1 <?php |
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2 /** |
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3 * Twenty Seventeen functions and definitions |
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4 * |
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5 * @link https://developer.wordpress.org/themes/basics/theme-functions/ |
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6 * |
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7 * @package WordPress |
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8 * @subpackage Twenty_Seventeen |
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9 * @since 1.0 |
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10 */ |
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11 |
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12 /** |
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13 * Twenty Seventeen only works in WordPress 4.7 or later. |
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14 */ |
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15 if ( version_compare( $GLOBALS['wp_version'], '4.7-alpha', '<' ) ) { |
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16 require get_template_directory() . '/inc/back-compat.php'; |
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17 return; |
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18 } |
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19 |
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20 /** |
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21 * Sets up theme defaults and registers support for various WordPress features. |
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22 * |
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23 * Note that this function is hooked into the after_setup_theme hook, which |
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24 * runs before the init hook. The init hook is too late for some features, such |
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25 * as indicating support for post thumbnails. |
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26 */ |
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27 function twentyseventeen_setup() { |
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28 /* |
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29 * Make theme available for translation. |
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30 * Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentyseventeen |
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31 * If you're building a theme based on Twenty Seventeen, use a find and replace |
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32 * to change 'twentyseventeen' to the name of your theme in all the template files. |
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33 */ |
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34 load_theme_textdomain( 'twentyseventeen' ); |
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35 |
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36 // Add default posts and comments RSS feed links to head. |
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37 add_theme_support( 'automatic-feed-links' ); |
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38 |
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39 /* |
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40 * Let WordPress manage the document title. |
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41 * By adding theme support, we declare that this theme does not use a |
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42 * hard-coded <title> tag in the document head, and expect WordPress to |
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43 * provide it for us. |
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44 */ |
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45 add_theme_support( 'title-tag' ); |
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46 |
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47 /* |
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48 * Enable support for Post Thumbnails on posts and pages. |
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49 * |
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50 * @link https://developer.wordpress.org/themes/functionality/featured-images-post-thumbnails/ |
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51 */ |
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52 add_theme_support( 'post-thumbnails' ); |
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53 |
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54 add_image_size( 'twentyseventeen-featured-image', 2000, 1200, true ); |
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55 |
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56 add_image_size( 'twentyseventeen-thumbnail-avatar', 100, 100, true ); |
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57 |
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58 // Set the default content width. |
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59 $GLOBALS['content_width'] = 525; |
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60 |
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61 // This theme uses wp_nav_menu() in two locations. |
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62 register_nav_menus( array( |
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63 'top' => __( 'Top Menu', 'twentyseventeen' ), |
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64 'social' => __( 'Social Links Menu', 'twentyseventeen' ), |
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65 ) ); |
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66 |
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67 /* |
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68 * Switch default core markup for search form, comment form, and comments |
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69 * to output valid HTML5. |
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70 */ |
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71 add_theme_support( 'html5', array( |
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72 'comment-form', |
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73 'comment-list', |
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74 'gallery', |
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75 'caption', |
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76 ) ); |
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77 |
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78 /* |
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79 * Enable support for Post Formats. |
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80 * |
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81 * See: https://codex.wordpress.org/Post_Formats |
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82 */ |
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83 add_theme_support( 'post-formats', array( |
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84 'aside', |
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85 'image', |
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86 'video', |
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87 'quote', |
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88 'link', |
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89 'gallery', |
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90 'audio', |
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91 ) ); |
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92 |
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93 // Add theme support for Custom Logo. |
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94 add_theme_support( 'custom-logo', array( |
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95 'width' => 250, |
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96 'height' => 250, |
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97 'flex-width' => true, |
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98 ) ); |
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99 |
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100 // Add theme support for selective refresh for widgets. |
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101 add_theme_support( 'customize-selective-refresh-widgets' ); |
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102 |
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103 /* |
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104 * This theme styles the visual editor to resemble the theme style, |
