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