gmap_tracks.module in GMap Addons 5

Track overlays for GMap.

File

gmap_tracks/gmap_tracks.module

<?php

/**
 * @file
 * Track overlays for GMap.
 */

/**
 * Implementation of hook_gmap().
 */
function gmap_tracks_gmap($op, &$map = NULL) {
  switch ($op) {
    case 'macro_multiple':
      return array(
        'track',
      );
    case 'parse_macro':
      if (isset($map['track']) && is_array($map['track'])) {
        foreach ($map['track'] as $track) {
          $t = array();
          $cp = strpos($track, ':');
          if ($cp != false) {
            $stylestr = substr($track, 0, $cp);
            $t['style'] = _gmap_parse_style($stylestr);
            $t['filename'] = substr($track, $cp + 1);
            $map['tracks'][] = $t;
          }
        }
      }
      unset($map['track']);
      break;
    case 'pre_theme_map':
      if (!empty($map['tracks'])) {

        // Ensure the shapeloader is loaded.
        drupal_add_js(drupal_get_path('module', 'gmap') . '/js/shapeloader_static.js');
        drupal_add_js(drupal_get_path('module', 'gmap') . '/js/gmap_shapes.js');

        // Convert tracks to shapes.
        foreach ($map['tracks'] as $track) {
          $s = array(
            'type' => 'line',
          );
          $s['style'] = $track['style'];
          $s['points'] = _gmap_tracks_parse($track['filename']);
          $map['shapes'][] = $s;
        }
        unset($map['tracks']);
      }
      break;
  }
}

/**
 * Parse a plt file into coordinates.
 */
function _gmap_tracks_parse($track) {
  $points = array();
  $file = file_create_path($track);
  if ($file === FALSE) {
    drupal_set_message(t('Invalid path to track file!'));
  }
  else {
    if (!file_exists($file)) {
      drupal_set_message(t('Track file not found!'));
    }
    else {

      // @@@ Oversimplified OziExplorer PLT parser.
      // @@@ This needs improvement for various file types.
      if ($handle = fopen($file, 'r')) {
        while (!feof($handle)) {
          $line = fgets($handle, 4096);
          $line = explode(',', $line);
          if (count($line) == 7) {
            $points[] = array(
              (double) trim($line[0]),
              // latitude
              (double) trim($line[1]),
            );
          }
        }
        fclose($handle);
      }
    }
  }
  return $points;
}

Functions

Name	Description
gmap_tracks_gmap	Implementation of hook_gmap().
_gmap_tracks_parse	Parse a plt file into coordinates.