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<?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * Handles actions related to GIS MULTIPOLYGON objects * * @package PhpMyAdmin-GIS */ declare(strict_types=1); namespace PhpMyAdmin\Gis; use TCPDF; /** * Handles actions related to GIS MULTIPOLYGON objects * * @package PhpMyAdmin-GIS */ class GisMultiPolygon extends GisGeometry { // Hold the singleton instance of the class private static $_instance; /** * A private constructor; prevents direct creation of object. * * @access private */ private function __construct() { } /** * Returns the singleton. * * @return GisMultiPolygon the singleton * @access public */ public static function singleton() { if (! isset(self::$_instance)) { self::$_instance = new GisMultiPolygon(); } return self::$_instance; } /** * Scales each row. * * @param string $spatial spatial data of a row * * @return array an array containing the min, max values for x and y coordinates * @access public */ public function scaleRow($spatial) { $min_max = []; // Trim to remove leading 'MULTIPOLYGON(((' and trailing ')))' $multipolygon = mb_substr( $spatial, 15, mb_strlen($spatial) - 18 ); // Separate each polygon $polygons = explode(")),((", $multipolygon); foreach ($polygons as $polygon) { // If the polygon doesn't have an inner ring, use polygon itself if (mb_strpos($polygon, "),(") === false) { $ring = $polygon; } else { // Separate outer ring and use it to determine min-max $parts = explode("),(", $polygon); $ring = $parts[0]; } $min_max = $this->setMinMax($ring, $min_max); } return $min_max; } /** * Adds to the PNG image object, the data related to a row in the GIS dataset. * * @param string $spatial GIS POLYGON object * @param string|null $label Label for the GIS POLYGON object * @param string $fill_color Color for the GIS POLYGON object * @param array $scale_data Array containing data related to scaling * @param resource $image Image object * * @return resource the modified image object * @access public */ public function prepareRowAsPng( $spatial, ?string $label, $fill_color, array $scale_data, $image ) { // allocate colors $black = imagecolorallocate($image, 0, 0, 0); $red = hexdec(mb_substr($fill_color, 1, 2)); $green = hexdec(mb_substr($fill_color, 3, 2)); $blue = hexdec(mb_substr($fill_color, 4, 2)); $color = imagecolorallocate($image, $red, $green, $blue); // Trim to remove leading 'MULTIPOLYGON(((' and trailing ')))' $multipolygon = mb_substr( $spatial, 15, mb_strlen($spatial) - 18 ); // Separate each polygon $polygons = explode(")),((", $multipolygon); $first_poly = true; $points_arr = []; foreach ($polygons as $polygon) { // If the polygon doesn't have an inner polygon if (mb_strpos($polygon, "),(") === false) { $points_arr = $this->extractPoints($polygon, $scale_data, true); } else { // Separate outer and inner polygons $parts = explode("),(", $polygon); $outer = $parts[0]; $inner = array_slice($parts, 1); $points_arr = $this->extractPoints($outer, $scale_data, true); foreach ($inner as $inner_poly) { $points_arr = array_merge( $points_arr, $this->extractPoints($inner_poly, $scale_data, true) ); } } // draw polygon imagefilledpolygon($image, $points_arr, count($points_arr) / 2, $color); // mark label point if applicable if (isset($label) && trim($label) != '' && $first_poly) { $label_point = [ $points_arr[2], $points_arr[3], ]; } $first_poly = false; } // print label if applicable if (isset($label_point)) { imagestring( $image, 1, $points_arr[2], $points_arr[3], trim($label), $black ); } return $image; } /** * Adds to the TCPDF instance, the data related to a row in the GIS dataset. * * @param string $spatial GIS MULTIPOLYGON object * @param string|null $label Label for the GIS MULTIPOLYGON object * @param string $fill_color Color for the GIS MULTIPOLYGON object * @param array $scale_data Array containing data related to scaling * @param TCPDF $pdf TCPDF instance * * @return TCPDF the modified TCPDF instance * @access public */ public function prepareRowAsPdf($spatial, ?string $label, $fill_color, array $scale_data, $pdf) { // allocate colors $red = hexdec(mb_substr($fill_color, 1, 2)); $green = hexdec(mb_substr($fill_color, 3, 2)); $blue = hexdec(mb_substr($fill_color, 4, 2)); $color = [ $red, $green, $blue, ]; // Trim to remove leading 'MULTIPOLYGON(((' and trailing ')))' $multipolygon = mb_substr( $spatial, 15, mb_strlen($spatial) - 18 ); // Separate each polygon $polygons = explode(")),((", $multipolygon); $first_poly = true; foreach ($polygons as $polygon) { // If the polygon doesn't have an inner polygon if (mb_strpos($polygon, "),(") === false) { $points_arr = $this->extractPoints($polygon, $scale_data, true); } else { // Separate outer and inner polygons $parts = explode("),(", $polygon); $outer = $parts[0]; $inner = array_slice($parts, 1); $points_arr = $this->extractPoints($outer, $scale_data, true); foreach ($inner as $inner_poly) { $points_arr = array_merge( $points_arr, $this->extractPoints($inner_poly, $scale_data, true) ); } } // draw polygon $pdf->Polygon($points_arr, 'F*', [], $color, true); // mark label point if applicable if (isset($label) && trim($label) != '' && $first_poly) { $label_point = [ $points_arr[2], $points_arr[3], ]; } $first_poly = false; } // print label if applicable if (isset($label_point)) { $pdf->SetXY($label_point[0], $label_point[1]); $pdf->SetFontSize(5); $pdf->Cell(0, 0, trim($label)); } return $pdf; } /** * Prepares and returns the code related to a row in the GIS dataset as SVG. * * @param string $spatial GIS MULTIPOLYGON object * @param string $label Label for the GIS MULTIPOLYGON object * @param string $fill_color Color for the GIS MULTIPOLYGON object * @param array $scale_data Array containing data related to scaling * * @return string the code related to a row in the GIS dataset * @access public */ public function prepareRowAsSvg($spatial, $label, $fill_color, array $scale_data) { $polygon_options = [ 'name' => $label, 'class' => 'multipolygon vector', 'stroke' => 'black', 'stroke-width' => 0.5, 'fill' => $fill_color, 'fill-rule' => 'evenodd', 'fill-opacity' => 0.8, ]; $row = ''; // Trim to remove leading 'MULTIPOLYGON(((' and trailing ')))' $multipolygon = mb_substr( $spatial, 15, mb_strlen($spatial) - 18 ); // Separate each polygon $polygons = explode(")),((", $multipolygon); foreach ($polygons as $polygon) { $row .= '<path d="'; // If the polygon doesn't have an inner polygon if (mb_strpos($polygon, "),(") === false) { $row .= $this->_drawPath($polygon, $scale_data); } else { // Separate outer and inner polygons $parts = explode("),(", $polygon); $outer = $parts[0]; $inner = array_slice($parts, 1); $row .= $this->_drawPath($outer, $scale_data); foreach ($inner as $inner_poly) { $row .= $this->_drawPath($inner_poly, $scale_data); } } $polygon_options['id'] = $label . mt_rand(); $row .= '"'; foreach ($polygon_options as $option => $val) { $row .= ' ' . $option . '="' . trim((string) $val) . '"'; } $row .= '/>'; } return $row; } /** * Prepares JavaScript related to a row in the GIS dataset * to visualize it with OpenLayers. * * @param string $spatial GIS MULTIPOLYGON object * @param int $srid Spatial reference ID * @param string $label Label for the GIS MULTIPOLYGON object * @param string $fill_color Color for the GIS MULTIPOLYGON object * @param array $scale_data Array containing data related to scaling * * @return string JavaScript related to a row in the GIS dataset * @access public */ public function prepareRowAsOl($spatial, $srid, $label, $fill_color, array $scale_data) { $style_options = [ 'strokeColor' => '#000000', 'strokeWidth' => 0.5, 'fillColor' => $fill_color, 'fillOpacity' => 0.8, 'label' => $label, 'fontSize' => 10, ]; if ($srid == 0) { $srid = 4326; } $row = $this->getBoundsForOl($srid, $scale_data); // Trim to remove leading 'MULTIPOLYGON(((' and trailing ')))' $multipolygon = mb_substr( $spatial, 15, mb_strlen($spatial) - 18 ); // Separate each polygon $polygons = explode(")),((", $multipolygon); $row .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector(' . 'new OpenLayers.Geometry.MultiPolygon(' . $this->getPolygonArrayForOpenLayers($polygons, $srid) . '), null, ' . json_encode($style_options) . '));'; return $row; } /** * Draws a ring of the polygon using SVG path element. * * @param string $polygon The ring * @param array $scale_data Array containing data related to scaling * * @return string the code to draw the ring * @access private */ private function _drawPath($polygon, array $scale_data) { $points_arr = $this->extractPoints($polygon, $scale_data); $row = ' M ' . $points_arr[0][0] . ', ' . $points_arr[0][1]; $other_points = array_slice($points_arr, 1, count($points_arr) - 2); foreach ($other_points as $point) { $row .= ' L ' . $point[0] . ', ' . $point[1]; } $row .= ' Z '; return $row; } /** * Generate the WKT with the set of parameters passed by the GIS editor. * * @param array $gis_data GIS data * @param int $index Index into the parameter object * @param string $empty Value for empty points * * @return string WKT with the set of parameters passed by the GIS editor * @access public */ public function generateWkt(array $gis_data, $index, $empty = '') { $data_row = $gis_data[$index]['MULTIPOLYGON']; $no_of_polygons = isset($data_row['no_of_polygons']) ? $data_row['no_of_polygons'] : 1; if ($no_of_polygons < 1) { $no_of_polygons = 1; } $wkt = 'MULTIPOLYGON('; for ($k = 0; $k < $no_of_polygons; $k++) { $no_of_lines = isset($data_row[$k]['no_of_lines']) ? $data_row[$k]['no_of_lines'] : 1; if ($no_of_lines < 1) { $no_of_lines = 1; } $wkt .