/**
* Course-specific information to be output immediately above content on any course page
*
* See {@link format_base::course_header()} for usage
*
* @return null|renderable null for no output or object with data for plugin renderer
*/
public function course_content_header()
{
global $PAGE;
// if we are on course view page for particular section, return 'back to parent' control
if ($this->get_viewed_section()) {
$section = $this->get_section($this->get_viewed_section());
if ($section->parent) {
$sr = $this->find_collapsed_parent($section->parent);
$text = new lang_string('backtosection', 'format_flexsections', $this->get_section_name($section->parent));
} else {
$sr = 0;
$text = new lang_string('backtocourse', 'format_flexsections', $this->get_course()->fullname);
}
$url = $this->get_view_url($section->section, array('sr' => $sr));
return new format_flexsections_edit_control('backto', $url, strip_tags($text));
}
// if we are on module view page, return 'back to section' control
if ($PAGE->context && $PAGE->context->contextlevel == CONTEXT_MODULE && $PAGE->cm) {
$sectionnum = $PAGE->cm->sectionnum;
if ($sectionnum) {
$text = new lang_string('backtosection', 'format_flexsections', $this->get_section_name($sectionnum));
} else {
$text = new lang_string('backtocourse', 'format_flexsections', $this->get_course()->fullname);
}
return new format_flexsections_edit_control('backto', $this->get_view_url($sectionnum), strip_tags($text));
}
return parent::course_content_header();
}
