javascripts/infinite-scroll/wordpress-plugin/infinite-scroll.php
<?php
/*
Plugin Name: Infinite Scroll
Description: Automatically loads the next page of posts into the bottom of the initial page.
Version: 2.6.1
Author: Beaver6813, dirkhaim, Paul Irish, benbalter, Glenn Nelson
Author URI:
License: GPL3
License URI: http://www.gnu.org/licenses/gpl-3.0.html
Text Domain: infinite-scroll
Domain Path: /languages/
*/
/* Copyright 2008-2012 Beaver6813, dirkhaim, Paul Irish, Benjamin J. Balter, Glenn Nelson
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @copyright 2008-2012
* @license GPL v3
* @version 2.6.1
* @package Infinite Scroll
* @author Beaver6813, dirkhaim, Paul Irish, Benjamin J. Balter, Glenn Nelson
*/
require_once dirname( __FILE__ ) . '/includes/options.php';
require_once dirname( __FILE__ ) . '/includes/admin.php';
require_once dirname( __FILE__ ) . '/includes/presets.php';
require_once dirname( __FILE__ ) . '/includes/submit.php';
class Infinite_Scroll {
static $instance;
public $options;
public $admin;
public $submit;
public $name = 'Infinite Scroll'; //Human-readable name of plugin
public $slug = 'infinite-scroll'; //plugin slug, generally base filename and in url on wordpress.org
public $slug_ = 'infinite_scroll'; //slug with underscores (PHP/JS safe)
public $prefix = 'infinite_scroll_'; //prefix to append to all options, API calls, etc. w/ trailing underscore
public $file = null;
public $version = '2.6.1';
public $behaviors = array( //array of behaviors as key => array( label => js file ) (without extension)
'twitter' => array( 'label' => 'Manual Trigger', 'src' => 'manual-trigger' ),
'local' => array( 'label' => 'Local', 'src' => 'local' ),
'cufon' => array( 'label' => 'Cufon', 'src' => 'cufon' ),
'masonry' => array( 'label' => 'Masonry/Isotope', 'src' => 'masonry-isotope')
);
/**
* Construct the primary class and auto-load all child classes
*/
function __construct() {
self::$instance = &$this;
$this->file = __FILE__;
$this->admin = new Infinite_Scroll_Admin( $this );
$this->options = new Infinite_Scroll_Options( $this );
$this->presets = new Infinite_Scroll_Presets( $this );
$this->submit = new Infinite_Scroll_Submit( $this );
//upgrade db
add_action( 'admin_init', array( &$this, 'upgrade_check' ) );
//i18n
add_action( 'init', array( &$this, 'i18n' ) );
//default options
add_action( 'init', array( &$this, 'init_defaults' ) );
//js
add_action( 'wp_enqueue_scripts', array( &$this, 'enqueue_js' ) );
add_action( 'wp_footer', array( &$this, 'footer' ), 100 ); //low priority will load after i18n and script loads
//preset cron
register_activation_hook( __FILE__, array( &$this->presets, 'schedule' ) );
register_deactivation_hook( __FILE__, array( &$this->presets, 'unschedule' ) );
//404 fix
add_action( 'wp', array( &$this, 'paged_404_fix' ) );
}
/**
* Init default options
*/
function init_defaults() {
//option keys map to javascript options and are passed directly via wp_localize_script
$this->options->defaults = array(
'loading' => array(
'msgText' => '<em>' . __( 'Loading...', 'infinite-scroll' ) . '</em>',
'finishedMsg' => '<em>' . __( 'No additional posts.', 'infinite-scroll' ) . '</em>',
'img' => plugins_url( 'img/ajax-loader.gif', __FILE__ )
),
'nextSelector' => '#nav-below a:first',
'navSelector' => '#nav-below',
'itemSelector' => '.post',
'contentSelector' => '#content',
'debug' => WP_DEBUG,
'behavior' => ''
);
}
/**
* Enqueue front-end JS and pass options to json_encoded array
*/
function enqueue_js() {
if (!$this->shouldLoadJavascript()) {
return;
}
$suffix = ( WP_DEBUG ) ? '.dev' : '';
$file = "/js/front-end/jquery.infinitescroll{$suffix}.js";
wp_enqueue_script( $this->slug, plugins_url( $file, __FILE__ ), array( 'jquery' ), $this->version, true );
$options = apply_filters( $this->prefix . 'js_options', $this->options->get_options() );
wp_localize_script($this->slug, $this->slug_, json_encode($options));
// If no behavior, we're done, kick
if ( !$options['behavior'] )
return;
//sanity check
if ( !array_key_exists( $options['behavior'], $this->behaviors ) )
return _doing_it_wrong( 'Infinite Scroll behavior', "Behavior {$options['behavior']} not found", $this->version );
$src = 'behaviors/' . $this->behaviors[ $options['behavior'] ]['src'] . '.js';
