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<?php |
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/* |
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Plugin Name: Presentations |
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Plugin URI: http://automattic.com/wordpress-plugins/ |
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Description: Presentations plugin based on the work done by <a href="http://darylkoop.com/">Daryl Koopersmith</a>. Powered by jmpress.js |
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Version: 0.2 |
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Author: Automattic |
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Author URI: http://automattic.com/wordpress-plugins/ |
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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 2 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, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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|
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/** |
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* Known issues: |
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* |
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* - IE 7/8 are not supported by jmpress and presentations will not work |
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* - IE 9 will not animate transitions at all, though it's possible to at least |
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* switch between slides. |
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* - Infinite Scroll themes will not load presentations properly unless the post |
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* happens to be on the first loaded page. The permalink page will function |
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* properly, however. |
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* - Exiting fullscreen mode will not properly reset the scroll locations in Safari |
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*/ |
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|
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|
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/* |
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HOW TO: How the plugin settings are organized and which features are supported. |
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|
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The entire presentation should be wrapped with a [presentation] shortcode, and every |
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individual slide should be wrapped with a [slide] shortcode. Any settings supported |
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by [slide] can be set into [presentation], which will apply that setting for the entire |
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presentation unless overridden by individual slides. |
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|
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- [presentation] only settings: |
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- duration: transition durations, default is one second. |
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- height: content height, default is 400px |
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- width: content width, default is 550px |
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|
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- [slide] settings: |
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- transition: specifies where the next slide will be placed relative |
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to the last one before it. Supported values are "up", "down" |
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"left", "right", or "none". Default value is "down". |
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|
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- scale: scales the content relative to other slides, default value is one |
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|
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- rotate: rotates the content by the specified degrees, default is zero |
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|
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- fade: slides will fade in and out during transition. Values of "on" or |
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"true" will enable fading, while values of "no" or "false" will |
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disable it. Default value is "on" |
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|
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- bgcolor: specifies a background color for the slides. Any CSS valid value |
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is permitted. Default color is transparent. |
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|
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- bgimg: specifies an image url which will fill the background. Image is |
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set to fill the background 100% width and height |
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*/ |
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|
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if ( ! class_exists( 'Presentations' ) ) : |
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|
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class Presentations { |
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|
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private $presentation_settings; |
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private $presentation_initialized; |
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private $scripts_and_style_included; |
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|
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/** |
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* Constructor |
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*/ |
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function __construct() { |
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// Bail without 3.0. |
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if ( ! function_exists( '__return_false' ) ) |
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return; |
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|
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$this->presentation_initialized = false; |
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$this->scripts_and_style_included = false; |
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|
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// Registers shortcodes |
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add_action( 'wp_head', array( &$this, 'add_scripts' ), 1 ); |
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|
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add_shortcode( 'presentation', array( &$this, 'presentation_shortcode' ) ); |
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add_shortcode( 'slide', array( &$this, 'slide_shortcode' ) ); |
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} |
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|
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function add_scripts() { |
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$this->scripts_and_style_included = false; |
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|
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if ( empty( $GLOBALS['posts'] ) || !is_array( $GLOBALS['posts'] ) ) { |
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return; |
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} |
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|
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foreach ( $GLOBALS['posts'] as $p ) { |
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if ( false !== strpos( $p->post_content, '[presentation' ) ) { |
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$this->scripts_and_style_included = true; |
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break; |
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} |
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} |
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|
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if ( ! $this->scripts_and_style_included ) |
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return; |
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|
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$plugin = plugin_dir_url( __FILE__ ); |
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// Add CSS |
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wp_enqueue_style('presentations', $plugin . 'css/style.css'); |
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// Add JavaScript |
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wp_enqueue_script('jquery'); |
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wp_enqueue_script('jmpress', |
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$plugin . 'js/jmpress.min.js', |
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array('jquery'), |
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'0.4.5', |
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true); |
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wp_enqueue_script('presentations', |
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$plugin . 'js/main.js', |
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array('jquery', 'jmpress'), |
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false, |
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true); |
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} |
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|
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function presentation_shortcode( $atts, $content='' ) { |
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// Mark that we've found a valid [presentation] shortcode |
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$this->presentation_initialized = true; |
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|
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$atts = shortcode_atts( array( |
