YetiForceCompany/YetiForcePDF

<?php

declare(strict_types=1);

/**
 * TextBox class.
 *
 * @package   YetiForcePDF\Layout
 *
 * @copyright YetiForce Sp. z o.o
 * @license   MIT
 * @author    Rafal Pospiech <r.pospiech@yetiforce.com>
 */

namespace YetiForcePDF\Layout;

use YetiForcePDF\Math;

/**
 * Class TextBox.
 */
class TextBox extends ElementBox implements BoxInterface
{
    public bool $drawTextOutline = false;

    /**
     * @var string
     */
    protected string $text;

    /**
     * {@inheritdoc}
     */
    public function init()
    {
        parent::init();

        $this->style = (new \YetiForcePDF\Style\Style())
            ->setDocument($this->document)
            ->setBox($this)
            ->init();

        return $this;
    }

    /**
     * Set text.
     *
     * @param string $text
     *
     * @return $this
     */
    public function setText(string $text): self
    {
        $this->text = $text;
        return $this;
    }

    /**
     * Get text.
     *
     * @return string
     */
    public function getText(): string
    {
        return $this->text;
    }

    /**
     * Measure width.
     *
     * @return $this
     */
    public function measureWidth(): self
    {
        $this->getDimensions()->setWidth($this->getStyle()->getFont()->getTextWidth($this->getText()));

        return $this;
    }

    /**
     * Measure height.
     *
     * @return $this
     */
    public function measureHeight(): self
    {
        $this->getDimensions()->setHeight($this->getStyle()->getFont()->getTextHeight($this->getText()));

        return $this;
    }

    /**
     * Position.
     *
     * @return $this
     */
    public function measureOffset(): self
    {
        $this->getOffset()->setLeft('0');
        $this->getOffset()->setTop('0');

        return $this;
    }

    /**
     * Position.
     *
     * @return $this
     */
    public function measurePosition(): self
    {
        $parent = $this->getParent();
        $this->getCoordinates()->setX(Math::add($parent->getCoordinates()->getX(), $this->getOffset()->getLeft()));
        $this->getCoordinates()->setY(Math::add($parent->getCoordinates()->getY(), $this->getOffset()->getTop()));

        return $this;
    }

    public function __clone()
    {
        $this->style = clone $this->style;
        $this->offset = clone $this->offset;
        $this->dimensions = clone $this->dimensions;
        $this->coordinates = clone $this->coordinates;
        $this->children = [];
    }

    /**
     * Get element PDF instructions to use in content stream.
     *
     * @return string
     */
    public function getInstructions(): string
    {
        $style = $this->getStyle();
        $rules = $style->getRules();
        $graphicState = $this->style->getGraphicState();
        $graphicStateStr = '/' . $graphicState->getNumber() . ' gs';
        $font = $style->getFont();
        $fontStr = '/' . $font->getNumber() . ' ' . $font->getSize() . ' Tf';
        $coordinates = $this->getCoordinates();
        $pdfX = $coordinates->getPdfX();
        $pdfY = $coordinates->getPdfY();
        $baseLine = $style->getFont()->getDescender();
        $baseLineY = Math::sub($pdfY, $baseLine);
        $textWidth = $style->getFont()->getTextWidth($this->getText());
        $textHeight = $style->getFont()->getTextHeight();
        $textContent = $this->document->filterText($this->getText());
        $transform = $style->getTransformations($pdfX, $baseLineY);

        $element = [
            'q',
            $graphicStateStr,
            $transform,
            "{$rules['color'][0]} {$rules['color'][1]} {$rules['color'][2]} rg",
            'BT',
            $fontStr,
            "$textContent Tj",
            'ET',
            'Q',
        ];

        if ($this->drawTextOutline) {
            $element = array_merge($element, [
                'q',
                '1 w',
                '1 0 0 RG',
                "1 0 0 1 $pdfX $pdfY cm",
                "0 0 $textWidth $textHeight re",
                'S',
                'Q',
            ]);
        }

        return implode("\n", $element);
    }
}