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Chris Sewell
348
html/phpmyad/libraries/gis/pma_gis_multilinestring.php
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348
html/phpmyad/libraries/gis/pma_gis_multilinestring.php
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<?php
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/**
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* Handles the visualization of GIS MULTILINESTRING objects.
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*
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* @package PhpMyAdmin-GIS
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*/
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class PMA_GIS_Multilinestring 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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$min_max = array();
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
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// Seperate each linestring
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$linestirngs = explode("),(", $multilinestirng);
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foreach ($linestirngs as $linestring) {
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$min_max = $this->setMinMax($linestring, $min_max);
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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 MULTILINESTRING object
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param string $line_color Color for the GIS MULTILINESTRING 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, $line_color, $scale_data, $image)
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{
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// allocate colors
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$black = imagecolorallocate($image, 0, 0, 0);
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$red = hexdec(substr($line_color, 1, 2));
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$green = hexdec(substr($line_color, 3, 2));
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$blue = hexdec(substr($line_color, 4, 2));
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$color = imagecolorallocate($image, $red, $green, $blue);
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
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// Seperate each linestring
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$linestirngs = explode("),(", $multilinestirng);
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$first_line = true;
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foreach ($linestirngs as $linestring) {
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$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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$temp_point = $point;
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} else {
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// draw line section
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imageline($image, $temp_point[0], $temp_point[1], $point[0], $point[1], $color);
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$temp_point = $point;
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}
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}
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unset($temp_point);
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// print label if applicable
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if (isset($label) && trim($label) != '' && $first_line) {
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imagestring($image, 1, $points_arr[1][0], $points_arr[1][1], trim($label), $black);
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}
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$first_line = false;
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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 MULTILINESTRING object
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param string $line_color Color for the GIS MULTILINESTRING 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, $line_color, $scale_data, $pdf)
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{
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// allocate colors
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$red = hexdec(substr($line_color, 1, 2));
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$green = hexdec(substr($line_color, 3, 2));
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$blue = hexdec(substr($line_color, 4, 2));
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$line = array('width' => 1.5, 'color' => array($red, $green, $blue));
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
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// Seperate each linestring
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$linestirngs = explode("),(", $multilinestirng);
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$first_line = true;
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foreach ($linestirngs as $linestring) {
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$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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$temp_point = $point;
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} else {
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// draw line section
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$pdf->Line($temp_point[0], $temp_point[1], $point[0], $point[1], $line);
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$temp_point = $point;
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}
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}
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unset($temp_point);
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// print label
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if (isset($label) && trim($label) != '' && $first_line) {
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$pdf->SetXY($points_arr[1][0], $points_arr[1][1]);
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$pdf->SetFontSize(5);
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$pdf->Cell(0, 0, trim($label));
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}
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$first_line = false;
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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 MULTILINESTRING object
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param string $line_color Color for the GIS MULTILINESTRING 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, $line_color, $scale_data)
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{
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$line_options = array(
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'name' => $label,
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'class' => 'linestring vector',
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'fill' => 'none',
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'stroke' => $line_color,
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'stroke-width'=> 2,
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);
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
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// Seperate each linestring
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$linestirngs = explode("),(", $multilinestirng);
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$row = '';
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foreach ($linestirngs as $linestring) {
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$points_arr = $this->extractPoints($linestring, $scale_data);
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$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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$line_options['id'] = $label . rand();
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foreach ($line_options as $option => $val) {
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$row .= ' ' . $option . '="' . trim($val) . '"';
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}
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$row .= '/>';
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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 MULTILINESTRING object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param string $line_color Color for the GIS MULTILINESTRING 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, $line_color, $scale_data)
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{
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$style_options = array(
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'strokeColor' => $line_color,
