[concrete5] [Debug tool] Tooltip to display block detail

app.php

<?php
// application/bootstrap/app.php

$dh = $app->make('helper/concrete/dashboard');
$director = $app->make('director');
$director->addListener('on_before_render', function ($event) use ($dh) {
    /** @var \Concrete\Core\View\View $view */
    $view = $event->getArgument('view');
    $page = \Concrete\Core\Page\Page::getCurrentPage();
    $p = new \Concrete\Core\Permission\Checker($page);
    if ($p->canViewToolbar() && !$dh->inDashboard()) {
        $view->addHeaderItem('<style>.block-tooltip-wrapper:hover {-webkit-box-shadow: 0px 0px 3px 0px rgba(0,0,0,0.8);box-shadow: 0px 0px 3px 0px rgba(0,0,0,0.8);}</style>');
        $view->addFooterItem('<script>$(function(){$(".block-tooltip-wrapper").tooltip()});</script>');
    }
});
$director->addListener('on_block_output', function ($event) use ($dh) {
    /** @var \Concrete\Core\Block\Events\BlockOutput $event */
    $page = \Concrete\Core\Page\Page::getCurrentPage();
    $p = new \Concrete\Core\Permission\Checker($page);
    if ($p->canViewToolbar() && !$dh->inDashboard()) {
        if (is_object($page) && !$page->isEditMode()) {
            $contents = $event->getContents();
            $block = $event->getBlock();
            $btHandle = $block->getBlockTypeHandle();
            $placement = 'bottom';
            if ($btHandle == 'core_stack_display' || $btHandle == 'core_scrapbook_display' || $btHandle == 'core_area_layout') {
                $placement = 'top';
            }
            $tooltip = sprintf('Block Type (%s) ', $btHandle);
            $tooltip .= sprintf('Block ID (%s) ', $block->getBlockID());
            $tooltip .= sprintf('Area Handle (%s) ', $block->getAreaHandle());
            $tooltip .= sprintf('Block Collection ID (%s) ', $block->getBlockCollectionID());
            $contents = sprintf('<div class="block-tooltip-wrapper %s" data-toggle="tooltip" data-placement="%s" title="%s">%s</div>', $btHandle, $placement, $tooltip, $contents);
            $event->setContents($contents);
        }
    }
});

Screenshot: