libraries/gis/pma_gis_multilinestring.php

   1 <?php
   2 /**
   3  * Handles the visualization of GIS MULTILINESTRING objects.
   4  *
   5  * @package phpMyAdmin-GIS
   6  */
   7 class PMA_GIS_Multilinestring extends PMA_GIS_Geometry
   8 {
   9     // Hold the singleton instance of the class
  10     private static $_instance;
  11
  12     /**
  13      * A private constructor; prevents direct creation of object.
  14      */
  15     private function __construct()
  16     {
  17     }
  18
  19     /**
  20      * Returns the singleton.
  21      *
  22      * @return the singleton
  23      */
  24     public static function singleton()
  25     {
  26         if (!isset(self::$_instance)) {
  27             $class = __CLASS__;
  28             self::$_instance = new $class;
  29         }
  30
  31         return self::$_instance;
  32     }
  33
  34     /**
  35      * Scales each row.
  36      *
  37      * @param string $spatial spatial data of a row
  38      *
  39      * @return array containing the min, max values for x and y cordinates
  40      */
  41     public function scaleRow($spatial)
  42     {
  43         $min_max = array();
  44
  45         // Trim to remove leading 'MULTILINESTRING((' and trailing '))'
  46         $multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
  47         // Seperate each linestring
  48         $linestirngs = explode("),(", $multilinestirng);
  49
  50         foreach ($linestirngs as $linestring) {
  51             $min_max = $this->setMinMax($linestring, $min_max);
  52         }
  53
  54         return $min_max;
  55     }
  56
  57     /**
  58      * Adds to the PNG image object, the data related to a row in the GIS dataset.
  59      *
  60      * @param string $spatial    GIS MULTILINESTRING object
  61      * @param string $label      Label for the GIS MULTILINESTRING object
  62      * @param string $line_color Color for the GIS MULTILINESTRING object
  63      * @param array  $scale_data Array containing data related to scaling
  64      * @param image  $image      Image object
  65      *
  66      * @return the modified image object
  67      */
  68     public function prepareRowAsPng($spatial, $label, $line_color, $scale_data, $image)
  69     {
  70         // allocate colors
  71         $black = imagecolorallocate($image, 0, 0, 0);
  72         $red   = hexdec(substr($line_color, 1, 2));
  73         $green = hexdec(substr($line_color, 3, 2));
  74         $blue  = hexdec(substr($line_color, 4, 2));
  75         $color = imagecolorallocate($image, $red, $green, $blue);
  76
  77         // Trim to remove leading 'MULTILINESTRING((' and trailing '))'
  78         $multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
  79         // Seperate each linestring
  80         $linestirngs = explode("),(", $multilinestirng);
  81
  82         $first_line = true;
  83         foreach ($linestirngs as $linestring) {
  84             $points_arr = $this->extractPoints($linestring, $scale_data);
  85             foreach ($points_arr as $point) {
  86                 if (! isset($temp_point)) {
  87                     $temp_point = $point;
  88                 } else {
  89                     // draw line section
  90                     imageline($image, $temp_point[0], $temp_point[1], $point[0], $point[1], $color);
  91                     $temp_point = $point;
  92                 }
  93             }
  94             unset($temp_point);
  95             // print label if applicable
  96             if (isset($label) && trim($label) != '' && $first_line) {
  97                 imagestring($image, 1, $points_arr[1][0], $points_arr[1][1], trim($label), $black);
  98             }
  99             $first_line = false;
 100         }
 101         return $image;
 102     }
 103
 104     /**
 105      * Adds to the TCPDF instance, the data related to a row in the GIS dataset.
 106      *
 107      * @param string $spatial    GIS MULTILINESTRING object
 108      * @param string $label      Label for the GIS MULTILINESTRING object
 109      * @param string $line_color Color for the GIS MULTILINESTRING object
 110      * @param array  $scale_data Array containing data related to scaling
 111      * @param image  $pdf        TCPDF instance
 112      *
 113      * @return the modified TCPDF instance
 114      */
 115     public function prepareRowAsPdf($spatial, $label, $line_color, $scale_data, $pdf)
 116     {
 117         // allocate colors
 118         $red   = hexdec(substr($line_color, 1, 2));
 119         $green = hexdec(substr($line_color, 3, 2));
 120         $blue  = hexdec(substr($line_color, 4, 2));
 121         $line  = array('width' => 1.5, 'color' => array($red, $green, $blue));
 122
 123         // Trim to remove leading 'MULTILINESTRING((' and trailing '))'
 124         $multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
 125         // Seperate each linestring
 126         $linestirngs = explode("),(", $multilinestirng);
 127
 128         $first_line = true;
 129         foreach ($linestirngs as $linestring) {
 130             $points_arr = $this->extractPoints($linestring, $scale_data);
 131             foreach ($points_arr as $point) {
 132                 if (! isset($temp_point)) {
 133                     $temp_point = $point;
 134                 } else {
 135                     // draw line section
 136                     $pdf->Line($temp_point[0], $temp_point[1], $point[0], $point[1], $line);
 137                     $temp_point = $point;
 138                 }
 139             }
 140             unset($temp_point);
 141             // print label
 142             if (isset($label) && trim($label) != '' && $first_line) {
 143                 $pdf->SetXY($points_arr[1][0], $points_arr[1][1]);
 144                 $pdf->SetFontSize(5);
 145                 $pdf->Cell(0, 0, trim($label));
 146             }
 147             $first_line = false;
 148         }
 149         return $pdf;
 150     }
 151
 152     /**
 153      * Prepares and returns the code related to a row in the GIS dataset as SVG.
