mirror of
https://github.com/jquery/jquery-ui.git
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370 lines
11 KiB
JavaScript
370 lines
11 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 = $.fn.position;
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$.position = {
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scrollbarWidth: function() {
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var w1, w2,
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div = $( "<div style='display:block;width:50px;height:50px;overflow:hidden;'><div style='height:100px;width:auto;'></div></div>" ),
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innerDiv = div.children()[0];
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$( "body" ).append( div );
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w1 = innerDiv.offsetWidth;
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div.css( "overflow", "scroll" );
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w2 = innerDiv.offsetWidth;
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if ( w1 === w2 ) {
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w2 = div[0].clientWidth;
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}
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div.remove();
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return w1 - w2;
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},
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getScrollInfo: function( within ) {
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var that = within[0],
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scrollHeight = within.height() < that.scrollHeight,
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scrollWidth = within.width() < that.scrollWidth,
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scrollbarWidth = $.position.scrollbarWidth();
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return {
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height: scrollHeight ? scrollbarWidth : 0,
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width : scrollWidth ? scrollbarWidth : 0
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};
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}
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};
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$.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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within = $( options.within || window ),
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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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scrollInfo = $.position.getScrollInfo( within ),
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collisionWidth = elemWidth + marginLeft +
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( parseInt( $.curCSS( this, "marginRight", true ) ) || 0 ) + scrollInfo.width,
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collisionHeight = elemHeight + marginTop +
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( parseInt( $.curCSS( this, "marginBottom", true ) ) || 0 ) + scrollInfo.height,
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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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within: within,
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elem : elem
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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 within = data.within,
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win = $( window ),
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isWindow = $.isWindow( data.within[0] ),
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withinOffset = isWindow ? win.scrollLeft() : within.offset().left,
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outerWidth = isWindow ? win.width() : within.outerWidth(),
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overLeft = withinOffset - data.collisionPosition.left,
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overRight = data.collisionPosition.left + data.collisionWidth - outerWidth - withinOffset;
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// element is wider than window or too far left -> align with left edge
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if ( data.collisionWidth > outerWidth || overLeft > 0 ) {
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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 -= 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 within = data.within,
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win = $( window ),
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isWindow = $.isWindow( data.within[0] ),
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withinOffset = isWindow ? win.scrollTop() : within.offset().top,
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outerHeight = isWindow ? win.height() : within.outerHeight(),
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overTop = withinOffset - data.collisionPosition.top,
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overBottom = data.collisionPosition.top + data.collisionHeight - outerHeight - withinOffset;
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// element is taller than window or too far up -> align with top edge
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if ( data.collisionHeight > outerHeight || overTop > 0 ) {
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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 -= 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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data.elem
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.removeClass( "ui-flipped-left ui-flipped-right" );
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var within = data.within,
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win = $( window ),
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isWindow = $.isWindow( data.within[0] ),
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withinOffset = isWindow ? 0 : within.offset().left,
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outerWidth = isWindow ? within.width() : within.outerWidth(),
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overLeft = data.collisionPosition.left - withinOffset,
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overRight = data.collisionPosition.left + data.collisionWidth - outerWidth - withinOffset,
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left = data.my[ 0 ] === "left",
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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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if ( overLeft < 0 || overRight > 0 ) {
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data.elem
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.addClass( "ui-flipped-" + ( overLeft < 0 ? "right" : "left" ) );
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position.left += myOffset + atOffset + offset;
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}
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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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data.elem
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.removeClass( "ui-flipped-top ui-flipped-bottom" );
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var within = data.within,
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win = $( window ),
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isWindow = $.isWindow( data.within[0] ),
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withinOffset = isWindow ? 0 : within.offset().top,
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outerHeight = isWindow ? within.height() : within.outerHeight(),
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overTop = data.collisionPosition.top - withinOffset,
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overBottom = data.collisionPosition.top + data.collisionHeight - outerHeight - withinOffset,
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top = data.my[ 1 ] === "top",
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myOffset = 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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if ( overTop < 0 || overBottom > 0 ) {
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data.elem
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.addClass( "ui-flipped-" + ( overTop < 0 ? "bottom" : "top" ) );
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position.top += myOffset + atOffset + offset;
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}
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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 || !options.offset ) {
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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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