Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle 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.

//

// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Base capability table.

 *

 * @package    core_role

 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

/**

 * This class represents a table with one row for each of a list of capabilities

 * where the first cell in the row contains the capability name, and there is

 * arbitrary stuff in the rest of the row. This class is used by

 * admin/roles/manage.php, override.php and check.php.

 *

 * An ajaxy search UI shown at the top, if JavaScript is on.

 */

abstract class core_role_capability_table_base {

    /** The context this table relates to. */

    protected $context;

    /** The capabilities to display. Initialised as $context->get_capabilities(). */

    protected $capabilities = array();

    /** Added as an id="" attribute to the table on output. */

    protected $id;

    /** Added to the class="" attribute on output. */

    protected $classes = array('rolecap table-hover');

    /** Default number of capabilities in the table for the search UI to be shown. */

    const NUM_CAPS_FOR_SEARCH = 12;

    /**

     * Constructor.

     * @param context $context the context this table relates to.

     * @param string $id what to put in the id="" attribute.

     */

    public function __construct(context $context, $id) {

        $this->context = $context;

        $this->capabilities = $context->get_capabilities();

        $this->id = $id;

    }

    /**

     * Use this to add class="" attributes to the table. You get the rolecap by

     * default.

     * @param array $classnames of class names.

     */

    public function add_classes($classnames) {

        $this->classes = array_unique(array_merge($this->classes, $classnames));

    }

    /**

     * Display the table.

     */

    public function display() {

        if (count($this->capabilities) > self::NUM_CAPS_FOR_SEARCH) {

            global $PAGE;

            $jsmodule = array(

                'name' => 'rolescapfilter',

                'fullpath' => '/admin/roles/module.js',

                'strings' => array(

                    array('filter', 'moodle'),

                    array('clear', 'moodle'),                ),

                'requires' => array('node', 'cookie', 'escape')

            );

            $PAGE->requires->js_init_call('M.core_role.init_cap_table_filter', array($this->id, $this->context->id), false,

                $jsmodule);

        }

        echo '<table class="' . implode(' ', $this->classes) . '" id="' . $this->id . '">' . "\n<thead>\n";

        echo '<tr><th class="name" align="left" scope="col">' . get_string('capability', 'core_role') . '</th>';

        $this->add_header_cells();

        echo "</tr>\n</thead>\n<tbody>\n";

        // Loop over capabilities.

        $contextlevel = 0;

        $component = '';

        foreach ($this->capabilities as $capability) {

            if ($this->skip_row($capability)) {

                continue;

            }

            // Prints a breaker if component or name or context level has changed.

            if (component_level_changed($capability, $component, $contextlevel)) {

                $this->print_heading_row($capability);

            }

            $contextlevel = $capability->contextlevel;

            $component = $capability->component;

            // Start the row.

            $rowattributes = $this->get_row_attributes($capability);

            // Handle class attributes same as other.

            $rowclasses = array_unique(array_merge(array('rolecap'), $this->get_row_classes($capability)));

            if (array_key_exists('class', $rowattributes)) {

                $rowclasses = array_unique(array_merge($rowclasses, array($rowattributes['class'])));

            }

            $rowattributes['class']  = implode(' ', $rowclasses);

            // Table cell for the capability name.

            $contents = '<th scope="row" class="name"><span class="cap-desc">' . get_capability_docs_link($capability) .

                '<span class="cap-name">' . $capability->name . '</span></span></th>';

            // Add the cells specific to this table.

            $contents .= $this->add_row_cells($capability);

            echo html_writer::tag('tr', $contents, $rowattributes);

        }

        // End of the table.

        echo "</tbody>\n</table>\n";

    }

    /**

     * Used to output a heading rows when the context level or component changes.

     * @param stdClass $capability gives the new component and contextlevel.

     */

    protected function print_heading_row($capability) {

        echo '<tr class="rolecapheading header"><td colspan="' . (1 + $this->num_extra_columns()) . '" class="header"><strong>' .

            get_component_string($capability->component, $capability->contextlevel) .

            '</strong></td></tr>';

    }

    /**

     * For subclasses to override, output header cells, after the initial capability one.

     */

    abstract protected function add_header_cells();

    /**

     * For subclasses to override, return the number of cells that add_header_cells/add_row_cells output.

     */

    abstract protected function num_extra_columns();

    /**

     * For subclasses to override. Allows certain capabilties

     * to be left out of the table.

     *

     * @param object $capability the capability this row relates to.

     * @return boolean. If true, this row is omitted from the table.

     */

    protected function skip_row($capability) {

        return false;

    }

    /**

     * For subclasses to override. A change to reaturn class names that are added

     * to the class="" attribute on the <tr> for this capability.

     *

     * @param stdClass $capability the capability this row relates to.

     * @return array of class name strings.

     */

    protected function get_row_classes($capability) {

        return array();

    }

    /**

     * For subclasses to override. Additional attributes to be added to

     * each table row for the capability

     *

     * @param stdClass $capability the capability this row relates to.

     * @return array attribute names and their values.

     */

    protected function get_row_attributes($capability) {

        return array();

    }

    /**

     * For subclasses to override. Output the data cells for this capability. The

     * capability name cell will already have been output.

     *

     * You can rely on get_row_classes always being called before add_row_cells.

     *

     * @param stdClass $capability the capability this row relates to.

     * @return string html of row cells

     */

    abstract protected function add_row_cells($capability);

}