HackStudio: Add a "document dirty" indicator to the EditorWrapper

Userland/DevTools/HackStudio/EditorWrapper.cpp

@@ -51,6 +51,13 @@ EditorWrapper::EditorWrapper()
     m_editor->on_open = [](String path) {
         open_file(path);
     };
+
+    m_editor->on_change = [this] {
+        bool was_dirty = m_document_dirty;
+        m_document_dirty = true;
+        if (!was_dirty)
+            update_title();
+    };
 }
 
 EditorWrapper::~EditorWrapper()
@@ -80,10 +87,28 @@ void EditorWrapper::set_mode_non_displayable()
     editor().set_palette(palette);
     editor().document().set_text("The contents of this file could not be displayed. Is it a binary file?");
 }
+
 void EditorWrapper::set_filename(const String& filename)
 {
     m_filename = filename;
-    m_filename_label->set_text(m_filename);
+    update_title();
+}
+
+void EditorWrapper::save()
+{
+    editor().write_to_file(filename());
+    m_document_dirty = false;
+    update_title();
+}
+
+void EditorWrapper::update_title()
+{
+    StringBuilder title;
+    title.append(m_filename);
+
+    if (m_document_dirty)
+        title.append(" (*)");
+    m_filename_label->set_text(title.to_string());
 }
 
 }

Userland/DevTools/HackStudio/EditorWrapper.h

@@ -26,6 +26,8 @@ public:
     Editor& editor() { return *m_editor; }
     const Editor& editor() const { return *m_editor; }
 
+    void save();
+
     GUI::Label& filename_label() { return *m_filename_label; }
     const GUI::Label& filename_label() const { return *m_filename_label; }
 
@@ -40,10 +42,13 @@ public:
 private:
     EditorWrapper();
 
+    void update_title();
+
     String m_filename;
     RefPtr<GUI::Label> m_filename_label;
     RefPtr<GUI::Label> m_cursor_label;
     RefPtr<Editor> m_editor;
+    bool m_document_dirty {false};
 };
 
 }

Userland/DevTools/HackStudio/HackStudioWidget.cpp

@@ -552,7 +552,7 @@ NonnullRefPtr<GUI::Action> HackStudioWidget::create_save_action()
         if (active_file().is_empty())
             return;
 
-        current_editor().write_to_file(active_file());
+        current_editor_wrapper().save();
 
         if (m_git_widget->initialized())
             m_git_widget->refresh();