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1 /* global screenReaderText */ |
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2 /** |
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3 * Theme functions file. |
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4 * |
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5 * Contains handlers for navigation and widget area. |
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6 */ |
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7 |
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8 ( function( $ ) { |
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9 var $body, $window, $sidebar, adminbarOffset, top = false, |
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10 bottom = false, windowWidth, windowHeight, lastWindowPos = 0, |
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11 topOffset = 0, bodyHeight, sidebarHeight, resizeTimer, |
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12 secondary, button; |
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13 |
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14 // Add dropdown toggle that display child menu items. |
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15 $( '.main-navigation .menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' ); |
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16 |
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17 // Toggle buttons and submenu items with active children menu items. |
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18 $( '.main-navigation .current-menu-ancestor > button' ).addClass( 'toggle-on' ); |
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19 $( '.main-navigation .current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' ); |
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20 |
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21 $( '.dropdown-toggle' ).click( function( e ) { |
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22 var _this = $( this ); |
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23 e.preventDefault(); |
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24 _this.toggleClass( 'toggle-on' ); |
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25 _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' ); |
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26 _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' ); |
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27 _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand ); |
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28 } ); |
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29 |
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30 secondary = $( '#secondary' ); |
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31 button = $( '.site-branding' ).find( '.secondary-toggle' ); |
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32 |
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33 // Enable menu toggle for small screens. |
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34 ( function() { |
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35 var menu, widgets, social; |
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36 if ( ! secondary || ! button ) { |
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37 return; |
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38 } |
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39 |
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40 // Hide button if there are no widgets and the menus are missing or empty. |
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41 menu = secondary.find( '.nav-menu' ); |
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42 widgets = secondary.find( '#widget-area' ); |
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43 social = secondary.find( '#social-navigation' ); |
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44 if ( ! widgets.length && ! social.length && ( ! menu || ! menu.children().length ) ) { |
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45 button.hide(); |
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46 return; |
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47 } |
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48 |
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49 button.on( 'click.twentyfifteen', function() { |
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50 secondary.toggleClass( 'toggled-on' ); |
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51 secondary.trigger( 'resize' ); |
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52 $( this ).toggleClass( 'toggled-on' ); |
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53 if ( $( this, secondary ).hasClass( 'toggled-on' ) ) { |
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54 $( this ).attr( 'aria-expanded', 'true' ); |
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55 secondary.attr( 'aria-expanded', 'true' ); |
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56 } else { |
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57 $( this ).attr( 'aria-expanded', 'false' ); |
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58 secondary.attr( 'aria-expanded', 'false' ); |
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59 } |
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60 } ); |
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61 } )(); |
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62 |
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63 /** |
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64 * @summary Add or remove ARIA attributes. |
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65 * Uses jQuery's width() function to determine the size of the window and add |
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66 * the default ARIA attributes for the menu toggle if it's visible. |
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67 * @since Twenty Fifteen 1.1 |
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68 */ |
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69 function onResizeARIA() { |
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70 if ( 955 > $window.width() ) { |
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71 button.attr( 'aria-expanded', 'false' ); |
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72 secondary.attr( 'aria-expanded', 'false' ); |
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73 button.attr( 'aria-controls', 'secondary' ); |
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74 } else { |
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75 button.removeAttr( 'aria-expanded' ); |
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76 secondary.removeAttr( 'aria-expanded' ); |
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77 button.removeAttr( 'aria-controls' ); |
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78 } |
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79 } |
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80 |
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81 // Sidebar scrolling. |
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82 function resize() { |
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83 windowWidth = $window.width(); |
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84 |
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85 if ( 955 > windowWidth ) { |
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86 top = bottom = false; |
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87 $sidebar.removeAttr( 'style' ); |
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88 } |
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89 } |
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90 |
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91 function scroll() { |
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92 var windowPos = $window.scrollTop(); |
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93 |
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94 if ( 955 > windowWidth ) { |
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95 return; |
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96 } |
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97 |
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98 sidebarHeight = $sidebar.height(); |
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99 windowHeight = $window.height(); |
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100 bodyHeight = $body.height(); |
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101 |
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102 if ( sidebarHeight + adminbarOffset > windowHeight ) { |
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103 if ( windowPos > lastWindowPos ) { |
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104 if ( top ) { |
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105 top = false; |
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106 topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; |
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107 $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); |
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108 } else if ( ! bottom && windowPos + windowHeight > sidebarHeight + $sidebar.offset().top && sidebarHeight + adminbarOffset < bodyHeight ) { |
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109 bottom = true; |
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110 $sidebar.attr( 'style', 'position: fixed; bottom: 0;' ); |
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111 } |
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112 } else if ( windowPos < lastWindowPos ) { |
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113 if ( bottom ) { |
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114 bottom = false; |
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115 topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; |
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116 $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); |
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117 } else if ( ! top && windowPos + adminbarOffset < $sidebar.offset().top ) { |
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118 top = true; |
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119 $sidebar.attr( 'style', 'position: fixed;' ); |
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120 } |
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121 } else { |
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122 top = bottom = false; |
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123 topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; |
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124 $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); |
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125 } |
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126 } else if ( ! top ) { |
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127 top = true; |
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128 $sidebar.attr( 'style', 'position: fixed;' ); |
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129 } |
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130 |
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131 lastWindowPos = windowPos; |
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132 } |
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133 |
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134 function resizeAndScroll() { |
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135 resize(); |
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136 scroll(); |
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137 } |
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138 |
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139 $( document ).ready( function() { |
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140 $body = $( document.body ); |
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141 $window = $( window ); |
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142 $sidebar = $( '#sidebar' ).first(); |
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143 adminbarOffset = $body.is( '.admin-bar' ) ? $( '#wpadminbar' ).height() : 0; |
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144 |
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145 $window |
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146 .on( 'scroll.twentyfifteen', scroll ) |
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147 .on( 'load.twentyfifteen', onResizeARIA ) |
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148 .on( 'resize.twentyfifteen', function() { |
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149 clearTimeout( resizeTimer ); |
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150 resizeTimer = setTimeout( resizeAndScroll, 500 ); |
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151 onResizeARIA(); |
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152 } ); |
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153 $sidebar.on( 'click.twentyfifteen keydown.twentyfifteen', 'button', resizeAndScroll ); |
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154 |
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155 resizeAndScroll(); |
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156 |
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157 for ( var i = 1; i < 6; i++ ) { |
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158 setTimeout( resizeAndScroll, 100 * i ); |
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159 } |
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160 } ); |
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161 |
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162 } )( jQuery ); |