From 9d2f0d82bc305c081b54787fb49a90471a429000 Mon Sep 17 00:00:00 2001
From: Pavel Labath <pavelo@centrum.sk>
Date: Sun, 3 Jul 2011 00:05:05 +0200
Subject: Add a new command which executes lua functions

---
 nls/fluxbox-nls.hh |  6 +++++
 src/FbCommands.cc  | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/FbCommands.hh  | 23 +++++++++++++++++-
 src/MenuCreator.cc |  2 ++
 4 files changed, 98 insertions(+), 1 deletion(-)

diff --git a/nls/fluxbox-nls.hh b/nls/fluxbox-nls.hh
index 13db6b6..6c3d5f0 100644
--- a/nls/fluxbox-nls.hh
+++ b/nls/fluxbox-nls.hh
@@ -143,6 +143,9 @@ enum {
 	MenuReconfigure = 8,
 	MenuRestart = 9,
 	MenuErrorEndEncoding = 10,
+	MenuFieldNotString = 11,
+	MenuMenuNotTable = 12,
+
 
 	RememberSet = 11,
 	RememberDecorations = 1,
@@ -251,6 +254,9 @@ enum {
 	LayerNormal = 5,
 	LayerTop = 6,
 
+	FbCommandsSet = 21,
+	FbCommandsCantLoadMenu = 1,
+
 	dummy_not_used = 0 // just for the end
 
 }; // end enum
diff --git a/src/FbCommands.cc b/src/FbCommands.cc
index a3a0c27..9f3acdc 100644
--- a/src/FbCommands.cc
+++ b/src/FbCommands.cc
@@ -31,6 +31,7 @@
 #include "MenuCreator.hh"
 
 #include "FbTk/I18n.hh"
+#include "FbTk/Luamm.hh"
 #include "FbTk/Theme.hh"
 #include "FbTk/Menu.hh"
 #include "FbTk/CommandParser.hh"
@@ -622,4 +623,71 @@ void ClientPatternTestCmd::execute() {
 }
 
 
+REGISTER_UNTRUSTED_COMMAND_WITH_ARGS(lua, LuaCmd, void);
+
+namespace {
+    const char LuaCmds[] = "FbCommands::LuaCmd";
+}
+
+LuaCmd::LuaCmd(const std::string &chunk) {
+    lua::state &l = Fluxbox::instance()->lua();
+    l.checkstack(1);
+    l.loadstring(chunk);
+    init(l);
+}
+
+LuaCmd::LuaCmd(lua::state &l) {
+    lua::stack_sentry s(l, -1);
+    if(l.isstring(-1)) {
+        const std::string &str = l.tostring(-1);
+        l.pop();
+        l.loadstring(str);
+    }
+    init(l);
+}
+
+void LuaCmd::init(lua::state &l) {
+    lua::stack_sentry s(l, -1);
+    l.checkstack(2);
+
+    l.rawgetfield(lua::REGISTRYINDEX, LuaCmds); {
+        if(l.isnil(-1)) {
+            l.pop();
+            l.newtable();
+
+            l.pushvalue(-1);
+            l.rawsetfield(lua::REGISTRYINDEX, LuaCmds);
+        }
+
+        l.pushvalue(-2);
+        m_ref = l.ref(-2);
+    } l.pop();
+
+    l.pop();
+}
+
+LuaCmd::~LuaCmd() {
+    lua::state &l = Fluxbox::instance()->lua();
+    l.checkstack(1);
+    lua::stack_sentry s(l);
+
+    l.rawgetfield(lua::REGISTRYINDEX, LuaCmds); {
+        l.unref(-1, m_ref);
+    } l.pop();
+}
+
+void LuaCmd::execute() {
+    lua::state &l = Fluxbox::instance()->lua();
+    l.checkstack(1);
+    lua::stack_sentry s(l);
+
+    l.rawgetfield(lua::REGISTRYINDEX, LuaCmds); {
+        assert(l.istable(-1));
+
+        l.rawgeti(-1, m_ref); {
+            assert(! l.isnil(-1));
+        } l.call(0, 0);
+    } l.pop();
+}
+
 } // end namespace FbCommands
diff --git a/src/FbCommands.hh b/src/FbCommands.hh
index d9639ad..bd377f5 100644
--- a/src/FbCommands.hh
+++ b/src/FbCommands.hh
@@ -32,6 +32,10 @@
 #include "ClientPattern.hh"
 #include "FocusableList.hh"
 
+namespace lua {
+class state;
+}
+
 namespace FbCommands {
 
 /// executes a system command
@@ -218,7 +222,6 @@ private:
     Destination m_dest;
 };
 
-
 /// test client pattern
 class ClientPatternTestCmd: public FbTk::Command<void> {
 public:
@@ -228,6 +231,24 @@ private:
     std::string m_args;
 };
 
+/// Command that runs a lua function
+class LuaCmd: public FbTk::Command<void> {
+public:
+    /// parses the string as a lua chunk
+    LuaCmd(const std::string &chunk);
+
+    /// expect the function to be on the lua stack (as a function or a string)
+    LuaCmd(lua::state &l);
+
+    ~LuaCmd();
+
+    void execute();
+private:
+    int m_ref;
+
+    void init(lua::state &l);
+};
+
 } // end namespace FbCommands
 
 #endif // FBCOMMANDS_HH
diff --git a/src/MenuCreator.cc b/src/MenuCreator.cc
index 46f233d..3b7667a 100644
--- a/src/MenuCreator.cc
+++ b/src/MenuCreator.cc
@@ -236,6 +236,7 @@ createMenu_(FbTk::Menu &inject_into, lua::state &l, FbTk::StringConvertor &conv,
 void
 insertMenuItem(lua::state &l, FbTk::Menu &menu, FbTk::StringConvertor &parent_conv,
                 FbTk::AutoReloadHelper *reloader) {
+    _FB_USES_NLS;
     lua::stack_sentry s(l, -1);
     l.checkstack(1);
 
@@ -351,6 +352,7 @@ MenuCreator::createMenu(FbTk::Menu &inject_into, lua::state &l, FbTk::AutoReload
     lua::stack_sentry s(l, -1);
 
     if(l.type(-1) != lua::TTABLE) {
+	_FB_USES_NLS;
         cerr << _FB_CONSOLETEXT(Menu, MenuNotTable, "Warning: Menu is not a lua table",
                         "Menu is not a lua table") << endl;
         return;
-- 
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