1 | /* |
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2 | * jQuery UI Position 1.8.17 |
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3 | * |
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4 | * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about) |
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5 | * Dual licensed under the MIT or GPL Version 2 licenses. |
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6 | * http://jquery.org/license |
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7 | * |
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8 | * http://docs.jquery.com/UI/Position |
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9 | */ |
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10 | (function( $, undefined ) { |
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11 | |
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12 | $.ui = $.ui || {}; |
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13 | |
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14 | var horizontalPositions = /left|center|right/, |
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15 | verticalPositions = /top|center|bottom/, |
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16 | center = "center", |
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17 | support = {}, |
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18 | _position = $.fn.position, |
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19 | _offset = $.fn.offset; |
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20 | |
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21 | $.fn.position = function( options ) { |
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22 | if ( !options || !options.of ) { |
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23 | return _position.apply( this, arguments ); |
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24 | } |
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25 | |
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26 | // make a copy, we don't want to modify arguments |
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27 | options = $.extend( {}, options ); |
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28 | |
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29 | var target = $( options.of ), |
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30 | targetElem = target[0], |
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31 | collision = ( options.collision || "flip" ).split( " " ), |
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32 | offset = options.offset ? options.offset.split( " " ) : [ 0, 0 ], |
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33 | targetWidth, |
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34 | targetHeight, |
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35 | basePosition; |
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36 | |
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37 | if ( targetElem.nodeType === 9 ) { |
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38 | targetWidth = target.width(); |
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39 | targetHeight = target.height(); |
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40 | basePosition = { top: 0, left: 0 }; |
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41 | // TODO: use $.isWindow() in 1.9 |
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42 | } else if ( targetElem.setTimeout ) { |
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43 | targetWidth = target.width(); |
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44 | targetHeight = target.height(); |
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45 | basePosition = { top: target.scrollTop(), left: target.scrollLeft() }; |
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46 | } else if ( targetElem.preventDefault ) { |
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47 | // force left top to allow flipping |
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48 | options.at = "left top"; |
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49 | targetWidth = targetHeight = 0; |
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50 | basePosition = { top: options.of.pageY, left: options.of.pageX }; |
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51 | } else { |
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52 | targetWidth = target.outerWidth(); |
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53 | targetHeight = target.outerHeight(); |
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54 | basePosition = target.offset(); |
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55 | } |
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56 | |
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57 | // force my and at to have valid horizontal and veritcal positions |
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58 | // if a value is missing or invalid, it will be converted to center |
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59 | $.each( [ "my", "at" ], function() { |
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60 | var pos = ( options[this] || "" ).split( " " ); |
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61 | if ( pos.length === 1) { |
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62 | pos = horizontalPositions.test( pos[0] ) ? |
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63 | pos.concat( [center] ) : |
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64 | verticalPositions.test( pos[0] ) ? |
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65 | [ center ].concat( pos ) : |
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66 | [ center, center ]; |
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67 | } |
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68 | pos[ 0 ] = horizontalPositions.test( pos[0] ) ? pos[ 0 ] : center; |
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69 | pos[ 1 ] = verticalPositions.test( pos[1] ) ? pos[ 1 ] : center; |
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70 | options[ this ] = pos; |
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71 | }); |
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72 | |
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73 | // normalize collision option |
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74 | if ( collision.length === 1 ) { |
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75 | collision[ 1 ] = collision[ 0 ]; |
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76 | } |
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77 | |
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78 | // normalize offset option |
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79 | offset[ 0 ] = parseInt( offset[0], 10 ) || 0; |
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80 | if ( offset.length === 1 ) { |
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81 | offset[ 1 ] = offset[ 0 ]; |
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82 | } |
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83 | offset[ 1 ] = parseInt( offset[1], 10 ) || 0; |
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84 | |
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85 | if ( options.at[0] === "right" ) { |
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86 | basePosition.left += targetWidth; |
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87 | } else if ( options.at[0] === center ) { |
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88 | basePosition.left += targetWidth / 2; |
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89 | } |
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90 | |
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91 | if ( options.at[1] === "bottom" ) { |
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92 | basePosition.top += targetHeight; |
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93 | } else if ( options.at[1] === center ) { |
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94 | basePosition.top += targetHeight / 2; |
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95 | } |
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96 | |
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97 | basePosition.left += offset[ 0 ]; |
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98 | basePosition.top += offset[ 1 ]; |
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99 | |
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100 | return this.each(function() { |
