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✏️ Editing: DiffRenderer.php

<?php

require_once ABSPATH . WPINC . '/Text/Diff.php';
require_once ABSPATH . WPINC . '/Text/Diff/Renderer.php';
require_once ABSPATH . WPINC . '/Text/Diff/Renderer/inline.php';
require_once ABSPATH . WPINC . '/wp-diff.php';

/**
 * Diff renderer extending that which WordPress uses for post revisions.
 */
class Loco_output_DiffRenderer extends WP_Text_Diff_Renderer_Table {

/**
     * {@inheritdoc}
     */
    public function __construct( $params = array() ){
        parent::__construct( $params + array (
            'show_split_view' => true,
            'leading_context_lines' => 1,
            'trailing_context_lines' => 1,
        ) );
    }

/**
     * Render diff of two files, presumed to be PO or POT
     * @param Loco_fs_File Left hand file
     * @param Loco_fs_File Right hand file
     * @return string HTML table
     */
    public function renderFiles( Loco_fs_File $lhs, Loco_fs_File $rhs ){
        loco_require_lib('compiled/gettext.php');
        // attempt to raise memory limit to WP_MAX_MEMORY_LIMIT
        if( function_exists('wp_raise_memory_limit') ){
            wp_raise_memory_limit('loco');
        }
        // like wp_text_diff but avoiding whitespace normalization
        // uses deprecated signature for 'auto' in case of old WordPress
        return $this->render( new Text_Diff( self::splitFile($lhs), self::splitFile($rhs) ) );
    }

/**
     * @param Loco_fs_File
     * @return string[]
     */
    private static function splitFile(  Loco_fs_File $file ){
        $src = $file->getContents();
        $src = Loco_gettext_Data::ensureUtf8($src);
        $arr = preg_split( '/\\r?\\n/', $src );
        if( ! is_array($arr) ){
            $f = new Loco_mvc_FileParams( array(), $file );
            throw new Loco_error_Exception('Failed to split '.$f->relpath.' ('.$f->size.')' );
        }
        return $arr;
    }

/**
     * {@inheritdoc}
     */
    public function _startDiff() {
        return "<table class=\"diff\">\n";
    }

/**
     * {@inheritdoc}
     */
    public function _endDiff() {
        return "</table>\n";
    }

/**
     * {@inheritdoc}
     */
    public function _startBlock( $header ) {
        return '<tbody data-diff="'.esc_attr($header)."\">\n";
    }

/**
     * {@inheritdoc}
     */
    public function _endBlock() {
        return "</tbody>\n";
    }

}

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