tc-lib-pdf/examples/E071_gettextcell_bbox_metrics.php at main · tecnickcom/tc-lib-pdf · GitHub

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<?php
/**
 * E071_gettextcell_bbox_metrics.php
 *
 * @since       2026-05-06
 * @category    Library
 * @package     Pdf
 * @author      Nicola Asuni <info@tecnick.com>
 * @copyright   2002-2026 Nicola Asuni - Tecnick.com LTD
 * @license     https://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE.TXT)
 * @link        https://github.com/tecnickcom/tc-lib-pdf
 *
 * This file is part of tc-lib-pdf software library.
 */

// NOTE: run make deps fonts in the project root to generate the dependencies and example fonts.

// autoloader when using Composer
require(__DIR__ . '/../vendor/autoload.php');

// define fonts directory
\define('K_PATH_FONTS', \realpath(__DIR__ . '/../vendor/tecnickcom/tc-lib-pdf-font/target/fonts'));

$pdf = new \Com\Tecnick\Pdf\Tcpdf(
    'mm',
    true,
    false,
    true,
    '',
    null,
);

$pdf->setCreator('tc-lib-pdf');
$pdf->setAuthor('Nicola Asuni');
$pdf->setSubject('tc-lib-pdf example: 071');
$pdf->setTitle('getTextCell bbox metrics');
$pdf->setKeywords('TCPDF tc-lib-pdf example getTextCell bbox textbbox cellbbox');
$pdf->setPDFFilename('071_gettextcell_bbox_metrics.pdf');

$pdf->setViewerPreferences(['DisplayDocTitle' => true]);
$pdf->enableDefaultPageContent();

$baseFont = $pdf->font->insert($pdf->pon, 'helvetica', '', 12);

$pdf->addPage();

$titleFont = $pdf->font->insert($pdf->pon, 'helvetica', 'B', 14);
$textFont = $pdf->font->insert($pdf->pon, 'helvetica', '', 12);
$monoFont = $pdf->font->insert($pdf->pon, 'courier', '', 10);

$pdf->page->addContent($titleFont['out']);
$pdf->page->addContent($pdf->getTextCell('E071: getTextCell multiline bbox metrics', 20, 20, 170, 0, 0, 0, 'T', 'L'));

$pdf->page->addContent($textFont['out']);

$blockStyles = [
    'all' => [
        'lineWidth' => 0.4,
        'lineCap' => 'butt',
        'lineJoin' => 'miter',
        'dashArray' => [],
        'dashPhase' => 0,
        'lineColor' => '#006699',
        'fillColor' => '#f3f8fb',
    ],
];

// Custom cell arrays use internal points, so convert desired 5 mm padding first.
$padding5mm = $pdf->toPoints(5.0);

$cellPadding5mm = [
    'margin' => [
        'T' => 0,
        'R' => 0,
        'B' => 0,
        'L' => 0,
    ],
    'padding' => [
        'T' => $padding5mm,
        'R' => $padding5mm,
        'B' => $padding5mm,
        'L' => $padding5mm,
    ],
];

$multiline = 'Line 1: This text uses getTextCell with automatic wrapping.' . "\n"
    . 'Line 2: The border is visible so the cell bounds can be compared.' . "\n"
    . 'Line 3: Metrics printed below come from getLastBBox(), getLastTextBBox(), and getLastCellBBox().';

$pdf->page->addContent(
    $pdf->getTextCell(
        $multiline,
        20,
        35,
        170,
        0,
        0,
        1.5,
        'T',
        'L',
        $cellPadding5mm,
        $blockStyles,
        0,
        0,
        0,
        0,
        true,
        true,
        false,
        false,
        false,
        false,
        false,
        true,
    )
);

$bbox = $pdf->getLastBBox();
$textbbox = $pdf->getLastTextBBox();
$cellbbox = $pdf->getLastCellBBox();

$fmtMetric = static fn(float $value): string => \sprintf('%7.3F', $value);

$pdf->page->addContent($monoFont['out']);

$metricsText =
    'bbox     : x=' . $fmtMetric($bbox['x'])
    . '  y=' . $fmtMetric($bbox['y'])
    . '  w=' . $fmtMetric($bbox['w'])
    . '  h=' . $fmtMetric($bbox['h']) . "\n"
    . 'textbbox : x=' . $fmtMetric($textbbox['x'])
    . '  y=' . $fmtMetric($textbbox['y'])
    . '  w=' . $fmtMetric($textbbox['w'])
    . '  h=' . $fmtMetric($textbbox['h']) . "\n"
    . 'cellbbox : x=' . $fmtMetric($cellbbox['x'])
    . '  y=' . $fmtMetric($cellbbox['y'])
    . '  w=' . $fmtMetric($cellbbox['w'])
    . '  h=' . $fmtMetric($cellbbox['h']);

$metricsPosY = $cellbbox['y'] + $cellbbox['h'] + 8;

$pdf->page->addContent(
    $pdf->getTextCell(
        $metricsText,
        20,
        $metricsPosY,
        170,
        0,
        0,
        1,
        'T',
        'L',
    )
);

$rawpdf = $pdf->getOutPDFString();
$pdf->renderPDF($rawpdf);