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105 * specifically font, colors, and column width. |
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106 */ |
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107 add_editor_style( array( 'assets/css/editor-style.css', twentyseventeen_fonts_url() ) ); |
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108 |
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109 // Define and register starter content to showcase the theme on new sites. |
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110 $starter_content = array( |
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111 'widgets' => array( |
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112 // Place three core-defined widgets in the sidebar area. |
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113 'sidebar-1' => array( |
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114 'text_business_info', |
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115 'search', |
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116 'text_about', |
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117 ), |
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118 |
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119 // Add the core-defined business info widget to the footer 1 area. |
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120 'sidebar-2' => array( |
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121 'text_business_info', |
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122 ), |
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123 |
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124 // Put two core-defined widgets in the footer 2 area. |
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125 'sidebar-3' => array( |
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126 'text_about', |
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127 'search', |
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128 ), |
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129 ), |
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130 |
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131 // Specify the core-defined pages to create and add custom thumbnails to some of them. |
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132 'posts' => array( |
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133 'home', |
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134 'about' => array( |
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135 'thumbnail' => '{{image-sandwich}}', |
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136 ), |
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137 'contact' => array( |
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138 'thumbnail' => '{{image-espresso}}', |
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139 ), |
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140 'blog' => array( |
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141 'thumbnail' => '{{image-coffee}}', |
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142 ), |
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143 'homepage-section' => array( |
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144 'thumbnail' => '{{image-espresso}}', |
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145 ), |
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146 ), |
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147 |
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148 // Create the custom image attachments used as post thumbnails for pages. |
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149 'attachments' => array( |
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150 'image-espresso' => array( |
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151 'post_title' => _x( 'Espresso', 'Theme starter content', 'twentyseventeen' ), |
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152 'file' => 'assets/images/espresso.jpg', // URL relative to the template directory. |
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153 ), |
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154 'image-sandwich' => array( |
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155 'post_title' => _x( 'Sandwich', 'Theme starter content', 'twentyseventeen' ), |
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156 'file' => 'assets/images/sandwich.jpg', |
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157 ), |
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158 'image-coffee' => array( |
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159 'post_title' => _x( 'Coffee', 'Theme starter content', 'twentyseventeen' ), |
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160 'file' => 'assets/images/coffee.jpg', |
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161 ), |
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162 ), |
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163 |
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164 // Default to a static front page and assign the front and posts pages. |
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165 'options' => array( |
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166 'show_on_front' => 'page', |
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167 'page_on_front' => '{{home}}', |
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168 'page_for_posts' => '{{blog}}', |
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169 ), |
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170 |
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171 // Set the front page section theme mods to the IDs of the core-registered pages. |
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172 'theme_mods' => array( |
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173 'panel_1' => '{{homepage-section}}', |
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174 'panel_2' => '{{about}}', |
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175 'panel_3' => '{{blog}}', |
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176 'panel_4' => '{{contact}}', |
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177 ), |
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178 |
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179 // Set up nav menus for each of the two areas registered in the theme. |
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180 'nav_menus' => array( |
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181 // Assign a menu to the "top" location. |
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182 'top' => array( |
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183 'name' => __( 'Top Menu', 'twentyseventeen' ), |
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184 'items' => array( |
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185 'link_home', // Note that the core "home" page is actually a link in case a static front page is not used. |
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186 'page_about', |
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187 'page_blog', |
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188 'page_contact', |
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189 ), |
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190 ), |
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191 |
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192 // Assign a menu to the "social" location. |
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193 'social' => array( |
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194 'name' => __( 'Social Links Menu', 'twentyseventeen' ), |
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195 'items' => array( |
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196 'link_yelp', |
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197 'link_facebook', |
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198 'link_twitter', |
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199 'link_instagram', |
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200 'link_email', |
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201 ), |
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202 ), |
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203 ), |
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204 ); |
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205 |
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206 /** |
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207 * Filters Twenty Seventeen array of starter content. |
