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Daryl Koopersmith. Powered by jmpress.js * * HOW TO: How the plugin settings are organized and which features are supported. * * The entire presentation should be wrapped with a [presentation] shortcode, and every * individual slide should be wrapped with a [slide] shortcode. Any settings supported * by [slide] can be set into [presentation], which will apply that setting for the entire * presentation unless overridden by individual slides. * * - [presentation] only settings: * - duration: transition durations, default is one second. * - height: content height, default is 400px * - width: content width, default is 550px * - autoplay: delay between transitions in seconds, default 3s * when set the presentation will automatically transition between slides * as long as the presentation remains in focus * * - [slide] settings: * - transition: specifies where the next slide will be placed relative * to the last one before it. Supported values are "up", "down" * "left", "right", or "none". Default value is "down". * * - scale: scales the content relative to other slides, default value is one * * - rotate: rotates the content by the specified degrees, default is zero * * - fade: slides will fade in and out during transition. Values of "on" or * "true" will enable fading, while values of "no" or "false" will * disable it. Default value is "on" * * - bgcolor: specifies a background color for the slides. Any CSS valid value * is permitted. Default color is transparent. * * - bgimg: specifies an image url which will fill the background. Image is * set to fill the background 100% width and height * * - fadebullets: any html
  • tags will start out with an opacity of 0 and any * subsequent slide transitions will show the bullets one by one * * Known issues: * * - IE 7/8 are not supported by jmpress and presentations will not work * - IE 9 will not animate transitions at all, though it's possible to at least * switch between slides. * - Infinite Scroll themes will not load presentations properly unless the post * happens to be on the first loaded page. The permalink page will function * properly, however. * - Exiting fullscreen mode will not properly reset the scroll locations in Safari * * @package automattic/jetpack */ use Automattic\Jetpack\Assets; if ( ! defined( 'ABSPATH' ) ) { exit( 0 ); } if ( ! class_exists( 'Presentations' ) ) : /** * Create a shortcode to display Presentations and slides. */ class Presentations { /** * Presentation settings. * * @var array */ private $presentation_settings; /** * Do we have a Presentation shortcode to be displayed. * * @var bool */ private $presentation_initialized; /** * Were scripts and styles enqueued already. * * @var bool */ private $scripts_and_style_included; /** * Constructor */ public function __construct() { $this->presentation_initialized = false; $this->scripts_and_style_included = false; // Registers shortcodes. add_action( 'wp_head', array( $this, 'add_scripts' ), 1 ); add_shortcode( 'presentation', array( $this, 'presentation_shortcode' ) ); add_shortcode( 'slide', array( $this, 'slide_shortcode' ) ); } /** * Enqueue all scripts and styles. */ public function add_scripts() { $this->scripts_and_style_included = false; if ( empty( $GLOBALS['posts'] ) || ! is_array( $GLOBALS['posts'] ) ) { return; } foreach ( $GLOBALS['posts'] as $p ) { if ( isset( $p->post_content ) && has_shortcode( $p->post_content, 'presentation' ) ) { $this->scripts_and_style_included = true; break; } } if ( ! $this->scripts_and_style_included ) { return; } $plugin = plugin_dir_url( __FILE__ ); // Add CSS. wp_enqueue_style( 'presentations', $plugin . 'css/style.css', array(), JETPACK__VERSION ); // Add JavaScript. wp_enqueue_script( 'jquery' ); wp_register_script( 'jetpack-shortcode-deps', plugins_url( '_inc/build/shortcodes/js/dependencies.min.js', JETPACK__PLUGIN_FILE ), array( 'jquery' ), '20251030', true ); wp_enqueue_script( 'presentations', Assets::get_file_url_for_environment( '_inc/build/shortcodes/js/main.min.js', 'modules/shortcodes/js/main.js' ), array( 'jquery', 'jetpack-shortcode-deps' ), JETPACK__VERSION, true ); } /** * Main Presentation shortcode. * * @param array $atts Shortcode attributes. * @param string $content Post content. */ public function presentation_shortcode( $atts, $content = '' ) { // Mark that we've found a valid [presentation] shortcode. $this->presentation_initialized = true; $atts = shortcode_atts( array( 'duration' => '', 'height' => '', 'width' => '', 'bgcolor' => '', 'bgimg' => '', 'autoplay' => '', // Settings. 