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101 | var elem = $( this ), |
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102 | elemWidth = elem.outerWidth(), |
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103 | elemHeight = elem.outerHeight(), |
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104 | marginLeft = parseInt( $.curCSS( this, "marginLeft", true ) ) || 0, |
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105 | marginTop = parseInt( $.curCSS( this, "marginTop", true ) ) || 0, |
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106 | collisionWidth = elemWidth + marginLeft + |
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107 | ( parseInt( $.curCSS( this, "marginRight", true ) ) || 0 ), |
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108 | collisionHeight = elemHeight + marginTop + |
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109 | ( parseInt( $.curCSS( this, "marginBottom", true ) ) || 0 ), |
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110 | position = $.extend( {}, basePosition ), |
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111 | collisionPosition; |
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112 | |
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113 | if ( options.my[0] === "right" ) { |
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114 | position.left -= elemWidth; |
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115 | } else if ( options.my[0] === center ) { |
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116 | position.left -= elemWidth / 2; |
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117 | } |
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118 | |
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119 | if ( options.my[1] === "bottom" ) { |
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120 | position.top -= elemHeight; |
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121 | } else if ( options.my[1] === center ) { |
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122 | position.top -= elemHeight / 2; |
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123 | } |
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124 | |
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125 | // prevent fractions if jQuery version doesn't support them (see #5280) |
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126 | if ( !support.fractions ) { |
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127 | position.left = Math.round( position.left ); |
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128 | position.top = Math.round( position.top ); |
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129 | } |
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130 | |
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131 | collisionPosition = { |
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132 | left: position.left - marginLeft, |
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133 | top: position.top - marginTop |
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134 | }; |
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135 | |
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136 | $.each( [ "left", "top" ], function( i, dir ) { |
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137 | if ( $.ui.position[ collision[i] ] ) { |
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138 | $.ui.position[ collision[i] ][ dir ]( position, { |
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139 | targetWidth: targetWidth, |
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140 | targetHeight: targetHeight, |
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141 | elemWidth: elemWidth, |
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142 | elemHeight: elemHeight, |
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143 | collisionPosition: collisionPosition, |
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144 | collisionWidth: collisionWidth, |
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145 | collisionHeight: collisionHeight, |
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146 | offset: offset, |
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147 | my: options.my, |
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148 | at: options.at |
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149 | }); |
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150 | } |
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151 | }); |
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152 | |
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153 | if ( $.fn.bgiframe ) { |
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154 | elem.bgiframe(); |
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155 | } |
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156 | elem.offset( $.extend( position, { using: options.using } ) ); |
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157 | }); |
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158 | }; |
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159 | |
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160 | $.ui.position = { |
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161 | fit: { |
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162 | left: function( position, data ) { |
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163 | var win = $( window ), |
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164 | over = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft(); |
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165 | position.left = over > 0 ? position.left - over : Math.max( position.left - data.collisionPosition.left, position.left ); |
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166 | }, |
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167 | top: function( position, data ) { |
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168 | var win = $( window ), |
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169 | over = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop(); |
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170 | position.top = over > 0 ? position.top - over : Math.max( position.top - data.collisionPosition.top, position.top ); |
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171 | } |
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172 | }, |
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173 | |
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174 | flip: { |
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175 | left: function( position, data ) { |
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176 | if ( data.at[0] === center ) { |
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177 | return; |
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178 | } |
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179 | var win = $( window ), |
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180 | over = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft(), |
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181 | myOffset = data.my[ 0 ] === "left" ? |
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182 | -data.elemWidth : |
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183 | data.my[ 0 ] === "right" ? |
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184 | data.elemWidth : |
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185 | 0, |
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186 | atOffset = data.at[ 0 ] === "left" ? |
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187 | data.targetWidth : |
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188 | -data.targetWidth, |
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189 | offset = -2 * data.offset[ 0 ]; |
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190 | position.left += data.collisionPosition.left < 0 ? |
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191 | myOffset + atOffset + offset : |
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192 | over > 0 ? |
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193 | myOffset + atOffset + offset : |
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194 | 0; |
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195 | }, |
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196 | top: function( position, data ) { |
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197 | if ( data.at[1] === center ) { |
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198 | return; |
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199 | } |