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208 * |
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209 * @since Twenty Seventeen 1.1 |
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210 * |
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211 * @param array $starter_content Array of starter content. |
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212 */ |
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213 $starter_content = apply_filters( 'twentyseventeen_starter_content', $starter_content ); |
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214 |
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215 add_theme_support( 'starter-content', $starter_content ); |
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216 } |
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217 add_action( 'after_setup_theme', 'twentyseventeen_setup' ); |
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218 |
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219 /** |
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220 * Set the content width in pixels, based on the theme's design and stylesheet. |
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221 * |
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222 * Priority 0 to make it available to lower priority callbacks. |
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223 * |
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224 * @global int $content_width |
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225 */ |
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226 function twentyseventeen_content_width() { |
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227 |
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228 $content_width = $GLOBALS['content_width']; |
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229 |
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230 // Get layout. |
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231 $page_layout = get_theme_mod( 'page_layout' ); |
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232 |
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233 // Check if layout is one column. |
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234 if ( 'one-column' === $page_layout ) { |
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235 if ( twentyseventeen_is_frontpage() ) { |
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236 $content_width = 644; |
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237 } elseif ( is_page() ) { |
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238 $content_width = 740; |
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239 } |
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240 } |
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241 |
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242 // Check if is single post and there is no sidebar. |
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243 if ( is_single() && ! is_active_sidebar( 'sidebar-1' ) ) { |
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244 $content_width = 740; |
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245 } |
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246 |
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247 /** |
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248 * Filter Twenty Seventeen content width of the theme. |
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249 * |
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250 * @since Twenty Seventeen 1.0 |
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251 * |
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252 * @param int $content_width Content width in pixels. |
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253 */ |
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254 $GLOBALS['content_width'] = apply_filters( 'twentyseventeen_content_width', $content_width ); |
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255 } |
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256 add_action( 'template_redirect', 'twentyseventeen_content_width', 0 ); |
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257 |
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258 /** |
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259 * Register custom fonts. |
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260 */ |
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261 function twentyseventeen_fonts_url() { |
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262 $fonts_url = ''; |
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263 |
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264 /* |
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265 * Translators: If there are characters in your language that are not |
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266 * supported by Libre Franklin, translate this to 'off'. Do not translate |
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267 * into your own language. |
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268 */ |
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269 $libre_franklin = _x( 'on', 'Libre Franklin font: on or off', 'twentyseventeen' ); |
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270 |
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271 if ( 'off' !== $libre_franklin ) { |
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272 $font_families = array(); |
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273 |
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274 $font_families[] = 'Libre Franklin:300,300i,400,400i,600,600i,800,800i'; |
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275 |
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276 $query_args = array( |
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277 'family' => urlencode( implode( '|', $font_families ) ), |
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278 'subset' => urlencode( 'latin,latin-ext' ), |
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279 ); |
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280 |
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281 $fonts_url = add_query_arg( $query_args, 'https://fonts.googleapis.com/css' ); |
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282 } |
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283 |
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284 return esc_url_raw( $fonts_url ); |
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285 } |
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286 |
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287 /** |
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288 * Add preconnect for Google Fonts. |
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289 * |
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290 * @since Twenty Seventeen 1.0 |
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291 * |
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292 * @param array $urls URLs to print for resource hints. |
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293 * @param string $relation_type The relation type the URLs are printed. |
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294 * @return array $urls URLs to print for resource hints. |
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295 */ |
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296 function twentyseventeen_resource_hints( $urls, $relation_type ) { |
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297 if ( wp_style_is( 'twentyseventeen-fonts', 'queue' ) && 'preconnect' === $relation_type ) { |
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298 $urls[] = array( |
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299 'href' => 'https://fonts.gstatic.com', |
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300 'crossorigin', |
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301 ); |
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302 } |
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303 |
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304 return $urls; |
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305 } |
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306 add_filter( 'wp_resource_hints', 'twentyseventeen_resource_hints', 10, 2 ); |
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307 |
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308 /** |
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309 * Register widget area. |