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'duration' => '', |
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'height' => '', |
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'width' => '', |
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'bgcolor' => '', |
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'bgimg' => '', |
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|
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// Settings |
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'transition' => '', |
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'scale' => '', |
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'rotate' => '', |
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'fade' => '', |
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), $atts ); |
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|
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$this->presentation_settings = array( |
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'transition' => 'down', |
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'scale' => 1, |
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'rotate' => 0, |
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'fade' => 'on', |
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'last' => array( |
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'x' => 0, |
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'y' => 0, |
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'scale' => 1, |
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'rotate' => 0, |
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), |
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); |
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|
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// Set the presentation-wide settings |
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if ( '' != trim( $atts['transition'] ) ) |
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$this->presentation_settings['transition'] = $atts['transition']; |
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|
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if ( '' != trim( $atts['scale'] ) ) |
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$this->presentation_settings['scale'] = floatval( $atts['scale'] ); |
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|
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if ( '' != trim( $atts['rotate'] ) ) |
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$this->presentation_settings['rotate'] = floatval( $atts['rotate'] ); |
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|
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if ( '' != trim( $atts['fade'] ) ) |
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$this->presentation_settings['fade'] = $atts['fade']; |
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|
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// Set any settings the slides don't care about |
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if ( '' != trim( $atts['duration'] ) ) |
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$duration = floatval( $atts['duration'] ) . 's'; |
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else |
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$duration = '1s'; |
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|
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// Set the presentation size as specified or with some nicely sized dimensions |
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if ( '' != trim( $atts['width'] ) ) |
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$this->presentation_settings['width'] = intval( $atts['width'] ); |
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else |
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$this->presentation_settings['width'] = 480; |
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|
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if ( '' != trim( $atts['height'] ) ) |
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$this->presentation_settings['height'] = intval( $atts['height'] ); |
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else |
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$this->presentation_settings['height'] = 370; |
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|
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// Hide the content by default in case the scripts fail |
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$style = 'display: none; width: ' . $this->presentation_settings['width'] . 'px; height: ' . $this->presentation_settings['height'] . 'px;'; |
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|
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// Check for background color XOR background image |
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// Use a white background if nothing specified |
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if ( preg_match( '/https?\:\/\/[^\'"\s]*/', $atts['bgimg'], $matches ) ) { |
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$style .= ' background-image: url("' . esc_url( $matches[0] ) . '");'; |
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} else if ( '' != trim( $atts['bgcolor'] ) ) { |
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$style .= ' background-color: ' . esc_attr( $atts['bgcolor'] ) . ';'; |
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} else { |
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$style .= ' background-color: #fff;'; |
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} |
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|
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// Not supported message style is inlined incase the style sheet doesn't get included |
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$out = "<section class='presentation-wrapper'>"; |
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$out.= "<p class='not-supported-msg' style='display: inherit; padding: 25%; text-align: center;'>"; |
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$out.= __( 'This slideshow could not be started. Try refreshing the page or viewing it in another browser.', 'jetpack' ) . '</p>'; |
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|
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// Bail out unless the scripts were added |
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if ( $this->scripts_and_style_included ) { |
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$out.= "<div class='presentation' duration='$duration' style='$style'>"; |
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$out.= "<div class='nav-arrow-left'></div>"; |
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$out.= "<div class='nav-arrow-right'></div>"; |
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$out.= "<div class='nav-fullscreen-button'></div>"; |
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$out.= do_shortcode( $content ); |
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$out.= "</section>"; |
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} |
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|
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$out.= "</section>"; |
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|
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$this->presentation_initialized = false; |
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return $out; |
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} |
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|
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function slide_shortcode( $atts, $content = '' ) { |
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// Bail out unless wrapped by a [presentation] shortcode |
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if ( ! $this->presentation_initialized ) |
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return $content; |
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|
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$atts = shortcode_atts( array( |
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'transition' => '', |
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'scale' => '', |
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'rotate' => '', |
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'fade' => '', |
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'bgcolor' => '', |
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'bgimg' => '', |
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), $atts ); |
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|
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// Determine positioning based on transition |
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if ( '' == trim( $atts['transition'] ) ) |
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$atts['transition'] = $this->presentation_settings['transition']; |
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|
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// Setting the content scale |
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if ( '' == trim( $atts['scale'] ) ) |
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$atts['scale'] = $this->presentation_settings['scale']; |
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|
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if( '' == trim( $atts['scale'] ) ) |
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$scale = 1; |
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else |
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$scale = floatval( $atts['scale'] ); |
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|
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if ( $scale < 0 ) |
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$scale *= -1; |
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|
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// Setting the content rotation |
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if ( '' == trim( $atts['rotate'] ) ) |
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$atts['rotate'] = $this->presentation_settings['rotate']; |
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|
