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[FEATURE] Use codehighlighting in backend preview #4

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[FEATURE] Use codehighlighting in backend preview #4

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49 changes: 43 additions & 6 deletions Classes/Hooks/CodeblockPreviewRenderer.php
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
<?php
declare(strict_types=1);

namespace B13\Codeblock\Hooks;

/*
Expand All @@ -9,8 +11,11 @@
* of the License, or any later version.
*/

use Highlight\Highlighter;
use TYPO3\CMS\Backend\View\PageLayoutView;
use TYPO3\CMS\Backend\View\PageLayoutViewDrawItemHookInterface;
use TYPO3\CMS\Core\Configuration\ExtensionConfiguration;
use TYPO3\CMS\Core\Page\PageRenderer;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
Expand All @@ -33,14 +38,46 @@ public function preProcess(
&$headerContent,
&$itemContent,
array &$row
) {
if ($row['CType'] === 'codeblock') {
if ($row['bodytext']) {
$bodytext = GeneralUtility::fixed_lgd_cs($row['bodytext'], 1000);
$itemContent .= $parentObject->linkEditContent(nl2br(htmlentities($bodytext)), $row) . '<br />';
)
{
if ($row['CType'] === 'codeblock' && $row['bodytext']) {
$highlight = GeneralUtility::makeInstance(Highlighter::class);

if (!$row['code_language']) {
$languages = $highlight->listLanguages();
$highlight->setAutodetectLanguages($languages);
$highlighted = $highlight->highlightAuto($row['bodytext']);
} else {
$highlighted = $highlight->highlight($row['code_language'], $row['bodytext']);
}

$drawItem = false;
$bodytext = '<pre style="padding:2px;"><code class="hljs ' . $highlighted->language . '">' . $highlighted->value . '</code></pre>';
$itemContent .= $parentObject->linkEditContent((($bodytext)), $row);

$styles = $this->getStyles();
if ($styles) {
$pageRenderer = GeneralUtility::makeInstance(PageRenderer::class);
$pageRenderer->addCssInlineBlock('ext-codeblock', $styles);
}
}

$drawItem = false;
}

protected function getStyles(): string
{
$previewFile = '';
try {
$previewFile = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get('codeblock', 'backendPreviewStyles');
} catch (\Exception $e) {
// do nothing
}
$previewFile = GeneralUtility::getFileAbsFileName($previewFile);

if (!is_file($previewFile)) {
$previewFile = GeneralUtility::getFileAbsFileName('EXT:codeblock/Resources/Public/Styles/GitHub.css');
}

return file_get_contents($previewFile);
}
}
93 changes: 93 additions & 0 deletions Resources/Public/Styles/GitHub.css
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Original file line number Diff line number Diff line change
@@ -0,0 +1,93 @@
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #333;
background: #f8f8f8;
}

.hljs-comment,
.hljs-quote {
color: #998;
font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
color: #333;
font-weight: bold;
}

.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
color: #008080;
}

.hljs-string,
.hljs-doctag {
color: #d14;
}

.hljs-title,
.hljs-section,
.hljs-selector-id {
color: #900;
font-weight: bold;
}

.hljs-subst {
font-weight: normal;
}

.hljs-type,
.hljs-class .hljs-title {
color: #458;
font-weight: bold;
}

.hljs-tag,
.hljs-name,
.hljs-attribute {
color: #000080;
font-weight: normal;
}

.hljs-regexp,
.hljs-link {
color: #009926;
}

.hljs-symbol,
.hljs-bullet {
color: #990073;
}

.hljs-built_in,
.hljs-builtin-name {
color: #0086b3;
}

.hljs-meta {
color: #999;
font-weight: bold;
}

.hljs-deletion {
background: #fdd;
}

.hljs-addition {
background: #dfd;
}

.hljs-emphasis {
font-style: italic;
}

.hljs-strong {
font-weight: bold;
}
2 changes: 2 additions & 0 deletions ext_conf_template.txt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
# cat=Backend; type=string; label=CSS file for backend preview
backendPreviewStyles = EXT:codeblock/Resources/Public/Styles/GitHub.css