From fa02cdceab9c4059c74f7bbe6d58cd1a2fa787a2 Mon Sep 17 00:00:00 2001
From: Pavel Labath <pavelo@centrum.sk>
Date: Sat, 13 Feb 2010 17:00:20 +0100
Subject: [PATCH] An object-oriented api for accessing data sources from lua

---
 src/conky.cc      |  2 ++
 src/lua-config.cc | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/conky.cc b/src/conky.cc
index cf2e7f9b..6203e64c 100644
--- a/src/conky.cc
+++ b/src/conky.cc
@@ -4323,6 +4323,8 @@ int main(int argc, char **argv)
 				"print(conky.asnumber(conky.variables.asdf{}));\n"
 				"print(conky.astext(conky.variables.asdf{}));\n"
 				"print(conky.asnumber(conky.variables.zxcv{}));\n"
+				"print(conky.variables.asdf{}.text);\n"
+				"print(conky.variables.asdf{}.xxx);\n"
 				);
 		l.call(0, 0);
 	}
diff --git a/src/lua-config.cc b/src/lua-config.cc
index ae9f32e3..455e871e 100644
--- a/src/lua-config.cc
+++ b/src/lua-config.cc
@@ -64,6 +64,17 @@ namespace conky {
 			l->setmetatable(-2);
 			return 1;
 		}
+
+		const char data_source__index[] = 
+			"local table, key = ...;\n"
+			"if key == 'num' then\n"
+			"  return conky.asnumber(table);\n"
+			"elseif key == 'text' then\n"
+			"  return conky.astext(table);\n"
+			"else\n"
+			"  print(string.format([[Invalid data source operation: '%s']], key));\n"
+			"  return 0/0;\n"
+			"end\n";
 	}
 
 	void export_symbols(lua::state &l)
@@ -77,6 +88,9 @@ namespace conky {
 
 			l.pushdestructor<std::shared_ptr<data_source_base>>(); ++s;
 			l.rawsetfield(-2, "__gc"); --s;
+
+			l.loadstring(data_source__index); ++s;
+			l.rawsetfield(-2, "__index"); --s;
 		} l.pop(); --s;
 
 		l.newtable(); ++s; {