317 lines
9.5 KiB
PHP
317 lines
9.5 KiB
PHP
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<?php
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/*
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Plugin Name: Infinite Scroll
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Description: Automatically loads the next page of posts into the bottom of the initial page.
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Version: 2.6.2
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Author: Beaver6813, dirkhaim, Paul Irish, benbalter, Glenn Nelson
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Author URI:
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License: GPL3
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License URI: http://www.gnu.org/licenses/gpl-3.0.html
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Text Domain: infinite-scroll
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Domain Path: /languages/
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*/
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/* Copyright 2008-2012 Beaver6813, dirkhaim, Paul Irish, Benjamin J. Balter, Glenn Nelson
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @copyright 2008-2012
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* @license GPL v3
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* @version 2.6.2
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* @package Infinite Scroll
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* @author Beaver6813, dirkhaim, Paul Irish, Benjamin J. Balter, Glenn Nelson
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*/
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require_once dirname( __FILE__ ) . '/includes/options.php';
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require_once dirname( __FILE__ ) . '/includes/admin.php';
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require_once dirname( __FILE__ ) . '/includes/presets.php';
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require_once dirname( __FILE__ ) . '/includes/submit.php';
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class Infinite_Scroll {
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static $instance;
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public $options;
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public $admin;
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public $submit;
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public $name = 'Infinite Scroll'; //Human-readable name of plugin
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public $slug = 'infinite-scroll'; //plugin slug, generally base filename and in url on wordpress.org
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public $slug_ = 'infinite_scroll'; //slug with underscores (PHP/JS safe)
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public $prefix = 'infinite_scroll_'; //prefix to append to all options, API calls, etc. w/ trailing underscore
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public $file = null;
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public $version = '2.6.1';
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public $behaviors = array( //array of behaviors as key => array( label => js file ) (without extension)
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'twitter' => array( 'label' => 'Manual Trigger', 'src' => 'manual-trigger' ),
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'local' => array( 'label' => 'Local', 'src' => 'local' ),
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'cufon' => array( 'label' => 'Cufon', 'src' => 'cufon' ),
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'masonry' => array( 'label' => 'Masonry/Isotope', 'src' => 'masonry-isotope')
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);
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/**
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* Construct the primary class and auto-load all child classes
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*/
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function __construct() {
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self::$instance = &$this;
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$this->file = __FILE__;
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$this->admin = new Infinite_Scroll_Admin( $this );
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$this->options = new Infinite_Scroll_Options( $this );
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$this->presets = new Infinite_Scroll_Presets( $this );
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$this->submit = new Infinite_Scroll_Submit( $this );
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//upgrade db
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add_action( 'admin_init', array( &$this, 'upgrade_check' ) );
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//i18n
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add_action( 'init', array( &$this, 'i18n' ) );
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//default options
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add_action( 'init', array( &$this, 'init_defaults' ) );
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//js
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add_action( 'wp_enqueue_scripts', array( &$this, 'enqueue_js' ) );
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add_action( 'wp_footer', array( &$this, 'footer' ), 100 ); //low priority will load after i18n and script loads
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//preset cron
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register_activation_hook( __FILE__, array( &$this->presets, 'schedule' ) );
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register_deactivation_hook( __FILE__, array( &$this->presets, 'unschedule' ) );
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//404 fix
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add_action( 'wp', array( &$this, 'paged_404_fix' ) );
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}
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/**
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* Init default options
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*/
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function init_defaults() {
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//option keys map to javascript options and are passed directly via wp_localize_script
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$this->options->defaults = array(
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'loading' => array(
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'msgText' => '<em>' . __( 'Loading...', 'infinite-scroll' ) . '</em>',
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'finishedMsg' => '<em>' . __( 'No additional posts.', 'infinite-scroll' ) . '</em>',
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'img' => plugins_url( 'img/ajax-loader.gif', __FILE__ )
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),
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'nextSelector' => '#nav-below a:first',
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'navSelector' => '#nav-below',
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'itemSelector' => '.post',
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'contentSelector' => '#content',
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'debug' => WP_DEBUG,
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'behavior' => ''
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);
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}
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/**
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* Enqueue front-end JS and pass options to json_encoded array
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*/
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function enqueue_js() {
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if (!$this->shouldLoadJavascript()) {
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return;
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}
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$suffix = ( WP_DEBUG ) ? '.dev' : '';
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$file = "/js/front-end/jquery.infinitescroll{$suffix}.js";
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wp_enqueue_script( $this->slug, plugins_url( $file, __FILE__ ), array( 'jquery' ), $this->version, true );
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$options = apply_filters( $this->prefix . 'js_options', $this->options->get_options() );
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wp_localize_script($this->slug, $this->slug_, json_encode($options));
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// If no behavior, we're done, kick
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if ( !$options['behavior'] )
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return;
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//sanity check
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if ( !array_key_exists( $options['behavior'], $this->behaviors ) )
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return _doing_it_wrong( 'Infinite Scroll behavior', "Behavior {$options['behavior']} not found", $this->version );
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$src = 'behaviors/' . $this->behaviors[ $options['behavior'] ]['src'] . '.js';
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wp_enqueue_script( $this->slug . "-behavior", plugins_url( $src, __FILE__ ), array( "jquery", $this->slug ), $this->version, true );
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}
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/**
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* Load footer template to pass options array to JS
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*/
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function footer() {
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if (!$this->shouldLoadJavascript()) {
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return;
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}
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require dirname( __FILE__ ) . '/templates/footer.php';
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}
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/**
