dart, windows, android: add util.workspace to get workspace dir

- windows: current exe folder
- android: app data dir

Author: dna2github

android/app/src/main/java/net/seven/nodebase/nodebase/MainActivity.java

@@ -93,6 +93,9 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result
                     case "util.arch" -> {
                         result.success(External.getArch());
                     }
+                    case "util.workspace" -> {
+                        result.success(workspaceBaseDir());
+                    }
                 }
             }
         });
@@ -151,4 +154,8 @@ public boolean fileExecutablize(String fname) {
         File f = new File(fname);
         return f.setExecutable(true, true);
     }
+
+    public String workspaceBaseDir() {
+        return getContext().getApplicationInfo().dataDir;
+    }
 }

lib/util/api.dart

@@ -44,6 +44,15 @@ class NodeBaseApi {
     }
   }
 
+  static Future<String> apiUtilGetWorkspacePath() async {
+    try {
+      return await api.invokeMethod("util.workspace");
+    } catch(e) {
+      log("NodeBase [E] utilGetWorkspacePath / ${e.toString()}");
+      return "";
+    }
+  }
+
   static Future<Map<String, dynamic>> apiAppStatus(String app) async {
     /* {
       state: "none" | "new" | "running" | "dead"

windows/runner/flutter_dart.h

@@ -341,6 +341,18 @@ flutter::EncodableValue utilGetArch() {
     }
     return flutter::EncodableValue(arch);
 }
+flutter::EncodableValue utilWorkspaceBaseDir() {
+    TCHAR buf[1024];
+    if (!GetModuleFileName(NULL, buf, 1024)) return flutter::EncodableValue(std::string(""));
+    buf[1023] = 0;
+    TCHAR* last = wcsrchr(buf, L'\\');
+    if (last == nullptr || last == buf || last == &(buf[1]) || last == &(buf[2])) {
+        // not found, buf = "\\", buf = "\\\\", buf = "c:\\"
+        return flutter::EncodableValue(std::string(""));
+    }
+    last[0] = 0;
+    return flutter::EncodableValue(Utf8FromUtf16(buf));
+}
 
 #define RETURN_BADARG_ERR(x) { result->Error("BAD_ARGS", "Invalid argument type for '" #x "'"); return; }
 void InitMethodChannel(flutter::FlutterEngine* flutter_instance) {
@@ -421,6 +433,9 @@ void InitMethodChannel(flutter::FlutterEngine* flutter_instance) {
                 else if (call.method_name().compare("util.arch") == 0) {
                     result->Success(utilGetArch());
                 }
+                else if (call.method_name().compare("util.workspace") == 0) {
+                    result->Success(utilWorkspaceBaseDir());
+                }
                 else {
                     result->NotImplemented();
                 }