[gtk/wip/baedert/for-master: 18/23] layoutoverlay: Avoid adding 0 sized color nodes

[Timm Bäder <baedert src gnome org>]

commit 2feac2772fe79aadd9e0811b7ff8d44c19a276a6
Author: Timm Bäder <mail baedert org>
Date:   Mon Dec 21 08:30:51 2020 +0100

    layoutoverlay: Avoid adding 0 sized color nodes
    
    This way, the output node file of the listbox demo in gtk4-demo with
    enabled layout borders is only 3.8MB instead of 12MB.

 gtk/inspector/layoutoverlay.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)
---
diff --git a/gtk/inspector/layoutoverlay.c b/gtk/inspector/layoutoverlay.c
index 74f4084084..3924f03bb8 100644
--- a/gtk/inspector/layoutoverlay.c
+++ b/gtk/inspector/layoutoverlay.c
@@ -65,9 +65,9 @@ static void
 recurse_child_widgets (GtkWidget   *widget,
                        GtkSnapshot *snapshot)
 {
-  gboolean needs_clip;
   int width = gtk_widget_get_width (widget);
   int height = gtk_widget_get_height (widget);
+  gboolean needs_clip;
   GtkCssStyle *style;
   GtkWidget *child;
   GtkBorder boxes[4];
@@ -107,14 +107,18 @@ recurse_child_widgets (GtkWidget   *widget,
       const GdkRGBA *color = &colors[i];
       const GtkBorder *box = &boxes[i];
 
-      gtk_snapshot_append_color (snapshot, color,
-                                 &GRAPHENE_RECT_INIT ( 0, - box->top, width, box->top));
-      gtk_snapshot_append_color (snapshot, color,
-                                 &GRAPHENE_RECT_INIT (width, 0, box->right, height));
-      gtk_snapshot_append_color (snapshot, color,
-                                 &GRAPHENE_RECT_INIT (0, height, width, box->bottom));
-      gtk_snapshot_append_color (snapshot, color,
-                                 &GRAPHENE_RECT_INIT (- box->left, 0, box->left, height));
+      if (box->top > 0)
+        gtk_snapshot_append_color (snapshot, color,
+                                   &GRAPHENE_RECT_INIT ( 0, - box->top, width, box->top));
+      if (box->right > 0)
+        gtk_snapshot_append_color (snapshot, color,
+                                   &GRAPHENE_RECT_INIT (width, 0, box->right, height));
+      if (box->bottom > 0)
+        gtk_snapshot_append_color (snapshot, color,
+                                   &GRAPHENE_RECT_INIT (0, height, width, box->bottom));
+      if (box->left > 0)
+        gtk_snapshot_append_color (snapshot, color,
+                                   &GRAPHENE_RECT_INIT (- box->left, 0, box->left, height));
 
       /* Grow box + offset */
       width += box->left + box->right;