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310 * |
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311 * @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar |
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312 */ |
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313 function twentyseventeen_widgets_init() { |
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314 register_sidebar( array( |
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315 'name' => __( 'Blog Sidebar', 'twentyseventeen' ), |
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316 'id' => 'sidebar-1', |
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317 'description' => __( 'Add widgets here to appear in your sidebar on blog posts and archive pages.', 'twentyseventeen' ), |
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318 'before_widget' => '<section id="%1$s" class="widget %2$s">', |
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319 'after_widget' => '</section>', |
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320 'before_title' => '<h2 class="widget-title">', |
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321 'after_title' => '</h2>', |
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322 ) ); |
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323 |
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324 register_sidebar( array( |
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325 'name' => __( 'Footer 1', 'twentyseventeen' ), |
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326 'id' => 'sidebar-2', |
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327 'description' => __( 'Add widgets here to appear in your footer.', 'twentyseventeen' ), |
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328 'before_widget' => '<section id="%1$s" class="widget %2$s">', |
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329 'after_widget' => '</section>', |
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330 'before_title' => '<h2 class="widget-title">', |
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331 'after_title' => '</h2>', |
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332 ) ); |
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333 |
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334 register_sidebar( array( |
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335 'name' => __( 'Footer 2', 'twentyseventeen' ), |
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336 'id' => 'sidebar-3', |
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337 'description' => __( 'Add widgets here to appear in your footer.', 'twentyseventeen' ), |
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338 'before_widget' => '<section id="%1$s" class="widget %2$s">', |
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339 'after_widget' => '</section>', |
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340 'before_title' => '<h2 class="widget-title">', |
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341 'after_title' => '</h2>', |
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342 ) ); |
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343 } |
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344 add_action( 'widgets_init', 'twentyseventeen_widgets_init' ); |
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345 |
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346 /** |
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347 * Replaces "[...]" (appended to automatically generated excerpts) with ... and |
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348 * a 'Continue reading' link. |
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349 * |
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350 * @since Twenty Seventeen 1.0 |
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351 * |
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352 * @param string $link Link to single post/page. |
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353 * @return string 'Continue reading' link prepended with an ellipsis. |
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354 */ |
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355 function twentyseventeen_excerpt_more( $link ) { |
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356 if ( is_admin() ) { |
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357 return $link; |
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358 } |
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359 |
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360 $link = sprintf( '<p class="link-more"><a href="%1$s" class="more-link">%2$s</a></p>', |
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361 esc_url( get_permalink( get_the_ID() ) ), |
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362 /* translators: %s: Name of current post */ |
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363 sprintf( __( 'Continue reading<span class="screen-reader-text"> "%s"</span>', 'twentyseventeen' ), get_the_title( get_the_ID() ) ) |
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364 ); |
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365 return ' … ' . $link; |
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366 } |
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367 add_filter( 'excerpt_more', 'twentyseventeen_excerpt_more' ); |
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368 |
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369 /** |
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370 * Handles JavaScript detection. |
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371 * |
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372 * Adds a `js` class to the root `<html>` element when JavaScript is detected. |
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373 * |
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374 * @since Twenty Seventeen 1.0 |
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375 */ |
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376 function twentyseventeen_javascript_detection() { |
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377 echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n"; |
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378 } |
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379 add_action( 'wp_head', 'twentyseventeen_javascript_detection', 0 ); |
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380 |
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381 /** |
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382 * Add a pingback url auto-discovery header for singularly identifiable articles. |
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383 */ |
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384 function twentyseventeen_pingback_header() { |
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385 if ( is_singular() && pings_open() ) { |
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386 printf( '<link rel="pingback" href="%s">' . "\n", get_bloginfo( 'pingback_url' ) ); |
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387 } |
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388 } |
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389 add_action( 'wp_head', 'twentyseventeen_pingback_header' ); |
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390 |
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391 /** |
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392 * Display custom color CSS. |
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393 */ |
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394 function twentyseventeen_colors_css_wrap() { |
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395 if ( 'custom' !== get_theme_mod( 'colorscheme' ) && ! is_customize_preview() ) { |
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396 return; |
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397 } |
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398 |
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399 require_once( get_parent_theme_file_path( '/inc/color-patterns.php' ) ); |
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400 $hue = absint( get_theme_mod( 'colorscheme_hue', 250 ) ); |
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401 ?> |
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402 <style type="text/css" id="custom-theme-colors" <?php if ( is_customize_preview() ) { echo 'data-hue="' . $hue . '"'; } ?>> |
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403 <?php echo twentyseventeen_custom_colors_css(); ?> |
