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 function initMainNavigation( container ) { |
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15 // Add dropdown toggle that display child menu items. |
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16 container.find( '.menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' ); |
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17 |
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18 // Toggle buttons and submenu items with active children menu items. |
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19 container.find( '.current-menu-ancestor > button' ).addClass( 'toggle-on' ); |
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20 container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' ); |
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21 |
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22 container.find( '.dropdown-toggle' ).click( function( e ) { |
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23 var _this = $( this ); |
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24 e.preventDefault(); |
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25 _this.toggleClass( 'toggle-on' ); |
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26 _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' ); |
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27 _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' ); |
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28 _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand ); |
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29 } ); |
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30 } |
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31 initMainNavigation( $( '.main-navigation' ) ); |
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32 |
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33 // Re-initialize the main navigation when it is updated, persisting any existing submenu expanded states. |
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34 $( document ).on( 'customize-preview-menu-refreshed', function( e, params ) { |
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35 if ( 'primary' === params.wpNavMenuArgs.theme_location ) { |
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36 initMainNavigation( params.newContainer ); |
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37 |
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38 // Re-sync expanded states from oldContainer. |
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39 params.oldContainer.find( '.dropdown-toggle.toggle-on' ).each(function() { |
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40 var containerId = $( this ).parent().prop( 'id' ); |
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41 $( params.newContainer ).find( '#' + containerId + ' > .dropdown-toggle' ).triggerHandler( 'click' ); |
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42 }); |
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43 } |
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44 }); |
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45 |
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46 secondary = $( '#secondary' ); |
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47 button = $( '.site-branding' ).find( '.secondary-toggle' ); |
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48 |
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49 // Enable menu toggle for small screens. |
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50 ( function() { |
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51 var menu, widgets, social; |
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52 if ( ! secondary.length || ! button.length ) { |
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53 return; |
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54 } |
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55 |
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56 // Hide button if there are no widgets and the menus are missing or empty. |
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57 menu = secondary.find( '.nav-menu' ); |
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58 widgets = secondary.find( '#widget-area' ); |
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59 social = secondary.find( '#social-navigation' ); |
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60 if ( ! widgets.length && ! social.length && ( ! menu.length || ! menu.children().length ) ) { |
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61 button.hide(); |
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62 return; |
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63 } |
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64 |
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65 button.on( 'click.twentyfifteen', function() { |
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66 secondary.toggleClass( 'toggled-on' ); |
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67 secondary.trigger( 'resize' ); |
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68 $( this ).toggleClass( 'toggled-on' ); |
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69 if ( $( this, secondary ).hasClass( 'toggled-on' ) ) { |
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70 $( this ).attr( 'aria-expanded', 'true' ); |
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71 secondary.attr( 'aria-expanded', 'true' ); |
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72 } else { |
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73 $( this ).attr( 'aria-expanded', 'false' ); |
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74 secondary.attr( 'aria-expanded', 'false' ); |
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75 } |
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76 } ); |
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77 } )(); |
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78 |
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79 /** |
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80 * @summary Add or remove ARIA attributes. |
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81 * Uses jQuery's width() function to determine the size of the window and add |
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82 * the default ARIA attributes for the menu toggle if it's visible. |
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83 * @since Twenty Fifteen 1.1 |
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84 */ |
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85 function onResizeARIA() { |
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86 if ( 955 > $window.width() ) { |
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87 button.attr( 'aria-expanded', 'false' ); |
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88 secondary.attr( 'aria-expanded', 'false' ); |
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89 button.attr( 'aria-controls', 'secondary' ); |
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90 } else { |
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91 button.removeAttr( 'aria-expanded' ); |
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92 secondary.removeAttr( 'aria-expanded' ); |
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93 button.removeAttr( 'aria-controls' ); |
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94 } |
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95 } |
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96 |
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97 // Sidebar scrolling. |
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98 function resize() { |
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99 windowWidth = $window.width(); |
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100 |
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101 if ( 955 > windowWidth ) { |
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102 top = bottom = false; |
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103 $sidebar.removeAttr( 'style' ); |
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104 } |
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105 } |
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106 |
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107 function scroll() { |
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108 var windowPos = $window.scrollTop(); |
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109 |
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110 if ( 955 > windowWidth ) { |
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111 return; |
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112 } |
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113 |
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114 sidebarHeight = $sidebar.height(); |
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115 windowHeight = $window.height(); |
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116 bodyHeight = $body.height(); |
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117 |
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118 if ( sidebarHeight + adminbarOffset > windowHeight ) { |
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119 if ( windowPos > lastWindowPos ) { |
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120 if ( top ) { |
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121 top = false; |
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122 topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; |
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123 $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); |
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124 } else if ( ! bottom && windowPos + windowHeight > sidebarHeight + $sidebar.offset().top && sidebarHeight + adminbarOffset < bodyHeight ) { |
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125 bottom = true; |
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126 $sidebar.attr( 'style', 'position: fixed; bottom: 0;' ); |
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127 } |
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128 } else if ( windowPos < lastWindowPos ) { |
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129 if ( bottom ) { |
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130 bottom = false; |
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131 topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; |
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132 $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); |
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133 } else if ( ! top && windowPos + adminbarOffset < $sidebar.offset().top ) { |
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134 top = true; |
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135 $sidebar.attr( 'style', 'position: fixed;' ); |
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136 } |
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137 } else { |
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138 top = bottom = false; |
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139 topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; |
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140 $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); |
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141 } |
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142 } else if ( ! top ) { |
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143 top = true; |
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144 $sidebar.attr( 'style', 'position: fixed;' ); |
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145 } |
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146 |
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147 lastWindowPos = windowPos; |
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148 } |
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149 |
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150 function resizeAndScroll() { |
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151 resize(); |
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152 scroll(); |
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153 } |
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154 |
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155 $( document ).ready( function() { |
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156 $body = $( document.body ); |
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157 $window = $( window ); |
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158 $sidebar = $( '#sidebar' ).first(); |
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159 adminbarOffset = $body.is( '.admin-bar' ) ? $( '#wpadminbar' ).height() : 0; |
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160 |
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161 $window |
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162 .on( 'scroll.twentyfifteen', scroll ) |
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163 .on( 'load.twentyfifteen', onResizeARIA ) |
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164 .on( 'resize.twentyfifteen', function() { |
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165 clearTimeout( resizeTimer ); |
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166 resizeTimer = setTimeout( resizeAndScroll, 500 ); |
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167 onResizeARIA(); |
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168 } ); |
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169 $sidebar.on( 'click.twentyfifteen keydown.twentyfifteen', 'button', resizeAndScroll ); |
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170 |
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171 resizeAndScroll(); |
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172 |
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173 for ( var i = 1; i < 6; i++ ) { |
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174 setTimeout( resizeAndScroll, 100 * i ); |
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175 } |
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176 } ); |
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177 |
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178 } )( jQuery ); |
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