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1 <?php |
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2 /** |
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3 * Twenty Thirteen functions and definitions |
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4 * |
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5 * Sets up the theme and provides some helper functions, which are used in the |
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6 * theme as custom template tags. Others are attached to action and filter |
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7 * hooks in WordPress to change core functionality. |
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8 * |
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9 * When using a child theme (see http://codex.wordpress.org/Theme_Development |
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10 * and http://codex.wordpress.org/Child_Themes), you can override certain |
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11 * functions (those wrapped in a function_exists() call) by defining them first |
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12 * in your child theme's functions.php file. The child theme's functions.php |
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13 * file is included before the parent theme's file, so the child theme |
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14 * functions would be used. |
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15 * |
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16 * Functions that are not pluggable (not wrapped in function_exists()) are |
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17 * instead attached to a filter or action hook. |
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18 * |
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19 * For more information on hooks, actions, and filters, @link http://codex.wordpress.org/Plugin_API |
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20 * |
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21 * @package WordPress |
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22 * @subpackage Twenty_Thirteen |
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23 * @since Twenty Thirteen 1.0 |
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24 */ |
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25 |
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26 /* |
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27 * Set up the content width value based on the theme's design. |
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28 * |
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29 * @see twentythirteen_content_width() for template-specific adjustments. |
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30 */ |
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31 if ( ! isset( $content_width ) ) |
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32 $content_width = 604; |
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33 |
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34 /** |
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35 * Add support for a custom header image. |
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36 */ |
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37 require get_template_directory() . '/inc/custom-header.php'; |
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38 |
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39 /** |
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40 * Twenty Thirteen only works in WordPress 3.6 or later. |
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41 */ |
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42 if ( version_compare( $GLOBALS['wp_version'], '3.6-alpha', '<' ) ) |
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43 require get_template_directory() . '/inc/back-compat.php'; |
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44 |
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45 /** |
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46 * Twenty Thirteen setup. |
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47 * |
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48 * Sets up theme defaults and registers the various WordPress features that |
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49 * Twenty Thirteen supports. |
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50 * |
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51 * @uses load_theme_textdomain() For translation/localization support. |
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52 * @uses add_editor_style() To add Visual Editor stylesheets. |
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53 * @uses add_theme_support() To add support for automatic feed links, post |
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54 * formats, and post thumbnails. |
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55 * @uses register_nav_menu() To add support for a navigation menu. |
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56 * @uses set_post_thumbnail_size() To set a custom post thumbnail size. |
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57 * |
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58 * @since Twenty Thirteen 1.0 |
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59 * |
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60 * @return void |
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61 */ |
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62 function twentythirteen_setup() { |
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63 /* |
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64 * Makes Twenty Thirteen available for translation. |
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65 * |
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66 * Translations can be added to the /languages/ directory. |
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67 * If you're building a theme based on Twenty Thirteen, use a find and |
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68 * replace to change 'twentythirteen' to the name of your theme in all |
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69 * template files. |
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70 */ |
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71 load_theme_textdomain( 'twentythirteen', get_template_directory() . '/languages' ); |
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72 |
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73 /* |
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74 * This theme styles the visual editor to resemble the theme style, |
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75 * specifically font, colors, icons, and column width. |
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76 */ |
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77 add_editor_style( array( 'css/editor-style.css', 'fonts/genericons.css', twentythirteen_fonts_url() ) ); |
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78 |
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79 // Adds RSS feed links to <head> for posts and comments. |
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80 add_theme_support( 'automatic-feed-links' ); |
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81 |
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82 /* |
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83 * Switches default core markup for search form, comment form, |
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84 * and comments to output valid HTML5. |
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85 */ |
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86 add_theme_support( 'html5', array( 'search-form', 'comment-form', 'comment-list' ) ); |
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87 |
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88 /* |
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89 * This theme supports all available post formats by default. |