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404 </style> |
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405 <?php } |
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406 add_action( 'wp_head', 'twentyseventeen_colors_css_wrap' ); |
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407 |
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408 /** |
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409 * Enqueue scripts and styles. |
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410 */ |
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411 function twentyseventeen_scripts() { |
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412 // Add custom fonts, used in the main stylesheet. |
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413 wp_enqueue_style( 'twentyseventeen-fonts', twentyseventeen_fonts_url(), array(), null ); |
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414 |
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415 // Theme stylesheet. |
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416 wp_enqueue_style( 'twentyseventeen-style', get_stylesheet_uri() ); |
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417 |
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418 // Load the dark colorscheme. |
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419 if ( 'dark' === get_theme_mod( 'colorscheme', 'light' ) || is_customize_preview() ) { |
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420 wp_enqueue_style( 'twentyseventeen-colors-dark', get_theme_file_uri( '/assets/css/colors-dark.css' ), array( 'twentyseventeen-style' ), '1.0' ); |
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421 } |
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422 |
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423 // Load the Internet Explorer 9 specific stylesheet, to fix display issues in the Customizer. |
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424 if ( is_customize_preview() ) { |
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425 wp_enqueue_style( 'twentyseventeen-ie9', get_theme_file_uri( '/assets/css/ie9.css' ), array( 'twentyseventeen-style' ), '1.0' ); |
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426 wp_style_add_data( 'twentyseventeen-ie9', 'conditional', 'IE 9' ); |
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427 } |
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428 |
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429 // Load the Internet Explorer 8 specific stylesheet. |
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430 wp_enqueue_style( 'twentyseventeen-ie8', get_theme_file_uri( '/assets/css/ie8.css' ), array( 'twentyseventeen-style' ), '1.0' ); |
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431 wp_style_add_data( 'twentyseventeen-ie8', 'conditional', 'lt IE 9' ); |
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432 |
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433 // Load the html5 shiv. |
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434 wp_enqueue_script( 'html5', get_theme_file_uri( '/assets/js/html5.js' ), array(), '3.7.3' ); |
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435 wp_script_add_data( 'html5', 'conditional', 'lt IE 9' ); |
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436 |
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437 wp_enqueue_script( 'twentyseventeen-skip-link-focus-fix', get_theme_file_uri( '/assets/js/skip-link-focus-fix.js' ), array(), '1.0', true ); |
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438 |
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439 $twentyseventeen_l10n = array( |
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440 'quote' => twentyseventeen_get_svg( array( 'icon' => 'quote-right' ) ), |
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441 ); |
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442 |
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443 if ( has_nav_menu( 'top' ) ) { |
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444 wp_enqueue_script( 'twentyseventeen-navigation', get_theme_file_uri( '/assets/js/navigation.js' ), array( 'jquery' ), '1.0', true ); |
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445 $twentyseventeen_l10n['expand'] = __( 'Expand child menu', 'twentyseventeen' ); |
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446 $twentyseventeen_l10n['collapse'] = __( 'Collapse child menu', 'twentyseventeen' ); |
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447 $twentyseventeen_l10n['icon'] = twentyseventeen_get_svg( array( 'icon' => 'angle-down', 'fallback' => true ) ); |
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448 } |
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449 |
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450 wp_enqueue_script( 'twentyseventeen-global', get_theme_file_uri( '/assets/js/global.js' ), array( 'jquery' ), '1.0', true ); |
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451 |
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452 wp_enqueue_script( 'jquery-scrollto', get_theme_file_uri( '/assets/js/jquery.scrollTo.js' ), array( 'jquery' ), '2.1.2', true ); |
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453 |
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454 wp_localize_script( 'twentyseventeen-skip-link-focus-fix', 'twentyseventeenScreenReaderText', $twentyseventeen_l10n ); |
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455 |
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456 if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) { |
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457 wp_enqueue_script( 'comment-reply' ); |
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458 } |
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459 } |
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460 add_action( 'wp_enqueue_scripts', 'twentyseventeen_scripts' ); |
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461 |
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462 /** |
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463 * Add custom image sizes attribute to enhance responsive image functionality |
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464 * for content images. |
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465 * |
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466 * @since Twenty Seventeen 1.0 |
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467 * |
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468 * @param string $sizes A source size value for use in a 'sizes' attribute. |
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469 * @param array $size Image size. Accepts an array of width and height |
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470 * values in pixels (in that order). |
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471 * @return string A source size value for use in a content image 'sizes' attribute. |
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472 */ |
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473 function twentyseventeen_content_image_sizes_attr( $sizes, $size ) { |
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474 $width = $size[0]; |
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475 |
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476 if ( 740 <= $width ) { |
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477 $sizes = '(max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px'; |
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478 } |
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479 |
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480 if ( is_active_sidebar( 'sidebar-1' ) || is_archive() || is_search() || is_home() || is_page() ) { |
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481 if ( ! ( is_page() && 'one-column' === get_theme_mod( 'page_options' ) ) && 767 <= $width ) { |
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482 $sizes = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px'; |
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483 } |
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484 } |
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485 |
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486 return $sizes; |
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487 } |
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488 add_filter( 'wp_calculate_image_sizes', 'twentyseventeen_content_image_sizes_attr', 10, 2 ); |
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489 |
