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<?php |
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/** |
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* Handles actions related to GIS POLYGON objects |
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*/ |
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declare(strict_types=1); |
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namespace PhpMyAdmin\Gis; |
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use PhpMyAdmin\Gis\Ds\Extent; |
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use PhpMyAdmin\Gis\Ds\ScaleData; |
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use PhpMyAdmin\Image\ImageWrapper; |
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use TCPDF; |
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use function array_merge; |
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use function array_slice; |
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use function count; |
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use function explode; |
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use function implode; |
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use function json_encode; |
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use function max; |
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use function mb_substr; |
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use function round; |
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use function sprintf; |
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/** |
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* Handles actions related to GIS POLYGON objects |
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*/ |
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class GisPolygon extends GisGeometry |
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{ |
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private static self $instance; |
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/** |
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* A private constructor; prevents direct creation of object. |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* Returns the singleton. |
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* |
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* @return GisPolygon the singleton |
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*/ |
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public static function singleton(): GisPolygon |
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{ |
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if (! isset(self::$instance)) { |
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self::$instance = new GisPolygon(); |
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} |
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return self::$instance; |
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} |
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/** |
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* Get coordinate extent for this wkt. |
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* |
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* @param string $wkt Well Known Text represenatation of the geometry |
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* |
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* @return Extent the min, max values for x and y coordinates |
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*/ |
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public function getExtent(string $wkt): Extent |
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{ |
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// Trim to remove leading 'POLYGON((' and trailing '))' |
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$polygon = mb_substr($wkt, 9, -2); |
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$wktOuterRing = explode('),(', $polygon)[0]; |
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return $this->getCoordinatesExtent($wktOuterRing); |
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} |
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/** |
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* Adds to the PNG image object, the data related to a row in the GIS dataset. |
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* |
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* @param string $spatial GIS POLYGON object |
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* @param string $label Label for the GIS POLYGON object |
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* @param int[] $color Color for the GIS POLYGON object |
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* @param ScaleData $scaleData Array containing data related to scaling |
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*/ |
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public function prepareRowAsPng( |
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string $spatial, |
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string $label, |
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array $color, |
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ScaleData $scaleData, |
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ImageWrapper $image, |
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): void { |
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// allocate colors |
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$black = $image->colorAllocate(0, 0, 0); |
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$fillColor = $image->colorAllocate(...$color); |
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// Trim to remove leading 'POLYGON((' and trailing '))' |
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$polygon = mb_substr($spatial, 9, -2); |
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$pointsArr = []; |
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$wktRings = explode('),(', $polygon); |
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foreach ($wktRings as $wktRing) { |
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$ring = $this->extractPoints1dLinear($wktRing, $scaleData); |
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$pointsArr = array_merge($pointsArr, $ring); |
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} |
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// draw polygon |
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$image->filledPolygon($pointsArr, $fillColor); |
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if ($label === '') { |
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return; |
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} |
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// print label if applicable |
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$image->string( |
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1, |
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(int) round($pointsArr[2]), |
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(int) round($pointsArr[3]), |
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$label, |
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$black, |
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); |
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} |
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/** |
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* Adds to the TCPDF instance, the data related to a row in the GIS dataset. |
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* |
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* @param string $spatial GIS POLYGON object |
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* @param string $label Label for the GIS POLYGON object |
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* @param int[] $color Color for the GIS POLYGON object |
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* @param ScaleData $scaleData Array containing data related to scaling |
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*/ |
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public function prepareRowAsPdf( |
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string $spatial, |
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string $label, |
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array $color, |
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ScaleData $scaleData, |
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TCPDF $pdf, |
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): void { |
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// Trim to remove leading 'POLYGON((' and trailing '))' |
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$polygon = mb_substr($spatial, 9, -2); |
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$wktRings = explode('),(', $polygon); |
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$pointsArr = []; |
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foreach ($wktRings as $wktRing) { |
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$ring = $this->extractPoints1dLinear($wktRing, $scaleData); |
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$pointsArr = array_merge($pointsArr, $ring); |
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} |
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// draw polygon |
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$pdf->Polygon($pointsArr, 'F*', [], $color); |
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if ($label === '') { |
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return; |
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} |
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// print label if applicable |
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$pdf->setXY($pointsArr[2], $pointsArr[3]); |
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$pdf->setFontSize(5); |
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$pdf->Cell(0, 0, $label); |
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} |
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/** |
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* Prepares and returns the code related to a row in the GIS dataset as SVG. |
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* |
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* @param string $spatial GIS POLYGON object |
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* @param string $label Label for the GIS POLYGON object |
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* @param int[] $color Color for the GIS POLYGON object |
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* @param ScaleData $scaleData Array containing data related to scaling |
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* |
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* @return string the code related to a row in the GIS dataset |
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*/ |
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public function prepareRowAsSvg(string $spatial, string $label, array $color, ScaleData $scaleData): string |
