From 289176cb4c0108ad2ceab57b9a5a60ce4cc0b10e Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Thu, 17 Mar 2022 05:31:57 +0100
Subject: [PATCH] Allow building core LK engine without wxWidgets

---
 include/lk/absyn.h  | 29 +++++++++++++++++++++++++++++
 include/lk/stdlib.h |  5 +++++
 src/stdlib.cpp      |  2 ++
 3 files changed, 36 insertions(+)

diff --git a/include/lk/absyn.h b/include/lk/absyn.h
index 4db7e6f..7ef5aff 100644
--- a/include/lk/absyn.h
+++ b/include/lk/absyn.h
@@ -54,6 +54,7 @@ typedef wxStringEqual lk_string_equal;
 
 #else
 #include <string>
+#include <sstream>
 
 typedef std::string::value_type lk_char;
 typedef std::string lk_string;
@@ -61,6 +62,34 @@ typedef std::string lk_string;
 typedef std::hash<std::string> lk_string_hash;
 typedef std::equal_to<std::string> lk_string_equal;
 
+inline lk_string& operator << (lk_string& a, const lk_string& lstr)
+{
+    a += lstr;
+    return a;
+}
+
+inline lk_string& operator << (lk_string& a, const char* s)
+{
+    a += s;
+    return a;
+}
+
+inline lk_string& operator << (lk_string& a, int i)
+{
+    std::stringstream sstr;
+    sstr << i;
+    a += sstr.str();
+    return a;
+}
+
+inline lk_string& operator << (lk_string& a, size_t i)
+{
+    std::stringstream sstr;
+    sstr << i;
+    a += sstr.str();
+    return a;
+}
+
 #endif
 
 #define lk_tr(s) lk::get_translation(s)
diff --git a/include/lk/stdlib.h b/include/lk/stdlib.h
index 4678866..803a502 100644
--- a/include/lk/stdlib.h
+++ b/include/lk/stdlib.h
@@ -25,7 +25,9 @@
 #ifndef __lk_stdlib_h
 #define __lk_stdlib_h
 
+#ifdef LK_USE_WXWIDGETS
 #include <wx/wx.h>
+#endif
 
 #include <lk/env.h>
 
@@ -162,6 +164,8 @@ namespace lk {
     double erfc(double x);
 };
 
+#ifdef LK_USE_WXWIDGETS
+
 class MyMessageDialog : public wxDialog {
 public:
     MyMessageDialog(wxWindow *parent,
@@ -254,5 +258,6 @@ DECLARE_EVENT_TABLE();
 };
 
 wxWindow *GetCurrentTopLevelWindow();
+#endif
 
 #endif
diff --git a/src/stdlib.cpp b/src/stdlib.cpp
index 702708c..0ee036f 100644
--- a/src/stdlib.cpp
+++ b/src/stdlib.cpp
@@ -4100,6 +4100,7 @@ double lk::erfc(double x) {
     return x < 0.0 ? 1.0 + gammp(0.5, x * x) : gammq(0.5, x * x);
 }
 
+#ifdef LK_USE_WXWIDGETS
 wxWindow *GetCurrentTopLevelWindow() {
     wxWindowList &wl = ::wxTopLevelWindows;
     for (wxWindowList::iterator it = wl.begin(); it != wl.end(); ++it)
@@ -4109,6 +4110,7 @@ wxWindow *GetCurrentTopLevelWindow() {
 
     return 0;
 }
+#endif
 
 #ifdef WIN32