[gtksourceview/wip/exalm/preview-style] styleschemepreview: Simplify layout and use box-shadow for styles

[Alexander Mikhaylenko <alexm src gnome org>]

commit c2242319189be25f8ffd1acde74172ad699324e2
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Apr 6 22:57:42 2022 +0400

    styleschemepreview: Simplify layout and use box-shadow for styles
    
    Make it more flexible so apps can e.g. add .card and get libadwaita styles
    on it.

 gtksourceview/GtkSourceView.css             | 13 ++++++-------
 gtksourceview/gtksourcestyleschemepreview.c | 17 +++++------------
 2 files changed, 11 insertions(+), 19 deletions(-)
---
diff --git a/gtksourceview/GtkSourceView.css b/gtksourceview/GtkSourceView.css
index e049364c..fb684fe3 100644
--- a/gtksourceview/GtkSourceView.css
+++ b/gtksourceview/GtkSourceView.css
@@ -150,14 +150,13 @@ GtkSourceAssistant.informative.question image {
   background-color: @borders;
 }
 
-GtkSourceStyleSchemePreview frame {
-  margin: 1px;
-  border-radius: 11px;
+GtkSourceStyleSchemePreview {
+  border-radius: 12px;
+  box-shadow: 0 0 0 1px @borders;
+  margin: 2px;
 }
-GtkSourceStyleSchemePreview.selected frame {
-  border-color: @theme_selected_bg_color;
-  border-width: 2px;
-  margin: 0;
+GtkSourceStyleSchemePreview.selected {
+  box-shadow: 0 0 0 2px @theme_selected_bg_color;
 }
 GtkSourceStyleSchemePreview.selected image {
   border-radius: 9999px;
diff --git a/gtksourceview/gtksourcestyleschemepreview.c b/gtksourceview/gtksourcestyleschemepreview.c
index d90e0dc7..082d0f92 100644
--- a/gtksourceview/gtksourcestyleschemepreview.c
+++ b/gtksourceview/gtksourcestyleschemepreview.c
@@ -259,10 +259,8 @@ gtk_source_style_scheme_preview_constructed (GObject *object)
        GtkSourceStyleSchemePreview *self = (GtkSourceStyleSchemePreview *)object;
        GtkSourceBuffer *buffer;
        GtkSourceView *view;
-       GtkOverlay *overlay;
        const char *name;
        GtkLabel *label;
-       GtkFrame *frame;
 
        G_OBJECT_CLASS (gtk_source_style_scheme_preview_parent_class)->constructed (object);
 
@@ -278,10 +276,6 @@ gtk_source_style_scheme_preview_constructed (GObject *object)
        name = gtk_source_style_scheme_get_name (self->scheme);
        gtk_widget_set_tooltip_text (GTK_WIDGET (self), name);
 
-       frame = g_object_new (GTK_TYPE_FRAME,
-                             "can-focus", FALSE,
-                             "focusable", FALSE,
-                             NULL);
        view = g_object_new (GTK_SOURCE_TYPE_VIEW,
                             "focusable", FALSE,
                             "can-focus", FALSE,
@@ -295,7 +289,6 @@ gtk_source_style_scheme_preview_constructed (GObject *object)
                             "width-request", 120,
                             "right-margin", 9,
                             NULL);
-       overlay = g_object_new (GTK_TYPE_OVERLAY, NULL);
        label = g_object_new (GTK_TYPE_LABEL, NULL);
        self->image = g_object_new (GTK_TYPE_IMAGE,
                                    "icon-name", "object-select-symbolic",
@@ -311,11 +304,11 @@ gtk_source_style_scheme_preview_constructed (GObject *object)
        add_text (buffer, self->scheme);
        load_override_font (view);
 
-       gtk_frame_set_child (frame, GTK_WIDGET (overlay));
-       gtk_overlay_set_child (overlay, GTK_WIDGET (view));
-       gtk_overlay_add_overlay (overlay, GTK_WIDGET (label));
-       gtk_overlay_add_overlay (overlay, GTK_WIDGET (self->image));
-       gtk_widget_set_parent (GTK_WIDGET (frame), GTK_WIDGET (self));
+       gtk_widget_set_parent (GTK_WIDGET (view), GTK_WIDGET (self));
+       gtk_widget_set_parent (GTK_WIDGET (label), GTK_WIDGET (self));
+       gtk_widget_set_parent (GTK_WIDGET (self->image), GTK_WIDGET (self));
+
+       gtk_widget_set_overflow (GTK_WIDGET (self), GTK_OVERFLOW_HIDDEN);
 }
 
 static void