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90 * See http://codex.wordpress.org/Post_Formats |
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91 */ |
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92 add_theme_support( 'post-formats', array( |
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93 'aside', 'audio', 'chat', 'gallery', 'image', 'link', 'quote', 'status', 'video' |
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94 ) ); |
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95 |
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96 // This theme uses wp_nav_menu() in one location. |
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97 register_nav_menu( 'primary', __( 'Navigation Menu', 'twentythirteen' ) ); |
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98 |
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99 /* |
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100 * This theme uses a custom image size for featured images, displayed on |
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101 * "standard" posts and pages. |
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102 */ |
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103 add_theme_support( 'post-thumbnails' ); |
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104 set_post_thumbnail_size( 604, 270, true ); |
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105 |
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106 // This theme uses its own gallery styles. |
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107 add_filter( 'use_default_gallery_style', '__return_false' ); |
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108 } |
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109 add_action( 'after_setup_theme', 'twentythirteen_setup' ); |
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110 |
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111 /** |
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112 * Return the Google font stylesheet URL, if available. |
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113 * |
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114 * The use of Source Sans Pro and Bitter by default is localized. For languages |
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115 * that use characters not supported by the font, the font can be disabled. |
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116 * |
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117 * @since Twenty Thirteen 1.0 |
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118 * |
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119 * @return string Font stylesheet or empty string if disabled. |
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120 */ |
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121 function twentythirteen_fonts_url() { |
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122 $fonts_url = ''; |
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123 |
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124 /* Translators: If there are characters in your language that are not |
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125 * supported by Source Sans Pro, translate this to 'off'. Do not translate |
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126 * into your own language. |
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127 */ |
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128 $source_sans_pro = _x( 'on', 'Source Sans Pro font: on or off', 'twentythirteen' ); |
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129 |
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130 /* Translators: If there are characters in your language that are not |
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131 * supported by Bitter, translate this to 'off'. Do not translate into your |
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132 * own language. |
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133 */ |
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134 $bitter = _x( 'on', 'Bitter font: on or off', 'twentythirteen' ); |
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135 |
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136 if ( 'off' !== $source_sans_pro || 'off' !== $bitter ) { |
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137 $font_families = array(); |
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138 |
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139 if ( 'off' !== $source_sans_pro ) |
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140 $font_families[] = 'Source Sans Pro:300,400,700,300italic,400italic,700italic'; |
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141 |
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142 if ( 'off' !== $bitter ) |
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143 $font_families[] = 'Bitter:400,700'; |
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144 |
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145 $query_args = array( |
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146 'family' => urlencode( implode( '|', $font_families ) ), |
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147 'subset' => urlencode( 'latin,latin-ext' ), |
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148 ); |
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149 $fonts_url = add_query_arg( $query_args, "//fonts.googleapis.com/css" ); |
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150 } |
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151 |
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152 return $fonts_url; |
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153 } |
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154 |
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155 /** |
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156 * Enqueue scripts and styles for the front end. |
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157 * |
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158 * @since Twenty Thirteen 1.0 |
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159 * |
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160 * @return void |
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161 */ |
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162 function twentythirteen_scripts_styles() { |
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163 /* |
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164 * Adds JavaScript to pages with the comment form to support |
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165 * sites with threaded comments (when in use). |
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166 */ |
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167 if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) |
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168 wp_enqueue_script( 'comment-reply' ); |
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169 |
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170 // Adds Masonry to handle vertical alignment of footer widgets. |
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171 if ( is_active_sidebar( 'sidebar-1' ) ) |
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172 wp_enqueue_script( 'jquery-masonry' ); |
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173 |
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174 // Loads JavaScript file with functionality specific to Twenty Thirteen. |
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175 wp_enqueue_script( 'twentythirteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '2013-07-18', true ); |
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176 |
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177 // Add Source Sans Pro and Bitter fonts, used in the main stylesheet. |
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178 wp_enqueue_style( 'twentythirteen-fonts', twentythirteen_fonts_url(), array(), null ); |
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179 |
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180 // Add Genericons font, used in the main stylesheet. |
