Added the AssemblyEditor class

src/app/editor/assembly_editor.cc

@@ -0,0 +1,40 @@
+#include "assembly_editor.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+void AssemblyEditor::Update() {
+  SetEditorText();
+  auto cpos = text_editor_.GetCursorPosition();
+  ImGui::Begin("ASM Editor", &file_is_loaded_);
+  ImGui::Text("%6d/%-6d %6d lines  | %s | %s | %s | %s", cpos.mLine + 1,
+              cpos.mColumn + 1, text_editor_.GetTotalLines(),
+              text_editor_.IsOverwrite() ? "Ovr" : "Ins",
+              text_editor_.CanUndo() ? "*" : " ",
+              text_editor_.GetLanguageDefinition().mName.c_str(),
+              current_file_.c_str());
+
+  text_editor_.Render(current_file_.c_str());
+  ImGui::End();
+}
+
+void AssemblyEditor::ChangeActiveFile(const std::string & filename) {
+  current_file_ = filename;
+}
+
+void AssemblyEditor::SetEditorText() {
+  if (!file_is_loaded_) {
+    std::ifstream t(current_file_);
+    if (t.good()) {
+      std::string str((std::istreambuf_iterator<char>(t)),
+                      std::istreambuf_iterator<char>());
+      text_editor_.SetText(str);
+    }
+    file_is_loaded_ = true;
+  }
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze