alx-extensions/alx-extensions.php

<?php
/*
Plugin Name: Alx Extensions
Plugin URI: http://wordpress.org/plugins/alx-extensions/
Description: Extends Alx themes with social share links, custom sidebars and post format meta boxes. Also includes the flexible widgets AlxTabs and AlxPosts.
Version: 1.1.5
Author: Alexander Agnarson
Author URI: http://alx.media
Text Domain: alx
Domain Path: /languages
License: GPLv3
License URI: http://www.gnu.org/licenses/gpl-3.0.html
*/

define( 'ALX_EXTENSIONS_SLUG', 'alx-extensions' );
define( 'ALX_EXTENSIONS_BASENAME', basename( dirname( __FILE__ ) ) );
define( 'ALX_EXTENSIONS_DIR', rtrim( plugin_dir_path( __FILE__ ), '/' ) );
define( 'ALX_EXTENSIONS_URL', rtrim( plugin_dir_url( __FILE__ ), '/' ) );

require_once ALX_EXTENSIONS_DIR . '/inc/options.php';
require_once ALX_EXTENSIONS_DIR . '/inc/share.php';
require_once ALX_EXTENSIONS_DIR . '/inc/share-footer.php';
require_once ALX_EXTENSIONS_DIR . '/inc/post-formats.php';


/*  Load plugin textdomain
/* ------------------------------------ */
function alx_ext_load_textdomain() {
	load_plugin_textdomain( 'alx', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
}

add_action( 'init', 'alx_ext_load_textdomain' );


/*  Enqueue scripts
/* ------------------------------------ */
function alx_ext_enqueue_scripts() {
	if ( is_singular() ) {
		// wp_enqueue_script( 'alx-ext-sharrre', ALX_EXTENSIONS_URL . '/js/jquery.sharrre.min.js', array( 'jquery' ), '1.0.1' );
	}
}

add_action( 'wp_enqueue_scripts', 'alx_ext_enqueue_scripts' );


/*  Enqueue admin scripts
/* ------------------------------------ */
function alx_ext_enqueue_admin_scripts( $hook ) {
	if ( in_array( $hook, array( 'post.php', 'post-new.php' ) ) ) {
		wp_enqueue_script( 'alx-ext-post-formats', ALX_EXTENSIONS_URL . '/js/post-formats.js', array( 'jquery' ), '1.0.1' );
	}
}

add_action( 'admin_enqueue_scripts', 'alx_ext_enqueue_admin_scripts' );


/*  Enqueue admin widgets css
/* ------------------------------------ */
function alx_ext_admin_widgets_css( $hook ) {
	if ( 'widgets.php' != $hook ) {
		return;
	}
	wp_enqueue_style( 'alx-ext-admin-widgets', ALX_EXTENSIONS_URL . '/inc/widgets/widgets.css' );
}

add_action( 'admin_enqueue_scripts', 'alx_ext_admin_widgets_css' );


/*  Upscale cropped thumbnails
/* ------------------------------------ */
function alx_ext_thumbnail_upscale( $default, $orig_w, $orig_h, $new_w, $new_h, $crop ) {
	if ( !$crop ) return null; // let the wordpress default function handle this

	$aspect_ratio = $orig_w / $orig_h;
	$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);

	$crop_w = round($new_w / $size_ratio);
	$crop_h = round($new_h / $size_ratio);

	$s_x = floor( ($orig_w - $crop_w) / 2 );
	$s_y = floor( ($orig_h - $crop_h) / 2 );

	return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
}

$enable_image_upscale = get_theme_mod( 'enable-image-upscale', true );
if ( true === $enable_image_upscale ) {
	add_filter( 'image_resize_dimensions', 'alx_ext_thumbnail_upscale', 10, 6 );
}


/*  Register custom sidebars
/* ------------------------------------ */
function alx_ext_register_custom_sidebars() {
	if ( !get_theme_mod('sidebar-areas') =='' ) {

		$sidebars = get_theme_mod('sidebar-areas', array());

		if ( !empty( $sidebars ) ) {
			foreach( $sidebars as $sidebar ) {
				if ( isset($sidebar['title']) && !empty($sidebar['title']) && isset($sidebar['id']) && !empty($sidebar['id']) && ($sidebar['id'] !='sidebar-') ) {
					register_sidebar(array('name' => ''.esc_attr( $sidebar['title'] ).'','id' => ''.esc_attr( strtolower($sidebar['id']) ).'','before_widget' => '<div id="%1$s" class="widget %2$s">','after_widget' => '</div>','before_title' => '<h3 class="group"><span>','after_title' => '</span></h3>'));
				}
			}
		}
	}
}

add_action( 'widgets_init', 'alx_ext_register_custom_sidebars', 11 );


/*  Custom widgets
/* ------------------------------------ */
if ( get_theme_mod( 'widget-alx-posts', 'on' ) == 'on') {
	require_once ALX_EXTENSIONS_DIR . '/inc/widgets/alx-posts.php';
}
if ( get_theme_mod( 'widget-alx-tabs', 'on' ) == 'on') {
	require_once ALX_EXTENSIONS_DIR . '/inc/widgets/alx-tabs.php';
}