functions.php

<?php
/**
 * pw functions and definitions.
 *
 * Sets up the theme and provides some helper functions, which are used
 * in the theme as custom template tags. Others are attached to action and
 * filter hooks in WordPress to change core functionality.
 *
 * When using a child theme (see http://codex.wordpress.org/Theme_Development and
 * http://codex.wordpress.org/Child_Themes), you can override certain functions
 * (those wrapped in a function_exists() call) by defining them first in your child theme's
 * functions.php file. The child theme's functions.php file is included before the parent
 * theme's file, so the child theme functions would be used.
 *
 * Functions that are not pluggable (not wrapped in function_exists()) are instead attached
 * to a filter or action hook.
 *
 * For more information on hooks, actions, and filters, see http://codex.wordpress.org/Plugin_API.
 *
 * @package WordPress
 * @subpackage pw
 * @since pw 1.0
 */

if ( function_exists('register_sidebar') ) register_sidebar(array(
  'name' => __( 'Header Sidebar', 'pw' ),
  'id' => 'header-sidebar',
  'description' => __( 'Widgets in this area will be shown on the header.', 'pw' )
));
if ( ! isset( $content_width ) ) $content_width = 1100;
    add_theme_support( 'automatic-feed-links' );
    add_theme_support( 'post-thumbnails' );
    add_editor_style();
    add_theme_support( 'custom-background', array(
    'default-color' => 'e6e6e6',
) );
if ( is_singular() && comments_open() && get_option( 'thread_comments' ) )
    wp_enqueue_script( 'comment-reply' );

require( get_template_directory() . '/inc/custom-header.php' );

/**
 * Customized the_excerpt()
 */
function new_excerpt_more( $more ) {
    return ' ...';
}
add_filter('excerpt_more', 'new_excerpt_more');

function custom_excerpt_length($length) {
    return 30;
}
add_filter('excerpt_length', 'custom_excerpt_length');

/**
 * Function to manipulate dates
 */
function pw_date() {
    global $post;
    return '<time datetime="'.get_the_time('Y-m-d').'" class="updated">'.get_the_time('d').' de <span>'.get_the_time('F').' de '.get_the_time('Y').'</span></time>'.PHP_EOL;
}
/**
 * overwrite comments_popup_link
 */
function add_nofollow_to_comments_popup_link() {
    return ' rel="nofollow" ';
}
add_filter( 'comments_popup_link_attributes', 'add_nofollow_to_comments_popup_link' );

/**
 * overwrite wp_list_categories
 */
function new_wp_list_categories($more) {
    $args=array(
        'orderby' => 'name',
        'order' => 'ASC'
    );
    $categories=get_categories($args);
    $li = '';
    foreach($categories as $category)
    {
        $li.= '<li><a href="'.get_category_link( $category->term_id ).'" title="'.$category->name.' '.$category->description.'">'.$category->name.'</a></li> ';
    }
    return $li;
}
add_filter('wp_list_categories', 'new_wp_list_categories');

function replace_cat_tag ( $text ) {
    $text = str_replace(array('rel="category"','rel="category tag"'), "", $text); return $text;
}
add_filter( 'the_category', 'replace_cat_tag' );

/**
 * overwrite wp_list_categories
 */
add_filter('next_posts_link_attributes', 'get_next_posts_link_attributes');
add_filter('previous_posts_link_attributes', 'get_previous_posts_link_attributes');

if (!function_exists('get_next_posts_link_attributes')){
    function get_next_posts_link_attributes($attr){
        $attr = 'rel="next" title="Posts mais antigos"';
        return $attr;
    }
}
if (!function_exists('get_previous_posts_link_attributes')){
    function get_previous_posts_link_attributes($attr){
        $attr = 'rel="prev" title="Posts mais recentes"';
        return $attr;
    }
}

if ( function_exists( 'add_image_size' ) ) {
    add_image_size( 'featured-thumb', 460, 190, true );
    add_image_size( 'list-thumb', 300, 125, true );
}


/**
 * Add a rel="nofollow" to the comment reply links
 */
function add_nofollow_to_reply_link( $link ) {
        return str_replace( '")\'>', '")\' rel=\'nofollow\'>', $link );
}
add_filter( 'comment_reply_link', 'add_nofollow_to_reply_link' );

if ( ! function_exists( 'parent_comment' ) ) :
/**
 * Template for comments and pingbacks.
 *
 * To override this walker in a child theme without modifying the comments template
 * simply create your own twentyten_comment(), and that function will be used instead.
 *
 * Used as a callback by wp_list_comments() for displaying the comments.
 *
 * @since pw 0.0.1
 */
function parent_comment( $comment, $args, $depth ) {
    $GLOBALS['comment'] = $comment;
    switch ( $comment->comment_type ) :
        case '' :
    ?>
        <li <?php comment_class(); ?> id="comment-<?php comment_ID() ?>"> <?php echo get_avatar( $comment, 32 ); ?>