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if( '' == trim( $atts['rotate'] ) ) |
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$rotate = 0; |
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else |
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$rotate = floatval( $atts['rotate'] ); |
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|
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// Setting if the content should fade |
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if ( '' == trim( $atts['fade'] ) ) |
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$atts['fade'] = $this->presentation_settings['fade']; |
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|
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if ( 'on' == $atts['fade'] || 'true' == $atts['fade'] ) |
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$fade = 'fade'; |
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else |
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$fade = ''; |
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|
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$coords = $this->get_coords( array( |
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'transition' => $atts['transition'], |
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'scale' => $scale, |
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'rotate' => $rotate, |
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)); |
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|
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$x = $coords['x']; |
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$y = $coords['y']; |
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|
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// Check for background color XOR background image |
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// Use a white background if nothing specified |
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if ( preg_match( '/https?\:\/\/[^\'"\s]*/', $atts['bgimg'], $matches ) ) { |
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$style = 'background-image: url("' . esc_url( $matches[0] ) . '");'; |
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} else if ( '' != trim( $atts['bgcolor'] ) ) { |
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$style = 'background-color: ' . esc_attr( $atts['bgcolor'] ) . ';'; |
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} else { |
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$style = ''; |
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} |
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|
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// Put everything together and let jmpress do the magic! |
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$out = "<div class='step $fade' data-x='$x' data-y='$y' data-scale='$scale' data-rotate='$rotate' style='$style'>"; |
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$out.= "<div class='slide-content'>"; |
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$out.= do_shortcode( $content ); |
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$out.= "</div></div>"; |
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return $out; |
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} |
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|
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/** |
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* Determines the position of the next slide based on the position and scaling of the previous slide. |
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* |
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* @param array $args: an array with the following key-value pairs |
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* string $transition: the transition name, "up", "down", "left", or "right" |
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* float $scale: the scale of the next slide (used to determine the position of the slide after that) |
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* |
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* @return array with the 'x' and 'y' coordinates of the slide |
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*/ |
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function get_coords( $args ) { |
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if ( 0 == $args['scale'] ) |
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$args['scale'] = 1; |
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|
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$width = $this->presentation_settings['width']; |
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$height = $this->presentation_settings['height']; |
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$last = $this->presentation_settings['last']; |
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$scale = $last['scale']; |
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|
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$next = array( |
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'x' => $last['x'], |
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'y' => $last['y'], |
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'scale' => $args['scale'], |
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'rotate' => $args['rotate'], |
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); |
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|
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// All angles are measured from the vertical axis, so everything is backwards! |
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$diagAngle = atan2( $width, $height ); |
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$diagonal = sqrt( pow( $width, 2 ) + pow( $height, 2 ) ); |
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|
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// We offset the angles by the angle formed by the diagonal so that |
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// we can multiply the sines directly against the diagonal length |
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$theta = deg2rad( $last['rotate'] ) - $diagAngle; |
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$phi = deg2rad( $next['rotate'] ) - $diagAngle; |
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|
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// We start by displacing by the slide dimensions |
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$totalHorizDisp = $width * $scale; |
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$totalVertDisp = $height * $scale; |
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|
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// If the previous slide was rotated, we add the incremental offset from the rotation |
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// Namely the difference between the regular dimension (no rotation) and the component |
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// of the diagonal for that angle |
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$totalHorizDisp += ( ( ( abs( sin( $theta ) ) * $diagonal) - $width ) / 2) * $scale; |
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$totalVertDisp += ( ( ( abs( cos( $theta ) ) * $diagonal) - $height) / 2) * $scale; |
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|
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// Similarly, we check if the current slide has been rotated and add whatever additional |
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// offset has been added. This is so that two rotated corners don't clash with each other. |
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// Note: we are checking the raw angle relative to the vertical axis, NOT the diagonal angle. |
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if ( $next['rotate'] % 180 != 0 ){ |
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$totalHorizDisp += ( abs( ( sin( $phi ) * $diagonal ) - $width ) / 2) * $next['scale']; |
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$totalVertDisp += ( abs( ( cos( $phi ) * $diagonal ) - $height ) / 2) * $next['scale']; |
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} |
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|
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switch ( trim( $args['transition'] ) ) { |
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case 'none': |
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break; |
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|
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case 'left': |
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$next['x'] -= $totalHorizDisp; |
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break; |
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|
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case 'right': |
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$next['x'] += $totalHorizDisp; |
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break; |
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|
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case 'up': |
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$next['y'] -= $totalVertDisp; |
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break; |
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|
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case 'down': |
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default: |
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$next['y'] += $totalVertDisp; |
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break; |
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} |
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|
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$this->presentation_settings['last'] = $next; |
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return $next; |
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} |
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} |
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|
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$GLOBALS['presentations'] = new Presentations(); |
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endif; |
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|
