swat/Swat/SwatAccordion.php at 33587e2d76d5087569983c366409210563418840 · silverorange/swat · GitHub

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<?php

/**
 * Accordion widget containing {@link SwatNoteBookPage} pages.
 *
 * This widget is like a notebook but instead of tabs, pages are displayed
 * stacked and open and close like disclosures. It sounds like a ye-olde
 * squeezebox.
 *
 * @package   Swat
 * @copyright 2011-2016 silverorange
 * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
 * @see       SwatNoteBookPage
 */
class SwatAccordion extends SwatNoteBook
{
    // {{{ public properties

    /**
     * Whether or not to animate the opening/closing of the accordion
     *
     * @var boolean
     */
    public $animate = true;

    /**
     * Whether or not one page of the accordion is always open
     *
     * If false, the accordion can collapse to an all-closed state.
     *
     * @var boolean
     */
    public $always_open = false;

    // }}}
    // {{{ public function __construct()

    /**
     * Creates a new accordion view
     *
     * @param string $id a non-visable unique id for this widget.
     */
    public function __construct($id = null)
    {
        parent::__construct($id);
        $this->requires_id = true;
    }

    // }}}
    // {{{ public function display()

    /**
     * Displays this notebook
     */
    public function display()
    {
        if (!$this->visible) {
            return;
        }

        SwatWidget::display();

        $li_counter = 0;

        $ul_tag = new SwatHtmlTag('ul');
        $ul_tag->id = $this->id;
        $ul_tag->class = 'swat-accordion';
        $ul_tag->open();

        foreach ($this->pages as $page) {
            if (!$page->visible) {
                continue;
            }

            $li_counter++;
            $li_tag = new SwatHtmlTag('li');
            $li_tag->id = $page->id;

            if ($page->id === $this->selected_page) {
                $li_tag->class = 'swat-accordion-page selected';
            } else {
                $li_tag->class = 'swat-accordion-page';
            }

            $li_tag->class .= ' ' . implode(' ', $page->classes);

            $li_tag->open();

            // toggle link
            $title = $page->title === null ? '' : $page->title;
            $wrapper_span = new SwatHtmlTag('span');
            $wrapper_span->tabindex = '0';
            $wrapper_span->{'aria-role'} = 'tab';
            $wrapper_span->class = 'swat-accordion-page-toggle';
            $wrapper_span->open();

            $anchor_tag = new SwatHtmlTag('a');
            $anchor_tag->class = 'swat-accordion-page-link';
            $anchor_tag->href = '#' . $page->id;
            $em_tag = new SwatHtmlTag('em');
            $em_tag->setContent($title, $page->title_content_type);

            $anchor_tag->open();
            $em_tag->display();
            $anchor_tag->close();

            $wrapper_span->close();

            // content
            echo '<div class="swat-accordion-page-animation">';
            echo '<div class="swat-accordion-page-content">';
            $page->display();
            echo '</div>';
            echo '</div>';

            $li_tag->close();
        }

        $ul_tag->close();
        Swat::displayInlineJavaScript($this->getInlineJavaScript());
    }

    // }}}
    // {{{ protected function getInlineJavaScript()

    /**
     * Gets the inline JavaScript used by this accordion view
     *
     * @return string the inline JavaScript used by this accordion view.
     */
    protected function getInlineJavaScript()
    {
        $javascript = sprintf(
            "var %1\$s_obj = new %2\$s('%1\$s', %3\$s);",
            $this->id,
            $this->getJavascriptClassName(),
            $this->animate ? 'true' : 'false'
        );

        $javascript .= sprintf(
            "\n%s_obj.animate = %s;",
            $this->id,
            $this->animate ? 'true' : 'false'
        );

        $javascript .= sprintf(
            "\n%s_obj.always_open = %s;",
            $this->id,
            $this->always_open ? 'true' : 'false'
        );

        return $javascript;
    }

    // }}}
    // {{{ protected function getJavaScriptClassName()

    protected function getJavaScriptClassName()
    {
        return 'SwatAccordion';
    }

    // }}}
}