Issue 1399: style refactor Part 4: allow off-screen styling

requires new config "offscreen-text", if left empty, no styles are set.
If config "all-outputs" is set, this has no effect.

src/modules/sway/window.cpp

@@ -126,14 +126,18 @@ std::pair<int, int> leafNodesInWorkspace(const Json::Value& node) {
 std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWithWorkspace(
     const Json::Value& nodes, std::string& output, const Json::Value& config_,
     const Bar& bar_, Json::Value& parentWorkspace) {
+  bool found_visible = false;
   for(auto const& node : nodes) {
     if (node["output"].isString()) {
       output = node["output"].asString();
+      if (!config_["all-outputs"].asBool() && output != bar_.output->name) {
+        continue;
+      }
     }
-    // found node
-    if (node["focused"].asBool() && (node["type"] == "con" || node["type"] == "floating_con")) {
-      if ((!config_["all-outputs"].asBool() && output == bar_.output->name) ||
-          config_["all-outputs"].asBool()) {
+    if (node["type"] == "con" || node["type"] == "floating_con") {
+      // found node
+      if (node["focused"].asBool()) {
+        spdlog::trace("actual output {}, output found {}, node (focused) found {}", bar_.output->name, output, node["name"].asString());
         auto app_id = node["app_id"].isString() ? node["app_id"].asString()
                       : node["window_properties"]["instance"].asString();
         int nb = node.size();
@@ -154,7 +158,14 @@ std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWith
           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()) {
+        spdlog::trace("actual output {}, output found {}, node (visible) found {}", bar_.output->name, output, node["name"].asString());
+        found_visible=true;
+      }
     }
+
+
     // iterate
     if(node["type"] == "workspace")
       parentWorkspace = node;
@@ -168,6 +179,21 @@ std::tuple<std::size_t, int, int, std::string, std::string, std::string> gfnWith
       return {nb, f, id, name, app_id,workspace_layout};
     }
   }
+  if (found_visible) {
+    int tiled_count = 0;
+    int floating_count = 0;
+    std::string workspace_layout = "";
+    if(parentWorkspace != 0) {
+        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();
+        }
+    }
+    //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 {0, 0, -1, "", "", ""};
 }