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181 wp_enqueue_style( 'genericons', get_template_directory_uri() . '/fonts/genericons.css', array(), '2.09' ); |
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182 |
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183 // Loads our main stylesheet. |
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184 wp_enqueue_style( 'twentythirteen-style', get_stylesheet_uri(), array(), '2013-07-18' ); |
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185 |
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186 // Loads the Internet Explorer specific stylesheet. |
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187 wp_enqueue_style( 'twentythirteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentythirteen-style' ), '2013-07-18' ); |
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188 wp_style_add_data( 'twentythirteen-ie', 'conditional', 'lt IE 9' ); |
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189 } |
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190 add_action( 'wp_enqueue_scripts', 'twentythirteen_scripts_styles' ); |
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191 |
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192 /** |
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193 * Filter the page title. |
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194 * |
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195 * Creates a nicely formatted and more specific title element text for output |
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196 * in head of document, based on current view. |
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197 * |
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198 * @since Twenty Thirteen 1.0 |
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199 * |
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200 * @param string $title Default title text for current view. |
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201 * @param string $sep Optional separator. |
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202 * @return string The filtered title. |
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203 */ |
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204 function twentythirteen_wp_title( $title, $sep ) { |
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205 global $paged, $page; |
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206 |
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207 if ( is_feed() ) |
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208 return $title; |
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209 |
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210 // Add the site name. |
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211 $title .= get_bloginfo( 'name' ); |
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212 |
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213 // Add the site description for the home/front page. |
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214 $site_description = get_bloginfo( 'description', 'display' ); |
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215 if ( $site_description && ( is_home() || is_front_page() ) ) |
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216 $title = "$title $sep $site_description"; |
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217 |
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218 // Add a page number if necessary. |
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219 if ( $paged >= 2 || $page >= 2 ) |
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220 $title = "$title $sep " . sprintf( __( 'Page %s', 'twentythirteen' ), max( $paged, $page ) ); |
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221 |
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222 return $title; |
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223 } |
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224 add_filter( 'wp_title', 'twentythirteen_wp_title', 10, 2 ); |
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225 |
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226 /** |
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227 * Register two widget areas. |
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228 * |
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229 * @since Twenty Thirteen 1.0 |
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230 * |
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231 * @return void |
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232 */ |
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233 function twentythirteen_widgets_init() { |
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234 register_sidebar( array( |
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235 'name' => __( 'Main Widget Area', 'twentythirteen' ), |
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236 'id' => 'sidebar-1', |
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237 'description' => __( 'Appears in the footer section of the site.', 'twentythirteen' ), |
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238 'before_widget' => '<aside id="%1$s" class="widget %2$s">', |
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239 'after_widget' => '</aside>', |
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240 'before_title' => '<h3 class="widget-title">', |
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241 'after_title' => '</h3>', |
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242 ) ); |
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243 |
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244 register_sidebar( array( |
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245 'name' => __( 'Secondary Widget Area', 'twentythirteen' ), |
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246 'id' => 'sidebar-2', |
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247 'description' => __( 'Appears on posts and pages in the sidebar.', 'twentythirteen' ), |
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248 'before_widget' => '<aside id="%1$s" class="widget %2$s">', |
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249 'after_widget' => '</aside>', |
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250 'before_title' => '<h3 class="widget-title">', |
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251 'after_title' => '</h3>', |
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252 ) ); |
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253 } |
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254 add_action( 'widgets_init', 'twentythirteen_widgets_init' ); |
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255 |
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256 if ( ! function_exists( 'twentythirteen_paging_nav' ) ) : |
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257 /** |
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258 * Display navigation to next/previous set of posts when applicable. |
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259 * |
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260 * @since Twenty Thirteen 1.0 |
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261 * |
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262 * @return void |
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263 */ |
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264 function twentythirteen_paging_nav() { |
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265 global $wp_query; |
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266 |
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267 // Don't print empty markup if there's only one page. |
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268 if ( $wp_query->max_num_pages < 2 ) |
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269 return; |
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270 ?> |
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271 <nav class="navigation paging-navigation" role="navigation"> |