'transition' => '', 'scale' => '', 'rotate' => '', 'fade' => '', 'fadebullets' => '', ), $atts, 'presentation' ); $this->presentation_settings = array( 'transition' => 'down', 'scale' => 1, 'rotate' => 0, 'fade' => 'on', 'fadebullets' => 0, 'last' => array( 'x' => 0, 'y' => 0, 'scale' => 1, 'rotate' => 0, ), ); // Set the presentation-wide settings. if ( '' !== trim( $atts['transition'] ) ) { $this->presentation_settings['transition'] = $atts['transition']; } if ( '' !== trim( $atts['scale'] ) ) { $this->presentation_settings['scale'] = (float) $atts['scale']; } if ( '' !== trim( $atts['rotate'] ) ) { $this->presentation_settings['rotate'] = (float) $atts['rotate']; } if ( '' !== trim( $atts['fade'] ) ) { $this->presentation_settings['fade'] = $atts['fade']; } if ( '' !== trim( $atts['fadebullets'] ) ) { $this->presentation_settings['fadebullets'] = $atts['fadebullets']; } // Set any settings the slides don't care about. if ( '' !== trim( $atts['duration'] ) ) { $duration = (float) $atts['duration'] . 's'; } else { $duration = '1s'; } // Autoplay durations are set in milliseconds. if ( '' !== trim( $atts['autoplay'] ) ) { $autoplay = (float) $atts['autoplay'] * 1000; } else { $autoplay = 0; } // No autoplay // Set the presentation size as specified or with some nicely sized dimensions. if ( '' !== trim( $atts['width'] ) ) { $this->presentation_settings['width'] = (int) $atts['width']; } else { $this->presentation_settings['width'] = 480; } if ( '' !== trim( $atts['height'] ) ) { $this->presentation_settings['height'] = (int) $atts['height']; } else { $this->presentation_settings['height'] = 370; } // Hide the content by default in case the scripts fail. $style = 'display: none; width: ' . $this->presentation_settings['width'] . 'px; height: ' . $this->presentation_settings['height'] . 'px;'; /* * Check for background color XOR background image * Use a white background if nothing specified */ if ( preg_match( '/https?\:\/\/[^\'"\s]*/', $atts['bgimg'], $matches ) ) { $style .= ' background-image: url("' . esc_url( $matches[0] ) . '");'; } elseif ( '' !== trim( $atts['bgcolor'] ) ) { $style .= ' background-color: ' . esc_attr( $atts['bgcolor'] ) . ';'; } else { $style .= ' background-color: #fff;'; } // Not supported message style is inlined incase the style sheet doesn't get included. $out = "
    "; $out .= "

    "; $out .= __( 'This slideshow could not be started. Try refreshing the page or viewing it in another browser.', 'jetpack' ) . '

    '; $out .= sprintf( '
    ', esc_attr( $duration ), esc_attr( $autoplay ), esc_attr( $style ) ); $out .= ""; $out .= ""; $out .= ""; if ( $autoplay ) { $out .= ''; } $out .= do_shortcode( $content ); $out .= '
    '; $this->presentation_initialized = false; return $out; } /** * Slide shortcode. * * @param array $atts Shortcode attributes. * @param string $content Post content. */ public function slide_shortcode( $atts, $content = '' ) { // Bail out unless wrapped by a [presentation] shortcode. if ( ! $this->presentation_initialized ) { return $content; } $atts = shortcode_atts( array( 'transition' => '', 'scale' => '', 'rotate' => '', 'fade' => '', 'fadebullets' => '', 'bgcolor' => '', 'bgimg' => '', ), $atts, 'slide' ); // Determine positioning based on transition. if ( '' === trim( $atts['transition'] ) ) { $atts['transition'] = $this->presentation_settings['transition']; } // Setting the content scale. if ( '' === trim( $atts['scale'] ) ) { $atts['scale'] = $this->presentation_settings['scale']; } if ( '' === trim( $atts['scale'] ) ) { $scale = 1; } else { $scale = (float) $atts['scale']; } if ( $scale < 0 ) { $scale *= -1; } // Setting the content rotation. if ( '' === trim( $atts['rotate'] ) ) { $atts['rotate'] = $this->presentation_settings['rotate']; } if ( '' === trim( $atts['rotate'] ) ) { $rotate = 0; } else { $rotate = (float) $atts['rotate']; } // Setting if the content should fade. if ( '' === trim( $atts['fade'] ) ) { $atts['fade'] = $this->presentation_settings['fade']; } if ( 'on' === $atts['fade'] || 'true' === $atts['fade'] ) { $fade = 'fade'; } else { $fade = ''; } // Setting if bullets should fade on step changes. if ( '' === trim( $atts['fadebullets'] ) ) { $atts['fadebullets'] = $this->presentation_settings['fadebullets']; } if ( 'on' === $atts['fadebullets'] || 'true' === $atts['fadebullets'] ) { $fadebullets = 'fadebullets'; } else { $fadebullets = ''; } $coords = $this->get_coords( array( 'transition' => $atts['transition'], 'scale' => $scale, 'rotate' => $rotate, ) ); $x = $coords['x']; $y = $coords['y']; /* * Check for background color XOR background image * Use a white background if nothing specified */ if ( preg_match( '/https?\:\/\/[^\'"\s]*/', $atts['bgimg'], $matches ) ) { $style = 'background-image: url("' . esc_url( $matches[0] ) . '");'; } elseif ( '' !== trim( $atts['bgcolor'] ) ) { $style = 'background-color: ' . esc_attr( $atts['bgcolor'] ) . ';'; } else { $style = ''; } // Put everything together and let jmpress do the magic! $out = sprintf( '
    ', esc_attr( $fade ), esc_attr( $fadebullets ), esc_attr( $x ), esc_attr( $y ), esc_attr( $scale ), esc_attr( $rotate ), esc_attr( $style ) ); $out .= '
    '; $out .= do_shortcode( $content ); $out .= '
    '; return $out; } /** * Determines the position of the next slide based on the position and scaling of the previous slide. * * @param array $args { * Array of key-value pairs. * * @type string $transition: the transition name, "up", "down", "left", or "right". * @type float $scale: the scale of the next slide (used to determine the position of the slide after that). * } * * @return array with the 'x' and 'y' coordinates of the slide. */ private function get_coords( $args ) { if ( 0 === $args['scale'] ) { $args['scale'] = 1; } $width = $this->presentation_settings['width']; $height = $this->presentation_settings['height']; $last = $this->presentation_settings['last']; $scale = $last['scale']; $next = array( 'x' => $last['x'], 'y' => $last['y'], 'scale' => $args['scale'], 'rotate' => $args['rotate'], ); // All angles are measured from the vertical axis, so everything is backwards! $diag_angle = atan2( $width, $height ); $diagonal = sqrt( pow( $width, 2 ) + pow( $height, 2 ) ); /* * We offset the angles by the angle formed by the diagonal so that * we can multiply the sines directly against the diagonal length */ $theta = deg2rad( $last['rotate'] ) - $diag_angle; $phi = deg2rad( $next['rotate'] ) - $diag_angle; // We start by displacing by the slide dimensions. $total_horiz_disp = $width * $scale; $total_vert_disp = $height * $scale; /* * If the previous slide was rotated, we add the incremental offset from the rotation * Namely the difference between the regular dimension (no rotation) and the component * of the diagonal for that angle */ $total_horiz_disp += ( ( ( abs( sin( $theta ) ) * $diagonal ) - $width ) / 2 ) * $scale; $total_vert_disp += ( ( ( abs( cos( $theta ) ) * $diagonal ) - $height ) / 2 ) * $scale; /* * Similarly, we check if the current slide has been rotated and add whatever additional * offset has been added. This is so that two rotated corners don't clash with each other. * Note: we are checking the raw angle relative to the vertical axis, NOT the diagonal angle. */ if ( 0 !== $next['rotate'] % 180 ) { $total_horiz_disp += ( abs( ( sin( $phi ) * $diagonal ) - $width ) / 2 ) * $next['scale']; $total_vert_disp += ( abs( ( cos( $phi ) * $diagonal ) - $height ) / 2 ) * $next['scale']; } switch ( trim( $args['transition'] ) ) { case 'none': break; case 'left': $next['x'] -= $total_horiz_disp; break; case 'right': $next['x'] += $total_horiz_disp; break; case 'up': $next['y'] -= $total_vert_disp; break; case 'down': default: $next['y'] += $total_vert_disp; break; } $this->presentation_settings['last'] = $next; return $next; } } $GLOBALS['presentations'] = new Presentations(); endif;