YetiForceCompany/YetiForcePDF

<?php

declare(strict_types=1);
/**
 * TextStream class.
 *
 * @package   YetiForcePDF\Objects\Basic
 *
 * @copyright YetiForce Sp. z o.o
 * @license   MIT
 * @author    Rafal Pospiech <r.pospiech@yetiforce.com>
 */

namespace YetiForcePDF\Objects;

/**
 * Class TextStream.
 */
class TextStream extends \YetiForcePDF\Objects\Basic\StreamObject
{
    /**
     * Object name.
     *
     * @var string
     */
    protected $name = 'TextStream';
    /**
     * Text stream.
     *
     * @var string
     */
    protected $text = '';
    /**
     * Font for text stream.
     *
     * @var \YetiForcePDF\Objects\Font
     */
    protected $font;
    /**
     * Font size.
     *
     * @var float
     */
    protected $fontSize = 10;
    /**
     * Text x position at current page.
     *
     * @var int
     */
    protected $x = 0;
    /**
     * Text y position at current page.
     *
     * @var int
     */
    protected $y = 0;

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

    /**
     * Set font.
     *
     * @param \YetiForcePDF\Objects\Font $font
     *
     * @return \YetiForcePDF\Objects\TextStream
     */
    public function setFont(Font $font): self
    {
        $this->font = $font;
        return $this;
    }

    /**
     * Set font size.
     *
     * @param float $fontSize
     *
     * @return \YetiForcePDF\Objects\TextStream
     */
    public function setFontSize(float $fontSize): self
    {
        $this->fontSize = $fontSize;
        return $this;
    }

    /**
     * Set text x position inside current page.
     *
     * @param float $x
     *
     * @return \YetiForcePDF\Objects\TextStream
     */
    public function setX(float $x): self
    {
        $this->x = $x;
        return $this;
    }

    /**
     * Set text x position inside current page.
     *
     * @param float $y
     *
     * @return \YetiForcePDF\Objects\TextStream
     */
    public function setY(float $y): self
    {
        $this->y = $y;
        return $this;
    }

    /**
     * Escape string.
     *
     * @param string $str
     *
     * @return string
     */
    public function escape(string $str): string
    {
        return strtr($str, [')' => '\\)', '(' => '\\(', '\\' => '\\\\', \chr(13) => '\r']);
    }

    /**
     * Get raw text stream.
     *
     * @return string
     */
    public function getRawStream(): string
    {
        return 'BT ' . $this->x . ' ' . $this->y . ' Td /' . $this->font->getNumber() . ' ' . $this->fontSize . ' Tf (' . $this->text . ') Tj ET';
    }

    /**
     * {@inheritdoc}
     */
    public function render(): string
    {
        $stream = $this->getRawStream();
        return implode("\n", [
            $this->getRawId() . ' obj',
            '<</Length ' . \strlen($stream) . '>>stream',
            $stream,
            'endstream',
            'endobj',
        ]);
    }
}