Hackstudio: Use `GUI::TextEditor' actions for cut/copy/paste buttons

This fixes a bug where hackstudio's language server will crash upon
clicking the 'cut' button when no text is selected.  This was because
the actions were not disabled on empty selection.

We now disable the actions depending on if there is empty selection
inside current tab. We update the cut/copy/paste buttons' actions when
changing tabs.

Userland/DevTools/HackStudio/HackStudioWidget.cpp

@@ -1171,6 +1171,7 @@ void HackStudioWidget::set_current_editor_wrapper(RefPtr<EditorWrapper> editor_w
     update_window_title();
     update_current_editor_title();
     update_tree_view();
+    update_toolbar_actions();
     set_current_editor_tab_widget(static_cast<GUI::TabWidget*>(m_current_editor_wrapper->parent()));
     m_current_editor_tab_widget->set_active_widget(editor_wrapper);
     update_statusbar();
@@ -1263,9 +1264,9 @@ void HackStudioWidget::create_toolbar(GUI::Widget& parent)
     toolbar.add_action(*m_delete_action);
     toolbar.add_separator();
 
-    toolbar.add_action(GUI::CommonActions::make_cut_action([this](auto&) { current_editor().cut_action().activate(); }, m_editors_splitter));
-    toolbar.add_action(GUI::CommonActions::make_copy_action([this](auto&) { current_editor().copy_action().activate(); }, m_editors_splitter));
-    toolbar.add_action(GUI::CommonActions::make_paste_action([this](auto&) { current_editor().paste_action().activate(); }, m_editors_splitter));
+    m_cut_button = toolbar.add_action(current_editor().cut_action());
+    m_copy_button = toolbar.add_action(current_editor().copy_action());
+    m_paste_button = toolbar.add_action(current_editor().paste_action());
     toolbar.add_separator();
     toolbar.add_action(GUI::CommonActions::make_undo_action([this](auto&) { current_editor().undo_action().activate(); }, m_editors_splitter));
     toolbar.add_action(GUI::CommonActions::make_redo_action([this](auto&) { current_editor().redo_action().activate(); }, m_editors_splitter));
@@ -1653,6 +1654,13 @@ void HackStudioWidget::update_tree_view()
     }
 }
 
+void HackStudioWidget::update_toolbar_actions()
+{
+    m_copy_button->set_action(current_editor().copy_action());
+    m_paste_button->set_action(current_editor().paste_action());
+    m_cut_button->set_action(current_editor().cut_action());
+}
+
 void HackStudioWidget::update_window_title()
 {
     window()->set_title(DeprecatedString::formatted("{} - {} - Hack Studio", m_current_editor_wrapper->filename_title(), m_project->name()));

Userland/DevTools/HackStudio/HackStudioWidget.h

@@ -16,6 +16,7 @@
 #include "GMLPreviewWidget.h"
 #include "Git/DiffViewer.h"
 #include "Git/GitWidget.h"
+#include "LibGUI/Button.h"
 #include "Locator.h"
 #include "Project.h"
 #include "ProjectBuilder.h"
@@ -163,6 +164,7 @@ private:
 
     void update_gml_preview();
     void update_tree_view();
+    void update_toolbar_actions();
     void on_cursor_change();
     void file_renamed(DeprecatedString const& old_name, DeprecatedString const& new_name);
 
@@ -257,6 +259,10 @@ private:
     RefPtr<GUI::Action> m_wrap_anywhere_action;
     RefPtr<GUI::Action> m_wrap_at_words_action;
 
+    RefPtr<GUI::Button> m_cut_button;
+    RefPtr<GUI::Button> m_paste_button;
+    RefPtr<GUI::Button> m_copy_button;
+
     Mode m_mode { Mode::Code };
     OwnPtr<Coredump::Inspector> m_coredump_inspector;
     OwnPtr<ProjectBuilder> m_project_builder;