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272 <h1 class="screen-reader-text"><?php _e( 'Posts navigation', 'twentythirteen' ); ?></h1> |
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273 <div class="nav-links"> |
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274 |
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275 <?php if ( get_next_posts_link() ) : ?> |
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276 <div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">←</span> Older posts', 'twentythirteen' ) ); ?></div> |
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277 <?php endif; ?> |
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278 |
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279 <?php if ( get_previous_posts_link() ) : ?> |
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280 <div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">→</span>', 'twentythirteen' ) ); ?></div> |
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281 <?php endif; ?> |
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282 |
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283 </div><!-- .nav-links --> |
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284 </nav><!-- .navigation --> |
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285 <?php |
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286 } |
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287 endif; |
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288 |
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289 if ( ! function_exists( 'twentythirteen_post_nav' ) ) : |
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290 /** |
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291 * Display navigation to next/previous post when applicable. |
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292 * |
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293 * @since Twenty Thirteen 1.0 |
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294 * |
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295 * @return void |
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296 */ |
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297 function twentythirteen_post_nav() { |
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298 global $post; |
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299 |
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300 // Don't print empty markup if there's nowhere to navigate. |
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301 $previous = ( is_attachment() ) ? get_post( $post->post_parent ) : get_adjacent_post( false, '', true ); |
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302 $next = get_adjacent_post( false, '', false ); |
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303 |
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304 if ( ! $next && ! $previous ) |
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305 return; |
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306 ?> |
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307 <nav class="navigation post-navigation" role="navigation"> |
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308 <h1 class="screen-reader-text"><?php _e( 'Post navigation', 'twentythirteen' ); ?></h1> |
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309 <div class="nav-links"> |
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310 |
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311 <?php previous_post_link( '%link', _x( '<span class="meta-nav">←</span> %title', 'Previous post link', 'twentythirteen' ) ); ?> |
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312 <?php next_post_link( '%link', _x( '%title <span class="meta-nav">→</span>', 'Next post link', 'twentythirteen' ) ); ?> |
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313 |
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314 </div><!-- .nav-links --> |
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315 </nav><!-- .navigation --> |
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316 <?php |
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317 } |
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318 endif; |
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319 |
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320 if ( ! function_exists( 'twentythirteen_entry_meta' ) ) : |
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321 /** |
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322 * Print HTML with meta information for current post: categories, tags, permalink, author, and date. |
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323 * |
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324 * Create your own twentythirteen_entry_meta() to override in a child theme. |
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325 * |
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326 * @since Twenty Thirteen 1.0 |
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327 * |
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328 * @return void |
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329 */ |
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330 function twentythirteen_entry_meta() { |
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331 if ( is_sticky() && is_home() && ! is_paged() ) |
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332 echo '<span class="featured-post">' . __( 'Sticky', 'twentythirteen' ) . '</span>'; |
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333 |
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334 if ( ! has_post_format( 'link' ) && 'post' == get_post_type() ) |
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335 twentythirteen_entry_date(); |
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336 |
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337 // Translators: used between list items, there is a space after the comma. |
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338 $categories_list = get_the_category_list( __( ', ', 'twentythirteen' ) ); |
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339 if ( $categories_list ) { |
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340 echo '<span class="categories-links">' . $categories_list . '</span>'; |
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341 } |
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342 |
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343 // Translators: used between list items, there is a space after the comma. |
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344 $tag_list = get_the_tag_list( '', __( ', ', 'twentythirteen' ) ); |
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345 if ( $tag_list ) { |
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346 echo '<span class="tags-links">' . $tag_list . '</span>'; |
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347 } |
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348 |
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349 // Post author |
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350 if ( 'post' == get_post_type() ) { |
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351 printf( '<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s" rel="author">%3$s</a></span>', |
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352 esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ), |
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353 esc_attr( sprintf( __( 'View all posts by %s', 'twentythirteen' ), get_the_author() ) ), |
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354 get_the_author() |
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355 ); |
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356 } |
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357 } |
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358 endif; |
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359 |
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360 if ( ! function_exists( 'twentythirteen_entry_date' ) ) : |