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{ |
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$polygonOptions = [ |
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'name' => $label, |
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'id' => $label . $this->getRandomId(), |
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'class' => 'polygon vector', |
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'stroke' => 'black', |
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'stroke-width' => 0.5, |
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'fill' => sprintf('#%02x%02x%02x', ...$color), |
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'fill-rule' => 'evenodd', |
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'fill-opacity' => 0.8, |
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]; |
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// Trim to remove leading 'POLYGON((' and trailing '))' |
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$polygon = mb_substr($spatial, 9, -2); |
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$row = '<path d="'; |
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$wktRings = explode('),(', $polygon); |
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foreach ($wktRings as $wktRing) { |
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$row .= $this->drawPath($wktRing, $scaleData); |
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} |
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$row .= '"'; |
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foreach ($polygonOptions as $option => $val) { |
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$row .= ' ' . $option . '="' . $val . '"'; |
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} |
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$row .= '/>'; |
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return $row; |
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} |
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/** |
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* Prepares JavaScript related to a row in the GIS dataset |
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* to visualize it with OpenLayers. |
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* |
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* @param string $spatial GIS POLYGON object |
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* @param int $srid Spatial reference ID |
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* @param string $label Label for the GIS POLYGON object |
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* @param int[] $color Color for the GIS POLYGON object |
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* |
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* @return string JavaScript related to a row in the GIS dataset |
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*/ |
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public function prepareRowAsOl(string $spatial, int $srid, string $label, array $color): string |
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{ |
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$color[] = 0.8; |
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$fillStyle = ['color' => $color]; |
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$strokeStyle = ['color' => [0, 0, 0], 'width' => 0.5]; |
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$style = 'new ol.style.Style({' |
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. 'fill: new ol.style.Fill(' . json_encode($fillStyle) . '),' |
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. 'stroke: new ol.style.Stroke(' . json_encode($strokeStyle) . ')'; |
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if ($label !== '') { |
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$textStyle = ['text' => $label]; |
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$style .= ',text: new ol.style.Text(' . json_encode($textStyle) . ')'; |
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} |
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$style .= '})'; |
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// Trim to remove leading 'POLYGON((' and trailing '))' |
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$wktCoordinates = mb_substr($spatial, 9, -2); |
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$olGeometry = $this->toOpenLayersObject( |
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'ol.geom.Polygon', |
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$this->extractPoints2d($wktCoordinates, null), |
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$srid, |
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); |
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return $this->addGeometryToLayer($olGeometry, $style); |
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} |
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/** |
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* Draws a ring of the polygon using SVG path element. |
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* |
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* @param string $polygon The ring |
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* @param ScaleData $scaleData Array containing data related to scaling |
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* |
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* @return string the code to draw the ring |
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*/ |
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private function drawPath(string $polygon, ScaleData $scaleData): string |
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{ |
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$pointsArr = $this->extractPoints1d($polygon, $scaleData); |
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$row = ' M ' . $pointsArr[0][0] . ', ' . $pointsArr[0][1]; |
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$otherPoints = array_slice($pointsArr, 1, count($pointsArr) - 2); |
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foreach ($otherPoints as $point) { |
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$row .= ' L ' . $point[0] . ', ' . $point[1]; |
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} |
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$row .= ' Z '; |
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return $row; |
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} |
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/** |
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* Generate the WKT with the set of parameters passed by the GIS editor. |
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* |
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* @param mixed[] $gisData GIS data |
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* @param int $index Index into the parameter object |
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* @param string $empty Value for empty points |
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* |
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* @return string WKT with the set of parameters passed by the GIS editor |
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*/ |
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public function generateWkt(array $gisData, int $index, string $empty = ''): string |
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{ |
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$dataRow = $gisData[$index]['POLYGON'] ?? null; |
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$noOfLines = max(1, $dataRow['data_length'] ?? 0); |
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$wktRings = []; |
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/** @infection-ignore-all */ |
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for ($i = 0; $i < $noOfLines; $i++) { |
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$noOfPoints = max(4, $dataRow[$i]['data_length'] ?? 0); |
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$wktPoints = []; |
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for ($j = 0; $j < $noOfPoints; $j++) { |
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$wktPoints[] = $this->getWktCoord($dataRow[$i][$j] ?? null, $empty); |
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} |
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$wktRings[] = '(' . implode(',', $wktPoints) . ')'; |
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} |
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return 'POLYGON(' . implode(',', $wktRings) . ')'; |
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} |
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/** |
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* Generate coordinate parameters for the GIS data editor from the value of the GIS column. |
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* |
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* @param string $wkt Value of the GIS column |
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* |
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* @return mixed[] Coordinate params for the GIS data editor from the value of the GIS column |
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*/ |
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protected function getCoordinateParams(string $wkt): array |
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{ |
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// Trim to remove leading 'POLYGON((' and trailing '))' |
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$wktPolygon = mb_substr($wkt, 9, -2); |
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$wktRings = explode('),(', $wktPolygon); |
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$coords = ['data_length' => count($wktRings)]; |
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foreach ($wktRings as $j => $wktRing) { |
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$points = $this->extractPoints1d($wktRing, null); |
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$noOfPoints = count($points); |
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$coords[$j] = ['data_length' => $noOfPoints]; |
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/** @infection-ignore-all */ |
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for ($i = 0; $i < $noOfPoints; $i++) { |
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$coords[$j][$i] = ['x' => $points[$i][0], 'y' => $points[$i][1]]; |
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} |
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} |
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return $coords; |
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} |
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protected function getType(): string |
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{ |
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return 'POLYGON'; |
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} |
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} |
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