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'strokeWidth' => 2,
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'label' => $label,
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'fontSize' => 10,
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);
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if ($srid == 0) {
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$srid = 4326;
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}
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$row = $this->getBoundsForOl($srid, $scale_data);
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
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// Seperate each linestring
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$linestirngs = explode("),(", $multilinestirng);
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$row .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector('
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. 'new OpenLayers.Geometry.MultiLineString(new Array(';
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foreach ($linestirngs as $linestring) {
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$points_arr = $this->extractPoints($linestring, null);
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$row .= 'new OpenLayers.Geometry.LineString(new Array(';
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foreach ($points_arr as $point) {
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$row .= '(new OpenLayers.Geometry.Point(' . $point[0] . ', '
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. $point[1] . ')).transform(new OpenLayers.Projection("EPSG:'
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. $srid . '"), map.getProjectionObject()), ';
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}
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$row = substr($row, 0, strlen($row) - 2);
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$row .= ')), ';
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}
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$row = substr($row, 0, strlen($row) - 2);
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$row .= ')), null, ' . json_encode($style_options) . '));';
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return $row;
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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, $empty = '')
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{
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$no_of_lines = isset($gis_data[$index]['MULTILINESTRING']['no_of_lines'])
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? $gis_data[$index]['MULTILINESTRING']['no_of_lines'] : 1;
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if ($no_of_lines < 1) {
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$no_of_lines = 1;
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}
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$wkt = 'MULTILINESTRING(';
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for ($i = 0; $i < $no_of_lines; $i++) {
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$no_of_points = isset($gis_data[$index]['MULTILINESTRING'][$i]['no_of_points'])
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? $gis_data[$index]['MULTILINESTRING'][$i]['no_of_points'] : 2;
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if ($no_of_points < 2) {
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$no_of_points = 2;
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}
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$wkt .= '(';
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for ($j = 0; $j < $no_of_points; $j++) {
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$wkt .= ((isset($gis_data[$index]['MULTILINESTRING'][$i][$j]['x'])
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&& trim($gis_data[$index]['MULTILINESTRING'][$i][$j]['x']) != '')
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? $gis_data[$index]['MULTILINESTRING'][$i][$j]['x'] : $empty)
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. ' ' . ((isset($gis_data[$index]['MULTILINESTRING'][$i][$j]['y'])
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&& trim($gis_data[$index]['MULTILINESTRING'][$i][$j]['y']) != '')
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? $gis_data[$index]['MULTILINESTRING'][$i][$j]['y'] : $empty) . ',';
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}
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$wkt = substr($wkt, 0, strlen($wkt) - 1);
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$wkt .= '),';
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}
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$wkt = substr($wkt, 0, strlen($wkt) - 1);
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$wkt .= ')';
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return $wkt;
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}
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/**
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* Generate the WKT for the data from ESRI shape files.
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*
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* @param array $row_data GIS data
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*
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* @return the WKT for the data from ESRI shape files
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*/
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public function getShape($row_data)
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{
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$wkt = 'MULTILINESTRING(';
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for ($i = 0; $i < $row_data['numparts']; $i++) {
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$wkt .= '(';
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foreach ($row_data['parts'][$i]['points'] as $point) {
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$wkt .= $point['x'] . ' ' . $point['y'] . ',';
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}
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$wkt = substr($wkt, 0, strlen($wkt) - 1);
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$wkt .= '),';
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}
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$wkt = substr($wkt, 0, strlen($wkt) - 1);
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$wkt .= ')';
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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 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, $index = -1)
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{
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if ($index == -1) {
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$index = 0;
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$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 = $data['wkt'];
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} else {
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$params[$index]['gis_type'] = 'MULTILINESTRING';
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$wkt = $value;
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}
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilinestirng = substr($wkt, 17, (strlen($wkt) - 19));
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// Seperate each linestring
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$linestirngs = explode("),(", $multilinestirng);
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$params[$index]['MULTILINESTRING']['no_of_lines'] = count($linestirngs);
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$j = 0;
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foreach ($linestirngs as $linestring) {
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$points_arr = $this->extractPoints($linestring, null);
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$no_of_points = count($points_arr);
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$params[$index]['MULTILINESTRING'][$j]['no_of_points'] = $no_of_points;
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for ($i = 0; $i < $no_of_points; $i++) {
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$params[$index]['MULTILINESTRING'][$j][$i]['x'] = $points_arr[$i][0];
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$params[$index]['MULTILINESTRING'][$j][$i]['y'] = $points_arr[$i][1];
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}
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$j++;
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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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