When LLFloaterLUADebug script returns a value, display the value.

The chunk:

return 1, 2, {}

differs in two ways from:

print(1, 2, {})

First, print() engages the Lua tostring() builtin, so it displays values as
Lua sees them. (For a table, tostring() displays "table: hex", which isn't so
wonderful.) But LLFloaterLUADebug serializes the LLSD converted from the Lua
return values.

Second, we've overridden print() to engage a function that writes to the
viewer log as well as displaying to LLFloaterLUADebug. (As we go forward, most
Lua scripts won't be run manually by LLFloaterLUADebug.) The values returned
by a Lua chunk aren't implicitly logged. Each C++ caller wanting to evaluate a
Lua expression can choose whether to log the results.

2 files changed, 36 insertions, 7 deletions

diff --git a/indra/newview/llfloaterluadebug.cpp b/indra/newview/llfloaterluadebug.cpp
index 58639490db..b2c001817f 100644
--- a/indra/newview/llfloaterluadebug.cpp
+++ b/indra/newview/llfloaterluadebug.cpp
@@ -37,6 +37,9 @@
 #include "llfloaterimnearbychat.h"
 
 #include "llluamanager.h"
+#include "llsdutil.h"
+#include "lua_function.h"
+#include "stringize.h"
 
 
 LLFloaterLUADebug::LLFloaterLUADebug(const LLSD &key)
@@ -74,9 +77,9 @@ void LLFloaterLUADebug::onExecuteClicked()
     mResultOutput->setValue("");
 
     std::string cmd = mLineInput->getText();
-    LLLUAmanager::runScriptLine(cmd, [this](std::string msg)
-        { 
-            mResultOutput->insertText(msg);
+    LLLUAmanager::runScriptLine(cmd, [this](int count, const LLSD& result)
+        {
+            completion(count, result);
         });
 }
 
@@ -104,10 +107,34 @@ void LLFloaterLUADebug::runSelectedScript(const std::vector<std::string> &filena
     if (!filepath.empty())
     {
         mScriptPath->setText(filepath);
-        LLLUAmanager::runScriptFile(filepath, [this](std::string msg) 
-            { 
-                mResultOutput->insertText(msg); 
-            });
+        LLLUAmanager::runScriptFile(filepath, [this](int count, const LLSD& result)
+        {
+            completion(count, result);
+        });
     }
 }
 
+void LLFloaterLUADebug::completion(int count, const LLSD& result)
+{
+    if (count < 0)
+    {
+        // error: show error message
+        mResultOutput->insertText("*** ");
+        mResultOutput->insertText(result.asString());
+        return;
+    }
+    if (count == 1)
+    {
+        // single result
+        mResultOutput->insertText(stringize(result));
+        return;
+    }
+    // 0 or multiple results
+    const char* sep = "";
+    for (const auto& item : llsd::inArray(result))
+    {
+        mResultOutput->insertText(sep);
+        mResultOutput->insertText(stringize(item));
+        sep = ", ";
+    }
+}
diff --git a/indra/newview/llfloaterluadebug.h b/indra/newview/llfloaterluadebug.h
index 1e26828c83..2dc59c5894 100644
--- a/indra/newview/llfloaterluadebug.h
+++ b/indra/newview/llfloaterluadebug.h
@@ -56,6 +56,8 @@ class LLFloaterLUADebug :
     void runSelectedScript(const std::vector<std::string> &filenames);
 
 private:
+    void completion(int count, const LLSD& result);
+
     LLTempBoundListener mOutConnection;
 
     LLTextEditor* mResultOutput;