
|
left: newLeft,
|
|
top: newTop
|
|
};
|
|
|
|
// Save off values to compare user override against automatic coordinates
|
|
this.tempPosition = {
|
|
left: newLeft,
|
|
top: newTop
|
|
};
|
|
|
|
// Refresh offset cache with new positions
|
|
this.offset.left = this.startOffset.left + leftDiff;
|
|
this.offset.top = this.startOffset.top + topDiff;
|
|
},
|
|
|
|
// Places draggable where event, or user via event/callback, indicates
|
|
_setCss: function() {
|
|
var newLeft = this.position.left,
|
|
newTop = this.position.top;
|
|
|
|
// User overriding left/top so shortcut math is no longer valid
|
|
if ( this.tempPosition.left !== this.position.left ||
|
|
this.tempPosition.top !== this.position.top ) {
|
|
// Reset offset based on difference of expected and overridden values
|
|
this.offset.left += newLeft - this.tempPosition.left;
|
|
this.offset.top += newTop - this.tempPosition.top;
|
|
}
|
|
|
|
// TODO: does this work with nested scrollable parents?
|
|
if ( this.cssPosition !== "fixed" ) {
|
|
newLeft += this.scrollParent.scrollLeft();
|
|
newTop += this.scrollParent.scrollTop();
|
|
}
|
|
|
|
this.dragEl.css({
|
|
left: newLeft,
|
|
top: newTop
|
|
});
|
|
},
|
|
|
|
_originalHash: function( pointerPosition ) {
|
|
var ret = {
|
|
position: this.position,
|
|
offset: copy( this.offset ),
|
|
pointer: copy( pointerPosition )
|
|
};
|
|
|
|
if ( this.options.helper ) {
|
|
ret.helper = this.dragEl;
|
|
}
|
|
|
|
return ret;
|
|
},
|
|
|
|
_fullHash: function( pointerPosition ) {
|
|
return $.extend( this._originalHash( pointerPosition ), {
|
|
originalPosition: copy( this.originalPosition ),
|
|
originalOffset: copy( this.originalOffset ),
|
|
originalPointer: copy( this.originalPointer )
|
|
});
|
|
},
|
|
|
|
_blockFrames: function() {
|
|
|
|
this.iframeBlocks = this.document.find( "iframe" ).map(function() {
|
|
var iframe = $( this ),
|
|
iframeOffset = iframe.offset();
|
|
|
|
return $( "<div>" )
|
|
.css({
|
|
position: "absolute",
|
|
width: iframe.outerWidth(),
|
|
height: iframe.outerHeight(),
|
|
top: iframeOffset.top,
|
|
left: iframeOffset.left
|
|
})
|
|
.appendTo( iframe.parent() )[0];
|
|
});
|
|
},
|
|
|
|
_unblockFrames: function() {
|
|
if ( this.iframeBlocks ) {
|
|
this.iframeBlocks.remove();
|
|
delete this.iframeBlocks;
|
|
}
|
|
},
|
|
|
|
_destroy: function() {
|
|
this.element.removeClass( "ui-sortable" );
|
|
this._super();
|
|
}
|
|
});
|
|
})( jQuery ); |