LibGUI: Port AbstractThemePreview::set_theme_from_file to Core::Stream

Userland/Applications/DisplaySettings/ThemePreviewWidget.cpp

@@ -21,8 +21,8 @@ ThemePreviewWidget::ThemePreviewWidget(Gfx::Palette const& palette)
 
 ErrorOr<void> ThemePreviewWidget::set_theme(DeprecatedString path)
 {
-    auto config_file = TRY(Core::File::open(path, Core::OpenMode::ReadOnly));
-    TRY(set_theme_from_file(config_file));
+    auto config_file = TRY(Core::Stream::File::open(path, Core::Stream::OpenMode::Read));
+    TRY(set_theme_from_file(path, move(config_file)));
     return {};
 }
 

Userland/Libraries/LibGUI/AbstractThemePreview.cpp

@@ -85,9 +85,9 @@ void AbstractThemePreview::set_theme(Core::AnonymousBuffer const& theme_buffer)
     set_preview_palette(m_preview_palette);
 }
 
-ErrorOr<void> AbstractThemePreview::set_theme_from_file(Core::File& file)
+ErrorOr<void> AbstractThemePreview::set_theme_from_file(StringView path, NonnullOwnPtr<Core::Stream::File> file)
 {
-    auto config_file = TRY(Core::ConfigFile::open(file.filename(), file.leak_fd()));
+    auto config_file = TRY(Core::ConfigFile::open(path, move(file)));
     auto theme = TRY(Gfx::load_system_theme(config_file));
 
     m_preview_palette = Gfx::Palette(Gfx::PaletteImpl::create_with_anonymous_buffer(theme));

Userland/Libraries/LibGUI/AbstractThemePreview.h

@@ -24,7 +24,7 @@ public:
 
     Gfx::Palette const& preview_palette() const { return m_preview_palette; }
     void set_preview_palette(Gfx::Palette const&);
-    ErrorOr<void> set_theme_from_file(Core::File&);
+    ErrorOr<void> set_theme_from_file(StringView path, NonnullOwnPtr<Core::Stream::File>);
     void set_theme(Core::AnonymousBuffer const&);
 
     void paint_window(StringView title, Gfx::IntRect const& rect, Gfx::WindowTheme::WindowState, Gfx::Bitmap const& icon, int button_count = 3);