ext_localconf.php

<?php

declare(strict_types=1);

use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
use TYPO3\CMS\Frontend\Controller\ShowImageController;

defined('TYPO3') or die();

// Register eID provider for showpic
$GLOBALS['TYPO3_CONF_VARS']['FE']['eID_include']['tx_cms_showpic'] = ShowImageController::class . '::processRequest';

ExtensionManagementUtility::addTypoScriptSetup(
    '
# Creates persistent ParseFunc setup for non-HTML content.
lib.parseFunc {
    tags {
        a = TEXT
        a {
            current = 1
            typolink {
                parameter.data = parameters:href
                title.data = parameters:title
                target.data = parameters:target
                ATagParams.data = parameters:allParams
            }
        }
    }
    nonTypoTagStdWrap {
        HTMLparser = 1
        HTMLparser {
            keepNonMatchedTags = 1
            htmlSpecialChars = 2
        }
    }
}

# Creates persistent ParseFunc setup for RTE content (which is mainly HTML) based on the "default" transformation.
lib.parseFunc_RTE < lib.parseFunc
lib.parseFunc_RTE {
    # Processing <ol>, <ul> and <table> blocks separately
    externalBlocks = article, aside, blockquote, div, dd, dl, footer, header, nav, ol, section, table, ul, pre, figure, figcaption
    externalBlocks {
        ol {
            stripNL = 1
            stdWrap.parseFunc = < lib.parseFunc
        }
        ul {
            stripNL = 1
            stdWrap.parseFunc = < lib.parseFunc
        }
        pre {
            stdWrap.parseFunc < lib.parseFunc
        }
        table {
            stripNL = 1
            stdWrap {
                HTMLparser = 1
                HTMLparser {
                    keepNonMatchedTags = 1
                }
            }
            HTMLtableCells = 1
            HTMLtableCells {
                # Recursive call to self but without wrapping non-wrapped cell content
                default.stdWrap {
                    parseFunc = < lib.parseFunc_RTE
                    parseFunc.nonTypoTagStdWrap.encapsLines {
                        nonWrappedTag =
                        innerStdWrap_all.ifBlank =
                    }
                }
            }
        }
        # ideally, "div" is not calling itself recursive, but instead uses a similar approach as ol/ul/pre
        # so it is a container with content, which does not need to be wrapping <p> tags in it.
        div {
            stripNL = 1
            callRecursive = 1
        }
        article < .div
        aside < .div
        figure < .div
        figcaption {
            stripNL = 1
        }
        blockquote < .div
        footer < .div
        header < .div
        nav < .div
        section < .div
        dl < .div
        dd < .div
    }
    nonTypoTagStdWrap {
        encapsLines {
            encapsTagList = p,pre,h1,h2,h3,h4,h5,h6,hr,dt
            nonWrappedTag = P
            innerStdWrap_all.ifBlank = &nbsp;
        }
    }
}

# Content selection
styles.content.get = CONTENT
styles.content.get {
    table = tt_content
    select {
        orderBy = sorting
        where = {#colPos}=0
    }
}


# Content element rendering
tt_content = CASE
tt_content {
    key {
        field = CType
    }
    default = TEXT
    default {
        field = CType
        htmlSpecialChars = 1
        wrap = <p style="background-color: yellow; padding: 0.5em 1em;"><strong>ERROR:</strong> Content Element with uid "{field:uid}" and type "|" has no rendering definition!</p>
        wrap.insertData = 1
    }
}
    '
);

// Register search key shortcuts
$GLOBALS['TYPO3_CONF_VARS']['SYS']['livesearch']['content'] = 'tt_content';