Issue 1399: fix potential problem with filterWorkspace String conversion

This also adds some additional trace information which exception was
triggered.

src/modules/sway/window.cpp

@@ -26,6 +26,7 @@ Window::Window(const std::string& id, const Bar& bar, const Json::Value& config)
       ipc_.handleEvent();
     } catch (const std::exception& e) {
       spdlog::error("Window: {}", e.what());
+      spdlog::trace("Window::Window exception");
     }
   });
 }
@@ -42,6 +43,7 @@ void Window::onCmd(const struct Ipc::ipc_response& res) {
     dp.emit();
   } catch (const std::exception& e) {
     spdlog::error("Window: {}", e.what());
+    spdlog::trace("Window::onCmd exception");
   }
 }
 
@@ -161,9 +163,9 @@ std::pair<int, int> leafNodesInWorkspace(const Json::Value& node) {
   auto const& nodes = node["nodes"];
   auto const& floating_nodes = node["floating_nodes"];
   if(nodes.empty() && floating_nodes.empty()) {
-    if(node["type"] == "workspace")
+    if(node["type"].asString() == "workspace")
       return {0,0};
-    else if (node["type"] == "floating_con") {
+    else if (node["type"].asString() == "floating_con") {
       return {0,1};
     } else {
       return {1,0};
@@ -189,21 +191,24 @@ std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWith
     const Bar& bar_, Json::Value& parentWorkspace, Json::Value& filterWorkspace, const Json::Value& immediateParent) {
   bool found_visible = false;
   for(auto const& node : nodes) {
-    if (node["type"] == "output") {
+    if (node["type"].asString() == "output") {
       if (!config_["all-outputs"].asBool() && node["name"].asString() != bar_.output->name) {
         continue;
       }
       filterWorkspace = node["current_workspace"];
       output = node["name"].asString();
     }
-    else if(node["type"] == "workspace") {
+    else if(node["type"].asString() == "workspace") {
+      if (!filterWorkspace.isString()) {
+        continue;
+      }
       // needs to be a string comparison, because filterWorkspace is the current_workspace
       if (node["name"].asString() != filterWorkspace.asString()) {
         continue;
       }
       parentWorkspace = node;
     }
-    else if (node["type"] == "con" || node["type"] == "floating_con") {
+    else if (node["type"].asString() == "con" || node["type"].asString() == "floating_con") {
       // found node
       if (node["focused"].asBool()) {
         spdlog::trace("actual output {}, output found {}, node (focused) found {}", bar_.output->name, output, node["name"].asString());
@@ -216,16 +221,15 @@ std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWith
           std::pair all_leaf_nodes = leafNodesInWorkspace(parentWorkspace);
           nb = all_leaf_nodes.first;
           floating_count = all_leaf_nodes.second;
-          if (parentWorkspace["layout"].isString()) {
-            workspace_layout = parentWorkspace["layout"].asString();
-          }
+          workspace_layout = parentWorkspace["layout"].asString();
         }
         return {nb,
           floating_count,
           node["id"].asInt(),
           Glib::Markup::escape_text(node["name"].asString()),
           app_id, 
           workspace_layout};
+
       }
       //record visible nodes, but since we don't know if a focused node is yet found, we can't return anything yet
       else if (!config_["all-outputs"].asBool() && node["visible"].asBool()) {
@@ -245,6 +249,7 @@ std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWith
       return {nb2, f2, id2, name2, app_id2,workspace_layout2};
     }
   }
+
   // This is needed so the recursion isn't finished early before finding a focused node when using offscreen-text
   if (found_visible && immediateParent["type"].asString() == "workspace") {
     int tiled_count = 0;
@@ -254,13 +259,12 @@ std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWith
         std::pair all_leaf_nodes = leafNodesInWorkspace(parentWorkspace);
         tiled_count = all_leaf_nodes.first;
         floating_count = all_leaf_nodes.second;
-        if (parentWorkspace["layout"].isString()) {
-          workspace_layout = parentWorkspace["layout"].asString();
-        }
+        workspace_layout = parentWorkspace["layout"].asString();
     }
     //using an empty string as default ensures that no window depending styles are set due to the checks above for !name.empty()
-    return {tiled_count, floating_count, 0, config_["offscreen-text"].isString() ? config_["offscreen-text"].asString() : "", "", workspace_layout};
+    return {tiled_count, floating_count, 0, config_["offscreen-text"].asString(), "", workspace_layout};
   }
+
   return {0, 0, -1, "", "", ""};
 }
 
@@ -275,6 +279,7 @@ void Window::getTree() {
     ipc_.sendCmd(IPC_GET_TREE);
   } catch (const std::exception& e) {
     spdlog::error("Window: {}", e.what());
+    spdlog::trace("Window::getTree exception");
   }
 }