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#pma/libraries/gis/GISGeometry.php
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399
#pma/libraries/gis/GISGeometry.php
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<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Base class for all GIS data type classes
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*
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* @package PhpMyAdmin-GIS
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*/
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namespace PMA\libraries\gis;
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use \TCPDF;
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/**
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* Base class for all GIS data type classes.
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*
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* @package PhpMyAdmin-GIS
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*/
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abstract class GISGeometry
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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 data object
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* @param string $label label for the GIS data object
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* @param string $color color for the GIS data object
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* @param array $scale_data data related to scaling
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*
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* @return string the code related to a row in the GIS dataset
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* @access public
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*/
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public abstract function prepareRowAsSvg($spatial, $label, $color, $scale_data);
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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 data object
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* @param string $label label for the GIS data object
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* @param string $color color for the GIS data object
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* @param array $scale_data array containing data related to scaling
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* @param object $image image object
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*
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* @return object the modified image object
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* @access public
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*/
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public abstract function prepareRowAsPng(
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$spatial,
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$label,
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$color,
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$scale_data,
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$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 data object
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* @param string $label label for the GIS data object
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* @param string $color color for the GIS data object
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* @param array $scale_data array containing data related to scaling
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* @param TCPDF $pdf TCPDF instance
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*
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* @return TCPDF the modified TCPDF instance
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* @access public
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*/
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public abstract function prepareRowAsPdf(
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$spatial,
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$label,
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$color,
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$scale_data,
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$pdf
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);
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/**
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* Prepares the 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 data object
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* @param int $srid spatial reference ID
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* @param string $label label for the GIS data object
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* @param string $color color for the GIS data object
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* @param array $scale_data array containing data related to scaling
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*
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* @return string the JavaScript related to a row in the GIS dataset
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* @access public
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*/
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public abstract function prepareRowAsOl(
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$spatial,
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$srid,
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$label,
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$color,
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$scale_data
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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 $spatial spatial data of a row
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*
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* @return array array containing the min, max values for x and y coordinates
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* @access public
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*/
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public abstract function scaleRow($spatial);
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/**
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* Generates 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 $empty value for empty points
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*
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* @return string WKT with the set of parameters passed by the GIS editor
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* @access public
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*/
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public abstract function generateWkt($gis_data, $index, $empty = '');
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/**
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* Returns OpenLayers.Bounds object that correspond to the bounds of GIS data.
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*
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* @param string $srid spatial reference ID
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* @param array $scale_data data related to scaling
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*
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* @return string OpenLayers.Bounds object that
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* correspond to the bounds of GIS data
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* @access protected
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*/
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protected function getBoundsForOl($srid, $scale_data)
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{
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return 'bound = new OpenLayers.Bounds(); '
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. 'bound.extend(new OpenLayers.LonLat('
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. $scale_data['minX'] . ', ' . $scale_data['minY']
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. ').transform(new OpenLayers.Projection("EPSG:'
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. intval($srid) . '"), map.getProjectionObject())); '
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. 'bound.extend(new OpenLayers.LonLat('
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. $scale_data['maxX'] . ', ' . $scale_data['maxY']
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. ').transform(new OpenLayers.Projection("EPSG:'
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. intval($srid) . '"), map.getProjectionObject()));';
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}
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/**
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* Updates the min, max values with the given point set.
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*
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* @param string $point_set point set
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* @param array $min_max existing min, max values
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*
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* @return array the updated min, max values
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* @access protected
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*/
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protected function setMinMax($point_set, $min_max)
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{
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// Separate each point
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$points = explode(",", $point_set);
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foreach ($points as $point) {
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// Extract coordinates of the point
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$cordinates = explode(" ", $point);
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$x = (float)$cordinates[0];
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if (!isset($min_max['maxX']) || $x > $min_max['maxX']) {
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$min_max['maxX'] = $x;
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}
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if (!isset($min_max['minX']) || $x < $min_max['minX']) {
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$min_max['minX'] = $x;
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}
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$y = (float)$cordinates[1];
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if (!isset($min_max['maxY']) || $y > $min_max['maxY']) {
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$min_max['maxY'] = $y;
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}
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if (!isset($min_max['minY']) || $y < $min_max['minY']) {
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$min_max['minY'] = $y;
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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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* Generates parameters for the GIS data editor from the value of the GIS column.
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* This method performs common work.
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* More specific work is performed by each of the geom classes.
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*
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* @param string $value value of the GIS column
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*
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* @return array parameters for the GIS editor from the value of the GIS column
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* @access protected
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*/
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protected function generateParams($value)
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{
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$geom_types = '(POINT|MULTIPOINT|LINESTRING|MULTILINESTRING'
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. '|POLYGON|MULTIPOLYGON|GEOMETRYCOLLECTION)';
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$srid = 0;
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$wkt = '';
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if (preg_match("/^'" . $geom_types . "\(.*\)',[0-9]*$/i", $value)) {
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$last_comma = mb_strripos($value, ",");
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$srid = trim(mb_substr($value, $last_comma + 1));
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$wkt = trim(mb_substr($value, 1, $last_comma - 2));
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} elseif (preg_match("/^" . $geom_types . "\(.*\)$/i", $value)) {
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$wkt = $value;
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}
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return array('srid' => $srid, 'wkt' => $wkt);
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}
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/**
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* Extracts points, scales and returns them as an array.
