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336 lines
10 KiB
336 lines
10 KiB
<?php |
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/** |
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* Handles actions related to GIS POINT 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\Image\ImageWrapper; |
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use TCPDF; |
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use function hexdec; |
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use function json_encode; |
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use function mb_substr; |
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use function round; |
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use function trim; |
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/** |
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* Handles actions related to GIS POINT objects |
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*/ |
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class GisPoint extends GisGeometry |
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{ |
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/** @var self */ |
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private static $instance; |
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/** |
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* A private constructor; prevents direct creation of object. |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* Returns the singleton. |
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* |
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* @return GisPoint the singleton |
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*/ |
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public static function singleton() |
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{ |
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if (! isset(self::$instance)) { |
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self::$instance = new GisPoint(); |
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} |
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return self::$instance; |
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} |
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/** |
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* Scales each row. |
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* |
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* @param string $spatial spatial data of a row |
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* |
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* @return array an array containing the min, max values for x and y coordinates |
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*/ |
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public function scaleRow($spatial) |
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{ |
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// Trim to remove leading 'POINT(' and trailing ')' |
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$point = mb_substr($spatial, 6, -1); |
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return $this->setMinMax($point, []); |
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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|null $label Label for the GIS POLYGON object |
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* @param string $point_color Color for the GIS POLYGON object |
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* @param array $scale_data Array containing data related to scaling |
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*/ |
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public function prepareRowAsPng( |
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$spatial, |
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?string $label, |
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$point_color, |
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array $scale_data, |
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ImageWrapper $image |
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): ImageWrapper { |
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// allocate colors |
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$black = $image->colorAllocate(0, 0, 0); |
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$red = (int) hexdec(mb_substr($point_color, 1, 2)); |
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$green = (int) hexdec(mb_substr($point_color, 3, 2)); |
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$blue = (int) hexdec(mb_substr($point_color, 4, 2)); |
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$color = $image->colorAllocate($red, $green, $blue); |
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$label = trim($label ?? ''); |
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// Trim to remove leading 'POINT(' and trailing ')' |
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$point = mb_substr($spatial, 6, -1); |
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$points_arr = $this->extractPoints($point, $scale_data); |
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// draw a small circle to mark the point |
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') { |
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$image->arc( |
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(int) round($points_arr[0][0]), |
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(int) round($points_arr[0][1]), |
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7, |
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7, |
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0, |
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360, |
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$color |
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); |
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// print label if applicable |
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if ($label !== '') { |
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$image->string( |
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1, |
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(int) round($points_arr[0][0]), |
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(int) round($points_arr[0][1]), |
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$label, |
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$black |
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); |
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} |
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} |
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return $image; |
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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 POINT object |
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* @param string|null $label Label for the GIS POINT object |
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* @param string $point_color Color for the GIS POINT object |
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* @param array $scale_data Array containing data related to scaling |
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* @param TCPDF $pdf TCPDF instance |
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* |
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* @return TCPDF the modified TCPDF instance |
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*/ |
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public function prepareRowAsPdf( |
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$spatial, |
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?string $label, |
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$point_color, |
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array $scale_data, |
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$pdf |
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) { |
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// allocate colors |
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$red = hexdec(mb_substr($point_color, 1, 2)); |
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$green = hexdec(mb_substr($point_color, 3, 2)); |
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$blue = hexdec(mb_substr($point_color, 4, 2)); |
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$line = [ |
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'width' => 1.25, |
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'color' => [ |
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$red, |
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$green, |
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$blue, |
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], |
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]; |
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$label = trim($label ?? ''); |
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// Trim to remove leading 'POINT(' and trailing ')' |
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$point = mb_substr($spatial, 6, -1); |
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$points_arr = $this->extractPoints($point, $scale_data); |
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// draw a small circle to mark the point |
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') { |
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$pdf->Circle($points_arr[0][0], $points_arr[0][1], 2, 0, 360, 'D', $line); |
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// print label if applicable |
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if ($label !== '') { |
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$pdf->SetXY($points_arr[0][0], $points_arr[0][1]); |
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$pdf->SetFontSize(5); |
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$pdf->Cell(0, 0, $label); |
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} |
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} |
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return $pdf; |
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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 POINT object |
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* @param string $label Label for the GIS POINT object |
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* @param string $point_color Color for the GIS POINT object |
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* @param array $scale_data Array containing data related to scaling |
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* |
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* @return string the code related to a row in the GIS dataset |
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*/ |
