diff options
Diffstat (limited to 'hugo/libraries/gis/pma_gis_geometrycollection.php')
| -rw-r--r-- | hugo/libraries/gis/pma_gis_geometrycollection.php | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/hugo/libraries/gis/pma_gis_geometrycollection.php b/hugo/libraries/gis/pma_gis_geometrycollection.php new file mode 100644 index 0000000..91c5a58 --- /dev/null +++ b/hugo/libraries/gis/pma_gis_geometrycollection.php @@ -0,0 +1,336 @@ +<?php +/* vim: set expandtab sw=4 ts=4 sts=4: */ +/** + * Handles actions related to GIS GEOMETRYCOLLECTION objects + * + * @package PhpMyAdmin-GIS + */ + +if (! defined('PHPMYADMIN')) { + exit; +} + +/** + * Handles actions related to GIS GEOMETRYCOLLECTION objects + * + * @package PhpMyAdmin-GIS + */ +class PMA_GIS_Geometrycollection extends PMA_GIS_Geometry +{ + // Hold the singleton instance of the class + private static $_instance; + + /** + * A private constructor; prevents direct creation of object. + * + * @access private + */ + private function __construct() + { + } + + /** + * Returns the singleton. + * + * @return the singleton + * @access public + */ + public static function singleton() + { + if (!isset(self::$_instance)) { + $class = __CLASS__; + self::$_instance = new $class; + } + + return self::$_instance; + } + + /** + * Scales each row. + * + * @param string $spatial spatial data of a row + * + * @return array array containing the min, max values for x and y cordinates + * @access public + */ + public function scaleRow($spatial) + { + $min_max = array(); + + // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' + $goem_col = substr($spatial, 19, (strlen($spatial) - 20)); + + // Split the geometry collection object to get its constituents. + $sub_parts = $this->_explodeGeomCol($goem_col); + + foreach ($sub_parts as $sub_part) { + $type_pos = stripos($sub_part, '('); + $type = substr($sub_part, 0, $type_pos); + + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $scale_data = $gis_obj->scaleRow($sub_part); + + // Upadate minimum/maximum values for x and y cordinates. + $c_maxX = (float) $scale_data['maxX']; + if (! isset($min_max['maxX']) || $c_maxX > $min_max['maxX']) { + $min_max['maxX'] = $c_maxX; + } + + $c_minX = (float) $scale_data['minX']; + if (! isset($min_max['minX']) || $c_minX < $min_max['minX']) { + $min_max['minX'] = $c_minX; + } + + $c_maxY = (float) $scale_data['maxY']; + if (! isset($min_max['maxY']) || $c_maxY > $min_max['maxY']) { + $min_max['maxY'] = $c_maxY; + } + + $c_minY = (float) $scale_data['minY']; + if (! isset($min_max['minY']) || $c_minY < $min_max['minY']) { + $min_max['minY'] = $c_minY; + } + } + return $min_max; + } + + /** + * Adds to the PNG image object, the data related to a row in the GIS dataset. + * + * @param string $spatial GIS GEOMETRYCOLLECTION object + * @param string $label label for the GIS GEOMETRYCOLLECTION object + * @param string $color color for the GIS GEOMETRYCOLLECTION object + * @param array $scale_data array containing data related to scaling + * @param object $image image object + * + * @return object the modified image object + * @access public + */ + public function prepareRowAsPng($spatial, $label, $color, $scale_data, $image) + { + // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' + $goem_col = substr($spatial, 19, (strlen($spatial) - 20)); + // Split the geometry collection object to get its constituents. + $sub_parts = $this->_explodeGeomCol($goem_col); + + foreach ($sub_parts as $sub_part) { + $type_pos = stripos($sub_part, '('); + $type = substr($sub_part, 0, $type_pos); + + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $image = $gis_obj->prepareRowAsPng( + $sub_part, $label, $color, $scale_data, $image + ); + } + return $image; + } + + /** + * Adds to the TCPDF instance, the data related to a row in the GIS dataset. + * + * @param string $spatial GIS GEOMETRYCOLLECTION object + * @param string $label label for the GIS GEOMETRYCOLLECTION object + * @param string $color color for the GIS GEOMETRYCOLLECTION object + * @param array $scale_data array containing data related to scaling + * @param object $pdf TCPDF instance + * + * @return object the modified TCPDF instance + * @access pubilc + */ + public function prepareRowAsPdf($spatial, $label, $color, $scale_data, $pdf) + { + // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' + $goem_col = substr($spatial, 19, (strlen($spatial) - 20)); + // Split the geometry collection object to get its constituents. + $sub_parts = $this->_explodeGeomCol($goem_col); + + foreach ($sub_parts as $sub_part) { + $type_pos = stripos($sub_part, '('); + $type = substr($sub_part, 0, $type_pos); + + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $pdf = $gis_obj->prepareRowAsPdf( + $sub_part, $label, $color, $scale_data, $pdf + ); + } + return $pdf; + } + + /** + * Prepares and returns the code related to a row in the GIS dataset as SVG. + * + * @param string $spatial GIS GEOMETRYCOLLECTION object + * @param string $label label for the GIS GEOMETRYCOLLECTION object + * @param string $color color for the GIS GEOMETRYCOLLECTION 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, $color, $scale_data) + { + $row = ''; + + // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' + $goem_col = substr($spatial, 19, (strlen($spatial) - 20)); + // Split the geometry collection object to get its constituents. + $sub_parts = $this->_explodeGeomCol($goem_col); + + foreach ($sub_parts as $sub_part) { + $type_pos = stripos($sub_part, '('); + $type = substr($sub_part, 0, $type_pos); + + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $row .= $gis_obj->prepareRowAsSvg( + $sub_part, $label, $color, $scale_data + ); + } + return $row; + } + + /** + * Prepares JavaScript related to a row in the GIS dataset + * to visualize it with OpenLayers. + * + * @param string $spatial GIS GEOMETRYCOLLECTION object + * @param int $srid spatial reference ID + * @param string $label label for the GIS GEOMETRYCOLLECTION object + * @param string $color color for the GIS GEOMETRYCOLLECTION 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, $color, $scale_data) + { + $row = ''; + + // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' + $goem_col = substr($spatial, 19, (strlen($spatial) - 20)); + // Split the geometry collection object to get its constituents. + $sub_parts = $this->_explodeGeomCol($goem_col); + + foreach ($sub_parts as $sub_part) { + $type_pos = stripos($sub_part, '('); + $type = substr($sub_part, 0, $type_pos); + + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $row .= $gis_obj->prepareRowAsOl( + $sub_part, $srid, $label, $color, $scale_data + ); + } + return $row; + } + + /** + * Splits the GEOMETRYCOLLECTION object and get its constituents. + * + * @param string $goem_col geometry collection string + * + * @return array the constituents of the geometry collection object + * @access private + */ + private function _explodeGeomCol($goem_col) + { + $sub_parts = array(); + $br_count = 0; + $start = 0; + $count = 0; + foreach (str_split($goem_col) as $char) { + if ($char == '(') { + $br_count++; + } elseif ($char == ')') { + $br_count--; + if ($br_count == 0) { + $sub_parts[] = substr($goem_col, $start, ($count + 1 - $start)); + $start = $count + 2; + } + } + $count++; + } + return $sub_parts; + } + + /** + * Generates 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 $empty value for empty points + * + * @return string WKT with the set of parameters passed by the GIS editor + * @access public + */ + public function generateWkt($gis_data, $index, $empty = '') + { + $geom_count = (isset($gis_data['GEOMETRYCOLLECTION']['geom_count'])) + ? $gis_data['GEOMETRYCOLLECTION']['geom_count'] : 1; + $wkt = 'GEOMETRYCOLLECTION('; + for ($i = 0; $i < $geom_count; $i++) { + if (isset($gis_data[$i]['gis_type'])) { + $type = $gis_data[$i]['gis_type']; + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $wkt .= $gis_obj->generateWkt($gis_data, $i, $empty) . ','; + } + } + if (isset($gis_data[0]['gis_type'])) { + $wkt = substr($wkt, 0, strlen($wkt) - 1); + } + $wkt .= ')'; + return $wkt; + } + + /** + * Generates parameters for the GIS data editor from the value of the GIS column. + * + * @param string $value of the GIS column + * + * @return array parameters for the GIS editor from the value of the GIS column + * @access public + */ + public function generateParams($value) + { + $params = array(); + $data = PMA_GIS_Geometry::generateParams($value); + $params['srid'] = $data['srid']; + $wkt = $data['wkt']; + + // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' + $goem_col = substr($wkt, 19, (strlen($wkt) - 20)); + // Split the geometry collection object to get its constituents. + $sub_parts = $this->_explodeGeomCol($goem_col); + $params['GEOMETRYCOLLECTION']['geom_count'] = count($sub_parts); + + $i = 0; + foreach ($sub_parts as $sub_part) { + $type_pos = stripos($sub_part, '('); + $type = substr($sub_part, 0, $type_pos); + $gis_obj = PMA_GIS_Factory::factory($type); + if (! $gis_obj) { + continue; + } + $params = array_merge($params, $gis_obj->generateParams($sub_part, $i)); + $i++; + } + return $params; + } +} +?> |