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This commit is contained in:
Chris Sewell
307
html/phpmyad/libraries/gis/pma_gis_geometrycollection.php
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307
html/phpmyad/libraries/gis/pma_gis_geometrycollection.php
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<?php
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/**
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* Handles the visualization of GIS GEOMETRYCOLLECTION objects.
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*
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* @package PhpMyAdmin-GIS
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*/
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class PMA_GIS_Geometrycollection extends PMA_GIS_Geometry
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{
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// Hold the singleton instance of the class
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private static $_instance;
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/**
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* A private constructor; prevents direct creation of object.
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*/
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private function __construct()
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{
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}
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/**
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* Returns the singleton.
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*
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* @return the singleton
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*/
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public static function singleton()
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{
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if (!isset(self::$_instance)) {
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$class = __CLASS__;
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self::$_instance = new $class;
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}
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return self::$_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 $spatial spatial data of a row
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*
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* @return array containing the min, max values for x and y cordinates
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*/
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public function scaleRow($spatial)
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{
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$min_max = array();
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// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
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$goem_col = substr($spatial, 19, (strlen($spatial) - 20));
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// Split the geometry collection object to get its constituents.
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$sub_parts = $this->_explodeGeomCol($goem_col);
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foreach ($sub_parts as $sub_part) {
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$type_pos = stripos($sub_part, '(');
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$type = substr($sub_part, 0, $type_pos);
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$scale_data = $gis_obj->scaleRow($sub_part);
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// Upadate minimum/maximum values for x and y cordinates.
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$c_maxX = (float) $scale_data['maxX'];
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if (! isset($min_max['maxX']) || $c_maxX > $min_max['maxX']) {
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$min_max['maxX'] = $c_maxX;
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}
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$c_minX = (float) $scale_data['minX'];
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if (! isset($min_max['minX']) || $c_minX < $min_max['minX']) {
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$min_max['minX'] = $c_minX;
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}
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$c_maxY = (float) $scale_data['maxY'];
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if (! isset($min_max['maxY']) || $c_maxY > $min_max['maxY']) {
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$min_max['maxY'] = $c_maxY;
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}
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$c_minY = (float) $scale_data['minY'];
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if (! isset($min_max['minY']) || $c_minY < $min_max['minY']) {
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$min_max['minY'] = $c_minY;
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}
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}
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return $min_max;
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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 GEOMETRYCOLLECTION object
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* @param string $label Label for the GIS GEOMETRYCOLLECTION object
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* @param string $color Color for the GIS GEOMETRYCOLLECTION object
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* @param array $scale_data Array containing data related to scaling
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* @param image $image Image object
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*
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* @return the modified image object
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*/
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public function prepareRowAsPng($spatial, $label, $color, $scale_data, $image)
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{
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// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
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$goem_col = substr($spatial, 19, (strlen($spatial) - 20));
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// Split the geometry collection object to get its constituents.
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$sub_parts = $this->_explodeGeomCol($goem_col);
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foreach ($sub_parts as $sub_part) {
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$type_pos = stripos($sub_part, '(');
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$type = substr($sub_part, 0, $type_pos);
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$image = $gis_obj->prepareRowAsPng($sub_part, $label, $color, $scale_data, $image);
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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 GEOMETRYCOLLECTION object
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* @param string $label Label for the GIS GEOMETRYCOLLECTION object
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* @param string $color Color for the GIS GEOMETRYCOLLECTION object
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* @param array $scale_data Array containing data related to scaling
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* @param image $pdf TCPDF instance
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*
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* @return the modified TCPDF instance
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*/
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public function prepareRowAsPdf($spatial, $label, $color, $scale_data, $pdf)
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{
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// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
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$goem_col = substr($spatial, 19, (strlen($spatial) - 20));
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// Split the geometry collection object to get its constituents.
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$sub_parts = $this->_explodeGeomCol($goem_col);
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foreach ($sub_parts as $sub_part) {
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$type_pos = stripos($sub_part, '(');
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$type = substr($sub_part, 0, $type_pos);
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$pdf = $gis_obj->prepareRowAsPdf($sub_part, $label, $color, $scale_data, $pdf);
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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 GEOMETRYCOLLECTION object
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* @param string $label Label for the GIS GEOMETRYCOLLECTION object
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* @param string $color Color for the GIS GEOMETRYCOLLECTION object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return the code related to a row in the GIS dataset
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*/
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public function prepareRowAsSvg($spatial, $label, $color, $scale_data)
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{
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$row = '';
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// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
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$goem_col = substr($spatial, 19, (strlen($spatial) - 20));
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// Split the geometry collection object to get its constituents.