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public function prepareRowAsSvg($spatial, $label, $point_color, array $scale_data) |
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{ |
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$point_options = [ |
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'name' => $label, |
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'id' => $label . $this->getRandomId(), |
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'class' => 'point vector', |
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'fill' => 'white', |
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'stroke' => $point_color, |
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'stroke-width' => 2, |
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]; |
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// Trim to remove leading 'POINT(' and trailing ')' |
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$point = mb_substr($spatial, 6, -1); |
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$points_arr = $this->extractPoints($point, $scale_data); |
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$row = ''; |
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if (((float) $points_arr[0][0]) !== 0.0 && ((float) $points_arr[0][1]) !== 0.0) { |
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$row .= '<circle cx="' . $points_arr[0][0] |
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. '" cy="' . $points_arr[0][1] . '" r="3"'; |
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foreach ($point_options as $option => $val) { |
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$row .= ' ' . $option . '="' . trim((string) $val) . '"'; |
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} |
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$row .= '/>'; |
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} |
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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 POINT object |
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* @param int $srid Spatial reference ID |
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* @param string $label Label for the GIS POINT object |
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* @param array $point_color Color for the GIS POINT object |
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* @param array $scale_data Array containing data related to scaling |
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* |
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* @return string JavaScript related to a row in the GIS dataset |
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*/ |
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public function prepareRowAsOl( |
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$spatial, |
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int $srid, |
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$label, |
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$point_color, |
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array $scale_data |
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) { |
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$fill_style = ['color' => 'white']; |
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$stroke_style = [ |
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'color' => $point_color, |
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'width' => 2, |
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]; |
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$result = 'var fill = new ol.style.Fill(' . json_encode($fill_style) . ');' |
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. 'var stroke = new ol.style.Stroke(' . json_encode($stroke_style) . ');' |
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. 'var style = new ol.style.Style({' |
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. 'image: new ol.style.Circle({' |
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. 'fill: fill,' |
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. 'stroke: stroke,' |
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. 'radius: 3' |
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. '}),' |
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. 'fill: fill,' |
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. 'stroke: stroke'; |
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if (trim($label) !== '') { |
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$text_style = [ |
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'text' => trim($label), |
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'offsetY' => -9, |
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]; |
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$result .= ',text: new ol.style.Text(' . json_encode($text_style) . ')'; |
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} |
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$result .= '});'; |
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if ($srid === 0) { |
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$srid = 4326; |
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} |
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$result .= $this->getBoundsForOl($srid, $scale_data); |
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// Trim to remove leading 'POINT(' and trailing ')' |
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$point = mb_substr($spatial, 6, -1); |
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$points_arr = $this->extractPoints($point, null); |
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') { |
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$result .= 'var point = new ol.Feature({geometry: ' |
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. $this->getPointForOpenLayers($points_arr[0], $srid) . '});' |
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. 'point.setStyle(style);' |
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. 'vectorLayer.addFeature(point);'; |
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} |
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return $result; |
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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 array $gis_data GIS data |
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* @param int $index Index into the parameter object |
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* @param string|null $empty Point does not adhere to this parameter |
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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 $gis_data, $index, $empty = '') |
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{ |
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return 'POINT(' |
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. (isset($gis_data[$index]['POINT']['x']) |
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&& trim((string) $gis_data[$index]['POINT']['x']) != '' |
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? $gis_data[$index]['POINT']['x'] : '') |
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. ' ' |
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. (isset($gis_data[$index]['POINT']['y']) |
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&& trim((string) $gis_data[$index]['POINT']['y']) != '' |
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? $gis_data[$index]['POINT']['y'] : '') . ')'; |
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} |
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/** |
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* Generate the WKT for the data from ESRI shape files. |
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* |
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* @param array $row_data GIS data |
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* |
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* @return string the WKT for the data from ESRI shape files |
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*/ |
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public function getShape(array $row_data) |
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{ |
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return 'POINT(' . ($row_data['x'] ?? '') |
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. ' ' . ($row_data['y'] ?? '') . ')'; |
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} |
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/** |
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* Generate parameters for the GIS data editor from the value of the GIS column. |
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* |
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* @param string $value of the GIS column |
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* @param int $index of the geometry |
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* |
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* @return array params for the GIS data editor from the value of the GIS column |
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*/ |
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public function generateParams($value, $index = -1) |
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{ |
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$params = []; |
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if ($index == -1) { |
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$index = 0; |
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$data = GisGeometry::generateParams($value); |
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$params['srid'] = $data['srid']; |
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$wkt = $data['wkt']; |
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} else { |
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$params[$index]['gis_type'] = 'POINT'; |
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$wkt = $value; |
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} |
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// Trim to remove leading 'POINT(' and trailing ')' |
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$point = mb_substr($wkt, 6, -1); |
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$points_arr = $this->extractPoints($point, null); |
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$params[$index]['POINT']['x'] = $points_arr[0][0]; |
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$params[$index]['POINT']['y'] = $points_arr[0][1]; |
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return $params; |
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} |
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}
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