leaflet_geojson.module in Leaflet GeoJSON 7

API Extension for using Leaflet with GeoJSON that currently just allows to add a bbox strategy.

File

leaflet_geojson.module

<?php

/**
 * @file
 * API Extension for using Leaflet with GeoJSON that currently just allows to add a bbox strategy.
 */

/**
 * Add a Bounding Box Strategy
 *
 * @param $source_info
 *   The source info as specified in hook_leaflet_geojson_source_info().
 */
function leaflet_geojson_add_bbox_strategy($source_info) {

  // Add bounding box javascript.
  drupal_add_js(drupal_get_path('module', 'leaflet_geojson') . '/leaflet.bbox.js', array(
    'weight' => 5,
  ));

  // Add custom settings.
  $settings = $source_info;
  drupal_add_js(array(
    'leafletBBox' => $settings,
  ), 'setting');
}
function leaflet_geojson_source_get_info($source = NULL, $skip_cache = FALSE) {
  if (!$skip_cache) {
    static $drupal_static_fast;
    if (!isset($drupal_static_fast)) {
      $drupal_static_fast['leaflet_geojson_source_info'] =& drupal_static(__FUNCTION__);
    }
    $source_info =& $drupal_static_fast['leaflet_geojson_source_info'];
    if (empty($source_info)) {
      if ($cache = cache_get("leaflet_geojson_source_info")) {
        $source_info = $cache->data;
      }
    }
  }
  if (empty($source_info)) {
    $source_info = module_invoke_all('leaflet_geojson_source_info');

    // Let other modules alter the source info.
    drupal_alter('leaflet_geojson_source_info', $source_info);
    cache_set("leaflet_geojson_source_info", $source_info);
  }
  if (empty($source)) {
    return $source_info;
  }
  elseif (isset($source_info[$source])) {
    return $source_info[$source];
  }
}

/**
 * Implements hook_leaflet_geojson_source_info().
 */
function leaflet_geojson_leaflet_geojson_source_info() {
  $sources = array();
  $views = views_get_all_views();
  foreach ($views as $view) {
    foreach ($view->display as $display_name => $display) {
      $view
        ->set_display($display_name);

      // Make GeoJSON sources from the views_geojson module.
      if ($view->display_handler
        ->get_option('style_plugin') == 'views_geojson' && $display->display_plugin == 'page' && $display->handler
        ->get_option('path') != '') {
        $display_title = '(' . $display_name . ')';
        if (!empty($display->display_title)) {
          $display_title = $display->display_title . ' ' . $display_title;
        }
        $title = $view->human_name . ' - ' . $display_title;
        $source = array(
          'id' => $view->name . '_' . $display_name,
          'title' => $title,
          'type' => 'views_geojson',
          'url' => url($view->display_handler
            ->get_option('path'), array(
            'absolute' => TRUE,
          )),
        );

        // Determine if we should use a BBox strategy.
        if ($arguments = $display->handler
          ->get_option('arguments')) {
          if ($arguments['bbox_argument']['default_argument_type'] == 'querystring') {
            $source['bbox'] = TRUE;
            if (isset($arguments['bbox_argument']['default_argument_options'])) {
              $source['bbox_arg_id'] = $arguments['bbox_argument']['default_argument_options']['arg_id'];
            }
          }
        }

        // Custom views_geojson attributes.
        $source['view'] = $view->name;
        $source['view_display'] = $display;
        $sources[$source['id']] = $source;
      }
    }
    $view
      ->destroy();
  }
  return $sources;
}

Functions

Name	Description
leaflet_geojson_add_bbox_strategy	Add a Bounding Box Strategy
leaflet_geojson_leaflet_geojson_source_info	Implements hook_leaflet_geojson_source_info().
leaflet_geojson_source_get_info