            <cite><?php comment_text() ?></cite>

            <?php _e('por', 'pw'); ?>
            <?php comment_author_link() ?>
            &#8212;

            <time datetime="<?php echo $comment->comment_date; ?>">
                <?php comment_date() ?>
                @ <a href="#comment-<?php comment_ID() ?>">
                <?php comment_time() ?>
                </a>
            </time>
            <?php edit_comment_link(__('Editar', 'pw'), ' | '); ?>

            <?php if ( $comment->comment_approved == '0' ) : ?>
                <em class="comment-awaiting-moderation"><?php _e( 'Seu coment&aacute;rio est&aacute; aguardando revis&atilde;o', 'pw' ); ?></em>
            <?php endif; ?>

            <?php comment_reply_link( array_merge( $args, array( 'depth' => $depth, 'max_depth' => $args['max_depth'] ) ) ); ?>
        </li>

    <?php
            break;
        case 'pingback'  :
        case 'trackback' :
    ?>
    <li class="post pingback">
        <p><?php _e( 'Pingback:', 'pw' ); ?> <?php comment_author_link(); ?><?php edit_comment_link( __( '(Editar)', 'pw' ), ' ' ); ?></p>
    <?php
            break;
    endswitch;
}
endif;

function catch_that_image() {
    global $post, $posts;
    $first_img = '';
    ob_start();
    ob_end_clean();
    $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
    $first_img = $matches [1] [0];
    if(empty($first_img)){
        //Defines a default image
        $first_img = get_template_directory_uri()."/images/img-post-default.png";
    }
    return $first_img;
}

function get_excerpt_by_id($post_id){
    $the_post = get_post($post_id); //Gets post ID
    $the_excerpt = $the_post->post_content; //Gets post_content to be used as a basis for the excerpt
    $excerpt_length = 20; //Sets excerpt length by word count
    $the_excerpt = strip_tags(strip_shortcodes($the_excerpt)); //Strips tags and images
    $words = explode(' ', $the_excerpt, $excerpt_length + 1);

    if(count($words) > $excerpt_length) :
        array_pop($words);
        array_push($words, '…');
        $the_excerpt = implode(' ', $words);
    endif;

    return $the_excerpt;
}

/**
 * Shortcodes.
 *
 * @since pw 0.0.1
 */
function sourcecode ($atts, $content = null) {
  extract( shortcode_atts( array(
      'language' => ''
  ), $atts ));

  $content = str_replace(Array('&#8220;', '&#8221;'), '"', $content);

  return '<pre class="'.$language.'">'.$content.'</pre>';
}
add_shortcode('sourcecode', 'sourcecode');
add_shortcode('source', 'sourcecode');

/**
 * Don't auto-p wrap shortcodes that stand alone
 *
 * Ensures that shortcodes are not wrapped in <<p>>...<</p>>.
 *
 * @since 2.9.0
 *
 * @param string $pee The content.
 * @return string The filtered content.
 */
function shortcode_unauto( $pee ) {
    global $shortcode_tags;

    if ( empty( $shortcode_tags ) || !is_array( $shortcode_tags ) ) {
        return $pee;
    }

    $tagregexp = join( '|', array_map( 'preg_quote', array_keys( $shortcode_tags ) ) );

    $pattern =
          '/'
        . '<p>'                              // Opening paragraph
        . '\\s*+'                            // Optional leading whitespace
        . '('                                // 1: The shortcode
        .     '\\['                          // Opening bracket
        .     "($tagregexp)"                 // 2: Shortcode name
        .     '(?![\\w-])'                   // Not followed by word character or hyphen
                                             // Unroll the loop: Inside the opening shortcode tag
        .     '[^\\]\\/]*'                   // Not a closing bracket or forward slash
        .     '(?:'
        .         '\\/(?!\\])'               // A forward slash not followed by a closing bracket
        .         '[^\\]\\/]*'               // Not a closing bracket or forward slash
        .     ')*?'
        .     '(?:'
        .         '\\/\\]'                   // Self closing tag and closing bracket
        .     '|'
        .         '\\]'                      // Closing bracket
        .         '(?:'                      // Unroll the loop: Optionally, anything between the opening and closing shortcode tags
        .             '[^\\[]*+'             // Not an opening bracket
        .             '(?:'
        .                 '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag
        .                 '[^\\[]*+'         // Not an opening bracket
        .             ')*+'
        .             '\\[\\/\\2\\]'         // Closing shortcode tag
        .         ')?'
        .     ')'
        . ')'
        . '\\s*+'                            // optional trailing whitespace
        . '<\\/p>'                           // closing paragraph
        . '/s';

    return preg_replace( $pattern, '$1', $pee );
}
remove_filter( 'the_content', 'wpautop' );
add_filter( 'the_content', 'wpautop' , 99);
add_filter( 'the_content', 'shortcode_unauto',100 );
?>