251 lines
7.1 KiB
JavaScript
251 lines
7.1 KiB
JavaScript
/*
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* jQuery UI Position 1.8.5
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*
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* Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* http://jquery.org/license
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*
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* http://docs.jquery.com/UI/Position
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*/
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(function( $, undefined ) {
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$.ui = $.ui || {};
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var horizontalPositions = /left|center|right/,
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verticalPositions = /top|center|bottom/,
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center = "center",
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_position = $.fn.position,
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_offset = $.fn.offset;
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$.fn.position = function( options ) {
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if ( !options || !options.of ) {
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return _position.apply( this, arguments );
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}
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// make a copy, we don't want to modify arguments
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options = $.extend( {}, options );
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var target = $( options.of ),
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targetElem = target[0],
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collision = ( options.collision || "flip" ).split( " " ),
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offset = options.offset ? options.offset.split( " " ) : [ 0, 0 ],
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targetWidth,
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targetHeight,
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basePosition;
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if ( targetElem.nodeType === 9 ) {
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targetWidth = target.width();
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targetHeight = target.height();
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basePosition = { top: 0, left: 0 };
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} else if ( targetElem.scrollTo && targetElem.document ) {
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targetWidth = target.width();
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targetHeight = target.height();
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basePosition = { top: target.scrollTop(), left: target.scrollLeft() };
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} else if ( targetElem.preventDefault ) {
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// force left top to allow flipping
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options.at = "left top";
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targetWidth = targetHeight = 0;
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basePosition = { top: options.of.pageY, left: options.of.pageX };
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} else {
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targetWidth = target.outerWidth();
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targetHeight = target.outerHeight();
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basePosition = target.offset();
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}
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// force my and at to have valid horizontal and veritcal positions
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// if a value is missing or invalid, it will be converted to center
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$.each( [ "my", "at" ], function() {
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var pos = ( options[this] || "" ).split( " " );
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if ( pos.length === 1) {
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pos = horizontalPositions.test( pos[0] ) ?
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pos.concat( [center] ) :
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verticalPositions.test( pos[0] ) ?
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[ center ].concat( pos ) :
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[ center, center ];
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}
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pos[ 0 ] = horizontalPositions.test( pos[0] ) ? pos[ 0 ] : center;
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pos[ 1 ] = verticalPositions.test( pos[1] ) ? pos[ 1 ] : center;
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options[ this ] = pos;
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});
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// normalize collision option
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if ( collision.length === 1 ) {
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collision[ 1 ] = collision[ 0 ];
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}
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// normalize offset option
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offset[ 0 ] = parseInt( offset[0], 10 ) || 0;
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if ( offset.length === 1 ) {
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offset[ 1 ] = offset[ 0 ];
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}
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offset[ 1 ] = parseInt( offset[1], 10 ) || 0;
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if ( options.at[0] === "right" ) {
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basePosition.left += targetWidth;
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} else if (options.at[0] === center ) {
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basePosition.left += targetWidth / 2;
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}
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if ( options.at[1] === "bottom" ) {
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basePosition.top += targetHeight;
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} else if ( options.at[1] === center ) {
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basePosition.top += targetHeight / 2;
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}
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basePosition.left += offset[ 0 ];
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basePosition.top += offset[ 1 ];
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return this.each(function() {
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var elem = $( this ),
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elemWidth = elem.outerWidth(),
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elemHeight = elem.outerHeight(),
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marginLeft = parseInt( $.curCSS( this, "marginLeft", true ) ) || 0,
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marginTop = parseInt( $.curCSS( this, "marginTop", true ) ) || 0,
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collisionWidth = elemWidth + marginLeft +
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parseInt( $.curCSS( this, "marginRight", true ) ) || 0,
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collisionHeight = elemHeight + marginTop +
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parseInt( $.curCSS( this, "marginBottom", true ) ) || 0,
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position = $.extend( {}, basePosition ),
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collisionPosition;
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if ( options.my[0] === "right" ) {
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position.left -= elemWidth;
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} else if ( options.my[0] === center ) {
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position.left -= elemWidth / 2;
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}
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if ( options.my[1] === "bottom" ) {
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position.top -= elemHeight;
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} else if ( options.my[1] === center ) {
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position.top -= elemHeight / 2;
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}
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// prevent fractions (see #5280)
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position.left = parseInt( position.left );
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position.top = parseInt( position.top );
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collisionPosition = {