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361 /** |
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362 * Print HTML with date information for current post. |
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363 * |
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364 * Create your own twentythirteen_entry_date() to override in a child theme. |
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365 * |
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366 * @since Twenty Thirteen 1.0 |
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367 * |
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368 * @param boolean $echo (optional) Whether to echo the date. Default true. |
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369 * @return string The HTML-formatted post date. |
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370 */ |
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371 function twentythirteen_entry_date( $echo = true ) { |
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372 if ( has_post_format( array( 'chat', 'status' ) ) ) |
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373 $format_prefix = _x( '%1$s on %2$s', '1: post format name. 2: date', 'twentythirteen' ); |
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374 else |
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375 $format_prefix = '%2$s'; |
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376 |
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377 $date = sprintf( '<span class="date"><a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s">%4$s</time></a></span>', |
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378 esc_url( get_permalink() ), |
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379 esc_attr( sprintf( __( 'Permalink to %s', 'twentythirteen' ), the_title_attribute( 'echo=0' ) ) ), |
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380 esc_attr( get_the_date( 'c' ) ), |
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381 esc_html( sprintf( $format_prefix, get_post_format_string( get_post_format() ), get_the_date() ) ) |
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382 ); |
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383 |
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384 if ( $echo ) |
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385 echo $date; |
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386 |
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387 return $date; |
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388 } |
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389 endif; |
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390 |
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391 if ( ! function_exists( 'twentythirteen_the_attached_image' ) ) : |
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392 /** |
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393 * Print the attached image with a link to the next attached image. |
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394 * |
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395 * @since Twenty Thirteen 1.0 |
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396 * |
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397 * @return void |
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398 */ |
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399 function twentythirteen_the_attached_image() { |
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400 /** |
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401 * Filter the image attachment size to use. |
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402 * |
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403 * @since Twenty thirteen 1.0 |
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404 * |
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405 * @param array $size { |
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406 * @type int The attachment height in pixels. |
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407 * @type int The attachment width in pixels. |
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408 * } |
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409 */ |
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410 $attachment_size = apply_filters( 'twentythirteen_attachment_size', array( 724, 724 ) ); |
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411 $next_attachment_url = wp_get_attachment_url(); |
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412 $post = get_post(); |
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413 |
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414 /* |
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415 * Grab the IDs of all the image attachments in a gallery so we can get the URL |
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416 * of the next adjacent image in a gallery, or the first image (if we're |
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417 * looking at the last image in a gallery), or, in a gallery of one, just the |
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418 * link to that image file. |
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419 */ |
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420 $attachment_ids = get_posts( array( |
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421 'post_parent' => $post->post_parent, |
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422 'fields' => 'ids', |
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423 'numberposts' => -1, |
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424 'post_status' => 'inherit', |
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425 'post_type' => 'attachment', |
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426 'post_mime_type' => 'image', |
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427 'order' => 'ASC', |
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428 'orderby' => 'menu_order ID' |
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429 ) ); |
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430 |
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431 // If there is more than 1 attachment in a gallery... |
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432 if ( count( $attachment_ids ) > 1 ) { |
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433 foreach ( $attachment_ids as $attachment_id ) { |
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434 if ( $attachment_id == $post->ID ) { |
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435 $next_id = current( $attachment_ids ); |
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436 break; |
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437 } |
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438 } |
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439 |
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440 // get the URL of the next image attachment... |
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441 if ( $next_id ) |
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442 $next_attachment_url = get_attachment_link( $next_id ); |
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443 |
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444 // or get the URL of the first image attachment. |
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445 else |
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446 $next_attachment_url = get_attachment_link( array_shift( $attachment_ids ) ); |
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447 } |
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448 |
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449 printf( '<a href="%1$s" title="%2$s" rel="attachment">%3$s</a>', |
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450 esc_url( $next_attachment_url ), |
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451 the_title_attribute( array( 'echo' => false ) ), |
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452 wp_get_attachment_image( $post->ID, $attachment_size ) |
