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321 lines
9.9 KiB
321 lines
9.9 KiB
<?php |
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/** |
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* Handles actions related to GIS LINESTRING 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 count; |
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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 LINESTRING objects |
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*/ |
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class GisLineString extends GisGeometry |
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{ |
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/** @var self */ |
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private static $instance; |
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/** |
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* A private constructor; prevents direct creation of object. |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* Returns the singleton. |
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* |
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* @return GisLineString the singleton |
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*/ |
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public static function singleton() |
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{ |
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if (! isset(self::$instance)) { |
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self::$instance = new GisLineString(); |
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} |
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return self::$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 'LINESTRING(' and trailing ')' |
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$linestring = mb_substr($spatial, 11, -1); |
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return $this->setMinMax($linestring, []); |
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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 $line_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 $label, |
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$line_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($line_color, 1, 2)); |
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$green = (int) hexdec(mb_substr($line_color, 3, 2)); |
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$blue = (int) hexdec(mb_substr($line_color, 4, 2)); |
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$color = $image->colorAllocate($red, $green, $blue); |
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$label = trim($label ?? ''); |
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// Trim to remove leading 'LINESTRING(' and trailing ')' |
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$lineString = mb_substr($spatial, 11, -1); |
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$points_arr = $this->extractPoints($lineString, $scale_data); |
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foreach ($points_arr as $point) { |
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if (isset($temp_point)) { |
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// draw line section |
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$image->line( |
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(int) round($temp_point[0]), |
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(int) round($temp_point[1]), |
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(int) round($point[0]), |
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(int) round($point[1]), |
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$color |
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); |
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} |
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$temp_point = $point; |
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} |
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// print label if applicable |
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if ($label !== '') { |
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$image->string( |
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1, |
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(int) round($points_arr[1][0]), |
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(int) round($points_arr[1][1]), |
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$label, |
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$black |
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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 LINESTRING object |
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* @param string|null $label Label for the GIS LINESTRING object |
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* @param string $line_color Color for the GIS LINESTRING object |
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* @param array $scale_data Array containing data related to scaling |
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* @param TCPDF $pdf TCPDF instance |
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* |
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* @return TCPDF the modified TCPDF instance |
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*/ |
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public function prepareRowAsPdf($spatial, ?string $label, $line_color, array $scale_data, $pdf) |
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{ |
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// allocate colors |
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$red = hexdec(mb_substr($line_color, 1, 2)); |
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$green = hexdec(mb_substr($line_color, 3, 2)); |
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$blue = hexdec(mb_substr($line_color, 4, 2)); |
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$line = [ |
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'width' => 1.5, |
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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($label ?? ''); |
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// Trim to remove leading 'LINESTRING(' and trailing ')' |
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$linesrting = mb_substr($spatial, 11, -1); |
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$points_arr = $this->extractPoints($linesrting, $scale_data); |
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foreach ($points_arr as $point) { |
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if (isset($temp_point)) { |
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// draw line section |
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$pdf->Line($temp_point[0], $temp_point[1], $point[0], $point[1], $line); |
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} |
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$temp_point = $point; |
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} |
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// print label |
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if ($label !== '') { |
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$pdf->SetXY($points_arr[1][0], $points_arr[1][1]); |
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$pdf->SetFontSize(5); |
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$pdf->Cell(0, 0, $label); |
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} |
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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 LINESTRING object |
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* @param string $label Label for the GIS LINESTRING object |
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* @param string $line_color Color for the GIS LINESTRING 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, $line_color, array $scale_data) |
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{ |
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$line_options = [ |
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'name' => $label, |
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'id' => $label . $this->getRandomId(), |
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'class' => 'linestring vector', |
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'fill' => 'none', |
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'stroke' => $line_color, |
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'stroke-width' => 2, |
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]; |
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// Trim to remove leading 'LINESTRING(' and trailing ')' |
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$linesrting = mb_substr($spatial, 11, -1); |
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$points_arr = $this->extractPoints($linesrting, $scale_data); |
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$row = '<polyline points="'; |
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foreach ($points_arr as $point) { |
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$row .= $point[0] . ',' . $point[1] . ' '; |
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} |
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$row .= '"'; |
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foreach ($line_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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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 LINESTRING object |
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* @param int $srid Spatial reference ID |
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* @param string $label Label for the GIS LINESTRING object |
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* @param array $line_color Color for the GIS LINESTRING object |
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* @param array $scale_data Array containing data related to scaling |
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* |
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* @return string JavaScript related to a row in the GIS dataset |
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*/ |
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public function prepareRowAsOl($spatial, int $srid, $label, $line_color, array $scale_data) |
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{ |
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$stroke_style = [ |
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'color' => $line_color, |
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'width' => 2, |
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]; |
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$result = 'var style = new ol.style.Style({' |
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. 'stroke: new ol.style.Stroke(' . json_encode($stroke_style) . ')'; |
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if (trim($label) !== '') { |
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$text_style = ['text' => trim($label)]; |
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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, $scale_data); |
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// Trim to remove leading 'LINESTRING(' and trailing ')' |
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$linesrting = mb_substr($spatial, 11, -1); |
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$points_arr = $this->extractPoints($linesrting, null); |
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return $result . 'var line = new ol.Feature({geometry: ' |
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. $this->getLineForOpenLayers($points_arr, $srid) . '});' |
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. 'line.setStyle(style);' |
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. 'vectorLayer.addFeature(line);'; |
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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 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 $gis_data, $index, $empty = '') |
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{ |
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$no_of_points = $gis_data[$index]['LINESTRING']['no_of_points'] ?? 2; |
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if ($no_of_points < 2) { |
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$no_of_points = 2; |
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} |
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$wkt = 'LINESTRING('; |
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for ($i = 0; $i < $no_of_points; $i++) { |
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$wkt .= (isset($gis_data[$index]['LINESTRING'][$i]['x']) |
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&& trim((string) $gis_data[$index]['LINESTRING'][$i]['x']) != '' |
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? $gis_data[$index]['LINESTRING'][$i]['x'] : $empty) |
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. ' ' . (isset($gis_data[$index]['LINESTRING'][$i]['y']) |
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&& trim((string) $gis_data[$index]['LINESTRING'][$i]['y']) != '' |
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? $gis_data[$index]['LINESTRING'][$i]['y'] : $empty) . ','; |
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} |
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$wkt = mb_substr($wkt, 0, -1); |
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return $wkt . ')'; |
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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[$index]['gis_type'] = 'LINESTRING'; |
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$wkt = $value; |
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} |
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// Trim to remove leading 'LINESTRING(' and trailing ')' |
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$linestring = mb_substr($wkt, 11, -1); |
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$points_arr = $this->extractPoints($linestring, null); |
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$no_of_points = count($points_arr); |
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$params[$index]['LINESTRING']['no_of_points'] = $no_of_points; |
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for ($i = 0; $i < $no_of_points; $i++) { |
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$params[$index]['LINESTRING'][$i]['x'] = $points_arr[$i][0]; |
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$params[$index]['LINESTRING'][$i]['y'] = $points_arr[$i][1]; |
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} |
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return $params; |
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} |
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}
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