wp_enqueue_script( $this->slug . "-behavior", plugins_url( $src, __FILE__ ), array( "jquery", $this->slug ), $this->version, true );
}
/**
* Load footer template to pass options array to JS
*/
function footer() {
if (!$this->shouldLoadJavascript()) {
return;
}
require dirname( __FILE__ ) . '/templates/footer.php';
}
/**
* Init i18n files
*/
function i18n() {
load_plugin_textdomain( $this->slug, false, plugin_basename( dirname( __FILE__ ) ) . '/languages/' );
}
/**
* Upgrades DB
* Fires on admin init to support SVN
*/
function upgrade_check() {
if ($this->options->db_version == $this->version) {
return;
}
$this->upgrade( $this->options->db_version, $this->version );
do_action( $this->prefix . 'upgrade', $this->version, $this->options->db_version );
$this->options->db_version = $this->version;
}
/**
* Upgrade DB to latest version
* @param int $from version coming from
* @param int $to version going to
*/
function upgrade( $from , $to ) {
if ($from < "2.5") {
//array of option conversions in the form of from => to
$map = array(
'js_calls' => 'callback',
'image' => 'img',
'text' => 'msgText',
'donetext' => 'finishedMsg',
'content_selector' => 'contentSelector',
'post_selector' => 'itemSelector',
'nav_selector' => 'navSelector',
'next_selector' => 'nextSelector',
'behavior' => 'behavior',
'debug' => 'debug',
);
$old = get_option( 'infscr_options' );
$new = array();
//really old legacy options storage
//each option is stored as its own option in the options table
if ( !$old ) {
//loop through options and attempt to find
foreach ( array_keys( $map ) as $option ) {
$legacy = get_option( 'infscr_' . $option );
if ( !$legacy )
continue;
//move to new option array and delete old
$new[ $map[ $option ] ] = $legacy;
delete_option( 'infscr_' . $option );
}
}
//pre 2.5 options storage
//all stuffed in a single array, but not properly keyed
foreach ( $map as $from => $to ) {
if ( !$old || !isset( $old[ 'infscr_' . $from ] ) )
continue;
$new[ $to ] = $old[ 'infscr_' . $from ];
}
//pre 2.5 we html encoded selectors, we don't do this anymore
foreach ( array( 'contentSelector', 'itemSelector', 'navSelector', 'nextSelector' ) as $field ) {
if ( isset( $new[$field] ) ) {
$new[$field] = html_entity_decode($new[$field]);
}
}
//regardless of which upgrade we did, move loading string to array
$new['loading'] = array( );
foreach ( array( 'finishedMsg', 'msgText', "img" ) as $field ) {
if ( isset( $new[$field] ) ) {
$new['loading'][$field] = $new[$field];
unset( $new[$field] );
}
}
//if the user is still using the default ajax-loader.gif then update the location
if( isset($new["loading"]['img']) && !strstr($new["loading"]["img"], "/img/ajax-loader.gif") )
$new["loading"]['img'] = str_replace("/ajax-loader.gif",
"/img/ajax-loader.gif",
$new["loading"]['img']);
//regardless of which upgrade, ensure that debug is now set to boolean string rather than int
//if it wasn't originally on then just set it to the plugin default
if( isset($new['debug']) && $new['debug'] == 1 )
$new['debug'] = "true";
else
unset( $new['debug'] );
//don't pass an empty array so the default filter can properly set defaults
if ( empty( $new['loading'] ) )
unset( $new['loading'] );
$this->options->set_options( $new );
delete_option( 'infscr_options' );
$this->presets->migrate();
}
//migrate loading image
if ($from < '2.6') {
$old = get_option("infinite_scroll");
$new = $old;
$new["loading"]["img"] = $old["img"];
unset($new["img"]);
$this->options->set_options($new);
}
}
/**
* If we go beyond the last page and request a page that doesn't exist,
* force WordPress to return a 404.
* See http://core.trac.wordpress.org/ticket/15770
*/
function paged_404_fix( ) {
global $wp_query;
if ( is_404() || !is_paged() || 0 != count( $wp_query->posts ) )
return;
$wp_query->set_404();
status_header( 404 );
nocache_headers();
}
/**
* Determines if the jQuery plugin and corresponding options should
* be output onto the page.
*
* @return bool
*/
function shouldLoadJavascript() {
// Don't need to load the plugin on single pages
$load = is_single() ? false : true;
return apply_filters( 'infinite_scroll_load_javascript', $load );
}
}
$infinite_scroll = new Infinite_Scroll();