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200 | var win = $( window ), |
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201 | over = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop(), |
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202 | myOffset = data.my[ 1 ] === "top" ? |
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203 | -data.elemHeight : |
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204 | data.my[ 1 ] === "bottom" ? |
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205 | data.elemHeight : |
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206 | 0, |
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207 | atOffset = data.at[ 1 ] === "top" ? |
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208 | data.targetHeight : |
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209 | -data.targetHeight, |
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210 | offset = -2 * data.offset[ 1 ]; |
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211 | position.top += data.collisionPosition.top < 0 ? |
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212 | myOffset + atOffset + offset : |
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213 | over > 0 ? |
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214 | myOffset + atOffset + offset : |
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215 | 0; |
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216 | } |
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217 | } |
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218 | }; |
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219 | |
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220 | // offset setter from jQuery 1.4 |
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221 | if ( !$.offset.setOffset ) { |
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222 | $.offset.setOffset = function( elem, options ) { |
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223 | // set position first, in-case top/left are set even on static elem |
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224 | if ( /static/.test( $.curCSS( elem, "position" ) ) ) { |
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225 | elem.style.position = "relative"; |
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226 | } |
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227 | var curElem = $( elem ), |
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228 | curOffset = curElem.offset(), |
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229 | curTop = parseInt( $.curCSS( elem, "top", true ), 10 ) || 0, |
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230 | curLeft = parseInt( $.curCSS( elem, "left", true ), 10) || 0, |
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231 | props = { |
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232 | top: (options.top - curOffset.top) + curTop, |
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233 | left: (options.left - curOffset.left) + curLeft |
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234 | }; |
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235 | |
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236 | if ( 'using' in options ) { |
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237 | options.using.call( elem, props ); |
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238 | } else { |
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239 | curElem.css( props ); |
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240 | } |
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241 | }; |
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242 | |
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243 | $.fn.offset = function( options ) { |
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244 | var elem = this[ 0 ]; |
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245 | if ( !elem || !elem.ownerDocument ) { return null; } |
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246 | if ( options ) { |
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247 | return this.each(function() { |
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248 | $.offset.setOffset( this, options ); |
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249 | }); |
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250 | } |
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251 | return _offset.call( this ); |
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252 | }; |
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253 | } |
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254 | |
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255 | // fraction support test (older versions of jQuery don't support fractions) |
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256 | (function () { |
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257 | var body = document.getElementsByTagName( "body" )[ 0 ], |
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258 | div = document.createElement( "div" ), |
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259 | testElement, testElementParent, testElementStyle, offset, offsetTotal; |
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260 | |
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261 | //Create a "fake body" for testing based on method used in jQuery.support |
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262 | testElement = document.createElement( body ? "div" : "body" ); |
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263 | testElementStyle = { |
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264 | visibility: "hidden", |
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265 | width: 0, |
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266 | height: 0, |
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267 | border: 0, |
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268 | margin: 0, |
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269 | background: "none" |
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270 | }; |
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271 | if ( body ) { |
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272 | jQuery.extend( testElementStyle, { |
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273 | position: "absolute", |
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274 | left: "-1000px", |
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275 | top: "-1000px" |
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276 | }); |
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277 | } |
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278 | for ( var i in testElementStyle ) { |
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279 | testElement.style[ i ] = testElementStyle[ i ]; |
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280 | } |
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281 | testElement.appendChild( div ); |
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282 | testElementParent = body || document.documentElement; |
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283 | testElementParent.insertBefore( testElement, testElementParent.firstChild ); |
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284 | |
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285 | div.style.cssText = "position: absolute; left: 10.7432222px; top: 10.432325px; height: 30px; width: 201px;"; |
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286 | |
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287 | offset = $( div ).offset( function( _, offset ) { |
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288 | return offset; |
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289 | }).offset(); |
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290 | |
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291 | testElement.innerHTML = ""; |
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292 | testElementParent.removeChild( testElement ); |
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293 | |
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294 | offsetTotal = offset.top + offset.left + ( body ? 2000 : 0 ); |
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295 | support.fractions = offsetTotal > 21 && offsetTotal < 22; |
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296 | })(); |
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297 | |
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298 | }( jQuery )); |
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