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*
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* @param string $point_set string of comma separated points
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* @param array $scale_data data related to scaling
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* @param boolean $linear if true, as a 1D array, else as a 2D array
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*
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* @return array scaled points
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* @access protected
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*/
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protected function extractPoints($point_set, $scale_data, $linear = false)
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{
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$points_arr = array();
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// Separate each point
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$points = explode(",", $point_set);
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foreach ($points as $point) {
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// Extract coordinates of the point
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$cordinates = explode(" ", $point);
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if (!empty($cordinates[0]) && trim($cordinates[0]) != ''
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&& isset($cordinates[1])
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&& trim($cordinates[1]) != ''
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) {
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if ($scale_data != null) {
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$x = ($cordinates[0] - $scale_data['x']) * $scale_data['scale'];
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$y = $scale_data['height']
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- ($cordinates[1] - $scale_data['y']) * $scale_data['scale'];
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} else {
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$x = floatval(trim($cordinates[0]));
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$y = floatval(trim($cordinates[1]));
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}
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} else {
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$x = '';
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$y = '';
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}
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if (!$linear) {
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$points_arr[] = array($x, $y);
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} else {
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$points_arr[] = $x;
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$points_arr[] = $y;
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}
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}
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return $points_arr;
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}
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/**
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* Generates JavaScript for adding an array of polygons to OpenLayers.
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*
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* @param array $polygons x and y coordinates for each polygon
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* @param string $srid spatial reference id
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*
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* @return string JavaScript for adding an array of polygons to OpenLayers
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* @access protected
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*/
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protected function getPolygonArrayForOpenLayers($polygons, $srid)
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{
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$ol_array = 'new Array(';
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foreach ($polygons as $polygon) {
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$rings = explode("),(", $polygon);
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$ol_array .= $this->getPolygonForOpenLayers($rings, $srid) . ', ';
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}
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$ol_array
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= mb_substr(
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$ol_array,
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0,
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mb_strlen($ol_array) - 2
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);
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$ol_array .= ')';
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return $ol_array;
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}
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/**
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* Generates JavaScript for adding points for OpenLayers polygon.
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*
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* @param array $polygon x and y coordinates for each line
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* @param string $srid spatial reference id
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*
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* @return string JavaScript for adding points for OpenLayers polygon
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* @access protected
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*/
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protected function getPolygonForOpenLayers($polygon, $srid)
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{
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return 'new OpenLayers.Geometry.Polygon('
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. $this->getLineArrayForOpenLayers($polygon, $srid, false)
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. ')';
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}
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/**
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* Generates JavaScript for adding an array of LineString
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* or LineRing to OpenLayers.
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*
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* @param array $lines x and y coordinates for each line
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* @param string $srid spatial reference id
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* @param bool $is_line_string whether it's an array of LineString
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*
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* @return string JavaScript for adding an array of LineString
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* or LineRing to OpenLayers
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* @access protected
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*/
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protected function getLineArrayForOpenLayers(
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$lines,
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$srid,
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$is_line_string = true
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) {
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$ol_array = 'new Array(';
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foreach ($lines as $line) {
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$points_arr = $this->extractPoints($line, null);
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$ol_array .= $this->getLineForOpenLayers(
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$points_arr,
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$srid,
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$is_line_string
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);
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$ol_array .= ', ';
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}
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$ol_array
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= mb_substr(
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$ol_array,
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0,
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mb_strlen($ol_array) - 2
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);
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$ol_array .= ')';
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return $ol_array;
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}
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/**
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* Generates JavaScript for adding a LineString or LineRing to OpenLayers.
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*
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* @param array $points_arr x and y coordinates for each point
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* @param string $srid spatial reference id
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* @param bool $is_line_string whether it's a LineString
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*
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* @return string JavaScript for adding a LineString or LineRing to OpenLayers
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* @access protected
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*/
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protected function getLineForOpenLayers(
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$points_arr,
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$srid,
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$is_line_string = true
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) {
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return 'new OpenLayers.Geometry.'
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. ($is_line_string ? 'LineString' : 'LinearRing') . '('
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. $this->getPointsArrayForOpenLayers($points_arr, $srid)
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. ')';
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}
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/**
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* Generates JavaScript for adding an array of points to OpenLayers.
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*
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* @param array $points_arr x and y coordinates for each point
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* @param string $srid spatial reference id
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*
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* @return string JavaScript for adding an array of points to OpenLayers
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* @access protected
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*/
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protected function getPointsArrayForOpenLayers($points_arr, $srid)
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{
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$ol_array = 'new Array(';
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foreach ($points_arr as $point) {
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$ol_array .= $this->getPointForOpenLayers($point, $srid) . ', ';
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}
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$ol_array
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= mb_substr(
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$ol_array,
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0,
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mb_strlen($ol_array) - 2
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);
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$ol_array .= ')';
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return $ol_array;
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}
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/**
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* Generates JavaScript for adding a point to OpenLayers.
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*
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* @param array $point array containing the x and y coordinates of the point
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* @param string $srid spatial reference id
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*
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* @return string JavaScript for adding points to OpenLayers
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* @access protected
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*/
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protected function getPointForOpenLayers($point, $srid)
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{
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return '(new OpenLayers.Geometry.Point(' . $point[0] . ',' . $point[1] . '))'
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. '.transform(new OpenLayers.Projection("EPSG:'
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. intval($srid) . '"), map.getProjectionObject())';
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}
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}
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