app/Report/ReportPdfFootnote.php

<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
namespace Fisharebest\Webtrees\Report;

/**
 * Class ReportPdfFootnote
 */
class ReportPdfFootnote extends ReportBaseFootnote
{
    /**
     * PDF Footnotes number renderer
     *
     * @param ReportTcpdf $renderer
     *
     * @return void
     */
    public function render($renderer)
    {
        $renderer->setCurrentStyle('footnotenum');
        $renderer->Write($renderer->getCurrentStyleHeight(), $this->numText, $this->addlink); //source link numbers after name
    }

    /**
     * Write the Footnote text
     * Uses style name "footnote" by default
     *
     * @param ReportTcpdf $pdf
     */
    public function renderFootnote($pdf)
    {
        if ($pdf->getCurrentStyle() != $this->styleName) {
            $pdf->setCurrentStyle($this->styleName);
        }
        $temptext = str_replace('#PAGENUM#', $pdf->PageNo(), $this->text);
        // Set the link to this y/page position
        $pdf->SetLink($this->addlink, -1, -1);
        // Print first the source number
        // working
        if ($pdf->getRTL()) {
            $pdf->writeHTML('<span> .' . $this->num . '</span>', false, false, false, false, '');
        } else {
            $temptext = '<span>' . $this->num . '. </span>' . $temptext;
        }
        // underline «title» part of Source item
        $temptext = str_replace([
            '«',
            '»',
        ], [
            '<u>',
            '</u>',
        ], $temptext);
        $pdf->writeHTML($temptext, true, false, true, false, '');
    }

    /**
     * Returns the height in points of the Footnote element
     *
     * @param ReportTcpdf $renderer
     *
     * @return float $h
     */
    public function getFootnoteHeight($renderer): float
    {
        return 0;
    }

    /**
     * Splits the text into lines to fit into a giving cell
     * and returns the last lines width
     *
     * @param ReportTcpdf $pdf
     *
     * @return float|array
     */
    public function getWidth($pdf)
    {
        // Setup the style name, a font must be selected to calculate the width
        $pdf->setCurrentStyle('footnotenum');

        // Check for the largest font size in the box
        $fsize = $pdf->getCurrentStyleHeight();
        if ($fsize > $pdf->largestFontHeight) {
            $pdf->largestFontHeight = $fsize;
        }

        // Returns the Object if already numbered else false
        if (empty($this->num)) {
            $pdf->checkFootnote($this);
        }

        // Get the line width
        $lw = ceil($pdf->GetStringWidth($this->numText));
        // Line Feed counter - Number of lines in the text
        $lfct = substr_count($this->numText, "\n") + 1;
        // If there is still remaining wrap width...
        if ($this->wrapWidthRemaining > 0) {
            // Check with line counter too!
            // but floor the $wrapWidthRemaining first to keep it bugfree!
            $wrapWidthRemaining = (int) ($this->wrapWidthRemaining);
            if ($lw >= $wrapWidthRemaining || $lfct > 1) {
                $newtext = '';
                $lines   = explode("\n", $this->numText);
                // Go throught the text line by line
                foreach ($lines as $line) {
                    // Line width in points
                    $lw = ceil($pdf->GetStringWidth($line));
                    // If the line has to be wraped
                    if ($lw >= $wrapWidthRemaining) {
                        $words    = explode(' ', $line);
                        $addspace = count($words);
                        $lw       = 0;
                        foreach ($words as $word) {
                            $addspace--;
                            $lw += ceil($pdf->GetStringWidth($word . ' '));
                            if ($lw < $wrapWidthRemaining) {
                                $newtext .= $word;
                                if ($addspace != 0) {
                                    $newtext .= ' ';
                                }
                            } else {
                                $lw = $pdf->GetStringWidth($word . ' ');
                                $newtext .= "\n$word";
                                if ($addspace != 0) {
                                    $newtext .= ' ';
                                }
                                // Reset the wrap width to the cell width
                                $wrapWidthRemaining = $this->wrapWidthCell;
                            }
                        }
                    } else {
                        $newtext .= $line;
                    }
                    // Check the Line Feed counter
                    if ($lfct > 1) {
                        // Add a new line feed as long as it’s not the last line
                        $newtext .= "\n";
                        // Reset the line width
                        $lw = 0;
                        // Reset the wrap width to the cell width
                        $wrapWidthRemaining = $this->wrapWidthCell;
                    }
                    $lfct--;
                }
                $this->numText = $newtext;
                $lfct          = substr_count($this->numText, "\n");

                return [
                    $lw,
                    1,
                    $lfct,
                ];
            }
        }
        $l    = 0;
        $lfct = substr_count($this->numText, "\n");
        if ($lfct > 0) {
            $l = 2;
        }

        return [
            $lw,
            $l,
            $lfct,
        ];
    }
}