87 Zeilen
2.1 KiB
PHP
87 Zeilen
2.1 KiB
PHP
<?php
|
|
declare(strict_types = 1);
|
|
|
|
namespace BaconQrCode\Renderer;
|
|
|
|
use BaconQrCode\Encoder\QrCode;
|
|
use BaconQrCode\Exception\InvalidArgumentException;
|
|
|
|
final class PlainTextRenderer implements RendererInterface
|
|
{
|
|
/**
|
|
* UTF-8 full block (U+2588)
|
|
*/
|
|
private const FULL_BLOCK = "\xe2\x96\x88";
|
|
|
|
/**
|
|
* UTF-8 upper half block (U+2580)
|
|
*/
|
|
private const UPPER_HALF_BLOCK = "\xe2\x96\x80";
|
|
|
|
/**
|
|
* UTF-8 lower half block (U+2584)
|
|
*/
|
|
private const LOWER_HALF_BLOCK = "\xe2\x96\x84";
|
|
|
|
/**
|
|
* UTF-8 no-break space (U+00A0)
|
|
*/
|
|
private const EMPTY_BLOCK = "\xc2\xa0";
|
|
|
|
/**
|
|
* @var int
|
|
*/
|
|
private $margin;
|
|
|
|
public function __construct(int $margin = 2)
|
|
{
|
|
$this->margin = $margin;
|
|
}
|
|
|
|
/**
|
|
* @throws InvalidArgumentException if matrix width doesn't match height
|
|
*/
|
|
public function render(QrCode $qrCode) : string
|
|
{
|
|
$matrix = $qrCode->getMatrix();
|
|
$matrixSize = $matrix->getWidth();
|
|
|
|
if ($matrixSize !== $matrix->getHeight()) {
|
|
throw new InvalidArgumentException('Matrix must have the same width and height');
|
|
}
|
|
|
|
$rows = $matrix->getArray()->toArray();
|
|
|
|
if (0 !== $matrixSize % 2) {
|
|
$rows[] = array_fill(0, $matrixSize, 0);
|
|
}
|
|
|
|
$horizontalMargin = str_repeat(self::EMPTY_BLOCK, $this->margin);
|
|
$result = str_repeat("\n", (int) ceil($this->margin / 2));
|
|
|
|
for ($i = 0; $i < $matrixSize; $i += 2) {
|
|
$result .= $horizontalMargin;
|
|
|
|
$upperRow = $rows[$i];
|
|
$lowerRow = $rows[$i + 1];
|
|
|
|
for ($j = 0; $j < $matrixSize; ++$j) {
|
|
$upperBit = $upperRow[$j];
|
|
$lowerBit = $lowerRow[$j];
|
|
|
|
if ($upperBit) {
|
|
$result .= $lowerBit ? self::FULL_BLOCK : self::UPPER_HALF_BLOCK;
|
|
} else {
|
|
$result .= $lowerBit ? self::LOWER_HALF_BLOCK : self::EMPTY_BLOCK;
|
|
}
|
|
}
|
|
|
|
$result .= $horizontalMargin . "\n";
|
|
}
|
|
|
|
$result .= str_repeat("\n", (int) ceil($this->margin / 2));
|
|
|
|
return $result;
|
|
}
|
|
}
|