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left: position.left - marginLeft,
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top: position.top - marginTop
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};
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$.each( [ "left", "top" ], function( i, dir ) {
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if ( $.ui.position[ collision[i] ] ) {
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$.ui.position[ collision[i] ][ dir ]( position, {
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targetWidth: targetWidth,
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targetHeight: targetHeight,
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elemWidth: elemWidth,
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elemHeight: elemHeight,
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collisionPosition: collisionPosition,
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collisionWidth: collisionWidth,
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collisionHeight: collisionHeight,
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offset: offset,
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my: options.my,
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at: options.at
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});
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}
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});
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if ( $.fn.bgiframe ) {
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elem.bgiframe();
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}
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elem.offset( $.extend( position, { using: options.using } ) );
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});
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};
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$.ui.position = {
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fit: {
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left: function( position, data ) {
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var win = $( window ),
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over = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft();
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position.left = over > 0 ? position.left - over : Math.max( position.left - data.collisionPosition.left, position.left );
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},
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top: function( position, data ) {
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var win = $( window ),
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over = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop();
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position.top = over > 0 ? position.top - over : Math.max( position.top - data.collisionPosition.top, position.top );
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}
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},
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flip: {
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left: function( position, data ) {
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if ( data.at[0] === center ) {
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return;
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}
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var win = $( window ),
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over = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft(),
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myOffset = data.my[ 0 ] === "left" ?
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-data.elemWidth :
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data.my[ 0 ] === "right" ?
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data.elemWidth :
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0,
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atOffset = data.at[ 0 ] === "left" ?
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data.targetWidth :
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-data.targetWidth,
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offset = -2 * data.offset[ 0 ];
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position.left += data.collisionPosition.left < 0 ?
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myOffset + atOffset + offset :
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over > 0 ?
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myOffset + atOffset + offset :
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0;
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},
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top: function( position, data ) {
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if ( data.at[1] === center ) {
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return;
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}
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var win = $( window ),
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over = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop(),
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myOffset = data.my[ 1 ] === "top" ?
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-data.elemHeight :
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data.my[ 1 ] === "bottom" ?
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data.elemHeight :
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0,
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atOffset = data.at[ 1 ] === "top" ?
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data.targetHeight :
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-data.targetHeight,
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offset = -2 * data.offset[ 1 ];
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position.top += data.collisionPosition.top < 0 ?
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myOffset + atOffset + offset :
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over > 0 ?
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myOffset + atOffset + offset :
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0;
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}
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}
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};
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// offset setter from jQuery 1.4
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if ( !$.offset.setOffset ) {
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$.offset.setOffset = function( elem, options ) {
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// set position first, in-case top/left are set even on static elem
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if ( /static/.test( $.curCSS( elem, "position" ) ) ) {
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elem.style.position = "relative";
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}
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var curElem = $( elem ),
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curOffset = curElem.offset(),
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curTop = parseInt( $.curCSS( elem, "top", true ), 10 ) || 0,
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curLeft = parseInt( $.curCSS( elem, "left", true ), 10) || 0,
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props = {
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top: (options.top - curOffset.top) + curTop,
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left: (options.left - curOffset.left) + curLeft
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};
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if ( 'using' in options ) {
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options.using.call( elem, props );
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} else {
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curElem.css( props );
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}
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};
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$.fn.offset = function( options ) {
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var elem = this[ 0 ];
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if ( !elem || !elem.ownerDocument ) { return null; }
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if ( options ) {
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return this.each(function() {
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$.offset.setOffset( this, options );
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});
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}
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return _offset.call( this );
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};
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}
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}( jQuery ));
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