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$sub_parts = $this->_explodeGeomCol($goem_col);
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foreach ($sub_parts as $sub_part) {
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$type_pos = stripos($sub_part, '(');
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$type = substr($sub_part, 0, $type_pos);
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$row .= $gis_obj->prepareRowAsSvg($sub_part, $label, $color, $scale_data);
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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 GEOMETRYCOLLECTION object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS GEOMETRYCOLLECTION object
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* @param string $color Color for the GIS GEOMETRYCOLLECTION object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return JavaScript related to a row in the GIS dataset
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*/
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public function prepareRowAsOl($spatial, $srid, $label, $color, $scale_data)
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{
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$row = '';
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// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
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$goem_col = substr($spatial, 19, (strlen($spatial) - 20));
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// Split the geometry collection object to get its constituents.
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$sub_parts = $this->_explodeGeomCol($goem_col);
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foreach ($sub_parts as $sub_part) {
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$type_pos = stripos($sub_part, '(');
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$type = substr($sub_part, 0, $type_pos);
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$row .= $gis_obj->prepareRowAsOl($sub_part, $srid, $label, $color, $scale_data);
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}
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return $row;
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}
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/**
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* Split the GEOMETRYCOLLECTION object and get its constituents.
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*
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* @param string $goem_col Geometry collection string
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*
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* @return the constituents of the geometry collection object
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*/
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private function _explodeGeomCol($goem_col)
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{
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$sub_parts = array();
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$br_count = 0;
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$start = 0;
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$count = 0;
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foreach (str_split($goem_col) as $char) {
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if ($char == '(') {
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$br_count++;
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} elseif ($char == ')') {
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$br_count--;
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if ($br_count == 0) {
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$sub_parts[] = substr($goem_col, $start, ($count + 1 - $start));
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$start = $count + 2;
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}
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}
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$count++;
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}
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return $sub_parts;
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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 $empty Value for empty points
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*
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* @return WKT with the set of parameters passed by the GIS editor
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*/
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public function generateWkt($gis_data, $index, $empty = '')
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{
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$geom_count = (isset($gis_data['GEOMETRYCOLLECTION']['geom_count']))
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? $gis_data['GEOMETRYCOLLECTION']['geom_count'] : 1;
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$wkt = 'GEOMETRYCOLLECTION(';
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for ($i = 0; $i < $geom_count; $i++) {
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if (isset($gis_data[$i]['gis_type'])) {
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$type = $gis_data[$i]['gis_type'];
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$wkt .= $gis_obj->generateWkt($gis_data, $i, $empty) . ',';
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}
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}
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if (isset($gis_data[0]['gis_type'])) {
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$wkt = substr($wkt, 0, strlen($wkt) - 1);
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}
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$wkt .= ')';
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return $wkt;
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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 index $index of the geometry
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*
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* @return parameters for the GIS data editor from the value of the GIS column
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*/
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public function generateParams($value)
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{
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$params = array();
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$data = PMA_GIS_Geometry::generateParams($value);
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$params['srid'] = $data['srid'];
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$wkt = $data['wkt'];
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// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
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$goem_col = substr($wkt, 19, (strlen($wkt) - 20));
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// Split the geometry collection object to get its constituents.
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$sub_parts = $this->_explodeGeomCol($goem_col);
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$params['GEOMETRYCOLLECTION']['geom_count'] = count($sub_parts);
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$i = 0;
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foreach ($sub_parts as $sub_part) {
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$type_pos = stripos($sub_part, '(');
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$type = substr($sub_part, 0, $type_pos);
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$gis_obj = PMA_GIS_Factory::factory($type);
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if (! $gis_obj) {
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continue;
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}
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$params = array_merge($params, $gis_obj->generateParams($sub_part, $i));
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$i++;
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}
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return $params;
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}
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}
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?>
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