Use num_changes to detect empty changesets instead of the bbox

[rails.git] / app / views / browse / start.rjs

diff --git a/app/views/browse/start.rjs b/app/views/browse/start.rjs
index 64e4431a4c4aee9e175506a22abf5661dd4e7d3b..b96e8c39c6ecd1d29859123264f4fd1d559bb898 100644 (file)
--- a/app/views/browse/start.rjs
+++ b/app/views/browse/start.rjs
@@ -2,7 +2,6 @@ page.replace_html :sidebar_title, t('browse.start_rjs.data_frame_title')
 page.replace_html :sidebar_content, :partial => 'start'
 page << <<EOJ
   var browseBoxControl;
-  var browseActive;
   var browseMode = "auto";
   var browseBounds;
   var browseFeatureList;
@@ -10,12 +9,13 @@ page << <<EOJ
   var browseDataLayer;
   var browseSelectControl;
   var browseObjectList;
+  var areasHidden = false;
 
   OpenLayers.Feature.Vector.style['default'].strokeWidth = 3;
   OpenLayers.Feature.Vector.style['default'].cursor = "pointer";
     
   function startBrowse() {
-    browseActive = true;
+    map.dataLayer.active = true;
 
     openSidebar({ onclose: stopBrowse });
 
@@ -26,20 +26,24 @@ page << <<EOJ
         sides: 4,
         snapAngle: 90,
         irregular: true,
-        persist: true,
-        callbacks: { done: endDrag }
+        persist: true
       }
     });
+    browseBoxControl.handler.callbacks.done = endDrag;
     map.addControl(browseBoxControl);
 
     map.events.register("moveend", map, showData);
     map.events.triggerEvent("moveend");
+
+    $("browse_hide_areas_box").innerHTML = "#{I18n.t('browse.start_rjs.hide_areas')}";
+    $("browse_hide_areas_box").style.display = "inline";
+    $("browse_hide_areas_box").onclick = hideAreas;
   }
 
   function showData() {
     if (browseMode == "auto") {
       if (map.getZoom() >= 15) {
-          useMap();
+          useMap(false);
       } else {
           setStatus("#{I18n.t('browse.start_rjs.zoom_or_select')}");
       }    
@@ -47,8 +51,8 @@ page << <<EOJ
   }
 
   function stopBrowse() {
-    if (browseActive) {
-      browseActive = false;
+    if (map.dataLayer.active) {
+      map.dataLayer.active = false;
 
       if (browseSelectControl) {   
         browseSelectControl.destroy();  
@@ -57,7 +61,7 @@ page << <<EOJ
 
       if (browseBoxControl) {
        browseBoxControl.destroy();
-       browseBoxControl = null;
+        browseBoxControl = null;
       }                
 
       if (browseActiveFeature) {
@@ -76,7 +80,7 @@ page << <<EOJ
   }
 
   function startDrag() {
-    $("browse_select_box").innerHTML='#{I18n.t('browse.start_rjs.drag_a_box')}';
+    $("browse_select_box").innerHTML="#{I18n.t('browse.start_rjs.drag_a_box')}";
 
     browseBoxControl.activate();
 
@@ -85,7 +89,7 @@ page << <<EOJ
 
   $("browse_select_box").onclick = startDrag;
 
-  function useMap() {
+  function useMap(reload) {
     var bounds = map.getExtent();
     var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
 
@@ -99,7 +103,7 @@ page << <<EOJ
                                              center.lat + (tileHeight / 2));
 
       browseBounds = tileBounds;
-      getData(tileBounds);
+      getData(tileBounds, reload);
 
       browseMode = "auto";
 
@@ -109,6 +113,26 @@ page << <<EOJ
     return false;
   }
 
+  function hideAreas() {
+      $("browse_hide_areas_box").innerHTML = "#{I18n.t('browse.start_rjs.show_areas')}";
+      $("browse_hide_areas_box").style.display = "inline";
+      $("browse_hide_areas_box").onclick = showAreas;
+
+      areasHidden = true;
+
+      useMap(true);
+  }
+
+  function showAreas() {
+      $("browse_hide_areas_box").innerHTML = "#{I18n.t('browse.start_rjs.hide_areas')}";
+      $("browse_hide_areas_box").style.display = "inline";
+      $("browse_hide_areas_box").onclick = hideAreas;
+
+      areasHidden = false;
+
+      useMap(true);
+  }
+
   $("browse_select_view").onclick = useMap;
 
   function endDrag(bbox) {
@@ -131,7 +155,7 @@ page << <<EOJ
     var div = document.createElement("div");
 
     var p = document.createElement("p");
-    p.appendChild(document.createTextNode(i18n_js("#{I18n.t('browse.start_rjs.loaded_an_area_with_num_features', :num_features => '{{num_features}}')}", { num_features: browseFeatureList.length })));
+    p.appendChild(document.createTextNode(i18n("#{I18n.t('browse.start_rjs.loaded_an_area_with_num_features')}", { num_features: browseFeatureList.length })));
     div.appendChild(p);
 
     var input = document.createElement("input");
@@ -154,7 +178,7 @@ page << <<EOJ
   }    
 
   function customDataLoader(request) {
-    if (browseActive) {
+    if (this.map.dataLayer.active) {
       var doc = request.responseXML;
 
       if (!doc || !doc.documentElement) {
@@ -182,22 +206,29 @@ page << <<EOJ
     }
   }
 
-  function getData(bounds) {
+  function getData(bounds, reload) {
     var projected = bounds.clone().transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
     var size = projected.getWidth() * projected.getHeight();
 
-    if (size > #{APP_CONFIG['max_request_area']}) {
-      setStatus(i18n_js("#{I18n.t('browse.start_rjs.unable_to_load_size', :bbox_size => '{{bbox_size}}', :max_bbox_size => APP_CONFIG['max_request_area'])}", { bbox_size: size }));
+    if (size > #{MAX_REQUEST_AREA}) {
+      setStatus(i18n("#{I18n.t('browse.start_rjs.unable_to_load_size', :max_bbox_size => MAX_REQUEST_AREA)}", { bbox_size: size }));
     } else {
-      loadGML("/api/#{API_VERSION}/map?bbox=" + projected.toBBOX());
+      loadGML("/api/#{API_VERSION}/map?bbox=" + projected.toBBOX(), reload);
     }
   }
 
-  function loadGML(url) {
+  function loadGML(url, reload) {
     setStatus("#{I18n.t('browse.start_rjs.loading')}");
     $("browse_content").innerHTML = "";
 
-    if (!browseDataLayer) {
+    var formatOptions = {
+      checkTags: true,
+      interestingTagsExclude: ['source','source_ref','source:ref','history','attribution','created_by','tiger:county','tiger:tlid','tiger:upload_uuid']
+    };
+
+    if (areasHidden) formatOptions.areaTags = [];
+
+    if (!browseDataLayer || reload) {
       var style = new OpenLayers.Style();
 
       style.addRules([new OpenLayers.Rule({
@@ -208,12 +239,11 @@ page << <<EOJ
         }
       })]);
 
+      if (browseDataLayer) browseDataLayer.destroyFeatures();
+
       browseDataLayer = new OpenLayers.Layer.GML("Data", url, {
         format: OpenLayers.Format.OSM,
-        formatOptions: {
-          checkTags: true, 
-          interestingTagsExclude: ['source','source_ref','source:ref','history','attribution','created_by','tiger:county','tiger:tlid','tiger:upload_uuid']
-        },
+        formatOptions: formatOptions,
         maxFeatures: 100,
         requestSuccess: customDataLoader,
         displayInLayerSwitcher: false,
@@ -231,6 +261,8 @@ page << <<EOJ
       map.addControl(browseSelectControl);
       browseSelectControl.activate();
     } else {
+      browseDataLayer.destroyFeatures();
+      browseDataLayer.format(formatOptions);
       browseDataLayer.setUrl(url);
     }
 