 154      *
 155      * @param string $spatial    GIS MULTILINESTRING object
 156      * @param string $label      Label for the GIS MULTILINESTRING object
 157      * @param string $line_color Color for the GIS MULTILINESTRING object
 158      * @param array  $scale_data Array containing data related to scaling
 159      *
 160      * @return the code related to a row in the GIS dataset
 161      */
 162     public function prepareRowAsSvg($spatial, $label, $line_color, $scale_data)
 163     {
 164         $line_options = array(
 165             'name'        => $label,
 166             'class'       => 'linestring vector',
 167             'fill'        => 'none',
 168             'stroke'      => $line_color,
 169             'stroke-width'=> 2,
 170         );
 171
 172         // Trim to remove leading 'MULTILINESTRING((' and trailing '))'
 173         $multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
 174         // Seperate each linestring
 175         $linestirngs = explode("),(", $multilinestirng);
 176
 177         $row = '';
 178         foreach ($linestirngs as $linestring) {
 179             $points_arr = $this->extractPoints($linestring, $scale_data);
 180
 181             $row .= '<polyline points="';
 182             foreach ($points_arr as $point) {
 183                 $row .= $point[0] . ',' . $point[1] . ' ';
 184             }
 185             $row .= '"';
 186             $line_options['id'] = $label . rand();
 187             foreach ($line_options as $option => $val) {
 188                 $row .= ' ' . $option . '="' . trim($val) . '"';
 189             }
 190             $row .= '/>';
 191         }
 192
 193         return $row;
 194     }
 195
 196     /**
 197      * Prepares JavaScript related to a row in the GIS dataset
 198      * to visualize it with OpenLayers.
 199      *
 200      * @param string $spatial    GIS MULTILINESTRING object
 201      * @param int    $srid       Spatial reference ID
 202      * @param string $label      Label for the GIS MULTILINESTRING object
 203      * @param string $line_color Color for the GIS MULTILINESTRING object
 204      * @param array  $scale_data Array containing data related to scaling
 205      *
 206      * @return JavaScript related to a row in the GIS dataset
 207      */
 208     public function prepareRowAsOl($spatial, $srid, $label, $line_color, $scale_data)
 209     {
 210         $style_options = array(
 211             'strokeColor' => $line_color,
 212             'strokeWidth' => 2,
 213             'label'       => $label,
 214             'fontSize'    => 10,
 215         );
 216         if ($srid == 0) {
 217             $srid = 4326;
 218         }
 219         $row = $this->getBoundsForOl($srid, $scale_data);
 220
 221         // Trim to remove leading 'MULTILINESTRING((' and trailing '))'
 222         $multilinestirng = substr($spatial, 17, (strlen($spatial) - 19));
 223         // Seperate each linestring
 224         $linestirngs = explode("),(", $multilinestirng);
 225
 226         $row .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector('
 227             . 'new OpenLayers.Geometry.MultiLineString(new Array(';
 228         foreach ($linestirngs as $linestring) {
 229             $points_arr = $this->extractPoints($linestring, null);
 230             $row .= 'new OpenLayers.Geometry.LineString(new Array(';
 231             foreach ($points_arr as $point) {
 232                 $row .= '(new OpenLayers.Geometry.Point(' . $point[0] . ', '
 233                     . $point[1] . ')).transform(new OpenLayers.Projection("EPSG:'
 234                     . $srid . '"), map.getProjectionObject()), ';
 235             }
 236             $row = substr($row, 0, strlen($row) - 2);
 237             $row .= ')), ';
 238         }
 239         $row = substr($row, 0, strlen($row) - 2);
 240         $row .= ')), null, ' . json_encode($style_options) . '));';
 241         return $row;
 242     }
 243
 244     /**
 245      * Generate the WKT with the set of parameters passed by the GIS editor.