= '('; for ($i = 0; $i < $no_of_lines; $i++) { $no_of_points = isset($data_row[$k][$i]['no_of_points']) ? $data_row[$k][$i]['no_of_points'] : 4; if ($no_of_points < 4) { $no_of_points = 4; } $wkt .= '('; for ($j = 0; $j < $no_of_points; $j++) { $wkt .= ((isset($data_row[$k][$i][$j]['x']) && trim((string) $data_row[$k][$i][$j]['x']) != '') ? $data_row[$k][$i][$j]['x'] : $empty) . ' ' . ((isset($data_row[$k][$i][$j]['y']) && trim((string) $data_row[$k][$i][$j]['y']) != '') ? $data_row[$k][$i][$j]['y'] : $empty) . ','; } $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); $wkt .= '),'; } $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); $wkt .= '),'; } $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); $wkt .= ')'; return $wkt; } /** * Generate the WKT for the data from ESRI shape files. * * @param array $row_data GIS data * * @return string the WKT for the data from ESRI shape files * @access public */ public function getShape(array $row_data) { // Determines whether each line ring is an inner ring or an outer ring. // If it's an inner ring get a point on the surface which can be used to // correctly classify inner rings to their respective outer rings. foreach ($row_data['parts'] as $i => $ring) { $row_data['parts'][$i]['isOuter'] = GisPolygon::isOuterRing($ring['points']); } // Find points on surface for inner rings foreach ($row_data['parts'] as $i => $ring) { if (! $ring['isOuter']) { $row_data['parts'][$i]['pointOnSurface'] = GisPolygon::getPointOnSurface($ring['points']); } } // Classify inner rings to their respective outer rings. foreach ($row_data['parts'] as $j => $ring1) { if ($ring1['isOuter']) { continue; } foreach ($row_data['parts'] as $k => $ring2) { if (! $ring2['isOuter']) { continue; } // If the pointOnSurface of the inner ring // is also inside the outer ring if (GisPolygon::isPointInsidePolygon( $ring1['pointOnSurface'], $ring2['points'] ) ) { if (! isset($ring2['inner'])) { $row_data['parts'][$k]['inner'] = []; } $row_data['parts'][$k]['inner'][] = $j; } } } $wkt = 'MULTIPOLYGON('; // for each polygon foreach ($row_data['parts'] as $ring) { if (! $ring['isOuter']) { continue; } $wkt .= '('; // start of polygon $wkt .= '('; // start of outer ring foreach ($ring['points'] as $point) { $wkt .= $point['x'] . ' ' . $point['y'] . ','; } $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); $wkt .= ')'; // end of outer ring // inner rings if any if (isset($ring['inner'])) { foreach ($ring['inner'] as $j) { $wkt .= ',('; // start of inner ring foreach ($row_data['parts'][$j]['points'] as $innerPoint) { $wkt .= $innerPoint['x'] . ' ' . $innerPoint['y'] . ','; } $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); $wkt .= ')'; // end of inner ring } } $wkt .= '),'; // end of polygon } $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); $wkt .= ')'; // end of multipolygon return $wkt; } /** * Generate parameters for the GIS data editor from the value of the GIS column. * * @param string $value Value of the GIS column * @param int $index Index of the geometry * * @return array params for the GIS data editor from the value of the GIS column * @access public */ public function generateParams($value, $index = -1) { $params = []; if ($index == -1) { $index = 0; $data = GisGeometry::generateParams($value); $params['srid'] = $data['srid']; $wkt = $data['wkt']; } else { $params[$index]['gis_type'] = 'MULTIPOLYGON'; $wkt = $value; } // Trim to remove leading 'MULTIPOLYGON(((' and trailing ')))' $multipolygon = mb_substr( $wkt, 15, mb_strlen($wkt) - 18 ); // Separate each polygon $polygons = explode(")),((", $multipolygon); $param_row =& $params[$index]['MULTIPOLYGON']; $param_row['no_of_polygons'] = count($polygons); $k = 0; foreach ($polygons as $polygon) { // If the polygon doesn't have an inner polygon if (mb_strpos($polygon, "),(") === false) { $param_row[$k]['no_of_lines'] = 1; $points_arr = $this->extractPoints($polygon, null); $no_of_points = count($points_arr); $param_row[$k][0]['no_of_points'] = $no_of_points; for ($i = 0; $i < $no_of_points; $i++) { $param_row[$k][0][$i]['x'] = $points_arr[$i][0]; $param_row[$k][0][$i]['y'] = $points_arr[$i][1]; } } else { // Separate outer and inner polygons $parts = explode("),(", $polygon); $param_row[$k]['no_of_lines'] = count($parts); $j = 0; foreach ($parts as $ring) { $points_arr = $this->extractPoints($ring, null); $no_of_points = count($points_arr); $param_row[$k][$j]['no_of_points'] = $no_of_points; for ($i = 0; $i < $no_of_points; $i++) { $param_row[$k][$j][$i]['x'] = $points_arr[$i][0]; $param_row[$k][$j][$i]['y'] = $points_arr[$i][1]; } $j++; } } $k++; } return $params; } }