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* Init i18n files
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*/
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function i18n() {
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load_plugin_textdomain( $this->slug, false, plugin_basename( dirname( __FILE__ ) ) . '/languages/' );
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}
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/**
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* Upgrades DB
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* Fires on admin init to support SVN
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*/
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function upgrade_check() {
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if ($this->options->db_version == $this->version) {
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return;
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}
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$this->upgrade( $this->options->db_version, $this->version );
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do_action( $this->prefix . 'upgrade', $this->version, $this->options->db_version );
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$this->options->db_version = $this->version;
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}
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/**
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* Upgrade DB to latest version
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* @param int $from version coming from
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* @param int $to version going to
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*/
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function upgrade( $from , $to ) {
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if ($from < "2.5") {
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//array of option conversions in the form of from => to
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$map = array(
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'js_calls' => 'callback',
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'image' => 'img',
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'text' => 'msgText',
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'donetext' => 'finishedMsg',
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'content_selector' => 'contentSelector',
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'post_selector' => 'itemSelector',
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'nav_selector' => 'navSelector',
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'next_selector' => 'nextSelector',
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'behavior' => 'behavior',
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'debug' => 'debug',
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);
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$old = get_option( 'infscr_options' );
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$new = array();
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//really old legacy options storage
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//each option is stored as its own option in the options table
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if ( !$old ) {
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//loop through options and attempt to find
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foreach ( array_keys( $map ) as $option ) {
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$legacy = get_option( 'infscr_' . $option );
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if ( !$legacy )
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continue;
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//move to new option array and delete old
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$new[ $map[ $option ] ] = $legacy;
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delete_option( 'infscr_' . $option );
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}
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}
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//pre 2.5 options storage
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//all stuffed in a single array, but not properly keyed
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foreach ( $map as $from => $to ) {
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if ( !$old || !isset( $old[ 'infscr_' . $from ] ) )
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continue;
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$new[ $to ] = $old[ 'infscr_' . $from ];
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}
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//pre 2.5 we html encoded selectors, we don't do this anymore
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foreach ( array( 'contentSelector', 'itemSelector', 'navSelector', 'nextSelector' ) as $field ) {
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if ( isset( $new[$field] ) ) {
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$new[$field] = html_entity_decode($new[$field]);
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}
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}
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//regardless of which upgrade we did, move loading string to array
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$new['loading'] = array( );
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foreach ( array( 'finishedMsg', 'msgText', "img" ) as $field ) {
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if ( isset( $new[$field] ) ) {
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$new['loading'][$field] = $new[$field];
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unset( $new[$field] );
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}
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}
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//if the user is still using the default ajax-loader.gif then update the location
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if( isset($new["loading"]['img']) && !strstr($new["loading"]["img"], "/img/ajax-loader.gif") )
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$new["loading"]['img'] = str_replace("/ajax-loader.gif",
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"/img/ajax-loader.gif",
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$new["loading"]['img']);
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//regardless of which upgrade, ensure that debug is now set to boolean string rather than int
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//if it wasn't originally on then just set it to the plugin default
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if( isset($new['debug']) && $new['debug'] == 1 )
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$new['debug'] = "true";
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else
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unset( $new['debug'] );
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//don't pass an empty array so the default filter can properly set defaults
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if ( empty( $new['loading'] ) )
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unset( $new['loading'] );
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$this->options->set_options( $new );
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delete_option( 'infscr_options' );
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$this->presets->migrate();
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}
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//migrate loading image
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if ($from < '2.6') {
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$old = get_option("infinite_scroll");
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$new = $old;
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$new["loading"]["img"] = $old["img"];
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unset($new["img"]);
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$this->options->set_options($new);
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}
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}
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/**
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* If we go beyond the last page and request a page that doesn't exist,
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* force WordPress to return a 404.
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* See http://core.trac.wordpress.org/ticket/15770
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*/
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function paged_404_fix( ) {
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global $wp_query;
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if ( is_404() || !is_paged() || 0 != count( $wp_query->posts ) )
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return;
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$wp_query->set_404();
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status_header( 404 );
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nocache_headers();
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}
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/**
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* Determines if the jQuery plugin and corresponding options should
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* be output onto the page.
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*
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* @return bool
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*/
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function shouldLoadJavascript() {
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// Don't need to load the plugin on single pages
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if (is_singular()) {
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return false;
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}
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return true;
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}
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}
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$infinite_scroll = new Infinite_Scroll();
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