@@ -238,9 +270,9 @@ page << <<EOJ
   }
 
   function dataLoaded() {
-    if (browseActive) {
+    if (this.map.dataLayer.active) {
       clearStatus();
-        
+
       browseObjectList = document.createElement("div")
 
       var heading = document.createElement("p");
@@ -262,7 +294,7 @@ page << <<EOJ
         // Link, for viewing in the tab
         var link = document.createElement("a");
         link.href =  "/browse/" + type + "/" + feature.osm_id; 
-        var name = feature.attributes.name || feature.osm_id;
+        var name = featureName(feature);
         link.appendChild(document.createTextNode(name));
         link.feature = feature;
         link.onclick = OpenLayers.Function.bind(viewFeatureLink, link);   
@@ -421,7 +453,7 @@ page << <<EOJ
     table.appendChild(tr);
 
     var heading = document.createElement("td");
-    heading.appendChild(document.createTextNode(i18n_js("#{I18n.t('browse.start_rjs.history_for_feature', :feature => '{{feature}}')}", { feature: featureNameHistory(this.feature) })));
+    heading.appendChild(document.createTextNode(i18n("#{I18n.t('browse.start_rjs.history_for_feature')}", { feature: featureNameHistory(this.feature) })));
     tr.appendChild(heading);
 
     var td = document.createElement("td");
@@ -442,7 +474,7 @@ page << <<EOJ
       var user = nodes[i].getAttribute("user") || "#{I18n.t('browse.start_rjs.private_user')}";
       var timestamp = nodes[i].getAttribute("timestamp");
       var item = document.createElement("li");
-      item.appendChild(document.createTextNode(i18n_js("#{I18n.t('browse.start_rjs.edited_by_user_at_timestamp', :user => '{{user}}', :timestamp => '{{timestamp}}')}", { user: user, timestamp: timestamp })));
+      item.appendChild(document.createTextNode(i18n("#{I18n.t('browse.start_rjs.edited_by_user_at_timestamp')}", { user: user, timestamp: timestamp })));
       history.appendChild(item);
     }
     div.appendChild(history);
@@ -466,42 +498,40 @@ page << <<EOJ
     }
   }
 
+  function featureName(feature) {
+    if (feature.attributes['name:#{I18n.locale}']) {
+      return feature.attributes['name:#{I18n.locale}'];
+    } else if (feature.attributes.name) {
+      return feature.attributes.name;
+    } else {
+      return feature.osm_id;
+    }
+  }
+
   function featureNameSelect(feature) {
-    if (feature.attributes.name) {
+    if (feature.attributes['name:#{I18n.locale}']) {
+      return feature.attributes['name:#{I18n.locale}'];
+    } else if (feature.attributes.name) {
       return feature.attributes.name;
     } else if (featureType(feature) == "node") {
-      return i18n_js("#{I18n.t('browse.start_rjs.object_list.selected.type.node', :id => '{{id}}')}", { id: feature.osm_id });
+      return i18n("#{I18n.t('browse.start_rjs.object_list.selected.type.node')}", { id: feature.osm_id });
     } else if (featureType(feature) == "way") {
-      return i18n_js("#{I18n.t('browse.start_rjs.object_list.selected.type.way',  :id => '{{id}}')}", { id: feature.osm_id });
+      return i18n("#{I18n.t('browse.start_rjs.object_list.selected.type.way')}", { id: feature.osm_id });
     }
   }
 
   function featureNameHistory(feature) {
-    if (feature.attributes.name) {
+    if (feature.attributes['name:#{I18n.locale}']) {
+      return feature.attributes['name:#{I18n.locale}'];
+    } else if (feature.attributes.name) {
       return feature.attributes.name;
     } else if (featureType(feature) == "node") {
-      return i18n_js("#{I18n.t('browse.start_rjs.object_list.history.type.node', :id => '{{id}}')}", { id: feature.osm_id });
+      return i18n("#{I18n.t('browse.start_rjs.object_list.history.type.node')}", { id: feature.osm_id });
     } else if (featureType(feature) == "way") {
-      return i18n_js("#{I18n.t('browse.start_rjs.object_list.history.type.way',  :id => '{{id}}')}", { id: feature.osm_id });
+      return i18n("#{I18n.t('browse.start_rjs.object_list.history.type.way')}", { id: feature.osm_id });
     }
   }
 
-  /*
-   This is a hack so that we can interpolate JavaScript variables in
-   translation strings from Ruby, doing the string replacement
-   client-side instead of on the server.
-  */
-  function i18n_js(string, keys) {
-    for (var key in keys) {
-      var re_key = '\{\{' + key + '\}\}';
-      var re = new RegExp(re_key, "g");
-
-      string = string.replace(re, keys[key]);
-    }
-
-    return string;
-  } 
-
   function setStatus(status) {
     $("browse_status").innerHTML = status;
     $("browse_status").style.display = "block";