PixelPaint: Move `request_close_editor()` logic inside `ImageEditor`

This allows us to request any specific editor to close itself. Earlier,
this could only be done for the currently active editor, so trying to
close inactive tabs would not work properly.

Userland/Applications/PixelPaint/ImageEditor.cpp

@@ -700,6 +700,24 @@ void ImageEditor::image_select_layer(Layer* layer)
     set_active_layer(layer);
 }
 
+bool ImageEditor::request_close()
+{
+    if (!undo_stack().is_current_modified())
+        return true;
+
+    auto result = GUI::MessageBox::ask_about_unsaved_changes(window(), path(), undo_stack().last_unmodified_timestamp());
+
+    if (result == GUI::MessageBox::ExecYes) {
+        save_project();
+        return true;
+    }
+
+    if (result == GUI::MessageBox::ExecNo)
+        return true;
+
+    return false;
+}
+
 void ImageEditor::save_project()
 {
     if (path().is_empty()) {

Userland/Applications/PixelPaint/ImageEditor.h

@@ -109,6 +109,8 @@ public:
     Gfx::FloatPoint image_position_to_editor_position(Gfx::IntPoint const&) const;
     Gfx::FloatPoint editor_position_to_image_position(Gfx::IntPoint const&) const;
 
+    bool request_close();
+
     void save_project_as();
     void save_project();
 

Userland/Applications/PixelPaint/MainWidget.cpp

@@ -64,8 +64,8 @@ MainWidget::MainWidget()
     };
 
     m_tab_widget->on_tab_close_click = [&](auto& widget) {
-        if (request_close_editor()) {
-            auto& image_editor = verify_cast<PixelPaint::ImageEditor>(widget);
+        auto& image_editor = verify_cast<PixelPaint::ImageEditor>(widget);
+        if (image_editor.request_close()) {
             m_tab_widget->deferred_invoke([&] {
                 m_tab_widget->remove_tab(image_editor);
                 if (m_tab_widget->children().size() == 1) {
@@ -728,32 +728,12 @@ void MainWidget::create_image_from_clipboard()
     m_layer_list_widget->set_selected_layer(layer);
 }
 
-bool MainWidget::request_close_editor()
-{
-    auto* editor = current_image_editor();
-    VERIFY(editor);
-
-    if (!editor->undo_stack().is_current_modified()) {
-        return true;
-    }
-
-    auto result = GUI::MessageBox::ask_about_unsaved_changes(window(), editor->path(), editor->undo_stack().last_unmodified_timestamp());
-
-    if (result == GUI::MessageBox::ExecYes) {
-        m_save_image_action->activate();
-        return true;
-    }
-
-    if (result == GUI::MessageBox::ExecNo)
-        return true;
-
-    return false;
-}
-
 bool MainWidget::request_close()
 {
     while (!m_tab_widget->children().is_empty()) {
-        if (!request_close_editor())
+        auto* editor = current_image_editor();
+        VERIFY(editor);
+        if (!editor->request_close())
             return false;
         m_tab_widget->remove_tab(*m_tab_widget->active_widget());
     }

Userland/Applications/PixelPaint/MainWidget.h

@@ -37,7 +37,6 @@ public:
     void open_image_fd(int fd, String const& path);
     void create_default_image();
 
-    bool request_close_editor();
     bool request_close();
 
 private: