add syntax highlighting (WIP)

src/graphics/ui/elements/TextBox.hpp

@@ -57,6 +57,8 @@ namespace gui {
         bool autoresize = false;
         bool showLineNumbers = false;
 
+        std::string syntax;
+
         void stepLeft(bool shiftPressed, bool breakSelection);
         void stepRight(bool shiftPressed, bool breakSelection);
         void stepDefaultDown(bool shiftPressed, bool breakSelection);
@@ -84,6 +86,8 @@ namespace gui {
         void refreshLabel();
 
         void onInput();
+
+        void refreshSyntax();
     public:
         TextBox(
             std::wstring placeholder, 
@@ -219,5 +223,7 @@ namespace gui {
         virtual std::shared_ptr<UINode> getAt(glm::vec2 pos, std::shared_ptr<UINode> self) override;
         virtual void setOnUpPressed(const runnable &callback);
         virtual void setOnDownPressed(const runnable &callback);
+
+        virtual void setSyntax(const std::string& lang);
     };
 }