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453 ); |
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454 } |
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455 endif; |
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456 |
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457 /** |
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458 * Return the post URL. |
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459 * |
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460 * @uses get_url_in_content() to get the URL in the post meta (if it exists) or |
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461 * the first link found in the post content. |
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462 * |
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463 * Falls back to the post permalink if no URL is found in the post. |
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464 * |
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465 * @since Twenty Thirteen 1.0 |
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466 * |
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467 * @return string The Link format URL. |
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468 */ |
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469 function twentythirteen_get_link_url() { |
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470 $content = get_the_content(); |
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471 $has_url = get_url_in_content( $content ); |
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472 |
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473 return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() ); |
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474 } |
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475 |
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476 /** |
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477 * Extend the default WordPress body classes. |
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478 * |
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479 * Adds body classes to denote: |
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480 * 1. Single or multiple authors. |
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481 * 2. Active widgets in the sidebar to change the layout and spacing. |
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482 * 3. When avatars are disabled in discussion settings. |
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483 * |
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484 * @since Twenty Thirteen 1.0 |
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485 * |
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486 * @param array $classes A list of existing body class values. |
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487 * @return array The filtered body class list. |
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488 */ |
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489 function twentythirteen_body_class( $classes ) { |
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490 if ( ! is_multi_author() ) |
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491 $classes[] = 'single-author'; |
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492 |
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493 if ( is_active_sidebar( 'sidebar-2' ) && ! is_attachment() && ! is_404() ) |
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494 $classes[] = 'sidebar'; |
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495 |
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496 if ( ! get_option( 'show_avatars' ) ) |
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497 $classes[] = 'no-avatars'; |
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498 |
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499 return $classes; |
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500 } |
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501 add_filter( 'body_class', 'twentythirteen_body_class' ); |
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502 |
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503 /** |
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504 * Adjust content_width value for video post formats and attachment templates. |
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505 * |
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506 * @since Twenty Thirteen 1.0 |
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507 * |
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508 * @return void |
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509 */ |
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510 function twentythirteen_content_width() { |
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511 global $content_width; |
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512 |
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513 if ( is_attachment() ) |
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514 $content_width = 724; |
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515 elseif ( has_post_format( 'audio' ) ) |
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516 $content_width = 484; |
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517 } |
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518 add_action( 'template_redirect', 'twentythirteen_content_width' ); |
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519 |
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520 /** |
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521 * Add postMessage support for site title and description for the Customizer. |
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522 * |
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523 * @since Twenty Thirteen 1.0 |
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524 * |
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525 * @param WP_Customize_Manager $wp_customize Customizer object. |
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526 * @return void |
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527 */ |
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528 function twentythirteen_customize_register( $wp_customize ) { |
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529 $wp_customize->get_setting( 'blogname' )->transport = 'postMessage'; |
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530 $wp_customize->get_setting( 'blogdescription' )->transport = 'postMessage'; |
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531 $wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage'; |
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532 } |
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533 add_action( 'customize_register', 'twentythirteen_customize_register' ); |
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534 |
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535 /** |
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536 * Enqueue Javascript postMessage handlers for the Customizer. |
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537 * |
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538 * Binds JavaScript handlers to make the Customizer preview |
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539 * reload changes asynchronously. |
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540 * |
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541 * @since Twenty Thirteen 1.0 |
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542 * |
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543 * @return void |
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544 */ |
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545 function twentythirteen_customize_preview_js() { |
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546 wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130226', true ); |
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547 } |
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548 add_action( 'customize_preview_init', 'twentythirteen_customize_preview_js' ); |