 246      *
 247      * @param array  $gis_data GIS data
 248      * @param int    $index    Index into the parameter object
 249      * @param string $empty    Value for empty points
 250      *
 251      * @return WKT with the set of parameters passed by the GIS editor
 252      */
 253     public function generateWkt($gis_data, $index, $empty = '')
 254     {
 255         $no_of_lines = isset($gis_data[$index]['MULTILINESTRING']['no_of_lines'])
 256             ? $gis_data[$index]['MULTILINESTRING']['no_of_lines'] : 1;
 257         if ($no_of_lines < 1) {
 258             $no_of_lines = 1;
 259         }
 260         $wkt = 'MULTILINESTRING(';
 261         for ($i = 0; $i < $no_of_lines; $i++) {
 262             $no_of_points = isset($gis_data[$index]['MULTILINESTRING'][$i]['no_of_points'])
 263                 ? $gis_data[$index]['MULTILINESTRING'][$i]['no_of_points'] : 2;
 264             if ($no_of_points < 2) {
 265                 $no_of_points = 2;
 266             }
 267             $wkt .= '(';
 268             for ($j = 0; $j < $no_of_points; $j++) {
 269                 $wkt .= ((isset($gis_data[$index]['MULTILINESTRING'][$i][$j]['x'])
 270                     && trim($gis_data[$index]['MULTILINESTRING'][$i][$j]['x']) != '')
 271                     ? $gis_data[$index]['MULTILINESTRING'][$i][$j]['x'] : $empty)
 272                     . ' ' . ((isset($gis_data[$index]['MULTILINESTRING'][$i][$j]['y'])
 273                     && trim($gis_data[$index]['MULTILINESTRING'][$i][$j]['y']) != '')
 274                     ? $gis_data[$index]['MULTILINESTRING'][$i][$j]['y'] : $empty) . ',';
 275             }
 276             $wkt = substr($wkt, 0, strlen($wkt) - 1);
 277             $wkt .= '),';
 278         }
 279         $wkt = substr($wkt, 0, strlen($wkt) - 1);
 280         $wkt .= ')';
 281         return $wkt;
 282     }
 283
 284     /**
 285      * Generate the WKT for the data from ESRI shape files.
 286      *
 287      * @param array $row_data GIS data
 288      *
 289      * @return the WKT for the data from ESRI shape files
 290      */
 291     public function getShape($row_data)
 292     {
 293         $wkt = 'MULTILINESTRING(';
 294         for ($i = 0; $i < $row_data['numparts']; $i++) {
 295             $wkt .= '(';
 296             foreach ($row_data['parts'][$i]['points'] as $point) {
 297                 $wkt .= $point['x'] . ' ' . $point['y'] . ',';
 298             }
 299             $wkt = substr($wkt, 0, strlen($wkt) - 1);
 300             $wkt .= '),';
 301         }
 302         $wkt = substr($wkt, 0, strlen($wkt) - 1);
 303         $wkt .= ')';
 304         return $wkt;
 305     }
 306
 307     /**
 308      * Generate parameters for the GIS data editor from the value of the GIS column.
 309      *
 310      * @param string $value of the GIS column
 311      * @param index  $index of the geometry
 312      *
 313      * @return  parameters for the GIS data editor from the value of the GIS column
 314      */
 315     public function generateParams($value, $index = -1)
 316     {
 317         if ($index == -1) {
 318             $index = 0;
 319             $params = array();
 320             $data = PMA_GIS_Geometry::generateParams($value);
 321             $params['srid'] = $data['srid'];
 322             $wkt = $data['wkt'];
 323         } else {
 324             $params[$index]['gis_type'] = 'MULTILINESTRING';
 325             $wkt = $value;
 326         }
 327
 328         // Trim to remove leading 'MULTILINESTRING((' and trailing '))'
 329         $multilinestirng = substr($wkt, 17, (strlen($wkt) - 19));
 330         // Seperate each linestring
 331         $linestirngs = explode("),(", $multilinestirng);
 332         $params[$index]['MULTILINESTRING']['no_of_lines'] = count($linestirngs);
 333
 334         $j = 0;
 335         foreach ($linestirngs as $linestring) {
 336             $points_arr = $this->extractPoints($linestring, null);
 337             $no_of_points = count($points_arr);
 338             $params[$index]['MULTILINESTRING'][$j]['no_of_points'] = $no_of_points;
 339             for ($i = 0; $i < $no_of_points; $i++) {
 340                 $params[$index]['MULTILINESTRING'][$j][$i]['x'] = $points_arr[$i][0];
 341                 $params[$index]['MULTILINESTRING'][$j][$i]['y'] = $points_arr[$i][1];
 342             }
 343             $j++;
 344         }
 345         return $params;
 346     }
 347 }
 348 ?>