tbl_gis_visualization.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * handles creation of the GIS visualizations.
   5  *
   6  * @package PhpMyAdmin
   7  */
   8
   9 require_once 'libraries/common.inc.php';
  10
  11 // Runs common work
  12 require_once 'libraries/db_common.inc.php';
  13 $url_params['goto'] = $cfg['DefaultTabDatabase'];
  14 $url_params['back'] = 'sql.php';
  15
  16 // Import visualization functions
  17 require_once 'libraries/tbl_gis_visualization.lib.php';
  18
  19 $response = PMA_Response::getInstance();
  20 // Throw error if no sql query is set
  21 if (! isset($sql_query) || $sql_query == '') {
  22     $response->isSuccess(false);
  23     $response->addHTML(
  24         PMA_Message::error(__('No SQL query was set to fetch data.'))
  25     );
  26     exit;
  27 }
  28
  29 // Execute the query and return the result
  30 $result = $GLOBALS['dbi']->tryQuery($sql_query);
  31 // Get the meta data of results
  32 $meta = $GLOBALS['dbi']->getFieldsMeta($result);
  33
  34 // Find the candidate fields for label column and spatial column
  35 $labelCandidates = array(); $spatialCandidates = array();
  36 foreach ($meta as $column_meta) {
  37     if ($column_meta->type == 'geometry') {
  38         $spatialCandidates[] = $column_meta->name;
  39     } else {
  40         $labelCandidates[] = $column_meta->name;
  41     }
  42 }
  43
  44 // Get settings if any posted
  45 $visualizationSettings = array();
  46 if (PMA_isValid($_REQUEST['visualizationSettings'], 'array')) {
  47     $visualizationSettings = $_REQUEST['visualizationSettings'];
  48 }
  49
  50 if (! isset($visualizationSettings['labelColumn']) && isset($labelCandidates[0])) {
  51     $visualizationSettings['labelColumn'] = '';
  52 }
  53
  54 // If spatial column is not set, use first geometric column as spatial column
  55 if (! isset($visualizationSettings['spatialColumn'])) {
  56     $visualizationSettings['spatialColumn'] = $spatialCandidates[0];
  57 }
  58
  59 // Convert geometric columns from bytes to text.
  60 $modified_query = PMA_GIS_modifyQuery($sql_query, $visualizationSettings);
  61 $modified_result = $GLOBALS['dbi']->tryQuery($modified_query);
  62
  63 $data = array();
  64 while ($row = $GLOBALS['dbi']->fetchAssoc($modified_result)) {
  65     $data[] = $row;
  66 }
  67
  68 if (isset($_REQUEST['saveToFile'])) {
  69     $response->disable();
  70     $file_name = $visualizationSettings['spatialColumn'];
  71     $save_format = $_REQUEST['fileFormat'];
  72     PMA_GIS_saveToFile($data, $visualizationSettings, $save_format, $file_name);
  73     exit();
  74 }
  75
  76 $header = $response->getHeader();
  77 $scripts = $header->getScripts();
  78 $scripts->addFile('openlayers/OpenLayers.js');
  79 $scripts->addFile('jquery/jquery.svg.js');
  80 $scripts->addFile('tbl_gis_visualization.js');
  81 $scripts->addFile('OpenStreetMap.js');
  82
  83 // If all the rows contain SRID, use OpenStreetMaps on the initial loading.
  84 if (! isset($_REQUEST['displayVisualization'])) {
  85     $visualizationSettings['choice'] = 'useBaseLayer';
  86     foreach ($data as $row) {
  87         if ($row['srid'] == 0) {
  88             unset($visualizationSettings['choice']);
  89             break;
  90         }
  91     }
  92 }
  93
  94 $svg_support = (PMA_USR_BROWSER_AGENT == 'IE' && PMA_USR_BROWSER_VER <= 8)
  95     ? false : true;
  96 $format = $svg_support ? 'svg' : 'png';
  97
  98 // get the chart and settings after chart generation
  99 $visualization = PMA_GIS_visualizationResults(
 100     $data, $visualizationSettings, $format
 101 );
 102
 103 /**
 104  * Displays the page
 105  */
 106
 107 $html = PMA_getHtmlForGisVisualization(
 108     $url_params, $labelCandidates, $spatialCandidates,
 109     $visualizationSettings, $sql_query, $visualization, $svg_support,
 110     $data
 111 );
 112
 113 $response->addHTML($html);
 114
 115 ?>