mirror of
https://github.com/jquery/jquery-ui.git
synced 2024-11-21 11:04:24 +00:00
301 lines
8.6 KiB
JavaScript
301 lines
8.6 KiB
JavaScript
/*
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* jQuery UI Position @VERSION
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*
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* Copyright 2011, 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 = $.ui || {};
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var rhorizontal = /left|center|right/,
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rvertical = /top|center|bottom/,
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roffset = /[+-]\d+%?/,
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rposition = /^\w+/,
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rpercent = /%$/,
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center = "center",
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_position = $.fn.position;
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$.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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offsets = {},
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atOffset,
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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 ( $.isWindow( targetElem ) ) {
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targetWidth = target.width();
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targetHeight = target.height();
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basePosition = { top: target.scrollTop(), left: target.scrollLeft() };
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} else if ( targetElem.preventDefault ) {
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// force left top to allow flipping
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options.at = "left top";
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targetWidth = targetHeight = 0;
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basePosition = { top: options.of.pageY, left: options.of.pageX };
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} else {
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targetWidth = target.outerWidth();
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targetHeight = target.outerHeight();
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basePosition = target.offset();
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}
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// force my and at to have valid horizontal and vertical positions
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// if a value is missing or invalid, it will be converted to center
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$.each( [ "my", "at" ], function() {
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var pos = ( options[ this ] || "" ).split( " " ),
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horizontalOffset,
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verticalOffset;
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if ( pos.length === 1) {
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pos = rhorizontal.test( pos[ 0 ] ) ?
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pos.concat( [ center ] ) :
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rvertical.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 ] = rhorizontal.test( pos[ 0 ] ) ? pos[ 0 ] : center;
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pos[ 1 ] = rvertical.test( pos[ 1 ] ) ? pos[ 1 ] : center;
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// calculate offsets
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horizontalOffset = roffset.exec( pos[ 0 ] );
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verticalOffset = roffset.exec( pos[ 1 ] );
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offsets[ this ] = [
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horizontalOffset ? horizontalOffset[ 0 ] : 0,
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verticalOffset ? verticalOffset[ 0 ] : 0
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];
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// reduce to just the positions without the offsets
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options[ this ] = [
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rposition.exec( pos[ 0 ] )[ 0 ],
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rposition.exec( pos[ 1 ] )[ 0 ]
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];
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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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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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atOffset = [
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parseInt( offsets.at[ 0 ], 10 ) *
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( rpercent.test( offsets.at[ 0 ] ) ? targetWidth / 100 : 1 ),
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parseInt( offsets.at[ 1 ], 10 ) *
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( rpercent.test( offsets.at[ 1 ] ) ? targetHeight / 100 : 1 )
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];
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basePosition.left += atOffset[ 0 ],
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basePosition.top += atOffset[ 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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myOffset = [
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parseInt( offsets.my[ 0 ], 10 ) *
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( rpercent.test( offsets.my[ 0 ] ) ? elem.outerWidth() / 100 : 1 ),
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parseInt( offsets.my[ 1 ], 10 ) *
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( rpercent.test( offsets.my[ 1 ] ) ? elem.outerHeight() / 100 : 1 )
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],
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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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position.left += myOffset[ 0 ];
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position.top += myOffset[ 1 ];
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// prevent fractions (see #5280)
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position.left = Math.round( position.left );
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position.top = Math.round( 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: [ atOffset[ 0 ] + myOffset[ 0 ], atOffset [ 1 ] + myOffset[ 1 ] ],
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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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overLeft = win.scrollLeft() - data.collisionPosition.left,
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overRight = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft();
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// element is wider than window or too far left -> align with left edge
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if ( data.collisionWidth > win.width() || overLeft > 0 ) {
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position.left = position.left + overLeft;
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// too far right -> align with right edge
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} else if ( overRight > 0 ) {
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position.left = position.left - overRight;
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// adjust based on position and margin
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} else {
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position.left = Math.max( position.left - data.collisionPosition.left, position.left );
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}
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},
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top: function( position, data ) {
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var win = $( window ),
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overTop = win.scrollTop() - data.collisionPosition.top,
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overBottom = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop();
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// element is taller than window or too far up -> align with top edge
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if ( data.collisionHeight > win.height() || overTop > 0 ) {
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position.top = position.top + overTop;
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// too far down -> align with bottom edge
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} else if ( overBottom > 0 ) {
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position.top = position.top - overBottom;
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// adjust based on position and margin
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} else {
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position.top = Math.max( position.top - data.collisionPosition.top, position.top );
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}
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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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// DEPRECATED
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if ( $.uiBackCompat !== false ) {
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// offset option
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(function( $ ) {
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var _position = $.fn.position;
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$.fn.position = function( options ) {
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if ( !options || !( "offset" in options ) ) {
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return _position.call( this, options );
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}
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var offset = options.offset.split( " " ),
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at = options.at.split( " " );
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if ( offset.length === 1 ) {
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offset[ 1 ] = offset[ 0 ];
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}
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if ( /^\d/.test( offset[ 0 ] ) ) {
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offset[ 0 ] = "+" + offset[ 0 ];
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}
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if ( /^\d/.test( offset[ 1 ] ) ) {
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offset[ 1 ] = "+" + offset[ 1 ];
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}
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if ( at.length === 1 ) {
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if ( /left|center|right/.test( at[ 0 ] ) ) {
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at[ 1 ] = "center";
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} else {
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at[ 1 ] = at[ 0 ];
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at[ 0 ] = "center";
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}
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}
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return _position.call( this, $.extend( options, {
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at: at[ 0 ] + offset[ 0 ] + " " + at[ 1 ] + offset[ 1 ],
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offset: undefined
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} ) );
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}
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}( jQuery ) );
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}
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}( jQuery ) );
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