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490 /** |
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491 * Filter the `sizes` value in the header image markup. |
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492 * |
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493 * @since Twenty Seventeen 1.0 |
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494 * |
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495 * @param string $html The HTML image tag markup being filtered. |
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496 * @param object $header The custom header object returned by 'get_custom_header()'. |
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497 * @param array $attr Array of the attributes for the image tag. |
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498 * @return string The filtered header image HTML. |
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499 */ |
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500 function twentyseventeen_header_image_tag( $html, $header, $attr ) { |
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501 if ( isset( $attr['sizes'] ) ) { |
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502 $html = str_replace( $attr['sizes'], '100vw', $html ); |
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503 } |
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504 return $html; |
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505 } |
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506 add_filter( 'get_header_image_tag', 'twentyseventeen_header_image_tag', 10, 3 ); |
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507 |
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508 /** |
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509 * Add custom image sizes attribute to enhance responsive image functionality |
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510 * for post thumbnails. |
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511 * |
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512 * @since Twenty Seventeen 1.0 |
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513 * |
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514 * @param array $attr Attributes for the image markup. |
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515 * @param int $attachment Image attachment ID. |
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516 * @param array $size Registered image size or flat array of height and width dimensions. |
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517 * @return array The filtered attributes for the image markup. |
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518 */ |
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519 function twentyseventeen_post_thumbnail_sizes_attr( $attr, $attachment, $size ) { |
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520 if ( is_archive() || is_search() || is_home() ) { |
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521 $attr['sizes'] = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px'; |
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522 } else { |
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523 $attr['sizes'] = '100vw'; |
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524 } |
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525 |
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526 return $attr; |
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527 } |
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528 add_filter( 'wp_get_attachment_image_attributes', 'twentyseventeen_post_thumbnail_sizes_attr', 10, 3 ); |
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529 |
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530 /** |
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531 * Use front-page.php when Front page displays is set to a static page. |
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532 * |
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533 * @since Twenty Seventeen 1.0 |
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534 * |
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535 * @param string $template front-page.php. |
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536 * |
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537 * @return string The template to be used: blank if is_home() is true (defaults to index.php), else $template. |
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538 */ |
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539 function twentyseventeen_front_page_template( $template ) { |
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540 return is_home() ? '' : $template; |
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541 } |
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542 add_filter( 'frontpage_template', 'twentyseventeen_front_page_template' ); |
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543 |
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544 /** |
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545 * Modifies tag cloud widget arguments to display all tags in the same font size |
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546 * and use list format for better accessibility. |
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547 * |
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548 * @since Twenty Seventeen 1.4 |
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549 * |
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550 * @param array $args Arguments for tag cloud widget. |
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551 * @return array The filtered arguments for tag cloud widget. |
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552 */ |
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553 function twentyseventeen_widget_tag_cloud_args( $args ) { |
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554 $args['largest'] = 1; |
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555 $args['smallest'] = 1; |
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556 $args['unit'] = 'em'; |
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557 $args['format'] = 'list'; |
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558 |
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559 return $args; |
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560 } |
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561 add_filter( 'widget_tag_cloud_args', 'twentyseventeen_widget_tag_cloud_args' ); |
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562 |
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563 /** |
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564 * Implement the Custom Header feature. |
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565 */ |
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566 require get_parent_theme_file_path( '/inc/custom-header.php' ); |
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567 |
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568 /** |
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569 * Custom template tags for this theme. |
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570 */ |
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571 require get_parent_theme_file_path( '/inc/template-tags.php' ); |
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572 |
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573 /** |
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574 * Additional features to allow styling of the templates. |
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575 */ |
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576 require get_parent_theme_file_path( '/inc/template-functions.php' ); |
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577 |
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578 /** |
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579 * Customizer additions. |
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580 */ |
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581 require get_parent_theme_file_path( '/inc/customizer.php' ); |
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582 |
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583 /** |
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584 * SVG icons functions and filters. |
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585 */ |
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586 require get_parent_theme_file_path( '/inc/icon-functions.php' ); |
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